v2.8.26

Account for comments when detecting property access in `tokenizer`.

fixes #1943

.github/ISSUE_TEMPLATE.md

@@ -1,29 +1,9 @@
-**Bug report or feature request?** 
-
-<!-- Note: sub-optimal but correct code is not a bug -->
-
-**ES5 or ES6+ input?** 
-
-<!-- Note: for ES6 see: https://github.com/mishoo/UglifyJS2/tree/harmony#harmony -->
-
-**Uglify version (`uglifyjs -V`)**
-
-**JavaScript input**
-
+- Bug report or feature request? <!-- Note: sub-optimal but correct code is not a bug -->
+- `uglify-js` version (`uglifyjs -V`)
+- JavaScript input - ideally as small as possible.
+- The `uglifyjs` CLI command executed or `minify()` options used.
+- An example of JavaScript output produced and/or the error or warning.
 <!--
-    A complete parsable JS program exhibiting the issue with
-    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`.
+    Note: the release version of uglify-js only supports ES5. Those wishing
+    to minify ES6 should use the experimental harmony branch.
 -->

.travis.yml

@@ -1,14 +1,12 @@
 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

@@ -0,0 +1,77 @@
+#! /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;
+    }
+}

lib/ast.js

@@ -87,7 +87,7 @@ function DEFNODE(type, props, methods, base) {
     return ctor;
 };
 
-var AST_Token = DEFNODE("Token", "type value line col pos endline endcol endpos nlb comments_before comments_after file raw", {
+var AST_Token = DEFNODE("Token", "type value line col pos endline endcol endpos nlb comments_before file raw", {
 }, null);
 
 var AST_Node = DEFNODE("Node", "start end", {
@@ -134,10 +134,11 @@ var AST_Debugger = DEFNODE("Debugger", null, {
     $documentation: "Represents a debugger statement",
 }, AST_Statement);
 
-var AST_Directive = DEFNODE("Directive", "value quote", {
+var AST_Directive = DEFNODE("Directive", "value scope 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);
@@ -181,13 +182,21 @@ 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);
 
@@ -298,9 +307,10 @@ var AST_With = DEFNODE("With", "expression", {
 
 /* -----[ scope and functions ]----- */
 
-var AST_Scope = DEFNODE("Scope", "variables functions uses_with uses_eval parent_scope enclosed cname", {
+var AST_Scope = DEFNODE("Scope", "directives 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",
@@ -316,13 +326,62 @@ var AST_Toplevel = DEFNODE("Toplevel", "globals", {
     $propdoc: {
         globals: "[Object/S] a map of name -> SymbolDef for all undeclared names",
     },
-    wrap_commonjs: function(name) {
-        var body = this.body;
-        var wrapped_tl = "(function(exports){'$ORIG';})(typeof " + name + "=='undefined'?(" + name + "={}):" + name + ");";
+    wrap_enclose: function(arg_parameter_pairs) {
+        var self = this;
+        var args = [];
+        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(body);
+                return MAP.splice(self.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;
@@ -352,11 +411,11 @@ var AST_Accessor = DEFNODE("Accessor", null, {
     $documentation: "A setter/getter function.  The `name` property is always null."
 }, AST_Lambda);
 
-var AST_Function = DEFNODE("Function", "inlined", {
+var AST_Function = DEFNODE("Function", null, {
     $documentation: "A function expression"
 }, AST_Lambda);
 
-var AST_Defun = DEFNODE("Defun", "inlined", {
+var AST_Defun = DEFNODE("Defun", null, {
     $documentation: "A function definition"
 }, AST_Lambda);
 
@@ -493,10 +552,10 @@ var AST_Finally = DEFNODE("Finally", null, {
     $documentation: "A `finally` node; only makes sense as part of a `try` statement"
 }, AST_Block);
 
-/* -----[ VAR ]----- */
+/* -----[ VAR/CONST ]----- */
 
 var AST_Definitions = DEFNODE("Definitions", "definitions", {
-    $documentation: "Base class for `var` nodes (variable declarations/initializations)",
+    $documentation: "Base class for `var` or `const` nodes (variable declarations/initializations)",
     $propdoc: {
         definitions: "[AST_VarDef*] array of variable definitions"
     },
@@ -514,10 +573,14 @@ 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] name of the variable",
+        name: "[AST_SymbolVar|AST_SymbolConst] name of the variable",
         value: "[AST_Node?] initializer, or null of there's no initializer"
     },
     _walk: function(visitor) {
@@ -538,11 +601,11 @@ 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);
         });
     }
 });
@@ -551,16 +614,68 @@ 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_Sequence = DEFNODE("Sequence", "expressions", {
-    $documentation: "A sequence expression (comma-separated expressions)",
+var AST_Seq = DEFNODE("Seq", "car cdr", {
+    $documentation: "A sequence expression (two comma-separated expressions)",
     $propdoc: {
-        expressions: "[AST_Node*] array of expressions (at least two)"
+        car: "[AST_Node] first element in sequence",
+        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.expressions.forEach(function(node) {
-                node._walk(visitor);
-            });
+            this.car._walk(visitor);
+            if (this.cdr) this.cdr._walk(visitor);
         });
     }
 });
@@ -613,7 +728,7 @@ var AST_UnaryPostfix = DEFNODE("UnaryPostfix", null, {
     $documentation: "Unary postfix expression, i.e. `i++`"
 }, AST_Unary);
 
-var AST_Binary = DEFNODE("Binary", "operator left right", {
+var AST_Binary = DEFNODE("Binary", "left operator right", {
     $documentation: "Binary expression, i.e. `a + b`",
     $propdoc: {
         left: "[AST_Node] left-hand side expression",
@@ -722,13 +837,17 @@ var AST_SymbolAccessor = DEFNODE("SymbolAccessor", null, {
 }, AST_Symbol);
 
 var AST_SymbolDeclaration = DEFNODE("SymbolDeclaration", "init", {
-    $documentation: "A declaration symbol (symbol in var, function name or argument, symbol in catch)",
+    $documentation: "A declaration symbol (symbol in var/const, 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);
@@ -857,13 +976,13 @@ TreeWalker.prototype = {
         if (!ret && descend) {
             descend.call(node);
         }
-        this.pop();
+        this.pop(node);
         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]) {
@@ -871,8 +990,9 @@ TreeWalker.prototype = {
         }
         this.stack.push(node);
     },
-    pop: function() {
-        if (this.stack.pop() instanceof AST_Lambda) {
+    pop: function(node) {
+        this.stack.pop();
+        if (node instanceof AST_Lambda) {
             this.directives = Object.getPrototypeOf(this.directives);
         }
     },
@@ -898,6 +1018,24 @@ TreeWalker.prototype = {
             }
         }
     },
+    in_boolean_context: function() {
+        var stack = this.stack;
+        var i = stack.length, self = stack[--i];
+        while (i > 0) {
+            var p = stack[--i];
+            if ((p instanceof AST_If           && p.condition === self) ||
+                (p instanceof AST_Conditional  && p.condition === self) ||
+                (p instanceof AST_DWLoop       && p.condition === self) ||
+                (p instanceof AST_For          && p.condition === self) ||
+                (p instanceof AST_UnaryPrefix  && p.operator == "!" && p.expression === self))
+            {
+                return true;
+            }
+            if (!(p instanceof AST_Binary && (p.operator == "&&" || p.operator == "||")))
+                return false;
+            self = p;
+        }
+    },
     loopcontrol_target: function(node) {
         var stack = this.stack;
         if (node.label) for (var i = stack.length; --i >= 0;) {

lib/minify.js

@@ -1,228 +0,0 @@
-"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: {},
-            rename: undefined,
-            sourceMap: false,
-            timings: false,
-            toplevel: false,
-            warnings: false,
-            wrap: false,
-        }, true);
-        var timings = options.timings && {
-            start: Date.now()
-        };
-        if (options.rename === undefined) {
-            options.rename = options.compress && options.mangle;
-        }
-        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.rename = Date.now();
-        if (options.rename) {
-            toplevel.figure_out_scope(options.mangle);
-            toplevel.expand_names(options.mangle);
-        }
-        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.rename - timings.parse),
-                rename: 1e-3 * (timings.compress - timings.rename),
-                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

@@ -145,11 +145,7 @@
             });
         },
         SequenceExpression: function(M) {
-            return new AST_Sequence({
-                start      : my_start_token(M),
-                end        : my_end_token(M),
-                expressions: M.expressions.map(from_moz)
-            });
+            return AST_Seq.from_array(M.expressions.map(from_moz));
         },
         MemberExpression: function(M) {
             return new (M.computed ? AST_Sub : AST_Dot)({
@@ -168,7 +164,7 @@
             });
         },
         VariableDeclaration: function(M) {
-            return new AST_Var({
+            return new (M.kind === "const" ? AST_Const : AST_Var)({
                 start       : my_start_token(M),
                 end         : my_end_token(M),
                 definitions : M.declarations.map(from_moz)
@@ -204,7 +200,7 @@
         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 ? AST_SymbolVar
+                        : p.type == "VariableDeclarator" && p.id === M ? (p.kind == "const" ? AST_SymbolConst : 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
@@ -324,15 +320,15 @@
     def_to_moz(AST_Definitions, function To_Moz_VariableDeclaration(M) {
         return {
             type: "VariableDeclaration",
-            kind: "var",
+            kind: M instanceof AST_Const ? "const" : "var",
             declarations: M.definitions.map(to_moz)
         };
     });
 
-    def_to_moz(AST_Sequence, function To_Moz_SequenceExpression(M) {
+    def_to_moz(AST_Seq, function To_Moz_SequenceExpression(M) {
         return {
             type: "SequenceExpression",
-            expressions: M.expressions.map(to_moz)
+            expressions: M.to_array().map(to_moz)
         };
     });
 

lib/output.js

@@ -52,13 +52,11 @@ function is_some_comments(comment) {
 
 function OutputStream(options) {
 
-    var readonly = !options;
     options = defaults(options, {
         ascii_only       : false,
         beautify         : false,
         bracketize       : false,
         comments         : false,
-        ie8              : false,
         indent_level     : 4,
         indent_start     : 0,
         inline_script    : true,
@@ -68,10 +66,12 @@ function OutputStream(options) {
         preserve_line    : false,
         quote_keys       : false,
         quote_style      : 0,
+        screw_ie8        : true,
         semicolons       : true,
         shebang          : true,
         source_map       : null,
-        webkit           : false,
+        space_colon      : true,
+        unescape_regexps : false,
         width            : 80,
         wrap_iife        : false,
     }, true);
@@ -110,7 +110,7 @@ function OutputStream(options) {
     var current_pos = 0;
     var OUTPUT = "";
 
-    var to_utf8 = options.ascii_only ? function(str, identifier) {
+    function to_ascii(str, identifier) {
         return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function(ch) {
             var code = ch.charCodeAt(0).toString(16);
             if (code.length <= 2 && !identifier) {
@@ -121,17 +121,6 @@ function OutputStream(options) {
                 return "\\u" + code;
             }
         });
-    } : function(str) {
-        var s = "";
-        for (var i = 0, len = str.length; i < len; i++) {
-            if (is_surrogate_pair_head(str[i]) && !is_surrogate_pair_tail(str[i + 1])
-                || is_surrogate_pair_tail(str[i]) && !is_surrogate_pair_head(str[i - 1])) {
-                s += "\\u" + str.charCodeAt(i).toString(16);
-            } else {
-                s += str[i];
-            }
-        }
-        return s;
     };
 
     function make_string(str, quote) {
@@ -147,12 +136,12 @@ function OutputStream(options) {
               case "\t": return "\\t";
               case "\b": return "\\b";
               case "\f": return "\\f";
-              case "\x0B": return options.ie8 ? "\\x0B" : "\\v";
+              case "\x0B": return options.screw_ie8 ? "\\v" : "\\x0B";
               case "\u2028": return "\\u2028";
               case "\u2029": return "\\u2029";
               case "\ufeff": return "\\ufeff";
               case "\0":
-                  return /[0-9]/.test(str.charAt(i+1)) ? "\\x00" : "\\0";
+                  return /[0-7]/.test(str.charAt(i+1)) ? "\\x00" : "\\0";
             }
             return s;
         });
@@ -162,7 +151,7 @@ function OutputStream(options) {
         function quote_double() {
             return '"' + str.replace(/\x22/g, '\\"') + '"';
         }
-        str = to_utf8(str);
+        if (options.ascii_only) str = to_ascii(str);
         switch (options.quote_style) {
           case 1:
             return quote_single();
@@ -187,7 +176,8 @@ function OutputStream(options) {
 
     function make_name(name) {
         name = name.toString();
-        name = to_utf8(name, true);
+        if (options.ascii_only)
+            name = to_ascii(name, true);
         return name;
     };
 
@@ -200,47 +190,13 @@ function OutputStream(options) {
     var might_need_space = false;
     var might_need_semicolon = false;
     var might_add_newline = 0;
-    var need_newline_indented = false;
-    var need_space = false;
-    var newline_insert = -1;
     var last = "";
-    var mapping_token, mapping_name, mappings = options.source_map && [];
-
-    var do_add_mapping = mappings ? function() {
-        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++;
@@ -250,10 +206,7 @@ function OutputStream(options) {
                 AST_Node.warn("Output exceeds {max_line_len} characters", options);
             }
         }
-        if (might_add_newline) {
-            might_add_newline = 0;
-            do_add_mapping();
-        }
+        might_add_newline = 0;
     } : noop;
 
     var requireSemicolonChars = makePredicate("( [ + * / - , .");
@@ -261,20 +214,6 @@ function OutputStream(options) {
     function print(str) {
         str = String(str);
         var ch = str.charAt(0);
-        if (need_newline_indented && ch) {
-            need_newline_indented = false;
-            if (ch != "\n") {
-                print("\n");
-                indent();
-            }
-        }
-        if (need_space && ch) {
-            need_space = false;
-            if (!/[\s;})]/.test(ch)) {
-                space();
-            }
-        }
-        newline_insert = -1;
         var prev = last.charAt(last.length - 1);
         if (might_need_semicolon) {
             might_need_semicolon = false;
@@ -327,18 +266,6 @@ 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;
@@ -373,13 +300,7 @@ function OutputStream(options) {
     } : function(col, cont) { return cont() };
 
     var newline = options.beautify ? function() {
-        if (newline_insert < 0) return print("\n");
-        if (OUTPUT[newline_insert] != "\n") {
-            OUTPUT = OUTPUT.slice(0, newline_insert) + "\n" + OUTPUT.slice(newline_insert);
-            current_pos++;
-            current_line++;
-        }
-        newline_insert++;
+        print("\n");
     } : options.max_line_len ? function() {
         ensure_line_len();
         might_add_newline = OUTPUT.length;
@@ -436,12 +357,27 @@ function OutputStream(options) {
 
     function colon() {
         print(":");
-        space();
+        if (options.space_colon) space();
     };
 
-    var add_mapping = mappings ? function(token, name) {
-        mapping_token = token;
-        mapping_name = name;
+    var add_mapping = options.source_map ? function(token, name) {
+        try {
+            if (token) options.source_map.add(
+                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() {
@@ -451,116 +387,6 @@ function OutputStream(options) {
         return OUTPUT;
     };
 
-    function prepend_comments(node) {
-        var self = this;
-        var start = node.start;
-        if (!(start.comments_before && start.comments_before._dumped === self)) {
-            var comments = start.comments_before;
-            if (!comments) {
-                comments = start.comments_before = [];
-            }
-            comments._dumped = self;
-
-            if (node instanceof AST_Exit && node.value) {
-                var tw = new TreeWalker(function(node) {
-                    var parent = tw.parent();
-                    if (parent instanceof AST_Exit
-                        || parent instanceof AST_Binary && parent.left === node
-                        || parent.TYPE == "Call" && parent.expression === node
-                        || parent instanceof AST_Conditional && parent.condition === node
-                        || parent instanceof AST_Dot && parent.expression === node
-                        || parent instanceof AST_Sequence && parent.expressions[0] === node
-                        || parent instanceof AST_Sub && parent.expression === node
-                        || parent instanceof AST_UnaryPostfix) {
-                        var text = node.start.comments_before;
-                        if (text && text._dumped !== self) {
-                            text._dumped = self;
-                            comments = comments.concat(text);
-                        }
-                    } else {
-                        return true;
-                    }
-                });
-                tw.push(node);
-                node.value.walk(tw);
-            }
-
-            if (current_pos == 0) {
-                if (comments.length > 0 && options.shebang && comments[0].type == "comment5") {
-                    print("#!" + comments.shift().value + "\n");
-                    indent();
-                }
-                var preamble = options.preamble;
-                if (preamble) {
-                    print(preamble.replace(/\r\n?|[\n\u2028\u2029]|\s*$/g, "\n"));
-                }
-            }
-
-            comments = comments.filter(comment_filter, node);
-            if (comments.length == 0) return;
-            var last_nlb = /(^|\n) *$/.test(OUTPUT);
-            comments.forEach(function(c, i) {
-                if (!last_nlb) {
-                    if (c.nlb) {
-                        print("\n");
-                        indent();
-                        last_nlb = true;
-                    } else if (i > 0) {
-                        space();
-                    }
-                }
-                if (/comment[134]/.test(c.type)) {
-                    print("//" + c.value.replace(/[@#]__PURE__/g, ' ') + "\n");
-                    indent();
-                    last_nlb = true;
-                } else if (c.type == "comment2") {
-                    print("/*" + c.value.replace(/[@#]__PURE__/g, ' ') + "*/");
-                    last_nlb = false;
-                }
-            });
-            if (!last_nlb) {
-                if (start.nlb) {
-                    print("\n");
-                    indent();
-                } else {
-                    space();
-                }
-            }
-        }
-    }
-
-    function append_comments(node, tail) {
-        var self = this;
-        var token = node.end;
-        if (!token) return;
-        var comments = token[tail ? "comments_before" : "comments_after"];
-        if (comments && comments._dumped !== self) {
-            comments._dumped = self;
-            var insert = OUTPUT.length;
-            comments.filter(comment_filter, node).forEach(function(c, i) {
-                need_space = false;
-                if (need_newline_indented) {
-                    print("\n");
-                    indent();
-                    need_newline_indented = false;
-                } else if (c.nlb && (i > 0 || !/(^|\n) *$/.test(OUTPUT))) {
-                    print("\n");
-                    indent();
-                } else if (i > 0 || !tail) {
-                    space();
-                }
-                if (/comment[134]/.test(c.type)) {
-                    print("//" + c.value.replace(/[@#]__PURE__/g, ' '));
-                    need_newline_indented = true;
-                } else if (c.type == "comment2") {
-                    print("/*" + c.value.replace(/[@#]__PURE__/g, ' ') + "*/");
-                    need_space = true;
-                }
-            });
-            if (OUTPUT.length > insert) newline_insert = insert;
-        }
-    }
-
     var stack = [];
     return {
         get             : get,
@@ -577,7 +403,7 @@ function OutputStream(options) {
         last            : function() { return last },
         semicolon       : semicolon,
         force_semicolon : force_semicolon,
-        to_utf8         : to_utf8,
+        to_ascii        : to_ascii,
         print_name      : function(name) { print(make_name(name)) },
         print_string    : function(str, quote, escape_directive) {
             var encoded = encode_string(str, quote);
@@ -598,8 +424,7 @@ function OutputStream(options) {
         with_square     : with_square,
         add_mapping     : add_mapping,
         option          : function(opt) { return options[opt] },
-        prepend_comments: readonly ? noop : prepend_comments,
-        append_comments : readonly ? noop : append_comments,
+        comment_filter  : comment_filter,
         line            : function() { return current_line },
         col             : function() { return current_col },
         pos             : function() { return current_pos },
@@ -622,23 +447,18 @@ 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;
-        if (self instanceof AST_Scope) {
-            active_scope = self;
-        }
-        else if (!use_asm && self instanceof AST_Directive && self.value == "use asm") {
-            use_asm = active_scope;
+        var self = this, generator = self._codegen, prev_use_asm = use_asm;
+        if (self instanceof AST_Directive && self.value == "use asm" && stream.parent() instanceof AST_Scope) {
+            use_asm = true;
         }
         function doit() {
-            stream.prepend_comments(self);
+            self.add_comments(stream);
             self.add_source_map(stream);
             generator(self, stream);
-            stream.append_comments(self);
         }
         stream.push_node(self);
         if (force_parens || self.needs_parens(stream)) {
@@ -647,18 +467,84 @@ function OutputStream(options) {
             doit();
         }
         stream.pop_node();
-        if (self === use_asm) {
-            use_asm = null;
+        if (self instanceof AST_Scope) {
+            use_asm = prev_use_asm;
         }
     });
-    AST_Node.DEFMETHOD("_print", AST_Node.prototype.print);
 
     AST_Node.DEFMETHOD("print_to_string", function(options){
         var s = OutputStream(options);
+        if (!options) s._readonly = true;
         this.print(s);
         return s.get();
     });
 
+    /* -----[ comments ]----- */
+
+    AST_Node.DEFMETHOD("add_comments", function(output){
+        if (output._readonly) return;
+        var self = this;
+        var start = self.start;
+        if (start && !start._comments_dumped) {
+            start._comments_dumped = true;
+            var comments = start.comments_before || [];
+
+            // XXX: ugly fix for https://github.com/mishoo/UglifyJS2/issues/112
+            //               and https://github.com/mishoo/UglifyJS2/issues/372
+            if (self instanceof AST_Exit && self.value) {
+                self.value.walk(new TreeWalker(function(node){
+                    if (node.start && node.start.comments_before) {
+                        comments = comments.concat(node.start.comments_before);
+                        node.start.comments_before = [];
+                    }
+                    if (node instanceof AST_Function ||
+                        node instanceof AST_Array ||
+                        node instanceof AST_Object)
+                    {
+                        return true; // don't go inside.
+                    }
+                }));
+            }
+
+            if (output.pos() == 0) {
+                if (comments.length > 0 && output.option("shebang") && comments[0].type == "comment5") {
+                    output.print("#!" + comments.shift().value + "\n");
+                    output.indent();
+                }
+                var preamble = output.option("preamble");
+                if (preamble) {
+                    output.print(preamble.replace(/\r\n?|[\n\u2028\u2029]|\s*$/g, "\n"));
+                }
+            }
+
+            comments = comments.filter(output.comment_filter, self);
+
+            // Keep single line comments after nlb, after nlb
+            if (!output.option("beautify") && comments.length > 0 &&
+                /comment[134]/.test(comments[0].type) &&
+                output.col() !== 0 && comments[0].nlb)
+            {
+                output.print("\n");
+            }
+
+            comments.forEach(function(c){
+                if (/comment[134]/.test(c.type)) {
+                    output.print("//" + c.value + "\n");
+                    output.indent();
+                }
+                else if (c.type == "comment2") {
+                    output.print("/*" + c.value + "*/");
+                    if (start.nlb) {
+                        output.print("\n");
+                        output.indent();
+                    } else {
+                        output.space();
+                    }
+                }
+            });
+        }
+    });
+
     /* -----[ PARENTHESES ]----- */
 
     function PARENS(nodetype, func) {
@@ -682,13 +568,6 @@ 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;
@@ -709,7 +588,7 @@ function OutputStream(options) {
             || p instanceof AST_Call && p.expression === this;
     });
 
-    PARENS(AST_Sequence, function(output){
+    PARENS(AST_Seq, 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)
@@ -755,15 +634,14 @@ function OutputStream(options) {
             // parens around it too, otherwise the call will be
             // interpreted as passing the arguments to the upper New
             // expression.
-            var parens = false;
-            this.walk(new TreeWalker(function(node) {
-                if (parens || node instanceof AST_Scope) return true;
-                if (node instanceof AST_Call) {
-                    parens = true;
-                    return true;
-                }
-            }));
-            return parens;
+            try {
+                this.walk(new TreeWalker(function(node){
+                    if (node instanceof AST_Call) throw p;
+                }));
+            } catch(ex) {
+                if (ex !== p) throw ex;
+                return true;
+            }
         }
     });
 
@@ -799,7 +677,7 @@ 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)
@@ -880,21 +758,14 @@ function OutputStream(options) {
         self.body.print(output);
         output.semicolon();
     });
-    function print_bracketed(self, output, allow_directives) {
-        if (self.body.length > 0) {
-            output.with_block(function() {
-                display_body(self.body, false, output, allow_directives);
-            });
-        } else {
-            output.print("{");
-            output.with_indent(output.next_indent(), function() {
-                output.append_comments(self, true);
-            });
-            output.print("}");
-        }
+    function print_bracketed(body, output, allow_directives) {
+        if (body.length > 0) output.with_block(function(){
+            display_body(body, false, output, allow_directives);
+        });
+        else output.print("{}");
     };
     DEFPRINT(AST_BlockStatement, function(self, output){
-        print_bracketed(self, output);
+        print_bracketed(self.body, output);
     });
     DEFPRINT(AST_EmptyStatement, function(self, output){
         output.semicolon();
@@ -989,7 +860,7 @@ function OutputStream(options) {
             });
         });
         output.space();
-        print_bracketed(self, output, true);
+        print_bracketed(self.body, output, true);
     });
     DEFPRINT(AST_Lambda, function(self, output){
         self._do_print(output);
@@ -1031,7 +902,7 @@ function OutputStream(options) {
     function make_then(self, output) {
         var b = self.body;
         if (output.option("bracketize")
-            || output.option("ie8") && b instanceof AST_Do)
+            || !output.option("screw_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
@@ -1120,7 +991,7 @@ function OutputStream(options) {
     DEFPRINT(AST_Try, function(self, output){
         output.print("try");
         output.space();
-        print_bracketed(self, output);
+        print_bracketed(self.body, output);
         if (self.bcatch) {
             output.space();
             self.bcatch.print(output);
@@ -1137,12 +1008,12 @@ function OutputStream(options) {
             self.argname.print(output);
         });
         output.space();
-        print_bracketed(self, output);
+        print_bracketed(self.body, output);
     });
     DEFPRINT(AST_Finally, function(self, output){
         output.print("finally");
         output.space();
-        print_bracketed(self, output);
+        print_bracketed(self.body, output);
     });
 
     /* -----[ var/const ]----- */
@@ -1162,19 +1033,24 @@ 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) {
-        var parens = false;
-        // need to take some precautions here:
-        //    https://github.com/mishoo/UglifyJS2/issues/60
-        if (noin) node.walk(new TreeWalker(function(node) {
-            if (parens || node instanceof AST_Scope) return true;
-            if (node instanceof AST_Binary && node.operator == "in") {
-                parens = true;
-                return true;
-            }
-        }));
-        node.print(output, parens);
+        if (!noin) node.print(output);
+        else try {
+            // need to take some precautions here:
+            //    https://github.com/mishoo/UglifyJS2/issues/60
+            node.walk(new TreeWalker(function(node){
+                if (node instanceof AST_Binary && node.operator == "in")
+                    throw output;
+            }));
+            node.print(output);
+        } catch(ex) {
+            if (ex !== output) throw ex;
+            node.print(output, true);
+        }
     };
 
     DEFPRINT(AST_VarDef, function(self, output){
@@ -1194,9 +1070,6 @@ 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();
@@ -1210,19 +1083,18 @@ function OutputStream(options) {
         AST_Call.prototype._codegen(self, output);
     });
 
-    AST_Sequence.DEFMETHOD("_do_print", function(output){
-        this.expressions.forEach(function(node, index) {
-            if (index > 0) {
-                output.comma();
-                if (output.should_break()) {
-                    output.newline();
-                    output.indent();
-                }
+    AST_Seq.DEFMETHOD("_do_print", function(output){
+        this.car.print(output);
+        if (this.cdr) {
+            output.comma();
+            if (output.should_break()) {
+                output.newline();
+                output.indent();
             }
-            node.print(output);
-        });
+            this.cdr.print(output);
+        }
     });
-    DEFPRINT(AST_Sequence, function(self, output){
+    DEFPRINT(AST_Seq, function(self, output){
         self._do_print(output);
         // var p = output.parent();
         // if (p instanceof AST_Statement) {
@@ -1236,23 +1108,15 @@ function OutputStream(options) {
     DEFPRINT(AST_Dot, function(self, output){
         var expr = self.expression;
         expr.print(output);
-        var prop = self.property;
-        if (output.option("ie8") && RESERVED_WORDS(prop)) {
-            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(".");
-                }
+        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);
@@ -1343,8 +1207,9 @@ function OutputStream(options) {
         });
         else output.print("{}");
     });
-
-    function print_property_name(key, quote, output) {
+    DEFPRINT(AST_ObjectKeyVal, function(self, output){
+        var key = self.key;
+        var quote = self.quote;
         if (output.option("quote_keys")) {
             output.print_string(key + "");
         } else if ((typeof key == "number"
@@ -1352,7 +1217,7 @@ function OutputStream(options) {
                     && +key + "" == key)
                    && parseFloat(key) >= 0) {
             output.print(make_num(key));
-        } else if (RESERVED_WORDS(key) ? !output.option("ie8") : is_identifier_string(key)) {
+        } else if (RESERVED_WORDS(key) ? output.option("screw_ie8") : is_identifier_string(key)) {
             if (quote && output.option("keep_quoted_props")) {
                 output.print_string(key, quote);
             } else {
@@ -1361,24 +1226,20 @@ 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);
     });
-    AST_ObjectProperty.DEFMETHOD("_print_getter_setter", function(type, output) {
-        output.print(type);
-        output.space();
-        print_property_name(this.key.name, this.quote, output);
-        this.value._do_print(output, true);
-    });
     DEFPRINT(AST_ObjectSetter, function(self, output){
-        self._print_getter_setter("set", output);
+        output.print("set");
+        output.space();
+        self.key.print(output);
+        self.value._do_print(output, true);
     });
     DEFPRINT(AST_ObjectGetter, function(self, output){
-        self._print_getter_setter("get", output);
+        output.print("get");
+        output.space();
+        self.key.print(output);
+        self.value._do_print(output, true);
     });
     DEFPRINT(AST_Symbol, function(self, output){
         var def = self.definition();
@@ -1402,13 +1263,46 @@ 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 regexp = self.getValue();
-        var str = regexp.toString();
-        if (regexp.raw_source) {
-            str = "/" + regexp.raw_source + str.slice(str.lastIndexOf("/"));
+        var str = self.getValue().toString();
+        if (output.option("ascii_only")) {
+            str = output.to_ascii(str);
+        } else if (output.option("unescape_regexps")) {
+            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

@@ -115,6 +115,8 @@ 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
@@ -132,18 +134,6 @@ function is_letter(code) {
         || (code >= 0xaa && UNICODE.letter.test(String.fromCharCode(code)));
 };
 
-function is_surrogate_pair_head(code) {
-    if (typeof code == "string")
-        code = code.charCodeAt(0);
-    return code >= 0xd800 && code <= 0xdbff;
-}
-
-function is_surrogate_pair_tail(code) {
-    if (typeof code == "string")
-        code = code.charCodeAt(0);
-    return code >= 0xdc00 && code <= 0xdfff;
-}
-
 function is_digit(code) {
     return code >= 48 && code <= 57;
 };
@@ -317,7 +307,11 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         }
         if (!is_comment) {
             ret.comments_before = S.comments_before;
-            ret.comments_after = S.comments_before = [];
+            S.comments_before = [];
+            // make note of any newlines in the comments that came before
+            for (var i = 0, len = ret.comments_before.length; i < len; i++) {
+                ret.nlb = ret.nlb || ret.comments_before[i].nlb;
+            }
         }
         S.newline_before = false;
         return new AST_Token(ret);
@@ -483,33 +477,31 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         return name;
     };
 
-    var read_regexp = with_eof_error("Unterminated regular expression", function(source) {
+    var read_regexp = with_eof_error("Unterminated regular expression", function(regexp){
         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) {
-            source += "\\" + ch;
+            regexp += "\\" + ch;
             prev_backslash = false;
         } else if (ch == "[") {
             in_class = true;
-            source += ch;
+            regexp += ch;
         } else if (ch == "]" && in_class) {
             in_class = false;
-            source += ch;
+            regexp += ch;
         } else if (ch == "/" && !in_class) {
             break;
         } else if (ch == "\\") {
             prev_backslash = true;
         } else {
-            source += ch;
+            regexp += ch;
         }
         var mods = read_name();
         try {
-            var regexp = new RegExp(source, mods);
-            regexp.raw_source = source;
-            return token("regexp", regexp);
+          return token("regexp", new RegExp(regexp, mods));
         } catch(e) {
-            parse_error(e.message);
+          parse_error(e.message);
         }
     });
 
@@ -641,7 +633,8 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
     }
 
     next_token.has_directive = function(directive) {
-        return S.directives[directive] > 0;
+        return S.directives[directive] !== undefined &&
+            S.directives[directive] > 0;
     }
 
     return next_token;
@@ -690,7 +683,9 @@ var PRECEDENCE = (function(a, ret){
     {}
 );
 
-var ATOMIC_START_TOKEN = makePredicate([ "atom", "num", "string", "regexp", "name" ]);
+var STATEMENTS_WITH_LABELS = array_to_hash([ "for", "do", "while", "switch" ]);
+
+var ATOMIC_START_TOKEN = array_to_hash([ "atom", "num", "string", "regexp", "name" ]);
 
 /* -----[ Parser ]----- */
 
@@ -698,13 +693,14 @@ function parse($TEXT, options) {
 
     options = defaults(options, {
         bare_returns   : false,
+        cli            : false,
         expression     : false,
         filename       : null,
         html5_comments : true,
         shebang        : true,
         strict         : false,
         toplevel       : null,
-    }, true);
+    });
 
     var S = {
         input         : (typeof $TEXT == "string"
@@ -774,15 +770,10 @@ function parse($TEXT, options) {
 
     function expect(punc) { return expect_token("punc", punc); };
 
-    function has_newline_before(token) {
-        return token.nlb || !all(token.comments_before, function(comment) {
-            return !comment.nlb;
-        });
-    }
-
     function can_insert_semicolon() {
-        return !options.strict
-            && (is("eof") || is("punc", "}") || has_newline_before(S.token));
+        return !options.strict && (
+            S.token.nlb || is("eof") || is("punc", "}")
+        );
     };
 
     function semicolon(optional) {
@@ -822,10 +813,10 @@ function parse($TEXT, options) {
             if (S.in_directives) {
                 var token = peek();
                 if (S.token.raw.indexOf("\\") == -1
-                    && (is_token(token, "punc", ";")
-                        || is_token(token, "punc", "}")
-                        || has_newline_before(token)
-                        || is_token(token, "eof"))) {
+                    && (token.nlb
+                        || is_token(token, "eof")
+                        || is_token(token, "punc", ";")
+                        || is_token(token, "punc", "}"))) {
                     S.input.add_directive(S.token.value);
                 } else {
                     S.in_directives = false;
@@ -932,7 +923,7 @@ function parse($TEXT, options) {
 
               case "throw":
                 next();
-                if (has_newline_before(S.token))
+                if (S.token.nlb)
                     croak("Illegal newline after 'throw'");
                 var value = expression(true);
                 semicolon();
@@ -950,6 +941,12 @@ function parse($TEXT, options) {
                 semicolon();
                 return node;
 
+              case "const":
+                next();
+                var node = const_();
+                semicolon();
+                return node;
+
               case "with":
                 if (S.input.has_directive("use strict")) {
                     croak("Strict mode may not include a with statement");
@@ -1023,12 +1020,8 @@ function parse($TEXT, options) {
                 ? (next(), var_(true))
                 : expression(true, true);
             if (is("operator", "in")) {
-                if (init instanceof AST_Var) {
-                    if (init.definitions.length > 1)
-                        croak("Only one variable declaration allowed in for..in loop", init.start.line, init.start.col, init.start.pos);
-                } else if (!is_assignable(init)) {
-                    croak("Invalid left-hand side in for..in loop", init.start.line, init.start.col, init.start.pos);
-                }
+                if (init instanceof AST_Var && init.definitions.length > 1)
+                    croak("Only one variable declaration allowed in for..in loop");
                 next();
                 return for_in(init);
             }
@@ -1067,35 +1060,30 @@ function parse($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: argnames,
-            body: body
+            argnames: (function(first, a){
+                while (!is("punc", ")")) {
+                    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)
         });
     };
 
@@ -1191,12 +1179,12 @@ function parse($TEXT, options) {
         });
     };
 
-    function vardefs(no_in) {
+    function vardefs(no_in, in_const) {
         var a = [];
         for (;;) {
             a.push(new AST_VarDef({
                 start : S.token,
-                name  : as_symbol(AST_SymbolVar),
+                name  : as_symbol(in_const ? AST_SymbolConst : AST_SymbolVar),
                 value : is("operator", "=") ? (next(), expression(false, no_in)) : null,
                 end   : prev()
             }));
@@ -1210,7 +1198,15 @@ function parse($TEXT, options) {
     var var_ = function(no_in) {
         return new AST_Var({
             start       : prev(),
-            definitions : vardefs(no_in),
+            definitions : vardefs(no_in, false),
+            end         : prev()
+        });
+    };
+
+    var const_ = function() {
+        return new AST_Const({
+            start       : prev(),
+            definitions : vardefs(false, true),
             end         : prev()
         });
     };
@@ -1237,6 +1233,7 @@ function parse($TEXT, options) {
         var tok = S.token, ret;
         switch (tok.type) {
           case "name":
+          case "keyword":
             ret = _make_symbol(AST_SymbolRef);
             break;
           case "num":
@@ -1266,6 +1263,13 @@ function parse($TEXT, options) {
                 break;
             }
             break;
+          case "operator":
+            if (!is_identifier_string(tok.value)) {
+                croak("Invalid getter/setter name: " + tok.value,
+                    tok.line, tok.col, tok.pos);
+            }
+            ret = _make_symbol(AST_SymbolRef);
+            break;
         }
         next();
         return ret;
@@ -1281,26 +1285,9 @@ function parse($TEXT, options) {
               case "(":
                 next();
                 var ex = expression(true);
-                var len = start.comments_before.length;
-                [].unshift.apply(ex.start.comments_before, start.comments_before);
-                start.comments_before = ex.start.comments_before;
-                start.comments_before_length = len;
-                if (len == 0 && start.comments_before.length > 0) {
-                    var comment = start.comments_before[0];
-                    if (!comment.nlb) {
-                        comment.nlb = start.nlb;
-                        start.nlb = false;
-                    }
-                }
-                start.comments_after = ex.start.comments_after;
                 ex.start = start;
+                ex.end = S.token;
                 expect(")");
-                var end = prev();
-                end.comments_before = ex.end.comments_before;
-                [].push.apply(ex.end.comments_after, end.comments_after);
-                end.comments_after = ex.end.comments_after;
-                ex.end = end;
-                if (ex instanceof AST_Call) mark_pure(ex);
                 return subscripts(ex, allow_calls);
               case "[":
                 return subscripts(array_(), allow_calls);
@@ -1316,7 +1303,7 @@ function parse($TEXT, options) {
             func.end = prev();
             return subscripts(func, allow_calls);
         }
-        if (ATOMIC_START_TOKEN(S.token.type)) {
+        if (ATOMIC_START_TOKEN[S.token.type]) {
             return subscripts(as_atom_node(), allow_calls);
         }
         unexpected();
@@ -1430,37 +1417,16 @@ function parse($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;
     };
 
-    function mark_pure(call) {
-        var start = call.start;
-        var comments = start.comments_before;
-        var i = HOP(start, "comments_before_length") ? start.comments_before_length : comments.length;
-        while (--i >= 0) {
-            var comment = comments[i];
-            if (/[@#]__PURE__/.test(comment.value)) {
-                call.pure = comment;
-                break;
-            }
-        }
-    }
-
     var subscripts = function(expr, allow_calls) {
         var start = expr.start;
         if (is("punc", ".")) {
@@ -1485,14 +1451,12 @@ function parse($TEXT, options) {
         }
         if (allow_calls && is("punc", "(")) {
             next();
-            var call = new AST_Call({
+            return subscripts(new AST_Call({
                 start      : start,
                 expression : expr,
                 args       : expr_list(")"),
                 end        : prev()
-            });
-            mark_pure(call);
-            return subscripts(call, true);
+            }), true);
         }
         return expr;
     };
@@ -1508,7 +1472,7 @@ function parse($TEXT, options) {
             return ex;
         }
         var val = expr_atom(allow_calls);
-        while (is("operator") && UNARY_POSTFIX(S.token.value) && !has_newline_before(S.token)) {
+        while (is("operator") && UNARY_POSTFIX(S.token.value) && !S.token.nlb) {
             val = make_unary(AST_UnaryPostfix, S.token, val);
             val.start = start;
             val.end = S.token;
@@ -1519,17 +1483,8 @@ function parse($TEXT, options) {
 
     function make_unary(ctor, token, expr) {
         var op = token.value;
-        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;
-        }
+        if ((op == "++" || op == "--") && !is_assignable(expr))
+            croak("Invalid use of " + op + " operator", token.line, token.col, token.pos);
         return new ctor({ operator: op, expression: expr });
     };
 
@@ -1574,6 +1529,7 @@ function parse($TEXT, options) {
     };
 
     function is_assignable(expr) {
+        if (options.cli) return true;
         return expr instanceof AST_PropAccess || expr instanceof AST_SymbolRef;
     };
 
@@ -1598,18 +1554,17 @@ function parse($TEXT, options) {
 
     var expression = function(commas, no_in) {
         var start = S.token;
-        var exprs = [];
-        while (true) {
-            exprs.push(maybe_assign(no_in));
-            if (!commas || !is("punc", ",")) break;
+        var expr = maybe_assign(no_in);
+        if (commas && is("punc", ",")) {
             next();
-            commas = true;
+            return new AST_Seq({
+                start  : start,
+                car    : expr,
+                cdr    : expression(true, no_in),
+                end    : peek()
+            });
         }
-        return exprs.length == 1 ? exprs[0] : new AST_Sequence({
-            start       : start,
-            expressions : exprs,
-            end         : peek()
-        });
+        return expr;
     };
 
     function in_loop(cont) {

lib/propmangle.js

@@ -43,16 +43,16 @@
 
 "use strict";
 
-function find_builtins(reserved) {
+function find_builtins() {
     // NaN will be included due to Number.NaN
-    [
+    var a = [
         "null",
         "true",
         "false",
         "Infinity",
         "-Infinity",
         "undefined",
-    ].forEach(add);
+    ];
     [ Object, Array, Function, Number,
       String, Boolean, Error, Math,
       Date, RegExp
@@ -63,52 +63,24 @@ function find_builtins(reserved) {
         }
     });
     function add(name) {
-        push_uniq(reserved, name);
+        push_uniq(a, name);
     }
-}
-
-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.tail_node(), 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;
-    }));
+    return a;
 }
 
 function mangle_properties(ast, options) {
     options = defaults(options, {
-        builtins: false,
         cache: null,
         debug: false,
-        keep_quoted: false,
+        ignore_quoted: false,
         only_cache: false,
         regex: null,
         reserved: null,
-    }, true);
+    });
 
     var reserved = options.reserved;
-    if (!Array.isArray(reserved)) reserved = [];
-    if (!options.builtins) find_builtins(reserved);
+    if (reserved == null)
+        reserved = find_builtins();
 
     var cache = options.cache;
     if (cache == null) {
@@ -119,11 +91,12 @@ 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);
@@ -131,11 +104,12 @@ 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);
+            add(node.key, ignore_quoted && node.quote);
         }
         else if (node instanceof AST_ObjectProperty) {
             // setter or getter, since KeyVal is handled above
@@ -145,14 +119,15 @@ function mangle_properties(ast, options) {
             add(node.property);
         }
         else if (node instanceof AST_Sub) {
-            addStrings(node.property, add);
+            addStrings(node.property, ignore_quoted);
         }
     }));
 
     // step 2: transform the tree, renaming properties
     return ast.transform(new TreeTransformer(function(node){
         if (node instanceof AST_ObjectKeyVal) {
-            node.key = mangle(node.key);
+            if (!(ignore_quoted && node.quote))
+                node.key = mangle(node.key);
         }
         else if (node instanceof AST_ObjectProperty) {
             // setter or getter
@@ -161,9 +136,22 @@ function mangle_properties(ast, options) {
         else if (node instanceof AST_Dot) {
             node.property = mangle(node.property);
         }
-        else if (!options.keep_quoted && node instanceof AST_Sub) {
-            node.property = mangleStrings(node.property);
+        else if (node instanceof AST_Sub) {
+            if (!ignore_quoted)
+                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
@@ -179,13 +167,19 @@ function mangle_properties(ast, options) {
     }
 
     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) {
+    function add(name, ignore) {
+        if (ignore) {
+            ignored[name] = true;
+            return;
+        }
+
         if (can_mangle(name))
             push_uniq(names_to_mangle, name);
 
@@ -205,16 +199,19 @@ 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)) {
+                if (can_mangle(debug_mangled) && !(ignore_quoted && debug_mangled in ignored)) {
                     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));
+                } while (!can_mangle(mangled) || (ignore_quoted && mangled in ignored));
             }
 
             cache.props.set(name, mangled);
@@ -222,11 +219,36 @@ 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_Sequence) {
-                var last = node.expressions.length - 1;
-                node.expressions[last] = mangleStrings(node.expressions[last]);
+            if (node instanceof AST_Seq) {
+                node.cdr = mangleStrings(node.cdr);
             }
             else if (node instanceof AST_String) {
                 node.value = mangle(node.value);
@@ -238,4 +260,5 @@ function mangle_properties(ast, options) {
             return node;
         }));
     }
+
 }

lib/scope.js

@@ -43,16 +43,15 @@
 
 "use strict";
 
-function SymbolDef(scope, orig) {
+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;
+    this.index = index;
     this.id = SymbolDef.next_id++;
 };
 
@@ -77,10 +76,10 @@ SymbolDef.prototype = {
         else if (!this.mangled_name && !this.unmangleable(options)) {
             var s = this.scope;
             var sym = this.orig[0];
-            if (options.ie8 && sym instanceof AST_SymbolLambda)
+            if (!options.screw_ie8 && sym instanceof AST_SymbolLambda)
                 s = s.parent_scope;
             var def;
-            if (def = this.redefined()) {
+            if (this.defun && (def = this.defun.variables.get(this.name))) {
                 this.mangled_name = def.mangled_name || def.name;
             } else
                 this.mangled_name = s.next_mangled(options, this);
@@ -88,16 +87,13 @@ 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, {
         cache: null,
-        ie8: false,
+        screw_ie8: true,
     });
 
     // pass 1: setup scope chaining and handle definitions
@@ -160,7 +156,8 @@ 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);
@@ -187,8 +184,16 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
     self.walk(tw);
 
     // pass 2: find back references and eval
-    self.globals = new Dictionary();
+    var func = null;
+    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;
@@ -201,30 +206,21 @@ 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.ie8) {
+    if (!options.screw_ie8) {
         self.walk(new TreeWalker(function(node, descend) {
             if (node instanceof AST_SymbolCatch) {
                 var name = node.name;
@@ -236,7 +232,6 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
                     ref.reference(options);
                 });
                 node.thedef = def;
-                node.reference(options);
                 return true;
             }
         }));
@@ -252,7 +247,7 @@ AST_Toplevel.DEFMETHOD("def_global", function(node){
     if (globals.has(name)) {
         return globals.get(name);
     } else {
-        var g = new SymbolDef(this, node);
+        var g = new SymbolDef(this, globals.size(), node);
         g.undeclared = true;
         g.global = true;
         globals.set(name, g);
@@ -273,7 +268,7 @@ 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_SymbolFunarg({
+    this.def_variable(new AST_SymbolVar({
         name: "arguments",
         start: this.start,
         end: this.end
@@ -313,7 +308,7 @@ AST_Scope.DEFMETHOD("def_function", function(symbol){
 AST_Scope.DEFMETHOD("def_variable", function(symbol){
     var def;
     if (!this.variables.has(symbol.name)) {
-        def = new SymbolDef(this, symbol);
+        def = new SymbolDef(this, this.variables.size(), symbol);
         this.variables.set(symbol.name, def);
         def.global = !this.parent_scope;
     } else {
@@ -330,8 +325,8 @@ 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 reserved from mangling.
-        if (member(m, options.reserved)) continue;
+        // shadow a name excepted from mangling.
+        if (options.except.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
@@ -363,18 +358,31 @@ AST_Function.DEFMETHOD("next_mangled", function(options, def){
 });
 
 AST_Symbol.DEFMETHOD("unmangleable", function(options){
-    var def = this.definition();
-    return !def || def.unmangleable(options);
+    return this.definition().unmangleable(options);
 });
 
 // labels are always mangleable
-AST_Label.DEFMETHOD("unmangleable", return_false);
+AST_Label.DEFMETHOD("unmangleable", function(){
+    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;
 });
@@ -383,23 +391,23 @@ AST_Symbol.DEFMETHOD("global", function(){
     return this.definition().global;
 });
 
-AST_Toplevel.DEFMETHOD("_default_mangler_options", function(options) {
-    options = defaults(options, {
+AST_Toplevel.DEFMETHOD("_default_mangler_options", function(options){
+    return defaults(options, {
         eval        : false,
-        ie8         : false,
+        except      : [],
         keep_fnames : false,
-        reserved    : [],
+        screw_ie8   : true,
+        sort        : false, // Ignored. Flag retained for backwards compatibility.
         toplevel    : false,
     });
-    if (!Array.isArray(options.reserved)) options.reserved = [];
-    // Never mangle arguments
-    push_uniq(options.reserved, "arguments");
-    return options;
 });
 
 AST_Toplevel.DEFMETHOD("mangle_names", function(options){
     options = this._default_mangler_options(options);
 
+    // Never mangle arguments
+    options.except.push('arguments');
+
     // We only need to mangle declaration nodes.  Special logic wired
     // into the code generator will display the mangled name if it's
     // present (and for AST_SymbolRef-s it'll use the mangled name of
@@ -408,7 +416,11 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
     var to_mangle = [];
 
     if (options.cache) {
-        this.globals.each(collect);
+        this.globals.each(function(symbol){
+            if (options.except.indexOf(symbol.name) < 0) {
+                to_mangle.push(symbol);
+            }
+        });
     }
 
     var tw = new TreeWalker(function(node, descend){
@@ -420,7 +432,13 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
             return true;        // don't descend again in TreeWalker
         }
         if (node instanceof AST_Scope) {
-            node.variables.each(collect);
+            var p = tw.parent(), a = [];
+            node.variables.each(function(symbol){
+                if (options.except.indexOf(symbol.name) < 0) {
+                    a.push(symbol);
+                }
+            });
+            to_mangle.push.apply(to_mangle, a);
             return;
         }
         if (node instanceof AST_Label) {
@@ -429,7 +447,7 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
             node.mangled_name = name;
             return true;
         }
-        if (!options.ie8 && node instanceof AST_SymbolCatch) {
+        if (options.screw_ie8 && node instanceof AST_SymbolCatch) {
             to_mangle.push(node.definition());
             return;
         }
@@ -440,146 +458,109 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
     if (options.cache) {
         options.cache.cname = this.cname;
     }
-
-    function collect(symbol) {
-        if (!member(symbol.name, options.reserved)) {
-            to_mangle.push(symbol);
-        }
-    }
-});
-
-AST_Toplevel.DEFMETHOD("find_unique_prefix", function(options) {
-    var letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_";
-    var cache = options.cache && options.cache.props;
-    var prefixes = Object.create(null);
-    options.reserved.forEach(add_prefix);
-    this.globals.each(add_def);
-    this.walk(new TreeWalker(function(node) {
-        if (node instanceof AST_Scope) node.variables.each(add_def);
-        if (node instanceof AST_SymbolCatch) add_def(node.definition());
-    }));
-    var prefix, i = 0;
-    do {
-        prefix = create_name(i++);
-    } while (prefixes[prefix]);
-    return prefix;
-
-    function add_prefix(name) {
-        if (/[0-9]$/.test(name)) {
-            prefixes[name.replace(/[0-9]+$/, "")] = true;
-        }
-    }
-
-    function add_def(def) {
-        var name = def.name;
-        if (def.global && cache && cache.has(name)) name = cache.get(name);
-        else if (!def.unmangleable(options)) return;
-        add_prefix(name);
-    }
-
-    function create_name(num) {
-        var name = "";
-        do {
-            name += letters[num % letters.length];
-            num = Math.floor(num / letters.length);
-        } while (num);
-        return name;
-    }
-});
-
-AST_Toplevel.DEFMETHOD("expand_names", function(options) {
-    options = this._default_mangler_options(options);
-    var prefix = this.find_unique_prefix(options);
-    this.globals.each(rename);
-    this.walk(new TreeWalker(function(node) {
-        if (node instanceof AST_Scope) node.variables.each(rename);
-        if (node instanceof AST_SymbolCatch) rename(node.definition());
-    }));
-
-    function rename(def) {
-        if (def.global || def.unmangleable(options)) return;
-        if (member(def.name, options.reserved)) return;
-        var d = def.redefined();
-        def.name = d ? d.name : prefix + def.id;
-        def.orig.forEach(function(sym) {
-            sym.name = def.name;
-        });
-        def.references.forEach(function(sym) {
-            sym.name = def.name;
-        });
-    }
-});
-
-AST_Node.DEFMETHOD("tail_node", return_this);
-AST_Sequence.DEFMETHOD("tail_node", function() {
-    return this.expressions[this.expressions.length - 1];
 });
 
 AST_Toplevel.DEFMETHOD("compute_char_frequency", function(options){
     options = this._default_mangler_options(options);
-    try {
-        AST_Node.prototype.print = function(stream, force_parens) {
-            this._print(stream, force_parens);
-            if (this instanceof AST_Symbol && !this.unmangleable(options)) {
-                base54.consider(this.name, -1);
-            } else if (options.properties) {
-                if (this instanceof AST_Dot) {
-                    base54.consider(this.property, -1);
-                } else if (this instanceof AST_Sub) {
-                    skip_string(this.property);
-                }
-            }
-        };
-        base54.consider(this.print_to_string(), 1);
-    } finally {
-        AST_Node.prototype.print = AST_Node.prototype._print;
-    }
-    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.tail_node());
+    var tw = new TreeWalker(function(node){
+        if (node instanceof AST_Constant)
+            base54.consider(node.print_to_string());
+        else if (node instanceof AST_Return)
+            base54.consider("return");
+        else if (node instanceof AST_Throw)
+            base54.consider("throw");
+        else if (node instanceof AST_Continue)
+            base54.consider("continue");
+        else if (node instanceof AST_Break)
+            base54.consider("break");
+        else if (node instanceof AST_Debugger)
+            base54.consider("debugger");
+        else if (node instanceof AST_Directive)
+            base54.consider(node.value);
+        else if (node instanceof AST_While)
+            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();
 });
 
 var base54 = (function() {
-    var leading = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_".split("");
-    var digits = "0123456789".split("");
+    var string = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_0123456789";
     var chars, frequency;
     function reset() {
         frequency = Object.create(null);
-        leading.forEach(function(ch) {
-            frequency[ch] = 0;
-        });
-        digits.forEach(function(ch) {
-            frequency[ch] = 0;
-        });
+        chars = string.split("").map(function(ch){ return ch.charCodeAt(0) });
+        chars.forEach(function(ch){ frequency[ch] = 0 });
     }
-    base54.consider = function(str, delta) {
+    base54.consider = function(str){
         for (var i = str.length; --i >= 0;) {
-            frequency[str[i]] += delta;
+            var code = str.charCodeAt(i);
+            if (code in frequency) ++frequency[code];
         }
     };
-    function compare(a, b) {
-        return frequency[b] - frequency[a];
-    }
     base54.sort = function() {
-        chars = mergeSort(leading, compare).concat(mergeSort(digits, compare));
+        chars = mergeSort(chars, function(a, b){
+            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 += chars[num % base];
+            ret += String.fromCharCode(chars[num % base]);
             num = Math.floor(num / base);
             base = 64;
         } while (num > 0);
@@ -587,3 +568,89 @@ var base54 = (function() {
     };
     return base54;
 })();
+
+AST_Toplevel.DEFMETHOD("scope_warnings", function(options){
+    options = defaults(options, {
+        assign_to_global : true,
+        eval             : true,
+        func_arguments   : true,
+        nested_defuns    : true,
+        undeclared       : false, // this makes a lot of noise
+        unreferenced     : 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

@@ -60,14 +60,17 @@ TreeTransformer.prototype = new TreeWalker;
             tw.push(this);
             if (tw.before) x = tw.before(this, descend, in_list);
             if (x === undefined) {
-                x = this;
-                descend(x, tw);
-                if (tw.after) {
+                if (!tw.after) {
+                    x = this;
+                    descend(x, tw);
+                } else {
+                    tw.stack[tw.stack.length - 1] = x = this;
+                    descend(x, tw);
                     y = tw.after(x, in_list);
                     if (y !== undefined) x = y;
                 }
             }
-            tw.pop();
+            tw.pop(this);
             return x;
         });
     };
@@ -171,8 +174,9 @@ TreeTransformer.prototype = new TreeWalker;
         self.args = do_list(self.args, tw);
     });
 
-    _(AST_Sequence, function(self, tw){
-        self.expressions = do_list(self.expressions, tw);
+    _(AST_Seq, function(self, tw){
+        self.car = self.car.transform(tw);
+        self.cdr = self.cdr.transform(tw);
     });
 
     _(AST_Dot, function(self, tw){

lib/utils.js

@@ -43,6 +43,17 @@
 
 "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);
+};
+
 function characters(str) {
     return str.split("");
 };
@@ -210,6 +221,18 @@ function mergeSort(array, cmp) {
     return _ms(array);
 };
 
+function set_difference(a, b) {
+    return a.filter(function(el){
+        return b.indexOf(el) < 0;
+    });
+};
+
+function set_intersection(a, b) {
+    return a.filter(function(el){
+        return b.indexOf(el) >= 0;
+    });
+};
+
 // this function is taken from Acorn [1], written by Marijn Haverbeke
 // [1] https://github.com/marijnh/acorn
 function makePredicate(words) {
@@ -323,8 +346,8 @@ 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_Sequence      && p.expressions[0] === node) ||
-            (p.TYPE == "Call"               && p.expression === node ) ||
+        if ((p instanceof AST_Seq           && p.car === 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 ) ||
             (p instanceof AST_Conditional   && p.condition === 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": "3.3.2",
+  "version": "2.8.26",
   "engines": {
     "node": ">=0.8.0"
   },
@@ -29,16 +29,23 @@
     "LICENSE"
   ],
   "dependencies": {
-    "commander": "~2.12.1",
-    "source-map": "~0.6.1"
+    "source-map": "~0.5.1",
+    "yargs": "~3.10.0"
   },
   "devDependencies": {
-    "acorn": "~5.2.1",
-    "mocha": "~3.5.1",
-    "semver": "~5.4.1"
+    "acorn": "~5.0.3",
+    "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", "es5"]
+  "keywords": ["uglify", "uglify-js", "minify", "minifier"]
 }

test/benchmark.js

@@ -4,14 +4,12 @@
 "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");
+    args.push("-mc", "warnings=false");
 }
-args.push("--timings");
+args.push("--stats");
 var urls = [
     "https://code.jquery.com/jquery-3.2.1.js",
     "https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.6.4/angular.js",
@@ -21,7 +19,6 @@ var urls = [
     "http://builds.emberjs.com/tags/v2.11.0/ember.prod.js",
     "https://cdn.jsdelivr.net/lodash/4.17.4/lodash.js",
     "https://cdnjs.cloudflare.com/ajax/libs/d3/4.5.0/d3.js",
-    "https://raw.githubusercontent.com/kangax/html-minifier/v3.5.7/dist/htmlminifier.js",
 ];
 var results = {};
 var remaining = 2 * urls.length;
@@ -33,9 +30,13 @@ 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);
@@ -54,21 +55,15 @@ urls.forEach(function(url) {
     results[url] = {
         input: 0,
         output: 0,
-        gzip: 0,
         log: ""
     };
-    fetch(url, function(err, res) {
-        if (err) throw err;
+    require(url.slice(0, url.indexOf(":"))).get(url, function(res) {
         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

@@ -0,0 +1,67 @@
+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

@@ -128,114 +128,50 @@ constant_join_3: {
 
 for_loop: {
     options = {
-        evaluate: true,
-        reduce_funcs: true,
-        reduce_vars: true,
-        unsafe: true,
-        unused: true,
+        unsafe      : true,
+        unused      : true,
+        evaluate    : true,
+        reduce_vars : true
     };
     input: {
         function f0() {
             var a = [1, 2, 3];
-            var b = 0;
-            for (var i = 0; i < a.length; i++)
-                b += a[i];
-            return b;
+            for (var i = 0; i < a.length; i++) {
+                console.log(a[i]);
+            }
         }
+
         function f1() {
             var a = [1, 2, 3];
-            var b = 0;
-            for (var i = 0, len = a.length; i < len; i++)
-                b += a[i];
-            return b;
+            for (var i = 0, len = a.length; i < len; i++) {
+                console.log(a[i]);
+            }
         }
+
         function f2() {
             var a = [1, 2, 3];
-            for (var i = 0; i < a.length; i++)
+            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;
+                console.log(a[i]);
         }
+
         function f1() {
             var a = [1, 2, 3];
-            var b = 0;
             for (var i = 0; i < 3; i++)
-                b += a[i];
-            return b;
+                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_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,
-        ie8        : false,
+        screw_ie8  : true,
         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\\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\'}'
+    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\'}'
 }
 
 ascii_only_false: {
     options = {}
     beautify = {
         ascii_only : false,
-        ie8        : false,
+        screw_ie8  : true,
         beautify   : false,
     }
     input: {
@@ -31,5 +31,6 @@ ascii_only_false: {
                    "\x20\x21\x22\x23 ... \x7d\x7e\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\'}'
+    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\'}'
 }
+

test/compress/asm.js

@@ -16,6 +16,7 @@ asm_mixed: {
         hoist_vars    : true,
         if_return     : true,
         join_vars     : true,
+        cascade       : true,
         side_effects  : true,
         negate_iife   : true
     };
@@ -103,65 +104,3 @@ 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

@@ -73,42 +73,4 @@ 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\x008\0";
+        var f = "\x00360\08\0";
     }
 }
 

test/compress/conditionals.js

@@ -166,24 +166,22 @@ cond_1: {
         conditionals: true
     };
     input: {
-        function foo(do_something, some_condition) {
-            if (some_condition) {
-                do_something(x);
-            } else {
-                do_something(y);
-            }
-            if (some_condition) {
-                side_effects(x);
-            } else {
-                side_effects(y);
-            }
+        var do_something; // if undeclared it's assumed to have side-effects
+        if (some_condition()) {
+            do_something(x);
+        } else {
+            do_something(y);
+        }
+        if (some_condition()) {
+            side_effects(x);
+        } else {
+            side_effects(y);
         }
     }
     expect: {
-        function foo(do_something, some_condition) {
-            do_something(some_condition ? x : y);
-            some_condition ? side_effects(x) : side_effects(y);
-        }
+        var do_something;
+        do_something(some_condition() ? x : y);
+        some_condition() ? side_effects(x) : side_effects(y);
     }
 }
 
@@ -192,18 +190,16 @@ cond_2: {
         conditionals: true
     };
     input: {
-        function foo(x, FooBar, some_condition) {
-            if (some_condition) {
-                x = new FooBar(1);
-            } else {
-                x = new FooBar(2);
-            }
+        var x, FooBar;
+        if (some_condition()) {
+            x = new FooBar(1);
+        } else {
+            x = new FooBar(2);
         }
     }
     expect: {
-        function foo(x, FooBar, some_condition) {
-            x = new FooBar(some_condition ? 1 : 2);
-        }
+        var x, FooBar;
+        x = new FooBar(some_condition() ? 1 : 2);
     }
 }
 
@@ -609,47 +605,11 @@ cond_8c: {
     }
 }
 
-cond_9: {
-    options = {
-        conditionals: true,
-    }
-    input: {
-        function f(x, y) {
-            g() ? x(1) : x(2);
-            x ? (y || x)() : (y || x)();
-            x ? y(a, b) : y(d, b, c);
-            x ? y(a, b, c) : y(a, b, c);
-            x ? y(a, b, c) : y(a, b, f);
-            x ? y(a, b, c) : y(a, e, c);
-            x ? y(a, b, c) : y(a, e, f);
-            x ? y(a, b, c) : y(d, b, c);
-            x ? y(a, b, c) : y(d, b, f);
-            x ? y(a, b, c) : y(d, e, c);
-            x ? y(a, b, c) : y(d, e, f);
-        }
-    }
-    expect: {
-        function f(x, y) {
-            g() ? x(1) : x(2);
-            x, (y || x)();
-            x ? y(a, b) : y(d, b, c);
-            x, y(a, b, c);
-            y(a, b, x ? c : f);
-            y(a, x ? b : e, c);
-            x ? y(a, b, c) : y(a, e, f);
-            y(x ? a : d, b, c);
-            x ? y(a, b, c) : y(d, b, f);
-            x ? y(a, b, c) : y(d, e, c);
-            x ? y(a, b, c) : y(d, e, f);
-        }
-    }
-}
-
 ternary_boolean_consequent: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, side_effects:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true
     }
     input: {
         function f1() { return a == b ? true : x; }
@@ -677,7 +637,7 @@ ternary_boolean_alternative: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, side_effects:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true
     }
     input: {
         function f1() { return a == b ? x : true; }
@@ -1019,12 +979,12 @@ delete_conditional_1: {
         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);
+        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((NaN, !0));
     }
     expect_stdout: true
 }
@@ -1046,160 +1006,12 @@ delete_conditional_2: {
         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);
+        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((NaN, !0));
     }
     expect_stdout: true
 }
-
-issue_2535_1: {
-    options = {
-        booleans: true,
-        conditionals: true,
-        evaluate: true,
-        passes: 2,
-        side_effects: true,
-    }
-    input: {
-        if (true || x()) y();
-        if (true && x()) y();
-        if (x() || true) y();
-        if (x() && true) y();
-        if (false || x()) y();
-        if (false && x()) y();
-        if (x() || false) y();
-        if (x() && false) y();
-    }
-    expect: {
-        y();
-        x() && y();
-        (x(), 1) && y();
-        x() && y();
-        x() && y();
-        x() && y();
-        (x(), 0) && y();
-    }
-}
-
-issue_2535_2: {
-    options = {
-        booleans: true,
-        conditionals: true,
-        evaluate: true,
-        side_effects: true,
-    }
-    input: {
-        function x() {}
-        function y() {
-            return "foo";
-        }
-        console.log((x() || true) || y());
-        console.log((y() || true) || x());
-        console.log((x() || true) && y());
-        console.log((y() || true) && x());
-        console.log((x() && true) || y());
-        console.log((y() && true) || x());
-        console.log((x() && true) && y());
-        console.log((y() && true) && x());
-        console.log((x() || false) || y());
-        console.log((y() || false) || x());
-        console.log((x() || false) && y());
-        console.log((y() || false) && x());
-        console.log((x() && false) || y());
-        console.log((y() && false) || x());
-        console.log((x() && false) && y());
-        console.log((y() && false) && x());
-    }
-    expect: {
-        function x() {}
-        function y() {
-            return "foo";
-        }
-        console.log(x() || !0);
-        console.log(y() || !0);
-        console.log((x(), y()));
-        console.log((y(), x()));
-        console.log(!!x() || y());
-        console.log(!!y() || x());
-        console.log(x() && y());
-        console.log(y() && x());
-        console.log(x() || y());
-        console.log(y() || x());
-        console.log(!!x() && y());
-        console.log(!!y() && x());
-        console.log((x(), y()));
-        console.log((y(), x()));
-        console.log(x() && !1);
-        console.log(y() && !1);
-    }
-    expect_stdout: [
-        "true",
-        "foo",
-        "foo",
-        "undefined",
-        "foo",
-        "true",
-        "undefined",
-        "undefined",
-        "foo",
-        "foo",
-        "false",
-        "undefined",
-        "foo",
-        "undefined",
-        "undefined",
-        "false",
-    ]
-}
-
-issue_2560: {
-    options = {
-        conditionals: true,
-        inline: true,
-        reduce_funcs: true,
-        reduce_vars: true,
-        toplevel: true,
-        unused: true,
-    }
-    input: {
-        function log(x) {
-            console.log(x);
-        }
-        function foo() {
-            return log;
-        }
-        function bar() {
-            if (x !== (x = foo())) {
-                x(1);
-            } else {
-                x(2);
-            }
-        }
-        var x = function() {
-            console.log("init");
-        };
-        bar();
-        bar();
-    }
-    expect: {
-        function log(x) {
-            console.log(x);
-        }
-        function bar() {
-            x !== (x = log) ? x(1) : x(2);
-        }
-        var x = function() {
-            console.log("init");
-        };
-        bar();
-        bar();
-    }
-    expect_stdout: [
-        "1",
-        "2",
-    ]
-}

test/compress/const.js

@@ -0,0 +1,166 @@
+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 new Error("foo");
+            throw "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.
@@ -46,60 +46,16 @@ dead_code_2_should_warn: {
                 })();
             }
         }
-        f();
     }
     expect: {
         function f() {
             g();
             x = 10;
-            throw new Error("foo");
+            throw "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: {
@@ -122,55 +78,141 @@ dead_code_constant_boolean_should_warn_more: {
             foo();
             var moo;
         }
-        bar();
     }
     expect: {
         var foo;
         function bar() {}
         // nothing for the while
         // as for the for, it should keep:
-        var moo;
         var x = 10, y;
-        bar();
+        var moo;
     }
     expect_stdout: true
-    node_version: "<=4"
 }
 
-dead_code_constant_boolean_should_warn_more_strict: {
+dead_code_const_declaration: {
     options = {
         dead_code    : true,
         loops        : true,
         booleans     : true,
         conditionals : true,
         evaluate     : true,
-        side_effects : true,
+        reduce_vars  : true,
     };
     input: {
-        "use strict";
-        while (!((foo && bar) || (x + "0"))) {
+        var unused;
+        const CONST_FOO = false;
+        if (CONST_FOO) {
             console.log("unreachable");
-            var foo;
+            var moo;
             function bar() {}
         }
-        for (var x = 10, y; x && (y || x) && (!typeof x); ++x) {
-            asdf();
-            foo();
-            var moo;
-        }
-        bar();
     }
     expect: {
-        "use strict";
-        var foo;
-        // nothing for the while
-        // as for the for, it should keep:
+        var unused;
+        const CONST_FOO = !1;
         var moo;
-        var x = 10, y;
-        bar();
+        function bar() {}
+    }
+    expect_stdout: true
+}
+
+dead_code_const_annotation: {
+    options = {
+        dead_code    : true,
+        loops        : true,
+        booleans     : true,
+        conditionals : true,
+        evaluate     : true,
+        reduce_vars  : true,
+        toplevel     : true,
+    };
+    input: {
+        var unused;
+        /** @const */ var CONST_FOO_ANN = false;
+        if (CONST_FOO_ANN) {
+            console.log("unreachable");
+            var moo;
+            function bar() {}
+        }
+    }
+    expect: {
+        var unused;
+        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');
+            }
+        }
+    }
+    expect: {
+        var unused_var;
+        var test = 'test';
+        var CONST_FOO_ANN = !1;
+        var unused_var_2;
+        var moo;
+        function bar() {}
+        var beef = 'good';
+        var meat = 'beef';
+        var pork = 'bad';
     }
     expect_stdout: true
-    node_version: ">=4"
 }
 
 try_catch_finally: {
@@ -178,8 +220,6 @@ try_catch_finally: {
         conditionals: true,
         dead_code: true,
         evaluate: true,
-        passes: 2,
-        side_effects: true,
     }
     input: {
         var a = 1;
@@ -232,599 +272,3 @@ accessor: {
     }
     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",
-    ]
-}
-
-collapse_vars_assignment: {
-    options = {
-        collapse_vars: true,
-        dead_code: true,
-        passes: 2,
-        unused: true,
-    }
-    input: {
-        function f0(c) {
-            var a = 3 / c;
-            return a = a;
-        }
-    }
-    expect: {
-        function f0(c) {
-            return 3 / c;
-        }
-    }
-}
-
-collapse_vars_lvalues_drop_assign: {
-    options = {
-        collapse_vars: true,
-        dead_code: true,
-        unused: true,
-    }
-    input: {
-        function f0(x) { var i = ++x; return x += i; }
-        function f1(x) { var a = (x -= 3); return x += a; }
-        function f2(x) { var z = x, a = ++z; return z += a; }
-    }
-    expect: {
-        function f0(x) { var i = ++x; return x + i; }
-        function f1(x) { var a = (x -= 3); return x + a; }
-        function f2(x) { var z = x, a = ++z; return z + a; }
-    }
-}
-
-collapse_vars_misc1: {
-    options = {
-        collapse_vars: true,
-        dead_code: true,
-        unused: true,
-    }
-    input: {
-        function f10(x) { var a = 5, b = 3; return a += b; }
-        function f11(x) { var a = 5, b = 3; return a += --b; }
-    }
-    expect: {
-        function f10(x) { return 5 + 3; }
-        function f11(x) { var b = 3; return 5 + --b; }
-    }
-}
-
-return_assignment: {
-    options = {
-        dead_code: true,
-        unused: true,
-    }
-    input: {
-        function f1(a, b, c) {
-            return a = x(), b = y(), b = a && (c >>= 5);
-        }
-        function f2() {
-            return e = x();
-        }
-        function f3(e) {
-            return e = x();
-        }
-        function f4() {
-            var e;
-            return e = x();
-        }
-        function f5(a) {
-            try {
-                return a = x();
-            } catch (b) {
-                console.log(a);
-            }
-        }
-        function f6(a) {
-            try {
-                return a = x();
-            } finally {
-                console.log(a);
-            }
-        }
-        function y() {
-            console.log("y");
-        }
-        function test(inc) {
-            var counter = 0;
-            x = function() {
-                counter += inc;
-                if (inc < 0) throw counter;
-                return counter;
-            };
-            [ f1, f2, f3, f4, f5, f6 ].forEach(function(f, i) {
-                e = null;
-                try {
-                    i += 1;
-                    console.log("result " + f(10 * i, 100 * i, 1000 * i));
-                } catch (x) {
-                    console.log("caught " + x);
-                }
-                if (null !== e) console.log("e: " + e);
-            });
-        }
-        var x, e;
-        test(1);
-        test(-1);
-    }
-    expect: {
-        function f1(a, b, c) {
-            return a = x(), y(), a && (c >> 5);
-        }
-        function f2() {
-            return e = x();
-        }
-        function f3(e) {
-            return x();
-        }
-        function f4() {
-            return x();
-        }
-        function f5(a) {
-            try {
-                return x();
-            } catch (b) {
-                console.log(a);
-            }
-        }
-        function f6(a) {
-            try {
-                return a = x();
-            } finally {
-                console.log(a);
-            }
-        }
-        function y() {
-            console.log("y");
-        }
-        function test(inc) {
-            var counter = 0;
-            x = function() {
-                counter += inc;
-                if (inc < 0) throw counter;
-                return counter;
-            };
-            [ f1, f2, f3, f4, f5, f6 ].forEach(function(f, i) {
-                e = null;
-                try {
-                    i += 1;
-                    console.log("result " + f(10 * i, 100 * i, 1000 * i));
-                } catch (x) {
-                    console.log("caught " + x);
-                }
-                if (null !== e) console.log("e: " + e);
-            });
-        }
-        var x, e;
-        test(1);
-        test(-1);
-    }
-    expect_stdout: [
-        "y",
-        "result 31",
-        "result 2",
-        "e: 2",
-        "result 3",
-        "result 4",
-        "result 5",
-        "6",
-        "result 6",
-        "caught -1",
-        "caught -2",
-        "caught -3",
-        "caught -4",
-        "50",
-        "result undefined",
-        "60",
-        "caught -6",
-    ]
-}
-
-throw_assignment: {
-    options = {
-        dead_code: true,
-        unused: true,
-    }
-    input: {
-        function f1() {
-            throw a = x();
-        }
-        function f2(a) {
-            throw a = x();
-        }
-        function f3() {
-            var a;
-            throw a = x();
-        }
-        function f4() {
-            try {
-                throw a = x();
-            } catch (b) {
-                console.log(a);
-            }
-        }
-        function f5(a) {
-            try {
-                throw a = x();
-            } catch (b) {
-                console.log(a);
-            }
-        }
-        function f6() {
-            var a;
-            try {
-                throw a = x();
-            } catch (b) {
-                console.log(a);
-            }
-        }
-        function f7() {
-            try {
-                throw a = x();
-            } finally {
-                console.log(a);
-            }
-        }
-        function f8(a) {
-            try {
-                throw a = x();
-            } finally {
-                console.log(a);
-            }
-        }
-        function f9() {
-            var a;
-            try {
-                throw a = x();
-            } finally {
-                console.log(a);
-            }
-        }
-        function test(inc) {
-            var counter = 0;
-            x = function() {
-                counter += inc;
-                if (inc < 0) throw counter;
-                return counter;
-            };
-            [ f1, f2, f3, f4, f5, f6, f7, f8, f9 ].forEach(function(f, i) {
-                a = null;
-                try {
-                    f(10 * (1 + i));
-                } catch (x) {
-                    console.log("caught " + x);
-                }
-                if (null !== a) console.log("a: " + a);
-            });
-        }
-        var x, a;
-        test(1);
-        test(-1);
-    }
-    expect: {
-        function f1() {
-            throw a = x();
-        }
-        function f2(a) {
-            throw x();
-        }
-        function f3() {
-            throw x();
-        }
-        function f4() {
-            try {
-                throw a = x();
-            } catch (b) {
-                console.log(a);
-            }
-        }
-        function f5(a) {
-            try {
-                throw a = x();
-            } catch (b) {
-                console.log(a);
-            }
-        }
-        function f6() {
-            var a;
-            try {
-                throw a = x();
-            } catch (b) {
-                console.log(a);
-            }
-        }
-        function f7() {
-            try {
-                throw a = x();
-            } finally {
-                console.log(a);
-            }
-        }
-        function f8(a) {
-            try {
-                throw a = x();
-            } finally {
-                console.log(a);
-            }
-        }
-        function f9() {
-            var a;
-            try {
-                throw a = x();
-            } finally {
-                console.log(a);
-            }
-        }
-        function test(inc) {
-            var counter = 0;
-            x = function() {
-                counter += inc;
-                if (inc < 0) throw counter;
-                return counter;
-            };
-            [ f1, f2, f3, f4, f5, f6, f7, f8, f9 ].forEach(function(f, i) {
-                a = null;
-                try {
-                    f(10 * (1 + i));
-                } catch (x) {
-                    console.log("caught " + x);
-                }
-                if (null !== a) console.log("a: " + a);
-            });
-        }
-        var x, a;
-        test(1);
-        test(-1);
-    }
-    expect_stdout: [
-        "caught 1",
-        "a: 1",
-        "caught 2",
-        "caught 3",
-        "4",
-        "a: 4",
-        "5",
-        "6",
-        "7",
-        "caught 7",
-        "a: 7",
-        "8",
-        "caught 8",
-        "9",
-        "caught 9",
-        "caught -1",
-        "caught -2",
-        "caught -3",
-        "null",
-        "50",
-        "undefined",
-        "null",
-        "caught -7",
-        "80",
-        "caught -8",
-        "undefined",
-        "caught -9",
-    ]
-}
-
-issue_2597: {
-    options = {
-        dead_code: true,
-    }
-    input: {
-        function f(b) {
-            try {
-                try {
-                    throw "foo";
-                } catch (e) {
-                    return b = true;
-                }
-            } finally {
-                b && (a = "PASS");
-            }
-        }
-        var a = "FAIL";
-        f();
-        console.log(a);
-    }
-    expect: {
-        function f(b) {
-            try {
-                try {
-                    throw "foo";
-                } catch (e) {
-                    return b = true;
-                }
-            } finally {
-                b && (a = "PASS");
-            }
-        }
-        var a = "FAIL";
-        f();
-        console.log(a);
-    }
-    expect_stdout: "PASS"
-}

test/compress/drop-unused.js

@@ -179,9 +179,7 @@ keep_fnames: {
 }
 
 drop_assign: {
-    options = {
-        unused: true,
-    }
+    options = { unused: true };
     input: {
         function f1() {
             var a;
@@ -202,7 +200,7 @@ drop_assign: {
             var a;
             return function() {
                 a = 1;
-            };
+            }
         }
     }
     expect: {
@@ -219,17 +217,16 @@ drop_assign: {
             return 1;
         }
         function f5() {
+            var a;
             return function() {
-                1;
-            };
+                a = 1;
+            }
         }
     }
 }
 
 keep_assign: {
-    options = {
-        unused: "keep_assign",
-    }
+    options = { unused: "keep_assign" };
     input: {
         function f1() {
             var a;
@@ -250,7 +247,7 @@ keep_assign: {
             var a;
             return function() {
                 a = 1;
-            };
+            }
         }
     }
     expect: {
@@ -273,22 +270,19 @@ keep_assign: {
             var a;
             return function() {
                 a = 1;
-            };
+            }
         }
     }
 }
 
 drop_toplevel_funcs: {
-    options = {
-        toplevel: "funcs",
-        unused: true,
-    }
+    options = { toplevel: "funcs", unused: true };
     input: {
         var a, b = 1, c = g;
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -304,16 +298,13 @@ drop_toplevel_funcs: {
 }
 
 drop_toplevel_vars: {
-    options = {
-        toplevel: "vars",
-        unused: true,
-    }
+    options = { toplevel: "vars", unused: true };
     input: {
         var a, b = 1, c = g;
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -321,10 +312,11 @@ drop_toplevel_vars: {
         console.log(b = 3);
     }
     expect: {
+        var c = g;
         function f(d) {
             return function() {
-                2;
-            };
+                c = 2;
+            }
         }
         2;
         function g() {}
@@ -334,17 +326,13 @@ drop_toplevel_vars: {
 }
 
 drop_toplevel_vars_fargs: {
-    options = {
-        keep_fargs: false,
-        toplevel: "vars",
-        unused: true,
-    }
+    options = { keep_fargs: false, toplevel: "vars", unused: true };
     input: {
         var a, b = 1, c = g;
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -352,10 +340,11 @@ drop_toplevel_vars_fargs: {
         console.log(b = 3);
     }
     expect: {
+        var c = g;
         function f() {
             return function() {
-                2;
-            };
+                c = 2;
+            }
         }
         2;
         function g() {}
@@ -365,16 +354,13 @@ drop_toplevel_vars_fargs: {
 }
 
 drop_toplevel_all: {
-    options = {
-        toplevel: true,
-        unused: true
-    }
+    options = { toplevel: true, unused: true };
     input: {
         var a, b = 1, c = g;
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -388,16 +374,13 @@ drop_toplevel_all: {
 }
 
 drop_toplevel_retain: {
-    options = {
-        top_retain: "f,a,o",
-        unused: true,
-    }
+    options = { top_retain: "f,a,o", unused: true };
     input: {
         var a, b = 1, c = g;
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -405,28 +388,26 @@ drop_toplevel_retain: {
         console.log(b = 3);
     }
     expect: {
-        var a;
+        var a, c = g;
         function f(d) {
             return function() {
-                2;
-            };
+                c = 2;
+            }
         }
         a = 2;
+        function g() {}
         console.log(3);
     }
 }
 
 drop_toplevel_retain_array: {
-    options = {
-        top_retain: [ "f", "a", "o" ],
-        unused: true,
-    }
+    options = { top_retain: [ "f", "a", "o" ], unused: true };
     input: {
         var a, b = 1, c = g;
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -434,28 +415,26 @@ drop_toplevel_retain_array: {
         console.log(b = 3);
     }
     expect: {
-        var a;
+        var a, c = g;
         function f(d) {
             return function() {
-                2;
-            };
+                c = 2;
+            }
         }
         a = 2;
+        function g() {}
         console.log(3);
     }
 }
 
 drop_toplevel_retain_regex: {
-    options = {
-        top_retain: /^[fao]$/,
-        unused: true,
-    }
+    options = { top_retain: /^[fao]$/, unused: true };
     input: {
         var a, b = 1, c = g;
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -463,29 +442,26 @@ drop_toplevel_retain_regex: {
         console.log(b = 3);
     }
     expect: {
-        var a;
+        var a, c = g;
         function f(d) {
             return function() {
-                2;
-            };
+                c = 2;
+            }
         }
         a = 2;
+        function g() {}
         console.log(3);
     }
 }
 
 drop_toplevel_all_retain: {
-    options = {
-        toplevel: true,
-        top_retain: "f,a,o",
-        unused: true,
-    }
+    options = { toplevel: true, top_retain: "f,a,o", unused: true };
     input: {
         var a, b = 1, c = g;
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -493,29 +469,26 @@ drop_toplevel_all_retain: {
         console.log(b = 3);
     }
     expect: {
-        var a;
+        var a, c = g;
         function f(d) {
             return function() {
-                2;
-            };
+                c = 2;
+            }
         }
         a = 2;
+        function g() {}
         console.log(3);
     }
 }
 
 drop_toplevel_funcs_retain: {
-    options = {
-        toplevel: "funcs",
-        top_retain: "f,a,o",
-        unused: true,
-    }
+    options = { toplevel: "funcs", top_retain: "f,a,o", unused: true };
     input: {
         var a, b = 1, c = g;
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -527,7 +500,7 @@ drop_toplevel_funcs_retain: {
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -536,17 +509,13 @@ drop_toplevel_funcs_retain: {
 }
 
 drop_toplevel_vars_retain: {
-    options = {
-        toplevel: "vars",
-        top_retain: "f,a,o",
-        unused: true,
-    }
+    options = { toplevel: "vars", top_retain: "f,a,o", unused: true };
     input: {
         var a, b = 1, c = g;
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -554,11 +523,11 @@ drop_toplevel_vars_retain: {
         console.log(b = 3);
     }
     expect: {
-        var a;
+        var a, c = g;
         function f(d) {
             return function() {
-                2;
-            };
+                c = 2;
+            }
         }
         a = 2;
         function g() {}
@@ -568,16 +537,13 @@ drop_toplevel_vars_retain: {
 }
 
 drop_toplevel_keep_assign: {
-    options = {
-        toplevel: true,
-        unused: "keep_assign",
-    }
+    options = { toplevel: true, unused: "keep_assign" };
     input: {
         var a, b = 1, c = g;
         function f(d) {
             return function() {
                 c = 2;
-            };
+            }
         }
         a = 2;
         function g() {}
@@ -683,9 +649,40 @@ 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 = {
-        collapse_vars: true,
+        cascade: true,
         sequences: true,
         side_effects: true,
         unused: true,
@@ -707,7 +704,6 @@ issue_1539: {
 vardef_value: {
     options = {
         keep_fnames: false,
-        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -732,7 +728,7 @@ vardef_value: {
 
 assign_binding: {
     options = {
-        collapse_vars: true,
+        cascade: true,
         side_effects: true,
         unused: true,
     }
@@ -769,7 +765,6 @@ assign_chain: {
 issue_1583: {
     options = {
         keep_fargs: true,
-        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -787,10 +782,10 @@ issue_1583: {
     expect: {
         function m(t) {
             (function(e) {
-                (function() {
+                t = (function() {
                     return (function(a) {
-                        return function(a) {};
-                    })();
+                        return a;
+                    })(function(a) {});
                 })();
             })();
         }
@@ -821,6 +816,10 @@ issue_1709: {
                 var x = 1;
                 return x;
             }(),
+            function y() {
+                const y = 2;
+                return y;
+            }(),
             function z() {
                 function z() {}
                 return z;
@@ -833,6 +832,10 @@ issue_1709: {
                 var x = 1;
                 return x;
             }(),
+            function() {
+                const y = 2;
+                return y;
+            }(),
             function() {
                 function z() {}
                 return z;
@@ -932,8 +935,7 @@ issue_1715_3: {
             try {
                 console;
             } catch (a) {
-                var a;
-                x();
+                var a = x();
             }
         }
         f();
@@ -1028,33 +1030,6 @@ delete_assign_2: {
     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,
@@ -1090,326 +1065,27 @@ issue_1830_2: {
     expect_stdout: "1"
 }
 
-issue_1838: {
+reassign_const: {
     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 = {
-        collapse_vars: true,
+        cascade: true,
         sequences: true,
         side_effects: true,
         unused: true,
     }
     input: {
-        console.log(function(a, b) {
-            a += b;
+        function f() {
+            const a = 1;
+            a = 2;
             return a;
-        }(1, 2));
+        }
+        console.log(f());
     }
     expect: {
-        console.log(function(a, b) {
-            return a += 2;
-        }(1));
-    }
-    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 (var i = 0; i < 0; i++);
-            for (i = 0; i < 0; i++);
-        }
-    }
-}
-
-issue_2516_1: {
-    options = {
-        collapse_vars: true,
-        reduce_funcs: true,
-        reduce_vars: true,
-        unused: true,
-    }
-    input: {
-        function foo() {
-            function qux(x) {
-                bar.call(null, x);
-            }
-            function bar(x) {
-                var FOUR = 4;
-                var trouble = x || never_called();
-                var value = (FOUR - 1) * trouble;
-                console.log(value == 6 ? "PASS" : value);
-            }
-            Baz = qux;
-        }
-        var Baz;
-        foo();
-        Baz(2);
-    }
-    expect: {
-        function foo() {
-            Baz = function(x) {
-                (function(x) {
-                    var trouble = x || never_called();
-                    var value = (4 - 1) * trouble;
-                    console.log(6 == value ? "PASS" : value);
-                }).call(null, x);
-            };
-        }
-        var Baz;
-        foo();
-        Baz(2);
-    }
-}
-
-issue_2516_2: {
-    options = {
-        collapse_vars: true,
-        reduce_funcs: true,
-        reduce_vars: true,
-        passes: 2,
-        unused: true,
-    }
-    input: {
-        function foo() {
-            function qux(x) {
-                bar.call(null, x);
-            }
-            function bar(x) {
-                var FOUR = 4;
-                var trouble = x || never_called();
-                var value = (FOUR - 1) * trouble;
-                console.log(value == 6 ? "PASS" : value);
-            }
-            Baz = qux;
-        }
-        var Baz;
-        foo();
-        Baz(2);
-    }
-    expect: {
-        function foo() {
-            Baz = function(x) {
-                (function(x) {
-                    var value = (4 - 1) * (x || never_called());
-                    console.log(6 == value ? "PASS" : value);
-                }).call(null, x);
-            };
-        }
-        var Baz;
-        foo();
-        Baz(2);
+        function f() {
+            const a = 1;
+            return a = 2, a;
+        }
+        console.log(f());
     }
+    expect_stdout: true
 }

test/compress/evaluate.js

@@ -1,7 +1,6 @@
 and: {
     options = {
-        evaluate: true,
-        side_effects: true,
+        evaluate: true
     }
     input: {
         var a;
@@ -77,8 +76,7 @@ and: {
 
 or: {
     options = {
-        evaluate: true,
-        side_effects: true,
+        evaluate: true
     }
     input: {
         var a;
@@ -160,8 +158,7 @@ or: {
 
 unary_prefix: {
     options = {
-        evaluate: true,
-        side_effects: true,
+        evaluate: true
     }
     input: {
         a = !0 && b;
@@ -253,27 +250,22 @@ unsafe_constant: {
 
 unsafe_object: {
     options = {
-        evaluate: true,
-        reduce_funcs: true,
-        reduce_vars: true,
-        toplevel: true,
-        unsafe: true,
+        evaluate  : true,
+        unsafe    : true
     }
     input: {
-        var o = { a: 1 };
         console.log(
-            o + 1,
-            o.a + 1,
-            o.b + 1,
-            o.a.b + 1
+            ({a:1}) + 1,
+            ({a:1}).a + 1,
+            ({a:1}).b + 1,
+            ({a:1}).a.b + 1
         );
     }
     expect: {
-        var o = { a: 1 };
         console.log(
-            o + 1,
+            ({a:1}) + 1,
             2,
-            o.b + 1,
+            ({a:1}).b + 1,
             1..b + 1
         );
     }
@@ -282,27 +274,22 @@ unsafe_object: {
 
 unsafe_object_nested: {
     options = {
-        evaluate: true,
-        reduce_funcs: true,
-        reduce_vars: true,
-        toplevel: true,
-        unsafe: true,
+        evaluate  : true,
+        unsafe    : true
     }
     input: {
-        var o = { a: { b: 1 } };
         console.log(
-            o + 1,
-            o.a + 1,
-            o.b + 1,
-            o.a.b + 1
+            ({a:{b:1}}) + 1,
+            ({a:{b:1}}).a + 1,
+            ({a:{b:1}}).b + 1,
+            ({a:{b:1}}).a.b + 1
         );
     }
     expect: {
-        var o = { a: { b: 1 } };
         console.log(
-            o + 1,
-            o.a + 1,
-            o.b + 1,
+            ({a:{b:1}}) + 1,
+            ({a:{b:1}}).a + 1,
+            ({a:{b:1}}).b + 1,
             2
         );
     }
@@ -311,26 +298,21 @@ unsafe_object_nested: {
 
 unsafe_object_complex: {
     options = {
-        evaluate: true,
-        reduce_funcs: true,
-        reduce_vars: true,
-        toplevel: true,
-        unsafe: true,
+        evaluate  : true,
+        unsafe    : true
     }
     input: {
-        var o = { a: { b: 1 }, b: 1 };
         console.log(
-            o + 1,
-            o.a + 1,
-            o.b + 1,
-            o.a.b + 1
+            ({a:{b:1},b:1}) + 1,
+            ({a:{b:1},b:1}).a + 1,
+            ({a:{b:1},b:1}).b + 1,
+            ({a:{b:1},b:1}).a.b + 1
         );
     }
     expect: {
-        var o = { a: { b: 1 }, b: 1 };
         console.log(
-            o + 1,
-            o.a + 1,
+            ({a:{b:1},b:1}) + 1,
+            ({a:{b:1},b:1}).a + 1,
             2,
             2
         );
@@ -340,27 +322,22 @@ unsafe_object_complex: {
 
 unsafe_object_repeated: {
     options = {
-        evaluate: true,
-        reduce_funcs: true,
-        reduce_vars: true,
-        toplevel: true,
-        unsafe: true,
+        evaluate  : true,
+        unsafe    : true
     }
     input: {
-        var o = { a: { b: 1 }, a: 1 };
         console.log(
-            o + 1,
-            o.a + 1,
-            o.b + 1,
-            o.a.b + 1
+            ({a:{b:1},a:1}) + 1,
+            ({a:{b:1},a:1}).a + 1,
+            ({a:{b:1},a:1}).b + 1,
+            ({a:{b:1},a:1}).a.b + 1
         );
     }
     expect: {
-        var o = { a: { b: 1 }, a: 1 };
         console.log(
-            o + 1,
+            ({a:{b:1},a:1}) + 1,
             2,
-            o.b + 1,
+            ({a:{b:1},a:1}).b + 1,
             1..b + 1
         );
     }
@@ -370,7 +347,6 @@ unsafe_object_repeated: {
 unsafe_object_accessor: {
     options = {
         evaluate: true,
-        reduce_funcs: true,
         reduce_vars: true,
         unsafe: true,
     }
@@ -394,11 +370,10 @@ unsafe_object_accessor: {
     }
 }
 
-prop_function: {
+unsafe_function: {
     options = {
-        evaluate: true,
-        properties: true,
-        side_effects: true,
+        evaluate  : true,
+        unsafe    : true
     }
     input: {
         console.log(
@@ -411,9 +386,9 @@ prop_function: {
     expect: {
         console.log(
             ({a:{b:1},b:function(){}}) + 1,
-            ({b:1}) + 1,
-            function(){} + 1,
-            2
+            ({a:{b:1},b:function(){}}).a + 1,
+            ({a:{b:1},b:function(){}}).b + 1,
+            ({a:{b:1},b:function(){}}).a.b + 1
         );
     }
     expect_stdout: true
@@ -639,11 +614,10 @@ unsafe_string_bad_index: {
     expect_stdout: true
 }
 
-prototype_function: {
+unsafe_prototype_function: {
     options = {
-        evaluate: true,
-        properties: true,
-        side_effects: true,
+        evaluate  : true,
+        unsafe    : true
     }
     input: {
         var a = ({valueOf: 0}) < 1;
@@ -662,28 +636,25 @@ prototype_function: {
         var d = ({toString: 0}) + "";
         var e = (({valueOf: 0}) + "")[2];
         var f = (({toString: 0}) + "")[2];
-        var g = 0();
-        var h = 0();
+        var g = ({valueOf: 0}).valueOf();
+        var h = "" + ({toString: 0});
     }
 }
 
 call_args: {
     options = {
         evaluate: true,
-        inline: true,
-        reduce_funcs: true,
         reduce_vars: true,
-        toplevel: true,
     }
     input: {
-        var a = 1;
+        const a = 1;
         console.log(a);
         +function(a) {
             return a;
         }(a);
     }
     expect: {
-        var a = 1;
+        const a = 1;
         console.log(1);
         +(1, 1);
     }
@@ -693,21 +664,19 @@ 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: {
-        var a = 1;
+        const a = 1;
         console.log(a);
         +function(a) {
             return a;
         }(a, b);
     }
     expect: {
+        const a = 1;
         console.log(1);
         +(b, 1);
     }
@@ -810,15 +779,13 @@ unsafe_charAt_noop: {
     input: {
         console.log(
             s.charAt(0),
-            "string".charAt(x),
-            (typeof x).charAt()
+            "string".charAt(x)
         );
     }
     expect: {
         console.log(
             s.charAt(0),
-            "string".charAt(x),
-            (typeof x)[0]
+            "string".charAt(x)
         );
     }
 }
@@ -955,12 +922,12 @@ delete_binary_1: {
         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);
+        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((NaN, !0));
     }
     expect_stdout: true
 }
@@ -981,12 +948,12 @@ delete_binary_2: {
         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);
+        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((NaN, !0));
     }
     expect_stdout: true
 }
@@ -1022,321 +989,3 @@ Infinity_NaN_undefined_LHS: {
         "}",
     ]
 }
-
-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'"
-}
-
-issue_2535_1: {
-    options = {
-        booleans: true,
-        evaluate: true,
-        sequences: true,
-        side_effects: true,
-    }
-    input: {
-        if ((x() || true) || y()) z();
-        if ((x() || true) && y()) z();
-        if ((x() && true) || y()) z();
-        if ((x() && true) && y()) z();
-        if ((x() || false) || y()) z();
-        if ((x() || false) && y()) z();
-        if ((x() && false) || y()) z();
-        if ((x() && false) && y()) z();
-    }
-    expect: {
-        if (x(), 1) z();
-        if (x(), y()) z();
-        if (x() || y()) z();
-        if (x() && y()) z();
-        if (x() || y()) z();
-        if (x() && y()) z();
-        if (x(), y()) z();
-        if (x(), 0) z();
-    }
-}
-
-issue_2535_2: {
-    options = {
-        booleans: true,
-        evaluate: true,
-        sequences: true,
-        side_effects: true,
-    }
-    input: {
-        (x() || true) || y();
-        (x() || true) && y();
-        (x() && true) || y();
-        (x() && true) && y();
-        (x() || false) || y();
-        (x() || false) && y();
-        (x() && false) || y();
-        (x() && false) && y();
-    }
-    expect: {
-        x(),
-        x(), y(),
-        x() || y(),
-        x() && y(),
-        x() || y(),
-        x() && y(),
-        x(), y(),
-        x();
-    }
-}
-
-issue_2535_3: {
-    options = {
-        booleans: true,
-        evaluate: true,
-    }
-    input: {
-        console.log(Object(1) && 1 && 2);
-        console.log(Object(1) && true && 1 && 2 && Object(2));
-        console.log(Object(1) && true && 1 && null && 2 && Object(2));
-        console.log(2 == Object(1) || 0 || void 0 || null);
-        console.log(2 == Object(1) || 0 || void 0 || null || Object(2));
-        console.log(2 == Object(1) || 0 || void 0 || "ok" || null || Object(2));
-    }
-    expect: {
-        console.log(Object(1) && 2);
-        console.log(Object(1) && Object(2));
-        console.log(Object(1) && null);
-        console.log(2 == Object(1) || null);
-        console.log(2 == Object(1) || Object(2));
-        console.log(2 == Object(1) || "ok");
-    }
-    expect_stdout: true
-    expect_warnings: [
-        "WARN: Dropping side-effect-free && [test/compress/evaluate.js:1316,20]",
-        "WARN: Dropping side-effect-free && [test/compress/evaluate.js:1317,20]",
-        "WARN: Dropping side-effect-free && [test/compress/evaluate.js:1318,20]",
-        "WARN: Condition left of && always false [test/compress/evaluate.js:1318,20]",
-        "WARN: Dropping side-effect-free || [test/compress/evaluate.js:1319,20]",
-        "WARN: Dropping side-effect-free || [test/compress/evaluate.js:1320,20]",
-        "WARN: Dropping side-effect-free || [test/compress/evaluate.js:1321,20]",
-        "WARN: Condition left of || always true [test/compress/evaluate.js:1321,20]",
-    ]
-}

test/compress/global_defs.js

@@ -37,7 +37,6 @@ object: {
                 VALUE: 42,
             },
         },
-        side_effects: true,
         unsafe: true,
     }
     input: {
@@ -121,7 +120,7 @@ mixed: {
         properties: true,
     }
     input: {
-        var FOO = { BAR: 0 };
+        const FOO = { BAR: 0 };
         console.log(FOO.BAR);
         console.log(++CONFIG.DEBUG);
         console.log(++CONFIG.VALUE);
@@ -131,7 +130,7 @@ mixed: {
         console.log(CONFIG);
     }
     expect: {
-        var FOO = { BAR: 0 };
+        const FOO = { BAR: 0 };
         console.log("moo");
         console.log(++CONFIG.DEBUG);
         console.log(++CONFIG.VALUE);
@@ -141,9 +140,9 @@ 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:128,22]',
-        'WARN: global_defs CONFIG.VALUE redefined [test/compress/global_defs.js:130,8]',
+        'WARN: global_defs CONFIG.VALUE redefined [test/compress/global_defs.js:129,8]',
     ]
 }
 
@@ -161,39 +160,3 @@ issue_1801: {
         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(){}",
-        },
-        passes: 2,
-        side_effects: true,
-    }
-    input: {
-        if (isDevMode()) {
-            greetOverlord();
-        }
-        doWork();
-    }
-    expect: {
-        doWork();
-    }
-}

test/compress/hoist_props.js

@@ -1,666 +0,0 @@
-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, (x = 3, x * x * x));
-        var x;
-    }
-    expect_stdout: "1 27"
-}
-
-issue_2377_3: {
-    options = {
-        evaluate: true,
-        inline: true,
-        hoist_props: true,
-        passes: 4,
-        reduce_funcs: true,
-        reduce_vars: true,
-        side_effects: 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"
-}
-
-issue_2508_1: {
-    options = {
-        collapse_vars: true,
-        hoist_props: true,
-        reduce_vars: true,
-        toplevel: true,
-        unused: true,
-    }
-    input: {
-        var o = {
-            a: [ 1 ],
-            f: function(x) {
-                console.log(x);
-            }
-        };
-        o.f(o.a);
-    }
-    expect: {
-        (function(x) {
-            console.log(x);
-        })([ 1 ]);
-    }
-    expect_stdout: true
-}
-
-issue_2508_2: {
-    options = {
-        collapse_vars: true,
-        hoist_props: true,
-        reduce_vars: true,
-        toplevel: true,
-        unused: true,
-    }
-    input: {
-        var o = {
-            a: { b: 2 },
-            f: function(x) {
-                console.log(x);
-            }
-        };
-        o.f(o.a);
-    }
-    expect: {
-        (function(x) {
-            console.log(x);
-        })({ b: 2 });
-    }
-    expect_stdout: true
-}
-
-issue_2508_3: {
-    options = {
-        collapse_vars: true,
-        hoist_props: true,
-        reduce_vars: true,
-        toplevel: true,
-        unused: true,
-    }
-    input: {
-        var o = {
-            a: [ o ],
-            f: function(x) {
-                console.log(x);
-            }
-        };
-        o.f(o.a);
-    }
-    expect: {
-        var o = {
-            a: [ o ],
-            f: function(x) {
-                console.log(x);
-            }
-        };
-        o.f(o.a);
-    }
-    expect_stdout: true
-}
-
-issue_2508_4: {
-    options = {
-        collapse_vars: true,
-        hoist_props: true,
-        reduce_vars: true,
-        toplevel: true,
-        unused: true,
-    }
-    input: {
-        var o = {
-            a: { b: o },
-            f: function(x) {
-                console.log(x);
-            }
-        };
-        o.f(o.a);
-    }
-    expect: {
-        var o = {
-            a: { b: o },
-            f: function(x) {
-                console.log(x);
-            }
-        };
-        o.f(o.a);
-    }
-    expect_stdout: true
-}
-
-issue_2508_5: {
-    options = {
-        collapse_vars: true,
-        hoist_props: true,
-        reduce_vars: true,
-        toplevel: true,
-        unused: true,
-    }
-    input: {
-        var o = {
-            f: function(x) {
-                console.log(x);
-            }
-        };
-        o.f(o.f);
-    }
-    expect: {
-        var o_f = function(x) {
-            console.log(x);
-        };
-        o_f(o_f);
-    }
-    expect_stdout: true
-}
-
-issue_2519: {
-    options = {
-        collapse_vars: true,
-        evaluate: true,
-        hoist_props: true,
-        reduce_vars: true,
-        unused: true,
-    }
-    input: {
-        function testFunc() {
-            var dimensions = {
-                minX: 5,
-                maxX: 6,
-            };
-            var scale = 1;
-            var d = {
-                x: (dimensions.maxX + dimensions.minX) / 2,
-            };
-            return d.x * scale;
-        }
-        console.log(testFunc());
-    }
-    expect: {
-        function testFunc() {
-            return 1 * ((6 + 5) / 2);
-        }
-        console.log(testFunc());
-    }
-    expect_stdout: "5.5"
-}

test/compress/hoist_vars.js

@@ -88,24 +88,3 @@ 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

@@ -302,27 +302,3 @@ 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

@@ -2,7 +2,7 @@ non_hoisted_function_after_return: {
     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, side_effects: true
+        if_return: true, join_vars: true, cascade: true, side_effects: true
     }
     input: {
         function foo(x) {
@@ -38,7 +38,7 @@ non_hoisted_function_after_return_2a: {
     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, side_effects: true,
+        if_return: true, join_vars: true, cascade: true, side_effects: true,
         collapse_vars: false, passes: 2, warnings: "verbose"
     }
     input: {
@@ -71,13 +71,11 @@ 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",
     ]
 }
 
@@ -85,7 +83,7 @@ non_hoisted_function_after_return_2b: {
     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, side_effects: true,
+        if_return: true, join_vars: true, cascade: true, side_effects: true,
         collapse_vars: false
     }
     input: {
@@ -111,146 +109,10 @@ non_hoisted_function_after_return_2b: {
     }
     expect_warnings: [
         // duplicate warnings no longer emitted
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:97,16]",
-        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:97,16]",
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:99,12]",
-        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:99,12]",
-        "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, 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, 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, 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]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:95,16]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:95,16]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:97,12]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:97,12]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:101,12]",
     ]
 }

test/compress/issue-1041.js

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

test/compress/issue-1052.js

@@ -1,91 +1,90 @@
 multiple_functions: {
-    options = {
-        hoist_funs: false,
-        if_return: true,
-    }
+    options = { if_return: true, hoist_funs: false };
     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 = {
-        hoist_funs: false,
-        if_return: true,
-    }
+    options = { if_return: true, hoist_funs: false };
     input: {
         ( function() {
             if ( !window ) {
                 return;
             }
+
             function f() {}
         } )();
     }
     expect: {
         ( function() {
-            if ( window );
             function f() {}
+
+            if ( window );
         } )();
     }
 }
 
 deeply_nested: {
-    options = {
-        hoist_funs: false,
-        if_return: true,
-    }
+    options = { if_return: true, hoist_funs: false };
     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 = {
-        hoist_funs: false,
-        if_return: true,
-    }
+    options = { if_return: true, hoist_funs: false };
     input: {
         ( function() {
             if ( !window ) {
                 return;
             }
+
             if ( foo ) function f() {}
+
         } )();
     }
     expect: {
@@ -95,70 +94,3 @@ 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

@@ -190,6 +190,7 @@ assorted_Infinity_NaN_undefined_in_with_scope: {
         keep_fargs:    true,
         if_return:     true,
         join_vars:     true,
+        cascade:       true,
         side_effects:  true,
         sequences:     false,
         keep_infinity: false,
@@ -252,6 +253,7 @@ assorted_Infinity_NaN_undefined_in_with_scope_keep_infinity: {
         keep_fargs:    true,
         if_return:     true,
         join_vars:     true,
+        cascade:       true,
         side_effects:  true,
         sequences:     false,
         keep_infinity: true,

test/compress/issue-1261.js

@@ -8,6 +8,7 @@ pure_function_calls: {
         unused       : true,
         if_return    : true,
         join_vars    : true,
+        cascade      : true,
         negate_iife  : true,
     }
     input: {
@@ -48,13 +49,13 @@ pure_function_calls: {
         a.b(), f.g();
     }
     expect_warnings: [
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:16,8]",
-        "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:16,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:29,37]",
-        "WARN: Dropping unused variable iife2 [test/compress/issue-1261.js:29,16]",
-        "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:27,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:37,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:38,31]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:17,8]",
+        "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:17,8]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:30,37]",
+        "WARN: Dropping unused variable iife2 [test/compress/issue-1261.js:30,16]",
+        "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:28,8]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:38,8]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:39,31]",
     ]
 }
 
@@ -68,6 +69,7 @@ pure_function_calls_toplevel: {
         unused       : true,
         if_return    : true,
         join_vars    : true,
+        cascade      : true,
         negate_iife  : true,
         toplevel     : true,
     }
@@ -94,13 +96,6 @@ 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();
@@ -110,17 +105,15 @@ pure_function_calls_toplevel: {
         a.b(), f.g();
     }
     expect_warnings: [
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:77,8]",
-        "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:77,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:90,37]",
-        "WARN: Dropping unused variable iife2 [test/compress/issue-1261.js:90,16]",
-        "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:88,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:105,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:106,31]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:82,33]",
-        "WARN: Dropping unused variable iife1 [test/compress/issue-1261.js:82,12]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:98,45]",
-        "WARN: Dropping unused variable MyClass [test/compress/issue-1261.js:98,12]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:79,8]",
+        "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:79,8]",
+        "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:101,31]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:84,33]",
+        "WARN: Dropping unused variable iife1 [test/compress/issue-1261.js:84,12]",
     ]
 }
 
@@ -155,29 +148,29 @@ should_warn: {
         baz();
     }
     expect_warnings: [
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:135,61]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:128,61]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:128,23]",
+        "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:128,23]",
+        "WARN: Boolean || always true [test/compress/issue-1261.js:129,23]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:129,23]",
+        "WARN: Condition always true [test/compress/issue-1261.js:129,23]",
+        "WARN: Condition left of || always true [test/compress/issue-1261.js:130,8]",
+        "WARN: Condition always true [test/compress/issue-1261.js:130,8]",
+        "WARN: Boolean && always false [test/compress/issue-1261.js:131,23]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:131,23]",
+        "WARN: Condition always false [test/compress/issue-1261.js:131,23]",
+        "WARN: Condition left of && always false [test/compress/issue-1261.js:132,8]",
+        "WARN: Condition always false [test/compress/issue-1261.js:132,8]",
+        "WARN: + in boolean context always true [test/compress/issue-1261.js:133,23]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:133,23]",
+        "WARN: Condition always true [test/compress/issue-1261.js:133,23]",
+        "WARN: + in boolean context always true [test/compress/issue-1261.js:134,8]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:134,31]",
+        "WARN: Condition always true [test/compress/issue-1261.js:134,8]",
         "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:135,23]",
-        "WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:135,23]",
-        "WARN: Boolean || always true [test/compress/issue-1261.js:136,23]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:136,23]",
-        "WARN: Condition always true [test/compress/issue-1261.js:136,23]",
-        "WARN: Condition left of || always true [test/compress/issue-1261.js:137,8]",
-        "WARN: Condition always true [test/compress/issue-1261.js:137,8]",
-        "WARN: Boolean && always false [test/compress/issue-1261.js:138,23]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:138,23]",
-        "WARN: Condition always false [test/compress/issue-1261.js:138,23]",
-        "WARN: Condition left of && always false [test/compress/issue-1261.js:139,8]",
-        "WARN: Condition always false [test/compress/issue-1261.js:139,8]",
-        "WARN: + in boolean context always true [test/compress/issue-1261.js:140,23]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:140,23]",
-        "WARN: Condition always true [test/compress/issue-1261.js:140,23]",
-        "WARN: + in boolean context always true [test/compress/issue-1261.js:141,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:141,31]",
-        "WARN: Condition always true [test/compress/issue-1261.js:141,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:142,23]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:143,24]",
-        "WARN: Condition always true [test/compress/issue-1261.js:143,8]",
-        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:144,31]",
-        "WARN: Condition always false [test/compress/issue-1261.js:144,8]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:136,24]",
+        "WARN: Condition always true [test/compress/issue-1261.js:136,8]",
+        "WARN: Dropping __PURE__ call [test/compress/issue-1261.js:137,31]",
+        "WARN: Condition always false [test/compress/issue-1261.js:137,8]",
     ]
 }

test/compress/issue-1275.js

@@ -9,6 +9,7 @@ string_plus_optimization: {
         unused        : true,
         if_return     : true,
         join_vars     : true,
+        cascade       : true,
         hoist_funs    : true,
     };
     input: {

test/compress/issue-1321.js

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

test/compress/issue-1446.js

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

test/compress/issue-1447.js

@@ -32,6 +32,7 @@ conditional_false_stray_else_in_loop: {
         hoist_vars   : true,
         join_vars    : true,
         if_return    : true,
+        cascade      : true,
         conditionals : false,
     }
     input: {

test/compress/issue-1588.js

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

@@ -2,7 +2,6 @@ chained_evaluation_1: {
     options = {
         collapse_vars: true,
         evaluate: true,
-        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -19,7 +18,9 @@ chained_evaluation_1: {
     expect: {
         (function() {
             (function() {
-                f(1).bar = 1;
+                var c;
+                c = f(1);
+                c.bar = 1;
             })();
         })();
     }
@@ -29,7 +30,6 @@ chained_evaluation_2: {
     options = {
         collapse_vars: true,
         evaluate: true,
-        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -46,8 +46,9 @@ chained_evaluation_2: {
     expect: {
         (function() {
             (function() {
-                var b = "long piece of string";
-                f(b).bar = b;
+                var c, b = "long piece of string";
+                c = f(b);
+                c.bar = b;
             })();
         })();
     }

test/compress/issue-1639.js

@@ -2,7 +2,7 @@
 issue_1639_1: {
     options = {
         booleans: true,
-        collapse_vars: true,
+        cascade: true,
         conditionals: true,
         evaluate: true,
         join_vars: true,
@@ -26,7 +26,7 @@ issue_1639_1: {
     }
     expect: {
         for (var a = 100, b = 10, L1 = 5; --L1 > 0;)
-            if (--b, 0) var ignore = 0;
+            if (--b, !1) var ignore = 0;
         console.log(a, b);
     }
     expect_stdout: true
@@ -35,7 +35,7 @@ issue_1639_1: {
 issue_1639_2: {
     options = {
         booleans: true,
-        collapse_vars: true,
+        cascade: true,
         conditionals: true,
         evaluate: true,
         join_vars: true,
@@ -57,7 +57,7 @@ issue_1639_2: {
     expect: {
         var a = 100, b = 10;
         function f19() {
-            ++a, 0;
+            ++a, 1;
         }
         f19(),
         console.log(a, b);
@@ -68,7 +68,7 @@ issue_1639_2: {
 issue_1639_3: {
     options = {
         booleans: true,
-        collapse_vars: true,
+        cascade: true,
         conditionals: true,
         evaluate: true,
         sequences: true,

test/compress/issue-1656.js

@@ -1,6 +1,7 @@
 f7: {
     options = {
         booleans: true,
+        cascade: true,
         collapse_vars: true,
         comparisons: true,
         conditionals: true,
@@ -14,7 +15,6 @@ f7: {
         negate_iife: true,
         passes: 3,
         properties: true,
-        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         side_effects: true,
@@ -38,7 +38,7 @@ f7: {
         "var b = 10;",
         "",
         "!function() {",
-        "    b = 100;",
+        "    for (;b = 100, !1; ) ;",
         "}(), console.log(100, b);",
     ]
     expect_stdout: true

test/compress/issue-1673.js

@@ -1,6 +1,5 @@
 side_effects_catch: {
     options = {
-        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -35,7 +34,6 @@ side_effects_catch: {
 
 side_effects_else: {
     options = {
-        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -64,7 +62,6 @@ side_effects_else: {
 
 side_effects_finally: {
     options = {
-        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -101,7 +98,6 @@ side_effects_finally: {
 
 side_effects_label: {
     options = {
-        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -134,7 +130,6 @@ 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 = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: false,
     }
     mangle = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: false,
     }
     input: {
@@ -22,11 +22,11 @@ mangle_catch: {
 
 mangle_catch_ie8: {
     options = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: false,
     }
     mangle = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: false,
     }
     input: {
@@ -44,11 +44,11 @@ mangle_catch_ie8: {
 
 mangle_catch_var: {
     options = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: false,
     }
     mangle = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: false,
     }
     input: {
@@ -66,11 +66,11 @@ mangle_catch_var: {
 
 mangle_catch_var_ie8: {
     options = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: false,
     }
     mangle = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: false,
     }
     input: {
@@ -88,11 +88,11 @@ mangle_catch_var_ie8: {
 
 mangle_catch_toplevel: {
     options = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: true,
     }
     mangle = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: true,
     }
     input: {
@@ -110,11 +110,11 @@ mangle_catch_toplevel: {
 
 mangle_catch_ie8_toplevel: {
     options = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: true,
     }
     mangle = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: true,
     }
     input: {
@@ -132,11 +132,11 @@ mangle_catch_ie8_toplevel: {
 
 mangle_catch_var_toplevel: {
     options = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: true,
     }
     mangle = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: true,
     }
     input: {
@@ -154,11 +154,11 @@ mangle_catch_var_toplevel: {
 
 mangle_catch_var_ie8_toplevel: {
     options = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: true,
     }
     mangle = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: true,
     }
     input: {
@@ -176,11 +176,11 @@ mangle_catch_var_ie8_toplevel: {
 
 mangle_catch_redef_1: {
     options = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: false,
     }
     mangle = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: false,
     }
     input: {
@@ -198,11 +198,11 @@ mangle_catch_redef_1: {
 
 mangle_catch_redef_1_ie8: {
     options = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: false,
     }
     mangle = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: false,
     }
     input: {
@@ -220,11 +220,11 @@ mangle_catch_redef_1_ie8: {
 
 mangle_catch_redef_1_toplevel: {
     options = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: true,
     }
     mangle = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: true,
     }
     input: {
@@ -242,11 +242,11 @@ mangle_catch_redef_1_toplevel: {
 
 mangle_catch_redef_1_ie8_toplevel: {
     options = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: true,
     }
     mangle = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: true,
     }
     input: {
@@ -264,11 +264,11 @@ mangle_catch_redef_1_ie8_toplevel: {
 
 mangle_catch_redef_2: {
     options = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: false,
     }
     mangle = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: false,
     }
     input: {
@@ -285,11 +285,11 @@ mangle_catch_redef_2: {
 
 mangle_catch_redef_2_ie8: {
     options = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: false,
     }
     mangle = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: false,
     }
     input: {
@@ -306,11 +306,11 @@ mangle_catch_redef_2_ie8: {
 
 mangle_catch_redef_2_toplevel: {
     options = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: true,
     }
     mangle = {
-        ie8: false,
+        screw_ie8: true,
         toplevel: true,
     }
     input: {
@@ -327,11 +327,11 @@ mangle_catch_redef_2_toplevel: {
 
 mangle_catch_redef_2_ie8_toplevel: {
     options = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: true,
     }
     mangle = {
-        ie8: true,
+        screw_ie8: false,
         toplevel: true,
     }
     input: {

test/compress/issue-1733.js

@@ -1,6 +1,6 @@
 function_iife_catch: {
     mangle = {
-        ie8: false,
+        screw_ie8: true,
     }
     input: {
         function f(n) {
@@ -21,7 +21,7 @@ function_iife_catch: {
 
 function_iife_catch_ie8: {
     mangle = {
-        ie8: true,
+        screw_ie8: false,
     }
     input: {
         function f(n) {
@@ -42,7 +42,7 @@ function_iife_catch_ie8: {
 
 function_catch_catch: {
     mangle = {
-        ie8: false,
+        screw_ie8: true,
     }
     input: {
         var o = 0;
@@ -70,7 +70,7 @@ function_catch_catch: {
 
 function_catch_catch_ie8: {
     mangle = {
-        ie8: true,
+        screw_ie8: false,
     }
     input: {
         var o = 0;

test/compress/issue-1750.js

@@ -7,7 +7,7 @@ case_1: {
     input: {
         var a = 0, b = 1;
         switch (true) {
-          case a || true:
+          case a, true:
           default:
             b = 2;
           case true:
@@ -17,7 +17,7 @@ case_1: {
     expect: {
         var a = 0, b = 1;
         switch (true) {
-          case a || true:
+          case a, true:
             b = 2;
         }
         console.log(a, b);

test/compress/issue-1770.js

@@ -1,7 +1,5 @@
 mangle_props: {
-    mangle = {
-        properties: true,
-    }
+    mangle_props = {}
     input: {
         var obj = {
             undefined: 1,
@@ -56,12 +54,10 @@ mangle_props: {
 }
 
 numeric_literal: {
-    mangle = {
-        properties: true,
-    }
     beautify = {
         beautify: true,
     }
+    mangle_props = {}
     input: {
         var obj = {
             0: 0,
@@ -86,7 +82,7 @@ numeric_literal: {
         '    42: 2,',
         '    "42": 3,',
         '    37: 4,',
-        '    o: 5,',
+        '    a: 5,',
         '    1e42: 6,',
         '    b: 7,',
         '    "1e+42": 8',
@@ -96,7 +92,7 @@ numeric_literal: {
         '',
         'console.log(obj[42], obj["42"]);',
         '',
-        'console.log(obj[37], obj["o"], obj[37], obj["37"]);',
+        'console.log(obj[37], obj["a"], obj[37], obj["37"]);',
         '',
         'console.log(obj[1e42], obj["b"], obj["1e+42"]);',
     ]
@@ -109,9 +105,7 @@ numeric_literal: {
 }
 
 identifier: {
-    mangle = {
-        properties: true,
-    }
+    mangle_props = {}
     input: {
         var obj = {
             abstract: 1,
@@ -179,32 +173,32 @@ identifier: {
     }
     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: 1,
+            b: 2,
+            c: 3,
+            d: 4,
+            e: 5,
+            f: 6,
+            g: 7,
+            h: 8,
+            i: 9,
+            j: 10,
+            k: 11,
+            l: 12,
+            m: 13,
+            n: 14,
+            o: 15,
+            p: 16,
+            q: 17,
+            r: 18,
+            s: 19,
+            t: 20,
+            u: 21,
+            v: 22,
+            w: 23,
+            x: 24,
+            y: 25,
+            z: 26,
             A: 27,
             B: 28,
             C: 29,
@@ -235,11 +229,11 @@ identifier: {
             Z: 54,
             $: 55,
             _: 56,
-            ee: 57,
-            te: 58,
-            ne: 59,
-            ae: 60,
-            ie: 61,
+            aa: 57,
+            ba: 58,
+            ca: 59,
+            da: 60,
+            ea: 61,
         };
     }
 }

test/compress/issue-1787.js

@@ -1,8 +1,6 @@
 unary_prefix: {
     options = {
         evaluate: true,
-        inline: true,
-        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -12,6 +10,10 @@ unary_prefix: {
             return x;
         }());
     }
-    expect_exact: "console.log(-2/3);"
+    expect: {
+        console.log(function() {
+            return -2 / 3;
+        }());
+    }
     expect_stdout: true
 }

test/compress/issue-1833.js

@@ -1,7 +1,6 @@
 iife_for: {
     options = {
         negate_iife: true,
-        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -27,7 +26,6 @@ iife_for: {
 iife_for_in: {
     options = {
         negate_iife: true,
-        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -53,7 +51,6 @@ iife_for_in: {
 iife_do: {
     options = {
         negate_iife: true,
-        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -83,7 +80,6 @@ iife_do: {
 iife_while: {
     options = {
         negate_iife: true,
-        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -134,5 +130,5 @@ label_while: {
             L: while (0) continue L;
         }
     }
-    expect_exact: "function f(){L:0}"
+    expect_exact: "function f(){L:;}"
 }

test/compress/issue-208.js

@@ -38,7 +38,7 @@ mixed: {
         }
     }
     input: {
-        var ENV = 3;
+        const ENV = 3;
         var FOO = 4;
         f(ENV * 10);
         --FOO;
@@ -49,7 +49,7 @@ mixed: {
         x = DEBUG;
     }
     expect: {
-        var ENV = 3;
+        const 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:41,12]',
+        'WARN: global_defs ENV redefined [test/compress/issue-208.js:41,14]',
         '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-2652.js

@@ -1,33 +0,0 @@
-insert_semicolon: {
-    beautify = {
-        beautify: true,
-        comments: "all",
-    }
-    input: {
-        var a
-        /* foo */ var b
-    }
-    expect_exact: [
-        "var a",
-        "/* foo */;",
-        "",
-        "var b;",
-    ]
-}
-
-unary_postfix: {
-    beautify = {
-        beautify: true,
-        comments: "all",
-    }
-    input: {
-        a
-        /* foo */++b
-    }
-    expect_exact: [
-        "a",
-        "/* foo */;",
-        "",
-        "++b;",
-    ]
-}

test/compress/issue-281.js

@@ -1,498 +0,0 @@
-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 = {
-        collapse_vars: 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 = {
-        collapse_vars: 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-368.js

@@ -1,6 +1,6 @@
 collapse: {
     options = {
-        collapse_vars: true,
+        cascade: true,
         sequences: true,
         side_effects: true,
         unused: true,
@@ -41,7 +41,7 @@ collapse: {
             return void 0 !== ('function' === typeof b ? b() : b) && c();
         }
         function f2(b) {
-            return 'stirng' == typeof ('function' === typeof (b = c()) ? b() : b) && d();
+            return b = c(), 'stirng' == typeof ('function' === typeof b ? b() : b) && d();
         }
         function f3(c) {
             var a;

test/compress/issue-637.js

@@ -17,6 +17,6 @@ wrongly_optimized: {
             foo();
         }
         // TODO: optimize to `func(), bar()`
-        (func(), 1) && bar();
+        (func(), 0) || bar();
     }
 }

test/compress/issue-640.js

@@ -100,7 +100,7 @@ wrongly_optimized: {
             foo();
         }
         // TODO: optimize to `func(), bar()`
-        if (func(), 1) bar();
+        if (func(), !0) bar();
     }
 }
 
@@ -159,7 +159,7 @@ negate_iife_4: {
         })();
     }
     expect: {
-        !function(){ return t }() ? console.log(false) : console.log(true), function(){
+        (function(){ return t })() ? console.log(true) : console.log(false), function(){
             console.log("something");
         }();
     }
@@ -183,7 +183,7 @@ negate_iife_5: {
         })();
     }
     expect: {
-        !function(){ return t }() ? bar(false) : foo(true), function(){
+        (function(){ return t })() ? foo(true) : bar(false), function(){
             console.log("something");
         }();
     }
@@ -207,7 +207,7 @@ negate_iife_5_off: {
         })();
     }
     expect: {
-        !function(){ return t }() ? bar(false) : foo(true), function(){
+        (function(){ return t })() ? foo(true) : bar(false), function(){
             console.log("something");
         }();
     }

test/compress/issue-747.js

@@ -1,45 +1,37 @@
 dont_reuse_prop: {
-    mangle = {
-        properties: {
-            regex: /asd/,
-        },
-    }
+    mangle_props = {
+        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 = {
-        properties: {
-            regex: /asd/,
-        },
-    }
+    mangle_props = {
+        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-892.js

@@ -18,6 +18,7 @@ dont_mangle_arguments: {
         hoist_vars    : true,
         if_return     : true,
         join_vars     : true,
+        cascade       : true,
         side_effects  : true,
         negate_iife   : false
     };

test/compress/issue-973.js

@@ -1,8 +1,7 @@
 this_binding_conditionals: {
     options = {
         conditionals: true,
-        evaluate: true,
-        side_effects: true,
+        evaluate    : true
     };
     input: {
         (1 && a)();
@@ -52,7 +51,6 @@ this_binding_collapse_vars: {
     options = {
         collapse_vars: true,
         toplevel: true,
-        unused: true,
     };
     input: {
         var c = a; c();

test/compress/issue-976.js

@@ -2,7 +2,7 @@ eval_collapse_vars: {
     options = {
         collapse_vars:true, sequences:false, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, side_effects:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true
     };
     input: {
         function f1() {

test/compress/issue-979.js

@@ -2,7 +2,7 @@ issue979_reported: {
     options = {
         sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, side_effects:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true
     }
     input: {
         function f1() {
@@ -32,7 +32,7 @@ issue979_test_negated_is_best: {
     options = {
         sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, side_effects:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true
     }
     input: {
         function f3() {

test/compress/loops.js

@@ -146,13 +146,55 @@ 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,
         dead_code: true,
         evaluate: true,
-        loops: true,
-        passes: 2,
-        side_effects: true,
     };
     input: {
         while (true) {
@@ -203,7 +245,7 @@ issue_1532: {
 issue_186: {
     beautify = {
         beautify: false,
-        ie8: false,
+        screw_ie8: true,
     }
     input: {
         var x = 3;
@@ -222,7 +264,7 @@ issue_186: {
 issue_186_ie8: {
     beautify = {
         beautify: false,
-        ie8: true,
+        screw_ie8: false,
     }
     input: {
         var x = 3;
@@ -241,7 +283,7 @@ issue_186_ie8: {
 issue_186_beautify: {
     beautify = {
         beautify: true,
-        ie8: false,
+        screw_ie8: true,
     }
     input: {
         var x = 3;
@@ -268,7 +310,7 @@ issue_186_beautify: {
 issue_186_beautify_ie8: {
     beautify = {
         beautify: true,
-        ie8: true,
+        screw_ie8: false,
     }
     input: {
         var x = 3;
@@ -298,7 +340,7 @@ issue_186_bracketize: {
     beautify = {
         beautify: false,
         bracketize: true,
-        ie8: false,
+        screw_ie8: true,
     }
     input: {
         var x = 3;
@@ -318,7 +360,7 @@ issue_186_bracketize_ie8: {
     beautify = {
         beautify: false,
         bracketize: true,
-        ie8: true,
+        screw_ie8: false,
     }
     input: {
         var x = 3;
@@ -338,7 +380,7 @@ issue_186_beautify_bracketize: {
     beautify = {
         beautify: true,
         bracketize: true,
-        ie8: false,
+        screw_ie8: true,
     }
     input: {
         var x = 3;
@@ -370,7 +412,7 @@ issue_186_beautify_bracketize_ie8: {
     beautify = {
         beautify: true,
         bracketize: true,
-        ie8: true,
+        screw_ie8: false,
     }
     input: {
         var x = 3;
@@ -438,57 +480,3 @@ do_switch: {
         } 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;);'
-}
-
-init_side_effects: {
-    options = {
-        loops: true,
-        side_effects: true,
-    };
-    input: {
-        for (function() {}(), i = 0; i < 5; i++) console.log(i);
-        for (function() {}(); i < 10; i++) console.log(i);
-    }
-    expect: {
-        for (i = 0; i < 5; i++) console.log(i);
-        for (; i < 10; i++) console.log(i);
-    }
-    expect_stdout: true
-}
-
-dead_code_condition: {
-    options = {
-        dead_code: true,
-        evaluate: true,
-        loops: true,
-        sequences: true,
-    }
-    input: {
-        for (var a = 0, b = 5; (a += 1, 3) - 3 && b > 0; b--) {
-            var c = function() {
-                b--;
-            }(a++);
-        }
-        console.log(a);
-    }
-    expect: {
-        var c;
-        var a = 0, b = 5;
-        a += 1, 0,
-        console.log(a);
-    }
-    expect_stdout: "1"
-}

test/compress/negate-iife.js

@@ -22,25 +22,27 @@ negate_iife_1_off: {
 
 negate_iife_2: {
     options = {
-        inline: true,
-        negate_iife: 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: {
@@ -60,7 +62,6 @@ negate_iife_3_evaluate: {
     options = {
         conditionals: true,
         evaluate: true,
-        inline: true,
         negate_iife: true,
     }
     input: {
@@ -103,7 +104,6 @@ negate_iife_3_off_evaluate: {
     options = {
         conditionals: true,
         evaluate: true,
-        inline: true,
         negate_iife: false,
     }
     input: {

test/compress/new.js

@@ -82,19 +82,3 @@ 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

@@ -1,38 +0,0 @@
-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/properties.js

@@ -1,8 +1,7 @@
 keep_properties: {
     options = {
-        evaluate: true,
-        properties: false,
-    }
+        properties: false
+    };
     input: {
         a["foo"] = "bar";
     }
@@ -13,12 +12,9 @@ keep_properties: {
 
 dot_properties: {
     options = {
-        evaluate: true,
         properties: true,
-    }
-    beautify = {
-        ie8: true,
-    }
+        screw_ie8: false
+    };
     input: {
         a["foo"] = "bar";
         a["if"] = "if";
@@ -39,12 +35,9 @@ dot_properties: {
 
 dot_properties_es5: {
     options = {
-        evaluate: true,
         properties: true,
-    }
-    beautify = {
-        ie8: false,
-    }
+        screw_ie8: true
+    };
     input: {
         a["foo"] = "bar";
         a["if"] = "if";
@@ -64,8 +57,8 @@ dot_properties_es5: {
 sub_properties: {
     options = {
         evaluate: true,
-        properties: true,
-    }
+        properties: true
+    };
     input: {
         a[0] = 0;
         a["0"] = 1;
@@ -84,18 +77,18 @@ sub_properties: {
         a[3.14] = 3;
         a.if = 4;
         a["foo bar"] = 5;
-        a.NaN = 6;
-        a.null = 7;
+        a[NaN] = 6;
+        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"];
@@ -112,10 +105,10 @@ evaluate_array_length: {
 
 evaluate_string_length: {
     options = {
-        evaluate: true,
         properties: true,
         unsafe: true,
-    }
+        evaluate: true
+    };
     input: {
         a = "foo".length;
         a = ("foo" + "bar")["len" + "gth"];
@@ -131,11 +124,9 @@ evaluate_string_length: {
 }
 
 mangle_properties: {
-    mangle = {
-        properties: {
-            keep_quoted: false,
-        },
-    }
+    mangle_props = {
+        ignore_quoted: false
+    };
     input: {
         a["foo"] = "bar";
         a.color = "red";
@@ -146,21 +137,18 @@ mangle_properties: {
     expect: {
         a["a"] = "bar";
         a.b = "red";
-        x = {o: 10};
-        a.r(x.o, a.a);
-        a['r']({b: "blue", a: "baz"});
+        x = {c: 10};
+        a.d(x.c, a.a);
+        a['d']({b: "blue", a: "baz"});
     }
 }
 
 mangle_unquoted_properties: {
     options = {
-        evaluate: true,
-        properties: false,
+        properties: false
     }
-    mangle = {
-        properties: {
-            keep_quoted: true,
-        },
+    mangle_props = {
+        ignore_quoted: true
     }
     beautify = {
         beautify: false,
@@ -189,26 +177,24 @@ mangle_unquoted_properties: {
         function f1() {
             a["foo"] = "bar";
             a.color = "red";
-            a.r = 2;
-            x = {"bar": 10, b: 7};
-            a.b = 9;
+            a.b = 2;
+            x = {"bar": 10, c: 7};
+            a.c = 9;
         }
         function f2() {
             a.foo = "bar";
             a['color'] = "red";
-            x = {bar: 10, b: 7};
-            a.b = 9;
-            a.r = 3;
+            x = {bar: 10, c: 7};
+            a.c = 9;
+            a.b = 3;
         }
     }
 }
 
 mangle_debug: {
-    mangle = {
-        properties: {
-            debug: "",
-        },
-    }
+    mangle_props = {
+        debug: ""
+    };
     input: {
         a.foo = "bar";
         x = { baz: "ban" };
@@ -220,11 +206,9 @@ mangle_debug: {
 }
 
 mangle_debug_true: {
-    mangle = {
-        properties: {
-            debug: true,
-        },
-    }
+    mangle_props = {
+        debug: true
+    };
     input: {
         a.foo = "bar";
         x = { baz: "ban" };
@@ -236,11 +220,9 @@ mangle_debug_true: {
 }
 
 mangle_debug_suffix: {
-    mangle = {
-        properties: {
-            debug: "XYZ",
-        },
-    }
+    mangle_props = {
+        debug: "XYZ"
+    };
     input: {
         a.foo = "bar";
         x = { baz: "ban" };
@@ -251,17 +233,14 @@ mangle_debug_suffix: {
     }
 }
 
-mangle_debug_suffix_keep_quoted: {
+mangle_debug_suffix_ignore_quoted: {
     options = {
-        evaluate: true,
-        properties: false,
+        properties: false
     }
-    mangle = {
-        properties: {
-            debug: "XYZ",
-            keep_quoted: true,
-            reserved: [],
-        },
+    mangle_props = {
+        ignore_quoted: true,
+        debug: "XYZ",
+        reserved: []
     }
     beautify = {
         beautify: false,
@@ -576,521 +555,3 @@ 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);
-    }
-}
-
-issue_2513: {
-    options = {
-        evaluate: true,
-        properties: true,
-    }
-    input: {
-        !function(Infinity, NaN, undefined) {
-            console.log("a"[1/0], "b"["Infinity"]);
-            console.log("c"[0/0], "d"["NaN"]);
-            console.log("e"[void 0], "f"["undefined"]);
-        }(0, 0, 0);
-    }
-    expect: {
-        !function(Infinity, NaN, undefined) {
-            console.log("a"[1/0], "b"[1/0]);
-            console.log("c".NaN, "d".NaN);
-            console.log("e"[void 0], "f"[void 0]);
-        }(0, 0, 0);
-    }
-    expect_stdout: [
-        "undefined undefined",
-        "undefined undefined",
-        "undefined undefined",
-    ]
-}
-
-const_prop_assign_strict: {
-    options = {
-        pure_getters: "strict",
-        side_effects: true,
-    }
-    input: {
-        function Simulator() {
-            /abc/.index = 1;
-            this._aircraft = [];
-        }
-        (function() {}).prototype.destroy = x();
-    }
-    expect: {
-        function Simulator() {
-            this._aircraft = [];
-        }
-        x();
-    }
-}
-
-const_prop_assign_pure: {
-    options = {
-        pure_getters: true,
-        side_effects: true,
-    }
-    input: {
-        function Simulator() {
-            /abc/.index = 1;
-            this._aircraft = [];
-        }
-        (function() {}).prototype.destroy = x();
-    }
-    expect: {
-        function Simulator() {
-            this._aircraft = [];
-        }
-        x();
-    }
-}

test/compress/pure_funcs.js

@@ -293,124 +293,3 @@ unary: {
         bar();
     }
 }
-
-issue_2629_1: {
-    options = {
-        side_effects: true,
-    }
-    beautify = {
-        comments: "all",
-    }
-    input: {
-        /*@__PURE__*/ a();
-        /*@__PURE__*/ (b());
-        (/*@__PURE__*/ c)();
-        (/*@__PURE__*/ d());
-    }
-    expect_exact: [
-        "/* */c();",
-    ]
-}
-
-issue_2629_2: {
-    options = {
-        side_effects: true,
-    }
-    beautify = {
-        comments: "all",
-    }
-    input: {
-        /*@__PURE__*/ a(1)(2)(3);
-        /*@__PURE__*/ (b(1))(2)(3);
-        /*@__PURE__*/ (c(1)(2))(3);
-        /*@__PURE__*/ (d(1)(2)(3));
-        (/*@__PURE__*/ e)(1)(2)(3);
-        (/*@__PURE__*/ f(1))(2)(3);
-        (/*@__PURE__*/ g(1)(2))(3);
-        (/*@__PURE__*/ h(1)(2)(3));
-    }
-    expect_exact: [
-        "/* */e(1)(2)(3);",
-        "/* */f(1)(2)(3);",
-        "/* */g(1)(2)(3);",
-    ]
-}
-
-issue_2629_3: {
-    options = {
-        side_effects: true,
-    }
-    beautify = {
-        comments: "all",
-    }
-    input: {
-        /*@__PURE__*/ a.x(1).y(2).z(3);
-        /*@__PURE__*/ (b.x)(1).y(2).z(3);
-        /*@__PURE__*/ (c.x(1)).y(2).z(3);
-        /*@__PURE__*/ (d.x(1).y)(2).z(3);
-        /*@__PURE__*/ (e.x(1).y(2)).z(3);
-        /*@__PURE__*/ (f.x(1).y(2).z)(3);
-        /*@__PURE__*/ (g.x(1).y(2).z(3));
-        (/*@__PURE__*/ h).x(1).y(2).z(3);
-        (/*@__PURE__*/ i.x)(1).y(2).z(3);
-        (/*@__PURE__*/ j.x(1)).y(2).z(3);
-        (/*@__PURE__*/ k.x(1).y)(2).z(3);
-        (/*@__PURE__*/ l.x(1).y(2)).z(3);
-        (/*@__PURE__*/ m.x(1).y(2).z)(3);
-        (/*@__PURE__*/ n.x(1).y(2).z(3));
-    }
-    expect_exact: [
-        "/* */h.x(1).y(2).z(3);",
-        "/* */i.x(1).y(2).z(3);",
-        "/* */j.x(1).y(2).z(3);",
-        "/* */k.x(1).y(2).z(3);",
-        "/* */l.x(1).y(2).z(3);",
-        "/* */m.x(1).y(2).z(3);",
-    ]
-}
-
-issue_2629_4: {
-    options = {
-        side_effects: true,
-    }
-    input: {
-        (/*@__PURE__*/ x(), y());
-        (w(), /*@__PURE__*/ x(), y());
-    }
-    expect: {
-        y();
-        w(), y();
-    }
-}
-
-issue_2629_5: {
-    options = {
-        side_effects: true,
-    }
-    input: {
-        [ /*@__PURE__*/ x() ];
-        [ /*@__PURE__*/ x(), y() ];
-        [ w(), /*@__PURE__*/ x(), y() ];
-    }
-    expect: {
-        y();
-        w(), y();
-    }
-}
-
-issue_2638: {
-    options = {
-        side_effects: true,
-    }
-    beautify = {
-        comments: "all",
-    }
-    input: {
-        /*@__PURE__*/(g() || h())(x(), y());
-        (/*@__PURE__*/ (a() || b()))(c(), d());
-    }
-    expect_exact: [
-        "/* */x(),y();",
-        "/* */(a()||b())(c(),d());",
-    ]
-}

test/compress/pure_getters.js

@@ -1,7 +1,6 @@
 strict: {
     options = {
         pure_getters: "strict",
-        reduce_funcs: false,
         reduce_vars: false,
         side_effects: true,
         toplevel: true,
@@ -31,7 +30,6 @@ strict: {
 strict_reduce_vars: {
     options = {
         pure_getters: "strict",
-        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         toplevel: true,
@@ -60,7 +58,6 @@ strict_reduce_vars: {
 unsafe: {
     options = {
         pure_getters: true,
-        reduce_funcs: false,
         reduce_vars: false,
         side_effects: true,
         toplevel: true,
@@ -87,7 +84,6 @@ unsafe: {
 unsafe_reduce_vars: {
     options = {
         pure_getters: true,
-        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         toplevel: true,
@@ -182,432 +178,3 @@ impure_getter_2: {
     }
     expect: {}
 }
-
-issue_2110_1: {
-    options = {
-        collapse_vars: 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 = {
-        collapse_vars: 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 = {
-        collapse_vars: 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 = {
-        collapse_vars: 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 = {
-        collapse_vars: 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 = {
-        collapse_vars: 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/rename.js

@@ -1,536 +0,0 @@
-mangle_catch: {
-    rename = true
-    options = {
-        ie8: false,
-        toplevel: false,
-    }
-    mangle = {
-        ie8: false,
-        toplevel: false,
-    }
-    input: {
-        var a = "FAIL";
-        try {
-            throw 1;
-        } catch (args) {
-            a = "PASS";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var a="FAIL";try{throw 1}catch(o){a="PASS"}console.log(a);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_ie8: {
-    rename = true
-    options = {
-        ie8: true,
-        toplevel: false,
-    }
-    mangle = {
-        ie8: true,
-        toplevel: false,
-    }
-    input: {
-        var a = "FAIL";
-        try {
-            throw 1;
-        } catch (args) {
-            a = "PASS";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var a="FAIL";try{throw 1}catch(args){a="PASS"}console.log(a);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_var: {
-    rename = true
-    options = {
-        ie8: false,
-        toplevel: false,
-    }
-    mangle = {
-        ie8: false,
-        toplevel: false,
-    }
-    input: {
-        var a = "FAIL";
-        try {
-            throw 1;
-        } catch (args) {
-            var a = "PASS";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var a="FAIL";try{throw 1}catch(o){var a="PASS"}console.log(a);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_var_ie8: {
-    rename = true
-    options = {
-        ie8: true,
-        toplevel: false,
-    }
-    mangle = {
-        ie8: true,
-        toplevel: false,
-    }
-    input: {
-        var a = "FAIL";
-        try {
-            throw 1;
-        } catch (args) {
-            var a = "PASS";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var a="FAIL";try{throw 1}catch(args){var a="PASS"}console.log(a);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_toplevel: {
-    rename = true
-    options = {
-        ie8: false,
-        toplevel: true,
-    }
-    mangle = {
-        ie8: false,
-        toplevel: true,
-    }
-    input: {
-        var a = "FAIL";
-        try {
-            throw 1;
-        } catch (args) {
-            a = "PASS";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var o="FAIL";try{throw 1}catch(c){o="PASS"}console.log(o);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_ie8_toplevel: {
-    rename = true
-    options = {
-        ie8: true,
-        toplevel: true,
-    }
-    mangle = {
-        ie8: true,
-        toplevel: true,
-    }
-    input: {
-        var a = "FAIL";
-        try {
-            throw 1;
-        } catch (args) {
-            a = "PASS";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var o="FAIL";try{throw 1}catch(c){o="PASS"}console.log(o);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_var_toplevel: {
-    rename = true
-    options = {
-        ie8: false,
-        toplevel: true,
-    }
-    mangle = {
-        ie8: false,
-        toplevel: true,
-    }
-    input: {
-        var a = "FAIL";
-        try {
-            throw 1;
-        } catch (args) {
-            var a = "PASS";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var o="FAIL";try{throw 1}catch(r){var o="PASS"}console.log(o);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_var_ie8_toplevel: {
-    rename = true
-    options = {
-        ie8: true,
-        toplevel: true,
-    }
-    mangle = {
-        ie8: true,
-        toplevel: true,
-    }
-    input: {
-        var a = "FAIL";
-        try {
-            throw 1;
-        } catch (args) {
-            var a = "PASS";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var o="FAIL";try{throw 1}catch(r){var o="PASS"}console.log(o);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_redef_1: {
-    rename = true
-    options = {
-        ie8: false,
-        toplevel: false,
-    }
-    mangle = {
-        ie8: false,
-        toplevel: false,
-    }
-    input: {
-        var a = "PASS";
-        try {
-            throw "FAIL1";
-        } catch (a) {
-            var a = "FAIL2";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var a="PASS";try{throw"FAIL1"}catch(a){var a="FAIL2"}console.log(a);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_redef_1_ie8: {
-    rename = true
-    options = {
-        ie8: true,
-        toplevel: false,
-    }
-    mangle = {
-        ie8: true,
-        toplevel: false,
-    }
-    input: {
-        var a = "PASS";
-        try {
-            throw "FAIL1";
-        } catch (a) {
-            var a = "FAIL2";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var a="PASS";try{throw"FAIL1"}catch(a){var a="FAIL2"}console.log(a);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_redef_1_toplevel: {
-    rename = true
-    options = {
-        ie8: false,
-        toplevel: true,
-    }
-    mangle = {
-        ie8: false,
-        toplevel: true,
-    }
-    input: {
-        var a = "PASS";
-        try {
-            throw "FAIL1";
-        } catch (a) {
-            var a = "FAIL2";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var o="PASS";try{throw"FAIL1"}catch(o){var o="FAIL2"}console.log(o);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_redef_1_ie8_toplevel: {
-    rename = true
-    options = {
-        ie8: true,
-        toplevel: true,
-    }
-    mangle = {
-        ie8: true,
-        toplevel: true,
-    }
-    input: {
-        var a = "PASS";
-        try {
-            throw "FAIL1";
-        } catch (a) {
-            var a = "FAIL2";
-        }
-        console.log(a);
-    }
-    expect_exact: 'var o="PASS";try{throw"FAIL1"}catch(o){var o="FAIL2"}console.log(o);'
-    expect_stdout: "PASS"
-}
-
-mangle_catch_redef_2: {
-    rename = true
-    options = {
-        ie8: false,
-        toplevel: false,
-    }
-    mangle = {
-        ie8: false,
-        toplevel: false,
-    }
-    input: {
-        try {
-            throw "FAIL1";
-        } catch (a) {
-            var a = "FAIL2";
-        }
-        console.log(a);
-    }
-    expect_exact: 'try{throw"FAIL1"}catch(a){var a="FAIL2"}console.log(a);'
-    expect_stdout: "undefined"
-}
-
-mangle_catch_redef_2_ie8: {
-    rename = true
-    options = {
-        ie8: true,
-        toplevel: false,
-    }
-    mangle = {
-        ie8: true,
-        toplevel: false,
-    }
-    input: {
-        try {
-            throw "FAIL1";
-        } catch (a) {
-            var a = "FAIL2";
-        }
-        console.log(a);
-    }
-    expect_exact: 'try{throw"FAIL1"}catch(a){var a="FAIL2"}console.log(a);'
-    expect_stdout: "undefined"
-}
-
-mangle_catch_redef_2_toplevel: {
-    rename = true
-    options = {
-        ie8: false,
-        toplevel: true,
-    }
-    mangle = {
-        ie8: false,
-        toplevel: true,
-    }
-    input: {
-        try {
-            throw "FAIL1";
-        } catch (a) {
-            var a = "FAIL2";
-        }
-        console.log(a);
-    }
-    expect_exact: 'try{throw"FAIL1"}catch(o){var o="FAIL2"}console.log(o);'
-    expect_stdout: "undefined"
-}
-
-mangle_catch_redef_2_ie8_toplevel: {
-    rename = true
-    options = {
-        ie8: true,
-        toplevel: true,
-    }
-    mangle = {
-        ie8: true,
-        toplevel: true,
-    }
-    input: {
-        try {
-            throw "FAIL1";
-        } catch (a) {
-            var a = "FAIL2";
-        }
-        console.log(a);
-    }
-    expect_exact: 'try{throw"FAIL1"}catch(o){var o="FAIL2"}console.log(o);'
-    expect_stdout: "undefined"
-}
-
-issue_2120_1: {
-    rename = true
-    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: {
-    rename = true
-    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"
-}
-function_iife_catch: {
-    rename = true
-    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: {
-    rename = true
-    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: {
-    rename = true
-    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: {
-    rename = true
-    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/return_undefined.js

@@ -17,6 +17,7 @@ return_undefined: {
         keep_fnames   : false,
         hoist_vars    : true,
         join_vars     : true,
+        cascade       : true,
         negate_iife   : true
     };
     input: {
@@ -121,25 +122,3 @@ return_undefined: {
         }
     }
 }
-
-return_void: {
-    options = {
-        if_return: true,
-        inline: true,
-        reduce_vars: true,
-        unused: true,
-    }
-    input: {
-        function f() {
-            function g() {
-                h();
-            }
-            return g();
-        }
-    }
-    expect: {
-        function f() {
-            h();
-        }
-    }
-}

test/compress/sandbox.js

@@ -1,14 +0,0 @@
-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 = {
-        ie8: false,
+        screw_ie8: true,
     }
     beautify = {
-        ie8: false,
+        screw_ie8: true,
         ascii_only: true,
     }
     input: {
@@ -14,10 +14,10 @@ do_screw: {
 
 dont_screw: {
     options = {
-        ie8: true,
+        screw_ie8: false,
     }
     beautify = {
-        ie8: true,
+        screw_ie8: false,
         ascii_only: true,
     }
     input: {
@@ -28,7 +28,7 @@ dont_screw: {
 
 do_screw_constants: {
     options = {
-        ie8: false,
+        screw_ie8: true,
     }
     input: {
         f(undefined, Infinity);
@@ -38,7 +38,7 @@ do_screw_constants: {
 
 dont_screw_constants: {
     options = {
-        ie8: true,
+        screw_ie8: false,
     }
     input: {
         f(undefined, Infinity);
@@ -47,15 +47,9 @@ dont_screw_constants: {
 }
 
 do_screw_try_catch: {
-    options = {
-        ie8: false,
-    }
-    mangle = {
-        ie8: false,
-    }
-    beautify = {
-        ie8: false,
-    }
+    options = { screw_ie8: true };
+    mangle = { screw_ie8: true };
+    beautify = { screw_ie8: true };
     input: {
         good = function(e){
             return function(error){
@@ -81,15 +75,9 @@ do_screw_try_catch: {
 }
 
 dont_screw_try_catch: {
-    options = {
-        ie8: true,
-    }
-    mangle = {
-        ie8: true,
-    }
-    beautify = {
-        ie8: true,
-    }
+    options = { screw_ie8: false };
+    mangle = { screw_ie8: false };
+    beautify = { screw_ie8: false };
     input: {
         bad = function(e){
             return function(error){
@@ -115,15 +103,9 @@ dont_screw_try_catch: {
 }
 
 do_screw_try_catch_undefined: {
-    options = {
-        ie8: false,
-    }
-    mangle = {
-        ie8: false,
-    }
-    beautify = {
-        ie8: false,
-    }
+    options = { screw_ie8: true };
+    mangle = { screw_ie8: true };
+    beautify = { screw_ie8: true };
     input: {
         function a(b){
             try {
@@ -150,15 +132,9 @@ do_screw_try_catch_undefined: {
 }
 
 dont_screw_try_catch_undefined: {
-    options = {
-        ie8: true,
-    }
-    mangle = {
-        ie8: true,
-    }
-    beautify = {
-        ie8: true,
-    }
+    options = { screw_ie8: false };
+    mangle = { screw_ie8: false };
+    beautify = { screw_ie8: false };
     input: {
         function a(b){
             try {
@@ -187,13 +163,12 @@ dont_screw_try_catch_undefined: {
 reduce_vars: {
     options = {
         evaluate: true,
-        reduce_funcs: true,
         reduce_vars: true,
-        ie8: true,
+        screw_ie8: false,
         unused: true,
     }
     mangle = {
-        ie8: true,
+        screw_ie8: false,
     }
     input: {
         function f() {
@@ -221,10 +196,10 @@ reduce_vars: {
 
 issue_1586_1: {
     options = {
-        ie8: true,
+        screw_ie8: false,
     }
     mangle = {
-        ie8: true,
+        screw_ie8: false,
     }
     input: {
         function f() {
@@ -240,10 +215,10 @@ issue_1586_1: {
 
 issue_1586_2: {
     options = {
-        ie8: false,
+        screw_ie8: true,
     }
     mangle = {
-        ie8: false,
+        screw_ie8: true,
     }
     input: {
         function f() {
@@ -256,139 +231,3 @@ issue_1586_2: {
     }
     expect_exact: "function f(){try{x()}catch(c){console.log(c.message)}}"
 }
-
-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

@@ -176,11 +176,6 @@ for_sequences: {
         // 4
         x = (foo in bar);
         for (y = 5; false;);
-        // 5
-        x = function() {
-            foo in bar;
-        };
-        for (y = 5; false;);
     }
     expect: {
         // 1
@@ -193,10 +188,6 @@ for_sequences: {
         // 4
         x = (foo in bar);
         for (y = 5; false;);
-        // 5
-        for (x = function() {
-            foo in bar;
-        }, y = 5; false;);
     }
 }
 
@@ -252,12 +243,13 @@ negate_iife_for: {
     input: {
         (function() {})();
         for (i = 0; i < 5; i++) console.log(i);
+
         (function() {})();
-        for (; i < 10; i++) console.log(i);
+        for (; i < 5; i++) console.log(i);
     }
     expect: {
         for (!function() {}(), i = 0; i < 5; i++) console.log(i);
-        for (!function() {}(); i < 10; i++) console.log(i);
+        for (function() {}(); i < 5; i++) console.log(i);
     }
     expect_stdout: true
 }
@@ -317,7 +309,7 @@ unsafe_undefined: {
 
 issue_1685: {
     options = {
-        collapse_vars: true,
+        cascade: true,
         side_effects: true,
     }
     input: {
@@ -341,7 +333,7 @@ issue_1685: {
 
 func_def_1: {
     options = {
-        collapse_vars: true,
+        cascade: true,
         side_effects: true,
     }
     input: {
@@ -361,7 +353,7 @@ func_def_1: {
 
 func_def_2: {
     options = {
-        collapse_vars: true,
+        cascade: true,
         side_effects: true,
     }
     input: {
@@ -379,7 +371,7 @@ func_def_2: {
 
 func_def_3: {
     options = {
-        collapse_vars: true,
+        cascade: true,
         side_effects: true,
     }
     input: {
@@ -401,7 +393,7 @@ func_def_3: {
 
 func_def_4: {
     options = {
-        collapse_vars: true,
+        cascade: true,
         side_effects: true,
     }
     input: {
@@ -427,7 +419,7 @@ func_def_4: {
 
 func_def_5: {
     options = {
-        collapse_vars: true,
+        cascade: true,
         side_effects: true,
     }
     input: {
@@ -468,7 +460,7 @@ issue_1758: {
         console.log(function(c) {
             var undefined = 42;
             return function() {
-                return c--, c--, void c.toString();
+                return c--, c--, c.toString(), void 0;
             }();
         }());
     }
@@ -489,12 +481,12 @@ delete_seq_1: {
         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);
+        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
 }
@@ -513,12 +505,12 @@ delete_seq_2: {
         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);
+        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
 }
@@ -538,12 +530,12 @@ delete_seq_3: {
         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);
+        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
 }
@@ -614,185 +606,31 @@ delete_seq_6: {
     }
     expect: {
         var a;
-        console.log(!0);
+        console.log((a, !0));
     }
     expect_stdout: true
 }
 
-side_effects: {
+reassign_const: {
     options = {
+        cascade: true,
         sequences: true,
         side_effects: true,
     }
     input: {
-        0, a(), 1, b(), 2, c(), 3;
+        function f() {
+            const a = 1;
+            a++;
+            return a;
+        }
+        console.log(f());
     }
     expect: {
-        a(), b(), c();
-    }
-}
-
-side_effects_cascade_1: {
-    options = {
-        collapse_vars: 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 = {
-        collapse_vars: 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 = {
-        collapse_vars: 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 = {
-        collapse_vars: 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,
-        collapse_vars: 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 = {
-        collapse_vars: 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"
-}
-
-cascade_assignment_in_return: {
-    options = {
-        collapse_vars: true,
-        unused: true,
-    }
-    input: {
-        function f(a, b) {
-            return a = x(), b(a);
-        }
-    }
-    expect: {
-        function f(a, b) {
-            return b(x());
-        }
+        function f() {
+            const a = 1;
+            return a++, a;
+        }
+        console.log(f());
     }
+    expect_stdout: true
 }

test/compress/string-literal.js

@@ -8,12 +8,3 @@ 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

@@ -714,7 +714,6 @@ issue_1705_2: {
     options = {
         dead_code: true,
         evaluate: true,
-        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         side_effects: true,
@@ -817,50 +816,3 @@ issue_1758: {
     }
     expect_stdout: "0 3"
 }
-
-issue_2535: {
-    options = {
-        evaluate: true,
-        dead_code: true,
-        switches: true,
-    }
-    input: {
-        switch(w(), 42) {
-            case 13: x();
-            case 42: y();
-            default: z();
-        }
-    }
-    expect: {
-        w(), 42;
-        42;
-        y();
-        z();
-    }
-}
-
-issue_1750: {
-    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;
-        true;
-        a, true;
-        b = 2;
-        console.log(a, b);
-    }
-    expect_stdout: "0 2"
-}

test/compress/transform.js

@@ -45,9 +45,9 @@ condition_evaluate: {
         if (void 0 == null);
     }
     expect: {
-        while (0);
-        for (; 1;);
-        if (1);
+        while (!1);
+        for (; !0;);
+        if (!0);
     }
 }
 
@@ -68,7 +68,6 @@ label_if_break: {
         conditionals: true,
         dead_code: true,
         evaluate: true,
-        side_effects: true,
     }
     input: {
         L: if (true) {

test/compress/typeof.js

@@ -1,7 +1,6 @@
 typeof_evaluation: {
     options = {
-        evaluate: true,
-        typeofs: true,
+        evaluate: true
     };
     input: {
         a = typeof 1;
@@ -45,7 +44,7 @@ typeof_in_boolean_context: {
         function f2() { return g(), "Yes"; }
         foo();
         console.log(1);
-        var a = !(console.log(2), 1);
+        var a = !(console.log(2), !0);
         foo();
     }
 }
@@ -58,83 +57,6 @@ issue_1668: {
         if (typeof bar);
     }
     expect: {
-        if (1);
+        if (!0);
     }
 }
-
-typeof_defun_1: {
-    options = {
-        evaluate: true,
-        inline: true,
-        passes: 2,
-        reduce_vars: true,
-        side_effects: true,
-        toplevel: true,
-        typeofs: true,
-        unused: true,
-    }
-    input: {
-        function f() {
-            console.log("YES");
-        }
-        function g() {
-            h = 42;
-            console.log("NOPE");
-        }
-        function h() {
-            console.log("YUP");
-        }
-        g = 42;
-        "function" == typeof f && f();
-        "function" == typeof g && g();
-        "function" == typeof h && h();
-    }
-    expect: {
-        function g() {
-            h = 42;
-            console.log("NOPE");
-        }
-        function h() {
-            console.log("YUP");
-        }
-        g = 42;
-        console.log("YES");
-        "function" == typeof g && g();
-        h();
-    }
-    expect_stdout: [
-        "YES",
-        "YUP",
-    ]
-}
-
-typeof_defun_2: {
-    options = {
-        evaluate: true,
-        reduce_vars: true,
-        toplevel: true,
-        typeofs: true,
-    }
-    input: {
-        var f = function() {
-            console.log(x);
-        };
-        var x = 0;
-        x++ < 2 && typeof f == "function" && f();
-        x++ < 2 && typeof f == "function" && f();
-        x++ < 2 && typeof f == "function" && f();
-    }
-    expect: {
-        var f = function() {
-            console.log(x);
-        };
-        var x = 0;
-        x++ < 2 && f();
-        x++ < 2 && f();
-        x++ < 2 && f();
-    }
-    expect_stdout: [
-        "1",
-        "2",
-    ]
-}

test/compress/unicode.js

@@ -15,50 +15,3 @@ 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");'
-}
-
-issue_2569: {
-    input: {
-        new RegExp("[\udc42-\udcaa\udd74-\udd96\ude45-\ude4f\udea3-\udecc]");
-    }
-    expect_exact: 'new RegExp("[\\udc42-\\udcaa\\udd74-\\udd96\\ude45-\\ude4f\\udea3-\\udecc]");'
-}

test/exports.js

@@ -1,14 +0,0 @@
-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

@@ -1,31 +0,0 @@
-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/delete.js

@@ -1,14 +0,0 @@
-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/for-in_1.js

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

test/input/invalid/for-in_2.js

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

test/input/invalid/function_1.js

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

test/input/invalid/function_2.js

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

test/input/invalid/function_3.js

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

test/input/invalid/try.js

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

test/input/invalid/var.js

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

test/input/issue-2082/sample.js

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

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

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

test/input/issue-2310/input.js

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

test/input/issue-505/input.js

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

test/input/issue-505/output.js

@@ -1,5 +0,0 @@
-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,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInN0ZGluIl0sIm5hbWVzIjpbImNvbnNvbGUiLCJsb2ciXSwibWFwcGluZ3MiOiJBQUErQyxJQUFyQyxXQUFnQkEsUUFBUUMsSUFBSSIsInNvdXJjZXNDb250ZW50IjpbImNsYXNzIEZvbyB7IGNvbnN0cnVjdG9yKCl7Y29uc29sZS5sb2coMSsyKTt9IH0gbmV3IEZvbygpO1xuIl19
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInN0ZGluIl0sIm5hbWVzIjpbImNvbnNvbGUiLCJsb2ciXSwibWFwcGluZ3MiOiJBQUErQyxHQUFyQyxZQUFnQkEsUUFBUUMsSUFBSSIsInNvdXJjZXNDb250ZW50IjpbImNsYXNzIEZvbyB7IGNvbnN0cnVjdG9yKCl7Y29uc29sZS5sb2coMSsyKTt9IH0gbmV3IEZvbygpO1xuIl19

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){
@@ -11,69 +11,45 @@ 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("-mcb", "beautify=false,webkit");
+        args.push("-mc", "warnings=false");
     }
-    args.push("--timings");
+    args.push("--stats");
     var child_process = require("child_process");
-    var fetch = require("./fetch");
+    try {
+        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 = site + request.url;
-        fetch(url, function(err, res) {
-            if (err) throw err;
-            response.writeHead(200, {
-                "Content-Type": {
-                    css: "text/css",
-                    js: "application/javascript",
-                    png: "image/png"
-                }[url.slice(url.lastIndexOf(".") + 1)] || "text/html; charset=utf-8"
-            });
-            if (/\.js$/.test(url)) {
-                var stderr = "";
-                var uglifyjs = child_process.fork("bin/uglifyjs", args, {
-                    silent: true
-                }).on("exit", function(code) {
-                    console.log("uglifyjs", url.slice(site.length + 1), args.join(" "));
-                    console.log(stderr);
-                    if (code) throw new Error("uglifyjs failed with code " + code);
-                });
-                uglifyjs.stderr.on("data", function(data) {
-                    stderr += data;
-                }).setEncoding("utf8");
-                uglifyjs.stdout.pipe(response);
-                res.pipe(uglifyjs.stdin);
-            } else {
-                res.pipe(response);
-            }
+        var url = decodeURIComponent(request.url.slice(1));
+        var stderr = "";
+        var uglifyjs = child_process.fork("bin/uglifyjs", args, {
+            silent: true
+        }).on("exit", function(code) {
+            console.log("uglifyjs", url.indexOf(site) == 0 ? url.slice(site.length) : url, args.join(" "));
+            console.log(stderr);
+            if (code) throw new Error("uglifyjs failed with code " + code);
+        });
+        uglifyjs.stderr.on("data", function(data) {
+            stderr += data;
+        }).setEncoding("utf8");
+        uglifyjs.stdout.pipe(response);
+        http.get(url, function(res) {
+            res.pipe(uglifyjs.stdin);
+        });
+    }).listen().on("listening", function() {
+        var phantomjs = require("phantomjs-prebuilt");
+        var program = phantomjs.exec(process.argv[1], server.address().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.");
         });
-    }).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 {
@@ -87,6 +63,10 @@ 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);
@@ -97,8 +77,8 @@ if (typeof phantom == "undefined") {
             phantom.exit();
         }
     };
-    page.open(url, function(status) {
-        if (status != "success") phantom.exit(1);
+    page.open(site, function(status) {
+        if (status != "success") phantomjs.exit(1);
         page.evaluate(function() {
             JetStream.switchToQuick();
             JetStream.start();