v3.1.10

- workaround for WebKit bugs
- PhantomJS users should enable this output option

closes #2489

.github/ISSUE_TEMPLATE.md

@@ -1,9 +1,29 @@
-- Bug report or feature request? <!-- Note: sub-optimal but correct code is not a bug -->
+**Bug report or feature request?** 
-- `uglify-js` version (`uglifyjs -V`)
+
-- JavaScript input - ideally as small as possible.
+<!-- Note: sub-optimal but correct code is not a bug -->
-- The `uglifyjs` CLI command executed or `minify()` options used.
+
-- An example of JavaScript output produced and/or the error or warning.
+**ES5 or ES6+ input?** 
+
+<!-- Note: for ES6 see: https://github.com/mishoo/UglifyJS2/tree/harmony#harmony -->
+
+**Uglify version (`uglifyjs -V`)**
+
+**JavaScript input**
+
 <!--
-    Note: the release version of uglify-js only supports ES5. Those wishing
+    A complete parsable JS program exhibiting the issue with
-    to minify ES6 should use the experimental harmony branch.
+    UglifyJS alone - without third party tools or libraries.
+    Ideally the input should be as small as possible.
+    Post a link to a gist if necessary.
+
+    Issues without a reproducible test case will be closed.
+-->
+
+**The `uglifyjs` CLI command executed or `minify()` options used.**
+
+**JavaScript output or error produced.**
+
+<!--
+    Note: `uglify-js` only supports ES5. 
+    Those wishing to minify ES6 should use `uglify-es`.
 -->

.travis.yml

@@ -1,12 +1,14 @@
 language: node_js
-before_install: "npm install -g npm"
 node_js:
     - "0.10"
     - "0.12"
     - "4"
     - "6"
+    - "8"
 env:
     - UGLIFYJS_TEST_ALL=1
 matrix:
   fast_finish: true
 sudo: false
+cache:
+  directories: tmp

bin/extract-props.js

@@ -1,77 +0,0 @@
-#! /usr/bin/env node
-
-"use strict";
-
-var U2 = require("../tools/node");
-var fs = require("fs");
-var yargs = require("yargs");
-var ARGS = yargs
-    .describe("o", "Output file")
-    .argv;
-var files = ARGS._.slice();
-var output = {
-    vars: {},
-    props: {}
-};
-
-if (ARGS.o) try {
-    output = JSON.parse(fs.readFileSync(ARGS.o, "utf8"));
-} catch(ex) {}
-
-files.forEach(getProps);
-
-if (ARGS.o) {
-    fs.writeFileSync(ARGS.o, JSON.stringify(output, null, 2), "utf8");
-} else {
-    console.log("%s", JSON.stringify(output, null, 2));
-}
-
-function getProps(filename) {
-    var code = fs.readFileSync(filename, "utf8");
-    var ast = U2.parse(code);
-
-    ast.walk(new U2.TreeWalker(function(node){
-        if (node instanceof U2.AST_ObjectKeyVal) {
-            add(node.key);
-        }
-        else if (node instanceof U2.AST_ObjectProperty) {
-            add(node.key.name);
-        }
-        else if (node instanceof U2.AST_Dot) {
-            add(node.property);
-        }
-        else if (node instanceof U2.AST_Sub) {
-            addStrings(node.property);
-        }
-    }));
-
-    function addStrings(node) {
-        var out = {};
-        try {
-            (function walk(node){
-                node.walk(new U2.TreeWalker(function(node){
-                    if (node instanceof U2.AST_Seq) {
-                        walk(node.cdr);
-                        return true;
-                    }
-                    if (node instanceof U2.AST_String) {
-                        add(node.value);
-                        return true;
-                    }
-                    if (node instanceof U2.AST_Conditional) {
-                        walk(node.consequent);
-                        walk(node.alternative);
-                        return true;
-                    }
-                    throw out;
-                }));
-            })(node);
-        } catch(ex) {
-            if (ex !== out) throw ex;
-        }
-    }
-
-    function add(name) {
-        output.props[name] = true;
-    }
-}

bin/uglifyjs

@@ -3,633 +3,399 @@
 
 "use strict";
 
-var UglifyJS = require("../tools/node");
+// workaround for tty output truncation upon process.exit()
-var sys = require("util");
+[process.stdout, process.stderr].forEach(function(stream){
-var yargs = require("yargs");
+    if (stream._handle && stream._handle.setBlocking)
-var fs = require("fs");
+        stream._handle.setBlocking(true);
-var path = require("path");
-var acorn;
-var screw_ie8 = true;
-var ARGS = yargs
-    .usage("$0 input1.js [input2.js ...] [options]\n\
-Use a single dash to read input from the standard input.\
-\n\n\
-NOTE: by default there is no mangling/compression.\n\
-Without [options] it will simply parse input files and dump the AST\n\
-with whitespace and comments discarded.  To achieve compression and\n\
-mangling you need to use `-c` and `-m`.\
-")
-    .describe("source-map", "Specify an output file where to generate source map.")
-    .describe("source-map-root", "The path to the original source to be included in the source map.")
-    .describe("source-map-url", "The path to the source map to be added in //# sourceMappingURL.  Defaults to the value passed with --source-map.")
-    .describe("source-map-inline", "Write base64-encoded source map to the end of js output.  Disabled by default")
-    .describe("source-map-include-sources", "Pass this flag if you want to include the content of source files in the source map as sourcesContent property.")
-    .describe("in-source-map", "Input source map, useful if you're compressing JS that was generated from some other original code.")
-    .describe("screw-ie8", "Do not support Internet Explorer 6/7/8. This flag is enabled by default.")
-    .describe("support-ie8", "Support non-standard Internet Explorer 6/7/8 javascript.")
-    .describe("expr", "Parse a single expression, rather than a program (for parsing JSON)")
-    .describe("p", "Skip prefix for original filenames that appear in source maps. \
-For example -p 3 will drop 3 directories from file names and ensure they are relative paths. \
-You can also specify -p relative, which will make UglifyJS figure out itself the relative paths between original sources, \
-the source map and the output file.")
-    .describe("o", "Output file (default STDOUT).")
-    .describe("b", "Beautify output/specify output options.")
-    .describe("m", "Mangle names/pass mangler options.")
-    .describe("r", "Reserved names to exclude from mangling.")
-    .describe("c", "Enable compressor/pass compressor options. \
-Pass options like -c hoist_vars=false,if_return=false. \
-Use -c with no argument to use the default compression options.")
-    .describe("d", "Global definitions")
-    .describe("e", "Embed everything in a big function, with a configurable parameter/argument list.")
-
-    .describe("comments", "Preserve copyright comments in the output. \
-By default this works like Google Closure, keeping JSDoc-style comments that contain \"@license\" or \"@preserve\". \
-You can optionally pass one of the following arguments to this flag:\n\
-- \"all\" to keep all comments\n\
-- a valid JS RegExp like `/foo/`or `/^!/` to keep only matching comments.\n\
-\
-Note that currently not *all* comments can be kept when compression is on, \
-because of dead code removal or cascading statements into sequences.")
-
-    .describe("preamble", "Preamble to prepend to the output.  You can use this to insert a \
-comment, for example for licensing information.  This will not be \
-parsed, but the source map will adjust for its presence.")
-
-    .describe("stats", "Display operations run time on STDERR.")
-    .describe("acorn", "Use Acorn for parsing.")
-    .describe("spidermonkey", "Assume input files are SpiderMonkey AST format (as JSON).")
-    .describe("self", "Build itself (UglifyJS2) as a library (implies --wrap=UglifyJS --export-all)")
-    .describe("wrap", "Embed everything in a big function, making the “exports” and “global” variables available. \
-You need to pass an argument to this option to specify the name that your module will take when included in, say, a browser.")
-    .describe("export-all", "Only used when --wrap, this tells UglifyJS to add code to automatically export all globals.")
-    .describe("lint", "Display some scope warnings")
-    .describe("v", "Verbose")
-    .describe("V", "Print version number and exit.")
-    .describe("noerr", "Don't throw an error for unknown options in -c, -b or -m.")
-    .describe("bare-returns", "Allow return outside of functions.  Useful when minifying CommonJS modules.")
-    .describe("keep-fnames", "Do not mangle/drop function names.  Useful for code relying on Function.prototype.name.")
-    .describe("quotes", "Quote style (0 - auto, 1 - single, 2 - double, 3 - original)")
-    .describe("reserved-file", "File containing reserved names")
-    .describe("reserve-domprops", "Make (most?) DOM properties reserved for --mangle-props")
-    .describe("mangle-props", "Mangle property names (0 - disabled, 1 - mangle all properties, 2 - mangle unquoted properies)")
-    .describe("mangle-regex", "Only mangle property names matching the regex")
-    .describe("name-cache", "File to hold mangled names mappings")
-    .describe("pure-funcs", "List of functions that can be safely removed if their return value is not used")
-    .describe("dump-spidermonkey-ast", "Dump SpiderMonkey AST to stdout.")
-    .describe("wrap-iife", "Wrap IIFEs in parenthesis. Note: this disables the negate_iife compression option")
-
-    .alias("p", "prefix")
-    .alias("o", "output")
-    .alias("v", "verbose")
-    .alias("b", "beautify")
-    .alias("m", "mangle")
-    .alias("c", "compress")
-    .alias("d", "define")
-    .alias("r", "reserved")
-    .alias("V", "version")
-    .alias("e", "enclose")
-    .alias("q", "quotes")
-
-    .string("source-map")
-    .string("source-map-root")
-    .string("source-map-url")
-    .string("b")
-    .string("beautify")
-    .string("m")
-    .string("mangle")
-    .string("mangle-props-debug")
-    .string("c")
-    .string("compress")
-    .string("d")
-    .string("define")
-    .string("e")
-    .string("enclose")
-    .string("comments")
-    .string("wrap")
-    .string("p")
-    .string("prefix")
-    .string("name-cache")
-
-    .array("reserved-file")
-    .array("pure-funcs")
-
-    .boolean("expr")
-    .boolean("source-map-inline")
-    .boolean("source-map-include-sources")
-    .boolean("screw-ie8")
-    .boolean("support-ie8")
-    .boolean("export-all")
-    .boolean("self")
-    .boolean("v")
-    .boolean("verbose")
-    .boolean("stats")
-    .boolean("acorn")
-    .boolean("spidermonkey")
-    .boolean("dump-spidermonkey-ast")
-    .boolean("lint")
-    .boolean("V")
-    .boolean("version")
-    .boolean("noerr")
-    .boolean("bare-returns")
-    .boolean("keep-fnames")
-    .boolean("reserve-domprops")
-    .boolean("wrap-iife")
-
-    .wrap(80)
-
-    .argv
-;
-
-normalize(ARGS);
-
-if (ARGS.noerr) {
-    UglifyJS.DefaultsError.croak = function(msg, defs) {
-        print_error("WARN: " + msg);
-    };
-}
-
-if (ARGS.version || ARGS.V) {
-    var json = require("../package.json");
-    print(json.name + ' ' + json.version);
-    process.exit(0);
-}
-
-if (ARGS.ast_help) {
-    var desc = UglifyJS.describe_ast();
-    print(typeof desc == "string" ? desc : JSON.stringify(desc, null, 2));
-    process.exit(0);
-}
-
-if (ARGS.h || ARGS.help) {
-    print(yargs.help());
-    process.exit(0);
-}
-
-if (ARGS.acorn) {
-    acorn = require("acorn");
-}
-
-var COMPRESS = getOptions("c", true);
-var MANGLE = getOptions("m", true);
-var BEAUTIFY = getOptions("b", true);
-var RESERVED = null;
-
-if (ARGS.reserved_file) ARGS.reserved_file.forEach(function(filename){
-    RESERVED = UglifyJS.readReservedFile(filename, RESERVED);
 });
 
-if (ARGS.reserve_domprops) {
+var fs = require("fs");
-    RESERVED = UglifyJS.readDefaultReservedFile(RESERVED);
+var info = require("../package.json");
-}
+var path = require("path");
+var program = require("commander");
+var UglifyJS = require("../tools/node");
 
-if (ARGS.d) {
+var skip_keys = [ "cname", "enclosed", "inlined", "parent_scope", "scope", "thedef", "uses_eval", "uses_with" ];
-    if (COMPRESS) COMPRESS.global_defs = getOptions("d");
+var files = {};
-}
+var options = {
-
+    compress: false,
-if (ARGS.pure_funcs) {
+    mangle: false
-    if (COMPRESS) COMPRESS.pure_funcs = ARGS.pure_funcs;
-}
-
-if (ARGS.r) {
-    if (MANGLE) MANGLE.except = ARGS.r.replace(/^\s+|\s+$/g).split(/\s*,+\s*/);
-}
-
-if (RESERVED && MANGLE) {
-    if (!MANGLE.except) MANGLE.except = RESERVED.vars;
-    else MANGLE.except = MANGLE.except.concat(RESERVED.vars);
-}
-
-function readNameCache(key) {
-    return UglifyJS.readNameCache(ARGS.name_cache, key);
-}
-
-function writeNameCache(key, cache) {
-    return UglifyJS.writeNameCache(ARGS.name_cache, key, cache);
-}
-
-function extractRegex(str) {
-  if (/^\/.*\/[a-zA-Z]*$/.test(str)) {
-    var regex_pos = str.lastIndexOf("/");
-    return new RegExp(str.substr(1, regex_pos - 1), str.substr(regex_pos + 1));
-  } else {
-    throw new Error("Invalid regular expression: " + str);
-  }
-}
-
-if (ARGS.quotes === true) {
-    ARGS.quotes = 3;
-}
-
-if (ARGS.mangle_props === true) {
-    ARGS.mangle_props = 1;
-} else if (ARGS.mangle_props === "unquoted") {
-    ARGS.mangle_props = 2;
-}
-
-var OUTPUT_OPTIONS = {
-    beautify     : BEAUTIFY ? true : false,
-    max_line_len : 32000,
-    preamble     : ARGS.preamble || null,
-    quote_style  : ARGS.quotes != null ? ARGS.quotes : 0,
 };
-
+program.version(info.name + " " + info.version);
-if (ARGS.mangle_props == 2) {
+program.parseArgv = program.parse;
-    OUTPUT_OPTIONS.keep_quoted_props = true;
+program.parse = undefined;
-    if (COMPRESS && !("properties" in COMPRESS))
+if (process.argv.indexOf("ast") >= 0) program.helpInformation = UglifyJS.describe_ast;
-        COMPRESS.properties = false;
+else if (process.argv.indexOf("options") >= 0) program.helpInformation = function() {
+    var text = [];
+    var options = UglifyJS.default_options();
+    for (var option in options) {
+        text.push("--" + (option == "output" ? "beautify" : option == "sourceMap" ? "source-map" : option) + " options:");
+        text.push(format_object(options[option]));
+        text.push("");
+    }
+    return text.join("\n");
+};
+program.option("-p, --parse <options>", "Specify parser options.", parse_js());
+program.option("-c, --compress [options]", "Enable compressor/specify compressor options.", parse_js());
+program.option("-m, --mangle [options]", "Mangle names/specify mangler options.", parse_js());
+program.option("--mangle-props [options]", "Mangle properties/specify mangler options.", parse_js());
+program.option("-b, --beautify [options]", "Beautify output/specify output options.", parse_js());
+program.option("-o, --output <file>", "Output file (default STDOUT).");
+program.option("--comments [filter]", "Preserve copyright comments in the output.");
+program.option("--config-file <file>", "Read minify() options from JSON file.");
+program.option("-d, --define <expr>[=value]", "Global definitions.", parse_js("define"));
+program.option("--ie8", "Support non-standard Internet Explorer 8.");
+program.option("--keep-fnames", "Do not mangle/drop function names. Useful for code relying on Function.prototype.name.");
+program.option("--name-cache <file>", "File to hold mangled name mappings.");
+program.option("--self", "Build UglifyJS as a library (implies --wrap UglifyJS)");
+program.option("--source-map [options]", "Enable source map/specify source map options.", parse_source_map());
+program.option("--timings", "Display operations run time on STDERR.")
+program.option("--toplevel", "Compress and/or mangle variables in toplevel scope.");
+program.option("--verbose", "Print diagnostic messages.");
+program.option("--warn", "Print warning messages.");
+program.option("--wrap <name>", "Embed everything as a function with “exports” corresponding to “name” globally.");
+program.arguments("[files...]").parseArgv(process.argv);
+if (program.configFile) {
+    options = JSON.parse(read_file(program.configFile));
 }
-
+if (!program.output && program.sourceMap && program.sourceMap.url != "inline") {
-if (ARGS.support_ie8 === true && ARGS.screw_ie8 !== true) {
+    fatal("ERROR: cannot write source map to STDOUT");
-    screw_ie8 = false;
 }
-
+[
-if (COMPRESS) COMPRESS.screw_ie8 = screw_ie8;
+    "compress",
-if (MANGLE) MANGLE.screw_ie8 = screw_ie8;
+    "ie8",
-OUTPUT_OPTIONS.screw_ie8 = screw_ie8;
+    "mangle",
-
+    "sourceMap",
-if (ARGS.keep_fnames) {
+    "toplevel",
-    if (COMPRESS) COMPRESS.keep_fnames = true;
+    "wrap"
-    if (MANGLE) MANGLE.keep_fnames = true;
+].forEach(function(name) {
+    if (name in program) {
+        options[name] = program[name];
+    }
+});
+if (program.beautify) {
+    options.output = typeof program.beautify == "object" ? program.beautify : {};
+    if (!("beautify" in options.output)) {
+        options.output.beautify = true;
+    }
 }
-
+if (program.comments) {
-if (ARGS.wrap_iife) {
+    if (typeof options.output != "object") options.output = {};
-    if (COMPRESS) COMPRESS.negate_iife = false;
+    options.output.comments = typeof program.comments == "string" ? program.comments : "some";
-    OUTPUT_OPTIONS.wrap_iife = true;
 }
-
+if (program.define) {
-if (BEAUTIFY)
+    if (typeof options.compress != "object") options.compress = {};
-    UglifyJS.merge(OUTPUT_OPTIONS, BEAUTIFY);
+    if (typeof options.compress.global_defs != "object") options.compress.global_defs = {};
-
+    for (var expr in program.define) {
-if (ARGS.comments === "") {
+        options.compress.global_defs[expr] = program.define[expr];
-    OUTPUT_OPTIONS.comments = "some";
+    }
-} else {
-    OUTPUT_OPTIONS.comments = ARGS.comments;
 }
-
+if (program.keepFnames) {
-var files = ARGS._.slice();
+    options.keep_fnames = true;
-
+}
-if (process.platform === "win32")
+if (program.mangleProps) {
-    files = UglifyJS.simple_glob(files);
+    if (program.mangleProps.domprops) {
-
+        delete program.mangleProps.domprops;
-if (ARGS.self) {
+    } else {
-    if (files.length > 0) {
+        if (typeof program.mangleProps != "object") program.mangleProps = {};
+        if (!Array.isArray(program.mangleProps.reserved)) program.mangleProps.reserved = [];
+        require("../tools/domprops").forEach(function(name) {
+            UglifyJS._push_uniq(program.mangleProps.reserved, name);
+        });
+    }
+    if (typeof options.mangle != "object") options.mangle = {};
+    options.mangle.properties = program.mangleProps;
+}
+if (program.nameCache) {
+    options.nameCache = JSON.parse(read_file(program.nameCache, "{}"));
+}
+if (program.output == "ast") {
+    options.output = {
+        ast: true,
+        code: false
+    };
+}
+if (program.parse) {
+    if (!program.parse.acorn && !program.parse.spidermonkey) {
+        options.parse = program.parse;
+    } else if (program.sourceMap && program.sourceMap.content == "inline") {
+        fatal("ERROR: inline source map only works with built-in parser");
+    }
+}
+var convert_path = function(name) {
+    return name;
+};
+if (typeof program.sourceMap == "object" && "base" in program.sourceMap) {
+    convert_path = function() {
+        var base = program.sourceMap.base;
+        delete options.sourceMap.base;
+        return function(name) {
+            return path.relative(base, name);
+        };
+    }();
+}
+if (program.verbose) {
+    options.warnings = "verbose";
+} else if (program.warn) {
+    options.warnings = true;
+}
+if (program.self) {
+    if (program.args.length) {
         print_error("WARN: Ignoring input files since --self was passed");
     }
-    files = UglifyJS.FILES;
+    if (!options.wrap) options.wrap = "UglifyJS";
-    if (!ARGS.wrap) ARGS.wrap = "UglifyJS";
+    simple_glob(UglifyJS.FILES).forEach(function(name) {
+        files[convert_path(name)] = read_file(name);
+    });
+    run();
+} else if (program.args.length) {
+    simple_glob(program.args).forEach(function(name) {
+        files[convert_path(name)] = read_file(name);
+    });
+    run();
+} else {
+    var chunks = [];
+    process.stdin.setEncoding("utf8");
+    process.stdin.on("data", function(chunk) {
+        chunks.push(chunk);
+    }).on("end", function() {
+        files = [ chunks.join("") ];
+        run();
+    });
+    process.stdin.resume();
 }
 
-var ORIG_MAP = ARGS.in_source_map;
+function convert_ast(fn) {
-
+    return UglifyJS.AST_Node.from_mozilla_ast(Object.keys(files).reduce(fn, null));
-if (ORIG_MAP && ORIG_MAP != "inline") {
-    ORIG_MAP = JSON.parse(fs.readFileSync(ORIG_MAP));
-    if (files.length == 0) {
-        print_error("INFO: Using file from the input source map: " + ORIG_MAP.file);
-        files = [ ORIG_MAP.file ];
-    }
 }
 
-if (files.length == 0) {
+function run() {
-    files = [ "-" ];
+    UglifyJS.AST_Node.warn_function = function(msg) {
-}
+        print_error("WARN: " + msg);
-
+    };
-if (ORIG_MAP == "inline") {
+    if (program.timings) options.timings = true;
-    if (files.length > 1) {
+    try {
-        print_error("ERROR: Inline source map only works with singular input");
+        if (program.parse) {
-        process.exit(1);
+            if (program.parse.acorn) {
-    }
+                files = convert_ast(function(toplevel, name) {
-    if (ARGS.acorn || ARGS.spidermonkey) {
+                    return require("acorn").parse(files[name], {
-        print_error("ERROR: Inline source map only works with built-in parser");
+                        locations: true,
-        process.exit(1);
+                        program: toplevel,
-    }
+                        sourceFile: name
-}
+                    });
-
+                });
-if (files.indexOf("-") >= 0 && ARGS.source_map) {
+            } else if (program.parse.spidermonkey) {
-    print_error("ERROR: Source map doesn't work with input from STDIN");
+                files = convert_ast(function(toplevel, name) {
-    process.exit(1);
+                    var obj = JSON.parse(files[name]);
-}
+                    if (!toplevel) return obj;
-
+                    toplevel.body = toplevel.body.concat(obj.body);
-if (files.filter(function(el){ return el == "-" }).length > 1) {
+                    return toplevel;
-    print_error("ERROR: Can read a single file from STDIN (two or more dashes specified)");
-    process.exit(1);
-}
-
-var STATS = {};
-var TOPLEVEL = null;
-var P_RELATIVE = ARGS.p && ARGS.p == "relative";
-var SOURCES_CONTENT = {};
-var index = 0;
-
-!function cb() {
-    if (index == files.length) return done();
-    var file = files[index++];
-    read_whole_file(file, function (err, code) {
-        if (err) {
-            print_error("ERROR: can't read file: " + file);
-            process.exit(1);
-        }
-        if (ORIG_MAP == "inline") {
-            ORIG_MAP = read_source_map(code);
-        }
-        if (ARGS.p != null) {
-            if (P_RELATIVE) {
-                file = path.relative(path.dirname(ARGS.source_map), file).replace(/\\/g, '/');
-            } else {
-                var p = parseInt(ARGS.p, 10);
-                if (!isNaN(p)) {
-                    file = file.replace(/^\/+/, "").split(/\/+/).slice(ARGS.p).join("/");
-                }
-            }
-        }
-        SOURCES_CONTENT[file] = code;
-        time_it("parse", function(){
-            if (ARGS.spidermonkey) {
-                var program = JSON.parse(code);
-                if (!TOPLEVEL) TOPLEVEL = program;
-                else TOPLEVEL.body = TOPLEVEL.body.concat(program.body);
-            }
-            else if (ARGS.acorn) {
-                TOPLEVEL = acorn.parse(code, {
-                    locations     : true,
-                    sourceFile    : file,
-                    program       : TOPLEVEL
                 });
             }
-            else {
+        }
-                try {
+    } catch (ex) {
-                    TOPLEVEL = UglifyJS.parse(code, {
+        fatal(ex);
-                        filename     : file,
+    }
-                        toplevel     : TOPLEVEL,
+    var result = UglifyJS.minify(files, options);
-                        expression   : ARGS.expr,
+    if (result.error) {
-                        bare_returns : ARGS.bare_returns,
+        var ex = result.error;
-                    });
+        if (ex.name == "SyntaxError") {
-                } catch(ex) {
+            print_error("Parse error at " + ex.filename + ":" + ex.line + "," + ex.col);
-                    if (ex instanceof UglifyJS.JS_Parse_Error) {
+            var col = ex.col;
-                        print_error("Parse error at " + file + ":" + ex.line + "," + ex.col);
+            var lines = files[ex.filename].split(/\r?\n/);
-                        var col = ex.col;
+            var line = lines[ex.line - 1];
-                        var line = code.split(/\r?\n/)[ex.line - (col ? 1 : 2)];
+            if (!line && !col) {
-                        if (line) {
+                line = lines[ex.line - 2];
-                            if (col > 40) {
+                col = line.length;
-                                line = line.slice(col - 40);
+            }
-                                col = 40;
+            if (line) {
-                            }
+                var limit = 70;
-                            if (col) {
+                if (col > limit) {
-                                print_error(line.slice(0, 80));
+                    line = line.slice(col - limit);
-                                print_error(line.slice(0, col).replace(/\S/g, " ") + "^");
+                    col = limit;
-                            } else {
-                                print_error(line.slice(-40));
-                                print_error(line.slice(-40).replace(/\S/g, " ") + "^");
-                            }
-                        }
-                        print_error(ex.stack);
-                        process.exit(1);
-                    }
-                    throw ex;
                 }
-            };
+                print_error(line.slice(0, 80));
-        });
+                print_error(line.slice(0, col).replace(/\S/g, " ") + "^");
-        cb();
+            }
-    });
+        }
-}();
+        if (ex.defs) {
-
-function done() {
-    var OUTPUT_FILE = ARGS.o;
-
-    var SOURCE_MAP = (ARGS.source_map || ARGS.source_map_inline) ? UglifyJS.SourceMap({
-        file: P_RELATIVE ? path.relative(path.dirname(ARGS.source_map), OUTPUT_FILE) : OUTPUT_FILE,
-        root: ARGS.source_map_root || ORIG_MAP && ORIG_MAP.sourceRoot,
-        orig: ORIG_MAP,
-    }) : null;
-
-    OUTPUT_OPTIONS.source_map = SOURCE_MAP;
-
-    try {
-        var output = UglifyJS.OutputStream(OUTPUT_OPTIONS);
-        var compressor = COMPRESS && UglifyJS.Compressor(COMPRESS);
-    } catch(ex) {
-        if (ex instanceof UglifyJS.DefaultsError) {
-            print_error(ex.message);
             print_error("Supported options:");
-            print_error(sys.inspect(ex.defs));
+            print_error(format_object(ex.defs));
-            process.exit(1);
         }
-    }
+        fatal(ex);
-
+    } else if (program.output == "ast") {
-    if (ARGS.acorn || ARGS.spidermonkey) time_it("convert_ast", function(){
+        print(JSON.stringify(result.ast, function(key, value) {
-        TOPLEVEL = UglifyJS.AST_Node.from_mozilla_ast(TOPLEVEL);
+            if (skip_key(key)) return;
-    });
+            if (value instanceof UglifyJS.AST_Token) return;
-
+            if (value instanceof UglifyJS.Dictionary) return;
-    if (ARGS.wrap != null) {
+            if (value instanceof UglifyJS.AST_Node) {
-        TOPLEVEL = TOPLEVEL.wrap_commonjs(ARGS.wrap, ARGS.export_all);
+                var result = {
-    }
+                    _class: "AST_" + value.TYPE
-
+                };
-    if (ARGS.enclose != null) {
+                value.CTOR.PROPS.forEach(function(prop) {
-        var arg_parameter_list = ARGS.enclose;
+                    result[prop] = value[prop];
-        if (arg_parameter_list === true) {
+                });
-            arg_parameter_list = [];
+                return result;
-        }
-        else if (!(arg_parameter_list instanceof Array)) {
-            arg_parameter_list = [arg_parameter_list];
-        }
-        TOPLEVEL = TOPLEVEL.wrap_enclose(arg_parameter_list);
-    }
-
-    if (ARGS.mangle_props || ARGS.name_cache) (function(){
-        var reserved = RESERVED ? RESERVED.props : null;
-        var cache = readNameCache("props");
-        var regex;
-
-        try {
-          regex = ARGS.mangle_regex ? extractRegex(ARGS.mangle_regex) : null;
-        } catch (e) {
-            print_error("ERROR: Invalid --mangle-regex: " + e.message);
-            process.exit(1);
-        }
-
-        TOPLEVEL = UglifyJS.mangle_properties(TOPLEVEL, {
-            reserved      : reserved,
-            cache         : cache,
-            only_cache    : !ARGS.mangle_props,
-            regex         : regex,
-            ignore_quoted : ARGS.mangle_props == 2,
-            debug         : typeof ARGS.mangle_props_debug === "undefined" ? false : ARGS.mangle_props_debug
-        });
-        writeNameCache("props", cache);
-    })();
-
-    var SCOPE_IS_NEEDED = COMPRESS || MANGLE || ARGS.lint
-    var TL_CACHE = readNameCache("vars");
-    if (MANGLE) MANGLE.cache = TL_CACHE;
-
-    if (SCOPE_IS_NEEDED) {
-        time_it("scope", function(){
-            TOPLEVEL.figure_out_scope(MANGLE || { screw_ie8: screw_ie8, cache: TL_CACHE });
-            if (ARGS.lint) {
-                TOPLEVEL.scope_warnings();
             }
-        });
+            return value;
-    }
+        }, 2));
-
+    } else if (program.output == "spidermonkey") {
-    if (COMPRESS) {
+        print(JSON.stringify(UglifyJS.minify(result.code, {
-        time_it("squeeze", function(){
+            compress: false,
-            TOPLEVEL = compressor.compress(TOPLEVEL);
+            mangle: false,
-        });
+            output: {
-    }
+                ast: true,
-
+                code: false
-    if (SCOPE_IS_NEEDED) {
-        time_it("scope", function(){
-            TOPLEVEL.figure_out_scope(MANGLE || { screw_ie8: screw_ie8, cache: TL_CACHE });
-            if (MANGLE && !TL_CACHE) {
-                TOPLEVEL.compute_char_frequency(MANGLE);
-            }
-        });
-    }
-
-    if (MANGLE) time_it("mangle", function(){
-        TOPLEVEL.mangle_names(MANGLE);
-    });
-
-    writeNameCache("vars", TL_CACHE);
-
-    if (ARGS.source_map_include_sources) {
-        for (var file in SOURCES_CONTENT) {
-            if (SOURCES_CONTENT.hasOwnProperty(file)) {
-                SOURCE_MAP.get().setSourceContent(file, SOURCES_CONTENT[file]);
             }
+        }).ast.to_mozilla_ast(), null, 2));
+    } else if (program.output) {
+        fs.writeFileSync(program.output, result.code);
+        if (result.map) {
+            fs.writeFileSync(program.output + ".map", result.map);
         }
-    }
-
-    if (ARGS.dump_spidermonkey_ast) {
-        print(JSON.stringify(TOPLEVEL.to_mozilla_ast(), null, 2));
     } else {
-        time_it("generate", function(){
+        print(result.code);
-            TOPLEVEL.print(output);
+    }
-        });
+    if (program.nameCache) {
+        fs.writeFileSync(program.nameCache, JSON.stringify(options.nameCache));
+    }
+    if (result.timings) for (var phase in result.timings) {
+        print_error("- " + phase + ": " + result.timings[phase].toFixed(3) + "s");
+    }
+}
 
-        output = output.get();
+function fatal(message) {
+    if (message instanceof Error) message = message.stack.replace(/^\S*?Error:/, "ERROR:")
+    print_error(message);
+    process.exit(1);
+}
 
-        if (SOURCE_MAP) {
+// A file glob function that only supports "*" and "?" wildcards in the basename.
-            if (ARGS.source_map_inline) {
+// Example: "foo/bar/*baz??.*.js"
-                var base64_string = new Buffer(SOURCE_MAP.toString()).toString('base64');
+// Argument `glob` may be a string or an array of strings.
-                output += "\n//# sourceMappingURL=data:application/json;charset=utf-8;base64," + base64_string;
+// Returns an array of strings. Garbage in, garbage out.
-            } else {
+function simple_glob(glob) {
-                fs.writeFileSync(ARGS.source_map, SOURCE_MAP, "utf8");
+    if (Array.isArray(glob)) {
-                var source_map_url = ARGS.source_map_url || (
+        return [].concat.apply([], glob.map(simple_glob));
-                    P_RELATIVE
+    }
-                        ? path.relative(path.dirname(OUTPUT_FILE), ARGS.source_map)
+    if (glob.match(/\*|\?/)) {
-                        : ARGS.source_map
+        var dir = path.dirname(glob);
-                );
+        try {
-                output += "\n//# sourceMappingURL=" + source_map_url;
+            var entries = fs.readdirSync(dir);
-            }
+        } catch (ex) {}
-        }
+        if (entries) {
-
+            var pattern = "^" + path.basename(glob)
-        if (OUTPUT_FILE) {
+                .replace(/[.+^$[\]\\(){}]/g, "\\$&")
-            fs.writeFileSync(OUTPUT_FILE, output, "utf8");
+                .replace(/\*/g, "[^/\\\\]*")
-        } else {
+                .replace(/\?/g, "[^/\\\\]") + "$";
-            print(output);
+            var mod = process.platform === "win32" ? "i" : "";
+            var rx = new RegExp(pattern, mod);
+            var results = entries.filter(function(name) {
+                return rx.test(name);
+            }).map(function(name) {
+                return path.join(dir, name);
+            });
+            if (results.length) return results;
         }
     }
+    return [ glob ];
+}
 
-    if (ARGS.stats) {
+function read_file(path, default_value) {
-        print_error(UglifyJS.string_template("Timing information (compressed {count} files):", {
+    try {
-            count: files.length
+        return fs.readFileSync(path, "utf8");
-        }));
+    } catch (ex) {
-        for (var i in STATS) if (STATS.hasOwnProperty(i)) {
+        if (ex.code == "ENOENT" && default_value != null) return default_value;
-            print_error(UglifyJS.string_template("- {name}: {time}s", {
+        fatal(ex);
-                name: i,
+    }
-                time: (STATS[i] / 1000).toFixed(3)
+}
+
+function parse_js(flag) {
+    return function(value, options) {
+        options = options || {};
+        try {
+            UglifyJS.minify(value, {
+                parse: {
+                    expression: true
+                },
+                compress: false,
+                mangle: false,
+                output: {
+                    ast: true,
+                    code: false
+                }
+            }).ast.walk(new UglifyJS.TreeWalker(function(node) {
+                if (node instanceof UglifyJS.AST_Assign) {
+                    var name = node.left.print_to_string();
+                    var value = node.right;
+                    if (flag) {
+                        options[name] = value;
+                    } else if (value instanceof UglifyJS.AST_Array) {
+                        options[name] = value.elements.map(to_string);
+                    } else {
+                        options[name] = to_string(value);
+                    }
+                    return true;
+                }
+                if (node instanceof UglifyJS.AST_Symbol || node instanceof UglifyJS.AST_PropAccess) {
+                    var name = node.print_to_string();
+                    options[name] = true;
+                    return true;
+                }
+                if (!(node instanceof UglifyJS.AST_Sequence)) throw node;
+
+                function to_string(value) {
+                    return value instanceof UglifyJS.AST_Constant ? value.getValue() : value.print_to_string({
+                        quote_keys: true
+                    });
+                }
             }));
-        }
-    }
-}
-
-/* -----[ functions ]----- */
-
-function normalize(o) {
-    for (var i in o) if (o.hasOwnProperty(i) && /-/.test(i)) {
-        o[i.replace(/-/g, "_")] = o[i];
-        delete o[i];
-    }
-}
-
-function getOptions(flag, constants) {
-    var x = ARGS[flag];
-    if (x == null || x === false) return null;
-    var ret = {};
-    if (x !== "") {
-        if (Array.isArray(x)) x = x.map(function (v) { return "(" + v + ")"; }).join(", ");
-
-        var ast;
-        try {
-            ast = UglifyJS.parse(x, { cli: true, expression: true });
         } catch(ex) {
-            if (ex instanceof UglifyJS.JS_Parse_Error) {
+            if (flag) {
-                print_error("Error parsing arguments for flag `" + flag + "': " + x);
+                fatal("Error parsing arguments for '" + flag + "': " + value);
-                process.exit(1);
+            } else {
+                options[value] = null;
             }
         }
-        ast.walk(new UglifyJS.TreeWalker(function(node){
+        return options;
-            if (node instanceof UglifyJS.AST_Seq) return; // descend
-            if (node instanceof UglifyJS.AST_Assign) {
-                var name = node.left.print_to_string().replace(/-/g, "_");
-                var value = node.right;
-                if (constants)
-                    value = new Function("return (" + value.print_to_string() + ")")();
-                ret[name] = value;
-                return true;    // no descend
-            }
-            if (node instanceof UglifyJS.AST_Symbol || node instanceof UglifyJS.AST_Binary) {
-                var name = node.print_to_string().replace(/-/g, "_");
-                ret[name] = true;
-                return true;    // no descend
-            }
-            print_error(node.TYPE)
-            print_error("Error parsing arguments for flag `" + flag + "': " + x);
-            process.exit(1);
-        }));
-    }
-    return ret;
-}
-
-function read_whole_file(filename, cb) {
-    if (filename == "-") {
-        var chunks = [];
-        process.stdin.setEncoding('utf-8');
-        process.stdin.on('data', function (chunk) {
-            chunks.push(chunk);
-        }).on('end', function () {
-            cb(null, chunks.join(""));
-        });
-        process.openStdin();
-    } else {
-        fs.readFile(filename, "utf-8", cb);
     }
 }
 
-function read_source_map(code) {
+function parse_source_map() {
-    var match = /\n\/\/# sourceMappingURL=data:application\/json(;.*?)?;base64,(.*)/.exec(code);
+    var parse = parse_js();
-    if (!match) {
+    return function(value, options) {
-        print_error("WARN: inline source map not found");
+        var hasContent = options && "content" in options;
-        return null;
+        var settings = parse(value, options);
+        if (!hasContent && settings.content && settings.content != "inline") {
+            print_error("INFO: Using input source map: " + settings.content);
+            settings.content = read_file(settings.content, settings.content);
+        }
+        return settings;
     }
-    return JSON.parse(new Buffer(match[2], "base64"));
 }
 
-function time_it(name, cont) {
+function skip_key(key) {
-    var t1 = new Date().getTime();
+    return skip_keys.indexOf(key) >= 0;
-    var ret = cont();
+}
-    if (ARGS.stats) {
+
-        var spent = new Date().getTime() - t1;
+function format_object(obj) {
-        if (STATS[name]) STATS[name] += spent;
+    var lines = [];
-        else STATS[name] = spent;
+    var padding = "";
-    }
+    Object.keys(obj).map(function(name) {
-    return ret;
+        if (padding.length < name.length) padding = Array(name.length + 1).join(" ");
+        return [ name, JSON.stringify(obj[name]) ];
+    }).forEach(function(tokens) {
+        lines.push("  " + tokens[0] + padding.slice(tokens[0].length - 2) + tokens[1]);
+    });
+    return lines.join("\n");
 }
 
 function print_error(msg) {
-    console.error("%s", msg);
+    process.stderr.write(msg);
+    process.stderr.write("\n");
 }
 
 function print(txt) {
-    console.log("%s", txt);
+    process.stdout.write(txt);
+    process.stdout.write("\n");
 }

lib/ast.js

@@ -134,11 +134,10 @@ var AST_Debugger = DEFNODE("Debugger", null, {
     $documentation: "Represents a debugger statement",
 }, AST_Statement);
 
-var AST_Directive = DEFNODE("Directive", "value scope quote", {
+var AST_Directive = DEFNODE("Directive", "value quote", {
     $documentation: "Represents a directive, like \"use strict\";",
     $propdoc: {
         value: "[string] The value of this directive as a plain string (it's not an AST_String!)",
-        scope: "[AST_Scope/S] The scope that this directive affects",
         quote: "[string] the original quote character"
     },
 }, AST_Statement);
@@ -182,21 +181,13 @@ var AST_BlockStatement = DEFNODE("BlockStatement", null, {
 }, AST_Block);
 
 var AST_EmptyStatement = DEFNODE("EmptyStatement", null, {
-    $documentation: "The empty statement (empty block or simply a semicolon)",
+    $documentation: "The empty statement (empty block or simply a semicolon)"
-    _walk: function(visitor) {
-        return visitor._visit(this);
-    }
 }, AST_Statement);
 
 var AST_StatementWithBody = DEFNODE("StatementWithBody", "body", {
     $documentation: "Base class for all statements that contain one nested body: `For`, `ForIn`, `Do`, `While`, `With`",
     $propdoc: {
         body: "[AST_Statement] the body; this should always be present, even if it's an AST_EmptyStatement"
-    },
-    _walk: function(visitor) {
-        return visitor._visit(this, function(){
-            this.body._walk(visitor);
-        });
     }
 }, AST_Statement);
 
@@ -214,12 +205,13 @@ var AST_LabeledStatement = DEFNODE("LabeledStatement", "label", {
     clone: function(deep) {
         var node = this._clone(deep);
         if (deep) {
-            var refs = node.label.references;
+            var label = node.label;
-            var label = this.label;
+            var def = this.label;
             node.walk(new TreeWalker(function(node) {
                 if (node instanceof AST_LoopControl
-                    && node.label && node.label.thedef === label) {
+                    && node.label && node.label.thedef === def) {
-                    refs.push(node);
+                    node.label.thedef = label;
+                    label.references.push(node);
                 }
             }));
         }
@@ -306,10 +298,9 @@ var AST_With = DEFNODE("With", "expression", {
 
 /* -----[ scope and functions ]----- */
 
-var AST_Scope = DEFNODE("Scope", "directives variables functions uses_with uses_eval parent_scope enclosed cname", {
+var AST_Scope = DEFNODE("Scope", "variables functions uses_with uses_eval parent_scope enclosed cname", {
     $documentation: "Base class for all statements introducing a lexical scope",
     $propdoc: {
-        directives: "[string*/S] an array of directives declared in this scope",
         variables: "[Object/S] a map of name -> SymbolDef for all variables/functions defined in this scope",
         functions: "[Object/S] like `variables`, but only lists function declarations",
         uses_with: "[boolean/S] tells whether this scope uses the `with` statement",
@@ -325,62 +316,13 @@ var AST_Toplevel = DEFNODE("Toplevel", "globals", {
     $propdoc: {
         globals: "[Object/S] a map of name -> SymbolDef for all undeclared names",
     },
-    wrap_enclose: function(arg_parameter_pairs) {
+    wrap_commonjs: function(name) {
-        var self = this;
+        var body = this.body;
-        var args = [];
+        var wrapped_tl = "(function(exports){'$ORIG';})(typeof " + name + "=='undefined'?(" + name + "={}):" + name + ");";
-        var parameters = [];
-
-        arg_parameter_pairs.forEach(function(pair) {
-            var splitAt = pair.lastIndexOf(":");
-
-            args.push(pair.substr(0, splitAt));
-            parameters.push(pair.substr(splitAt + 1));
-        });
-
-        var wrapped_tl = "(function(" + parameters.join(",") + "){ '$ORIG'; })(" + args.join(",") + ")";
         wrapped_tl = parse(wrapped_tl);
         wrapped_tl = wrapped_tl.transform(new TreeTransformer(function before(node){
             if (node instanceof AST_Directive && node.value == "$ORIG") {
-                return MAP.splice(self.body);
+                return MAP.splice(body);
-            }
-        }));
-        return wrapped_tl;
-    },
-    wrap_commonjs: function(name, export_all) {
-        var self = this;
-        var to_export = [];
-        if (export_all) {
-            self.figure_out_scope();
-            self.walk(new TreeWalker(function(node){
-                if (node instanceof AST_SymbolDeclaration && node.definition().global) {
-                    if (!find_if(function(n){ return n.name == node.name }, to_export))
-                        to_export.push(node);
-                }
-            }));
-        }
-        var wrapped_tl = "(function(exports, global){ '$ORIG'; '$EXPORTS'; global['" + name + "'] = exports; }({}, (function(){return this}())))";
-        wrapped_tl = parse(wrapped_tl);
-        wrapped_tl = wrapped_tl.transform(new TreeTransformer(function before(node){
-            if (node instanceof AST_Directive) {
-                switch (node.value) {
-                  case "$ORIG":
-                    return MAP.splice(self.body);
-                  case "$EXPORTS":
-                    var body = [];
-                    to_export.forEach(function(sym){
-                        body.push(new AST_SimpleStatement({
-                            body: new AST_Assign({
-                                left: new AST_Sub({
-                                    expression: new AST_SymbolRef({ name: "exports" }),
-                                    property: new AST_String({ value: sym.name }),
-                                }),
-                                operator: "=",
-                                right: new AST_SymbolRef(sym),
-                            }),
-                        }));
-                    });
-                    return MAP.splice(body);
-                }
             }
         }));
         return wrapped_tl;
@@ -410,11 +352,11 @@ var AST_Accessor = DEFNODE("Accessor", null, {
     $documentation: "A setter/getter function.  The `name` property is always null."
 }, AST_Lambda);
 
-var AST_Function = DEFNODE("Function", null, {
+var AST_Function = DEFNODE("Function", "inlined", {
     $documentation: "A function expression"
 }, AST_Lambda);
 
-var AST_Defun = DEFNODE("Defun", null, {
+var AST_Defun = DEFNODE("Defun", "inlined", {
     $documentation: "A function definition"
 }, AST_Lambda);
 
@@ -551,10 +493,10 @@ var AST_Finally = DEFNODE("Finally", null, {
     $documentation: "A `finally` node; only makes sense as part of a `try` statement"
 }, AST_Block);
 
-/* -----[ VAR/CONST ]----- */
+/* -----[ VAR ]----- */
 
 var AST_Definitions = DEFNODE("Definitions", "definitions", {
-    $documentation: "Base class for `var` or `const` nodes (variable declarations/initializations)",
+    $documentation: "Base class for `var` nodes (variable declarations/initializations)",
     $propdoc: {
         definitions: "[AST_VarDef*] array of variable definitions"
     },
@@ -572,14 +514,10 @@ var AST_Var = DEFNODE("Var", null, {
     $documentation: "A `var` statement"
 }, AST_Definitions);
 
-var AST_Const = DEFNODE("Const", null, {
-    $documentation: "A `const` statement"
-}, AST_Definitions);
-
 var AST_VarDef = DEFNODE("VarDef", "name value", {
     $documentation: "A variable declaration; only appears in a AST_Definitions node",
     $propdoc: {
-        name: "[AST_SymbolVar|AST_SymbolConst] name of the variable",
+        name: "[AST_SymbolVar] name of the variable",
         value: "[AST_Node?] initializer, or null of there's no initializer"
     },
     _walk: function(visitor) {
@@ -600,11 +538,11 @@ var AST_Call = DEFNODE("Call", "expression args", {
     },
     _walk: function(visitor) {
         return visitor._visit(this, function(){
-            this.expression._walk(visitor);
             var args = this.args;
             for (var i = 0, len = args.length; i < len; i++) {
                 args[i]._walk(visitor);
             }
+            this.expression._walk(visitor);
         });
     }
 });
@@ -613,68 +551,16 @@ var AST_New = DEFNODE("New", null, {
     $documentation: "An object instantiation.  Derives from a function call since it has exactly the same properties"
 }, AST_Call);
 
-var AST_Seq = DEFNODE("Seq", "car cdr", {
+var AST_Sequence = DEFNODE("Sequence", "expressions", {
-    $documentation: "A sequence expression (two comma-separated expressions)",
+    $documentation: "A sequence expression (comma-separated expressions)",
     $propdoc: {
-        car: "[AST_Node] first element in sequence",
+        expressions: "[AST_Node*] array of expressions (at least two)"
-        cdr: "[AST_Node] second element in sequence"
-    },
-    $cons: function(x, y) {
-        var seq = new AST_Seq(x);
-        seq.car = x;
-        seq.cdr = y;
-        return seq;
-    },
-    $from_array: function(array) {
-        if (array.length == 0) return null;
-        if (array.length == 1) return array[0].clone();
-        var list = null;
-        for (var i = array.length; --i >= 0;) {
-            list = AST_Seq.cons(array[i], list);
-        }
-        var p = list;
-        while (p) {
-            if (p.cdr && !p.cdr.cdr) {
-                p.cdr = p.cdr.car;
-                break;
-            }
-            p = p.cdr;
-        }
-        return list;
-    },
-    to_array: function() {
-        var p = this, a = [];
-        while (p) {
-            a.push(p.car);
-            if (p.cdr && !(p.cdr instanceof AST_Seq)) {
-                a.push(p.cdr);
-                break;
-            }
-            p = p.cdr;
-        }
-        return a;
-    },
-    add: function(node) {
-        var p = this;
-        while (p) {
-            if (!(p.cdr instanceof AST_Seq)) {
-                var cell = AST_Seq.cons(p.cdr, node);
-                return p.cdr = cell;
-            }
-            p = p.cdr;
-        }
-    },
-    len: function() {
-        if (this.cdr instanceof AST_Seq) {
-            return this.cdr.len() + 1;
-        } else {
-            return 2;
-        }
     },
     _walk: function(visitor) {
         return visitor._visit(this, function(){
-            this.car._walk(visitor);
+            this.expressions.forEach(function(node) {
-            if (this.cdr) this.cdr._walk(visitor);
+                node._walk(visitor);
+            });
         });
     }
 });
@@ -727,7 +613,7 @@ var AST_UnaryPostfix = DEFNODE("UnaryPostfix", null, {
     $documentation: "Unary postfix expression, i.e. `i++`"
 }, AST_Unary);
 
-var AST_Binary = DEFNODE("Binary", "left operator right", {
+var AST_Binary = DEFNODE("Binary", "operator left right", {
     $documentation: "Binary expression, i.e. `a + b`",
     $propdoc: {
         left: "[AST_Node] left-hand side expression",
@@ -797,8 +683,8 @@ var AST_Object = DEFNODE("Object", "properties", {
 var AST_ObjectProperty = DEFNODE("ObjectProperty", "key value", {
     $documentation: "Base class for literal object properties",
     $propdoc: {
-        key: "[string] the property name converted to a string for ObjectKeyVal.  For setters and getters this is an arbitrary AST_Node.",
+        key: "[string] the property name converted to a string for ObjectKeyVal.  For setters and getters this is an AST_SymbolAccessor.",
-        value: "[AST_Node] property value.  For setters and getters this is an AST_Function."
+        value: "[AST_Node] property value.  For setters and getters this is an AST_Accessor."
     },
     _walk: function(visitor) {
         return visitor._visit(this, function(){
@@ -836,17 +722,13 @@ var AST_SymbolAccessor = DEFNODE("SymbolAccessor", null, {
 }, AST_Symbol);
 
 var AST_SymbolDeclaration = DEFNODE("SymbolDeclaration", "init", {
-    $documentation: "A declaration symbol (symbol in var/const, function name or argument, symbol in catch)",
+    $documentation: "A declaration symbol (symbol in var, function name or argument, symbol in catch)",
 }, AST_Symbol);
 
 var AST_SymbolVar = DEFNODE("SymbolVar", null, {
     $documentation: "Symbol defining a variable",
 }, AST_SymbolDeclaration);
 
-var AST_SymbolConst = DEFNODE("SymbolConst", null, {
-    $documentation: "A constant declaration"
-}, AST_SymbolDeclaration);
-
 var AST_SymbolFunarg = DEFNODE("SymbolFunarg", null, {
     $documentation: "Symbol naming a function argument",
 }, AST_SymbolVar);
@@ -975,13 +857,13 @@ TreeWalker.prototype = {
         if (!ret && descend) {
             descend.call(node);
         }
-        this.pop(node);
+        this.pop();
         return ret;
     },
     parent: function(n) {
         return this.stack[this.stack.length - 2 - (n || 0)];
     },
-    push: function (node) {
+    push: function(node) {
         if (node instanceof AST_Lambda) {
             this.directives = Object.create(this.directives);
         } else if (node instanceof AST_Directive && !this.directives[node.value]) {
@@ -989,9 +871,8 @@ TreeWalker.prototype = {
         }
         this.stack.push(node);
     },
-    pop: function(node) {
+    pop: function() {
-        this.stack.pop();
+        if (this.stack.pop() instanceof AST_Lambda) {
-        if (node instanceof AST_Lambda) {
             this.directives = Object.getPrototypeOf(this.directives);
         }
     },
@@ -1035,16 +916,16 @@ TreeWalker.prototype = {
             self = p;
         }
     },
-    loopcontrol_target: function(label) {
+    loopcontrol_target: function(node) {
         var stack = this.stack;
-        if (label) for (var i = stack.length; --i >= 0;) {
+        if (node.label) for (var i = stack.length; --i >= 0;) {
             var x = stack[i];
-            if (x instanceof AST_LabeledStatement && x.label.name == label.name) {
+            if (x instanceof AST_LabeledStatement && x.label.name == node.label.name)
                 return x.body;
-            }
         } else for (var i = stack.length; --i >= 0;) {
             var x = stack[i];
-            if (x instanceof AST_Switch || x instanceof AST_IterationStatement)
+            if (x instanceof AST_IterationStatement
+                || node instanceof AST_Break && x instanceof AST_Switch)
                 return x;
         }
     }

lib/minify.js

@@ -0,0 +1,218 @@
+"use strict";
+
+var to_ascii = typeof atob == "undefined" ? function(b64) {
+    return new Buffer(b64, "base64").toString();
+} : atob;
+var to_base64 = typeof btoa == "undefined" ? function(str) {
+    return new Buffer(str).toString("base64");
+} : btoa;
+
+function read_source_map(code) {
+    var match = /\n\/\/# sourceMappingURL=data:application\/json(;.*?)?;base64,(.*)/.exec(code);
+    if (!match) {
+        AST_Node.warn("inline source map not found");
+        return null;
+    }
+    return to_ascii(match[2]);
+}
+
+function set_shorthand(name, options, keys) {
+    if (options[name]) {
+        keys.forEach(function(key) {
+            if (options[key]) {
+                if (typeof options[key] != "object") options[key] = {};
+                if (!(name in options[key])) options[key][name] = options[name];
+            }
+        });
+    }
+}
+
+function init_cache(cache) {
+    if (!cache) return;
+    if (!("cname" in cache)) cache.cname = -1;
+    if (!("props" in cache)) {
+        cache.props = new Dictionary();
+    } else if (!(cache.props instanceof Dictionary)) {
+        cache.props = Dictionary.fromObject(cache.props);
+    }
+}
+
+function to_json(cache) {
+    return {
+        cname: cache.cname,
+        props: cache.props.toObject()
+    };
+}
+
+function minify(files, options) {
+    var warn_function = AST_Node.warn_function;
+    try {
+        options = defaults(options, {
+            compress: {},
+            ie8: false,
+            keep_fnames: false,
+            mangle: {},
+            nameCache: null,
+            output: {},
+            parse: {},
+            sourceMap: false,
+            timings: false,
+            toplevel: false,
+            warnings: false,
+            wrap: false,
+        }, true);
+        var timings = options.timings && {
+            start: Date.now()
+        };
+        set_shorthand("ie8", options, [ "compress", "mangle", "output" ]);
+        set_shorthand("keep_fnames", options, [ "compress", "mangle" ]);
+        set_shorthand("toplevel", options, [ "compress", "mangle" ]);
+        set_shorthand("warnings", options, [ "compress" ]);
+        var quoted_props;
+        if (options.mangle) {
+            options.mangle = defaults(options.mangle, {
+                cache: options.nameCache && (options.nameCache.vars || {}),
+                eval: false,
+                ie8: false,
+                keep_fnames: false,
+                properties: false,
+                reserved: [],
+                toplevel: false,
+            }, true);
+            if (options.mangle.properties) {
+                if (typeof options.mangle.properties != "object") {
+                    options.mangle.properties = {};
+                }
+                if (options.mangle.properties.keep_quoted) {
+                    quoted_props = options.mangle.properties.reserved;
+                    if (!Array.isArray(quoted_props)) quoted_props = [];
+                    options.mangle.properties.reserved = quoted_props;
+                }
+                if (options.nameCache && !("cache" in options.mangle.properties)) {
+                    options.mangle.properties.cache = options.nameCache.props || {};
+                }
+            }
+            init_cache(options.mangle.cache);
+            init_cache(options.mangle.properties.cache);
+        }
+        if (options.sourceMap) {
+            options.sourceMap = defaults(options.sourceMap, {
+                content: null,
+                filename: null,
+                includeSources: false,
+                root: null,
+                url: null,
+            }, true);
+        }
+        var warnings = [];
+        if (options.warnings && !AST_Node.warn_function) {
+            AST_Node.warn_function = function(warning) {
+                warnings.push(warning);
+            };
+        }
+        if (timings) timings.parse = Date.now();
+        var toplevel;
+        if (files instanceof AST_Toplevel) {
+            toplevel = files;
+        } else {
+            if (typeof files == "string") {
+                files = [ files ];
+            }
+            options.parse = options.parse || {};
+            options.parse.toplevel = null;
+            for (var name in files) if (HOP(files, name)) {
+                options.parse.filename = name;
+                options.parse.toplevel = parse(files[name], options.parse);
+                if (options.sourceMap && options.sourceMap.content == "inline") {
+                    if (Object.keys(files).length > 1)
+                        throw new Error("inline source map only works with singular input");
+                    options.sourceMap.content = read_source_map(files[name]);
+                }
+            }
+            toplevel = options.parse.toplevel;
+        }
+        if (quoted_props) {
+            reserve_quoted_keys(toplevel, quoted_props);
+        }
+        if (options.wrap) {
+            toplevel = toplevel.wrap_commonjs(options.wrap);
+        }
+        if (timings) timings.compress = Date.now();
+        if (options.compress) toplevel = new Compressor(options.compress).compress(toplevel);
+        if (timings) timings.scope = Date.now();
+        if (options.mangle) toplevel.figure_out_scope(options.mangle);
+        if (timings) timings.mangle = Date.now();
+        if (options.mangle) {
+            base54.reset();
+            toplevel.compute_char_frequency(options.mangle);
+            toplevel.mangle_names(options.mangle);
+        }
+        if (timings) timings.properties = Date.now();
+        if (options.mangle && options.mangle.properties) {
+            toplevel = mangle_properties(toplevel, options.mangle.properties);
+        }
+        if (timings) timings.output = Date.now();
+        var result = {};
+        if (options.output.ast) {
+            result.ast = toplevel;
+        }
+        if (!HOP(options.output, "code") || options.output.code) {
+            if (options.sourceMap) {
+                if (typeof options.sourceMap.content == "string") {
+                    options.sourceMap.content = JSON.parse(options.sourceMap.content);
+                }
+                options.output.source_map = SourceMap({
+                    file: options.sourceMap.filename,
+                    orig: options.sourceMap.content,
+                    root: options.sourceMap.root
+                });
+                if (options.sourceMap.includeSources) {
+                    if (files instanceof AST_Toplevel) {
+                        throw new Error("original source content unavailable");
+                    } else for (var name in files) if (HOP(files, name)) {
+                        options.output.source_map.get().setSourceContent(name, files[name]);
+                    }
+                }
+            }
+            delete options.output.ast;
+            delete options.output.code;
+            var stream = OutputStream(options.output);
+            toplevel.print(stream);
+            result.code = stream.get();
+            if (options.sourceMap) {
+                result.map = options.output.source_map.toString();
+                if (options.sourceMap.url == "inline") {
+                    result.code += "\n//# sourceMappingURL=data:application/json;charset=utf-8;base64," + to_base64(result.map);
+                } else if (options.sourceMap.url) {
+                    result.code += "\n//# sourceMappingURL=" + options.sourceMap.url;
+                }
+            }
+        }
+        if (options.nameCache && options.mangle) {
+            if (options.mangle.cache) options.nameCache.vars = to_json(options.mangle.cache);
+            if (options.mangle.properties && options.mangle.properties.cache) {
+                options.nameCache.props = to_json(options.mangle.properties.cache);
+            }
+        }
+        if (timings) {
+            timings.end = Date.now();
+            result.timings = {
+                parse: 1e-3 * (timings.compress - timings.parse),
+                compress: 1e-3 * (timings.scope - timings.compress),
+                scope: 1e-3 * (timings.mangle - timings.scope),
+                mangle: 1e-3 * (timings.properties - timings.mangle),
+                properties: 1e-3 * (timings.output - timings.properties),
+                output: 1e-3 * (timings.end - timings.output),
+                total: 1e-3 * (timings.end - timings.start)
+            }
+        }
+        if (warnings.length) {
+            result.warnings = warnings;
+        }
+        return result;
+    } catch (ex) {
+        return { error: ex };
+    } finally {
+        AST_Node.warn_function = warn_function;
+    }
+}

lib/mozilla-ast.js

@@ -111,23 +111,19 @@
         },
         Property: function(M) {
             var key = M.key;
-            var name = key.type == "Identifier" ? key.name : key.value;
             var args = {
                 start    : my_start_token(key),
                 end      : my_end_token(M.value),
-                key      : name,
+                key      : key.type == "Identifier" ? key.name : key.value,
                 value    : from_moz(M.value)
             };
-            switch (M.kind) {
+            if (M.kind == "init") return new AST_ObjectKeyVal(args);
-              case "init":
+            args.key = new AST_SymbolAccessor({
-                return new AST_ObjectKeyVal(args);
+                name: args.key
-              case "set":
+            });
-                args.value.name = from_moz(key);
+            args.value = new AST_Accessor(args.value);
-                return new AST_ObjectSetter(args);
+            if (M.kind == "get") return new AST_ObjectGetter(args);
-              case "get":
+            if (M.kind == "set") return new AST_ObjectSetter(args);
-                args.value.name = from_moz(key);
-                return new AST_ObjectGetter(args);
-            }
         },
         ArrayExpression: function(M) {
             return new AST_Array({
@@ -149,7 +145,11 @@
             });
         },
         SequenceExpression: function(M) {
-            return AST_Seq.from_array(M.expressions.map(from_moz));
+            return new AST_Sequence({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                expressions: M.expressions.map(from_moz)
+            });
         },
         MemberExpression: function(M) {
             return new (M.computed ? AST_Sub : AST_Dot)({
@@ -168,7 +168,7 @@
             });
         },
         VariableDeclaration: function(M) {
-            return new (M.kind === "const" ? AST_Const : AST_Var)({
+            return new AST_Var({
                 start       : my_start_token(M),
                 end         : my_end_token(M),
                 definitions : M.declarations.map(from_moz)
@@ -204,7 +204,7 @@
         Identifier: function(M) {
             var p = FROM_MOZ_STACK[FROM_MOZ_STACK.length - 2];
             return new (  p.type == "LabeledStatement" ? AST_Label
-                        : p.type == "VariableDeclarator" && p.id === M ? (p.kind == "const" ? AST_SymbolConst : AST_SymbolVar)
+                        : p.type == "VariableDeclarator" && p.id === M ? AST_SymbolVar
                         : p.type == "FunctionExpression" ? (p.id === M ? AST_SymbolLambda : AST_SymbolFunarg)
                         : p.type == "FunctionDeclaration" ? (p.id === M ? AST_SymbolDefun : AST_SymbolFunarg)
                         : p.type == "CatchClause" ? AST_SymbolCatch
@@ -256,10 +256,7 @@
     map("CallExpression", AST_Call, "callee>expression, arguments@args");
 
     def_to_moz(AST_Toplevel, function To_Moz_Program(M) {
-        return {
+        return to_moz_scope("Program", M);
-            type: "Program",
-            body: M.body.map(to_moz)
-        };
     });
 
     def_to_moz(AST_Defun, function To_Moz_FunctionDeclaration(M) {
@@ -267,7 +264,7 @@
             type: "FunctionDeclaration",
             id: to_moz(M.name),
             params: M.argnames.map(to_moz),
-            body: to_moz_block(M)
+            body: to_moz_scope("BlockStatement", M)
         }
     });
 
@@ -276,7 +273,7 @@
             type: "FunctionExpression",
             id: to_moz(M.name),
             params: M.argnames.map(to_moz),
-            body: to_moz_block(M)
+            body: to_moz_scope("BlockStatement", M)
         }
     });
 
@@ -327,15 +324,15 @@
     def_to_moz(AST_Definitions, function To_Moz_VariableDeclaration(M) {
         return {
             type: "VariableDeclaration",
-            kind: M instanceof AST_Const ? "const" : "var",
+            kind: "var",
             declarations: M.definitions.map(to_moz)
         };
     });
 
-    def_to_moz(AST_Seq, function To_Moz_SequenceExpression(M) {
+    def_to_moz(AST_Sequence, function To_Moz_SequenceExpression(M) {
         return {
             type: "SequenceExpression",
-            expressions: M.to_array().map(to_moz)
+            expressions: M.expressions.map(to_moz)
         };
     });
 
@@ -382,11 +379,10 @@
     });
 
     def_to_moz(AST_ObjectProperty, function To_Moz_Property(M) {
-        var key = (
+        var key = {
-            is_identifier(M.key)
+            type: "Literal",
-            ? {type: "Identifier", name: M.key}
+            value: M.key instanceof AST_SymbolAccessor ? M.key.name : M.key
-            : {type: "Literal", value: M.key}
+        };
-        );
         var kind;
         if (M instanceof AST_ObjectKeyVal) {
             kind = "init";
@@ -547,8 +543,8 @@
         moz_to_me = new Function("U2", "my_start_token", "my_end_token", "from_moz", "return(" + moz_to_me + ")")(
             exports, my_start_token, my_end_token, from_moz
         );
-        me_to_moz = new Function("to_moz", "to_moz_block", "return(" + me_to_moz + ")")(
+        me_to_moz = new Function("to_moz", "to_moz_block", "to_moz_scope", "return(" + me_to_moz + ")")(
-            to_moz, to_moz_block
+            to_moz, to_moz_block, to_moz_scope
         );
         MOZ_TO_ME[moztype] = moz_to_me;
         def_to_moz(mytype, me_to_moz);
@@ -606,4 +602,14 @@
         };
     };
 
+    function to_moz_scope(type, node) {
+        var body = node.body.map(to_moz);
+        if (node.body[0] instanceof AST_SimpleStatement && node.body[0].body instanceof AST_String) {
+            body.unshift(to_moz(new AST_EmptyStatement(node.body[0])));
+        }
+        return {
+            type: type,
+            body: body
+        };
+    };
 })();

lib/output.js

@@ -53,26 +53,25 @@ function is_some_comments(comment) {
 function OutputStream(options) {
 
     options = defaults(options, {
-        indent_start     : 0,
-        indent_level     : 4,
-        quote_keys       : false,
-        space_colon      : true,
         ascii_only       : false,
-        unescape_regexps : false,
-        inline_script    : false,
-        width            : 80,
-        max_line_len     : false,
         beautify         : false,
-        source_map       : null,
         bracketize       : false,
-        semicolons       : true,
         comments         : false,
-        shebang          : true,
+        ie8              : false,
-        preserve_line    : false,
+        indent_level     : 4,
-        screw_ie8        : true,
+        indent_start     : 0,
-        preamble         : null,
+        inline_script    : true,
-        quote_style      : 0,
         keep_quoted_props: false,
+        max_line_len     : false,
+        preamble         : null,
+        preserve_line    : false,
+        quote_keys       : false,
+        quote_style      : 0,
+        semicolons       : true,
+        shebang          : true,
+        source_map       : null,
+        webkit           : false,
+        width            : 80,
         wrap_iife        : false,
     }, true);
 
@@ -110,7 +109,7 @@ function OutputStream(options) {
     var current_pos = 0;
     var OUTPUT = "";
 
-    function to_ascii(str, identifier) {
+    var to_utf8 = options.ascii_only ? function(str, identifier) {
         return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function(ch) {
             var code = ch.charCodeAt(0).toString(16);
             if (code.length <= 2 && !identifier) {
@@ -121,6 +120,12 @@ function OutputStream(options) {
                 return "\\u" + code;
             }
         });
+    } : function(str) {
+        return str.replace(/[\ud800-\udbff](?![\udc00-\udfff])/g, function(ch) {
+            return "\\u" + ch.charCodeAt(0).toString(16);
+        }).replace(/(^|[^\ud800-\udbff])([\udc00-\udfff])/g, function(match, prefix, ch) {
+            return prefix + "\\u" + ch.charCodeAt(0).toString(16);
+        });
     };
 
     function make_string(str, quote) {
@@ -136,12 +141,12 @@ function OutputStream(options) {
               case "\t": return "\\t";
               case "\b": return "\\b";
               case "\f": return "\\f";
-              case "\x0B": return options.screw_ie8 ? "\\v" : "\\x0B";
+              case "\x0B": return options.ie8 ? "\\x0B" : "\\v";
               case "\u2028": return "\\u2028";
               case "\u2029": return "\\u2029";
               case "\ufeff": return "\\ufeff";
               case "\0":
-                  return /[0-7]/.test(str.charAt(i+1)) ? "\\x00" : "\\0";
+                  return /[0-9]/.test(str.charAt(i+1)) ? "\\x00" : "\\0";
             }
             return s;
         });
@@ -151,7 +156,7 @@ function OutputStream(options) {
         function quote_double() {
             return '"' + str.replace(/\x22/g, '\\"') + '"';
         }
-        if (options.ascii_only) str = to_ascii(str);
+        str = to_utf8(str);
         switch (options.quote_style) {
           case 1:
             return quote_single();
@@ -176,8 +181,7 @@ function OutputStream(options) {
 
     function make_name(name) {
         name = name.toString();
-        if (options.ascii_only)
+        name = to_utf8(name, true);
-            name = to_ascii(name, true);
         return name;
     };
 
@@ -190,17 +194,44 @@ function OutputStream(options) {
     var might_need_space = false;
     var might_need_semicolon = false;
     var might_add_newline = 0;
-    var last = null;
+    var last = "";
+    var mapping_token, mapping_name, mappings = options.source_map && [];
 
-    function last_char() {
+    var do_add_mapping = mappings ? function() {
-        return last.charAt(last.length - 1);
+        mappings.forEach(function(mapping) {
-    };
+            try {
+                options.source_map.add(
+                    mapping.token.file,
+                    mapping.line, mapping.col,
+                    mapping.token.line, mapping.token.col,
+                    !mapping.name && mapping.token.type == "name" ? mapping.token.value : mapping.name
+                );
+            } catch(ex) {
+                AST_Node.warn("Couldn't figure out mapping for {file}:{line},{col} → {cline},{ccol} [{name}]", {
+                    file: mapping.token.file,
+                    line: mapping.token.line,
+                    col: mapping.token.col,
+                    cline: mapping.line,
+                    ccol: mapping.col,
+                    name: mapping.name || ""
+                })
+            }
+        });
+        mappings = [];
+    } : noop;
 
     var ensure_line_len = options.max_line_len ? function() {
         if (current_col > options.max_line_len) {
             if (might_add_newline) {
                 var left = OUTPUT.slice(0, might_add_newline);
                 var right = OUTPUT.slice(might_add_newline);
+                if (mappings) {
+                    var delta = right.length - current_col;
+                    mappings.forEach(function(mapping) {
+                        mapping.line++;
+                        mapping.col += delta;
+                    });
+                }
                 OUTPUT = left + "\n" + right;
                 current_line++;
                 current_pos++;
@@ -210,7 +241,10 @@ function OutputStream(options) {
                 AST_Node.warn("Output exceeds {max_line_len} characters", options);
             }
         }
-        might_add_newline = 0;
+        if (might_add_newline) {
+            might_add_newline = 0;
+            do_add_mapping();
+        }
     } : noop;
 
     var requireSemicolonChars = makePredicate("( [ + * / - , .");
@@ -218,10 +252,11 @@ function OutputStream(options) {
     function print(str) {
         str = String(str);
         var ch = str.charAt(0);
+        var prev = last.charAt(last.length - 1);
         if (might_need_semicolon) {
             might_need_semicolon = false;
 
-            if ((!ch || ";}".indexOf(ch) < 0) && !/[;]$/.test(last)) {
+            if (prev == ":" && ch == "}" || (!ch || ";}".indexOf(ch) < 0) && prev != ";") {
                 if (options.semicolons || requireSemicolonChars(ch)) {
                     OUTPUT += ";";
                     current_col++;
@@ -258,7 +293,6 @@ function OutputStream(options) {
         }
 
         if (might_need_space) {
-            var prev = last_char();
             if ((is_identifier_char(prev)
                     && (is_identifier_char(ch) || ch == "\\"))
                 || (ch == "/" && ch == prev)
@@ -270,6 +304,18 @@ function OutputStream(options) {
             }
             might_need_space = false;
         }
+
+        if (mapping_token) {
+            mappings.push({
+                token: mapping_token,
+                name: mapping_name,
+                line: current_line,
+                col: current_col
+            });
+            mapping_token = false;
+            if (!might_add_newline) do_add_mapping();
+        }
+
         OUTPUT += str;
         current_pos += str.length;
         var a = str.split(/\r?\n/), n = a.length - 1;
@@ -361,27 +407,12 @@ function OutputStream(options) {
 
     function colon() {
         print(":");
-        if (options.space_colon) space();
+        space();
     };
 
-    var add_mapping = options.source_map ? function(token, name) {
+    var add_mapping = mappings ? function(token, name) {
-        try {
+        mapping_token = token;
-            if (token) options.source_map.add(
+        mapping_name = name;
-                token.file || "?",
-                current_line, current_col,
-                token.line, token.col,
-                (!name && token.type == "name") ? token.value : name
-            );
-        } catch(ex) {
-            AST_Node.warn("Couldn't figure out mapping for {file}:{line},{col} → {cline},{ccol} [{name}]", {
-                file: token.file,
-                line: token.line,
-                col: token.col,
-                cline: current_line,
-                ccol: current_col,
-                name: name || ""
-            })
-        }
     } : noop;
 
     function get() {
@@ -407,7 +438,7 @@ function OutputStream(options) {
         last            : function() { return last },
         semicolon       : semicolon,
         force_semicolon : force_semicolon,
-        to_ascii        : to_ascii,
+        to_utf8         : to_utf8,
         print_name      : function(name) { print(make_name(name)) },
         print_string    : function(str, quote, escape_directive) {
             var encoded = encode_string(str, quote);
@@ -451,13 +482,17 @@ function OutputStream(options) {
         nodetype.DEFMETHOD("_codegen", generator);
     };
 
-    var use_asm = false;
     var in_directive = false;
+    var active_scope = null;
+    var use_asm = null;
 
     AST_Node.DEFMETHOD("print", function(stream, force_parens){
-        var self = this, generator = self._codegen, prev_use_asm = use_asm;
+        var self = this, generator = self._codegen;
-        if (self instanceof AST_Directive && self.value == "use asm" && stream.parent() instanceof AST_Scope) {
+        if (self instanceof AST_Scope) {
-            use_asm = true;
+            active_scope = self;
+        }
+        else if (!use_asm && self instanceof AST_Directive && self.value == "use asm") {
+            use_asm = active_scope;
         }
         function doit() {
             self.add_comments(stream);
@@ -471,10 +506,11 @@ function OutputStream(options) {
             doit();
         }
         stream.pop_node();
-        if (self instanceof AST_Scope) {
+        if (self === use_asm) {
-            use_asm = prev_use_asm;
+            use_asm = null;
         }
     });
+    AST_Node.DEFMETHOD("_print", AST_Node.prototype.print);
 
     AST_Node.DEFMETHOD("print_to_string", function(options){
         var s = OutputStream(options);
@@ -510,8 +546,8 @@ function OutputStream(options) {
                 }));
             }
 
-            if (comments.length > 0 && output.pos() == 0) {
+            if (output.pos() == 0) {
-                if (output.option("shebang") && comments[0].type == "comment5") {
+                if (comments.length > 0 && output.option("shebang") && comments[0].type == "comment5") {
                     output.print("#!" + comments.shift().value + "\n");
                     output.indent();
                 }
@@ -572,6 +608,13 @@ function OutputStream(options) {
             return true;
         }
 
+        if (output.option('webkit')) {
+            var p = output.parent();
+            if (p instanceof AST_PropAccess && p.expression === this) {
+                return true;
+            }
+        }
+
         if (output.option('wrap_iife')) {
             var p = output.parent();
             return p instanceof AST_Call && p.expression === this;
@@ -586,13 +629,13 @@ function OutputStream(options) {
         return first_in_statement(output);
     });
 
-    PARENS([ AST_Unary, AST_Undefined ], function(output){
+    PARENS(AST_Unary, function(output){
         var p = output.parent();
         return p instanceof AST_PropAccess && p.expression === this
             || p instanceof AST_Call && p.expression === this;
     });
 
-    PARENS(AST_Seq, function(output){
+    PARENS(AST_Sequence, function(output){
         var p = output.parent();
         return p instanceof AST_Call             // (foo, bar)() or foo(1, (2, 3), 4)
             || p instanceof AST_Unary            // !(foo, bar, baz)
@@ -638,14 +681,15 @@ function OutputStream(options) {
             // parens around it too, otherwise the call will be
             // interpreted as passing the arguments to the upper New
             // expression.
-            try {
+            var parens = false;
-                this.walk(new TreeWalker(function(node){
+            this.walk(new TreeWalker(function(node) {
-                    if (node instanceof AST_Call) throw p;
+                if (parens || node instanceof AST_Scope) return true;
-                }));
+                if (node instanceof AST_Call) {
-            } catch(ex) {
+                    parens = true;
-                if (ex !== p) throw ex;
+                    return true;
-                return true;
+                }
-            }
+            }));
+            return parens;
         }
     });
 
@@ -681,7 +725,7 @@ function OutputStream(options) {
         }
     });
 
-    PARENS([ AST_Assign, AST_Conditional ], function (output){
+    PARENS([ AST_Assign, AST_Conditional ], function(output){
         var p = output.parent();
         // !(a = false) → true
         if (p instanceof AST_Unary)
@@ -906,7 +950,7 @@ function OutputStream(options) {
     function make_then(self, output) {
         var b = self.body;
         if (output.option("bracketize")
-            || !output.option("screw_ie8") && b instanceof AST_Do)
+            || output.option("ie8") && b instanceof AST_Do)
             return make_block(b, output);
         // The squeezer replaces "block"-s that contain only a single
         // statement with the statement itself; technically, the AST
@@ -960,24 +1004,24 @@ function OutputStream(options) {
             self.expression.print(output);
         });
         output.space();
-        if (self.body.length > 0) output.with_block(function(){
+        var last = self.body.length - 1;
-            self.body.forEach(function(stmt, i){
+        if (last < 0) output.print("{}");
-                if (i) output.newline();
+        else output.with_block(function(){
+            self.body.forEach(function(branch, i){
                 output.indent(true);
-                stmt.print(output);
+                branch.print(output);
+                if (i < last && branch.body.length > 0)
+                    output.newline();
             });
         });
-        else output.print("{}");
     });
     AST_SwitchBranch.DEFMETHOD("_do_print_body", function(output){
-        if (this.body.length > 0) {
+        output.newline();
+        this.body.forEach(function(stmt){
+            output.indent();
+            stmt.print(output);
             output.newline();
-            this.body.forEach(function(stmt){
+        });
-                output.indent();
-                stmt.print(output);
-                output.newline();
-            });
-        }
     });
     DEFPRINT(AST_Default, function(self, output){
         output.print("default:");
@@ -1037,24 +1081,19 @@ function OutputStream(options) {
     DEFPRINT(AST_Var, function(self, output){
         self._do_print(output, "var");
     });
-    DEFPRINT(AST_Const, function(self, output){
-        self._do_print(output, "const");
-    });
 
     function parenthesize_for_noin(node, output, noin) {
-        if (!noin) node.print(output);
+        var parens = false;
-        else try {
+        // need to take some precautions here:
-            // need to take some precautions here:
+        //    https://github.com/mishoo/UglifyJS2/issues/60
-            //    https://github.com/mishoo/UglifyJS2/issues/60
+        if (noin) node.walk(new TreeWalker(function(node) {
-            node.walk(new TreeWalker(function(node){
+            if (parens || node instanceof AST_Scope) return true;
-                if (node instanceof AST_Binary && node.operator == "in")
+            if (node instanceof AST_Binary && node.operator == "in") {
-                    throw output;
+                parens = true;
-            }));
+                return true;
-            node.print(output);
+            }
-        } catch(ex) {
+        }));
-            if (ex !== output) throw ex;
+        node.print(output, parens);
-            node.print(output, true);
-        }
     };
 
     DEFPRINT(AST_VarDef, function(self, output){
@@ -1074,6 +1113,9 @@ function OutputStream(options) {
         self.expression.print(output);
         if (self instanceof AST_New && !need_constructor_parens(self, output))
             return;
+        if (self.expression instanceof AST_Call || self.expression instanceof AST_Lambda) {
+            output.add_mapping(self.start);
+        }
         output.with_parens(function(){
             self.args.forEach(function(expr, i){
                 if (i) output.comma();
@@ -1087,18 +1129,19 @@ function OutputStream(options) {
         AST_Call.prototype._codegen(self, output);
     });
 
-    AST_Seq.DEFMETHOD("_do_print", function(output){
+    AST_Sequence.DEFMETHOD("_do_print", function(output){
-        this.car.print(output);
+        this.expressions.forEach(function(node, index) {
-        if (this.cdr) {
+            if (index > 0) {
-            output.comma();
+                output.comma();
-            if (output.should_break()) {
+                if (output.should_break()) {
-                output.newline();
+                    output.newline();
-                output.indent();
+                    output.indent();
+                }
             }
-            this.cdr.print(output);
+            node.print(output);
-        }
+        });
     });
-    DEFPRINT(AST_Seq, function(self, output){
+    DEFPRINT(AST_Sequence, function(self, output){
         self._do_print(output);
         // var p = output.parent();
         // if (p instanceof AST_Statement) {
@@ -1112,15 +1155,23 @@ function OutputStream(options) {
     DEFPRINT(AST_Dot, function(self, output){
         var expr = self.expression;
         expr.print(output);
-        if (expr instanceof AST_Number && expr.getValue() >= 0) {
+        var prop = self.property;
-            if (!/[xa-f.)]/i.test(output.last())) {
+        if (output.option("ie8") && RESERVED_WORDS(prop)) {
-                output.print(".");
+            output.print("[");
+            output.add_mapping(self.end);
+            output.print_string(prop);
+            output.print("]");
+        } else {
+            if (expr instanceof AST_Number && expr.getValue() >= 0) {
+                if (!/[xa-f.)]/i.test(output.last())) {
+                    output.print(".");
+                }
             }
+            output.print(".");
+            // the name after dot would be mapped about here.
+            output.add_mapping(self.end);
+            output.print_name(prop);
         }
-        output.print(".");
-        // the name after dot would be mapped about here.
-        output.add_mapping(self.end);
-        output.print_name(self.property);
     });
     DEFPRINT(AST_Sub, function(self, output){
         self.expression.print(output);
@@ -1211,9 +1262,8 @@ function OutputStream(options) {
         });
         else output.print("{}");
     });
-    DEFPRINT(AST_ObjectKeyVal, function(self, output){
+
-        var key = self.key;
+    function print_property_name(key, quote, output) {
-        var quote = self.quote;
         if (output.option("quote_keys")) {
             output.print_string(key + "");
         } else if ((typeof key == "number"
@@ -1221,7 +1271,7 @@ function OutputStream(options) {
                     && +key + "" == key)
                    && parseFloat(key) >= 0) {
             output.print(make_num(key));
-        } else if (RESERVED_WORDS(key) ? output.option("screw_ie8") : is_identifier_string(key)) {
+        } else if (RESERVED_WORDS(key) ? !output.option("ie8") : is_identifier_string(key)) {
             if (quote && output.option("keep_quoted_props")) {
                 output.print_string(key, quote);
             } else {
@@ -1230,35 +1280,30 @@ function OutputStream(options) {
         } else {
             output.print_string(key, quote);
         }
+    }
+
+    DEFPRINT(AST_ObjectKeyVal, function(self, output){
+        print_property_name(self.key, self.quote, output);
         output.colon();
         self.value.print(output);
     });
-    DEFPRINT(AST_ObjectSetter, function(self, output){
+    AST_ObjectProperty.DEFMETHOD("_print_getter_setter", function(type, output) {
-        output.print("set");
+        output.print(type);
         output.space();
-        self.key.print(output);
+        print_property_name(this.key.name, this.quote, output);
-        self.value._do_print(output, true);
+        this.value._do_print(output, true);
+    });
+    DEFPRINT(AST_ObjectSetter, function(self, output){
+        self._print_getter_setter("set", output);
     });
     DEFPRINT(AST_ObjectGetter, function(self, output){
-        output.print("get");
+        self._print_getter_setter("get", output);
-        output.space();
-        self.key.print(output);
-        self.value._do_print(output, true);
     });
     DEFPRINT(AST_Symbol, function(self, output){
         var def = self.definition();
         output.print_name(def ? def.mangled_name || def.name : self.name);
     });
-    DEFPRINT(AST_Undefined, function(self, output){
-        output.print("void 0");
-    });
     DEFPRINT(AST_Hole, noop);
-    DEFPRINT(AST_Infinity, function(self, output){
-        output.print("Infinity");
-    });
-    DEFPRINT(AST_NaN, function(self, output){
-        output.print("NaN");
-    });
     DEFPRINT(AST_This, function(self, output){
         output.print("this");
     });
@@ -1276,46 +1321,13 @@ function OutputStream(options) {
         }
     });
 
-    function regexp_safe_literal(code) {
-        return [
-            0x5c   , // \
-            0x2f   , // /
-            0x2e   , // .
-            0x2b   , // +
-            0x2a   , // *
-            0x3f   , // ?
-            0x28   , // (
-            0x29   , // )
-            0x5b   , // [
-            0x5d   , // ]
-            0x7b   , // {
-            0x7d   , // }
-            0x24   , // $
-            0x5e   , // ^
-            0x3a   , // :
-            0x7c   , // |
-            0x21   , // !
-            0x0a   , // \n
-            0x0d   , // \r
-            0x00   , // \0
-            0xfeff , // Unicode BOM
-            0x2028 , // unicode "line separator"
-            0x2029 , // unicode "paragraph separator"
-        ].indexOf(code) < 0;
-    };
-
     DEFPRINT(AST_RegExp, function(self, output){
-        var str = self.getValue().toString();
+        var regexp = self.getValue();
-        if (output.option("ascii_only")) {
+        var str = regexp.toString();
-            str = output.to_ascii(str);
+        if (regexp.raw_source) {
-        } else if (output.option("unescape_regexps")) {
+            str = "/" + regexp.raw_source + str.slice(str.lastIndexOf("/"));
-            str = str.split("\\\\").map(function(str){
-                return str.replace(/\\u[0-9a-fA-F]{4}|\\x[0-9a-fA-F]{2}/g, function(s){
-                    var code = parseInt(s.substr(2), 16);
-                    return regexp_safe_literal(code) ? String.fromCharCode(code) : s;
-                });
-            }).join("\\\\");
         }
+        str = output.to_utf8(str);
         output.print(str);
         var p = output.parent();
         if (p instanceof AST_Binary && /^in/.test(p.operator) && p.left === self)

lib/parse.js

@@ -111,12 +111,10 @@ var WHITESPACE_CHARS = makePredicate(characters(" \u00a0\n\r\t\f\u000b\u200b\u20
 
 var NEWLINE_CHARS = makePredicate(characters("\n\r\u2028\u2029"));
 
-var PUNC_BEFORE_EXPRESSION = makePredicate(characters("[{(,.;:"));
+var PUNC_BEFORE_EXPRESSION = makePredicate(characters("[{(,;:"));
 
 var PUNC_CHARS = makePredicate(characters("[]{}(),;:"));
 
-var REGEXP_MODIFIERS = makePredicate(characters("gmsiy"));
-
 /* -----[ Tokenizer ]----- */
 
 // regexps adapted from http://xregexp.com/plugins/#unicode
@@ -285,7 +283,11 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         S.regex_allowed = ((type == "operator" && !UNARY_POSTFIX(value)) ||
                            (type == "keyword" && KEYWORDS_BEFORE_EXPRESSION(value)) ||
                            (type == "punc" && PUNC_BEFORE_EXPRESSION(value)));
-        prev_was_dot = (type == "punc" && value == ".");
+        if (type == "punc" && value == ".") {
+            prev_was_dot = true;
+        } else if (!is_comment) {
+            prev_was_dot = false;
+        }
         var ret = {
             type    : type,
             value   : value,
@@ -473,31 +475,33 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         return name;
     };
 
-    var read_regexp = with_eof_error("Unterminated regular expression", function(regexp){
+    var read_regexp = with_eof_error("Unterminated regular expression", function(source) {
         var prev_backslash = false, ch, in_class = false;
         while ((ch = next(true))) if (NEWLINE_CHARS(ch)) {
             parse_error("Unexpected line terminator");
         } else if (prev_backslash) {
-            regexp += "\\" + ch;
+            source += "\\" + ch;
             prev_backslash = false;
         } else if (ch == "[") {
             in_class = true;
-            regexp += ch;
+            source += ch;
         } else if (ch == "]" && in_class) {
             in_class = false;
-            regexp += ch;
+            source += ch;
         } else if (ch == "/" && !in_class) {
             break;
         } else if (ch == "\\") {
             prev_backslash = true;
         } else {
-            regexp += ch;
+            source += ch;
         }
         var mods = read_name();
         try {
-          return token("regexp", new RegExp(regexp, mods));
+            var regexp = new RegExp(source, mods);
+            regexp.raw_source = source;
+            return token("regexp", regexp);
         } catch(e) {
-          parse_error(e.message);
+            parse_error(e.message);
         }
     });
 
@@ -629,8 +633,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
     }
 
     next_token.has_directive = function(directive) {
-        return S.directives[directive] !== undefined &&
+        return S.directives[directive] > 0;
-            S.directives[directive] > 0;
     }
 
     return next_token;
@@ -679,24 +682,21 @@ var PRECEDENCE = (function(a, ret){
     {}
 );
 
-var STATEMENTS_WITH_LABELS = array_to_hash([ "for", "do", "while", "switch" ]);
+var ATOMIC_START_TOKEN = makePredicate([ "atom", "num", "string", "regexp", "name" ]);
-
-var ATOMIC_START_TOKEN = array_to_hash([ "atom", "num", "string", "regexp", "name" ]);
 
 /* -----[ Parser ]----- */
 
 function parse($TEXT, options) {
 
     options = defaults(options, {
-        strict         : false,
-        filename       : null,
-        toplevel       : null,
-        expression     : false,
-        html5_comments : true,
         bare_returns   : false,
+        expression     : false,
+        filename       : null,
+        html5_comments : true,
         shebang        : true,
-        cli            : false,
+        strict         : false,
-    });
+        toplevel       : null,
+    }, true);
 
     var S = {
         input         : (typeof $TEXT == "string"
@@ -803,28 +803,23 @@ function parse($TEXT, options) {
     };
 
     var statement = embed_tokens(function() {
-        var tmp;
         handle_regexp();
         switch (S.token.type) {
           case "string":
-            var dir = false;
+            if (S.in_directives) {
-            if (S.in_directives === true) {
+                var token = peek();
-                if ((is_token(peek(), "punc", ";") || peek().nlb) && S.token.raw.indexOf("\\") === -1) {
+                if (S.token.raw.indexOf("\\") == -1
+                    && (token.nlb
+                        || is_token(token, "eof")
+                        || is_token(token, "punc", ";")
+                        || is_token(token, "punc", "}"))) {
                     S.input.add_directive(S.token.value);
                 } else {
                     S.in_directives = false;
                 }
             }
             var dir = S.in_directives, stat = simple_statement();
-            if (dir) {
+            return dir ? new AST_Directive(stat.body) : stat;
-                return new AST_Directive({
-                    start : stat.body.start,
-                    end   : stat.body.end,
-                    quote : stat.body.quote,
-                    value : stat.body.value,
-                });
-            }
-            return stat;
           case "num":
           case "regexp":
           case "operator":
@@ -856,75 +851,97 @@ function parse($TEXT, options) {
             }
 
           case "keyword":
-            switch (tmp = S.token.value, next(), tmp) {
+            switch (S.token.value) {
               case "break":
+                next();
                 return break_cont(AST_Break);
 
               case "continue":
+                next();
                 return break_cont(AST_Continue);
 
               case "debugger":
+                next();
                 semicolon();
                 return new AST_Debugger();
 
               case "do":
+                next();
+                var body = in_loop(statement);
+                expect_token("keyword", "while");
+                var condition = parenthesised();
+                semicolon(true);
                 return new AST_Do({
-                    body      : in_loop(statement),
+                    body      : body,
-                    condition : (expect_token("keyword", "while"), tmp = parenthesised(), semicolon(true), tmp)
+                    condition : condition
                 });
 
               case "while":
+                next();
                 return new AST_While({
                     condition : parenthesised(),
                     body      : in_loop(statement)
                 });
 
               case "for":
+                next();
                 return for_();
 
               case "function":
+                next();
                 return function_(AST_Defun);
 
               case "if":
+                next();
                 return if_();
 
               case "return":
                 if (S.in_function == 0 && !options.bare_returns)
                     croak("'return' outside of function");
+                next();
+                var value = null;
+                if (is("punc", ";")) {
+                    next();
+                } else if (!can_insert_semicolon()) {
+                    value = expression(true);
+                    semicolon();
+                }
                 return new AST_Return({
-                    value: ( is("punc", ";")
+                    value: value
-                             ? (next(), null)
-                             : can_insert_semicolon()
-                             ? null
-                             : (tmp = expression(true), semicolon(), tmp) )
                 });
 
               case "switch":
+                next();
                 return new AST_Switch({
                     expression : parenthesised(),
                     body       : in_loop(switch_body_)
                 });
 
               case "throw":
+                next();
                 if (S.token.nlb)
                     croak("Illegal newline after 'throw'");
+                var value = expression(true);
+                semicolon();
                 return new AST_Throw({
-                    value: (tmp = expression(true), semicolon(), tmp)
+                    value: value
                 });
 
               case "try":
+                next();
                 return try_();
 
               case "var":
-                return tmp = var_(), semicolon(), tmp;
+                next();
-
+                var node = var_();
-              case "const":
+                semicolon();
-                return tmp = const_(), semicolon(), tmp;
+                return node;
 
               case "with":
                 if (S.input.has_directive("use strict")) {
                     croak("Strict mode may not include a with statement");
                 }
+                next();
                 return new AST_With({
                     expression : parenthesised(),
                     body       : statement()
@@ -993,8 +1010,12 @@ function parse($TEXT, options) {
                 ? (next(), var_(true))
                 : expression(true, true);
             if (is("operator", "in")) {
-                if (init instanceof AST_Var && init.definitions.length > 1)
+                if (init instanceof AST_Var) {
-                    croak("Only one variable declaration allowed in for..in loop");
+                    if (init.definitions.length > 1)
+                        croak("Only one variable declaration allowed in for..in loop", init.start.line, init.start.col, init.start.pos);
+                } else if (!is_assignable(init)) {
+                    croak("Invalid left-hand side in for..in loop", init.start.line, init.start.col, init.start.pos);
+                }
                 next();
                 return for_in(init);
             }
@@ -1033,30 +1054,35 @@ function parse($TEXT, options) {
         var name = is("name") ? as_symbol(in_statement ? AST_SymbolDefun : AST_SymbolLambda) : null;
         if (in_statement && !name)
             unexpected();
+        if (name && ctor !== AST_Accessor && !(name instanceof AST_SymbolDeclaration))
+            unexpected(prev());
         expect("(");
+        var argnames = [];
+        for (var first = true; !is("punc", ")");) {
+            if (first) first = false; else expect(",");
+            argnames.push(as_symbol(AST_SymbolFunarg));
+        }
+        next();
+        var loop = S.in_loop;
+        var labels = S.labels;
+        ++S.in_function;
+        S.in_directives = true;
+        S.input.push_directives_stack();
+        S.in_loop = 0;
+        S.labels = [];
+        var body = block_();
+        if (S.input.has_directive("use strict")) {
+            if (name) strict_verify_symbol(name);
+            argnames.forEach(strict_verify_symbol);
+        }
+        S.input.pop_directives_stack();
+        --S.in_function;
+        S.in_loop = loop;
+        S.labels = labels;
         return new ctor({
             name: name,
-            argnames: (function(first, a){
+            argnames: argnames,
-                while (!is("punc", ")")) {
+            body: body
-                    if (first) first = false; else expect(",");
-                    a.push(as_symbol(AST_SymbolFunarg));
-                }
-                next();
-                return a;
-            })(true, []),
-            body: (function(loop, labels){
-                ++S.in_function;
-                S.in_directives = true;
-                S.input.push_directives_stack();
-                S.in_loop = 0;
-                S.labels = [];
-                var a = block_();
-                S.input.pop_directives_stack();
-                --S.in_function;
-                S.in_loop = loop;
-                S.labels = labels;
-                return a;
-            })(S.in_loop, S.labels)
         });
     };
 
@@ -1152,12 +1178,12 @@ function parse($TEXT, options) {
         });
     };
 
-    function vardefs(no_in, in_const) {
+    function vardefs(no_in) {
         var a = [];
         for (;;) {
             a.push(new AST_VarDef({
                 start : S.token,
-                name  : as_symbol(in_const ? AST_SymbolConst : AST_SymbolVar),
+                name  : as_symbol(AST_SymbolVar),
                 value : is("operator", "=") ? (next(), expression(false, no_in)) : null,
                 end   : prev()
             }));
@@ -1171,15 +1197,7 @@ function parse($TEXT, options) {
     var var_ = function(no_in) {
         return new AST_Var({
             start       : prev(),
-            definitions : vardefs(no_in, false),
+            definitions : vardefs(no_in),
-            end         : prev()
-        });
-    };
-
-    var const_ = function() {
-        return new AST_Const({
-            start       : prev(),
-            definitions : vardefs(false, true),
             end         : prev()
         });
     };
@@ -1206,7 +1224,6 @@ function parse($TEXT, options) {
         var tok = S.token, ret;
         switch (tok.type) {
           case "name":
-          case "keyword":
             ret = _make_symbol(AST_SymbolRef);
             break;
           case "num":
@@ -1236,13 +1253,6 @@ function parse($TEXT, options) {
                 break;
             }
             break;
-          case "operator":
-            if (!is_identifier_string(tok.value)) {
-                croak("Invalid getter/setter name: " + tok.value,
-                    tok.line, tok.col, tok.pos);
-            }
-            ret = _make_symbol(AST_SymbolRef);
-            break;
         }
         next();
         return ret;
@@ -1276,7 +1286,7 @@ function parse($TEXT, options) {
             func.end = prev();
             return subscripts(func, allow_calls);
         }
-        if (ATOMIC_START_TOKEN[S.token.type]) {
+        if (ATOMIC_START_TOKEN(S.token.type)) {
             return subscripts(as_atom_node(), allow_calls);
         }
         unexpected();
@@ -1320,10 +1330,15 @@ function parse($TEXT, options) {
             var type = start.type;
             var name = as_property_name();
             if (type == "name" && !is("punc", ":")) {
+                var key = new AST_SymbolAccessor({
+                    start: S.token,
+                    name: as_property_name(),
+                    end: prev()
+                });
                 if (name == "get") {
                     a.push(new AST_ObjectGetter({
                         start : start,
-                        key   : as_atom_node(),
+                        key   : key,
                         value : create_accessor(),
                         end   : prev()
                     }));
@@ -1332,7 +1347,7 @@ function parse($TEXT, options) {
                 if (name == "set") {
                     a.push(new AST_ObjectSetter({
                         start : start,
-                        key   : as_atom_node(),
+                        key   : key,
                         value : create_accessor(),
                         end   : prev()
                     }));
@@ -1354,14 +1369,15 @@ function parse($TEXT, options) {
 
     function as_property_name() {
         var tmp = S.token;
-        next();
         switch (tmp.type) {
+          case "operator":
+            if (!KEYWORDS(tmp.value)) unexpected();
           case "num":
           case "string":
           case "name":
-          case "operator":
           case "keyword":
           case "atom":
+            next();
             return tmp.value;
           default:
             unexpected();
@@ -1370,16 +1386,9 @@ function parse($TEXT, options) {
 
     function as_name() {
         var tmp = S.token;
+        if (tmp.type != "name") unexpected();
         next();
-        switch (tmp.type) {
+        return tmp.value;
-          case "name":
-          case "operator":
-          case "keyword":
-          case "atom":
-            return tmp.value;
-          default:
-            unexpected();
-        }
     };
 
     function _make_symbol(type) {
@@ -1391,12 +1400,20 @@ function parse($TEXT, options) {
         });
     };
 
+    function strict_verify_symbol(sym) {
+        if (sym.name == "arguments" || sym.name == "eval")
+            croak("Unexpected " + sym.name + " in strict mode", sym.start.line, sym.start.col, sym.start.pos);
+    }
+
     function as_symbol(type, noerror) {
         if (!is("name")) {
             if (!noerror) croak("Name expected");
             return null;
         }
         var sym = _make_symbol(type);
+        if (S.input.has_directive("use strict") && sym instanceof AST_SymbolDeclaration) {
+            strict_verify_symbol(sym);
+        }
         next();
         return sym;
     };
@@ -1440,14 +1457,14 @@ function parse($TEXT, options) {
         if (is("operator") && UNARY_PREFIX(start.value)) {
             next();
             handle_regexp();
-            var ex = make_unary(AST_UnaryPrefix, start.value, maybe_unary(allow_calls));
+            var ex = make_unary(AST_UnaryPrefix, start, maybe_unary(allow_calls));
             ex.start = start;
             ex.end = prev();
             return ex;
         }
         var val = expr_atom(allow_calls);
         while (is("operator") && UNARY_POSTFIX(S.token.value) && !S.token.nlb) {
-            val = make_unary(AST_UnaryPostfix, S.token.value, val);
+            val = make_unary(AST_UnaryPostfix, S.token, val);
             val.start = start;
             val.end = S.token;
             next();
@@ -1455,9 +1472,19 @@ function parse($TEXT, options) {
         return val;
     };
 
-    function make_unary(ctor, op, expr) {
+    function make_unary(ctor, token, expr) {
-        if ((op == "++" || op == "--") && !is_assignable(expr))
+        var op = token.value;
-            croak("Invalid use of " + op + " operator", null, ctor === AST_UnaryPrefix ? expr.start.col - 1 : null);
+        switch (op) {
+          case "++":
+          case "--":
+            if (!is_assignable(expr))
+                croak("Invalid use of " + op + " operator", token.line, token.col, token.pos);
+            break;
+          case "delete":
+            if (expr instanceof AST_SymbolRef && S.input.has_directive("use strict"))
+                croak("Calling delete on expression not allowed in strict mode", expr.start.line, expr.start.col, expr.start.pos);
+            break;
+        }
         return new ctor({ operator: op, expression: expr });
     };
 
@@ -1502,7 +1529,6 @@ function parse($TEXT, options) {
     };
 
     function is_assignable(expr) {
-        if (options.cli) return true;
         return expr instanceof AST_PropAccess || expr instanceof AST_SymbolRef;
     };
 
@@ -1527,17 +1553,18 @@ function parse($TEXT, options) {
 
     var expression = function(commas, no_in) {
         var start = S.token;
-        var expr = maybe_assign(no_in);
+        var exprs = [];
-        if (commas && is("punc", ",")) {
+        while (true) {
+            exprs.push(maybe_assign(no_in));
+            if (!commas || !is("punc", ",")) break;
             next();
-            return new AST_Seq({
+            commas = true;
-                start  : start,
-                car    : expr,
-                cdr    : expression(true, no_in),
-                end    : peek()
-            });
         }
-        return expr;
+        return exprs.length == 1 ? exprs[0] : new AST_Sequence({
+            start       : start,
+            expressions : exprs,
+            end         : peek()
+        });
     };
 
     function in_loop(cont) {

lib/propmangle.js

@@ -43,8 +43,16 @@
 
 "use strict";
 
-function find_builtins() {
+function find_builtins(reserved) {
-    var a = [];
+    // NaN will be included due to Number.NaN
+    [
+        "null",
+        "true",
+        "false",
+        "Infinity",
+        "-Infinity",
+        "undefined",
+    ].forEach(add);
     [ Object, Array, Function, Number,
       String, Boolean, Error, Math,
       Date, RegExp
@@ -55,24 +63,52 @@ function find_builtins() {
         }
     });
     function add(name) {
-        push_uniq(a, name);
+        push_uniq(reserved, name);
     }
-    return a;
+}
+
+function reserve_quoted_keys(ast, reserved) {
+    function add(name) {
+        push_uniq(reserved, name);
+    }
+
+    ast.walk(new TreeWalker(function(node) {
+        if (node instanceof AST_ObjectKeyVal && node.quote) {
+            add(node.key);
+        } else if (node instanceof AST_Sub) {
+            addStrings(node.property, add);
+        }
+    }));
+}
+
+function addStrings(node, add) {
+    node.walk(new TreeWalker(function(node) {
+        if (node instanceof AST_Sequence) {
+            addStrings(node.expressions[node.expressions.length - 1], add);
+        } else if (node instanceof AST_String) {
+            add(node.value);
+        } else if (node instanceof AST_Conditional) {
+            addStrings(node.consequent, add);
+            addStrings(node.alternative, add);
+        }
+        return true;
+    }));
 }
 
 function mangle_properties(ast, options) {
     options = defaults(options, {
-        reserved : null,
+        builtins: false,
-        cache : null,
+        cache: null,
-        only_cache : false,
+        debug: false,
-        regex : null,
+        keep_quoted: false,
-        ignore_quoted : false,
+        only_cache: false,
-        debug : false
+        regex: null,
-    });
+        reserved: null,
+    }, true);
 
     var reserved = options.reserved;
-    if (reserved == null)
+    if (!Array.isArray(reserved)) reserved = [];
-        reserved = find_builtins();
+    if (!options.builtins) find_builtins(reserved);
 
     var cache = options.cache;
     if (cache == null) {
@@ -83,12 +119,11 @@ function mangle_properties(ast, options) {
     }
 
     var regex = options.regex;
-    var ignore_quoted = options.ignore_quoted;
 
     // note debug is either false (disabled), or a string of the debug suffix to use (enabled).
     // note debug may be enabled as an empty string, which is falsey. Also treat passing 'true'
     // the same as passing an empty string.
-    var debug = (options.debug !== false);
+    var debug = options.debug !== false;
     var debug_name_suffix;
     if (debug) {
         debug_name_suffix = (options.debug === true ? "" : options.debug);
@@ -96,12 +131,11 @@ function mangle_properties(ast, options) {
 
     var names_to_mangle = [];
     var unmangleable = [];
-    var ignored = {};
 
     // step 1: find candidates to mangle
     ast.walk(new TreeWalker(function(node){
         if (node instanceof AST_ObjectKeyVal) {
-            add(node.key, ignore_quoted && node.quote);
+            add(node.key);
         }
         else if (node instanceof AST_ObjectProperty) {
             // setter or getter, since KeyVal is handled above
@@ -111,15 +145,14 @@ function mangle_properties(ast, options) {
             add(node.property);
         }
         else if (node instanceof AST_Sub) {
-            addStrings(node.property, ignore_quoted);
+            addStrings(node.property, add);
         }
     }));
 
     // step 2: transform the tree, renaming properties
     return ast.transform(new TreeTransformer(function(node){
         if (node instanceof AST_ObjectKeyVal) {
-            if (!(ignore_quoted && node.quote))
+            node.key = mangle(node.key);
-                node.key = mangle(node.key);
         }
         else if (node instanceof AST_ObjectProperty) {
             // setter or getter
@@ -128,51 +161,31 @@ function mangle_properties(ast, options) {
         else if (node instanceof AST_Dot) {
             node.property = mangle(node.property);
         }
-        else if (node instanceof AST_Sub) {
+        else if (!options.keep_quoted && node instanceof AST_Sub) {
-            if (!ignore_quoted)
+            node.property = mangleStrings(node.property);
-                node.property = mangleStrings(node.property);
         }
-        // else if (node instanceof AST_String) {
-        //     if (should_mangle(node.value)) {
-        //         AST_Node.warn(
-        //             "Found \"{prop}\" property candidate for mangling in an arbitrary string [{file}:{line},{col}]", {
-        //                 file : node.start.file,
-        //                 line : node.start.line,
-        //                 col  : node.start.col,
-        //                 prop : node.value
-        //             }
-        //         );
-        //     }
-        // }
     }));
 
     // only function declarations after this line
 
     function can_mangle(name) {
-        if (!is_identifier(name)) return false;
         if (unmangleable.indexOf(name) >= 0) return false;
         if (reserved.indexOf(name) >= 0) return false;
         if (options.only_cache) {
             return cache.props.has(name);
         }
-        if (/^[0-9.]+$/.test(name)) return false;
+        if (/^-?[0-9]+(\.[0-9]+)?(e[+-][0-9]+)?$/.test(name)) return false;
         return true;
     }
 
     function should_mangle(name) {
-        if (ignore_quoted && name in ignored) return false;
         if (regex && !regex.test(name)) return false;
         if (reserved.indexOf(name) >= 0) return false;
         return cache.props.has(name)
             || names_to_mangle.indexOf(name) >= 0;
     }
 
-    function add(name, ignore) {
+    function add(name) {
-        if (ignore) {
-            ignored[name] = true;
-            return;
-        }
-
         if (can_mangle(name))
             push_uniq(names_to_mangle, name);
 
@@ -192,19 +205,16 @@ function mangle_properties(ast, options) {
                 // debug mode: use a prefix and suffix to preserve readability, e.g. o.foo -> o._$foo$NNN_.
                 var debug_mangled = "_$" + name + "$" + debug_name_suffix + "_";
 
-                if (can_mangle(debug_mangled) && !(ignore_quoted && debug_mangled in ignored)) {
+                if (can_mangle(debug_mangled)) {
                     mangled = debug_mangled;
                 }
             }
 
             // either debug mode is off, or it is on and we could not use the mangled name
             if (!mangled) {
-                // note can_mangle() does not check if the name collides with the 'ignored' set
-                // (filled with quoted properties when ignore_quoted set). Make sure we add this
-                // check so we don't collide with a quoted name.
                 do {
                     mangled = base54(++cache.cname);
-                } while (!can_mangle(mangled) || (ignore_quoted && mangled in ignored));
+                } while (!can_mangle(mangled));
             }
 
             cache.props.set(name, mangled);
@@ -212,36 +222,11 @@ function mangle_properties(ast, options) {
         return mangled;
     }
 
-    function addStrings(node, ignore) {
-        var out = {};
-        try {
-            (function walk(node){
-                node.walk(new TreeWalker(function(node){
-                    if (node instanceof AST_Seq) {
-                        walk(node.cdr);
-                        return true;
-                    }
-                    if (node instanceof AST_String) {
-                        add(node.value, ignore);
-                        return true;
-                    }
-                    if (node instanceof AST_Conditional) {
-                        walk(node.consequent);
-                        walk(node.alternative);
-                        return true;
-                    }
-                    throw out;
-                }));
-            })(node);
-        } catch(ex) {
-            if (ex !== out) throw ex;
-        }
-    }
-
     function mangleStrings(node) {
         return node.transform(new TreeTransformer(function(node){
-            if (node instanceof AST_Seq) {
+            if (node instanceof AST_Sequence) {
-                node.cdr = mangleStrings(node.cdr);
+                var last = node.expressions.length - 1;
+                node.expressions[last] = mangleStrings(node.expressions[last]);
             }
             else if (node instanceof AST_String) {
                 node.value = mangle(node.value);
@@ -253,5 +238,4 @@ function mangle_properties(ast, options) {
             return node;
         }));
     }
-
 }

lib/scope.js

@@ -46,8 +46,10 @@
 function SymbolDef(scope, index, orig) {
     this.name = orig.name;
     this.orig = [ orig ];
+    this.eliminated = 0;
     this.scope = scope;
     this.references = [];
+    this.replaced = 0;
     this.global = false;
     this.mangled_name = null;
     this.undeclared = false;
@@ -76,12 +78,10 @@ SymbolDef.prototype = {
         else if (!this.mangled_name && !this.unmangleable(options)) {
             var s = this.scope;
             var sym = this.orig[0];
-            if (!options.screw_ie8 && sym instanceof AST_SymbolLambda)
+            if (options.ie8 && sym instanceof AST_SymbolLambda)
                 s = s.parent_scope;
             var def;
-            if (options.screw_ie8
+            if (def = this.redefined()) {
-                && sym instanceof AST_SymbolCatch
-                && (def = s.parent_scope.find_variable(sym))) {
                 this.mangled_name = def.mangled_name || def.name;
             } else
                 this.mangled_name = s.next_mangled(options, this);
@@ -89,13 +89,16 @@ SymbolDef.prototype = {
                 cache.set(this.name, this.mangled_name);
             }
         }
+    },
+    redefined: function() {
+        return this.defun && this.defun.variables.get(this.name);
     }
 };
 
 AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
     options = defaults(options, {
-        screw_ie8: true,
+        cache: null,
-        cache: null
+        ie8: false,
     });
 
     // pass 1: setup scope chaining and handle definitions
@@ -158,8 +161,7 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
             // later.
             (node.scope = defun.parent_scope).def_function(node);
         }
-        else if (node instanceof AST_SymbolVar
+        else if (node instanceof AST_SymbolVar) {
-            || node instanceof AST_SymbolConst) {
             defun.def_variable(node);
             if (defun !== scope) {
                 node.mark_enclosed(options);
@@ -171,7 +173,7 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
             }
         }
         else if (node instanceof AST_SymbolCatch) {
-            scope.def_variable(node);
+            scope.def_variable(node).defun = defun;
         }
         else if (node instanceof AST_LabelRef) {
             var sym = labels.get(node.name);
@@ -186,16 +188,8 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
     self.walk(tw);
 
     // pass 2: find back references and eval
-    var func = null;
+    self.globals = new Dictionary();
-    var globals = self.globals = new Dictionary();
     var tw = new TreeWalker(function(node, descend){
-        if (node instanceof AST_Lambda) {
-            var prev_func = func;
-            func = node;
-            descend();
-            func = prev_func;
-            return true;
-        }
         if (node instanceof AST_LoopControl && node.label) {
             node.label.thedef.references.push(node);
             return true;
@@ -208,32 +202,42 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
                 }
             }
             var sym = node.scope.find_variable(name);
-            if (node.scope instanceof AST_Lambda && name == "arguments") {
-                node.scope.uses_arguments = true;
-            }
             if (!sym) {
                 sym = self.def_global(node);
+            } else if (sym.scope instanceof AST_Lambda && name == "arguments") {
+                sym.scope.uses_arguments = true;
             }
             node.thedef = sym;
             node.reference(options);
             return true;
         }
+        // ensure mangling works if catch reuses a scope variable
+        var def;
+        if (node instanceof AST_SymbolCatch && (def = node.definition().redefined())) {
+            var s = node.scope;
+            while (s) {
+                push_uniq(s.enclosed, def);
+                if (s === def.scope) break;
+                s = s.parent_scope;
+            }
+        }
     });
     self.walk(tw);
 
     // pass 3: fix up any scoping issue with IE8
-    if (!options.screw_ie8) {
+    if (options.ie8) {
         self.walk(new TreeWalker(function(node, descend) {
             if (node instanceof AST_SymbolCatch) {
                 var name = node.name;
                 var refs = node.thedef.references;
-                var scope = node.thedef.scope.parent_scope;
+                var scope = node.thedef.defun;
                 var def = scope.find_variable(name) || self.globals.get(name) || scope.def_variable(node);
                 refs.forEach(function(ref) {
                     ref.thedef = def;
                     ref.reference(options);
                 });
                 node.thedef = def;
+                node.reference(options);
                 return true;
             }
         }));
@@ -270,7 +274,7 @@ AST_Scope.DEFMETHOD("init_scope_vars", function(parent_scope){
 AST_Lambda.DEFMETHOD("init_scope_vars", function(){
     AST_Scope.prototype.init_scope_vars.apply(this, arguments);
     this.uses_arguments = false;
-    this.def_variable(new AST_SymbolVar({
+    this.def_variable(new AST_SymbolFunarg({
         name: "arguments",
         start: this.start,
         end: this.end
@@ -327,8 +331,8 @@ AST_Scope.DEFMETHOD("next_mangled", function(options){
         if (!is_identifier(m)) continue; // skip over "do"
 
         // https://github.com/mishoo/UglifyJS2/issues/242 -- do not
-        // shadow a name excepted from mangling.
+        // shadow a name reserved from mangling.
-        if (options.except.indexOf(m) >= 0) continue;
+        if (options.reserved.indexOf(m) >= 0) continue;
 
         // we must ensure that the mangled name does not shadow a name
         // from some parent scope that is referenced in this or in
@@ -360,36 +364,18 @@ AST_Function.DEFMETHOD("next_mangled", function(options, def){
 });
 
 AST_Symbol.DEFMETHOD("unmangleable", function(options){
-    return this.definition().unmangleable(options);
+    var def = this.definition();
-});
+    return !def || def.unmangleable(options);
-
-// property accessors are not mangleable
-AST_SymbolAccessor.DEFMETHOD("unmangleable", function(){
-    return true;
 });
 
 // labels are always mangleable
-AST_Label.DEFMETHOD("unmangleable", function(){
+AST_Label.DEFMETHOD("unmangleable", return_false);
-    return false;
-});
 
 AST_Symbol.DEFMETHOD("unreferenced", function(){
     return this.definition().references.length == 0
         && !(this.scope.uses_eval || this.scope.uses_with);
 });
 
-AST_Symbol.DEFMETHOD("undeclared", function(){
-    return this.definition().undeclared;
-});
-
-AST_LabelRef.DEFMETHOD("undeclared", function(){
-    return false;
-});
-
-AST_Label.DEFMETHOD("undeclared", function(){
-    return false;
-});
-
 AST_Symbol.DEFMETHOD("definition", function(){
     return this.thedef;
 });
@@ -399,21 +385,22 @@ AST_Symbol.DEFMETHOD("global", function(){
 });
 
 AST_Toplevel.DEFMETHOD("_default_mangler_options", function(options){
-    return defaults(options, {
+    options = defaults(options, {
-        except      : [],
         eval        : false,
-        sort        : false, // Ignored. Flag retained for backwards compatibility.
+        ie8         : false,
+        keep_fnames : false,
+        reserved    : [],
         toplevel    : false,
-        screw_ie8   : true,
-        keep_fnames : false
     });
+    if (!Array.isArray(options.reserved)) options.reserved = [];
+    return options;
 });
 
 AST_Toplevel.DEFMETHOD("mangle_names", function(options){
     options = this._default_mangler_options(options);
 
     // Never mangle arguments
-    options.except.push('arguments');
+    options.reserved.push('arguments');
 
     // We only need to mangle declaration nodes.  Special logic wired
     // into the code generator will display the mangled name if it's
@@ -424,7 +411,7 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
 
     if (options.cache) {
         this.globals.each(function(symbol){
-            if (options.except.indexOf(symbol.name) < 0) {
+            if (options.reserved.indexOf(symbol.name) < 0) {
                 to_mangle.push(symbol);
             }
         });
@@ -441,7 +428,7 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
         if (node instanceof AST_Scope) {
             var p = tw.parent(), a = [];
             node.variables.each(function(symbol){
-                if (options.except.indexOf(symbol.name) < 0) {
+                if (options.reserved.indexOf(symbol.name) < 0) {
                     a.push(symbol);
                 }
             });
@@ -454,7 +441,7 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
             node.mangled_name = name;
             return true;
         }
-        if (options.screw_ie8 && node instanceof AST_SymbolCatch) {
+        if (!options.ie8 && node instanceof AST_SymbolCatch) {
             to_mangle.push(node.definition());
             return;
         }
@@ -469,105 +456,69 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
 
 AST_Toplevel.DEFMETHOD("compute_char_frequency", function(options){
     options = this._default_mangler_options(options);
-    var tw = new TreeWalker(function(node){
+    try {
-        if (node instanceof AST_Constant)
+        AST_Node.prototype.print = function(stream, force_parens) {
-            base54.consider(node.print_to_string());
+            this._print(stream, force_parens);
-        else if (node instanceof AST_Return)
+            if (this instanceof AST_Symbol && !this.unmangleable(options)) {
-            base54.consider("return");
+                base54.consider(this.name, -1);
-        else if (node instanceof AST_Throw)
+            } else if (options.properties) {
-            base54.consider("throw");
+                if (this instanceof AST_Dot) {
-        else if (node instanceof AST_Continue)
+                    base54.consider(this.property, -1);
-            base54.consider("continue");
+                } else if (this instanceof AST_Sub) {
-        else if (node instanceof AST_Break)
+                    skip_string(this.property);
-            base54.consider("break");
+                }
-        else if (node instanceof AST_Debugger)
+            }
-            base54.consider("debugger");
+        };
-        else if (node instanceof AST_Directive)
+        base54.consider(this.print_to_string(), 1);
-            base54.consider(node.value);
+    } finally {
-        else if (node instanceof AST_While)
+        AST_Node.prototype.print = AST_Node.prototype._print;
-            base54.consider("while");
+    }
-        else if (node instanceof AST_Do)
-            base54.consider("do while");
-        else if (node instanceof AST_If) {
-            base54.consider("if");
-            if (node.alternative) base54.consider("else");
-        }
-        else if (node instanceof AST_Var)
-            base54.consider("var");
-        else if (node instanceof AST_Const)
-            base54.consider("const");
-        else if (node instanceof AST_Lambda)
-            base54.consider("function");
-        else if (node instanceof AST_For)
-            base54.consider("for");
-        else if (node instanceof AST_ForIn)
-            base54.consider("for in");
-        else if (node instanceof AST_Switch)
-            base54.consider("switch");
-        else if (node instanceof AST_Case)
-            base54.consider("case");
-        else if (node instanceof AST_Default)
-            base54.consider("default");
-        else if (node instanceof AST_With)
-            base54.consider("with");
-        else if (node instanceof AST_ObjectSetter)
-            base54.consider("set" + node.key);
-        else if (node instanceof AST_ObjectGetter)
-            base54.consider("get" + node.key);
-        else if (node instanceof AST_ObjectKeyVal)
-            base54.consider(node.key);
-        else if (node instanceof AST_New)
-            base54.consider("new");
-        else if (node instanceof AST_This)
-            base54.consider("this");
-        else if (node instanceof AST_Try)
-            base54.consider("try");
-        else if (node instanceof AST_Catch)
-            base54.consider("catch");
-        else if (node instanceof AST_Finally)
-            base54.consider("finally");
-        else if (node instanceof AST_Symbol && node.unmangleable(options))
-            base54.consider(node.name);
-        else if (node instanceof AST_Unary || node instanceof AST_Binary)
-            base54.consider(node.operator);
-        else if (node instanceof AST_Dot)
-            base54.consider(node.property);
-    });
-    this.walk(tw);
     base54.sort();
+
+    function skip_string(node) {
+        if (node instanceof AST_String) {
+            base54.consider(node.value, -1);
+        } else if (node instanceof AST_Conditional) {
+            skip_string(node.consequent);
+            skip_string(node.alternative);
+        } else if (node instanceof AST_Sequence) {
+            skip_string(node.expressions[node.expressions.length - 1]);
+        }
+    }
 });
 
 var base54 = (function() {
-    var string = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_0123456789";
+    var leading = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_".split("");
+    var digits = "0123456789".split("");
     var chars, frequency;
     function reset() {
         frequency = Object.create(null);
-        chars = string.split("").map(function(ch){ return ch.charCodeAt(0) });
+        leading.forEach(function(ch) {
-        chars.forEach(function(ch){ frequency[ch] = 0 });
+            frequency[ch] = 0;
+        });
+        digits.forEach(function(ch) {
+            frequency[ch] = 0;
+        });
     }
-    base54.consider = function(str){
+    base54.consider = function(str, delta) {
         for (var i = str.length; --i >= 0;) {
-            var code = str.charCodeAt(i);
+            frequency[str[i]] += delta;
-            if (code in frequency) ++frequency[code];
         }
     };
+    function compare(a, b) {
+        return frequency[b] - frequency[a];
+    }
     base54.sort = function() {
-        chars = mergeSort(chars, function(a, b){
+        chars = mergeSort(leading, compare).concat(mergeSort(digits, compare));
-            if (is_digit(a) && !is_digit(b)) return 1;
-            if (is_digit(b) && !is_digit(a)) return -1;
-            return frequency[b] - frequency[a];
-        });
     };
     base54.reset = reset;
     reset();
-    base54.get = function(){ return chars };
-    base54.freq = function(){ return frequency };
     function base54(num) {
         var ret = "", base = 54;
         num++;
         do {
             num--;
-            ret += String.fromCharCode(chars[num % base]);
+            ret += chars[num % base];
             num = Math.floor(num / base);
             base = 64;
         } while (num > 0);
@@ -575,89 +526,3 @@ var base54 = (function() {
     };
     return base54;
 })();
-
-AST_Toplevel.DEFMETHOD("scope_warnings", function(options){
-    options = defaults(options, {
-        undeclared       : false, // this makes a lot of noise
-        unreferenced     : true,
-        assign_to_global : true,
-        func_arguments   : true,
-        nested_defuns    : true,
-        eval             : true
-    });
-    var tw = new TreeWalker(function(node){
-        if (options.undeclared
-            && node instanceof AST_SymbolRef
-            && node.undeclared())
-        {
-            // XXX: this also warns about JS standard names,
-            // i.e. Object, Array, parseInt etc.  Should add a list of
-            // exceptions.
-            AST_Node.warn("Undeclared symbol: {name} [{file}:{line},{col}]", {
-                name: node.name,
-                file: node.start.file,
-                line: node.start.line,
-                col: node.start.col
-            });
-        }
-        if (options.assign_to_global)
-        {
-            var sym = null;
-            if (node instanceof AST_Assign && node.left instanceof AST_SymbolRef)
-                sym = node.left;
-            else if (node instanceof AST_ForIn && node.init instanceof AST_SymbolRef)
-                sym = node.init;
-            if (sym
-                && (sym.undeclared()
-                    || (sym.global() && sym.scope !== sym.definition().scope))) {
-                AST_Node.warn("{msg}: {name} [{file}:{line},{col}]", {
-                    msg: sym.undeclared() ? "Accidental global?" : "Assignment to global",
-                    name: sym.name,
-                    file: sym.start.file,
-                    line: sym.start.line,
-                    col: sym.start.col
-                });
-            }
-        }
-        if (options.eval
-            && node instanceof AST_SymbolRef
-            && node.undeclared()
-            && node.name == "eval") {
-            AST_Node.warn("Eval is used [{file}:{line},{col}]", node.start);
-        }
-        if (options.unreferenced
-            && (node instanceof AST_SymbolDeclaration || node instanceof AST_Label)
-            && !(node instanceof AST_SymbolCatch)
-            && node.unreferenced()) {
-            AST_Node.warn("{type} {name} is declared but not referenced [{file}:{line},{col}]", {
-                type: node instanceof AST_Label ? "Label" : "Symbol",
-                name: node.name,
-                file: node.start.file,
-                line: node.start.line,
-                col: node.start.col
-            });
-        }
-        if (options.func_arguments
-            && node instanceof AST_Lambda
-            && node.uses_arguments) {
-            AST_Node.warn("arguments used in function {name} [{file}:{line},{col}]", {
-                name: node.name ? node.name.name : "anonymous",
-                file: node.start.file,
-                line: node.start.line,
-                col: node.start.col
-            });
-        }
-        if (options.nested_defuns
-            && node instanceof AST_Defun
-            && !(tw.parent() instanceof AST_Scope)) {
-            AST_Node.warn("Function {name} declared in nested statement \"{type}\" [{file}:{line},{col}]", {
-                name: node.name.name,
-                type: tw.parent().TYPE,
-                file: node.start.file,
-                line: node.start.line,
-                col: node.start.col
-            });
-        }
-    });
-    this.walk(tw);
-});

lib/transform.js

@@ -70,7 +70,7 @@ TreeTransformer.prototype = new TreeWalker;
                     if (y !== undefined) x = y;
                 }
             }
-            tw.pop(this);
+            tw.pop();
             return x;
         });
     };
@@ -174,9 +174,8 @@ TreeTransformer.prototype = new TreeWalker;
         self.args = do_list(self.args, tw);
     });
 
-    _(AST_Seq, function(self, tw){
+    _(AST_Sequence, function(self, tw){
-        self.car = self.car.transform(tw);
+        self.expressions = do_list(self.expressions, tw);
-        self.cdr = self.cdr.transform(tw);
     });
 
     _(AST_Dot, function(self, tw){

lib/utils.js

@@ -43,13 +43,6 @@
 
 "use strict";
 
-function array_to_hash(a) {
-    var ret = Object.create(null);
-    for (var i = 0; i < a.length; ++i)
-        ret[a[i]] = true;
-    return ret;
-};
-
 function slice(a, start) {
     return Array.prototype.slice.call(a, start || 0);
 };
@@ -346,7 +339,7 @@ function first_in_statement(stack) {
     for (var i = 0, p; p = stack.parent(i); i++) {
         if (p instanceof AST_Statement && p.body === node)
             return true;
-        if ((p instanceof AST_Seq           && p.car === node        ) ||
+        if ((p instanceof AST_Sequence      && p.expressions[0] === node) ||
             (p instanceof AST_Call          && p.expression === node && !(p instanceof AST_New) ) ||
             (p instanceof AST_Dot           && p.expression === node ) ||
             (p instanceof AST_Sub           && p.expression === node ) ||

package.json

@@ -4,7 +4,7 @@
   "homepage": "http://lisperator.net/uglifyjs",
   "author": "Mihai Bazon <mihai.bazon@gmail.com> (http://lisperator.net/)",
   "license": "BSD-2-Clause",
-  "version": "2.8.17",
+  "version": "3.1.10",
   "engines": {
     "node": ">=0.8.0"
   },
@@ -29,26 +29,16 @@
     "LICENSE"
   ],
   "dependencies": {
-    "source-map": "~0.5.1",
+    "commander": "~2.11.0",
-    "yargs": "~3.10.0"
+    "source-map": "~0.6.1"
   },
   "devDependencies": {
-    "acorn": "~0.6.0",
+    "acorn": "~5.1.1",
-    "escodegen": "~1.3.3",
+    "mocha": "~3.5.1",
-    "esfuzz": "~0.3.1",
+    "semver": "~5.4.1"
-    "estraverse": "~1.5.1",
-    "mocha": "~2.3.4"
-  },
-  "optionalDependencies": {
-    "uglify-to-browserify": "~1.0.0"
-  },
-  "browserify": {
-    "transform": [
-      "uglify-to-browserify"
-    ]
   },
   "scripts": {
     "test": "node test/run-tests.js"
   },
-  "keywords": ["uglify", "uglify-js", "minify", "minifier"]
+  "keywords": ["uglify", "uglify-js", "minify", "minifier", "es5"]
 }

test/benchmark.js

@@ -4,15 +4,17 @@
 "use strict";
 
 var createHash = require("crypto").createHash;
+var fetch = require("./fetch");
 var fork = require("child_process").fork;
+var zlib = require("zlib");
 var args = process.argv.slice(2);
 if (!args.length) {
-    args.push("-mc", "warnings=false");
+    args.push("-mc");
 }
-args.push("--stats");
+args.push("--timings");
 var urls = [
-    "https://code.jquery.com/jquery-3.1.1.js",
+    "https://code.jquery.com/jquery-3.2.1.js",
-    "https://code.angularjs.org/1.6.1/angular.js",
+    "https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.6.4/angular.js",
     "https://cdnjs.cloudflare.com/ajax/libs/mathjs/3.9.0/math.js",
     "https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.js",
     "https://unpkg.com/react@15.3.2/dist/react.js",
@@ -30,13 +32,9 @@ function done() {
             console.log();
             console.log(url);
             console.log(info.log);
-            var elapsed = 0;
-            info.log.replace(/: ([0-9]+\.[0-9]{3})s/g, function(match, time) {
-                elapsed += parseFloat(time);
-            });
-            console.log("Run-time:", elapsed.toFixed(3), "s");
             console.log("Original:", info.input, "bytes");
             console.log("Uglified:", info.output, "bytes");
+            console.log("GZipped: ", info.gzip, "bytes");
             console.log("SHA1 sum:", info.sha1);
             if (info.code) {
                 failures.push(url);
@@ -55,15 +53,21 @@ urls.forEach(function(url) {
     results[url] = {
         input: 0,
         output: 0,
+        gzip: 0,
         log: ""
     };
-    require(url.slice(0, url.indexOf(":"))).get(url, function(res) {
+    fetch(url, function(err, res) {
+        if (err) throw err;
         var uglifyjs = fork("bin/uglifyjs", args, { silent: true });
         res.on("data", function(data) {
             results[url].input += data.length;
         }).pipe(uglifyjs.stdin);
         uglifyjs.stdout.on("data", function(data) {
             results[url].output += data.length;
+        }).pipe(zlib.createGzip({
+            level: zlib.Z_BEST_COMPRESSION
+        })).on("data", function(data) {
+            results[url].gzip += data.length;
         }).pipe(createHash("sha1")).on("data", function(data) {
             results[url].sha1 = data.toString("hex");
             done();

test/compress/angular-inject.js

@@ -1,67 +0,0 @@
-ng_inject_defun: {
-    options = {
-        angular: true
-    };
-    input: {
-        /*@ngInject*/
-        function Controller(dependency) {
-            return dependency;
-        }
-    }
-    expect: {
-        function Controller(dependency) {
-            return dependency;
-        }
-        Controller.$inject=['dependency']
-    }
-}
-
-ng_inject_assignment: {
-    options = {
-        angular: true
-    };
-    input: {
-        /*@ngInject*/
-        var Controller = function(dependency) {
-            return dependency;
-        }
-    }
-    expect: {
-        var Controller = function(dependency) {
-            return dependency;
-        }
-        Controller.$inject=['dependency']
-    }
-}
-
-ng_inject_inline: {
-    options = {
-        angular: true
-    };
-    input: {
-        angular.module('a').
-            factory('b',
-                /*@ngInject*/
-                function(dependency) {
-                    return dependency;
-                }).
-            directive('c',
-                /*@ngInject*/
-                function(anotherDependency) {
-                    return anotherDependency;
-                })
-    }
-    expect: {
-        angular.module('a').
-            factory('b',[
-                'dependency',
-                function(dependency) {
-                    return dependency;
-                }]).
-            directive('c',[
-                'anotherDependency',
-                function(anotherDependency) {
-                    return anotherDependency;
-                }])
-    }
-}

test/compress/arrays.js

@@ -128,50 +128,114 @@ constant_join_3: {
 
 for_loop: {
     options = {
-        unsafe      : true,
+        evaluate: true,
-        unused      : true,
+        reduce_funcs: true,
-        evaluate    : true,
+        reduce_vars: true,
-        reduce_vars : true
+        unsafe: true,
+        unused: true,
     };
     input: {
         function f0() {
             var a = [1, 2, 3];
-            for (var i = 0; i < a.length; i++) {
+            var b = 0;
-                console.log(a[i]);
+            for (var i = 0; i < a.length; i++)
-            }
+                b += a[i];
+            return b;
         }
-
         function f1() {
             var a = [1, 2, 3];
-            for (var i = 0, len = a.length; i < len; i++) {
+            var b = 0;
-                console.log(a[i]);
+            for (var i = 0, len = a.length; i < len; i++)
-            }
+                b += a[i];
+            return b;
         }
-
-        function f2() {
-            var a = [1, 2, 3];
-            for (var i = 0; i < a.length; i++) {
-                a[i]++;
-            }
-        }
-    }
-    expect: {
-        function f0() {
-            var a = [1, 2, 3];
-            for (var i = 0; i < 3; i++)
-                console.log(a[i]);
-        }
-
-        function f1() {
-            var a = [1, 2, 3];
-            for (var i = 0; i < 3; i++)
-                console.log(a[i]);
-        }
-
         function f2() {
             var a = [1, 2, 3];
             for (var i = 0; i < a.length; i++)
                 a[i]++;
+            return a[2];
         }
+        console.log(f0(), f1(), f2());
     }
+    expect: {
+        function f0() {
+            var a = [1, 2, 3];
+            var b = 0;
+            for (var i = 0; i < 3; i++)
+                b += a[i];
+            return b;
+        }
+        function f1() {
+            var a = [1, 2, 3];
+            var b = 0;
+            for (var i = 0; i < 3; i++)
+                b += a[i];
+            return b;
+        }
+        function f2() {
+            var a = [1, 2, 3];
+            for (var i = 0; i < a.length; i++)
+                a[i]++;
+            return a[2];
+        }
+        console.log(f0(), f1(), f2());
+    }
+    expect_stdout: "6 6 4"
+}
+
+index: {
+    options = {
+        evaluate: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        var a = [ 1, 2 ];
+        console.log(a[0], a[1]);
+    }
+    expect: {
+        console.log(1, 2);
+    }
+    expect_stdout: "1 2"
+}
+
+length: {
+    options = {
+        evaluate: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        var a = [ 1, 2 ];
+        console.log(a.length);
+    }
+    expect: {
+        console.log(2);
+    }
+    expect_stdout: "2"
+}
+
+index_length: {
+    options = {
+        evaluate: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        var a = [ 1, 2 ];
+        console.log(a[0], a.length);
+    }
+    expect: {
+        console.log(1, 2);
+    }
+    expect_stdout: "1 2"
 }

test/compress/ascii.js

@@ -2,7 +2,7 @@ ascii_only_true: {
     options = {}
     beautify = {
         ascii_only : true,
-        screw_ie8  : true,
+        ie8        : false,
         beautify   : false,
     }
     input: {
@@ -13,14 +13,14 @@ ascii_only_true: {
                    "\x20\x21\x22\x23 ... \x7d\x7e\x7f\x80\x81 ... \xfe\xff\u0fff\uffff";
         }
     }
-    expect_exact: 'function f(){return"\\x000\\x001\\x007\\08\\0"+"\\0\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\b\\t\\n\\v\\f\\r\\x0e\\x0f"+"\\x10\\x11\\x12\\x13\\x14\\x15\\x16\\x17\\x18\\x19\\x1a\\x1b\\x1c\\x1d\\x1e\\x1f"+\' !"# ... }~\\x7f\\x80\\x81 ... \\xfe\\xff\\u0fff\\uffff\'}'
+    expect_exact: 'function f(){return"\\x000\\x001\\x007\\x008\\0"+"\\0\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\b\\t\\n\\v\\f\\r\\x0e\\x0f"+"\\x10\\x11\\x12\\x13\\x14\\x15\\x16\\x17\\x18\\x19\\x1a\\x1b\\x1c\\x1d\\x1e\\x1f"+\' !"# ... }~\\x7f\\x80\\x81 ... \\xfe\\xff\\u0fff\\uffff\'}'
 }
 
 ascii_only_false: {
     options = {}
     beautify = {
         ascii_only : false,
-        screw_ie8  : true,
+        ie8        : false,
         beautify   : false,
     }
     input: {
@@ -31,6 +31,5 @@ ascii_only_false: {
                    "\x20\x21\x22\x23 ... \x7d\x7e\x7f\x80\x81 ... \xfe\xff\u0fff\uffff";
         }
     }
-    expect_exact: 'function f(){return"\\x000\\x001\\x007\\08\\0"+"\\0\x01\x02\x03\x04\x05\x06\x07\\b\\t\\n\\v\\f\\r\x0e\x0f"+"\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f"+\' !"# ... }~\x7f\x80\x81 ... \xfe\xff\u0fff\uffff\'}'
+    expect_exact: 'function f(){return"\\x000\\x001\\x007\\x008\\0"+"\\0\x01\x02\x03\x04\x05\x06\x07\\b\\t\\n\\v\\f\\r\x0e\x0f"+"\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f"+\' !"# ... }~\x7f\x80\x81 ... \xfe\xff\u0fff\uffff\'}'
 }
-

test/compress/asm.js

@@ -104,3 +104,65 @@ asm_mixed: {
     }
 }
 
+asm_toplevel: {
+    options = {}
+    input: {
+        "use asm";
+        0.0;
+        function f() {
+            0.0;
+            (function(){
+                0.0;
+            });
+        }
+        0.0;
+    }
+    expect_exact: '"use asm";0.0;function f(){0.0;(function(){0.0})}0.0;'
+}
+
+asm_function_expression: {
+    options = {}
+    input: {
+        0.0;
+        var a = function() {
+            "use asm";
+            0.0;
+        }
+        function f() {
+            0.0;
+            return function(){
+                "use asm";
+                0.0;
+            }
+            0.0;
+        }
+        0.0;
+    }
+    expect_exact: '0;var a=function(){"use asm";0.0};function f(){0;return function(){"use asm";0.0};0}0;'
+}
+
+asm_nested_functions: {
+    options = {}
+    input: {
+        0.0;
+        function a() {
+            "use asm";
+            0.0;
+        }
+        0.0;
+        function b() {
+            0.0;
+            function c(){
+                "use asm";
+                0.0;
+            }
+            0.0;
+            function d(){
+                0.0;
+            }
+            0.0;
+        }
+        0.0;
+    }
+    expect_exact: '0;function a(){"use asm";0.0}0;function b(){0;function c(){"use asm";0.0}0;function d(){0}0}0;'
+}

test/compress/comparing.js

@@ -73,4 +73,42 @@ dont_change_in_or_instanceof_expressions: {
         1 instanceof 1;
         null instanceof null;
     }
-}
+}
+
+self_comparison_1: {
+    options = {
+        comparisons: true,
+    }
+    input: {
+        a === a;
+        a !== b;
+        b.c === a.c;
+        b.c !== b.c;
+    }
+    expect: {
+        a == a;
+        a !== b;
+        b.c === a.c;
+        b.c != b.c;
+    }
+}
+
+self_comparison_2: {
+    options = {
+        comparisons: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        function f() {}
+        var o = {};
+        console.log(f != f, o === o);
+    }
+    expect: {
+        function f() {}
+        var o = {};
+        console.log(false, true);
+    }
+    expect_stdout: "false true"
+}

test/compress/concat-strings.js

@@ -21,7 +21,7 @@ concat_1: {
         var c = 1 + x() + 2 + "boo";
         var d = 1 + x() + 2 + 3 + "boo";
         var e = 1 + x() + 2 + "X3boo";
-        var f = "\x00360\08\0";
+        var f = "\x00360\x008\0";
     }
 }
 

test/compress/conditionals.js

@@ -962,3 +962,56 @@ condition_symbol_matches_consequent: {
     }
     expect_stdout: "3 7 true 4"
 }
+
+delete_conditional_1: {
+    options = {
+        booleans: true,
+        conditionals: true,
+        evaluate: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(delete (1 ? undefined : x));
+        console.log(delete (1 ? void 0 : x));
+        console.log(delete (1 ? Infinity : x));
+        console.log(delete (1 ? 1 / 0 : x));
+        console.log(delete (1 ? NaN : x));
+        console.log(delete (1 ? 0 / 0 : x));
+    }
+    expect: {
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+    }
+    expect_stdout: true
+}
+
+delete_conditional_2: {
+    options = {
+        booleans: true,
+        conditionals: true,
+        evaluate: true,
+        keep_infinity: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(delete (0 ? x : undefined));
+        console.log(delete (0 ? x : void 0));
+        console.log(delete (0 ? x : Infinity));
+        console.log(delete (0 ? x : 1 / 0));
+        console.log(delete (0 ? x : NaN));
+        console.log(delete (0 ? x : 0 / 0));
+    }
+    expect: {
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+    }
+    expect_stdout: true
+}

test/compress/const.js

@@ -1,166 +0,0 @@
-issue_1191: {
-    options = {
-        evaluate      : true,
-        booleans      : true,
-        comparisons   : true,
-        dead_code     : true,
-        conditionals  : true,
-        side_effects  : true,
-        unused        : true,
-        hoist_funs    : true,
-        if_return     : true,
-        join_vars     : true,
-        sequences     : false,
-        collapse_vars : false,
-        reduce_vars   : true,
-    }
-    input: {
-        function foo(rot) {
-            const rotTol = 5;
-            if (rot < -rotTol || rot > rotTol)
-                bar();
-            baz();
-        }
-    }
-    expect: {
-        function foo(rot) {
-            (rot < -5 || rot > 5) && bar();
-            baz();
-        }
-    }
-}
-
-issue_1194: {
-    options = {
-        evaluate      : true,
-        booleans      : true,
-        comparisons   : true,
-        dead_code     : true,
-        conditionals  : true,
-        side_effects  : true,
-        unused        : true,
-        hoist_funs    : true,
-        if_return     : true,
-        join_vars     : true,
-        sequences     : false,
-        collapse_vars : false,
-        reduce_vars   : true,
-    }
-    input: {
-        function f1() {const a = "X"; return a + a;}
-        function f2() {const aa = "X"; return aa + aa;}
-        function f3() {const aaa = "X"; return aaa + aaa;}
-    }
-    expect: {
-        function f1(){return"XX"}
-        function f2(){return"XX"}
-        function f3(){return"XX"}
-    }
-}
-
-issue_1396: {
-    options = {
-        evaluate      : true,
-        booleans      : true,
-        comparisons   : true,
-        dead_code     : true,
-        conditionals  : true,
-        side_effects  : true,
-        unused        : true,
-        hoist_funs    : true,
-        if_return     : true,
-        join_vars     : true,
-        sequences     : false,
-        collapse_vars : false,
-        reduce_vars   : true,
-    }
-    input: {
-        function foo(a) {
-            const VALUE = 1;
-            console.log(2 | VALUE);
-            console.log(VALUE + 1);
-            console.log(VALUE);
-            console.log(a & VALUE);
-        }
-        function bar() {
-            const s = "01234567890123456789";
-            console.log(s + s + s + s + s);
-
-            const CONSTANT = "abc";
-            console.log(CONSTANT + CONSTANT + CONSTANT + CONSTANT + CONSTANT);
-        }
-    }
-    expect: {
-        function foo(a) {
-            console.log(3);
-            console.log(2);
-            console.log(1);
-            console.log(1 & a);
-        }
-        function bar() {
-            const s = "01234567890123456789";
-            console.log(s + s + s + s + s);
-
-            console.log("abcabcabcabcabc");
-        }
-    }
-}
-
-unused_regexp_literal: {
-    options = {
-        evaluate      : true,
-        booleans      : true,
-        comparisons   : true,
-        dead_code     : true,
-        conditionals  : true,
-        side_effects  : true,
-        unused        : true,
-        hoist_funs    : true,
-        if_return     : true,
-        join_vars     : true,
-        sequences     : false,
-        collapse_vars : false,
-    }
-    input: {
-        function f(){ var a = /b/; }
-    }
-    expect: {
-        function f(){}
-    }
-}
-
-regexp_literal_not_const: {
-    options = {
-        evaluate      : true,
-        booleans      : true,
-        comparisons   : true,
-        dead_code     : true,
-        conditionals  : true,
-        side_effects  : true,
-        unused        : true,
-        hoist_funs    : true,
-        if_return     : true,
-        join_vars     : true,
-        sequences     : false,
-        collapse_vars : false,
-        reduce_vars   : true,
-    }
-    input: {
-        (function(){
-            var result;
-            const s = 'acdabcdeabbb';
-            const REGEXP_LITERAL = /ab*/g;
-            while (result = REGEXP_LITERAL.exec(s)) {
-                console.log(result[0]);
-            }
-        })();
-    }
-    expect: {
-        (function() {
-            var result;
-            const REGEXP_LITERAL = /ab*/g;
-            while (result = REGEXP_LITERAL.exec("acdabcdeabbb")) console.log(result[0]);
-        })();
-    }
-    expect_stdout: true
-}

test/compress/dead-code.js

@@ -31,7 +31,7 @@ dead_code_2_should_warn: {
         function f() {
             g();
             x = 10;
-            throw "foo";
+            throw new Error("foo");
             // completely discarding the `if` would introduce some
             // bugs.  UglifyJS v1 doesn't deal with this issue; in v2
             // we copy any declarations to the upper scope.
@@ -46,16 +46,60 @@ dead_code_2_should_warn: {
                 })();
             }
         }
+        f();
     }
     expect: {
         function f() {
             g();
             x = 10;
-            throw "foo";
+            throw new Error("foo");
             var x;
             function g(){};
         }
+        f();
     }
+    expect_stdout: true
+    node_version: "<=4"
+}
+
+dead_code_2_should_warn_strict: {
+    options = {
+        dead_code: true
+    };
+    input: {
+        "use strict";
+        function f() {
+            g();
+            x = 10;
+            throw new Error("foo");
+            // completely discarding the `if` would introduce some
+            // bugs.  UglifyJS v1 doesn't deal with this issue; in v2
+            // we copy any declarations to the upper scope.
+            if (x) {
+                y();
+                var x;
+                function g(){};
+                // but nested declarations should not be kept.
+                (function(){
+                    var q;
+                    function y(){};
+                })();
+            }
+        }
+        f();
+    }
+    expect: {
+        "use strict";
+        function f() {
+            g();
+            x = 10;
+            throw new Error("foo");
+            var x;
+        }
+        f();
+    }
+    expect_stdout: true
+    node_version: ">=4"
 }
 
 dead_code_constant_boolean_should_warn_more: {
@@ -78,6 +122,7 @@ dead_code_constant_boolean_should_warn_more: {
             foo();
             var moo;
         }
+        bar();
     }
     expect: {
         var foo;
@@ -86,131 +131,287 @@ dead_code_constant_boolean_should_warn_more: {
         // as for the for, it should keep:
         var x = 10, y;
         var moo;
+        bar();
     }
     expect_stdout: true
+    node_version: "<=4"
 }
 
-dead_code_const_declaration: {
+dead_code_constant_boolean_should_warn_more_strict: {
     options = {
         dead_code    : true,
         loops        : true,
         booleans     : true,
         conditionals : true,
         evaluate     : true,
-        reduce_vars  : true,
+        side_effects : true,
     };
     input: {
-        var unused;
+        "use strict";
-        const CONST_FOO = false;
+        while (!((foo && bar) || (x + "0"))) {
-        if (CONST_FOO) {
             console.log("unreachable");
-            var moo;
+            var foo;
             function bar() {}
         }
+        for (var x = 10, y; x && (y || x) && (!typeof x); ++x) {
+            asdf();
+            foo();
+            var moo;
+        }
+        bar();
     }
     expect: {
-        var unused;
+        "use strict";
-        const CONST_FOO = !1;
+        var foo;
+        // nothing for the while
+        // as for the for, it should keep:
+        var x = 10, y;
         var moo;
-        function bar() {}
+        bar();
     }
     expect_stdout: true
+    node_version: ">=4"
 }
 
-dead_code_const_annotation: {
+try_catch_finally: {
     options = {
-        dead_code    : true,
+        conditionals: true,
-        loops        : true,
+        dead_code: true,
-        booleans     : true,
+        evaluate: true,
-        conditionals : true,
+    }
-        evaluate     : true,
-        reduce_vars  : true,
-        toplevel     : true,
-    };
     input: {
-        var unused;
+        var a = 1;
-        /** @const */ var CONST_FOO_ANN = false;
+        !function() {
-        if (CONST_FOO_ANN) {
+            try {
-            console.log("unreachable");
+                if (false) throw x;
-            var moo;
+            } catch (a) {
-            function bar() {}
+                var a = 2;
-        }
+                console.log("FAIL");
-    }
+            } finally {
-    expect: {
+                a = 3;
-        var unused;
+                console.log("PASS");
-        var CONST_FOO_ANN = !1;
-        var moo;
-        function bar() {}
-    }
-    expect_stdout: true
-}
-
-dead_code_const_annotation_regex: {
-    options = {
-        dead_code    : true,
-        loops        : true,
-        booleans     : true,
-        conditionals : true,
-        evaluate     : true
-    };
-    input: {
-        var unused;
-        // @constraint this shouldn't be a constant
-        var CONST_FOO_ANN = false;
-        if (CONST_FOO_ANN) {
-            console.log("reachable");
-        }
-    }
-    expect: {
-        var unused;
-        var CONST_FOO_ANN = !1;
-        CONST_FOO_ANN && console.log('reachable');
-    }
-    expect_stdout: true
-}
-
-dead_code_const_annotation_complex_scope: {
-    options = {
-        dead_code    : true,
-        loops        : true,
-        booleans     : true,
-        conditionals : true,
-        evaluate     : true,
-        reduce_vars  : true,
-        toplevel     : true,
-    };
-    input: {
-        var unused_var;
-        /** @const */ var test = 'test';
-        // @const
-        var CONST_FOO_ANN = false;
-        var unused_var_2;
-        if (CONST_FOO_ANN) {
-            console.log("unreachable");
-            var moo;
-            function bar() {}
-        }
-        if (test === 'test') {
-            var beef = 'good';
-            /** @const */ var meat = 'beef';
-            var pork = 'bad';
-            if (meat === 'pork') {
-                console.log('also unreachable');
-            } else if (pork === 'good') {
-                console.log('reached, not const');
             }
+        }();
+        try {
+            console.log(a);
+        } finally {
         }
     }
     expect: {
-        var unused_var;
+        var a = 1;
-        var test = 'test';
+        !function() {
-        var CONST_FOO_ANN = !1;
+            var a;
-        var unused_var_2;
+            a = 3;
-        var moo;
+            console.log("PASS");
-        function bar() {}
+        }();
-        var beef = 'good';
+        try {
-        var meat = 'beef';
+            console.log(a);
-        var pork = 'bad';
+        } finally {
+        }
     }
+    expect_stdout: [
+        "PASS",
+        "1",
+    ]
+}
+
+accessor: {
+    options = {
+        side_effects: true,
+    }
+    input: {
+        ({
+            get a() {},
+            set a(v){
+                this.b = 2;
+            },
+            b: 1
+        });
+    }
+    expect: {}
+}
+
+issue_2233_1: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+        unsafe: true,
+    }
+    input: {
+        Array.isArray;
+        Boolean;
+        console.log;
+        Date;
+        decodeURI;
+        decodeURIComponent;
+        encodeURI;
+        encodeURIComponent;
+        Error.name;
+        escape;
+        eval;
+        EvalError;
+        Function.length;
+        isFinite;
+        isNaN;
+        JSON;
+        Math.random;
+        Number.isNaN;
+        parseFloat;
+        parseInt;
+        RegExp;
+        Object.defineProperty;
+        String.fromCharCode;
+        RangeError;
+        ReferenceError;
+        SyntaxError;
+        TypeError;
+        unescape;
+        URIError;
+    }
+    expect: {}
     expect_stdout: true
 }
+
+global_timeout_and_interval_symbols: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+        unsafe: true,
+    }
+    input: {
+        // These global symbols do not exist in the test sandbox
+        // and must be tested separately.
+        clearInterval;
+        clearTimeout;
+        setInterval;
+        setTimeout;
+    }
+    expect: {}
+}
+
+issue_2233_2: {
+    options = {
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        var RegExp;
+        Array.isArray;
+        RegExp;
+        UndeclaredGlobal;
+        function foo() {
+            var Number;
+            AnotherUndeclaredGlobal;
+            Math.sin;
+            Number.isNaN;
+        }
+    }
+    expect: {
+        var RegExp;
+        UndeclaredGlobal;
+        function foo() {
+            var Number;
+            AnotherUndeclaredGlobal;
+            Number.isNaN;
+        }
+    }
+}
+
+issue_2233_3: {
+    options = {
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        var RegExp;
+        Array.isArray;
+        RegExp;
+        UndeclaredGlobal;
+        function foo() {
+            var Number;
+            AnotherUndeclaredGlobal;
+            Math.sin;
+            Number.isNaN;
+        }
+    }
+    expect: {
+        UndeclaredGlobal;
+    }
+}
+
+global_fns: {
+    options = {
+        side_effects: true,
+        unsafe: true,
+    }
+    input: {
+        Boolean(1, 2);
+        decodeURI(1, 2);
+        decodeURIComponent(1, 2);
+        Date(1, 2);
+        encodeURI(1, 2);
+        encodeURIComponent(1, 2);
+        Error(1, 2);
+        escape(1, 2);
+        EvalError(1, 2);
+        isFinite(1, 2);
+        isNaN(1, 2);
+        Number(1, 2);
+        Object(1, 2);
+        parseFloat(1, 2);
+        parseInt(1, 2);
+        RangeError(1, 2);
+        ReferenceError(1, 2);
+        String(1, 2);
+        SyntaxError(1, 2);
+        TypeError(1, 2);
+        unescape(1, 2);
+        URIError(1, 2);
+        try {
+            Function(1, 2);
+        } catch (e) {
+            console.log(e.name);
+        }
+        try {
+            RegExp(1, 2);
+        } catch (e) {
+            console.log(e.name);
+        }
+        try {
+            Array(NaN);
+        } catch (e) {
+            console.log(e.name);
+        }
+    }
+    expect: {
+        try {
+            Function(1, 2);
+        } catch (e) {
+            console.log(e.name);
+        }
+        try {
+            RegExp(1, 2);
+        } catch (e) {
+            console.log(e.name);
+        }
+        try {
+            Array(NaN);
+        } catch (e) {
+            console.log(e.name);
+        }
+    }
+    expect_stdout: [
+        "SyntaxError",
+        "SyntaxError",
+        "RangeError",
+    ]
+}

test/compress/drop-unused.js

@@ -649,37 +649,6 @@ drop_value: {
     }
 }
 
-const_assign: {
-    options = {
-        evaluate: true,
-        reduce_vars: true,
-        unused: true,
-    }
-    input: {
-        function f() {
-            const b = 2;
-            return 1 + b;
-        }
-
-        function g() {
-            const b = 2;
-            b = 3;
-            return 1 + b;
-        }
-    }
-    expect: {
-        function f() {
-            return 3;
-        }
-
-        function g() {
-            const b = 2;
-            b = 3;
-            return 1 + b;
-        }
-    }
-}
-
 issue_1539: {
     options = {
         cascade: true,
@@ -704,6 +673,7 @@ issue_1539: {
 vardef_value: {
     options = {
         keep_fnames: false,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -765,6 +735,7 @@ assign_chain: {
 issue_1583: {
     options = {
         keep_fargs: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -782,11 +753,11 @@ issue_1583: {
     expect: {
         function m(t) {
             (function(e) {
-                t = (function() {
+                t = function() {
                     return (function(a) {
-                        return a;
+                        return function(a) {};
-                    })(function(a) {});
+                    })();
-                })();
+                }();
             })();
         }
     }
@@ -816,10 +787,6 @@ issue_1709: {
                 var x = 1;
                 return x;
             }(),
-            function y() {
-                const y = 2;
-                return y;
-            }(),
             function z() {
                 function z() {}
                 return z;
@@ -832,10 +799,6 @@ issue_1709: {
                 var x = 1;
                 return x;
             }(),
-            function() {
-                const y = 2;
-                return y;
-            }(),
             function() {
                 function z() {}
                 return z;
@@ -853,7 +816,9 @@ issue_1715_1: {
         var a = 1;
         function f() {
             a++;
-            try {} catch (a) {
+            try {
+                x();
+            } catch (a) {
                 var a;
             }
         }
@@ -864,7 +829,9 @@ issue_1715_1: {
         var a = 1;
         function f() {
             a++;
-            try {} catch (a) {
+            try {
+                x();
+            } catch (a) {
                 var a;
             }
         }
@@ -882,7 +849,9 @@ issue_1715_2: {
         var a = 1;
         function f() {
             a++;
-            try {} catch (a) {
+            try {
+                x();
+            } catch (a) {
                 var a = 2;
             }
         }
@@ -893,7 +862,9 @@ issue_1715_2: {
         var a = 1;
         function f() {
             a++;
-            try {} catch (a) {
+            try {
+                x();
+            } catch (a) {
                 var a;
             }
         }
@@ -911,7 +882,9 @@ issue_1715_3: {
         var a = 1;
         function f() {
             a++;
-            try {} catch (a) {
+            try {
+                console;
+            } catch (a) {
                 var a = 2 + x();
             }
         }
@@ -922,8 +895,11 @@ issue_1715_3: {
         var a = 1;
         function f() {
             a++;
-            try {} catch (a) {
+            try {
-                var a = x();
+                console;
+            } catch (a) {
+                var a;
+                x();
             }
         }
         f();
@@ -931,3 +907,395 @@ issue_1715_3: {
     }
     expect_stdout: "1"
 }
+
+issue_1715_4: {
+    options = {
+        unused: true,
+    }
+    input: {
+        var a = 1;
+        !function a() {
+            a++;
+            try {
+                x();
+            } catch (a) {
+                var a;
+            }
+        }();
+        console.log(a);
+    }
+    expect: {
+        var a = 1;
+        !function() {
+            a++;
+            try {
+                x();
+            } catch (a) {
+                var a;
+            }
+        }();
+        console.log(a);
+    }
+    expect_stdout: "1"
+}
+
+delete_assign_1: {
+    options = {
+        booleans: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a;
+        console.log(delete (a = undefined));
+        console.log(delete (a = void 0));
+        console.log(delete (a = Infinity));
+        console.log(delete (a = 1 / 0));
+        console.log(delete (a = NaN));
+        console.log(delete (a = 0 / 0));
+    }
+    expect: {
+        console.log((void 0, !0));
+        console.log((void 0, !0));
+        console.log((1 / 0, !0));
+        console.log((1 / 0, !0));
+        console.log((NaN, !0));
+        console.log((0 / 0, !0));
+    }
+    expect_stdout: true
+}
+
+delete_assign_2: {
+    options = {
+        booleans: true,
+        keep_infinity: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a;
+        console.log(delete (a = undefined));
+        console.log(delete (a = void 0));
+        console.log(delete (a = Infinity));
+        console.log(delete (a = 1 / 0));
+        console.log(delete (a = NaN));
+        console.log(delete (a = 0 / 0));
+    }
+    expect: {
+        console.log((void 0, !0));
+        console.log((void 0, !0));
+        console.log((Infinity, !0));
+        console.log((1 / 0, !0));
+        console.log((NaN, !0));
+        console.log((0 / 0, !0));
+    }
+    expect_stdout: true
+}
+
+drop_var: {
+    options = {
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a;
+        console.log(a, b);
+        var a = 1, b = 2;
+        console.log(a, b);
+        var a = 3;
+        console.log(a, b);
+    }
+    expect: {
+        console.log(a, b);
+        var a = 1, b = 2;
+        console.log(a, b);
+        a = 3;
+        console.log(a, b);
+    }
+    expect_stdout: [
+        "undefined undefined",
+        "1 2",
+        "3 2",
+    ]
+}
+
+issue_1830_1: {
+    options = {
+        unused: true,
+    }
+    input: {
+        !function() {
+            L: for (var b = console.log(1); !1;) continue L;
+        }();
+    }
+    expect: {
+        !function() {
+            L: for (console.log(1); !1;) continue L;
+        }();
+    }
+    expect_stdout: "1"
+}
+
+issue_1830_2: {
+    options = {
+        unused: true,
+    }
+    input: {
+        !function() {
+            L: for (var a = 1, b = console.log(a); --a;) continue L;
+        }();
+    }
+    expect: {
+        !function() {
+            var a = 1;
+            L: for (console.log(a); --a;) continue L;
+        }();
+    }
+    expect_stdout: "1"
+}
+
+issue_1838: {
+    options = {
+        join_vars: true,
+        loops: true,
+        unused: true,
+    }
+    beautify = {
+        beautify: true,
+    }
+    input: {
+        function f() {
+            var b = a;
+            while (c);
+        }
+    }
+    expect_exact: [
+        "function f() {",
+        "    for (a; c; ) ;",
+        "}",
+    ]
+}
+
+var_catch_toplevel: {
+    options = {
+        conditionals: true,
+        negate_iife: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function f() {
+            a--;
+            try {
+                a++;
+                x();
+            } catch(a) {
+                if (a) var a;
+                var a = 10;
+            }
+        }
+        f();
+    }
+    expect: {
+        !function() {
+            try {
+                x();
+            } catch(a) {
+                var a;
+            }
+        }();
+    }
+}
+
+issue_2105_1: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        passes: 3,
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        !function(factory) {
+            factory();
+        }( function() {
+            return function(fn) {
+                fn()().prop();
+            }( function() {
+                function bar() {
+                    var quux = function() {
+                        console.log("PASS");
+                    }, foo = function() {
+                        console.log;
+                        quux();
+                    };
+                    return { prop: foo };
+                }
+                return bar;
+            } );
+        });
+    }
+    expect: {
+        ({
+            prop: function() {
+                console.log;
+                console.log("PASS");
+            }
+        }).prop();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_2105_2: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        passes: 3,
+        properties: true,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        !function(factory) {
+            factory();
+        }( function() {
+            return function(fn) {
+                fn()().prop();
+            }( function() {
+                function bar() {
+                    var quux = function() {
+                        console.log("PASS");
+                    }, foo = function() {
+                        console.log;
+                        quux();
+                    };
+                    return { prop: foo };
+                }
+                return bar;
+            } );
+        });
+    }
+    expect: {
+        console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}
+
+issue_2226_1: {
+    options = {
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        function f1() {
+            var a = b;
+            a += c;
+        }
+        function f2(a) {
+            a <<= b;
+        }
+        function f3(a) {
+            --a;
+        }
+        function f4() {
+            var a = b;
+            return a *= c;
+        }
+        function f5(a) {
+            x(a /= b);
+        }
+    }
+    expect: {
+        function f1() {
+            b;
+            c;
+        }
+        function f2(a) {
+            b;
+        }
+        function f3(a) {
+            0;
+        }
+        function f4() {
+            var a = b;
+            return a *= c;
+        }
+        function f5(a) {
+            x(a /= b);
+        }
+    }
+}
+
+issue_2226_2: {
+    options = {
+        cascade: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(a, b) {
+            a += b;
+            return a;
+        }(1, 2));
+    }
+    expect: {
+        console.log(function(a, b) {
+            return a += b;
+        }(1, 2));
+    }
+    expect_stdout: "3"
+}
+
+issue_2226_3: {
+    options = {
+        collapse_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(a, b) {
+            a += b;
+            return a;
+        }(1, 2));
+    }
+    expect: {
+        console.log(function(a, b) {
+            return a += 2;
+        }(1));
+    }
+    expect_stdout: "3"
+}
+
+issue_2288: {
+    options = {
+        unused: true,
+    }
+    beautify = {
+        beautify: true,
+    }
+    input: {
+        function foo(o) {
+            for (var j = o.a, i = 0; i < 0; i++);
+            for (var i = 0; i < 0; i++);
+        }
+    }
+    expect: {
+        function foo(o) {
+            o.a;
+            for (i = 0; i < 0; i++);
+            for (var i = 0; i < 0; i++);
+        }
+    }
+}

test/compress/evaluate.js

@@ -196,8 +196,8 @@ negative_zero: {
         console.log(
             -0,
             0,
-            1 / (-0),
+            -1/0,
-            1 / (-0)
+            -1/0
         );
     }
     expect_stdout: true
@@ -217,8 +217,8 @@ positive_zero: {
         console.log(
             0,
             -0,
-            1 / (0),
+            1/0,
-            1 / (0)
+            1/0
         );
     }
     expect_stdout: true
@@ -250,22 +250,27 @@ unsafe_constant: {
 
 unsafe_object: {
     options = {
-        evaluate  : true,
+        evaluate: true,
-        unsafe    : true
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
     }
     input: {
+        var o = { a: 1 };
         console.log(
-            ({a:1}) + 1,
+            o + 1,
-            ({a:1}).a + 1,
+            o.a + 1,
-            ({a:1}).b + 1,
+            o.b + 1,
-            ({a:1}).a.b + 1
+            o.a.b + 1
         );
     }
     expect: {
+        var o = { a: 1 };
         console.log(
-            ({a:1}) + 1,
+            o + 1,
             2,
-            ({a:1}).b + 1,
+            o.b + 1,
             1..b + 1
         );
     }
@@ -274,22 +279,27 @@ unsafe_object: {
 
 unsafe_object_nested: {
     options = {
-        evaluate  : true,
+        evaluate: true,
-        unsafe    : true
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
     }
     input: {
+        var o = { a: { b: 1 } };
         console.log(
-            ({a:{b:1}}) + 1,
+            o + 1,
-            ({a:{b:1}}).a + 1,
+            o.a + 1,
-            ({a:{b:1}}).b + 1,
+            o.b + 1,
-            ({a:{b:1}}).a.b + 1
+            o.a.b + 1
         );
     }
     expect: {
+        var o = { a: { b: 1 } };
         console.log(
-            ({a:{b:1}}) + 1,
+            o + 1,
-            ({a:{b:1}}).a + 1,
+            o.a + 1,
-            ({a:{b:1}}).b + 1,
+            o.b + 1,
             2
         );
     }
@@ -298,21 +308,26 @@ unsafe_object_nested: {
 
 unsafe_object_complex: {
     options = {
-        evaluate  : true,
+        evaluate: true,
-        unsafe    : true
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
     }
     input: {
+        var o = { a: { b: 1 }, b: 1 };
         console.log(
-            ({a:{b:1},b:1}) + 1,
+            o + 1,
-            ({a:{b:1},b:1}).a + 1,
+            o.a + 1,
-            ({a:{b:1},b:1}).b + 1,
+            o.b + 1,
-            ({a:{b:1},b:1}).a.b + 1
+            o.a.b + 1
         );
     }
     expect: {
+        var o = { a: { b: 1 }, b: 1 };
         console.log(
-            ({a:{b:1},b:1}) + 1,
+            o + 1,
-            ({a:{b:1},b:1}).a + 1,
+            o.a + 1,
             2,
             2
         );
@@ -322,22 +337,27 @@ unsafe_object_complex: {
 
 unsafe_object_repeated: {
     options = {
-        evaluate  : true,
+        evaluate: true,
-        unsafe    : true
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
     }
     input: {
+        var o = { a: { b: 1 }, a: 1 };
         console.log(
-            ({a:{b:1},a:1}) + 1,
+            o + 1,
-            ({a:{b:1},a:1}).a + 1,
+            o.a + 1,
-            ({a:{b:1},a:1}).b + 1,
+            o.b + 1,
-            ({a:{b:1},a:1}).a.b + 1
+            o.a.b + 1
         );
     }
     expect: {
+        var o = { a: { b: 1 }, a: 1 };
         console.log(
-            ({a:{b:1},a:1}) + 1,
+            o + 1,
             2,
-            ({a:{b:1},a:1}).b + 1,
+            o.b + 1,
             1..b + 1
         );
     }
@@ -347,6 +367,7 @@ unsafe_object_repeated: {
 unsafe_object_accessor: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unsafe: true,
     }
@@ -370,10 +391,11 @@ unsafe_object_accessor: {
     }
 }
 
-unsafe_function: {
+prop_function: {
     options = {
-        evaluate  : true,
+        evaluate: true,
-        unsafe    : true
+        properties: true,
+        side_effects: true,
     }
     input: {
         console.log(
@@ -386,9 +408,9 @@ unsafe_function: {
     expect: {
         console.log(
             ({a:{b:1},b:function(){}}) + 1,
-            ({a:{b:1},b:function(){}}).a + 1,
+            ({b:1}) + 1,
-            ({a:{b:1},b:function(){}}).b + 1,
+            function(){} + 1,
-            ({a:{b:1},b:function(){}}).a.b + 1
+            2
         );
     }
     expect_stdout: true
@@ -614,10 +636,11 @@ unsafe_string_bad_index: {
     expect_stdout: true
 }
 
-unsafe_prototype_function: {
+prototype_function: {
     options = {
-        evaluate  : true,
+        evaluate: true,
-        unsafe    : true
+        properties: true,
+        side_effects: true,
     }
     input: {
         var a = ({valueOf: 0}) < 1;
@@ -636,25 +659,28 @@ unsafe_prototype_function: {
         var d = ({toString: 0}) + "";
         var e = (({valueOf: 0}) + "")[2];
         var f = (({toString: 0}) + "")[2];
-        var g = ({valueOf: 0}).valueOf();
+        var g = 0();
-        var h = "" + ({toString: 0});
+        var h = 0();
     }
 }
 
 call_args: {
     options = {
         evaluate: true,
+        inline: true,
+        reduce_funcs: true,
         reduce_vars: true,
+        toplevel: true,
     }
     input: {
-        const a = 1;
+        var a = 1;
         console.log(a);
         +function(a) {
             return a;
         }(a);
     }
     expect: {
-        const a = 1;
+        var a = 1;
         console.log(1);
         +(1, 1);
     }
@@ -664,19 +690,21 @@ call_args: {
 call_args_drop_param: {
     options = {
         evaluate: true,
+        inline: true,
         keep_fargs: false,
+        reduce_funcs: true,
         reduce_vars: true,
+        toplevel: true,
         unused: true,
     }
     input: {
-        const a = 1;
+        var a = 1;
         console.log(a);
         +function(a) {
             return a;
         }(a, b);
     }
     expect: {
-        const a = 1;
         console.log(1);
         +(b, 1);
     }
@@ -779,13 +807,15 @@ unsafe_charAt_noop: {
     input: {
         console.log(
             s.charAt(0),
-            "string".charAt(x)
+            "string".charAt(x),
+            (typeof x).charAt()
         );
     }
     expect: {
         console.log(
             s.charAt(0),
-            "string".charAt(x)
+            "string".charAt(x),
+            (typeof x)[0]
         );
     }
 }
@@ -802,3 +832,416 @@ issue_1649: {
     }
     expect_stdout: "-2";
 }
+
+issue_1760_1: {
+    options = {
+        evaluate: true,
+    }
+    input: {
+        !function(a) {
+            try {
+                throw 0;
+            } catch (NaN) {
+                a = +"foo";
+            }
+            console.log(a);
+        }();
+    }
+    expect: {
+        !function(a) {
+            try {
+                throw 0;
+            } catch (NaN) {
+                a = 0 / 0;
+            }
+            console.log(a);
+        }();
+    }
+    expect_stdout: "NaN"
+}
+
+issue_1760_2: {
+    options = {
+        evaluate: true,
+        keep_infinity: true,
+    }
+    input: {
+        !function(a) {
+            try {
+                throw 0;
+            } catch (Infinity) {
+                a = 123456789 / 0;
+            }
+            console.log(a);
+        }();
+    }
+    expect: {
+        !function(a) {
+            try {
+                throw 0;
+            } catch (Infinity) {
+                a = 1 / 0;
+            }
+            console.log(a);
+        }();
+    }
+    expect_stdout: "Infinity"
+}
+
+delete_expr_1: {
+    options = {
+        booleans: true,
+        evaluate: true,
+    }
+    input: {
+        console.log(delete undefined);
+        console.log(delete void 0);
+        console.log(delete Infinity);
+        console.log(delete (1 / 0));
+        console.log(delete NaN);
+        console.log(delete (0 / 0));
+    }
+    expect: {
+        console.log(delete undefined);
+        console.log((void 0, !0));
+        console.log(delete Infinity);
+        console.log((1 / 0, !0));
+        console.log(delete NaN);
+        console.log((0 / 0, !0));
+    }
+    expect_stdout: true
+}
+
+delete_expr_2: {
+    options = {
+        booleans: true,
+        evaluate: true,
+        keep_infinity: true,
+    }
+    input: {
+        console.log(delete undefined);
+        console.log(delete void 0);
+        console.log(delete Infinity);
+        console.log(delete (1 / 0));
+        console.log(delete NaN);
+        console.log(delete (0 / 0));
+    }
+    expect: {
+        console.log(delete undefined);
+        console.log((void 0, !0));
+        console.log(delete Infinity);
+        console.log((1 / 0, !0));
+        console.log(delete NaN);
+        console.log((0 / 0, !0));
+    }
+    expect_stdout: true
+}
+
+delete_binary_1: {
+    options = {
+        booleans: true,
+        evaluate: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(delete (true && undefined));
+        console.log(delete (true && void 0));
+        console.log(delete (true && Infinity));
+        console.log(delete (true && (1 / 0)));
+        console.log(delete (true && NaN));
+        console.log(delete (true && (0 / 0)));
+    }
+    expect: {
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+    }
+    expect_stdout: true
+}
+
+delete_binary_2: {
+    options = {
+        booleans: true,
+        evaluate: true,
+        keep_infinity: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(delete (false || undefined));
+        console.log(delete (false || void 0));
+        console.log(delete (false || Infinity));
+        console.log(delete (false || (1 / 0)));
+        console.log(delete (false || NaN));
+        console.log(delete (false || (0 / 0)));
+    }
+    expect: {
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+    }
+    expect_stdout: true
+}
+
+Infinity_NaN_undefined_LHS: {
+    beautify = {
+        beautify: true,
+    }
+    input: {
+        function f() {
+            Infinity = Infinity;
+            ++Infinity;
+            Infinity--;
+            NaN *= NaN;
+            ++NaN;
+            NaN--;
+            undefined |= undefined;
+            ++undefined;
+            undefined--;
+        }
+    }
+    expect_exact: [
+        "function f() {",
+        "    Infinity = 1 / 0;",
+        "    ++Infinity;",
+        "    Infinity--;",
+        "    NaN *= NaN;",
+        "    ++NaN;",
+        "    NaN--;",
+        "    undefined |= void 0;",
+        "    ++undefined;",
+        "    undefined--;",
+        "}",
+    ]
+}
+
+issue_1964_1: {
+    options = {
+        evaluate: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unsafe_regexp: false,
+        unused: true,
+    }
+    input: {
+        function f() {
+            var long_variable_name = /\s/;
+            console.log(long_variable_name.source);
+            return "a b c".split(long_variable_name)[1];
+        }
+        console.log(f());
+    }
+    expect: {
+        function f() {
+            var long_variable_name = /\s/;
+            console.log(long_variable_name.source);
+            return "a b c".split(long_variable_name)[1];
+        }
+        console.log(f());
+    }
+    expect_stdout: [
+        "\\s",
+        "b",
+    ]
+}
+
+issue_1964_2: {
+    options = {
+        evaluate: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unsafe_regexp: true,
+        unused: true,
+    }
+    input: {
+        function f() {
+            var long_variable_name = /\s/;
+            console.log(long_variable_name.source);
+            return "a b c".split(long_variable_name)[1];
+        }
+        console.log(f());
+    }
+    expect: {
+        function f() {
+            console.log(/\s/.source);
+            return "a b c".split(/\s/)[1];
+        }
+        console.log(f());
+    }
+    expect_stdout: [
+        "\\s",
+        "b",
+    ]
+}
+
+array_slice_index: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log([1,2,3].slice(1)[1]);
+    }
+    expect: {
+        console.log(3);
+    }
+    expect_stdout: "3"
+}
+
+string_charCodeAt: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log("foo".charCodeAt("bar".length));
+    }
+    expect: {
+        console.log(NaN);
+    }
+    expect_stdout: "NaN"
+}
+
+issue_2207_1: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log(String.fromCharCode(65));
+        console.log(Math.max(3, 6, 2, 7, 3, 4));
+        console.log(Math.cos(1.2345));
+        console.log(Math.cos(1.2345) - Math.sin(4.321));
+        console.log(Math.pow(Math.PI, Math.E - Math.LN10));
+    }
+    expect: {
+        console.log("A");
+        console.log(7);
+        console.log(Math.cos(1.2345));
+        console.log(1.2543732512566947);
+        console.log(1.6093984514472044);
+    }
+    expect_stdout: true
+}
+
+issue_2207_2: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log(Math.E);
+        console.log(Math.LN10);
+        console.log(Math.LN2);
+        console.log(Math.LOG2E);
+        console.log(Math.LOG10E);
+        console.log(Math.PI);
+        console.log(Math.SQRT1_2);
+        console.log(Math.SQRT2);
+    }
+    expect: {
+        console.log(Math.E);
+        console.log(Math.LN10);
+        console.log(Math.LN2);
+        console.log(Math.LOG2E);
+        console.log(Math.LOG10E);
+        console.log(Math.PI);
+        console.log(Math.SQRT1_2);
+        console.log(Math.SQRT2);
+    }
+    expect_stdout: true
+}
+
+issue_2207_3: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log(Number.MAX_VALUE);
+        console.log(Number.MIN_VALUE);
+        console.log(Number.NaN);
+        console.log(Number.NEGATIVE_INFINITY);
+        console.log(Number.POSITIVE_INFINITY);
+    }
+    expect: {
+        console.log(Number.MAX_VALUE);
+        console.log(5e-324);
+        console.log(NaN);
+        console.log(-1/0);
+        console.log(1/0);
+    }
+    expect_stdout: true
+}
+
+issue_2231_1: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log(Object.keys(void 0));
+    }
+    expect: {
+        console.log(Object.keys(void 0));
+    }
+    expect_stdout: true
+}
+
+issue_2231_2: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log(Object.getOwnPropertyNames(null));
+    }
+    expect: {
+        console.log(Object.getOwnPropertyNames(null));
+    }
+    expect_stdout: true
+}
+
+self_comparison_1: {
+    options = {
+        evaluate: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        var o = { n: NaN };
+        console.log(o.n == o.n, o.n === o.n, o.n != o.n, o.n !== o.n, typeof o.n);
+    }
+    expect: {
+        console.log(false, false, true, true, "number");
+    }
+    expect_stdout: "false false true true 'number'"
+}
+
+self_comparison_2: {
+    options = {
+        evaluate: true,
+        hoist_props: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = { n: NaN };
+        console.log(o.n == o.n, o.n === o.n, o.n != o.n, o.n !== o.n, typeof o.n);
+    }
+    expect: {
+        console.log(false, false, true, true, "number");
+    }
+    expect_stdout: "false false true true 'number'"
+}

test/compress/functions.js

@@ -19,8 +19,10 @@ iifes_returning_constants_keep_fargs_true: {
         booleans      : true,
         if_return     : true,
         join_vars     : true,
+        reduce_funcs  : true,
         reduce_vars   : true,
         cascade       : true,
+        inline        : true,
     }
     input: {
         (function(){ return -1.23; }());
@@ -54,8 +56,10 @@ iifes_returning_constants_keep_fargs_false: {
         booleans      : true,
         if_return     : true,
         join_vars     : true,
+        reduce_funcs  : true,
         reduce_vars   : true,
         cascade       : true,
+        inline        : true,
     }
     input: {
         (function(){ return -1.23; }());
@@ -82,6 +86,7 @@ issue_485_crashing_1530: {
         conditionals: true,
         dead_code: true,
         evaluate: true,
+        inline: true,
     }
     input: {
         (function(a) {
@@ -93,3 +98,459 @@ issue_485_crashing_1530: {
         this, void 0;
     }
 }
+
+issue_1841_1: {
+    options = {
+        keep_fargs: false,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        var b = 10;
+        !function(arg) {
+            for (var key in "hi")
+                var n = arg.baz, n = [ b = 42 ];
+        }(--b);
+        console.log(b);
+    }
+    expect: {
+        var b = 10;
+        !function() {
+            for (var key in "hi")
+                b = 42;
+        }(--b);
+        console.log(b);
+    }
+    expect_exact: "42"
+}
+
+issue_1841_2: {
+    options = {
+        keep_fargs: false,
+        pure_getters: false,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        var b = 10;
+        !function(arg) {
+            for (var key in "hi")
+                var n = arg.baz, n = [ b = 42 ];
+        }(--b);
+        console.log(b);
+    }
+    expect: {
+        var b = 10;
+        !function(arg) {
+            for (var key in "hi")
+                arg.baz, b = 42;
+        }(--b);
+        console.log(b);
+    }
+    expect_exact: "42"
+}
+
+function_returning_constant_literal: {
+    options = {
+        inline: true,
+        passes: 2,
+        properties: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function greeter() {
+            return { message: 'Hello there' };
+        }
+        var greeting = greeter();
+        console.log(greeting.message);
+    }
+    expect: {
+        console.log("Hello there");
+    }
+    expect_stdout: "Hello there"
+}
+
+hoist_funs: {
+    options = {
+        hoist_funs: true,
+    }
+    input: {
+        console.log(1, typeof f, typeof g);
+        if (console.log(2, typeof f, typeof g))
+            console.log(3, typeof f, typeof g);
+        else {
+            console.log(4, typeof f, typeof g);
+            function f() {}
+            console.log(5, typeof f, typeof g);
+        }
+        function g() {}
+        console.log(6, typeof f, typeof g);
+    }
+    expect: {
+        function f() {}
+        function g() {}
+        console.log(1, typeof f, typeof g);
+        if (console.log(2, typeof f, typeof g))
+            console.log(3, typeof f, typeof g);
+        else {
+            console.log(4, typeof f, typeof g);
+            console.log(5, typeof f, typeof g);
+        }
+        console.log(6, typeof f, typeof g);
+    }
+    expect_stdout: [
+        "1 'function' 'function'",
+        "2 'function' 'function'",
+        "4 'function' 'function'",
+        "5 'function' 'function'",
+        "6 'function' 'function'",
+    ]
+    node_version: "<=4"
+}
+
+hoist_funs_strict: {
+    options = {
+        hoist_funs: true,
+    }
+    input: {
+        "use strict";
+        console.log(1, typeof f, typeof g);
+        if (console.log(2, typeof f, typeof g))
+            console.log(3, typeof f, typeof g);
+        else {
+            console.log(4, typeof f, typeof g);
+            function f() {}
+            console.log(5, typeof f, typeof g);
+        }
+        function g() {}
+        console.log(6, typeof f, typeof g);
+    }
+    expect: {
+        "use strict";
+        function g() {}
+        console.log(1, typeof f, typeof g);
+        if (console.log(2, typeof f, typeof g))
+            console.log(3, typeof f, typeof g);
+        else {
+            console.log(4, typeof f, typeof g);
+            function f() {}
+            console.log(5, typeof f, typeof g);
+        }
+        console.log(6, typeof f, typeof g);
+    }
+    expect_stdout: [
+        "1 'undefined' 'function'",
+        "2 'undefined' 'function'",
+        "4 'function' 'function'",
+        "5 'function' 'function'",
+        "6 'undefined' 'function'",
+    ]
+    node_version: ">=4"
+}
+
+issue_203: {
+    options = {
+        keep_fargs: false,
+        side_effects: true,
+        unsafe_Func: true,
+        unused: true,
+    }
+    input: {
+        var m = {};
+        var fn = Function("require", "module", "exports", "module.exports = 42;");
+        fn(null, m, m.exports);
+        console.log(m.exports);
+    }
+    expect: {
+        var m = {};
+        var fn = Function("n,o", "o.exports=42");
+        fn(null, m, m.exports);
+        console.log(m.exports);
+    }
+    expect_stdout: "42"
+}
+
+no_webkit: {
+    beautify = {
+        webkit: false,
+    }
+    input: {
+        console.log(function() {
+            1 + 1;
+        }.a = 1);
+    }
+    expect_exact: "console.log(function(){1+1}.a=1);"
+    expect_stdout: "1"
+}
+
+webkit: {
+    beautify = {
+        webkit: true,
+    }
+    input: {
+        console.log(function() {
+            1 + 1;
+        }.a = 1);
+    }
+    expect_exact: "console.log((function(){1+1}).a=1);"
+    expect_stdout: "1"
+}
+
+issue_2084: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        evaluate: true,
+        inline: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var c = 0;
+        !function() {
+            !function(c) {
+                c = 1 + c;
+                var c = 0;
+                function f14(a_1) {
+                    if (c = 1 + c, 0 !== 23..toString())
+                        c = 1 + c, a_1 && (a_1[0] = 0);
+                }
+                f14();
+            }(-1);
+        }();
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        !function(c) {
+            c = 1 + c,
+            c = 1 + (c = 0),
+            0 !== 23..toString() && (c = 1 + c);
+        }(-1),
+        console.log(c);
+    }
+    expect_stdout: "0"
+}
+
+issue_2097: {
+    options = {
+        negate_iife: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function f() {
+            try {
+                throw 0;
+            } catch (e) {
+                console.log(arguments[0]);
+            }
+        }
+        f(1);
+    }
+    expect: {
+        !function() {
+            try {
+                throw 0;
+            } catch (e) {
+                console.log(arguments[0]);
+            }
+        }(1);
+    }
+    expect_stdout: "1"
+}
+
+issue_2101: {
+    options = {
+        inline: true,
+    }
+    input: {
+        a = {};
+        console.log(function() {
+            return function() {
+                return this.a;
+            }();
+        }() === function() {
+            return a;
+        }());
+    }
+    expect: {
+        a = {};
+        console.log(function() {
+            return this.a;
+        }() === a);
+    }
+    expect_stdout: "true"
+}
+
+inner_ref: {
+    options = {
+        inline: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(a) {
+            return function() {
+                return a;
+            }();
+        }(1), function(a) {
+            return function(a) {
+                return a;
+            }();
+        }(2));
+    }
+    expect: {
+        console.log(function(a) {
+            return a;
+        }(1), function(a) {
+            return a;
+        }());
+    }
+    expect_stdout: "1 undefined"
+}
+
+issue_2107: {
+    options = {
+        cascade: true,
+        collapse_vars: true,
+        inline: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var c = 0;
+        !function() {
+            c++;
+        }(c++ + new function() {
+            this.a = 0;
+            var a = (c = c + 1) + (c = 1 + c);
+            return c++ + a;
+        }());
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        c++, new function() {
+            this.a = 0, c = 1 + (c += 1), c++;
+        }(), c++, console.log(c);
+    }
+    expect_stdout: "5"
+}
+
+issue_2114_1: {
+    options = {
+        collapse_vars: true,
+        if_return: true,
+        inline: true,
+        keep_fargs: false,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var c = 0;
+        !function(a) {
+            a = 0;
+        }([ {
+            0: c = c + 1,
+            length: c = 1 + c
+        }, typeof void function a() {
+            var b = function f1(a) {
+            }(b && (b.b += (c = c + 1, 0)));
+        }() ]);
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        c = 1 + (c += 1), function() {
+            var b = void (b && (b.b += (c += 1, 0)));
+        }();
+        console.log(c);
+    }
+    expect_stdout: "2"
+}
+
+issue_2114_2: {
+    options = {
+        collapse_vars: true,
+        if_return: true,
+        inline: true,
+        keep_fargs: false,
+        passes: 2,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var c = 0;
+        !function(a) {
+            a = 0;
+        }([ {
+            0: c = c + 1,
+            length: c = 1 + c
+        }, typeof void function a() {
+            var b = function f1(a) {
+            }(b && (b.b += (c = c + 1, 0)));
+        }() ]);
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        c = 1 + (c += 1), function() {
+            var b = void (b && (b.b += (c += 1, 0)));
+        }();
+        console.log(c);
+    }
+    expect_stdout: "2"
+}
+
+issue_2428: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        passes: 3,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        function bar(k) {
+            console.log(k);
+        }
+        function foo(x) {
+            return bar(x);
+        }
+        function baz(a) {
+            foo(a);
+        }
+        baz(42);
+        baz("PASS");
+    }
+    expect: {
+        function baz(a) {
+            console.log(a);
+        }
+        baz(42);
+        baz("PASS");
+    }
+    expect_stdout: [
+        "42",
+        "PASS",
+    ]
+}

test/compress/global_defs.js

@@ -37,6 +37,7 @@ object: {
                 VALUE: 42,
             },
         },
+        side_effects: true,
         unsafe: true,
     }
     input: {
@@ -120,7 +121,7 @@ mixed: {
         properties: true,
     }
     input: {
-        const FOO = { BAR: 0 };
+        var FOO = { BAR: 0 };
         console.log(FOO.BAR);
         console.log(++CONFIG.DEBUG);
         console.log(++CONFIG.VALUE);
@@ -130,7 +131,7 @@ mixed: {
         console.log(CONFIG);
     }
     expect: {
-        const FOO = { BAR: 0 };
+        var FOO = { BAR: 0 };
         console.log("moo");
         console.log(++CONFIG.DEBUG);
         console.log(++CONFIG.VALUE);
@@ -140,8 +141,58 @@ mixed: {
         console.log(CONFIG);
     }
     expect_warnings: [
-        'WARN: global_defs CONFIG.VALUE redefined [test/compress/global_defs.js:126,22]',
         'WARN: global_defs CONFIG.VALUE redefined [test/compress/global_defs.js:127,22]',
-        'WARN: global_defs CONFIG.VALUE redefined [test/compress/global_defs.js:129,8]',
+        'WARN: global_defs CONFIG.VALUE redefined [test/compress/global_defs.js:128,22]',
+        'WARN: global_defs CONFIG.VALUE redefined [test/compress/global_defs.js:130,8]',
     ]
 }
+
+issue_1801: {
+    options = {
+        booleans: true,
+        global_defs: {
+            "CONFIG.FOO.BAR": true,
+        },
+    }
+    input: {
+        console.log(CONFIG.FOO.BAR);
+    }
+    expect: {
+        console.log(!0);
+    }
+}
+
+issue_1986: {
+    options = {
+        global_defs: {
+            "@alert": "console.log",
+        },
+    }
+    input: {
+        alert(42);
+    }
+    expect: {
+        console.log(42);
+    }
+}
+
+issue_2167: {
+    options = {
+        conditionals: true,
+        dead_code: true,
+        evaluate: true,
+        global_defs: {
+            "@isDevMode": "function(){}",
+        },
+        side_effects: true,
+    }
+    input: {
+        if (isDevMode()) {
+            greetOverlord();
+        }
+        doWork();
+    }
+    expect: {
+        doWork();
+    }
+}

test/compress/hoist_props.js

@@ -0,0 +1,502 @@
+issue_2377_1: {
+    options = {
+        evaluate: true,
+        inline: true,
+        hoist_props: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var obj = {
+            foo: 1,
+            bar: 2,
+            square: function(x) {
+                return x * x;
+            },
+            cube: function(x) {
+                return x * x * x;
+            },
+        };
+        console.log(obj.foo, obj.cube(3));
+    }
+    expect: {
+        var obj_foo = 1, obj_cube = function(x) {
+            return x * x * x;
+        };
+        console.log(obj_foo, obj_cube(3));
+    }
+    expect_stdout: "1 27"
+}
+
+issue_2377_2: {
+    options = {
+        evaluate: true,
+        inline: true,
+        hoist_props: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var obj = {
+            foo: 1,
+            bar: 2,
+            square: function(x) {
+                return x * x;
+            },
+            cube: function(x) {
+                return x * x * x;
+            },
+        };
+        console.log(obj.foo, obj.cube(3));
+    }
+    expect: {
+        console.log(1, function(x) {
+            return x * x * x;
+        }(3));
+    }
+    expect_stdout: "1 27"
+}
+
+issue_2377_3: {
+    options = {
+        evaluate: true,
+        inline: true,
+        hoist_props: true,
+        passes: 3,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var obj = {
+            foo: 1,
+            bar: 2,
+            square: function(x) {
+                return x * x;
+            },
+            cube: function(x) {
+                return x * x * x;
+            },
+        };
+        console.log(obj.foo, obj.cube(3));
+    }
+    expect: {
+        console.log(1, 27);
+    }
+    expect_stdout: "1 27"
+}
+
+direct_access_1: {
+    options = {
+        hoist_props: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a = 0;
+        var obj = {
+            a: 1,
+            b: 2,
+        };
+        for (var k in obj) a++;
+        console.log(a, obj.a);
+    }
+    expect: {
+        var a = 0;
+        var obj = {
+            a: 1,
+            b: 2,
+        };
+        for (var k in obj) a++;
+        console.log(a, obj.a);
+    }
+    expect_stdout: "2 1"
+}
+
+direct_access_2: {
+    options = {
+        hoist_props: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = { a: 1 };
+        var f = function(k) {
+            if (o[k]) return "PASS";
+        };
+        console.log(f("a"));
+    }
+    expect: {
+        var o = { a: 1 };
+        console.log(function(k) {
+            if (o[k]) return "PASS";
+        }("a"));
+    }
+    expect_stdout: "PASS"
+}
+
+direct_access_3: {
+    options = {
+        hoist_props: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = { a: 1 };
+        o.b;
+        console.log(o.a);
+    }
+    expect: {
+        var o = { a: 1 };
+        o.b;
+        console.log(o.a);
+    }
+    expect_stdout: "1"
+}
+
+single_use: {
+    options = {
+        hoist_props: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var obj = {
+            bar: function() {
+                return 42;
+            },
+        };
+        console.log(obj.bar());
+    }
+    expect: {
+        console.log({
+            bar: function() {
+                return 42;
+            },
+        }.bar());
+    }
+}
+
+name_collision_1: {
+    options = {
+        hoist_props: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        var obj_foo = 1;
+        var obj_bar = 2;
+        function f() {
+            var obj = {
+                foo: 3,
+                bar: 4,
+                "b-r": 5,
+                "b+r": 6,
+                "b!r": 7,
+            };
+            console.log(obj_foo, obj.foo, obj.bar, obj["b-r"], obj["b+r"], obj["b!r"]);
+        }
+        f();
+    }
+    expect: {
+        var obj_foo = 1;
+        var obj_bar = 2;
+        function f() {
+            var obj_foo$0 = 3,
+                obj_bar = 4,
+                obj_b_r = 5,
+                obj_b_r$0 = 6,
+                obj_b_r$1 = 7;
+            console.log(obj_foo, obj_foo$0, obj_bar, obj_b_r, obj_b_r$0, obj_b_r$1);
+        }
+        f();
+    }
+    expect_stdout: "1 3 4 5 6 7"
+}
+
+name_collision_2: {
+    options = {
+        hoist_props: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        var o = {
+            p: 1,
+            0: function(x) {
+                return x;
+            },
+            1: function(x) {
+                return x + 1;
+            }
+        }, o__$0 = 2, o__$1 = 3;
+        console.log(o.p === o.p, o[0](4), o[1](5), o__$0, o__$1);
+    }
+    expect: {
+        var o_p = 1,
+            o__ = function(x) {
+                return x;
+            },
+            o__$2 = function(x) {
+                return x + 1;
+            },
+            o__$0 = 2,
+            o__$1 = 3;
+        console.log(o_p === o_p, o__(4), o__$2(5), o__$0, o__$1);
+    }
+    expect_stdout: "true 4 6 2 3"
+}
+
+name_collision_3: {
+    options = {
+        hoist_props: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        var o = {
+            p: 1,
+            0: function(x) {
+                return x;
+            },
+            1: function(x) {
+                return x + 1;
+            }
+        }, o__$0 = 2, o__$1 = 3;
+        console.log(o.p === o.p, o[0](4), o[1](5));
+    }
+    expect: {
+        var o_p = 1,
+            o__ = function(x) {
+                return x;
+            },
+            o__$2 = function(x) {
+                return x + 1;
+            },
+            o__$0 = 2,
+            o__$1 = 3;
+        console.log(o_p === o_p, o__(4), o__$2(5));
+    }
+    expect_stdout: "true 4 6"
+}
+
+contains_this_1: {
+    options = {
+        evaluate: true,
+        hoist_props: true,
+        inline: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            u: function() {
+                return this === this;
+            },
+            p: 1
+        };
+        console.log(o.p, o.p);
+    }
+    expect: {
+        console.log(1, 1);
+    }
+    expect_stdout: "1 1"
+}
+
+contains_this_2: {
+    options = {
+        evaluate: true,
+        hoist_props: true,
+        inline: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            u: function() {
+                return this === this;
+            },
+            p: 1
+        };
+        console.log(o.p, o.p, o.u);
+    }
+    expect: {
+        console.log(1, 1, function() {
+            return this === this;
+        });
+    }
+    expect_stdout: true
+}
+
+contains_this_3: {
+    options = {
+        evaluate: true,
+        hoist_props: true,
+        inline: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            u: function() {
+                return this === this;
+            },
+            p: 1
+        };
+        console.log(o.p, o.p, o.u());
+    }
+    expect: {
+        var o = {
+            u: function() {
+                return this === this;
+            },
+            p: 1
+        };
+        console.log(o.p, o.p, o.u());
+    }
+    expect_stdout: "1 1 true"
+}
+
+new_this: {
+    options = {
+        evaluate: true,
+        hoist_props: true,
+        inline: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+            f: function(a) {
+                this.b = a;
+            }
+        };
+        console.log(new o.f(o.a).b, o.b);
+    }
+    expect: {
+        console.log(new function(a) {
+            this.b = a;
+        }(1).b, 2);
+    }
+    expect_stdout: "1 2"
+}
+
+issue_2473_1: {
+    options = {
+        hoist_props: false,
+        reduce_vars: true,
+        top_retain: [ "x", "y" ],
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var x = {};
+        var y = [];
+        var z = {};
+    }
+    expect: {
+        var x = {};
+        var y = [];
+    }
+}
+
+issue_2473_2: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+        top_retain: [ "x", "y" ],
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var x = {};
+        var y = [];
+        var z = {};
+    }
+    expect: {
+        var x = {};
+        var y = [];
+    }
+}
+
+issue_2473_3: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+        top_retain: "o",
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(o.a, o.b);
+    }
+    expect: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(o.a, o.b);
+    }
+    expect_stdout: "1 2"
+}
+
+issue_2473_4: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+        top_retain: "o",
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var o = {
+                a: 1,
+                b: 2,
+            };
+            console.log(o.a, o.b);
+        })();
+    }
+    expect: {
+        (function() {
+            var o_a = 1, o_b = 2;
+            console.log(o_a, o_b);
+        })();
+    }
+    expect_stdout: "1 2"
+}

test/compress/hoist_vars.js

@@ -88,3 +88,24 @@ sequences_funs: {
         }
     }
 }
+
+issue_2295: {
+    options = {
+        collapse_vars: true,
+        hoist_vars: true,
+    }
+    input: {
+        function foo(o) {
+            var a = o.a;
+            if (a) return a;
+            var a = 1;
+        }
+    }
+    expect: {
+        function foo(o) {
+            var a = o.a;
+            if (a) return a;
+            a = 1;
+        }
+    }
+}

test/compress/if_return.js

@@ -302,3 +302,27 @@ issue_1437_conditionals: {
         }
     }
 }
+
+issue_512: {
+    options = {
+        conditionals: true,
+        if_return: true,
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        function a() {
+            if (b()) {
+                c();
+                return;
+            }
+            throw e;
+        }
+    }
+    expect: {
+        function a() {
+            if (!b()) throw e;
+            c();
+        }
+    }
+}

test/compress/issue-1034.js

@@ -71,11 +71,13 @@ non_hoisted_function_after_return_2a: {
         "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:51,16]",
         "WARN: Dropping unused variable a [test/compress/issue-1034.js:48,20]",
         "WARN: Dropping unused function nope [test/compress/issue-1034.js:55,21]",
+        "WARN: pass 0: last_count: Infinity, count: 37",
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:53,12]",
         "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:53,12]",
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:56,12]",
         "WARN: Dropping unused variable b [test/compress/issue-1034.js:51,20]",
         "WARN: Dropping unused variable c [test/compress/issue-1034.js:53,16]",
+        "WARN: pass 1: last_count: 37, count: 18",
     ]
 }
 
@@ -109,10 +111,146 @@ non_hoisted_function_after_return_2b: {
     }
     expect_warnings: [
         // duplicate warnings no longer emitted
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:95,16]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:97,16]",
-        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:95,16]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:97,16]",
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:97,12]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:99,12]",
-        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:97,12]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:99,12]",
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:101,12]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:103,12]",
+    ]
+}
+
+non_hoisted_function_after_return_strict: {
+    options = {
+        hoist_funs: false, dead_code: true, conditionals: true, comparisons: true,
+        evaluate: true, booleans: true, loops: true, unused: true, keep_fargs: true,
+        if_return: true, join_vars: true, cascade: true, side_effects: true
+    }
+    input: {
+        "use strict";
+        function foo(x) {
+            if (x) {
+                return bar();
+                not_called1();
+            } else {
+                return baz();
+                not_called2();
+            }
+            function bar() { return 7; }
+            return not_reached;
+            function UnusedFunction() {}
+            function baz() { return 8; }
+        }
+        console.log(foo(0), foo(1));
+    }
+    expect: {
+        "use strict";
+        function foo(x) {
+            return x ? bar() : baz();
+            function bar() { return 7 }
+            function baz() { return 8 }
+        }
+        console.log(foo(0), foo(1));
+    }
+    expect_stdout: "8 7"
+    expect_warnings: [
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:133,16]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:136,16]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:139,12]",
+        "WARN: Dropping unused function UnusedFunction [test/compress/issue-1034.js:140,21]",
+    ]
+}
+
+non_hoisted_function_after_return_2a_strict: {
+    options = {
+        hoist_funs: false, dead_code: true, conditionals: true, comparisons: true,
+        evaluate: true, booleans: true, loops: true, unused: true, keep_fargs: true,
+        if_return: true, join_vars: true, cascade: true, side_effects: true,
+        collapse_vars: false, passes: 2, warnings: "verbose"
+    }
+    input: {
+        "use strict";
+        function foo(x) {
+            if (x) {
+                return bar(1);
+                var a = not_called(1);
+            } else {
+                return bar(2);
+                var b = not_called(2);
+            }
+            var c = bar(3);
+            function bar(x) { return 7 - x; }
+            function nope() {}
+            return b || c;
+        }
+        console.log(foo(0), foo(1));
+    }
+    expect: {
+        "use strict";
+        function foo(x) {
+            return bar(x ? 1 : 2);
+            function bar(x) {
+                return 7 - x;
+            }
+        }
+        console.log(foo(0), foo(1));
+    }
+    expect_stdout: "5 6"
+    expect_warnings: [
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:175,16]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:175,16]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:178,16]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:178,16]",
+        "WARN: Dropping unused variable a [test/compress/issue-1034.js:175,20]",
+        "WARN: Dropping unused function nope [test/compress/issue-1034.js:182,21]",
+        "WARN: pass 0: last_count: Infinity, count: 48",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:180,12]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:180,12]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:183,12]",
+        "WARN: Dropping unused variable b [test/compress/issue-1034.js:178,20]",
+        "WARN: Dropping unused variable c [test/compress/issue-1034.js:180,16]",
+        "WARN: pass 1: last_count: 48, count: 29",
+    ]
+}
+
+non_hoisted_function_after_return_2b_strict: {
+    options = {
+        hoist_funs: false, dead_code: true, conditionals: true, comparisons: true,
+        evaluate: true, booleans: true, loops: true, unused: true, keep_fargs: true,
+        if_return: true, join_vars: true, cascade: true, side_effects: true,
+        collapse_vars: false
+    }
+    input: {
+        "use strict";
+        function foo(x) {
+            if (x) {
+                return bar(1);
+            } else {
+                return bar(2);
+                var b;
+            }
+            var c = bar(3);
+            function bar(x) {
+                return 7 - x;
+            }
+            return b || c;
+        }
+        console.log(foo(0), foo(1));
+    }
+    expect: {
+        "use strict";
+        function foo(x) {
+            return bar(x ? 1 : 2);
+            function bar(x) { return 7 - x; }
+        }
+        console.log(foo(0), foo(1));
+    }
+    expect_stdout: "5 6"
+    expect_warnings: [
+        // duplicate warnings no longer emitted
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:229,16]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:229,16]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:231,12]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:231,12]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:235,12]",
     ]
 }

test/compress/issue-1041.js

@@ -1,19 +1,7 @@
-const_declaration: {
-    options = {
-        evaluate: true
-    };
-
-    input: {
-        const goog = goog || {};
-    }
-    expect: {
-        const goog = goog || {};
-    }
-}
-
 const_pragma: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
     };
 
@@ -29,6 +17,7 @@ const_pragma: {
 not_const: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
     };
 

test/compress/issue-1052.js

@@ -1,90 +1,91 @@
 multiple_functions: {
-    options = { if_return: true, hoist_funs: false };
+    options = {
+        hoist_funs: false,
+        if_return: true,
+    }
     input: {
         ( function() {
             if ( !window ) {
                 return;
             }
-
             function f() {}
             function g() {}
         } )();
     }
     expect: {
         ( function() {
-            function f() {}
-            function g() {}
-
             // NOTE: other compression steps will reduce this
             // down to just `window`.
             if ( window );
+            function f() {}
+            function g() {}
         } )();
     }
 }
 
 single_function: {
-    options = { if_return: true, hoist_funs: false };
+    options = {
+        hoist_funs: false,
+        if_return: true,
+    }
     input: {
         ( function() {
             if ( !window ) {
                 return;
             }
-
             function f() {}
         } )();
     }
     expect: {
         ( function() {
-            function f() {}
-
             if ( window );
+            function f() {}
         } )();
     }
 }
 
 deeply_nested: {
-    options = { if_return: true, hoist_funs: false };
+    options = {
+        hoist_funs: false,
+        if_return: true,
+    }
     input: {
         ( function() {
             if ( !window ) {
                 return;
             }
-
             function f() {}
             function g() {}
-
             if ( !document ) {
                 return;
             }
-
             function h() {}
         } )();
     }
     expect: {
         ( function() {
-            function f() {}
-            function g() {}
-
-            function h() {}
-
             // NOTE: other compression steps will reduce this
             // down to just `window`.
             if ( window )
                 if (document);
+            function f() {}
+            function g() {}
+            function h() {}
         } )();
     }
 }
 
 not_hoisted_when_already_nested: {
-    options = { if_return: true, hoist_funs: false };
+    options = {
+        hoist_funs: false,
+        if_return: true,
+    }
     input: {
         ( function() {
             if ( !window ) {
                 return;
             }
-
             if ( foo ) function f() {}
-
         } )();
     }
     expect: {
@@ -94,3 +95,70 @@ not_hoisted_when_already_nested: {
         } )();
     }
 }
+
+defun_if_return: {
+    options = {
+        hoist_funs: false,
+        if_return: true,
+    }
+    input: {
+        function e() {
+            function f() {}
+            if (!window) return;
+            else function g() {}
+            function h() {}
+        }
+    }
+    expect: {
+        function e() {
+            function f() {}
+            if (window) function g() {}
+            function h() {}
+        }
+    }
+}
+
+defun_hoist_funs: {
+    options = {
+        hoist_funs: true,
+        if_return: true,
+    }
+    input: {
+        function e() {
+            function f() {}
+            if (!window) return;
+            else function g() {}
+            function h() {}
+        }
+    }
+    expect: {
+        function e() {
+            function f() {}
+            function g() {}
+            function h() {}
+            if (window);
+        }
+    }
+}
+
+defun_else_if_return: {
+    options = {
+        hoist_funs: false,
+        if_return: true,
+    }
+    input: {
+        function e() {
+            function f() {}
+            if (window) function g() {}
+            else return;
+            function h() {}
+        }
+    }
+    expect: {
+        function e() {
+            function f() {}
+            if (window) function g() {}
+            function h() {}
+        }
+    }
+}

test/compress/issue-1105.js

@@ -193,13 +193,15 @@ assorted_Infinity_NaN_undefined_in_with_scope: {
         cascade:       true,
         side_effects:  true,
         sequences:     false,
+        keep_infinity: false,
     }
     input: {
+        var f = console.log;
         var o = {
             undefined : 3,
             NaN       : 4,
             Infinity  : 5,
-        }
+        };
         if (o) {
             f(undefined, void 0);
             f(NaN, 0/0);
@@ -216,25 +218,88 @@ assorted_Infinity_NaN_undefined_in_with_scope: {
         }
     }
     expect: {
-        var o = {
+        var f = console.log, o = {
             undefined : 3,
             NaN       : 4,
             Infinity  : 5
-        }
+        };
         if (o) {
             f(void 0, void 0);
             f(NaN, NaN);
             f(1/0, 1/0);
-            f(-(1/0), -(1/0));
+            f(-1/0, -1/0);
             f(NaN, NaN);
         }
         with (o) {
             f(undefined, void 0);
             f(NaN, 0/0);
             f(Infinity, 1/0);
-            f(-Infinity, -(1/0));
+            f(-Infinity, -1/0);
             f(9 + undefined, 9 + void 0);
         }
     }
+    expect_stdout: true
 }
 
+assorted_Infinity_NaN_undefined_in_with_scope_keep_infinity: {
+    options = {
+        unused:        true,
+        evaluate:      true,
+        dead_code:     true,
+        conditionals:  true,
+        comparisons:   true,
+        booleans:      true,
+        hoist_funs:    true,
+        keep_fargs:    true,
+        if_return:     true,
+        join_vars:     true,
+        cascade:       true,
+        side_effects:  true,
+        sequences:     false,
+        keep_infinity: true,
+    }
+    input: {
+        var f = console.log;
+        var o = {
+            undefined : 3,
+            NaN       : 4,
+            Infinity  : 5,
+        };
+        if (o) {
+            f(undefined, void 0);
+            f(NaN, 0/0);
+            f(Infinity, 1/0);
+            f(-Infinity, -(1/0));
+            f(2 + 7 + undefined, 2 + 7 + void 0);
+        }
+        with (o) {
+            f(undefined, void 0);
+            f(NaN, 0/0);
+            f(Infinity, 1/0);
+            f(-Infinity, -(1/0));
+            f(2 + 7 + undefined, 2 + 7 + void 0);
+        }
+    }
+    expect: {
+        var f = console.log, o = {
+            undefined : 3,
+            NaN       : 4,
+            Infinity  : 5
+        };
+        if (o) {
+            f(void 0, void 0);
+            f(NaN, NaN);
+            f(Infinity, 1/0);
+            f(-Infinity, -1/0);
+            f(NaN, NaN);
+        }
+        with (o) {
+            f(undefined, void 0);
+            f(NaN, 0/0);
+            f(Infinity, 1/0);
+            f(-Infinity, -1/0);
+            f(9 + undefined, 9 + void 0);
+        }
+    }
+    expect_stdout: true
+}

test/compress/issue-1261.js

@@ -96,6 +96,13 @@ pure_function_calls_toplevel: {
             })();
         })();
 
+        // pure top-level calls will be dropped regardless of the leading comments position
+        var MyClass = /*#__PURE__*//*@class*/(function(){
+            function MyClass() {}
+            MyClass.prototype.method = function() {};
+            return MyClass;
+        })();
+
         // comment #__PURE__ comment
         bar(), baz(), quux();
         a.b(), /* @__PURE__ */ c.d.e(), f.g();
@@ -110,10 +117,12 @@ pure_function_calls_toplevel: {
         "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:92,37]",
         "WARN: Dropping unused variable iife2 [test/compress/issue-1261.js:92,16]",
         "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:90,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:100,8]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:107,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:101,31]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:108,31]",
         "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:84,33]",
         "WARN: Dropping unused variable iife1 [test/compress/issue-1261.js:84,12]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:100,45]",
+        "WARN: Dropping unused variable MyClass [test/compress/issue-1261.js:100,12]",
     ]
 }
 
@@ -148,29 +157,29 @@ should_warn: {
         baz();
     }
     expect_warnings: [
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:128,61]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:137,61]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:128,23]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:137,23]",
-        "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:128,23]",
+        "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:137,23]",
-        "WARN: Boolean || always true [test/compress/issue-1261.js:129,23]",
+        "WARN: Boolean || always true [test/compress/issue-1261.js:138,23]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:129,23]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:138,23]",
-        "WARN: Condition always true [test/compress/issue-1261.js:129,23]",
+        "WARN: Condition always true [test/compress/issue-1261.js:138,23]",
-        "WARN: Boolean || always true [test/compress/issue-1261.js:130,8]",
+        "WARN: Condition left of || always true [test/compress/issue-1261.js:139,8]",
-        "WARN: Condition always true [test/compress/issue-1261.js:130,8]",
+        "WARN: Condition always true [test/compress/issue-1261.js:139,8]",
-        "WARN: Boolean && always false [test/compress/issue-1261.js:131,23]",
+        "WARN: Boolean && always false [test/compress/issue-1261.js:140,23]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:131,23]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:140,23]",
-        "WARN: Condition always false [test/compress/issue-1261.js:131,23]",
+        "WARN: Condition always false [test/compress/issue-1261.js:140,23]",
-        "WARN: Boolean && always false [test/compress/issue-1261.js:132,8]",
+        "WARN: Condition left of && always false [test/compress/issue-1261.js:141,8]",
-        "WARN: Condition always false [test/compress/issue-1261.js:132,8]",
+        "WARN: Condition always false [test/compress/issue-1261.js:141,8]",
-        "WARN: + in boolean context always true [test/compress/issue-1261.js:133,23]",
+        "WARN: + in boolean context always true [test/compress/issue-1261.js:142,23]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:133,23]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:142,23]",
-        "WARN: Condition always true [test/compress/issue-1261.js:133,23]",
+        "WARN: Condition always true [test/compress/issue-1261.js:142,23]",
-        "WARN: + in boolean context always true [test/compress/issue-1261.js:134,8]",
+        "WARN: + in boolean context always true [test/compress/issue-1261.js:143,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:134,31]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:143,31]",
-        "WARN: Condition always true [test/compress/issue-1261.js:134,8]",
+        "WARN: Condition always true [test/compress/issue-1261.js:143,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:135,23]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:144,23]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:136,24]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:145,24]",
-        "WARN: Condition always true [test/compress/issue-1261.js:136,8]",
+        "WARN: Condition always true [test/compress/issue-1261.js:145,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:137,31]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:146,31]",
-        "WARN: Condition always false [test/compress/issue-1261.js:137,8]",
+        "WARN: Condition always false [test/compress/issue-1261.js:146,8]",
     ]
 }

test/compress/issue-1321.js

@@ -1,6 +1,8 @@
 issue_1321_no_debug: {
-    mangle_props = {
+    mangle = {
-        ignore_quoted: true
+        properties: {
+            keep_quoted: true,
+        },
     }
     input: {
         var x = {};
@@ -10,17 +12,19 @@ issue_1321_no_debug: {
     }
     expect: {
         var x = {};
-        x.b = 1;
+        x.x = 1;
-        x["a"] = 2 * x.b;
+        x["a"] = 2 * x.x;
-        console.log(x.b, x["a"]);
+        console.log(x.x, x["a"]);
     }
     expect_stdout: true
 }
 
 issue_1321_debug: {
-    mangle_props = {
+    mangle = {
-        ignore_quoted: true,
+        properties: {
-        debug: ""
+            debug: "",
+            keep_quoted: true,
+        },
     }
     input: {
         var x = {};
@@ -30,16 +34,18 @@ issue_1321_debug: {
     }
     expect: {
         var x = {};
-        x.a = 1;
+        x.x = 1;
-        x["_$foo$_"] = 2 * x.a;
+        x["_$foo$_"] = 2 * x.x;
-        console.log(x.a, x["_$foo$_"]);
+        console.log(x.x, x["_$foo$_"]);
     }
     expect_stdout: true
 }
 
 issue_1321_with_quoted: {
-    mangle_props = {
+    mangle = {
-        ignore_quoted: false
+        properties: {
+            keep_quoted: false,
+        },
     }
     input: {
         var x = {};
@@ -49,9 +55,9 @@ issue_1321_with_quoted: {
     }
     expect: {
         var x = {};
-        x.a = 1;
+        x.x = 1;
-        x["b"] = 2 * x.a;
+        x["o"] = 2 * x.x;
-        console.log(x.a, x["b"]);
+        console.log(x.x, x["o"]);
     }
     expect_stdout: true
 }

test/compress/issue-1446.js

@@ -1,6 +1,7 @@
 typeof_eq_undefined: {
     options = {
-        comparisons: true
+        comparisons: true,
+        typeofs: true,
     }
     input: {
         var a = typeof b != "undefined";
@@ -23,7 +24,8 @@ typeof_eq_undefined: {
 typeof_eq_undefined_ie8: {
     options = {
         comparisons: true,
-        screw_ie8: false
+        ie8: true,
+        typeofs: true,
     }
     input: {
         var a = typeof b != "undefined";
@@ -45,7 +47,8 @@ typeof_eq_undefined_ie8: {
 
 undefined_redefined: {
     options = {
-        comparisons: true
+        comparisons: true,
+        typeofs: true,
     }
     input: {
         function f(undefined) {
@@ -58,7 +61,8 @@ undefined_redefined: {
 
 undefined_redefined_mangle: {
     options = {
-        comparisons: true
+        comparisons: true,
+        typeofs: true,
     }
     mangle = {}
     input: {

test/compress/issue-1588.js

@@ -1,9 +1,9 @@
 screw_ie8: {
     options = {
-        screw_ie8: true,
+        ie8: false,
     }
     mangle = {
-        screw_ie8: true,
+        ie8: false,
     }
     input: {
         try { throw "foo"; } catch (x) { console.log(x); }
@@ -16,10 +16,10 @@ screw_ie8: {
 
 support_ie8: {
     options = {
-        screw_ie8: false,
+        ie8: true,
     }
     mangle = {
-        screw_ie8: false,
+        ie8: true,
     }
     input: {
         try { throw "foo"; } catch (x) { console.log(x); }
@@ -85,15 +85,3 @@ unsafe_undefined: {
     }
     expect_stdout: true
 }
-
-runtime_error: {
-    input: {
-        const a = 1;
-        console.log(a++);
-    }
-    expect: {
-        const a = 1;
-        console.log(a++);
-    }
-    expect_stdout: true
-}

test/compress/issue-1609.js

@@ -2,6 +2,7 @@ chained_evaluation_1: {
     options = {
         collapse_vars: true,
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -18,9 +19,7 @@ chained_evaluation_1: {
     expect: {
         (function() {
             (function() {
-                var c;
+                f(1).bar = 1;
-                c = f(1);
-                c.bar = 1;
             })();
         })();
     }
@@ -30,6 +29,7 @@ chained_evaluation_2: {
     options = {
         collapse_vars: true,
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -45,11 +45,9 @@ chained_evaluation_2: {
     }
     expect: {
         (function() {
-            var a = "long piece of string";
             (function() {
-                var c;
+                var b = "long piece of string";
-                c = f(a);
+                f(b).bar = b;
-                c.bar = a;
             })();
         })();
     }

test/compress/issue-1656.js

@@ -15,6 +15,7 @@ f7: {
         negate_iife: true,
         passes: 3,
         properties: true,
+        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         side_effects: true,
@@ -35,11 +36,11 @@ f7: {
         console.log(a, b);
     }
     expect_exact: [
-        "var a = 100, b = 10;",
+        "var b = 10;",
         "",
         "!function() {",
-        "    for (;b = a, !1; ) ;",
+        "    for (;b = 100, !1; ) ;",
-        "}(), console.log(a, b);",
+        "}(), console.log(100, b);",
     ]
     expect_stdout: true
 }

test/compress/issue-1673.js

@@ -1,5 +1,6 @@
 side_effects_catch: {
     options = {
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -34,6 +35,7 @@ side_effects_catch: {
 
 side_effects_else: {
     options = {
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -62,6 +64,7 @@ side_effects_else: {
 
 side_effects_finally: {
     options = {
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -70,6 +73,7 @@ side_effects_finally: {
         function f() {
             function g() {
                 try {
+                    x();
                 } catch (e) {
                 } finally {
                     console.log("PASS");
@@ -83,6 +87,7 @@ side_effects_finally: {
         function f() {
             (function() {
                 try {
+                    x();
                 } catch (e) {
                 } finally {
                     console.log("PASS");
@@ -96,6 +101,7 @@ side_effects_finally: {
 
 side_effects_label: {
     options = {
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -128,6 +134,7 @@ side_effects_label: {
 
 side_effects_switch: {
     options = {
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,

test/compress/issue-1704.js

@@ -1,10 +1,10 @@
 mangle_catch: {
     options = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: false,
     }
     mangle = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: false,
     }
     input: {
@@ -22,11 +22,11 @@ mangle_catch: {
 
 mangle_catch_ie8: {
     options = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: false,
     }
     mangle = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: false,
     }
     input: {
@@ -44,11 +44,11 @@ mangle_catch_ie8: {
 
 mangle_catch_var: {
     options = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: false,
     }
     mangle = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: false,
     }
     input: {
@@ -66,11 +66,11 @@ mangle_catch_var: {
 
 mangle_catch_var_ie8: {
     options = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: false,
     }
     mangle = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: false,
     }
     input: {
@@ -88,11 +88,11 @@ mangle_catch_var_ie8: {
 
 mangle_catch_toplevel: {
     options = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: true,
     }
     mangle = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: true,
     }
     input: {
@@ -110,11 +110,11 @@ mangle_catch_toplevel: {
 
 mangle_catch_ie8_toplevel: {
     options = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: true,
     }
     mangle = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: true,
     }
     input: {
@@ -132,11 +132,11 @@ mangle_catch_ie8_toplevel: {
 
 mangle_catch_var_toplevel: {
     options = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: true,
     }
     mangle = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: true,
     }
     input: {
@@ -154,11 +154,11 @@ mangle_catch_var_toplevel: {
 
 mangle_catch_var_ie8_toplevel: {
     options = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: true,
     }
     mangle = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: true,
     }
     input: {
@@ -176,11 +176,11 @@ mangle_catch_var_ie8_toplevel: {
 
 mangle_catch_redef_1: {
     options = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: false,
     }
     mangle = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: false,
     }
     input: {
@@ -198,11 +198,11 @@ mangle_catch_redef_1: {
 
 mangle_catch_redef_1_ie8: {
     options = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: false,
     }
     mangle = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: false,
     }
     input: {
@@ -220,11 +220,11 @@ mangle_catch_redef_1_ie8: {
 
 mangle_catch_redef_1_toplevel: {
     options = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: true,
     }
     mangle = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: true,
     }
     input: {
@@ -242,11 +242,11 @@ mangle_catch_redef_1_toplevel: {
 
 mangle_catch_redef_1_ie8_toplevel: {
     options = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: true,
     }
     mangle = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: true,
     }
     input: {
@@ -264,11 +264,11 @@ mangle_catch_redef_1_ie8_toplevel: {
 
 mangle_catch_redef_2: {
     options = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: false,
     }
     mangle = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: false,
     }
     input: {
@@ -285,11 +285,11 @@ mangle_catch_redef_2: {
 
 mangle_catch_redef_2_ie8: {
     options = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: false,
     }
     mangle = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: false,
     }
     input: {
@@ -306,11 +306,11 @@ mangle_catch_redef_2_ie8: {
 
 mangle_catch_redef_2_toplevel: {
     options = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: true,
     }
     mangle = {
-        screw_ie8: true,
+        ie8: false,
         toplevel: true,
     }
     input: {
@@ -327,11 +327,11 @@ mangle_catch_redef_2_toplevel: {
 
 mangle_catch_redef_2_ie8_toplevel: {
     options = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: true,
     }
     mangle = {
-        screw_ie8: false,
+        ie8: true,
         toplevel: true,
     }
     input: {

test/compress/issue-1733.js

@@ -0,0 +1,97 @@
+function_iife_catch: {
+    mangle = {
+        ie8: false,
+    }
+    input: {
+        function f(n) {
+            !function() {
+                try {
+                    throw 0;
+                } catch (n) {
+                    var a = 1;
+                    console.log(n, a);
+                }
+            }();
+        }
+        f();
+    }
+    expect_exact: "function f(o){!function(){try{throw 0}catch(c){var o=1;console.log(c,o)}}()}f();"
+    expect_stdout: "0 1"
+}
+
+function_iife_catch_ie8: {
+    mangle = {
+        ie8: true,
+    }
+    input: {
+        function f(n) {
+            !function() {
+                try {
+                    throw 0;
+                } catch (n) {
+                    var a = 1;
+                    console.log(n, a);
+                }
+            }();
+        }
+        f();
+    }
+    expect_exact: "function f(o){!function(){try{throw 0}catch(o){var c=1;console.log(o,c)}}()}f();"
+    expect_stdout: "0 1"
+}
+
+function_catch_catch: {
+    mangle = {
+        ie8: false,
+    }
+    input: {
+        var o = 0;
+        function f() {
+            try {
+                throw 1;
+            } catch (c) {
+                try {
+                    throw 2;
+                } catch (o) {
+                    var o = 3;
+                    console.log(o);
+                }
+            }
+            console.log(o);
+        }
+        f();
+    }
+    expect_exact: "var o=0;function f(){try{throw 1}catch(c){try{throw 2}catch(o){var o=3;console.log(o)}}console.log(o)}f();"
+    expect_stdout: [
+        "3",
+        "undefined",
+    ]
+}
+
+function_catch_catch_ie8: {
+    mangle = {
+        ie8: true,
+    }
+    input: {
+        var o = 0;
+        function f() {
+            try {
+                throw 1;
+            } catch (c) {
+                try {
+                    throw 2;
+                } catch (o) {
+                    var o = 3;
+                    console.log(o);
+                }
+            }
+            console.log(o);
+        }
+        f();
+    }
+    expect_exact: "var o=0;function f(){try{throw 1}catch(c){try{throw 2}catch(o){var o=3;console.log(o)}}console.log(o)}f();"
+    expect_stdout: [
+        "3",
+        "undefined",
+    ]
+}

test/compress/issue-1750.js

@@ -0,0 +1,54 @@
+case_1: {
+    options = {
+        dead_code: true,
+        evaluate: true,
+        switches: true,
+    }
+    input: {
+        var a = 0, b = 1;
+        switch (true) {
+          case a, true:
+          default:
+            b = 2;
+          case true:
+        }
+        console.log(a, b);
+    }
+    expect: {
+        var a = 0, b = 1;
+        switch (true) {
+          case a, true:
+            b = 2;
+        }
+        console.log(a, b);
+    }
+    expect_stdout: "0 2"
+}
+
+case_2: {
+    options = {
+        dead_code: true,
+        evaluate: true,
+        switches: true,
+    }
+    input: {
+        var a = 0, b = 1;
+        switch (0) {
+          default:
+            b = 2;
+          case a:
+            a = 3;
+          case 0:
+        }
+        console.log(a, b);
+    }
+    expect: {
+        var a = 0, b = 1;
+        switch (0) {
+          case a:
+            a = 3;
+        }
+        console.log(a, b);
+    }
+    expect_stdout: "3 1"
+}

test/compress/issue-1770.js

@@ -0,0 +1,245 @@
+mangle_props: {
+    mangle = {
+        properties: true,
+    }
+    input: {
+        var obj = {
+            undefined: 1,
+            NaN: 2,
+            Infinity: 3,
+            "-Infinity": 4,
+            null: 5,
+        };
+        console.log(
+            obj[void 0],
+            obj[undefined],
+            obj["undefined"],
+            obj[0/0],
+            obj[NaN],
+            obj["NaN"],
+            obj[1/0],
+            obj[Infinity],
+            obj["Infinity"],
+            obj[-1/0],
+            obj[-Infinity],
+            obj["-Infinity"],
+            obj[null],
+            obj["null"]
+        );
+    }
+    expect: {
+        var obj = {
+            undefined: 1,
+            NaN: 2,
+            Infinity: 3,
+            "-Infinity": 4,
+            null: 5,
+        };
+        console.log(
+            obj[void 0],
+            obj[void 0],
+            obj["undefined"],
+            obj[0/0],
+            obj[NaN],
+            obj["NaN"],
+            obj[1/0],
+            obj[1/0],
+            obj["Infinity"],
+            obj[-1/0],
+            obj[-1/0],
+            obj["-Infinity"],
+            obj[null],
+            obj["null"]
+        );
+    }
+    expect_stdout: "1 1 1 2 2 2 3 3 3 4 4 4 5 5"
+}
+
+numeric_literal: {
+    mangle = {
+        properties: true,
+    }
+    beautify = {
+        beautify: true,
+    }
+    input: {
+        var obj = {
+            0: 0,
+            "-0": 1,
+            42: 2,
+            "42": 3,
+            0x25: 4,
+            "0x25": 5,
+            1E42: 6,
+            "1E42": 7,
+            "1e+42": 8,
+        };
+        console.log(obj[-0], obj[-""], obj["-0"]);
+        console.log(obj[42], obj["42"]);
+        console.log(obj[0x25], obj["0x25"], obj[37], obj["37"]);
+        console.log(obj[1E42], obj["1E42"], obj["1e+42"]);
+    }
+    expect_exact: [
+        'var obj = {',
+        '    0: 0,',
+        '    "-0": 1,',
+        '    42: 2,',
+        '    "42": 3,',
+        '    37: 4,',
+        '    o: 5,',
+        '    1e42: 6,',
+        '    b: 7,',
+        '    "1e+42": 8',
+        '};',
+        '',
+        'console.log(obj[-0], obj[-""], obj["-0"]);',
+        '',
+        'console.log(obj[42], obj["42"]);',
+        '',
+        'console.log(obj[37], obj["o"], obj[37], obj["37"]);',
+        '',
+        'console.log(obj[1e42], obj["b"], obj["1e+42"]);',
+    ]
+    expect_stdout: [
+        "0 0 1",
+        "3 3",
+        "4 5 4 4",
+        "8 7 8",
+    ]
+}
+
+identifier: {
+    mangle = {
+        properties: true,
+    }
+    input: {
+        var obj = {
+            abstract: 1,
+            boolean: 2,
+            byte: 3,
+            char: 4,
+            class: 5,
+            double: 6,
+            enum: 7,
+            export: 8,
+            extends: 9,
+            final: 10,
+            float: 11,
+            goto: 12,
+            implements: 13,
+            import: 14,
+            int: 15,
+            interface: 16,
+            let: 17,
+            long: 18,
+            native: 19,
+            package: 20,
+            private: 21,
+            protected: 22,
+            public: 23,
+            short: 24,
+            static: 25,
+            super: 26,
+            synchronized: 27,
+            this: 28,
+            throws: 29,
+            transient: 30,
+            volatile: 31,
+            yield: 32,
+            false: 33,
+            null: 34,
+            true: 35,
+            break: 36,
+            case: 37,
+            catch: 38,
+            const: 39,
+            continue: 40,
+            debugger: 41,
+            default: 42,
+            delete: 43,
+            do: 44,
+            else: 45,
+            finally: 46,
+            for: 47,
+            function: 48,
+            if: 49,
+            in: 50,
+            instanceof: 51,
+            new: 52,
+            return: 53,
+            switch: 54,
+            throw: 55,
+            try: 56,
+            typeof: 57,
+            var: 58,
+            void: 59,
+            while: 60,
+            with: 61,
+        };
+    }
+    expect: {
+        var obj = {
+            e: 1,
+            t: 2,
+            n: 3,
+            a: 4,
+            i: 5,
+            o: 6,
+            r: 7,
+            l: 8,
+            s: 9,
+            c: 10,
+            f: 11,
+            u: 12,
+            d: 13,
+            h: 14,
+            p: 15,
+            b: 16,
+            v: 17,
+            w: 18,
+            y: 19,
+            g: 20,
+            m: 21,
+            k: 22,
+            x: 23,
+            j: 24,
+            z: 25,
+            q: 26,
+            A: 27,
+            B: 28,
+            C: 29,
+            D: 30,
+            F: 31,
+            G: 32,
+            false: 33,
+            null: 34,
+            true: 35,
+            H: 36,
+            I: 37,
+            J: 38,
+            K: 39,
+            L: 40,
+            M: 41,
+            N: 42,
+            O: 43,
+            P: 44,
+            Q: 45,
+            R: 46,
+            S: 47,
+            T: 48,
+            U: 49,
+            V: 50,
+            W: 51,
+            X: 52,
+            Y: 53,
+            Z: 54,
+            $: 55,
+            _: 56,
+            ee: 57,
+            te: 58,
+            ne: 59,
+            ae: 60,
+            ie: 61,
+        };
+    }
+}

test/compress/issue-1787.js

@@ -0,0 +1,17 @@
+unary_prefix: {
+    options = {
+        evaluate: true,
+        inline: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        console.log(function() {
+            var x = -(2 / 3);
+            return x;
+        }());
+    }
+    expect_exact: "console.log(-2/3);"
+    expect_stdout: true
+}

test/compress/issue-1833.js

@@ -0,0 +1,138 @@
+iife_for: {
+    options = {
+        negate_iife: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function f() {
+            function g() {
+                L: for (;;) break L;
+            }
+            g();
+        }
+        f();
+    }
+    expect: {
+        !function() {
+            !function() {
+                L: for (;;) break L;
+            }();
+        }();
+    }
+}
+
+iife_for_in: {
+    options = {
+        negate_iife: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function f() {
+            function g() {
+                L: for (var a in x) break L;
+            }
+            g();
+        }
+        f();
+    }
+    expect: {
+        !function() {
+            !function() {
+                L: for (var a in x) break L;
+            }();
+        }();
+    }
+}
+
+iife_do: {
+    options = {
+        negate_iife: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function f() {
+            function g() {
+                L: do {
+                    break L;
+                } while (1);
+            }
+            g();
+        }
+        f();
+    }
+    expect: {
+        !function() {
+            !function() {
+                L: do {
+                    break L;
+                } while (1);
+            }();
+        }();
+    }
+}
+
+iife_while: {
+    options = {
+        negate_iife: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function f() {
+            function g() {
+                L: while (1) break L;
+            }
+            g();
+        }
+        f();
+    }
+    expect: {
+        !function() {
+            !function() {
+                L: while (1) break L;
+            }();
+        }();
+    }
+}
+
+label_do: {
+    options = {
+        evaluate: true,
+        loops: true,
+    }
+    input: {
+        L: do {
+            continue L;
+        } while (0);
+    }
+    expect: {
+        L: do {
+            continue L;
+        } while (0);
+    }
+}
+
+label_while: {
+    options = {
+        evaluate: true,
+        dead_code: true,
+        loops: true,
+    }
+    input: {
+        function f() {
+            L: while (0) continue L;
+        }
+    }
+    expect_exact: "function f(){L:;}"
+}

test/compress/issue-1943.js

@@ -0,0 +1,31 @@
+operator: {
+    input: {
+        a. //comment
+        typeof
+    }
+    expect_exact: "a.typeof;"
+}
+
+name: {
+    input: {
+        a. //comment
+        b
+    }
+    expect_exact: "a.b;"
+}
+
+keyword: {
+    input: {
+        a. //comment
+        default
+    }
+    expect_exact: "a.default;"
+}
+
+atom: {
+    input: {
+        a. //comment
+        true
+    }
+    expect_exact: "a.true;"
+}

test/compress/issue-208.js

@@ -38,7 +38,7 @@ mixed: {
         }
     }
     input: {
-        const ENV = 3;
+        var ENV = 3;
         var FOO = 4;
         f(ENV * 10);
         --FOO;
@@ -49,7 +49,7 @@ mixed: {
         x = DEBUG;
     }
     expect: {
-        const ENV = 3;
+        var ENV = 3;
         var FOO = 4;
         f(10);
         --FOO;
@@ -60,7 +60,7 @@ mixed: {
         x = 0;
     }
     expect_warnings: [
-        'WARN: global_defs ENV redefined [test/compress/issue-208.js:41,14]',
+        'WARN: global_defs ENV redefined [test/compress/issue-208.js:41,12]',
         'WARN: global_defs FOO redefined [test/compress/issue-208.js:42,12]',
         'WARN: global_defs FOO redefined [test/compress/issue-208.js:44,10]',
         'WARN: global_defs DEBUG redefined [test/compress/issue-208.js:45,8]',

test/compress/issue-281.js

@@ -0,0 +1,498 @@
+collapse_vars_constants: {
+    options = {
+        collapse_vars: true,
+        evaluate: true,
+        inline: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        function f1(x) {
+            var a = 4, b = x.prop, c = 5, d = sideeffect1(), e = sideeffect2();
+            return b + (function() { return d - a * e - c; })();
+        }
+        function f2(x) {
+            var a = 4, b = x.prop, c = 5, not_used = sideeffect1(), e = sideeffect2();
+            return b + (function() { return -a * e - c; })();
+        }
+    }
+    expect: {
+        function f1(x) {
+            var b = x.prop, d = sideeffect1(), e = sideeffect2();
+            return b + (d - 4 * e - 5);
+        }
+        function f2(x) {
+            var b = x.prop;
+            sideeffect1();
+            return b + (-4 * sideeffect2() - 5);
+        }
+    }
+}
+
+modified: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        unused: true,
+    }
+    input: {
+        function f5(b) {
+            var a = function() {
+                return b;
+            }();
+            return b++ + a;
+        }
+        console.log(f5(1));
+    }
+    expect: {
+        function f5(b) {
+            var a = b;
+            return b++ + a;
+        }
+        console.log(f5(1));
+    }
+    expect_stdout: "2"
+}
+
+ref_scope: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        unused: true,
+    }
+    input: {
+        console.log(function() {
+            var a = 1, b = 2, c = 3;
+            var a = c++, b = b /= a;
+            return function() {
+                return a;
+            }() + b;
+        }());
+    }
+    expect: {
+        console.log(function() {
+            var a = 1, b = 2, c = 3;
+            b = b /= a = c++;
+            return a + b;
+        }());
+    }
+    expect_stdout: true
+}
+
+safe_undefined: {
+    options = {
+        conditionals: true,
+        if_return: true,
+        inline: true,
+        unsafe: false,
+        unused: true,
+    }
+    mangle = {}
+    input: {
+        var a, c;
+        console.log(function(undefined) {
+            return function() {
+                if (a)
+                    return b;
+                if (c)
+                    return d;
+            };
+        }(1)());
+    }
+    expect: {
+        var a, c;
+        console.log(a ? b : c ? d : void 0);
+    }
+    expect_stdout: true
+}
+
+negate_iife_3: {
+    options = {
+        conditionals: true,
+        expression: true,
+        inline: true,
+        negate_iife: true,
+    }
+    input: {
+        (function(){ return t })() ? console.log(true) : console.log(false);
+    }
+    expect: {
+        t ? console.log(true) : console.log(false);
+    }
+}
+
+negate_iife_3_off: {
+    options = {
+        conditionals: true,
+        expression: true,
+        inline: true,
+        negate_iife: false,
+    }
+    input: {
+        (function(){ return t })() ? console.log(true) : console.log(false);
+    }
+    expect: {
+        t ? console.log(true) : console.log(false);
+    }
+}
+
+negate_iife_4: {
+    options = {
+        conditionals: true,
+        expression: true,
+        inline: true,
+        negate_iife: true,
+        sequences: true,
+    }
+    input: {
+        (function(){ return t })() ? console.log(true) : console.log(false);
+        (function(){
+            console.log("something");
+        })();
+    }
+    expect: {
+        t ? console.log(true) : console.log(false), void console.log("something");
+    }
+}
+
+negate_iife_5: {
+    options = {
+        conditionals: true,
+        expression: true,
+        inline: true,
+        negate_iife: true,
+        sequences: true,
+    }
+    input: {
+        if ((function(){ return t })()) {
+            foo(true);
+        } else {
+            bar(false);
+        }
+        (function(){
+            console.log("something");
+        })();
+    }
+    expect: {
+        t ? foo(true) : bar(false), void console.log("something");
+    }
+}
+
+negate_iife_5_off: {
+    options = {
+        conditionals: true,
+        expression: true,
+        inline: true,
+        negate_iife: false,
+        sequences: true,
+    };
+    input: {
+        if ((function(){ return t })()) {
+            foo(true);
+        } else {
+            bar(false);
+        }
+        (function(){
+            console.log("something");
+        })();
+    }
+    expect: {
+        t ? foo(true) : bar(false), void console.log("something");
+    }
+}
+
+issue_1254_negate_iife_true: {
+    options = {
+        expression: true,
+        inline: true,
+        negate_iife: true,
+    }
+    input: {
+        (function() {
+            return function() {
+                console.log('test')
+            };
+        })()();
+    }
+    expect_exact: 'void console.log("test");'
+    expect_stdout: true
+}
+
+issue_1254_negate_iife_nested: {
+    options = {
+        expression: true,
+        inline: true,
+        negate_iife: true,
+    }
+    input: {
+        (function() {
+            return function() {
+                console.log('test')
+            };
+        })()()()()();
+    }
+    expect_exact: '(void console.log("test"))()()();'
+}
+
+negate_iife_issue_1073: {
+    options = {
+        conditionals: true,
+        evaluate: true,
+        inline: true,
+        negate_iife: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        sequences: true,
+        unused: true,
+    };
+    input: {
+        new (function(a) {
+            return function Foo() {
+                this.x = a;
+                console.log(this);
+            };
+        }(7))();
+    }
+    expect: {
+        new function() {
+            this.x = 7,
+            console.log(this);
+        }();
+    }
+    expect_stdout: true
+}
+
+issue_1288_side_effects: {
+    options = {
+        conditionals: true,
+        evaluate: true,
+        inline: true,
+        negate_iife: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        unused: true,
+    };
+    input: {
+        if (w) ;
+        else {
+            (function f() {})();
+        }
+        if (!x) {
+            (function() {
+                x = {};
+            })();
+        }
+        if (y)
+            (function() {})();
+        else
+            (function(z) {
+                return z;
+            })(0);
+    }
+    expect: {
+        w;
+        x || (x = {});
+        y;
+    }
+}
+
+inner_var_for_in_1: {
+    options = {
+        evaluate: true,
+        inline: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+    }
+    input: {
+        function f() {
+            var a = 1, b = 2;
+            for (b in (function() {
+                return x(a, b, c);
+            })()) {
+                var c = 3, d = 4;
+                x(a, b, c, d);
+            }
+            x(a, b, c, d);
+        }
+    }
+    expect: {
+        function f() {
+            var a = 1, b = 2;
+            for (b in x(1, b, c)) {
+                var c = 3, d = 4;
+                x(1, b, c, d);
+            }
+            x(1, b, c, d);
+        }
+    }
+}
+
+issue_1595_3: {
+    options = {
+        evaluate: true,
+        inline: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function f(a) {
+            return g(a + 1);
+        })(2);
+    }
+    expect: {
+        g(3);
+    }
+}
+
+issue_1758: {
+    options = {
+        inline: true,
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(function(c) {
+            var undefined = 42;
+            return function() {
+                c--;
+                c--, c.toString();
+                return;
+            }();
+        }());
+    }
+    expect: {
+        console.log(function(c) {
+            var undefined = 42;
+            return c--, c--, void c.toString();
+        }());
+    }
+    expect_stdout: "undefined"
+}
+wrap_iife: {
+    options = {
+        inline: true,
+        negate_iife: false,
+    }
+    beautify = {
+        wrap_iife: true,
+    }
+    input: {
+        (function() {
+            return function() {
+                console.log('test')
+            };
+        })()();
+    }
+    expect_exact: 'void console.log("test");'
+}
+
+wrap_iife_in_expression: {
+    options = {
+        inline: true,
+        negate_iife: false,
+    }
+    beautify = {
+        wrap_iife: true,
+    }
+    input: {
+        foo = (function () {
+            return bar();
+        })();
+    }
+    expect_exact: 'foo=bar();'
+}
+
+wrap_iife_in_return_call: {
+    options = {
+        inline: true,
+        negate_iife: false,
+    }
+    beautify = {
+        wrap_iife: true,
+    }
+    input: {
+        (function() {
+            return (function() {
+                console.log('test')
+            })();
+        })()();
+    }
+    expect_exact: '(void console.log("test"))();'
+}
+
+pure_annotation_1: {
+    options = {
+        inline: true,
+        side_effects: true,
+    }
+    input: {
+        /*@__PURE__*/(function() {
+            console.log("hello");
+        }());
+    }
+    expect_exact: ""
+}
+
+pure_annotation_2: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        side_effects: true,
+    }
+    input: {
+        /*@__PURE__*/(function(n) {
+            console.log("hello", n);
+        }(42));
+    }
+    expect_exact: ""
+}
+
+drop_fargs: {
+    options = {
+        cascade: true,
+        inline: true,
+        keep_fargs: false,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var a = 1;
+        !function(a_1) {
+            a++;
+        }(a++ + (a && a.var));
+        console.log(a);
+    }
+    expect: {
+        var a = 1;
+        ++a && a.var, a++;
+        console.log(a);
+    }
+    expect_stdout: "3"
+}
+
+keep_fargs: {
+    options = {
+        cascade: true,
+        inline: true,
+        keep_fargs: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var a = 1;
+        !function(a_1) {
+            a++;
+        }(a++ + (a && a.var));
+        console.log(a);
+    }
+    expect: {
+        var a = 1;
+        ++a && a.var, a++;
+        console.log(a);
+    }
+    expect_stdout: "3"
+}

test/compress/issue-597.js

@@ -6,7 +6,7 @@ NaN_and_Infinity_must_have_parens: {
     }
     expect: {
         (1/0).toString();
-        NaN.toString();         // transformation to 0/0 dropped
+        NaN.toString();
     }
 }
 
@@ -23,3 +23,135 @@ NaN_and_Infinity_should_not_be_replaced_when_they_are_redefined: {
         NaN.toString();
     }
 }
+
+NaN_and_Infinity_must_have_parens_evaluate: {
+    options = {
+        evaluate: true,
+    }
+    input: {
+        (123456789 / 0).toString();
+        (+"foo").toString();
+    }
+    expect: {
+        (1/0).toString();
+        NaN.toString();
+    }
+}
+
+NaN_and_Infinity_should_not_be_replaced_when_they_are_redefined_evaluate: {
+    options = {
+        evaluate: true,
+    }
+    input: {
+        var Infinity, NaN;
+        (123456789 / 0).toString();
+        (+"foo").toString();
+    }
+    expect: {
+        var Infinity, NaN;
+        (1/0).toString();
+        (0/0).toString();
+    }
+}
+
+beautify_off_1: {
+    options = {
+        evaluate: true,
+    }
+    beautify = {
+        beautify: false,
+    }
+    input: {
+        var NaN;
+        console.log(
+            null,
+            undefined,
+            Infinity,
+            NaN,
+            Infinity * undefined,
+            Infinity.toString(),
+            NaN.toString(),
+            (Infinity * undefined).toString()
+        );
+    }
+    expect_exact: "var NaN;console.log(null,void 0,1/0,NaN,0/0,(1/0).toString(),NaN.toString(),(0/0).toString());"
+    expect_stdout: true
+}
+
+beautify_off_2: {
+    options = {
+        evaluate: true,
+    }
+    beautify = {
+        beautify: false,
+    }
+    input: {
+        console.log(
+            null.toString(),
+            undefined.toString()
+        );
+    }
+    expect_exact: "console.log(null.toString(),(void 0).toString());"
+}
+
+beautify_on_1: {
+    options = {
+        evaluate: true,
+    }
+    beautify = {
+        beautify: true,
+    }
+    input: {
+        var NaN;
+        console.log(
+            null,
+            undefined,
+            Infinity,
+            NaN,
+            Infinity * undefined,
+            Infinity.toString(),
+            NaN.toString(),
+            (Infinity * undefined).toString()
+        );
+    }
+    expect_exact: [
+        "var NaN;",
+        "",
+        "console.log(null, void 0, 1 / 0, NaN, 0 / 0, (1 / 0).toString(), NaN.toString(), (0 / 0).toString());",
+    ]
+    expect_stdout: true
+}
+
+beautify_on_2: {
+    options = {
+        evaluate: true,
+    }
+    beautify = {
+        beautify: true,
+    }
+    input: {
+        console.log(
+            null.toString(),
+            undefined.toString()
+        );
+    }
+    expect_exact: "console.log(null.toString(), (void 0).toString());"
+}
+
+issue_1724: {
+    input: {
+        var a = 0;
+        ++a % Infinity | Infinity ? a++ : 0;
+        console.log(a);
+    }
+    expect_exact: "var a=0;++a%(1/0)|1/0?a++:0;console.log(a);"
+    expect_stdout: "2"
+}
+
+issue_1725: {
+    input: {
+        ([].length === 0) % Infinity ? console.log("PASS") : console.log("FAIL");
+    }
+    expect_exact: '(0===[].length)%(1/0)?console.log("PASS"):console.log("FAIL");'
+    expect_stdout: "PASS"
+}

test/compress/issue-640.js

@@ -159,7 +159,7 @@ negate_iife_4: {
         })();
     }
     expect: {
-        (function(){ return t })() ? console.log(true) : console.log(false), function(){
+        !function(){ return t }() ? console.log(false) : console.log(true), function(){
             console.log("something");
         }();
     }
@@ -183,7 +183,7 @@ negate_iife_5: {
         })();
     }
     expect: {
-        (function(){ return t })() ? foo(true) : bar(false), function(){
+        !function(){ return t }() ? bar(false) : foo(true), function(){
             console.log("something");
         }();
     }
@@ -207,7 +207,7 @@ negate_iife_5_off: {
         })();
     }
     expect: {
-        (function(){ return t })() ? foo(true) : bar(false), function(){
+        !function(){ return t }() ? bar(false) : foo(true), function(){
             console.log("something");
         }();
     }

test/compress/issue-747.js

@@ -1,37 +1,45 @@
 dont_reuse_prop: {
-    mangle_props = {
+    mangle = {
-        regex: /asd/
+        properties: {
-    };
+            regex: /asd/,
-
+        },
+    }
     input: {
+        "aaaaaaaaaabbbbb";
         var obj = {};
         obj.a = 123;
         obj.asd = 256;
         console.log(obj.a);
     }
     expect: {
+        "aaaaaaaaaabbbbb";
         var obj = {};
         obj.a = 123;
         obj.b = 256;
         console.log(obj.a);
     }
+    expect_stdout: "123"
 }
 
 unmangleable_props_should_always_be_reserved: {
-    mangle_props = {
+    mangle = {
-        regex: /asd/
+        properties: {
-    };
+            regex: /asd/,
-
+        },
+    }
     input: {
+        "aaaaaaaaaabbbbb";
         var obj = {};
         obj.asd = 256;
         obj.a = 123;
         console.log(obj.a);
     }
     expect: {
+        "aaaaaaaaaabbbbb";
         var obj = {};
         obj.b = 256;
         obj.a = 123;
         console.log(obj.a);
     }
-}
+    expect_stdout: "123"
+}

test/compress/issue-973.js

@@ -51,6 +51,7 @@ this_binding_collapse_vars: {
     options = {
         collapse_vars: true,
         toplevel: true,
+        unused: true,
     };
     input: {
         var c = a; c();

test/compress/loops.js

@@ -146,50 +146,6 @@ parse_do_while_without_semicolon: {
     }
 }
 
-
-keep_collapse_const_in_own_block_scope: {
-    options = {
-        join_vars: true,
-        loops: true
-    }
-    input: {
-        var i=2;
-        const c=5;
-        while(i--)
-            console.log(i);
-        console.log(c);
-    }
-    expect: {
-        var i=2;
-        const c=5;
-        for(;i--;)
-            console.log(i);
-        console.log(c);
-    }
-    expect_stdout: true
-}
-
-keep_collapse_const_in_own_block_scope_2: {
-    options = {
-        join_vars: true,
-        loops: true
-    }
-    input: {
-        const c=5;
-        var i=2; // Moves to loop, while it did not in previous test
-        while(i--)
-            console.log(i);
-        console.log(c);
-    }
-    expect: {
-        const c=5;
-        for(var i=2;i--;)
-            console.log(i);
-        console.log(c);
-    }
-    expect_stdout: true
-}
-
 evaluate: {
     options = {
         loops: true,
@@ -215,8 +171,7 @@ evaluate: {
             a();
         for(;;)
             c();
-        // rule disabled due to issue_1532
+        d();
-        do d(); while (false);
     }
 }
 
@@ -246,7 +201,7 @@ issue_1532: {
 issue_186: {
     beautify = {
         beautify: false,
-        screw_ie8: true,
+        ie8: false,
     }
     input: {
         var x = 3;
@@ -265,7 +220,7 @@ issue_186: {
 issue_186_ie8: {
     beautify = {
         beautify: false,
-        screw_ie8: false,
+        ie8: true,
     }
     input: {
         var x = 3;
@@ -284,7 +239,7 @@ issue_186_ie8: {
 issue_186_beautify: {
     beautify = {
         beautify: true,
-        screw_ie8: true,
+        ie8: false,
     }
     input: {
         var x = 3;
@@ -311,7 +266,7 @@ issue_186_beautify: {
 issue_186_beautify_ie8: {
     beautify = {
         beautify: true,
-        screw_ie8: false,
+        ie8: true,
     }
     input: {
         var x = 3;
@@ -341,7 +296,7 @@ issue_186_bracketize: {
     beautify = {
         beautify: false,
         bracketize: true,
-        screw_ie8: true,
+        ie8: false,
     }
     input: {
         var x = 3;
@@ -361,7 +316,7 @@ issue_186_bracketize_ie8: {
     beautify = {
         beautify: false,
         bracketize: true,
-        screw_ie8: false,
+        ie8: true,
     }
     input: {
         var x = 3;
@@ -381,7 +336,7 @@ issue_186_beautify_bracketize: {
     beautify = {
         beautify: true,
         bracketize: true,
-        screw_ie8: true,
+        ie8: false,
     }
     input: {
         var x = 3;
@@ -413,7 +368,7 @@ issue_186_beautify_bracketize_ie8: {
     beautify = {
         beautify: true,
         bracketize: true,
-        screw_ie8: false,
+        ie8: true,
     }
     input: {
         var x = 3;
@@ -458,3 +413,40 @@ issue_1648: {
     }
     expect_exact: "function f(){for(x();1;);}"
 }
+
+do_switch: {
+    options = {
+        evaluate: true,
+        loops: true,
+    }
+    input: {
+        do {
+            switch (a) {
+              case b:
+                continue;
+            }
+        } while (false);
+    }
+    expect: {
+        do {
+            switch (a) {
+              case b:
+                continue;
+            }
+        } while (false);
+    }
+}
+
+in_parenthesis_1: {
+    input: {
+        for (("foo" in {});0;);
+    }
+    expect_exact: 'for(("foo"in{});0;);'
+}
+
+in_parenthesis_2: {
+    input: {
+        for ((function(){ "foo" in {}; });0;);
+    }
+    expect_exact: 'for(function(){"foo"in{}};0;);'
+}

test/compress/negate-iife.js

@@ -22,27 +22,25 @@ negate_iife_1_off: {
 
 negate_iife_2: {
     options = {
-        negate_iife: true
+        inline: true,
+        negate_iife: true,
     };
     input: {
-        (function(){ return {} })().x = 10; // should not transform this one
-    }
-    expect: {
         (function(){ return {} })().x = 10;
     }
+    expect_exact: "({}).x=10;"
 }
 
 negate_iife_2_side_effects: {
     options = {
+        inline: true,
         negate_iife: true,
         side_effects: true,
     }
     input: {
-        (function(){ return {} })().x = 10; // should not transform this one
-    }
-    expect: {
         (function(){ return {} })().x = 10;
     }
+    expect_exact: "({}).x=10;"
 }
 
 negate_iife_3: {
@@ -62,6 +60,7 @@ negate_iife_3_evaluate: {
     options = {
         conditionals: true,
         evaluate: true,
+        inline: true,
         negate_iife: true,
     }
     input: {
@@ -104,6 +103,7 @@ negate_iife_3_off_evaluate: {
     options = {
         conditionals: true,
         evaluate: true,
+        inline: true,
         negate_iife: false,
     }
     input: {

test/compress/new.js

@@ -82,3 +82,19 @@ new_with_unary_prefix: {
     }
     expect_exact: 'var bar=(+new Date).toString(32);';
 }
+
+dot_parenthesis_1: {
+    input: {
+        console.log(new (Math.random().constructor) instanceof Number);
+    }
+    expect_exact: "console.log(new(Math.random().constructor)instanceof Number);"
+    expect_stdout: "true"
+}
+
+dot_parenthesis_2: {
+    input: {
+        console.log(typeof new function(){Math.random()}.constructor);
+    }
+    expect_exact: "console.log(typeof new function(){Math.random()}.constructor);"
+    expect_stdout: "function"
+}

test/compress/node_version.js

@@ -0,0 +1,38 @@
+eval_let_6: {
+    input: {
+        eval("let a;");
+        console.log();
+    }
+    expect: {
+        eval("let a;");
+        console.log();
+    }
+    expect_stdout: ""
+    node_version: ">=6"
+}
+
+eval_let_4: {
+    input: {
+        eval("let a;");
+        console.log();
+    }
+    expect: {
+        eval("let a;");
+        console.log();
+    }
+    expect_stdout: SyntaxError("Block-scoped declarations (let, const, function, class) not yet supported outside strict mode")
+    node_version: "4"
+}
+
+eval_let_0: {
+    input: {
+        eval("let a;");
+        console.log();
+    }
+    expect: {
+        eval("let a;");
+        console.log();
+    }
+    expect_stdout: SyntaxError("Unexpected identifier")
+    node_version: "<=0.12"
+}

test/compress/numbers.js

@@ -168,3 +168,37 @@ issue_1710: {
     }
     expect_stdout: true
 }
+
+unary_binary_parenthesis: {
+    input: {
+        var v = [ 0, 1, NaN, Infinity, null, undefined, true, false, "", "foo", /foo/ ];
+        v.forEach(function(x) {
+            v.forEach(function(y) {
+                console.log(
+                    +(x*y),
+                    +(x/y),
+                    +(x%y),
+                    -(x*y),
+                    -(x/y),
+                    -(x%y)
+                );
+            });
+        });
+    }
+    expect: {
+        var v = [ 0, 1, NaN, 1/0, null, void 0, true, false, "", "foo", /foo/ ];
+        v.forEach(function(x) {
+            v.forEach(function(y) {
+                console.log(
+                    +x*y,
+                    +x/y,
+                    +x%y,
+                    -x*y,
+                    -x/y,
+                    -x%y
+                );
+            });
+        });
+    }
+    expect_stdout: true
+}

test/compress/properties.js

@@ -1,7 +1,8 @@
 keep_properties: {
     options = {
-        properties: false
+        evaluate: true,
-    };
+        properties: false,
+    }
     input: {
         a["foo"] = "bar";
     }
@@ -12,9 +13,12 @@ keep_properties: {
 
 dot_properties: {
     options = {
+        evaluate: true,
         properties: true,
-        screw_ie8: false
+    }
-    };
+    beautify = {
+        ie8: true,
+    }
     input: {
         a["foo"] = "bar";
         a["if"] = "if";
@@ -35,9 +39,12 @@ dot_properties: {
 
 dot_properties_es5: {
     options = {
+        evaluate: true,
         properties: true,
-        screw_ie8: true
+    }
-    };
+    beautify = {
+        ie8: false,
+    }
     input: {
         a["foo"] = "bar";
         a["if"] = "if";
@@ -57,8 +64,8 @@ dot_properties_es5: {
 sub_properties: {
     options = {
         evaluate: true,
-        properties: true
+        properties: true,
-    };
+    }
     input: {
         a[0] = 0;
         a["0"] = 1;
@@ -77,18 +84,18 @@ sub_properties: {
         a[3.14] = 3;
         a.if = 4;
         a["foo bar"] = 5;
-        a[NaN] = 6;
+        a.NaN = 6;
-        a[null] = 7;
+        a.null = 7;
         a[void 0] = 8;
     }
 }
 
 evaluate_array_length: {
     options = {
+        evaluate: true,
         properties: true,
         unsafe: true,
-        evaluate: true
+    }
-    };
     input: {
         a = [1, 2, 3].length;
         a = [1, 2, 3].join()["len" + "gth"];
@@ -105,10 +112,10 @@ evaluate_array_length: {
 
 evaluate_string_length: {
     options = {
+        evaluate: true,
         properties: true,
         unsafe: true,
-        evaluate: true
+    }
-    };
     input: {
         a = "foo".length;
         a = ("foo" + "bar")["len" + "gth"];
@@ -124,9 +131,11 @@ evaluate_string_length: {
 }
 
 mangle_properties: {
-    mangle_props = {
+    mangle = {
-        ignore_quoted: false
+        properties: {
-    };
+            keep_quoted: false,
+        },
+    }
     input: {
         a["foo"] = "bar";
         a.color = "red";
@@ -137,18 +146,21 @@ mangle_properties: {
     expect: {
         a["a"] = "bar";
         a.b = "red";
-        x = {c: 10};
+        x = {o: 10};
-        a.d(x.c, a.a);
+        a.r(x.o, a.a);
-        a['d']({b: "blue", a: "baz"});
+        a['r']({b: "blue", a: "baz"});
     }
 }
 
 mangle_unquoted_properties: {
     options = {
-        properties: false
+        evaluate: true,
+        properties: false,
     }
-    mangle_props = {
+    mangle = {
-        ignore_quoted: true
+        properties: {
+            keep_quoted: true,
+        },
     }
     beautify = {
         beautify: false,
@@ -177,24 +189,26 @@ mangle_unquoted_properties: {
         function f1() {
             a["foo"] = "bar";
             a.color = "red";
-            a.b = 2;
+            a.r = 2;
-            x = {"bar": 10, c: 7};
+            x = {"bar": 10, b: 7};
-            a.c = 9;
+            a.b = 9;
         }
         function f2() {
             a.foo = "bar";
             a['color'] = "red";
-            x = {bar: 10, c: 7};
+            x = {bar: 10, b: 7};
-            a.c = 9;
+            a.b = 9;
-            a.b = 3;
+            a.r = 3;
         }
     }
 }
 
 mangle_debug: {
-    mangle_props = {
+    mangle = {
-        debug: ""
+        properties: {
-    };
+            debug: "",
+        },
+    }
     input: {
         a.foo = "bar";
         x = { baz: "ban" };
@@ -206,9 +220,11 @@ mangle_debug: {
 }
 
 mangle_debug_true: {
-    mangle_props = {
+    mangle = {
-        debug: true
+        properties: {
-    };
+            debug: true,
+        },
+    }
     input: {
         a.foo = "bar";
         x = { baz: "ban" };
@@ -220,9 +236,11 @@ mangle_debug_true: {
 }
 
 mangle_debug_suffix: {
-    mangle_props = {
+    mangle = {
-        debug: "XYZ"
+        properties: {
-    };
+            debug: "XYZ",
+        },
+    }
     input: {
         a.foo = "bar";
         x = { baz: "ban" };
@@ -233,14 +251,17 @@ mangle_debug_suffix: {
     }
 }
 
-mangle_debug_suffix_ignore_quoted: {
+mangle_debug_suffix_keep_quoted: {
     options = {
-        properties: false
+        evaluate: true,
+        properties: false,
     }
-    mangle_props = {
+    mangle = {
-        ignore_quoted: true,
+        properties: {
-        debug: "XYZ",
+            debug: "XYZ",
-        reserved: []
+            keep_quoted: true,
+            reserved: [],
+        },
     }
     beautify = {
         beautify: false,
@@ -555,3 +576,455 @@ native_prototype: {
         "".indexOf.call(e, "bar");
     }
 }
+
+accessor_boolean: {
+    input: {
+        var a = 1;
+        var b = {
+            get true() {
+                return a;
+            },
+            set false(c) {
+                a = c;
+            }
+        };
+        console.log(b.true, b.false = 2, b.true);
+    }
+    expect_exact: 'var a=1;var b={get true(){return a},set false(c){a=c}};console.log(b.true,b.false=2,b.true);'
+    expect_stdout: "1 2 2"
+}
+
+accessor_get_set: {
+    input: {
+        var a = 1;
+        var b = {
+            get set() {
+                return a;
+            },
+            set get(c) {
+                a = c;
+            }
+        };
+        console.log(b.set, b.get = 2, b.set);
+    }
+    expect_exact: 'var a=1;var b={get set(){return a},set get(c){a=c}};console.log(b.set,b.get=2,b.set);'
+    expect_stdout: "1 2 2"
+}
+
+accessor_null_undefined: {
+    input: {
+        var a = 1;
+        var b = {
+            get null() {
+                return a;
+            },
+            set undefined(c) {
+                a = c;
+            }
+        };
+        console.log(b.null, b.undefined = 2, b.null);
+    }
+    expect_exact: 'var a=1;var b={get null(){return a},set undefined(c){a=c}};console.log(b.null,b.undefined=2,b.null);'
+    expect_stdout: "1 2 2"
+}
+
+accessor_number: {
+    input: {
+        var a = 1;
+        var b = {
+            get 42() {
+                return a;
+            },
+            set 42(c) {
+                a = c;
+            }
+        };
+        console.log(b[42], b[42] = 2, b[42]);
+    }
+    expect_exact: 'var a=1;var b={get 42(){return a},set 42(c){a=c}};console.log(b[42],b[42]=2,b[42]);'
+    expect_stdout: "1 2 2"
+}
+
+accessor_string: {
+    input: {
+        var a = 1;
+        var b = {
+            get "a-b"() {
+                return a;
+            },
+            set "a-b"(c) {
+                a = c;
+            }
+        };
+        console.log(b["a-b"], b["a-b"] = 2, b["a-b"]);
+    }
+    expect_exact: 'var a=1;var b={get"a-b"(){return a},set"a-b"(c){a=c}};console.log(b["a-b"],b["a-b"]=2,b["a-b"]);'
+    expect_stdout: "1 2 2"
+}
+
+accessor_this: {
+    input: {
+        var a = 1;
+        var b = {
+            get this() {
+                return a;
+            },
+            set this(c) {
+                a = c;
+            }
+        };
+        console.log(b.this, b.this = 2, b.this);
+    }
+    expect_exact: 'var a=1;var b={get this(){return a},set this(c){a=c}};console.log(b.this,b.this=2,b.this);'
+    expect_stdout: "1 2 2"
+}
+
+issue_2208_1: {
+    options = {
+        inline: true,
+        properties: true,
+        side_effects: true,
+    }
+    input: {
+        console.log({
+            p: function() {
+                return 42;
+            }
+        }.p());
+    }
+    expect: {
+        console.log(42);
+    }
+    expect_stdout: "42"
+}
+
+issue_2208_2: {
+    options = {
+        inline: true,
+        properties: true,
+        side_effects: true,
+    }
+    input: {
+        console.log({
+            a: 42,
+            p: function() {
+                return this.a;
+            }
+        }.p());
+    }
+    expect: {
+        console.log({
+            a: 42,
+            p: function() {
+                return this.a;
+            }
+        }.p());
+    }
+    expect_stdout: "42"
+}
+
+issue_2208_3: {
+    options = {
+        inline: true,
+        properties: true,
+        side_effects: true,
+    }
+    input: {
+        a = 42;
+        console.log({
+            p: function() {
+                return function() {
+                    return this.a;
+                }();
+            }
+        }.p());
+    }
+    expect: {
+        a = 42;
+        console.log(function() {
+            return this.a;
+        }());
+    }
+    expect_stdout: "42"
+}
+
+issue_2208_4: {
+    options = {
+        inline: true,
+        properties: true,
+        side_effects: true,
+    }
+    input: {
+        function foo() {}
+        console.log({
+            a: foo(),
+            p: function() {
+                return 42;
+            }
+        }.p());
+    }
+    expect: {
+        function foo() {}
+        console.log((foo(), function() {
+            return 42;
+        })());
+    }
+    expect_stdout: "42"
+}
+
+issue_2208_5: {
+    options = {
+        inline: true,
+        properties: true,
+        side_effects: true,
+    }
+    input: {
+        console.log({
+            p: "FAIL",
+            p: function() {
+                return 42;
+            }
+        }.p());
+    }
+    expect: {
+        console.log(42);
+    }
+    expect_stdout: "42"
+}
+
+issue_2256: {
+    options = {
+        side_effects: true,
+    }
+    mangle = {
+        properties: {
+            keep_quoted: true,
+        },
+    }
+    input: {
+        ({ "keep": 1 });
+        g.keep = g.change;
+    }
+    expect: {
+        g.keep = g.g;
+    }
+}
+
+lhs_prop_1: {
+    options = {
+        evaluate: true,
+        properties: true,
+    }
+    input: {
+        console.log(++{
+            a: 1
+        }.a);
+    }
+    expect: {
+        console.log(++{
+            a: 1
+        }.a);
+    }
+    expect_stdout: "2"
+}
+
+lhs_prop_2: {
+    options = {
+        evaluate: true,
+        inline: true,
+        properties: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        [1][0] = 42;
+        (function(a) {
+            a.b = "g";
+        })("abc");
+        (function(a) {
+            a[2] = "g";
+        })("def");
+        (function(a) {
+            a[""] = "g";
+        })("ghi");
+    }
+    expect: {
+        [1][0] = 42;
+        "abc".b = "g";
+        "def"[2] = "g";
+        "ghi"[""] = "g";
+    }
+}
+
+literal_duplicate_key_side_effects: {
+    options = {
+        properties: true,
+        side_effects: true,
+    }
+    input: {
+        console.log({
+            a: "FAIL",
+            a: console.log ? "PASS" : "FAIL"
+        }.a);
+    }
+    expect: {
+        console.log(console.log ? "PASS" : "FAIL");
+    }
+    expect_stdout: "PASS"
+}
+
+prop_side_effects_1: {
+    options = {
+        evaluate: true,
+        inline: true,
+        properties: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var C = 1;
+        console.log(C);
+        var obj = {
+            bar: function() {
+                return C + C;
+            }
+        };
+        console.log(obj.bar());
+    }
+    expect: {
+        console.log(1);
+        var obj = {
+            bar: function() {
+                return 2;
+            }
+        };
+        console.log(obj.bar());
+    }
+    expect_stdout: [
+        "1",
+        "2",
+    ]
+}
+
+prop_side_effects_2: {
+    options = {
+        evaluate: true,
+        inline: true,
+        passes: 2,
+        properties: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var C = 1;
+        console.log(C);
+        var obj = {
+            "": function() {
+                return C + C;
+            }
+        };
+        console.log(obj[""]());
+    }
+    expect: {
+        console.log(1);
+        console.log(2);
+    }
+    expect_stdout: [
+        "1",
+        "2",
+    ]
+}
+
+accessor_1: {
+    options = {
+        properties: true,
+    }
+    input: {
+        console.log({
+            a: "FAIL",
+            get a() {
+                return "PASS";
+            }
+        }.a);
+    }
+    expect: {
+        console.log({
+            a: "FAIL",
+            get a() {
+                return "PASS";
+            }
+        }.a);
+    }
+    expect_stdout: "PASS"
+    node_version: ">=4"
+}
+
+accessor_2: {
+    options = {
+        properties: true,
+    }
+    input: {
+        console.log({
+            get a() {
+                return "PASS";
+            },
+            set a(v) {},
+            a: "FAIL"
+        }.a);
+    }
+    expect: {
+        console.log({
+            get a() {
+                return "PASS";
+            },
+            set a(v) {},
+            a: "FAIL"
+        }.a);
+    }
+    expect_stdout: true
+}
+
+array_hole: {
+    options = {
+        properties: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(
+            [ 1, 2, , 3][1],
+            [ 1, 2, , 3][2],
+            [ 1, 2, , 3][3]
+        );
+    }
+    expect: {
+        console.log(2, void 0, 3);
+    }
+    expect_stdout: "2 undefined 3"
+}
+
+new_this: {
+    options = {
+        properties: true,
+        side_effects: true,
+    }
+    input: {
+        new {
+            f: function(a) {
+                this.a = a;
+            }
+        }.f(42);
+    }
+    expect: {
+        new function(a) {
+            this.a = a;
+        }(42);
+    }
+}

test/compress/pure_getters.js

@@ -0,0 +1,613 @@
+strict: {
+    options = {
+        pure_getters: "strict",
+        reduce_funcs: false,
+        reduce_vars: false,
+        side_effects: true,
+        toplevel: true,
+    }
+    input: {
+        var a, b = null, c = {};
+        a.prop;
+        b.prop;
+        c.prop;
+        d.prop;
+        null.prop;
+        (void 0).prop;
+        undefined.prop;
+    }
+    expect: {
+        var a, b = null, c = {};
+        a.prop;
+        b.prop;
+        c.prop;
+        d.prop;
+        null.prop;
+        (void 0).prop;
+        (void 0).prop;
+    }
+}
+
+strict_reduce_vars: {
+    options = {
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+    }
+    input: {
+        var a, b = null, c = {};
+        a.prop;
+        b.prop;
+        c.prop;
+        d.prop;
+        null.prop;
+        (void 0).prop;
+        undefined.prop;
+    }
+    expect: {
+        var a, b = null, c = {};
+        a.prop;
+        b.prop;
+        d.prop;
+        null.prop;
+        (void 0).prop;
+        (void 0).prop;
+    }
+}
+
+unsafe: {
+    options = {
+        pure_getters: true,
+        reduce_funcs: false,
+        reduce_vars: false,
+        side_effects: true,
+        toplevel: true,
+    }
+    input: {
+        var a, b = null, c = {};
+        a.prop;
+        b.prop;
+        c.prop;
+        d.prop;
+        null.prop;
+        (void 0).prop;
+        undefined.prop;
+    }
+    expect: {
+        var a, b = null, c = {};
+        d;
+        null.prop;
+        (void 0).prop;
+        (void 0).prop;
+    }
+}
+
+unsafe_reduce_vars: {
+    options = {
+        pure_getters: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+    }
+    input: {
+        var a, b = null, c = {};
+        a.prop;
+        b.prop;
+        c.prop;
+        d.prop;
+        null.prop;
+        (void 0).prop;
+        undefined.prop;
+    }
+    expect: {
+        var a, b = null, c = {};
+        d;
+        null.prop;
+        (void 0).prop;
+        (void 0).prop;
+    }
+}
+
+chained: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+    }
+    input: {
+        a.b.c;
+    }
+    expect: {
+        a.b.c;
+    }
+}
+
+impure_getter_1: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+    }
+    input: {
+        ({
+            get a() {
+                console.log(1);
+            },
+            b: 1
+        }).a;
+        ({
+            get a() {
+                console.log(1);
+            },
+            b: 1
+        }).b;
+    }
+    expect: {
+        ({
+            get a() {
+                console.log(1);
+            },
+            b: 1
+        }).a;
+        ({
+            get a() {
+                console.log(1);
+            },
+            b: 1
+        }).b;
+    }
+    expect_stdout: "1"
+}
+
+impure_getter_2: {
+    options = {
+        pure_getters: true,
+        side_effects: true,
+    }
+    input: {
+        // will produce incorrect output because getter is not pure
+        ({
+            get a() {
+                console.log(1);
+            },
+            b: 1
+        }).a;
+        ({
+            get a() {
+                console.log(1);
+            },
+            b: 1
+        }).b;
+    }
+    expect: {}
+}
+
+issue_2110_1: {
+    options = {
+        cascade: true,
+        pure_getters: "strict",
+        sequences: true,
+        side_effects: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        function f() {
+            function f() {}
+            function g() {
+                return this;
+            }
+            f.g = g;
+            return f.g();
+        }
+        console.log(typeof f());
+    }
+    expect: {
+        function f() {
+            function f() {}
+            return f.g = function() {
+                return this;
+            }, f.g();
+        }
+        console.log(typeof f());
+    }
+    expect_stdout: "function"
+}
+
+issue_2110_2: {
+    options = {
+        collapse_vars: true,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        function f() {
+            function f() {}
+            function g() {
+                return this;
+            }
+            f.g = g;
+            return f.g();
+        }
+        console.log(typeof f());
+    }
+    expect: {
+        function f() {
+            function f() {}
+            f.g = function() {
+                return this;
+            };
+            return f.g();
+        }
+        console.log(typeof f());
+    }
+    expect_stdout: "function"
+}
+
+set_immutable_1: {
+    options = {
+        collapse_vars: true,
+        evaluate: true,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a = 1;
+        a.foo += "";
+        if (a.foo) console.log("FAIL");
+        else console.log("PASS");
+    }
+    expect: {
+        1..foo += "";
+        if (1..foo) console.log("FAIL");
+        else console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}
+
+set_immutable_2: {
+    options = {
+        cascade: true,
+        conditionals: true,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        toplevel: true,
+    }
+    input: {
+        var a = 1;
+        a.foo += "";
+        if (a.foo) console.log("FAIL");
+        else console.log("PASS");
+    }
+    expect: {
+        var a = 1;
+        a.foo += "", a.foo ? console.log("FAIL") : console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}
+
+set_immutable_3: {
+    options = {
+        collapse_vars: true,
+        evaluate: true,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        "use strict";
+        var a = 1;
+        a.foo += "";
+        if (a.foo) console.log("FAIL");
+        else console.log("PASS");
+    }
+    expect: {
+        "use strict";
+        1..foo += "";
+        if (1..foo) console.log("FAIL");
+        else console.log("PASS");
+    }
+    expect_stdout: true
+}
+
+set_immutable_4: {
+    options = {
+        cascade: true,
+        conditionals: true,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        toplevel: true,
+    }
+    input: {
+        "use strict";
+        var a = 1;
+        a.foo += "";
+        if (a.foo) console.log("FAIL");
+        else console.log("PASS");
+    }
+    expect: {
+        "use strict";
+        var a = 1;
+        a.foo += "", a.foo ? console.log("FAIL") : console.log("PASS");
+    }
+    expect_stdout: true
+}
+
+set_mutable_1: {
+    options = {
+        collapse_vars: true,
+        evaluate: true,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        !function a() {
+            a.foo += "";
+            if (a.foo) console.log("PASS");
+            else console.log("FAIL");
+        }();
+    }
+    expect: {
+        !function a() {
+            if (a.foo += "") console.log("PASS");
+            else console.log("FAIL");
+        }();
+    }
+    expect_stdout: "PASS"
+}
+
+set_mutable_2: {
+    options = {
+        cascade: true,
+        conditionals: true,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        !function a() {
+            a.foo += "";
+            if (a.foo) console.log("PASS");
+            else console.log("FAIL");
+        }();
+    }
+    expect: {
+        !function a() {
+            (a.foo += "") ? console.log("PASS") : console.log("FAIL");
+        }();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_2313_1: {
+    options = {
+        cascade: true,
+        conditionals: true,
+        pure_getters: "strict",
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        function x() {
+            console.log(1);
+            return {
+                y: function() {
+                    console.log(2);
+                    return {
+                        z: 0
+                    };
+                }
+            };
+        }
+        x().y().z++;
+        if (x().y().z) {
+            console.log(3);
+        }
+    }
+    expect: {
+        function x() {
+            return console.log(1), {
+                y: function() {
+                    return console.log(2), {
+                        z: 0
+                    };
+                }
+            };
+        }
+        x().y().z++,
+        x().y().z && console.log(3);
+    }
+    expect_stdout: [
+        "1",
+        "2",
+        "1",
+        "2",
+    ]
+}
+
+issue_2313_2: {
+    options = {
+        cascade: true,
+        conditionals: true,
+        pure_getters: true,
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        function x() {
+            console.log(1);
+            return {
+                y: function() {
+                    console.log(2);
+                    return {
+                        z: 0
+                    };
+                }
+            };
+        }
+        x().y().z++;
+        if (x().y().z) {
+            console.log(3);
+        }
+    }
+    expect: {
+        function x() {
+            return console.log(1), {
+                y: function() {
+                    return console.log(2), {
+                        z: 0
+                    };
+                }
+            };
+        }
+        x().y().z++,
+        x().y().z && console.log(3);
+    }
+    expect_stdout: [
+        "1",
+        "2",
+        "1",
+        "2",
+    ]
+}
+
+issue_2313_3: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        pure_getters: "strict",
+    }
+    input: {
+        function x() {
+            console.log(1);
+            return {
+                y: function() {
+                    console.log(2);
+                    return {
+                        z: 0
+                    };
+                }
+            };
+        }
+        x().y().z++;
+        if (x().y().z) {
+            console.log(3);
+        }
+    }
+    expect: {
+        function x() {
+            console.log(1);
+            return {
+                y: function() {
+                    console.log(2);
+                    return {
+                        z: 0
+                    };
+                }
+            };
+        }
+        x().y().z++;
+        x().y().z && console.log(3);
+    }
+    expect_stdout: [
+        "1",
+        "2",
+        "1",
+        "2",
+    ]
+}
+
+issue_2313_4: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        pure_getters: true,
+    }
+    input: {
+        function x() {
+            console.log(1);
+            return {
+                y: function() {
+                    console.log(2);
+                    return {
+                        z: 0
+                    };
+                }
+            };
+        }
+        x().y().z++;
+        if (x().y().z) {
+            console.log(3);
+        }
+    }
+    expect: {
+        function x() {
+            console.log(1);
+            return {
+                y: function() {
+                    console.log(2);
+                    return {
+                        z: 0
+                    };
+                }
+            };
+        }
+        x().y().z++;
+        x().y().z && console.log(3);
+    }
+    expect_stdout: [
+        "1",
+        "2",
+        "1",
+        "2",
+    ]
+}
+
+issue_2313_5: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+    }
+    input: {
+        x().y++;
+        x().y;
+    }
+    expect: {
+        x().y++;
+        x().y;
+    }
+}
+
+issue_2313_6: {
+    options = {
+        pure_getters: true,
+        side_effects: true,
+    }
+    input: {
+        x().y++;
+        x().y;
+    }
+    expect: {
+        x().y++;
+        x();
+    }
+}

test/compress/sandbox.js

@@ -0,0 +1,14 @@
+console_log: {
+    input: {
+        console.log("%% %s");
+        console.log("%% %s", "%s");
+    }
+    expect: {
+        console.log("%% %s");
+        console.log("%% %s", "%s");
+    }
+    expect_stdout: [
+        "%% %s",
+        "% %s",
+    ]
+}

test/compress/screw-ie8.js

@@ -1,9 +1,9 @@
 do_screw: {
     options = {
-        screw_ie8: true,
+        ie8: false,
     }
     beautify = {
-        screw_ie8: true,
+        ie8: false,
         ascii_only: true,
     }
     input: {
@@ -14,10 +14,10 @@ do_screw: {
 
 dont_screw: {
     options = {
-        screw_ie8: false,
+        ie8: true,
     }
     beautify = {
-        screw_ie8: false,
+        ie8: true,
         ascii_only: true,
     }
     input: {
@@ -28,7 +28,7 @@ dont_screw: {
 
 do_screw_constants: {
     options = {
-        screw_ie8: true,
+        ie8: false,
     }
     input: {
         f(undefined, Infinity);
@@ -38,7 +38,7 @@ do_screw_constants: {
 
 dont_screw_constants: {
     options = {
-        screw_ie8: false,
+        ie8: true,
     }
     input: {
         f(undefined, Infinity);
@@ -47,9 +47,15 @@ dont_screw_constants: {
 }
 
 do_screw_try_catch: {
-    options = { screw_ie8: true };
+    options = {
-    mangle = { screw_ie8: true };
+        ie8: false,
-    beautify = { screw_ie8: true };
+    }
+    mangle = {
+        ie8: false,
+    }
+    beautify = {
+        ie8: false,
+    }
     input: {
         good = function(e){
             return function(error){
@@ -75,9 +81,15 @@ do_screw_try_catch: {
 }
 
 dont_screw_try_catch: {
-    options = { screw_ie8: false };
+    options = {
-    mangle = { screw_ie8: false };
+        ie8: true,
-    beautify = { screw_ie8: false };
+    }
+    mangle = {
+        ie8: true,
+    }
+    beautify = {
+        ie8: true,
+    }
     input: {
         bad = function(e){
             return function(error){
@@ -103,9 +115,15 @@ dont_screw_try_catch: {
 }
 
 do_screw_try_catch_undefined: {
-    options = { screw_ie8: true };
+    options = {
-    mangle = { screw_ie8: true };
+        ie8: false,
-    beautify = { screw_ie8: true };
+    }
+    mangle = {
+        ie8: false,
+    }
+    beautify = {
+        ie8: false,
+    }
     input: {
         function a(b){
             try {
@@ -132,9 +150,15 @@ do_screw_try_catch_undefined: {
 }
 
 dont_screw_try_catch_undefined: {
-    options = { screw_ie8: false };
+    options = {
-    mangle = { screw_ie8: false };
+        ie8: true,
-    beautify = { screw_ie8: false };
+    }
+    mangle = {
+        ie8: true,
+    }
+    beautify = {
+        ie8: true,
+    }
     input: {
         function a(b){
             try {
@@ -163,12 +187,13 @@ dont_screw_try_catch_undefined: {
 reduce_vars: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
-        screw_ie8: false,
+        ie8: true,
         unused: true,
     }
     mangle = {
-        screw_ie8: false,
+        ie8: true,
     }
     input: {
         function f() {
@@ -196,38 +221,174 @@ reduce_vars: {
 
 issue_1586_1: {
     options = {
-        screw_ie8: false,
+        ie8: true,
     }
     mangle = {
-        screw_ie8: false,
+        ie8: true,
     }
     input: {
         function f() {
             try {
+                x();
             } catch (err) {
                 console.log(err.message);
             }
         }
     }
-    expect_exact: "function f(){try{}catch(c){console.log(c.message)}}"
+    expect_exact: "function f(){try{x()}catch(c){console.log(c.message)}}"
-    expect_stdout: true
 }
 
 issue_1586_2: {
     options = {
-        screw_ie8: true,
+        ie8: false,
     }
     mangle = {
-        screw_ie8: true,
+        ie8: false,
     }
     input: {
         function f() {
             try {
+                x();
             } catch (err) {
                 console.log(err.message);
             }
         }
     }
-    expect_exact: "function f(){try{}catch(c){console.log(c.message)}}"
+    expect_exact: "function f(){try{x()}catch(c){console.log(c.message)}}"
-    expect_stdout: true
+}
+
+issue_2120_1: {
+    mangle = {
+        ie8: false,
+    }
+    input: {
+        "aaaaaaaa";
+        var a = 1, b = "FAIL";
+        try {
+            throw 1;
+        } catch (c) {
+            try {
+                throw 0;
+            } catch (a) {
+                if (c) b = "PASS";
+            }
+        }
+        console.log(b);
+    }
+    expect: {
+        "aaaaaaaa";
+        var a = 1, b = "FAIL";
+        try {
+            throw 1;
+        } catch (t) {
+            try {
+                throw 0;
+            } catch (a) {
+                if (t) b = "PASS";
+            }
+        }
+        console.log(b);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_2120_2: {
+    mangle = {
+        ie8: true,
+    }
+    input: {
+        "aaaaaaaa";
+        var a = 1, b = "FAIL";
+        try {
+            throw 1;
+        } catch (c) {
+            try {
+                throw 0;
+            } catch (a) {
+                if (c) b = "PASS";
+            }
+        }
+        console.log(b);
+    }
+    expect: {
+        "aaaaaaaa";
+        var a = 1, b = "FAIL";
+        try {
+            throw 1;
+        } catch (c) {
+            try {
+                throw 0;
+            } catch (a) {
+                if (c) b = "PASS";
+            }
+        }
+        console.log(b);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_2254_1: {
+    mangle = {
+        ie8: false,
+    }
+    input: {
+        "eeeeee";
+        try {
+            console.log(f("PASS"));
+        } catch (e) {}
+        function f(s) {
+            try {
+                throw "FAIL";
+            } catch (e) {
+                return s;
+            }
+        }
+    }
+    expect: {
+        "eeeeee";
+        try {
+            console.log(f("PASS"));
+        } catch (e) {}
+        function f(e) {
+            try {
+                throw "FAIL";
+            } catch (t) {
+                return e;
+            }
+        }
+    }
+    expect_stdout: "PASS"
+}
+
+issue_2254_2: {
+    mangle = {
+        ie8: true,
+    }
+    input: {
+        "eeeeee";
+        try {
+            console.log(f("PASS"));
+        } catch (e) {}
+        function f(s) {
+            try {
+                throw "FAIL";
+            } catch (e) {
+                return s;
+            }
+        }
+    }
+    expect: {
+        "eeeeee";
+        try {
+            console.log(f("PASS"));
+        } catch (e) {}
+        function f(t) {
+            try {
+                throw "FAIL";
+            } catch (e) {
+                return t;
+            }
+        }
+    }
+    expect_stdout: "PASS"
 }

test/compress/sequences.js

@@ -176,6 +176,11 @@ for_sequences: {
         // 4
         x = (foo in bar);
         for (y = 5; false;);
+        // 5
+        x = function() {
+            foo in bar;
+        };
+        for (y = 5; false;);
     }
     expect: {
         // 1
@@ -188,6 +193,10 @@ for_sequences: {
         // 4
         x = (foo in bar);
         for (y = 5; false;);
+        // 5
+        for (x = function() {
+            foo in bar;
+        }, y = 5; false;);
     }
 }
 
@@ -440,3 +449,334 @@ func_def_5: {
     }
     expect_stdout: "true"
 }
+
+issue_1758: {
+    options = {
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(function(c) {
+            var undefined = 42;
+            return function() {
+                c--;
+                c--, c.toString();
+                return;
+            }();
+        }());
+    }
+    expect: {
+        console.log(function(c) {
+            var undefined = 42;
+            return function() {
+                return c--, c--, void c.toString();
+            }();
+        }());
+    }
+    expect_stdout: "undefined"
+}
+
+delete_seq_1: {
+    options = {
+        booleans: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(delete (1, undefined));
+        console.log(delete (1, void 0));
+        console.log(delete (1, Infinity));
+        console.log(delete (1, 1 / 0));
+        console.log(delete (1, NaN));
+        console.log(delete (1, 0 / 0));
+    }
+    expect: {
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+    }
+    expect_stdout: true
+}
+
+delete_seq_2: {
+    options = {
+        booleans: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(delete (1, 2, undefined));
+        console.log(delete (1, 2, void 0));
+        console.log(delete (1, 2, Infinity));
+        console.log(delete (1, 2, 1 / 0));
+        console.log(delete (1, 2, NaN));
+        console.log(delete (1, 2, 0 / 0));
+    }
+    expect: {
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+    }
+    expect_stdout: true
+}
+
+delete_seq_3: {
+    options = {
+        booleans: true,
+        keep_infinity: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(delete (1, 2, undefined));
+        console.log(delete (1, 2, void 0));
+        console.log(delete (1, 2, Infinity));
+        console.log(delete (1, 2, 1 / 0));
+        console.log(delete (1, 2, NaN));
+        console.log(delete (1, 2, 0 / 0));
+    }
+    expect: {
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+    }
+    expect_stdout: true
+}
+
+delete_seq_4: {
+    options = {
+        booleans: true,
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        function f() {}
+        console.log(delete (f(), undefined));
+        console.log(delete (f(), void 0));
+        console.log(delete (f(), Infinity));
+        console.log(delete (f(), 1 / 0));
+        console.log(delete (f(), NaN));
+        console.log(delete (f(), 0 / 0));
+    }
+    expect: {
+        function f() {}
+        console.log((f(), !0)),
+        console.log((f(), !0)),
+        console.log((f(), !0)),
+        console.log((f(), !0)),
+        console.log((f(), !0)),
+        console.log((f(), !0));
+    }
+    expect_stdout: true
+}
+
+delete_seq_5: {
+    options = {
+        booleans: true,
+        keep_infinity: true,
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        function f() {}
+        console.log(delete (f(), undefined));
+        console.log(delete (f(), void 0));
+        console.log(delete (f(), Infinity));
+        console.log(delete (f(), 1 / 0));
+        console.log(delete (f(), NaN));
+        console.log(delete (f(), 0 / 0));
+    }
+    expect: {
+        function f() {}
+        console.log((f(), !0)),
+        console.log((f(), !0)),
+        console.log((f(), !0)),
+        console.log((f(), !0)),
+        console.log((f(), !0)),
+        console.log((f(), !0));
+    }
+    expect_stdout: true
+}
+
+delete_seq_6: {
+    options = {
+        booleans: true,
+        side_effects: true,
+    }
+    input: {
+        var a;
+        console.log(delete (1, a));
+    }
+    expect: {
+        var a;
+        console.log(!0);
+    }
+    expect_stdout: true
+}
+
+side_effects: {
+    options = {
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        0, a(), 1, b(), 2, c(), 3;
+    }
+    expect: {
+        a(), b(), c();
+    }
+}
+
+side_effects_cascade_1: {
+    options = {
+        cascade: true,
+        conditionals: true,
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        function f(a, b) {
+            a -= 42;
+            if (a < 0) a = 0;
+            b.a = a;
+        }
+    }
+    expect: {
+        function f(a, b) {
+            (a -= 42) < 0 && (a = 0), b.a = a;
+        }
+    }
+}
+
+side_effects_cascade_2: {
+    options = {
+        cascade: true,
+        side_effects: true,
+    }
+    input: {
+        function f(a, b) {
+            b = a,
+            !a + (b += a) || (b += a),
+            b = a,
+            b;
+        }
+    }
+    expect: {
+        function f(a, b) {
+            b = a,
+            !a + (b += a) || (b += a),
+            b = a;
+        }
+    }
+}
+
+side_effects_cascade_3: {
+    options = {
+        cascade: true,
+        conditionals: true,
+        side_effects: true,
+    }
+    input: {
+        function f(a, b) {
+            "foo" ^ (b += a),
+            b ? false : (b = a) ? -1 : (b -= a) - (b ^= a),
+            a-- || !a,
+            a;
+        }
+    }
+    expect: {
+        function f(a, b) {
+            !(b += a) && ((b = a) || (b -= a, b ^= a)),
+            --a;
+        }
+    }
+}
+
+issue_27: {
+    options = {
+        cascade: true,
+        passes: 2,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function(jQuery) {
+            var $;
+            $ = jQuery;
+            $("body").addClass("foo");
+        })(jQuery);
+    }
+    expect: {
+        (function(jQuery) {
+            jQuery("body").addClass("foo");
+        })(jQuery);
+    }
+}
+
+issue_2062: {
+    options = {
+        booleans: true,
+        cascade: true,
+        conditionals: true,
+        side_effects: true,
+    }
+    input: {
+        var a = 1;
+        if ([ a || a++ + a--, a++ + a--, a && a.var ]);
+        console.log(a);
+    }
+    expect: {
+        var a = 1;
+        a || (a++, a--), a++, --a && a.var;
+        console.log(a);
+    }
+    expect_stdout: "1"
+}
+
+issue_2313: {
+    options = {
+        cascade: true,
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        var a = 0, b = 0;
+        var foo = {
+            get c() {
+                a++;
+                return 42;
+            },
+            set c(c) {
+                b++;
+            },
+            d: function() {
+                this.c++;
+                if (this.c) console.log(a, b);
+            }
+        }
+        foo.d();
+    }
+    expect: {
+        var a = 0, b = 0;
+        var foo = {
+            get c() {
+                return a++, 42;
+            },
+            set c(c) {
+                b++;
+            },
+            d: function() {
+                if (this.c++, this.c) console.log(a, b);
+            }
+        }
+        foo.d();
+    }
+    expect_stdout: "2 1"
+}

test/compress/string-literal.js

@@ -8,3 +8,12 @@ octal_escape_sequence: {
         var border_check = "\x20\x30\x38\x30\x00\x30\xc0\x30";
     }
 }
+
+issue_1929: {
+    input: {
+        function f(s) {
+            return s.split(/[\\/]/);
+        }
+    }
+    expect_exact: "function f(s){return s.split(/[\\\\/]/)}"
+}

test/compress/switch.js

@@ -1,5 +1,10 @@
 constant_switch_1: {
-    options = { dead_code: true, evaluate: true };
+    options = {
+        dead_code: true,
+        evaluate: true,
+        side_effects: true,
+        switches: true,
+    }
     input: {
         switch (1+1) {
           case 1: foo(); break;
@@ -13,7 +18,12 @@ constant_switch_1: {
 }
 
 constant_switch_2: {
-    options = { dead_code: true, evaluate: true };
+    options = {
+        dead_code: true,
+        evaluate: true,
+        side_effects: true,
+        switches: true,
+    }
     input: {
         switch (1) {
           case 1: foo();
@@ -28,7 +38,12 @@ constant_switch_2: {
 }
 
 constant_switch_3: {
-    options = { dead_code: true, evaluate: true };
+    options = {
+        dead_code: true,
+        evaluate: true,
+        side_effects: true,
+        switches: true,
+    }
     input: {
         switch (10) {
           case 1: foo();
@@ -44,7 +59,12 @@ constant_switch_3: {
 }
 
 constant_switch_4: {
-    options = { dead_code: true, evaluate: true };
+    options = {
+        dead_code: true,
+        evaluate: true,
+        side_effects: true,
+        switches: true,
+    }
     input: {
         switch (2) {
           case 1:
@@ -65,7 +85,12 @@ constant_switch_4: {
 }
 
 constant_switch_5: {
-    options = { dead_code: true, evaluate: true };
+    options = {
+        dead_code: true,
+        evaluate: true,
+        side_effects: true,
+        switches: true,
+    }
     input: {
         switch (1) {
           case 1:
@@ -94,7 +119,12 @@ constant_switch_5: {
 }
 
 constant_switch_6: {
-    options = { dead_code: true, evaluate: true };
+    options = {
+        dead_code: true,
+        evaluate: true,
+        side_effects: true,
+        switches: true,
+    }
     input: {
         OUT: {
             foo();
@@ -123,7 +153,12 @@ constant_switch_6: {
 }
 
 constant_switch_7: {
-    options = { dead_code: true, evaluate: true };
+    options = {
+        dead_code: true,
+        evaluate: true,
+        side_effects: true,
+        switches: true,
+    }
     input: {
         OUT: {
             foo();
@@ -161,7 +196,12 @@ constant_switch_7: {
 }
 
 constant_switch_8: {
-    options = { dead_code: true, evaluate: true };
+    options = {
+        dead_code: true,
+        evaluate: true,
+        side_effects: true,
+        switches: true,
+    }
     input: {
         OUT: switch (1) {
           case 1:
@@ -185,7 +225,12 @@ constant_switch_8: {
 }
 
 constant_switch_9: {
-    options = { dead_code: true, evaluate: true };
+    options = {
+        dead_code: true,
+        evaluate: true,
+        side_effects: true,
+        switches: true,
+    }
     input: {
         OUT: switch (1) {
           case 1:
@@ -210,7 +255,10 @@ constant_switch_9: {
 }
 
 drop_default_1: {
-    options = { dead_code: true };
+    options = {
+        dead_code: true,
+        switches: true,
+    }
     input: {
         switch (foo) {
           case 'bar': baz();
@@ -225,7 +273,10 @@ drop_default_1: {
 }
 
 drop_default_2: {
-    options = { dead_code: true };
+    options = {
+        dead_code: true,
+        switches: true,
+    }
     input: {
         switch (foo) {
           case 'bar': baz(); break;
@@ -241,7 +292,10 @@ drop_default_2: {
 }
 
 keep_default: {
-    options = { dead_code: true };
+    options = {
+        dead_code: true,
+        switches: true,
+    }
     input: {
         switch (foo) {
           case 'bar': baz();
@@ -263,6 +317,8 @@ issue_1663: {
     options = {
         dead_code: true,
         evaluate: true,
+        side_effects: true,
+        switches: true,
     }
     input: {
         var a = 100, b = 10;
@@ -294,6 +350,7 @@ issue_1663: {
 drop_case: {
     options = {
         dead_code: true,
+        switches: true,
     }
     input: {
         switch (foo) {
@@ -312,6 +369,7 @@ drop_case: {
 keep_case: {
     options = {
         dead_code: true,
+        switches: true,
     }
     input: {
         switch (foo) {
@@ -332,6 +390,7 @@ issue_376: {
     options = {
         dead_code: true,
         evaluate: true,
+        switches: true,
     }
     input: {
         switch (true) {
@@ -354,6 +413,7 @@ issue_376: {
 issue_441_1: {
     options = {
         dead_code: true,
+        switches: true,
     }
     input: {
         switch (foo) {
@@ -381,6 +441,7 @@ issue_441_1: {
 issue_441_2: {
     options = {
         dead_code: true,
+        switches: true,
     }
     input: {
         switch (foo) {
@@ -414,6 +475,8 @@ issue_1674: {
     options = {
         dead_code: true,
         evaluate: true,
+        side_effects: true,
+        switches: true,
     }
     input: {
         switch (0) {
@@ -435,6 +498,7 @@ issue_1679: {
     options = {
         dead_code: true,
         evaluate: true,
+        switches: true,
     }
     input: {
         var a = 100, b = 10;
@@ -482,6 +546,7 @@ issue_1680_1: {
     options = {
         dead_code: true,
         evaluate: true,
+        switches: true,
     }
     input: {
         function f(x) {
@@ -522,6 +587,7 @@ issue_1680_1: {
 issue_1680_2: {
     options = {
         dead_code: true,
+        switches: true,
     }
     input: {
         var a = 100, b = 10;
@@ -557,6 +623,7 @@ issue_1680_2: {
 issue_1690_1: {
     options = {
         dead_code: true,
+        switches: true,
     }
     input: {
         switch (console.log("PASS")) {}
@@ -570,6 +637,7 @@ issue_1690_1: {
 issue_1690_2: {
     options = {
         dead_code: false,
+        switches: true,
     }
     input: {
         switch (console.log("PASS")) {}
@@ -585,6 +653,7 @@ if_switch_typeof: {
         conditionals: true,
         dead_code: true,
         side_effects: true,
+        switches: true,
     }
     input: {
         if (a) switch(typeof b) {}
@@ -597,6 +666,7 @@ if_switch_typeof: {
 issue_1698: {
     options = {
         side_effects: true,
+        switches: true,
     }
     input: {
         var a = 1;
@@ -618,6 +688,7 @@ issue_1698: {
 issue_1705_1: {
     options = {
         dead_code: true,
+        switches: true,
     }
     input: {
         var a = 0;
@@ -643,9 +714,11 @@ issue_1705_2: {
     options = {
         dead_code: true,
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         side_effects: true,
+        switches: true,
         toplevel: true,
         unused: true,
     }
@@ -666,6 +739,7 @@ issue_1705_2: {
 issue_1705_3: {
     options = {
         dead_code: true,
+        switches: true,
     }
     input: {
         switch (a) {
@@ -680,3 +754,66 @@ issue_1705_3: {
     }
     expect_stdout: true
 }
+
+beautify: {
+    beautify = {
+        beautify: true,
+    }
+    input: {
+        switch (a) {
+          case 0:
+          case 1:
+            break;
+          case 2:
+          default:
+        }
+        switch (b) {
+          case 3:
+            foo();
+            bar();
+          default:
+            break;
+        }
+    }
+    expect_exact: [
+        "switch (a) {",
+        "  case 0:",
+        "  case 1:",
+        "    break;",
+        "",
+        "  case 2:",
+        "  default:",
+        "}",
+        "",
+        "switch (b) {",
+        "  case 3:",
+        "    foo();",
+        "    bar();",
+        "",
+        "  default:",
+        "    break;",
+        "}",
+    ]
+}
+
+issue_1758: {
+    options = {
+        dead_code: true,
+        switches: true,
+    }
+    input: {
+        var a = 1, b = 2;
+        switch (a--) {
+          default:
+            b++;
+        }
+        console.log(a, b);
+    }
+    expect: {
+        var a = 1, b = 2;
+        a--;
+        b++;
+        console.log(a, b);
+    }
+    expect_stdout: "0 3"
+}

test/compress/unicode.js

@@ -15,3 +15,43 @@ unicode_parse_variables: {
         var l০ = 3;
     }
 }
+
+issue_2242_1: {
+    beautify = {
+        ascii_only: false,
+    }
+    input: {
+        console.log("\ud83d", "\ude00", "\ud83d\ude00", "\ud83d@\ude00");
+    }
+    expect_exact: 'console.log("\\ud83d","\\ude00","\ud83d\ude00","\\ud83d@\\ude00");'
+}
+
+issue_2242_2: {
+    beautify = {
+        ascii_only: true,
+    }
+    input: {
+        console.log("\ud83d", "\ude00", "\ud83d\ude00", "\ud83d@\ude00");
+    }
+    expect_exact: 'console.log("\\ud83d","\\ude00","\\ud83d\\ude00","\\ud83d@\\ude00");'
+}
+
+issue_2242_3: {
+    options = {
+        evaluate: false,
+    }
+    input: {
+        console.log("\ud83d" + "\ude00", "\ud83d" + "@" + "\ude00");
+    }
+    expect_exact: 'console.log("\\ud83d"+"\\ude00","\\ud83d"+"@"+"\\ude00");'
+}
+
+issue_2242_4: {
+    options = {
+        evaluate: true,
+    }
+    input: {
+        console.log("\ud83d" + "\ude00", "\ud83d" + "@" + "\ude00");
+    }
+    expect_exact: 'console.log("\ud83d\ude00","\\ud83d@\\ude00");'
+}

test/exports.js

@@ -0,0 +1,14 @@
+exports["Compressor"] = Compressor;
+exports["JS_Parse_Error"] = JS_Parse_Error;
+exports["OutputStream"] = OutputStream;
+exports["SourceMap"] = SourceMap;
+exports["TreeWalker"] = TreeWalker;
+exports["base54"] = base54;
+exports["defaults"] = defaults;
+exports["mangle_properties"] = mangle_properties;
+exports["minify"] = minify;
+exports["parse"] = parse;
+exports["reserve_quoted_keys"] = reserve_quoted_keys;
+exports["string_template"] = string_template;
+exports["tokenizer"] = tokenizer;
+exports["is_identifier"] = is_identifier;

test/fetch.js

@@ -0,0 +1,31 @@
+var fs = require("fs");
+var path = require("path");
+
+try {
+    fs.mkdirSync("./tmp");
+} catch (e) {
+    if (e.code != "EEXIST") throw e;
+}
+
+function local(url) {
+    return path.join("./tmp", encodeURIComponent(url));
+}
+
+function read(url) {
+    return fs.createReadStream(local(url));
+}
+
+module.exports = function(url, callback) {
+    var result = read(url);
+    result.on("error", function(e) {
+        if (e.code != "ENOENT") return callback(e);
+        require(url.slice(0, url.indexOf(":"))).get(url, function(res) {
+            if (res.statusCode !== 200) return callback(res);
+            res.pipe(fs.createWriteStream(local(url)).on("close", function() {
+                callback(null, read(url));
+            }));
+        });
+    }).on("open", function() {
+        callback(null, result);
+    });
+};

test/input/invalid/assign_4.js

@@ -0,0 +1 @@
+++null

test/input/invalid/delete.js

@@ -0,0 +1,14 @@
+function f(x) {
+    delete 42;
+    delete (0, x);
+    delete null;
+    delete x;
+}
+
+function g(x) {
+    "use strict";
+    delete 42;
+    delete (0, x);
+    delete null;
+    delete x;
+}

test/input/invalid/dot_1.js

@@ -0,0 +1 @@
+a.=

test/input/invalid/dot_2.js

@@ -0,0 +1 @@
+%.a;

test/input/invalid/dot_3.js

@@ -0,0 +1 @@
+a./();

test/input/invalid/else.js

@@ -0,0 +1 @@
+if (0) else 1;

test/input/invalid/for-in_1.js

@@ -0,0 +1,4 @@
+var a, b = [1, 2];
+for (1, 2, a in b) {
+    console.log(a, b[a]);
+}

test/input/invalid/for-in_2.js

@@ -0,0 +1,4 @@
+var c = [1, 2];
+for (var a, b in c) {
+    console.log(a, c[a]);
+}

test/input/invalid/function_1.js

@@ -0,0 +1,6 @@
+function f(arguments) {
+}
+
+function g(arguments) {
+    "use strict";
+}

test/input/invalid/function_2.js

@@ -0,0 +1,6 @@
+function arguments() {
+}
+
+function eval() {
+    "use strict";
+}

test/input/invalid/function_3.js

@@ -0,0 +1,6 @@
+!function eval() {
+}();
+
+!function arguments() {
+    "use strict";
+}();

test/input/invalid/object.js

@@ -0,0 +1 @@
+console.log({%: 1});

test/input/invalid/return.js

@@ -0,0 +1 @@
+return 42;

test/input/invalid/try.js

@@ -0,0 +1,8 @@
+function f() {
+    try {} catch (eval) {}
+}
+
+function g() {
+    "use strict";
+    try {} catch (eval) {}
+}

test/input/invalid/var.js

@@ -0,0 +1,8 @@
+function f() {
+    var eval;
+}
+
+function g() {
+    "use strict";
+    var eval;
+}

test/input/issue-2082/sample.js

@@ -0,0 +1 @@
+console.log(x);

test/input/issue-2082/sample.js.map

@@ -0,0 +1 @@
+{"version": 3,"sources": ["index.js"],"mappings": ";"}

test/input/issue-2310/input.js

@@ -0,0 +1,10 @@
+function foo() {
+    return function() {
+        console.log("PASS");
+    };
+}
+
+(function() {
+    var f = foo();
+    f();
+})();

test/input/issue-505/input.js

@@ -0,0 +1,5 @@
+function test(callback) {
+    'aaaaaaaaaaaaaaaa';
+    callback(err, data);
+    callback(err, data);
+}

test/input/issue-505/output.js

@@ -0,0 +1,5 @@
+function test(a){
+"aaaaaaaaaaaaaaaa"
+;a(err,data),a(err,data)
+}
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIjAiXSwibmFtZXMiOlsidGVzdCIsImNhbGxiYWNrIiwiZXJyIiwiZGF0YSJdLCJtYXBwaW5ncyI6IkFBQUEsU0FBU0EsS0FBS0M7QUFDVjtDQUNBQSxFQUFTQyxJQUFLQyxNQUNkRixFQUFTQyxJQUFLQyJ9

test/input/issue-520/output.js

@@ -1,2 +1,2 @@
 new function(){console.log(3)};
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInN0ZGluIl0sIm5hbWVzIjpbImNvbnNvbGUiLCJsb2ciXSwibWFwcGluZ3MiOiJBQUErQyxHQUFyQyxZQUFnQkEsUUFBUUMsSUFBSSIsInNvdXJjZXNDb250ZW50IjpbImNsYXNzIEZvbyB7IGNvbnN0cnVjdG9yKCl7Y29uc29sZS5sb2coMSsyKTt9IH0gbmV3IEZvbygpO1xuIl19
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInN0ZGluIl0sIm5hbWVzIjpbImNvbnNvbGUiLCJsb2ciXSwibWFwcGluZ3MiOiJBQUErQyxJQUFyQyxXQUFnQkEsUUFBUUMsSUFBSSIsInNvdXJjZXNDb250ZW50IjpbImNsYXNzIEZvbyB7IGNvbnN0cnVjdG9yKCl7Y29uc29sZS5sb2coMSsyKTt9IH0gbmV3IEZvbygpO1xuIl19

test/jetstream.js

@@ -3,7 +3,7 @@
 
 "use strict";
 
-var site = "http://browserbench.org/JetStream/";
+var site = "http://browserbench.org/JetStream";
 if (typeof phantom == "undefined") {
     // workaround for tty output truncation upon process.exit()
     [process.stdout, process.stderr].forEach(function(stream){
@@ -11,45 +11,69 @@ if (typeof phantom == "undefined") {
             stream._handle.setBlocking(true);
     });
     var args = process.argv.slice(2);
+    var debug = args.indexOf("--debug");
+    if (debug >= 0) {
+        args.splice(debug, 1);
+        debug = true;
+    } else {
+        debug = false;
+    }
     if (!args.length) {
-        args.push("-mc", "warnings=false");
+        args.push("-mcb", "beautify=false,webkit");
     }
-    args.push("--stats");
+    args.push("--timings");
     var child_process = require("child_process");
-    try {
+    var fetch = require("./fetch");
-        require("phantomjs-prebuilt");
-    } catch(e) {
-        child_process.execSync("npm install phantomjs-prebuilt@2.1.14");
-    }
     var http = require("http");
     var server = http.createServer(function(request, response) {
         request.resume();
-        var url = decodeURIComponent(request.url.slice(1));
+        var url = site + request.url;
-        var stderr = "";
+        fetch(url, function(err, res) {
-        var uglifyjs = child_process.fork("bin/uglifyjs", args, {
+            if (err) throw err;
-            silent: true
+            response.writeHead(200, {
-        }).on("exit", function(code) {
+                "Content-Type": {
-            console.log("uglifyjs", url.indexOf(site) == 0 ? url.slice(site.length) : url, args.join(" "));
+                    css: "text/css",
-            console.log(stderr);
+                    js: "application/javascript",
-            if (code) throw new Error("uglifyjs failed with code " + code);
+                    png: "image/png"
-        });
+                }[url.slice(url.lastIndexOf(".") + 1)] || "text/html; charset=utf-8"
-        uglifyjs.stderr.on("data", function(data) {
+            });
-            stderr += data;
+            if (/\.js$/.test(url)) {
-        }).setEncoding("utf8");
+                var stderr = "";
-        uglifyjs.stdout.pipe(response);
+                var uglifyjs = child_process.fork("bin/uglifyjs", args, {
-        http.get(url, function(res) {
+                    silent: true
-            res.pipe(uglifyjs.stdin);
+                }).on("exit", function(code) {
-        });
+                    console.log("uglifyjs", url.slice(site.length + 1), args.join(" "));
-    }).listen().on("listening", function() {
+                    console.log(stderr);
-        var phantomjs = require("phantomjs-prebuilt");
+                    if (code) throw new Error("uglifyjs failed with code " + code);
-        var program = phantomjs.exec(process.argv[1], server.address().port);
+                });
-        program.stdout.pipe(process.stdout);
+                uglifyjs.stderr.on("data", function(data) {
-        program.stderr.pipe(process.stderr);
+                    stderr += data;
-        program.on("exit", function(code) {
+                }).setEncoding("utf8");
-            server.close();
+                uglifyjs.stdout.pipe(response);
-            if (code) throw new Error("JetStream failed!");
+                res.pipe(uglifyjs.stdin);
-            console.log("JetStream completed successfully.");
+            } else {
+                res.pipe(response);
+            }
         });
+    }).listen();
+    server.on("listening", function() {
+        var port = server.address().port;
+        if (debug) {
+            console.log("http://localhost:" + port + "/");
+        } else {
+            child_process.exec("npm install phantomjs-prebuilt@2.1.14 --no-save", function(error) {
+                if (error) throw error;
+                var program = require("phantomjs-prebuilt").exec(process.argv[1], port);
+                program.stdout.pipe(process.stdout);
+                program.stderr.pipe(process.stderr);
+                program.on("exit", function(code) {
+                    server.close();
+                    if (code) throw new Error("JetStream failed!");
+                    console.log("JetStream completed successfully.");
+                    process.exit(0);
+                });
+            });
+        }
     });
     server.timeout = 0;
 } else {
@@ -63,10 +87,6 @@ if (typeof phantom == "undefined") {
         phantom.exit(1);
     };
     var url = "http://localhost:" + require("system").args[1] + "/";
-    page.onResourceRequested = function(requestData, networkRequest) {
-        if (/\.js$/.test(requestData.url))
-            networkRequest.changeUrl(url + encodeURIComponent(requestData.url));
-    }
     page.onConsoleMessage = function(msg) {
         if (/Error:/i.test(msg)) {
             console.error(msg);
@@ -77,8 +97,8 @@ if (typeof phantom == "undefined") {
             phantom.exit();
         }
     };
-    page.open(site, function(status) {
+    page.open(url, function(status) {
-        if (status != "success") phantomjs.exit(1);
+        if (status != "success") phantom.exit(1);
         page.evaluate(function() {
             JetStream.switchToQuick();
             JetStream.start();

test/mocha/accessorTokens-1492.js

@@ -1,4 +1,4 @@
-var UglifyJS = require('../../');
+var UglifyJS = require("../node");
 var assert = require("assert");
 
 describe("Accessor tokens", function() {
@@ -16,7 +16,7 @@ describe("Accessor tokens", function() {
                 assert.equal(node.start.pos, 12);
                 assert.equal(node.end.endpos, 46);
 
-                assert(node.key instanceof UglifyJS.AST_SymbolRef);
+                assert(node.key instanceof UglifyJS.AST_SymbolAccessor);
                 assert.equal(node.key.start.pos, 16);
                 assert.equal(node.key.end.endpos, 22);
 

test/mocha/arguments.js

@@ -1,4 +1,4 @@
-var UglifyJS = require('../../');
+var UglifyJS = require("../node");
 var assert = require("assert");
 
 describe("arguments", function() {

test/mocha/cli.js

@@ -2,10 +2,14 @@ var assert = require("assert");
 var exec = require("child_process").exec;
 var readFileSync = require("fs").readFileSync;
 
+function read(path) {
+    return readFileSync(path, "utf8");
+}
+
 describe("bin/uglifyjs", function () {
     var uglifyjscmd = '"' + process.argv[0] + '" bin/uglifyjs';
     it("should produce a functional build when using --self", function (done) {
-        this.timeout(15000);
+        this.timeout(30000);
 
         var command = uglifyjscmd + ' --self -cm --wrap WrappedUglifyJS';
 
@@ -15,12 +19,14 @@ describe("bin/uglifyjs", function () {
             eval(stdout);
 
             assert.strictEqual(typeof WrappedUglifyJS, 'object');
-            assert.strictEqual(true, WrappedUglifyJS.parse('foo;') instanceof WrappedUglifyJS.AST_Node);
+            var result = WrappedUglifyJS.minify("foo([true,,2+3]);");
+            assert.strictEqual(result.error, undefined);
+            assert.strictEqual(result.code, "foo([!0,,5]);");
 
             done();
         });
     });
-    it("Should be able to filter comments correctly with `--comment all`", function (done) {
+    it("Should be able to filter comments correctly with `--comments all`", function (done) {
         var command = uglifyjscmd + ' test/input/comments/filter.js --comments all';
 
         exec(command, function (err, stdout) {
@@ -50,18 +56,18 @@ describe("bin/uglifyjs", function () {
             done();
         });
     });
-    it("Should append source map to output when using --source-map-inline", function (done) {
+    it("Should append source map to output when using --source-map url=inline", function (done) {
-       var command = uglifyjscmd + ' test/input/issue-1323/sample.js --source-map-inline';
+        var command = uglifyjscmd + " test/input/issue-1323/sample.js --source-map url=inline";
 
-       exec(command, function (err, stdout) {
+        exec(command, function (err, stdout) {
-           if (err) throw err;
+            if (err) throw err;
 
-           assert.strictEqual(stdout, "var bar=function(){function foo(bar){return bar}return foo}();\n" +
+            assert.strictEqual(stdout, "var bar=function(){function foo(bar){return bar}return foo}();\n" +
-               "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMTMyMy9zYW1wbGUuanMiXSwibmFtZXMiOlsiYmFyIiwiZm9vIl0sIm1hcHBpbmdzIjoiQUFBQSxHQUFJQSxLQUFNLFdBQ04sUUFBU0MsS0FBS0QsS0FDVixNQUFPQSxLQUdYLE1BQU9DIn0=\n");
+                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMTMyMy9zYW1wbGUuanMiXSwibmFtZXMiOlsiYmFyIiwiZm9vIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFJQSxJQUFNLFdBQ04sU0FBU0MsSUFBS0QsS0FDVixPQUFPQSxJQUdYLE9BQU9DLElBTEQifQ==\n");
-           done();
+            done();
-       });
+        });
     });
-    it("should not append source map to output when not using --source-map-inline", function (done) {
+    it("should not append source map to output when not using --source-map url=inline", function (done) {
         var command = uglifyjscmd + ' test/input/issue-1323/sample.js';
 
         exec(command, function (err, stdout) {
@@ -71,131 +77,152 @@ describe("bin/uglifyjs", function () {
             done();
         });
     });
-    it("Should work with --keep-fnames (mangle only)", function (done) {
+    it("should not consider source map file content as source map file name (issue #2082)", function (done) {
-       var command = uglifyjscmd + ' test/input/issue-1431/sample.js --keep-fnames -m';
+        var command = [
-
+            uglifyjscmd,
-       exec(command, function (err, stdout) {
+            "test/input/issue-2082/sample.js",
-           if (err) throw err;
+            "--source-map", "content=test/input/issue-2082/sample.js.map",
-
+            "--source-map", "url=inline",
-           assert.strictEqual(stdout, "function f(r){return function(){function n(n){return n*n}return r(n)}}function g(n){return n(1)+n(2)}console.log(f(g)()==5);\n");
+        ].join(" ");
-           done();
-       });
-    });
-    it("Should work with --keep-fnames (mangle & compress)", function (done) {
-       var command = uglifyjscmd + ' test/input/issue-1431/sample.js --keep-fnames -m -c unused=false';
-
-       exec(command, function (err, stdout) {
-           if (err) throw err;
-
-           assert.strictEqual(stdout, "function f(r){return function(){function n(n){return n*n}return r(n)}}function g(n){return n(1)+n(2)}console.log(5==f(g)());\n");
-           done();
-       });
-    });
-    it("Should work with keep_fnames under mangler options", function (done) {
-       var command = uglifyjscmd + ' test/input/issue-1431/sample.js -m keep_fnames=true';
-
-       exec(command, function (err, stdout) {
-           if (err) throw err;
-
-           assert.strictEqual(stdout, "function f(r){return function(){function n(n){return n*n}return r(n)}}function g(n){return n(1)+n(2)}console.log(f(g)()==5);\n");
-           done();
-       });
-    });
-    it("Should work with --define (simple)", function (done) {
-       var command = uglifyjscmd + ' test/input/global_defs/simple.js --define D=5 -c';
-
-       exec(command, function (err, stdout) {
-           if (err) throw err;
-
-           assert.strictEqual(stdout, "console.log(5);\n");
-           done();
-       });
-    });
-    it("Should work with --define (nested)", function (done) {
-       var command = uglifyjscmd + ' test/input/global_defs/nested.js --define C.D=5,C.V=3 -c';
-
-       exec(command, function (err, stdout) {
-           if (err) throw err;
-
-           assert.strictEqual(stdout, "console.log(3,5);\n");
-           done();
-       });
-    });
-    it("Should work with --define (AST_Node)", function (done) {
-       var command = uglifyjscmd + ' test/input/global_defs/simple.js --define console.log=stdout.println -c';
-
-       exec(command, function (err, stdout) {
-           if (err) throw err;
-
-           assert.strictEqual(stdout, "stdout.println(D);\n");
-           done();
-       });
-    });
-    it("Should work with `--beautify`", function (done) {
-       var command = uglifyjscmd + ' test/input/issue-1482/input.js -b';
-
-       exec(command, function (err, stdout) {
-           if (err) throw err;
-
-           assert.strictEqual(stdout, readFileSync("test/input/issue-1482/default.js", "utf8"));
-           done();
-       });
-    });
-    it("Should work with `--beautify bracketize`", function (done) {
-       var command = uglifyjscmd + ' test/input/issue-1482/input.js -b bracketize';
-
-       exec(command, function (err, stdout) {
-           if (err) throw err;
-
-           assert.strictEqual(stdout, readFileSync("test/input/issue-1482/bracketize.js", "utf8"));
-           done();
-       });
-    });
-    it("Should process inline source map", function(done) {
-        var command = uglifyjscmd + ' test/input/issue-520/input.js -mc toplevel --in-source-map inline --source-map-inline';
-
-        exec(command, function (err, stdout) {
-            if (err) throw err;
-
-            assert.strictEqual(stdout, readFileSync("test/input/issue-520/output.js", "utf8"));
-            done();
-        });
-    });
-    it("Should warn for missing inline source map", function(done) {
-        var command = uglifyjscmd + ' test/input/issue-1323/sample.js --in-source-map inline';
 
         exec(command, function (err, stdout, stderr) {
             if (err) throw err;
 
-            assert.strictEqual(stdout, "var bar=function(){function foo(bar){return bar}return foo}();\n");
+            var stderrLines = stderr.split('\n');
+            assert.strictEqual(stderrLines[0], 'INFO: Using input source map: test/input/issue-2082/sample.js.map');
+            assert.notStrictEqual(stderrLines[1], 'INFO: Using input source map: {"version": 3,"sources": ["index.js"],"mappings": ";"}');
+            done();
+        });
+    });
+    it("Should work with --keep-fnames (mangle only)", function (done) {
+        var command = uglifyjscmd + ' test/input/issue-1431/sample.js --keep-fnames -m';
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, "function f(r){return function(){function n(n){return n*n}return r(n)}}function g(n){return n(1)+n(2)}console.log(f(g)()==5);\n");
+            done();
+        });
+    });
+    it("Should work with --keep-fnames (mangle & compress)", function (done) {
+        var command = uglifyjscmd + ' test/input/issue-1431/sample.js --keep-fnames -m -c unused=false';
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, "function f(r){return function(){function n(n){return n*n}return r(n)}}function g(n){return n(1)+n(2)}console.log(5==f(g)());\n");
+            done();
+        });
+    });
+    it("Should work with keep_fnames under mangler options", function (done) {
+        var command = uglifyjscmd + ' test/input/issue-1431/sample.js -m keep_fnames=true';
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, "function f(r){return function(){function n(n){return n*n}return r(n)}}function g(n){return n(1)+n(2)}console.log(f(g)()==5);\n");
+            done();
+        });
+    });
+    it("Should work with --define (simple)", function (done) {
+        var command = uglifyjscmd + ' test/input/global_defs/simple.js --define D=5 -c';
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, "console.log(5);\n");
+            done();
+        });
+    });
+    it("Should work with --define (nested)", function (done) {
+        var command = uglifyjscmd + ' test/input/global_defs/nested.js --define C.D=5,C.V=3 -c';
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, "console.log(3,5);\n");
+            done();
+        });
+    });
+    it("Should work with --define (AST_Node)", function (done) {
+        var command = uglifyjscmd + ' test/input/global_defs/simple.js --define console.log=stdout.println -c';
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, "stdout.println(D);\n");
+            done();
+        });
+    });
+    it("Should work with `--beautify`", function (done) {
+        var command = uglifyjscmd + ' test/input/issue-1482/input.js -b';
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, read("test/input/issue-1482/default.js"));
+            done();
+        });
+    });
+    it("Should work with `--beautify bracketize`", function (done) {
+        var command = uglifyjscmd + ' test/input/issue-1482/input.js -b bracketize';
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, read("test/input/issue-1482/bracketize.js"));
+            done();
+        });
+    });
+    it("Should process inline source map", function(done) {
+        var command = uglifyjscmd + " test/input/issue-520/input.js -mc toplevel --source-map content=inline,url=inline";
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, read("test/input/issue-520/output.js"));
+            done();
+        });
+    });
+    it("Should warn for missing inline source map", function(done) {
+        var command = uglifyjscmd + " test/input/issue-1323/sample.js --source-map content=inline,url=inline";
+
+        exec(command, function (err, stdout, stderr) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, [
+                "var bar=function(){function foo(bar){return bar}return foo}();",
+                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMTMyMy9zYW1wbGUuanMiXSwibmFtZXMiOlsiYmFyIiwiZm9vIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFJQSxJQUFNLFdBQ04sU0FBU0MsSUFBS0QsS0FDVixPQUFPQSxJQUdYLE9BQU9DLElBTEQifQ==",
+                "",
+            ].join("\n"));
             assert.strictEqual(stderr, "WARN: inline source map not found\n");
             done();
         });
     });
     it("Should fail with multiple input and inline source map", function(done) {
-        var command = uglifyjscmd + ' test/input/issue-520/input.js test/input/issue-520/output.js --in-source-map inline --source-map-inline';
+        var command = uglifyjscmd + " test/input/issue-520/input.js test/input/issue-520/output.js --source-map content=inline,url=inline";
 
         exec(command, function (err, stdout, stderr) {
             assert.ok(err);
-            assert.strictEqual(stderr, "ERROR: Inline source map only works with singular input\n");
+            assert.strictEqual(stderr.split(/\n/)[0], "ERROR: inline source map only works with singular input");
             done();
         });
     });
     it("Should fail with acorn and inline source map", function(done) {
-        var command = uglifyjscmd + ' test/input/issue-520/input.js --in-source-map inline --source-map-inline --acorn';
+        var command = uglifyjscmd + " test/input/issue-520/input.js --source-map content=inline,url=inline -p acorn";
 
         exec(command, function (err, stdout, stderr) {
             assert.ok(err);
-            assert.strictEqual(stderr, "ERROR: Inline source map only works with built-in parser\n");
+            assert.strictEqual(stderr, "ERROR: inline source map only works with built-in parser\n");
             done();
         });
     });
     it("Should fail with SpiderMonkey and inline source map", function(done) {
-        var command = uglifyjscmd + ' test/input/issue-520/input.js --in-source-map inline --source-map-inline --spidermonkey';
+        var command = uglifyjscmd + " test/input/issue-520/input.js --source-map content=inline,url=inline -p spidermonkey";
 
         exec(command, function (err, stdout, stderr) {
             assert.ok(err);
-            assert.strictEqual(stderr, "ERROR: Inline source map only works with built-in parser\n");
+            assert.strictEqual(stderr, "ERROR: inline source map only works with built-in parser\n");
             done();
         });
     });
@@ -208,7 +235,7 @@ describe("bin/uglifyjs", function () {
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/simple.js:1,12");
             assert.strictEqual(lines[1], "function f(a{}");
             assert.strictEqual(lines[2], "            ^");
-            assert.strictEqual(lines[3], "SyntaxError: Unexpected token punc «{», expected punc «,»");
+            assert.strictEqual(lines[3], "ERROR: Unexpected token punc «{», expected punc «,»");
             done();
         });
     });
@@ -221,7 +248,7 @@ describe("bin/uglifyjs", function () {
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/tab.js:1,12");
             assert.strictEqual(lines[1], "\t\tfoo(\txyz, 0abc);");
             assert.strictEqual(lines[2], "\t\t    \t     ^");
-            assert.strictEqual(lines[3], "SyntaxError: Invalid syntax: 0abc");
+            assert.strictEqual(lines[3], "ERROR: Invalid syntax: 0abc");
             done();
         });
     });
@@ -234,7 +261,7 @@ describe("bin/uglifyjs", function () {
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/eof.js:2,0");
             assert.strictEqual(lines[1], "foo, bar(");
             assert.strictEqual(lines[2], "         ^");
-            assert.strictEqual(lines[3], "SyntaxError: Unexpected token: eof (undefined)");
+            assert.strictEqual(lines[3], "ERROR: Unexpected token: eof (undefined)");
             done();
         });
     });
@@ -247,63 +274,380 @@ describe("bin/uglifyjs", function () {
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/loop-no-body.js:2,0");
             assert.strictEqual(lines[1], "for (var i = 0; i < 1; i++) ");
             assert.strictEqual(lines[2], "                            ^");
-            assert.strictEqual(lines[3], "SyntaxError: Unexpected token: eof (undefined)");
+            assert.strictEqual(lines[3], "ERROR: Unexpected token: eof (undefined)");
             done();
         });
     });
-    it("Should support hyphen as shorthand", function(done) {
-       var command = uglifyjscmd + ' test/input/issue-1431/sample.js -m keep-fnames=true';
-
-       exec(command, function (err, stdout) {
-           if (err) throw err;
-
-           assert.strictEqual(stdout, "function f(r){return function(){function n(n){return n*n}return r(n)}}function g(n){return n(1)+n(2)}console.log(f(g)()==5);\n");
-           done();
-       });
-    });
     it("Should throw syntax error (5--)", function(done) {
-       var command = uglifyjscmd + ' test/input/invalid/assign_1.js';
+        var command = uglifyjscmd + ' test/input/invalid/assign_1.js';
 
-       exec(command, function (err, stdout, stderr) {
+        exec(command, function (err, stdout, stderr) {
-           assert.ok(err);
+            assert.ok(err);
-           assert.strictEqual(stdout, "");
+            assert.strictEqual(stdout, "");
-           assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
-               "Parse error at test/input/invalid/assign_1.js:1,18",
+                "Parse error at test/input/invalid/assign_1.js:1,18",
-               "console.log(1 || 5--);",
+                "console.log(1 || 5--);",
-               "                  ^",
+                "                  ^",
-               "SyntaxError: Invalid use of -- operator"
+                "ERROR: Invalid use of -- operator"
-           ].join("\n"));
+            ].join("\n"));
-           done();
+            done();
-       });
+        });
     });
     it("Should throw syntax error (Math.random() /= 2)", function(done) {
-       var command = uglifyjscmd + ' test/input/invalid/assign_2.js';
+        var command = uglifyjscmd + ' test/input/invalid/assign_2.js';
 
-       exec(command, function (err, stdout, stderr) {
+        exec(command, function (err, stdout, stderr) {
-           assert.ok(err);
+            assert.ok(err);
-           assert.strictEqual(stdout, "");
+            assert.strictEqual(stdout, "");
-           assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
-               "Parse error at test/input/invalid/assign_2.js:1,32",
+                "Parse error at test/input/invalid/assign_2.js:1,32",
-               "console.log(2 || (Math.random() /= 2));",
+                "console.log(2 || (Math.random() /= 2));",
-               "                                ^",
+                "                                ^",
-               "SyntaxError: Invalid assignment"
+                "ERROR: Invalid assignment"
-           ].join("\n"));
+            ].join("\n"));
-           done();
+            done();
-       });
+        });
     });
     it("Should throw syntax error (++this)", function(done) {
-       var command = uglifyjscmd + ' test/input/invalid/assign_3.js';
+        var command = uglifyjscmd + ' test/input/invalid/assign_3.js';
 
-       exec(command, function (err, stdout, stderr) {
+        exec(command, function (err, stdout, stderr) {
-           assert.ok(err);
+            assert.ok(err);
-           assert.strictEqual(stdout, "");
+            assert.strictEqual(stdout, "");
-           assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
-               "Parse error at test/input/invalid/assign_3.js:1,18",
+                "Parse error at test/input/invalid/assign_3.js:1,17",
-               "console.log(3 || ++this);",
+                "console.log(3 || ++this);",
-               "                  ^",
+                "                 ^",
-               "SyntaxError: Invalid use of ++ operator"
+                "ERROR: Invalid use of ++ operator"
-           ].join("\n"));
+            ].join("\n"));
-           done();
+            done();
-       });
+        });
+    });
+    it("Should throw syntax error (++null)", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/assign_4.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/assign_4.js:1,0",
+                "++null",
+                "^",
+                "ERROR: Invalid use of ++ operator"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (a.=)", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/dot_1.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/dot_1.js:1,2",
+                "a.=",
+                "  ^",
+                "ERROR: Unexpected token: operator (=)"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (%.a)", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/dot_2.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/dot_2.js:1,0",
+                "%.a;",
+                "^",
+                "ERROR: Unexpected token: operator (%)"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (a./();)", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/dot_3.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/dot_3.js:1,2",
+                "a./();",
+                "  ^",
+                "ERROR: Unexpected token: operator (/)"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error ({%: 1})", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/object.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/object.js:1,13",
+                "console.log({%: 1});",
+                "             ^",
+                "ERROR: Unexpected token: operator (%)"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (delete x)", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/delete.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/delete.js:13,11",
+                "    delete x;",
+                "           ^",
+                "ERROR: Calling delete on expression not allowed in strict mode"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (function g(arguments))", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/function_1.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/function_1.js:4,11",
+                "function g(arguments) {",
+                "           ^",
+                "ERROR: Unexpected arguments in strict mode"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (function eval())", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/function_2.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/function_2.js:4,9",
+                "function eval() {",
+                "         ^",
+                "ERROR: Unexpected eval in strict mode"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (iife arguments())", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/function_3.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/function_3.js:4,10",
+                "!function arguments() {",
+                "          ^",
+                "ERROR: Unexpected arguments in strict mode"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (catch(eval))", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/try.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/try.js:7,18",
+                "    try {} catch (eval) {}",
+                "                  ^",
+                "ERROR: Unexpected eval in strict mode"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (var eval)", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/var.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/var.js:7,8",
+                "    var eval;",
+                "        ^",
+                "ERROR: Unexpected eval in strict mode"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (else)", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/else.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/else.js:1,7",
+                "if (0) else 1;",
+                "       ^",
+                "ERROR: Unexpected token: keyword (else)"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (return)", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/return.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/return.js:1,0",
+                "return 42;",
+                "^",
+                "ERROR: 'return' outside of function"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (for-in init)", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/for-in_1.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/for-in_1.js:2,5",
+                "for (1, 2, a in b) {",
+                "     ^",
+                "ERROR: Invalid left-hand side in for..in loop"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should throw syntax error (for-in var)", function(done) {
+        var command = uglifyjscmd + ' test/input/invalid/for-in_2.js';
+
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+                "Parse error at test/input/invalid/for-in_2.js:2,5",
+                "for (var a, b in c) {",
+                "     ^",
+                "ERROR: Only one variable declaration allowed in for..in loop"
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should handle literal string as source map input", function(done) {
+        var command = [
+            uglifyjscmd,
+            "test/input/issue-1236/simple.js",
+            "--source-map",
+            'content="' + read_map() + '",url=inline'
+        ].join(" ");
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, [
+                '"use strict";var foo=function foo(x){return"foo "+x};console.log(foo("bar"));',
+                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbImluZGV4LmpzIl0sIm5hbWVzIjpbImZvbyIsIngiLCJjb25zb2xlIiwibG9nIl0sIm1hcHBpbmdzIjoiYUFBQSxJQUFJQSxJQUFNLFNBQU5BLElBQU1DLEdBQUEsTUFBSyxPQUFTQSxHQUN4QkMsUUFBUUMsSUFBSUgsSUFBSSJ9",
+                ""
+            ].join("\n"));
+            done();
+        });
+
+        function read_map() {
+            var map = JSON.parse(read("./test/input/issue-1236/simple.js.map"));
+            delete map.sourcesContent;
+            return JSON.stringify(map).replace(/"/g, '\\"');
+        }
+    });
+    it("Should include function calls in source map", function(done) {
+        var command = [
+            uglifyjscmd,
+            "test/input/issue-2310/input.js",
+            "-c",
+            "--source-map", "url=inline",
+        ].join(" ");
+
+        exec(command, function(err, stdout, stderr) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, [
+                'function foo(){return function(){console.log("PASS")}}foo()();',
+                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMjMxMC9pbnB1dC5qcyJdLCJuYW1lcyI6WyJmb28iLCJjb25zb2xlIiwibG9nIiwiZiJdLCJtYXBwaW5ncyI6IkFBQUEsU0FBU0EsTUFDTCxPQUFPLFdBQ0hDLFFBQVFDLElBQUksU0FLUkYsS0FDUkcifQ==",
+                ""
+            ].join("\n"));
+            done();
+        });
+    });
+    it("Should dump AST as JSON", function(done) {
+        var command = uglifyjscmd + " test/input/global_defs/simple.js -mco ast";
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            var ast = JSON.parse(stdout);
+            assert.strictEqual(ast._class, "AST_Toplevel");
+            assert.ok(Array.isArray(ast.body));
+            done();
+        });
+    });
+    it("Should print supported options on invalid option syntax", function(done) {
+        var command = uglifyjscmd + " test/input/comments/filter.js -b ascii-only";
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.ok(/^Supported options:\n[\s\S]*?\nERROR: `ascii-only` is not a supported option/.test(stderr), stderr);
+            done();
+        });
+    });
+    it("Should work with --mangle reserved=[]", function(done) {
+        var command = uglifyjscmd + " test/input/issue-505/input.js -m reserved=[callback]";
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, 'function test(callback){"aaaaaaaaaaaaaaaa";callback(err,data);callback(err,data)}\n');
+            done();
+        });
+    });
+    it("Should work with --mangle reserved=false", function(done) {
+        var command = uglifyjscmd + " test/input/issue-505/input.js -m reserved=false";
+
+        exec(command, function (err, stdout) {
+            if (err) throw err;
+
+            assert.strictEqual(stdout, 'function test(a){"aaaaaaaaaaaaaaaa";a(err,data);a(err,data)}\n');
+            done();
+        });
+    });
+    it("Should fail with --mangle-props reserved=[in]", function(done) {
+        var command = uglifyjscmd + " test/input/issue-505/input.js --mangle-props reserved=[in]";
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.ok(/^Supported options:\n[\s\S]*?\nERROR: `reserved=\[in]` is not a supported option/.test(stderr), stderr);
+            done();
+        });
+    });
+    it("Should fail with --define a-b", function(done) {
+        var command = uglifyjscmd + " test/input/issue-505/input.js --define a-b";
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.strictEqual(stderr, "Error parsing arguments for 'define': a-b\n");
+            done();
+        });
     });
 });

test/mocha/comment-filter.js

@@ -1,4 +1,4 @@
-var UglifyJS = require('../../');
+var UglifyJS = require("../node");
 var assert = require("assert");
 
 describe("comment filters", function() {
@@ -75,9 +75,15 @@ describe("comment filters", function() {
 
     it("Should handle shebang and preamble correctly", function() {
         var code = UglifyJS.minify("#!/usr/bin/node\nvar x = 10;", {
-            fromString: true,
             output: { preamble: "/* Build */" }
         }).code;
         assert.strictEqual(code, "#!/usr/bin/node\n/* Build */\nvar x=10;");
-    })
+    });
+
+    it("Should handle preamble without shebang correctly", function() {
+        var code = UglifyJS.minify("var x = 10;", {
+            output: { preamble: "/* Build */" }
+        }).code;
+        assert.strictEqual(code, "/* Build */\nvar x=10;");
+    });
 });