v3.4.1

fixes #3188

.github/ISSUE_TEMPLATE.md

@@ -2,10 +2,6 @@
 
 <!-- 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**
@@ -24,6 +20,6 @@
 **JavaScript output or error produced.**
 
 <!--
-    Note: `uglify-js` only supports ES5. 
-    Those wishing to minify ES6 should use `uglify-es`.
+    Note: `uglify-js` only supports JavaScript.
+    Those wishing to minify ES6+ should transpile first.
 -->

README.md

@@ -104,6 +104,8 @@ a double dash to prevent input files being used as option arguments:
                                 sequences.
     --config-file <file>        Read `minify()` options from JSON file.
     -d, --define <expr>[=value] Global definitions.
+    -e, --enclose [arg[:value]] Embed everything in a big function, with configurable
+                                argument(s) & value(s).
     --ie8                       Support non-standard Internet Explorer 8.
                                 Equivalent to setting `ie8: true` in `minify()`
                                 for `compress`, `mangle` and `output` options.
@@ -118,7 +120,8 @@ a double dash to prevent input files being used as option arguments:
                                            JS that was generated from some other original
                                            code. Specify "inline" if the source map is
                                            included within the sources.
-                                `filename`  Name and/or location of the output source.
+                                `filename`  Filename and/or location of the output source
+                                            (sets `file` attribute in source map).
                                 `includeSources`  Pass this flag if you want to include
                                                   the content of source files in the
                                                   source map as sourcesContent property.
@@ -149,7 +152,9 @@ debugging your compressed JavaScript.  To get a source map, pass
 
 Additional options:
 
-- `--source-map "filename='<NAME>'"` to specify the name of the source map.
+- `--source-map "filename='<NAME>'"` to specify the name of the source map. The value of
+  `filename` is only used to set `file` attribute (see [the spec][sm-spec])
+  in source map file.
 
 - `--source-map "root='<URL>'"` to pass the URL where the original files can be found.
 
@@ -685,7 +690,8 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
   pass `pure_funcs: [ 'Math.floor' ]` to let it know that this
   function won't produce any side effect, in which case the whole
   statement would get discarded.  The current implementation adds some
-  overhead (compression will be slower).
+  overhead (compression will be slower). Make sure symbols under `pure_funcs`
+  are also under `mangle.reserved` to avoid mangling.
 
 - `pure_getters` (default: `"strict"`) -- If you pass `true` for
   this, UglifyJS will assume that object property access
@@ -1040,8 +1046,9 @@ var result = UglifyJS.minify(ast, {
 ### Working with Uglify AST
 
 Transversal and transformation of the native AST can be performed through
-[`TreeWalker`](http://lisperator.net/uglifyjs/walk) and
-[`TreeTransformer`](http://lisperator.net/uglifyjs/transform) respectively.
+[`TreeWalker`](https://github.com/mishoo/UglifyJS2/blob/master/lib/ast.js) and
+[`TreeTransformer`](https://github.com/mishoo/UglifyJS2/blob/master/lib/transform.js)
+respectively.
 
 ### ESTree / SpiderMonkey AST
 

bin/uglifyjs

@@ -40,14 +40,15 @@ program.option("-o, --output <file>", "Output file (default STDOUT).");
 program.option("--comments [filter]", "Preserve copyright comments in the output.");
 program.option("--config-file <file>", "Read minify() options from JSON file.");
 program.option("-d, --define <expr>[=value]", "Global definitions.", parse_js("define"));
+program.option("-e, --enclose [arg[,...][:value[,...]]]", "Embed everything in a big function, with configurable argument(s) & value(s).");
 program.option("--ie8", "Support non-standard Internet Explorer 8.");
 program.option("--keep-fnames", "Do not mangle/drop function names. Useful for code relying on Function.prototype.name.");
 program.option("--name-cache <file>", "File to hold mangled name mappings.");
 program.option("--rename", "Force symbol expansion.");
 program.option("--no-rename", "Disable symbol expansion.");
 program.option("--self", "Build UglifyJS as a library (implies --wrap UglifyJS)");
-program.option("--source-map [options]", "Enable source map/specify source map options.", parse_source_map());
-program.option("--timings", "Display operations run time on STDERR.")
+program.option("--source-map [options]", "Enable source map/specify source map options.", parse_js());
+program.option("--timings", "Display operations run time on STDERR.");
 program.option("--toplevel", "Compress and/or mangle variables in toplevel scope.");
 program.option("--verbose", "Print diagnostic messages.");
 program.option("--warn", "Print warning messages.");
@@ -61,6 +62,7 @@ if (!program.output && program.sourceMap && program.sourceMap.url != "inline") {
 }
 [
     "compress",
+    "enclose",
     "ie8",
     "mangle",
     "sourceMap",
@@ -176,6 +178,11 @@ function run() {
     UglifyJS.AST_Node.warn_function = function(msg) {
         print_error("WARN: " + msg);
     };
+    var content = program.sourceMap && program.sourceMap.content;
+    if (content && content != "inline") {
+        print_error("INFO: Using input source map: " + content);
+        options.sourceMap.content = read_file(content, content);
+    }
     if (program.timings) options.timings = true;
     try {
         if (program.parse) {
@@ -377,19 +384,6 @@ function parse_js(flag) {
     }
 }
 
-function parse_source_map() {
-    var parse = parse_js();
-    return function(value, options) {
-        var hasContent = options && "content" in options;
-        var settings = parse(value, options);
-        if (!hasContent && settings.content && settings.content != "inline") {
-            print_error("INFO: Using input source map: " + settings.content);
-            settings.content = read_file(settings.content, settings.content);
-        }
-        return settings;
-    }
-}
-
 function skip_key(key) {
     return skip_keys.indexOf(key) >= 0;
 }

lib/ast.js

@@ -44,21 +44,21 @@
 "use strict";
 
 function DEFNODE(type, props, methods, base) {
-    if (arguments.length < 4) base = AST_Node;
-    if (!props) props = [];
-    else props = props.split(/\s+/);
+    if (typeof base === "undefined") base = AST_Node;
+    props = props ? props.split(/\s+/) : [];
     var self_props = props;
-    if (base && base.PROPS)
-        props = props.concat(base.PROPS);
-    var code = "return function AST_" + type + "(props){ if (props) { ";
-    for (var i = props.length; --i >= 0;) {
-        code += "this." + props[i] + " = props." + props[i] + ";";
-    }
+    if (base && base.PROPS) props = props.concat(base.PROPS);
+    var code = [
+        "return function AST_", type, "(props){",
+        "if(props){",
+    ];
+    props.forEach(function(prop) {
+        code.push("this.", prop, "=props.", prop, ";");
+    });
     var proto = base && new base;
-    if (proto && proto.initialize || (methods && methods.initialize))
-        code += "this.initialize();";
-    code += "}}";
-    var ctor = new Function(code)();
+    if (proto && proto.initialize || methods && methods.initialize) code.push("this.initialize();");
+    code.push("}}");
+    var ctor = new Function(code.join(""))();
     if (proto) {
         ctor.prototype = proto;
         ctor.BASE = base;
@@ -71,11 +71,11 @@ function DEFNODE(type, props, methods, base) {
     if (type) {
         ctor.prototype.TYPE = ctor.TYPE = type;
     }
-    if (methods) for (i in methods) if (HOP(methods, i)) {
-        if (/^\$/.test(i)) {
-            ctor[i.substr(1)] = methods[i];
+    if (methods) for (var name in methods) if (HOP(methods, name)) {
+        if (/^\$/.test(name)) {
+            ctor[name.substr(1)] = methods[name];
         } else {
-            ctor.prototype[i] = methods[i];
+            ctor.prototype[name] = methods[name];
         }
     }
     ctor.DEFMETHOD = function(name, method) {
@@ -85,7 +85,7 @@ function DEFNODE(type, props, methods, base) {
         exports["AST_" + type] = ctor;
     }
     return ctor;
-};
+}
 
 var AST_Token = DEFNODE("Token", "type value line col pos endline endcol endpos nlb comments_before comments_after file raw", {
 }, null);
@@ -158,11 +158,10 @@ function walk_body(node, visitor) {
     var body = node.body;
     if (body instanceof AST_Statement) {
         body._walk(visitor);
+    } else body.forEach(function(node) {
+        node._walk(visitor);
+    });
 }
-    else for (var i = 0, len = body.length; i < len; i++) {
-        body[i]._walk(visitor);
-    }
-};
 
 var AST_Block = DEFNODE("Block", "body", {
     $documentation: "A body of statements (usually braced)",
@@ -314,6 +313,9 @@ var AST_Scope = DEFNODE("Scope", "variables functions uses_with uses_eval parent
         if (this.functions) node.functions = this.functions.clone();
         if (this.enclosed) node.enclosed = this.enclosed.slice();
         return node;
+    },
+    pinned: function() {
+        return this.uses_eval || this.uses_with;
     }
 }, AST_Block);
 
@@ -332,6 +334,23 @@ var AST_Toplevel = DEFNODE("Toplevel", "globals", {
             }
         }));
         return wrapped_tl;
+    },
+    wrap_enclose: function(args_values) {
+        if (typeof args_values != "string") args_values = "";
+        var index = args_values.indexOf(":");
+        if (index < 0) index = args_values.length;
+        var body = this.body;
+        return parse([
+            "(function(",
+            args_values.slice(0, index),
+            '){"$ORIG"})(',
+            args_values.slice(index + 1),
+            ")"
+        ].join("")).transform(new TreeTransformer(function(node) {
+            if (node instanceof AST_Directive && node.value == "$ORIG") {
+                return MAP.splice(body);
+            }
+        }));
     }
 }, AST_Scope);
 
@@ -345,10 +364,9 @@ var AST_Lambda = DEFNODE("Lambda", "name argnames uses_arguments", {
     _walk: function(visitor) {
         return visitor._visit(this, function() {
             if (this.name) this.name._walk(visitor);
-            var argnames = this.argnames;
-            for (var i = 0, len = argnames.length; i < len; i++) {
-                argnames[i]._walk(visitor);
-            }
+            this.argnames.forEach(function(argname) {
+                argname._walk(visitor);
+            });
             walk_body(this, visitor);
         });
     }
@@ -508,10 +526,9 @@ var AST_Definitions = DEFNODE("Definitions", "definitions", {
     },
     _walk: function(visitor) {
         return visitor._visit(this, function() {
-            var definitions = this.definitions;
-            for (var i = 0, len = definitions.length; i < len; i++) {
-                definitions[i]._walk(visitor);
-            }
+            this.definitions.forEach(function(defn) {
+                defn._walk(visitor);
+            });
         });
     }
 }, AST_Statement);
@@ -544,11 +561,10 @@ var AST_Call = DEFNODE("Call", "expression args", {
     },
     _walk: function(visitor) {
         return visitor._visit(this, function() {
-            var args = this.args;
-            for (var i = 0, len = args.length; i < len; i++) {
-                args[i]._walk(visitor);
-            }
             this.expression._walk(visitor);
+            this.args.forEach(function(node) {
+                node._walk(visitor);
+            });
         });
     }
 });
@@ -663,10 +679,9 @@ var AST_Array = DEFNODE("Array", "elements", {
     },
     _walk: function(visitor) {
         return visitor._visit(this, function() {
-            var elements = this.elements;
-            for (var i = 0, len = elements.length; i < len; i++) {
-                elements[i]._walk(visitor);
-            }
+            this.elements.forEach(function(element) {
+                element._walk(visitor);
+            });
         });
     }
 });
@@ -678,10 +693,9 @@ var AST_Object = DEFNODE("Object", "properties", {
     },
     _walk: function(visitor) {
         return visitor._visit(this, function() {
-            var properties = this.properties;
-            for (var i = 0, len = properties.length; i < len; i++) {
-                properties[i]._walk(visitor);
-            }
+            this.properties.forEach(function(prop) {
+                prop._walk(visitor);
+            });
         });
     }
 });
@@ -820,12 +834,12 @@ var AST_NaN = DEFNODE("NaN", null, {
 
 var AST_Undefined = DEFNODE("Undefined", null, {
     $documentation: "The `undefined` value",
-    value: (function(){}())
+    value: function(){}()
 }, AST_Atom);
 
 var AST_Hole = DEFNODE("Hole", null, {
     $documentation: "A hole in an array",
-    value: (function(){}())
+    value: function(){}()
 }, AST_Atom);
 
 var AST_Infinity = DEFNODE("Infinity", null, {
@@ -853,7 +867,7 @@ function TreeWalker(callback) {
     this.visit = callback;
     this.stack = [];
     this.directives = Object.create(null);
-};
+}
 TreeWalker.prototype = {
     _visit: function(node, descend) {
         this.push(node);

lib/minify.js

@@ -7,15 +7,23 @@ var to_base64 = typeof btoa == "undefined" ? function(str) {
     return new Buffer(str).toString("base64");
 } : btoa;
 
-function read_source_map(code) {
+function read_source_map(name, code) {
     var match = /\n\/\/# sourceMappingURL=data:application\/json(;.*?)?;base64,(.*)/.exec(code);
     if (!match) {
-        AST_Node.warn("inline source map not found");
+        AST_Node.warn("inline source map not found: " + name);
         return null;
     }
     return to_ascii(match[2]);
 }
 
+function parse_source_map(content) {
+    try {
+        return JSON.parse(content);
+    } catch (ex) {
+        throw new Error("invalid input source map: " + content);
+    }
+}
+
 function set_shorthand(name, options, keys) {
     if (options[name]) {
         keys.forEach(function(key) {
@@ -47,6 +55,7 @@ function minify(files, options) {
     try {
         options = defaults(options, {
             compress: {},
+            enclose: false,
             ie8: false,
             keep_fnames: false,
             mangle: {},
@@ -113,7 +122,7 @@ function minify(files, options) {
             };
         }
         if (timings) timings.parse = Date.now();
-        var toplevel;
+        var source_maps, toplevel;
         if (files instanceof AST_Toplevel) {
             toplevel = files;
         } else {
@@ -122,13 +131,23 @@ function minify(files, options) {
             }
             options.parse = options.parse || {};
             options.parse.toplevel = null;
+            var source_map_content = options.sourceMap && options.sourceMap.content;
+            if (typeof source_map_content == "string" && source_map_content != "inline") {
+                source_map_content = parse_source_map(source_map_content);
+            }
+            source_maps = source_map_content && Object.create(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]);
+                if (source_maps) {
+                    if (source_map_content == "inline") {
+                        var inlined_content = read_source_map(name, files[name]);
+                        if (inlined_content) {
+                            source_maps[name] = parse_source_map(inlined_content);
+                        }
+                    } else {
+                        source_maps[name] = source_map_content;
+                    }
                 }
             }
             toplevel = options.parse.toplevel;
@@ -139,6 +158,9 @@ function minify(files, options) {
         if (options.wrap) {
             toplevel = toplevel.wrap_commonjs(options.wrap);
         }
+        if (options.enclose) {
+            toplevel = toplevel.wrap_enclose(options.enclose);
+        }
         if (timings) timings.rename = Date.now();
         if (options.rename) {
             toplevel.figure_out_scope(options.mangle);
@@ -164,12 +186,9 @@ function minify(files, options) {
         }
         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,
+                    orig: source_maps,
                     root: options.sourceMap.root
                 });
                 if (options.sourceMap.includeSources) {
@@ -178,6 +197,8 @@ function minify(files, options) {
                     } else for (var name in files) if (HOP(files, name)) {
                         options.output.source_map.get().setSourceContent(name, files[name]);
                     }
+                } else {
+                    options.output.source_map.get()._sourcesContents = null;
                 }
             }
             delete options.output.ast;

lib/mozilla-ast.js

@@ -44,10 +44,8 @@
 "use strict";
 
 (function() {
-
-    var normalize_directives = function(body) {
+    function normalize_directives(body) {
         var in_directive = true;
-
         for (var i = 0; i < body.length; i++) {
             if (in_directive && body[i] instanceof AST_Statement && body[i].body instanceof AST_String) {
                 body[i] = new AST_Directive({
@@ -59,9 +57,8 @@
                 in_directive = false;
             }
         }
-
         return body;
-    };
+    }
 
     var MOZ_TO_ME = {
         Program: function(M) {
@@ -180,6 +177,17 @@
                 end    : my_end_token(M)
             };
             if (val === null) return new AST_Null(args);
+            var rx = M.regex;
+            if (rx && rx.pattern) {
+                // RegExpLiteral as per ESTree AST spec
+                args.value = new RegExp(rx.pattern, rx.flags);
+                args.value.raw_source = rx.pattern;
+                return new AST_RegExp(args);
+            } else if (rx) {
+                // support legacy RegExp
+                args.value = M.regex && M.raw ? M.raw : val;
+                return new AST_RegExp(args);
+            }
             switch (typeof val) {
               case "string":
                 args.value = val;
@@ -189,16 +197,6 @@
                 return new AST_Number(args);
               case "boolean":
                 return new (val ? AST_True : AST_False)(args);
-              default:
-                var rx = M.regex;
-                if (rx && rx.pattern) {
-                    // RegExpLiteral as per ESTree AST spec
-                    args.value = new RegExp(rx.pattern, rx.flags).toString();
-                } else {
-                    // support legacy RegExp
-                    args.value = M.regex && M.raw ? M.raw : val;
-                }
-                return new AST_RegExp(args);
             }
         },
         Identifier: function(M) {
@@ -410,14 +408,15 @@
     });
 
     def_to_moz(AST_RegExp, function To_Moz_RegExpLiteral(M) {
-        var value = M.value;
+        var flags = M.value.toString().match(/[gimuy]*$/)[0];
+        var value = "/" + M.value.raw_source + "/" + flags;
         return {
             type: "Literal",
             value: value,
-            raw: value.toString(),
+            raw: value,
             regex: {
-                pattern: value.source,
-                flags: value.toString().match(/[gimuy]*$/)[0]
+                pattern: M.value.raw_source,
+                flags: flags
             }
         };
     });
@@ -478,7 +477,7 @@
             endpos  : range ? range[0] : moznode.start,
             raw     : raw_token(moznode),
         });
-    };
+    }
 
     function my_end_token(moznode) {
         var loc = moznode.loc, end = loc && loc.end;
@@ -493,7 +492,7 @@
             endpos  : range ? range[1] : moznode.end,
             raw     : raw_token(moznode),
         });
-    };
+    }
 
     function map(moztype, mytype, propmap) {
         var moz_to_me = "function From_Moz_" + moztype + "(M){\n";
@@ -548,7 +547,7 @@
         );
         MOZ_TO_ME[moztype] = moz_to_me;
         def_to_moz(mytype, me_to_moz);
-    };
+    }
 
     var FROM_MOZ_STACK = null;
 
@@ -557,13 +556,28 @@
         var ret = node != null ? MOZ_TO_ME[node.type](node) : null;
         FROM_MOZ_STACK.pop();
         return ret;
-    };
+    }
 
     AST_Node.from_mozilla_ast = function(node) {
         var save_stack = FROM_MOZ_STACK;
         FROM_MOZ_STACK = [];
         var ast = from_moz(node);
         FROM_MOZ_STACK = save_stack;
+        ast.walk(new TreeWalker(function(node) {
+            if (node instanceof AST_LabelRef) {
+                for (var level = 0, parent; parent = this.parent(level); level++) {
+                    if (parent instanceof AST_Scope) break;
+                    if (parent instanceof AST_LabeledStatement && parent.label.name == node.name) {
+                        node.thedef = parent.label;
+                        break;
+                    }
+                }
+                if (!node.thedef) {
+                    var s = node.start;
+                    js_error("Undefined label " + node.name, s.file, s.line, s.col, s.pos);
+                }
+            }
+        }));
         return ast;
     };
 
@@ -583,24 +597,24 @@
             }
         }
         return moznode;
-    };
+    }
 
     function def_to_moz(mytype, handler) {
         mytype.DEFMETHOD("to_mozilla_ast", function() {
             return set_moz_loc(this, handler(this));
         });
-    };
+    }
 
     function to_moz(node) {
         return node != null ? node.to_mozilla_ast() : null;
-    };
+    }
 
     function to_moz_block(node) {
         return {
             type: "BlockStatement",
             body: node.body.map(to_moz)
         };
-    };
+    }
 
     function to_moz_scope(type, node) {
         var body = node.body.map(to_moz);
@@ -611,5 +625,5 @@
             type: type,
             body: body
         };
-    };
+    }
 })();

lib/output.js

@@ -173,7 +173,7 @@ function OutputStream(options) {
           default:
             return dq > sq ? quote_single() : quote_double();
         }
-    };
+    }
 
     function encode_string(str, quote) {
         var ret = make_string(str, quote);
@@ -183,20 +183,21 @@ function OutputStream(options) {
             ret = ret.replace(/--\x3e/g, "--\\x3e");
         }
         return ret;
-    };
+    }
 
     function make_name(name) {
         name = name.toString();
         name = to_utf8(name, true);
         return name;
-    };
+    }
 
     function make_indent(back) {
         return repeat_string(" ", options.indent_start + indentation - back * options.indent_level);
-    };
+    }
 
     /* -----[ beautification/minification ]----- */
 
+    var has_parens = false;
     var might_need_space = false;
     var might_need_semicolon = false;
     var might_add_newline = 0;
@@ -280,7 +281,7 @@ function OutputStream(options) {
             might_need_semicolon = false;
 
             if (prev == ":" && ch == "}" || (!ch || ";}".indexOf(ch) < 0) && prev != ";") {
-                if (options.semicolons || requireSemicolonChars(ch)) {
+                if (options.semicolons || requireSemicolonChars[ch]) {
                     OUTPUT += ";";
                     current_col++;
                     current_pos++;
@@ -340,6 +341,7 @@ function OutputStream(options) {
         }
 
         OUTPUT += str;
+        has_parens = str[str.length - 1] == "(";
         current_pos += str.length;
         var a = str.split(/\r?\n/), n = a.length - 1;
         current_line += n;
@@ -349,7 +351,7 @@ function OutputStream(options) {
             current_col = a[n].length;
         }
         last = str;
-    };
+    }
 
     var space = options.beautify ? function() {
         print(" ");
@@ -372,6 +374,11 @@ function OutputStream(options) {
         return ret;
     } : function(col, cont) { return cont() };
 
+    var may_add_newline = options.max_line_len ? function() {
+        ensure_line_len();
+        might_add_newline = OUTPUT.length;
+    } : noop;
+
     var newline = options.beautify ? function() {
         if (newline_insert < 0) return print("\n");
         if (OUTPUT[newline_insert] != "\n") {
@@ -380,10 +387,7 @@ function OutputStream(options) {
             current_line++;
         }
         newline_insert++;
-    } : options.max_line_len ? function() {
-        ensure_line_len();
-        might_add_newline = OUTPUT.length;
-    } : noop;
+    } : may_add_newline;
 
     var semicolon = options.beautify ? function() {
         print(";");
@@ -394,11 +398,11 @@ function OutputStream(options) {
     function force_semicolon() {
         might_need_semicolon = false;
         print(";");
-    };
+    }
 
     function next_indent() {
         return indentation + options.indent_level;
-    };
+    }
 
     function with_block(cont) {
         var ret;
@@ -410,34 +414,40 @@ function OutputStream(options) {
         indent();
         print("}");
         return ret;
-    };
+    }
 
     function with_parens(cont) {
         print("(");
+        may_add_newline();
         //XXX: still nice to have that for argument lists
         //var ret = with_indent(current_col, cont);
         var ret = cont();
+        may_add_newline();
         print(")");
         return ret;
-    };
+    }
 
     function with_square(cont) {
         print("[");
+        may_add_newline();
         //var ret = with_indent(current_col, cont);
         var ret = cont();
+        may_add_newline();
         print("]");
         return ret;
-    };
+    }
 
     function comma() {
+        may_add_newline();
         print(",");
+        may_add_newline();
         space();
-    };
+    }
 
     function colon() {
         print(":");
         space();
-    };
+    }
 
     var add_mapping = mappings ? function(token, name) {
         mapping_token = token;
@@ -449,7 +459,7 @@ function OutputStream(options) {
             ensure_line_len();
         }
         return OUTPUT;
-    };
+    }
 
     function has_nlb() {
         var index = OUTPUT.lastIndexOf("\n");
@@ -576,7 +586,7 @@ function OutputStream(options) {
         indentation     : function() { return indentation },
         current_width   : function() { return current_col - indentation },
         should_break    : function() { return options.width && this.current_width() >= options.width },
-        has_parens      : function() { return OUTPUT.slice(-1) == "(" },
+        has_parens      : function() { return has_parens },
         newline         : newline,
         print           : print,
         space           : space,
@@ -617,8 +627,7 @@ function OutputStream(options) {
             return stack[stack.length - 2 - (n || 0)];
         }
     };
-
-};
+}
 
 /* -----[ code generators ]----- */
 
@@ -628,7 +637,7 @@ function OutputStream(options) {
 
     function DEFPRINT(nodetype, generator) {
         nodetype.DEFMETHOD("_codegen", generator);
-    };
+    }
 
     var in_directive = false;
     var active_scope = null;
@@ -677,7 +686,7 @@ function OutputStream(options) {
         } else {
             nodetype.DEFMETHOD("needs_parens", func);
         }
-    };
+    }
 
     PARENS(AST_Node, return_false);
 
@@ -863,7 +872,7 @@ function OutputStream(options) {
             }
         });
         in_directive = false;
-    };
+    }
 
     AST_StatementWithBody.DEFMETHOD("_do_print_body", function(output) {
         force_statement(this.body, output);
@@ -899,7 +908,7 @@ function OutputStream(options) {
                 display_body(self.body, false, output, allow_directives);
             });
         } else print_braced_empty(self, output);
-    };
+    }
     DEFPRINT(AST_BlockStatement, function(self, output) {
         print_braced(self, output);
     });
@@ -1002,36 +1011,27 @@ function OutputStream(options) {
         self._do_print(output);
     });
 
-    /* -----[ exits ]----- */
-    AST_Exit.DEFMETHOD("_do_print", function(output, kind){
+    /* -----[ jumps ]----- */
+    function print_jump(output, kind, target) {
         output.print(kind);
-        if (this.value) {
+        if (target) {
             output.space();
-            this.value.print(output);
+            target.print(output);
         }
         output.semicolon();
-    });
+    }
+
     DEFPRINT(AST_Return, function(self, output) {
-        self._do_print(output, "return");
+        print_jump(output, "return", self.value);
     });
     DEFPRINT(AST_Throw, function(self, output) {
-        self._do_print(output, "throw");
-    });
-
-    /* -----[ loop control ]----- */
-    AST_LoopControl.DEFMETHOD("_do_print", function(output, kind){
-        output.print(kind);
-        if (this.label) {
-            output.space();
-            this.label.print(output);
-        }
-        output.semicolon();
+        print_jump(output, "throw", self.value);
     });
     DEFPRINT(AST_Break, function(self, output) {
-        self._do_print(output, "break");
+        print_jump(output, "break", self.label);
     });
     DEFPRINT(AST_Continue, function(self, output) {
-        self._do_print(output, "continue");
+        print_jump(output, "continue", self.label);
     });
 
     /* -----[ if ]----- */
@@ -1062,7 +1062,7 @@ function OutputStream(options) {
             else break;
         }
         force_statement(self.body, output);
-    };
+    }
     DEFPRINT(AST_If, function(self, output) {
         output.print("if");
         output.space();
@@ -1152,22 +1152,15 @@ function OutputStream(options) {
         print_braced(self, output);
     });
 
-    /* -----[ var/const ]----- */
-    AST_Definitions.DEFMETHOD("_do_print", function(output, kind){
-        output.print(kind);
+    DEFPRINT(AST_Var, function(self, output) {
+        output.print("var");
         output.space();
-        this.definitions.forEach(function(def, i){
+        self.definitions.forEach(function(def, i) {
             if (i) output.comma();
             def.print(output);
         });
         var p = output.parent();
-        var in_for = p instanceof AST_For || p instanceof AST_ForIn;
-        var avoid_semicolon = in_for && p.init === this;
-        if (!avoid_semicolon)
-            output.semicolon();
-    });
-    DEFPRINT(AST_Var, function(self, output){
-        self._do_print(output, "var");
+        if (p.init !== self || !(p instanceof AST_For || p instanceof AST_ForIn)) output.semicolon();
     });
 
     function parenthesize_for_noin(node, output, noin) {
@@ -1182,7 +1175,7 @@ function OutputStream(options) {
             }
         }));
         node.print(output, parens);
-    };
+    }
 
     DEFPRINT(AST_VarDef, function(self, output) {
         self.name.print(output);
@@ -1216,9 +1209,8 @@ function OutputStream(options) {
         output.space();
         AST_Call.prototype._codegen(self, output);
     });
-
-    AST_Sequence.DEFMETHOD("_do_print", function(output){
-        this.expressions.forEach(function(node, index) {
+    DEFPRINT(AST_Sequence, function(self, output) {
+        self.expressions.forEach(function(node, index) {
             if (index > 0) {
                 output.comma();
                 if (output.should_break()) {
@@ -1229,22 +1221,11 @@ function OutputStream(options) {
             node.print(output);
         });
     });
-    DEFPRINT(AST_Sequence, function(self, output){
-        self._do_print(output);
-        // var p = output.parent();
-        // if (p instanceof AST_Statement) {
-        //     output.with_indent(output.next_indent(), function(){
-        //         self._do_print(output);
-        //     });
-        // } else {
-        //     self._do_print(output);
-        // }
-    });
     DEFPRINT(AST_Dot, function(self, output) {
         var expr = self.expression;
         expr.print(output);
         var prop = self.property;
-        if (output.option("ie8") && RESERVED_WORDS(prop)) {
+        if (output.option("ie8") && RESERVED_WORDS[prop]) {
             output.print("[");
             output.add_mapping(self.end);
             output.print_string(prop);
@@ -1356,7 +1337,7 @@ function OutputStream(options) {
             output.print_string(key);
         } else if ("" + +key == key && 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("ie8") : is_identifier_string(key)) {
             if (quote && output.option("keep_quoted_props")) {
                 output.print_string(key, quote);
             } else {
@@ -1428,7 +1409,7 @@ function OutputStream(options) {
             else
                 stat.print(output);
         }
-    };
+    }
 
     // self should be AST_New.  decide if we want to show parens or not.
     function need_constructor_parens(self, output) {
@@ -1436,7 +1417,7 @@ function OutputStream(options) {
         if (self.args.length > 0) return true;
 
         return output.option("beautify");
-    };
+    }
 
     function best_of(a) {
         var best = a[0], len = best.length;
@@ -1447,27 +1428,31 @@ function OutputStream(options) {
             }
         }
         return best;
-    };
+    }
 
     function make_num(num) {
-        var str = num.toString(10), a = [ str.replace(/^0\./, ".").replace('e+', 'e') ], m;
+        var str = num.toString(10).replace(/^0\./, ".").replace("e+", "e");
+        var candidates = [ str ];
         if (Math.floor(num) === num) {
-            if (num >= 0) {
-                a.push("0x" + num.toString(16).toLowerCase(), // probably pointless
-                       "0" + num.toString(8)); // same.
+            if (num < 0) {
+                candidates.push("-0x" + (-num).toString(16).toLowerCase());
             } else {
-                a.push("-0x" + (-num).toString(16).toLowerCase(), // probably pointless
-                       "-0" + (-num).toString(8)); // same.
+                candidates.push("0x" + num.toString(16).toLowerCase());
             }
-            if ((m = /^(.*?)(0+)$/.exec(num))) {
-                a.push(m[1] + "e" + m[2].length);
         }
-        } else if ((m = /^0?\.(0+)(.*)$/.exec(num))) {
-            a.push(m[2] + "e-" + (m[1].length + m[2].length),
-                   str.substr(str.indexOf(".")));
+        var match, len, digits;
+        if (match = /^\.0+/.exec(str)) {
+            len = match[0].length;
+            digits = str.slice(len);
+            candidates.push(digits + "e-" + (digits.length + len - 1));
+        } else if (match = /0+$/.exec(str)) {
+            len = match[0].length;
+            candidates.push(str.slice(0, -len) + "e" + len);
+        } else if (match = /^(\d)\.(\d+)e(-?\d+)$/.exec(str)) {
+            candidates.push(match[1] + match[2] + "e" + (match[3] - match[2].length));
+        }
+        return best_of(candidates);
     }
-        return best_of(a);
-    };
 
     function make_block(stmt, output) {
         if (!stmt || stmt instanceof AST_EmptyStatement)
@@ -1479,52 +1464,57 @@ function OutputStream(options) {
             stmt.print(output);
             output.newline();
         });
-    };
+    }
 
     /* -----[ source map generators ]----- */
 
     function DEFMAP(nodetype, generator) {
-        nodetype.DEFMETHOD("add_source_map", function(stream){
-            generator(this, stream);
+        nodetype.forEach(function(nodetype) {
+            nodetype.DEFMETHOD("add_source_map", generator);
         });
-    };
+    }
 
+    DEFMAP([
         // We could easily add info for ALL nodes, but it seems to me that
         // would be quite wasteful, hence this noop in the base class.
-    DEFMAP(AST_Node, noop);
-
-    function basic_sourcemap_gen(self, output) {
-        output.add_mapping(self.start);
-    };
+        AST_Node,
+        // since the label symbol will mark it
+        AST_LabeledStatement,
+        AST_Toplevel,
+    ], noop);
 
     // XXX: I'm not exactly sure if we need it for all of these nodes,
     // or if we should add even more.
-
-    DEFMAP(AST_Directive, basic_sourcemap_gen);
-    DEFMAP(AST_Debugger, basic_sourcemap_gen);
-    DEFMAP(AST_Symbol, basic_sourcemap_gen);
-    DEFMAP(AST_Jump, basic_sourcemap_gen);
-    DEFMAP(AST_StatementWithBody, basic_sourcemap_gen);
-    DEFMAP(AST_LabeledStatement, noop); // since the label symbol will mark it
-    DEFMAP(AST_Lambda, basic_sourcemap_gen);
-    DEFMAP(AST_Switch, basic_sourcemap_gen);
-    DEFMAP(AST_SwitchBranch, basic_sourcemap_gen);
-    DEFMAP(AST_BlockStatement, basic_sourcemap_gen);
-    DEFMAP(AST_Toplevel, noop);
-    DEFMAP(AST_New, basic_sourcemap_gen);
-    DEFMAP(AST_Try, basic_sourcemap_gen);
-    DEFMAP(AST_Catch, basic_sourcemap_gen);
-    DEFMAP(AST_Finally, basic_sourcemap_gen);
-    DEFMAP(AST_Definitions, basic_sourcemap_gen);
-    DEFMAP(AST_Constant, basic_sourcemap_gen);
-    DEFMAP(AST_ObjectSetter, function(self, output){
-        output.add_mapping(self.start, self.key.name);
-    });
-    DEFMAP(AST_ObjectGetter, function(self, output){
-        output.add_mapping(self.start, self.key.name);
-    });
-    DEFMAP(AST_ObjectProperty, function(self, output){
-        output.add_mapping(self.start, self.key);
+    DEFMAP([
+        AST_Array,
+        AST_BlockStatement,
+        AST_Catch,
+        AST_Constant,
+        AST_Debugger,
+        AST_Definitions,
+        AST_Directive,
+        AST_Finally,
+        AST_Jump,
+        AST_Lambda,
+        AST_New,
+        AST_Object,
+        AST_StatementWithBody,
+        AST_Symbol,
+        AST_Switch,
+        AST_SwitchBranch,
+        AST_Try,
+    ], function(output) {
+        output.add_mapping(this.start);
     });
 
+    DEFMAP([
+        AST_ObjectGetter,
+        AST_ObjectSetter,
+     ], function(output) {
+        output.add_mapping(this.start, this.key.name);
+    });
+
+    DEFMAP([ AST_ObjectProperty ], function(output) {
+        output.add_mapping(this.start, this.key);
+    });
 })();

lib/parse.js

@@ -130,7 +130,7 @@ function is_letter(code) {
     return (code >= 97 && code <= 122)
         || (code >= 65 && code <= 90)
         || (code >= 0xaa && UNICODE.letter.test(String.fromCharCode(code)));
-};
+}
 
 function is_surrogate_pair_head(code) {
     if (typeof code == "string")
@@ -146,11 +146,11 @@ function is_surrogate_pair_tail(code) {
 
 function is_digit(code) {
     return code >= 48 && code <= 57;
-};
+}
 
 function is_alphanumeric_char(code) {
     return is_digit(code) || is_letter(code);
-};
+}
 
 function is_unicode_digit(code) {
     return UNICODE.digit.test(String.fromCharCode(code));
@@ -158,19 +158,19 @@ function is_unicode_digit(code) {
 
 function is_unicode_combining_mark(ch) {
     return UNICODE.non_spacing_mark.test(ch) || UNICODE.space_combining_mark.test(ch);
-};
+}
 
 function is_unicode_connector_punctuation(ch) {
     return UNICODE.connector_punctuation.test(ch);
-};
+}
 
 function is_identifier(name) {
-    return !RESERVED_WORDS(name) && /^[a-z_$][a-z0-9_$]*$/i.test(name);
-};
+    return !RESERVED_WORDS[name] && /^[a-z_$][a-z0-9_$]*$/i.test(name);
+}
 
 function is_identifier_start(code) {
     return code == 36 || code == 95 || is_letter(code);
-};
+}
 
 function is_identifier_char(ch) {
     var code = ch.charCodeAt(0);
@@ -182,11 +182,11 @@ function is_identifier_char(ch) {
         || is_unicode_connector_punctuation(ch)
         || is_unicode_digit(code)
     ;
-};
+}
 
 function is_identifier_string(str) {
     return /^[a-z_$][a-z0-9_$]*$/i.test(str);
-};
+}
 
 function parse_js_number(num) {
     if (RE_HEX_NUMBER.test(num)) {
@@ -197,7 +197,7 @@ function parse_js_number(num) {
         var val = parseFloat(num);
         if (val == num) return val;
     }
-};
+}
 
 function JS_Parse_Error(message, filename, line, col, pos) {
     this.message = message;
@@ -205,7 +205,7 @@ function JS_Parse_Error(message, filename, line, col, pos) {
     this.line = line;
     this.col = col;
     this.pos = pos;
-};
+}
 JS_Parse_Error.prototype = Object.create(Error.prototype);
 JS_Parse_Error.prototype.constructor = JS_Parse_Error;
 JS_Parse_Error.prototype.name = "SyntaxError";
@@ -213,11 +213,11 @@ configure_error_stack(JS_Parse_Error);
 
 function js_error(message, filename, line, col, pos) {
     throw new JS_Parse_Error(message, filename, line, col, pos);
-};
+}
 
 function is_token(token, type, val) {
     return token.type == type && (val == null || token.value == val);
-};
+}
 
 var EX_EOF = {};
 
@@ -239,13 +239,15 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         directive_stack : []
     };
 
-    function peek() { return S.text.charAt(S.pos); };
+    function peek() {
+        return S.text.charAt(S.pos);
+    }
 
     function next(signal_eof, in_string) {
         var ch = S.text.charAt(S.pos++);
         if (signal_eof && !ch)
             throw EX_EOF;
-        if (NEWLINE_CHARS(ch)) {
+        if (NEWLINE_CHARS[ch]) {
             S.newline_before = S.newline_before || !in_string;
             ++S.line;
             S.col = 0;
@@ -258,43 +260,43 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
             ++S.col;
         }
         return ch;
-    };
+    }
 
     function forward(i) {
         while (i-- > 0) next();
-    };
+    }
 
     function looking_at(str) {
         return S.text.substr(S.pos, str.length) == str;
-    };
+    }
 
     function find_eol() {
         var text = S.text;
         for (var i = S.pos, n = S.text.length; i < n; ++i) {
             var ch = text[i];
-            if (NEWLINE_CHARS(ch))
+            if (NEWLINE_CHARS[ch])
                 return i;
         }
         return -1;
-    };
+    }
 
     function find(what, signal_eof) {
         var pos = S.text.indexOf(what, S.pos);
         if (signal_eof && pos == -1) throw EX_EOF;
         return pos;
-    };
+    }
 
     function start_token() {
         S.tokline = S.line;
         S.tokcol = S.col;
         S.tokpos = S.pos;
-    };
+    }
 
     var prev_was_dot = false;
     function token(type, value, is_comment) {
-        S.regex_allowed = ((type == "operator" && !UNARY_POSTFIX(value)) ||
-                           (type == "keyword" && KEYWORDS_BEFORE_EXPRESSION(value)) ||
-                           (type == "punc" && PUNC_BEFORE_EXPRESSION(value)));
+        S.regex_allowed = ((type == "operator" && !UNARY_POSTFIX[value]) ||
+                           (type == "keyword" && KEYWORDS_BEFORE_EXPRESSION[value]) ||
+                           (type == "punc" && PUNC_BEFORE_EXPRESSION[value]));
         if (type == "punc" && value == ".") {
             prev_was_dot = true;
         } else if (!is_comment) {
@@ -321,23 +323,23 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         }
         S.newline_before = false;
         return new AST_Token(ret);
-    };
+    }
 
     function skip_whitespace() {
-        while (WHITESPACE_CHARS(peek()))
+        while (WHITESPACE_CHARS[peek()])
             next();
-    };
+    }
 
     function read_while(pred) {
         var ret = "", ch, i = 0;
         while ((ch = peek()) && pred(ch, i++))
             ret += next();
         return ret;
-    };
+    }
 
     function parse_error(err) {
         js_error(err, filename, S.tokline, S.tokcol, S.tokpos);
-    };
+    }
 
     function read_num(prefix) {
         var has_e = false, after_e = false, has_x = false, has_dot = prefix == ".";
@@ -367,7 +369,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         } else {
             parse_error("Invalid syntax: " + num);
         }
-    };
+    }
 
     function read_escaped_char(in_string) {
         var ch = next(true, in_string);
@@ -390,7 +392,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         if (ch >= "0" && ch <= "7")
             return read_octal_escape_sequence(ch);
         return ch;
-    };
+    }
 
     function read_octal_escape_sequence(ch) {
         // Read
@@ -417,14 +419,14 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
             num = (num << 4) | digit;
         }
         return num;
-    };
+    }
 
     var read_string = with_eof_error("Unterminated string constant", function(quote_char) {
         var quote = next(), ret = "";
         for (;;) {
             var ch = next(true, true);
             if (ch == "\\") ch = read_escaped_char(true);
-            else if (NEWLINE_CHARS(ch)) parse_error("Unterminated string constant");
+            else if (NEWLINE_CHARS[ch]) parse_error("Unterminated string constant");
             else if (ch == quote) break;
             ret += ch;
         }
@@ -447,7 +449,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         S.comments_before.push(token(type, ret, true));
         S.regex_allowed = regex_allowed;
         return next_token;
-    };
+    }
 
     var skip_multiline_comment = with_eof_error("Unterminated multiline comment", function() {
         var regex_allowed = S.regex_allowed;
@@ -476,16 +478,16 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
                 backslash = false;
             }
         }
-        if (KEYWORDS(name) && escaped) {
+        if (KEYWORDS[name] && escaped) {
             hex = name.charCodeAt(0).toString(16).toUpperCase();
             name = "\\u" + "0000".substr(hex.length) + hex + name.slice(1);
         }
         return name;
-    };
+    }
 
     var read_regexp = with_eof_error("Unterminated regular expression", function(source) {
         var prev_backslash = false, ch, in_class = false;
-        while ((ch = next(true))) if (NEWLINE_CHARS(ch)) {
+        while ((ch = next(true))) if (NEWLINE_CHARS[ch]) {
             parse_error("Unexpected line terminator");
         } else if (prev_backslash) {
             source += "\\" + ch;
@@ -517,15 +519,15 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         function grow(op) {
             if (!peek()) return op;
             var bigger = op + peek();
-            if (OPERATORS(bigger)) {
+            if (OPERATORS[bigger]) {
                 next();
                 return grow(bigger);
             } else {
                 return op;
             }
-        };
+        }
         return token("operator", grow(prefix || next()));
-    };
+    }
 
     function handle_slash() {
         next();
@@ -538,23 +540,23 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
             return skip_multiline_comment();
         }
         return S.regex_allowed ? read_regexp("") : read_operator("/");
-    };
+    }
 
     function handle_dot() {
         next();
         return is_digit(peek().charCodeAt(0))
             ? read_num(".")
             : token("punc", ".");
-    };
+    }
 
     function read_word() {
         var word = read_name();
         if (prev_was_dot) return token("name", word);
-        return KEYWORDS_ATOM(word) ? token("atom", word)
-            : !KEYWORDS(word) ? token("name", word)
-            : OPERATORS(word) ? token("operator", word)
+        return KEYWORDS_ATOM[word] ? token("atom", word)
+            : !KEYWORDS[word] ? token("name", word)
+            : OPERATORS[word] ? token("operator", word)
             : token("keyword", word);
-    };
+    }
 
     function with_eof_error(eof_error, cont) {
         return function(x) {
@@ -565,7 +567,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
                 else throw ex;
             }
         };
-    };
+    }
 
     function next_token(force_regexp) {
         if (force_regexp != null)
@@ -603,13 +605,13 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
               }
             }
             if (is_digit(code)) return read_num();
-            if (PUNC_CHARS(ch)) return token("punc", next());
-            if (OPERATOR_CHARS(ch)) return read_operator();
+            if (PUNC_CHARS[ch]) return token("punc", next());
+            if (OPERATOR_CHARS[ch]) return read_operator();
             if (code == 92 || is_identifier_start(code)) return read_word();
             break;
         }
         parse_error("Unexpected character '" + ch + "'");
-    };
+    }
 
     next_token.context = function(nc) {
         if (nc) S = nc;
@@ -645,8 +647,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
     }
 
     return next_token;
-
-};
+}
 
 /* -----[ Parser (constants) ]----- */
 
@@ -666,7 +667,7 @@ var UNARY_POSTFIX = makePredicate([ "--", "++" ]);
 
 var ASSIGNMENT = makePredicate([ "=", "+=", "-=", "/=", "*=", "%=", ">>=", "<<=", ">>>=", "|=", "^=", "&=" ]);
 
-var PRECEDENCE = (function(a, ret){
+var PRECEDENCE = function(a, ret) {
     for (var i = 0; i < a.length; ++i) {
         var b = a[i];
         for (var j = 0; j < b.length; ++j) {
@@ -674,8 +675,7 @@ var PRECEDENCE = (function(a, ret){
         }
     }
     return ret;
-})(
-    [
+}([
     ["||"],
     ["&&"],
     ["|"],
@@ -686,16 +686,13 @@ var PRECEDENCE = (function(a, ret){
     [">>", "<<", ">>>"],
     ["+", "-"],
     ["*", "/", "%"]
-    ],
-    {}
-);
+], {});
 
 var ATOMIC_START_TOKEN = makePredicate([ "atom", "num", "string", "regexp", "name" ]);
 
 /* -----[ Parser ]----- */
 
 function parse($TEXT, options) {
-
     options = defaults(options, {
         bare_returns   : false,
         expression     : false,
@@ -724,9 +721,11 @@ function parse($TEXT, options) {
 
     function is(type, value) {
         return is_token(S.token, type, value);
-    };
+    }
 
-    function peek() { return S.peeked || (S.peeked = S.input()); };
+    function peek() {
+        return S.peeked || (S.peeked = S.input());
+    }
 
     function next() {
         S.prev = S.token;
@@ -740,11 +739,11 @@ function parse($TEXT, options) {
             S.token.type == "string" || is("punc", ";")
         );
         return S.token;
-    };
+    }
 
     function prev() {
         return S.prev;
-    };
+    }
 
     function croak(msg, line, col, pos) {
         var ctx = S.input.context();
@@ -753,26 +752,28 @@ function parse($TEXT, options) {
                  line != null ? line : ctx.tokline,
                  col != null ? col : ctx.tokcol,
                  pos != null ? pos : ctx.tokpos);
-    };
+    }
 
     function token_error(token, msg) {
         croak(msg, token.line, token.col);
-    };
+    }
 
     function unexpected(token) {
         if (token == null)
             token = S.token;
         token_error(token, "Unexpected token: " + token.type + " (" + token.value + ")");
-    };
+    }
 
     function expect_token(type, val) {
         if (is(type, val)) {
             return next();
         }
         token_error(S.token, "Unexpected token " + S.token.type + " «" + S.token.value + "»" + ", expected " + type + " «" + val + "»");
-    };
+    }
 
-    function expect(punc) { return expect_token("punc", punc); };
+    function expect(punc) {
+        return expect_token("punc", punc);
+    }
 
     function has_newline_before(token) {
         return token.nlb || !all(token.comments_before, function(comment) {
@@ -783,19 +784,19 @@ function parse($TEXT, options) {
     function can_insert_semicolon() {
         return !options.strict
             && (is("eof") || is("punc", "}") || has_newline_before(S.token));
-    };
+    }
 
     function semicolon(optional) {
         if (is("punc", ";")) next();
         else if (!optional && !can_insert_semicolon()) unexpected();
-    };
+    }
 
     function parenthesised() {
         expect("(");
         var exp = expression(true);
         expect(")");
         return exp;
-    };
+    }
 
     function embed_tokens(parser) {
         return function() {
@@ -806,14 +807,14 @@ function parse($TEXT, options) {
             expr.end = end;
             return expr;
         };
-    };
+    }
 
     function handle_regexp() {
         if (is("operator", "/") || is("operator", "/=")) {
             S.peeked = null;
             S.token = S.input(S.token.value.substr(1)); // force regexp
         }
-    };
+    }
 
     var statement = embed_tokens(function(strict_defun) {
         handle_regexp();
@@ -969,7 +970,9 @@ function parse($TEXT, options) {
 
     function labeled_statement() {
         var label = as_symbol(AST_Label);
-        if (find_if(function(l){ return l.name == label.name }, S.labels)) {
+        if (!all(S.labels, function(l) {
+            return l.name != label.name;
+        })) {
             // ECMA-262, 12.12: An ECMAScript program is considered
             // syntactically incorrect if it contains a
             // LabelledStatement that is enclosed by a
@@ -993,11 +996,11 @@ function parse($TEXT, options) {
             });
         }
         return new AST_LabeledStatement({ body: stat, label: label });
-    };
+    }
 
     function simple_statement(tmp) {
         return new AST_SimpleStatement({ body: (tmp = expression(true), semicolon(), tmp) });
-    };
+    }
 
     function break_cont(type) {
         var label = null, ldef;
@@ -1005,18 +1008,17 @@ function parse($TEXT, options) {
             label = as_symbol(AST_LabelRef, true);
         }
         if (label != null) {
-            ldef = find_if(function(l){ return l.name == label.name }, S.labels);
-            if (!ldef)
-                croak("Undefined label " + label.name);
+            ldef = find_if(function(l) {
+                return l.name == label.name;
+            }, S.labels);
+            if (!ldef) croak("Undefined label " + label.name);
             label.thedef = ldef;
-        }
-        else if (S.in_loop == 0)
-            croak(type.TYPE + " not inside a loop or switch");
+        } else if (S.in_loop == 0) croak(type.TYPE + " not inside a loop or switch");
         semicolon();
         var stat = new type({ label: label });
         if (ldef) ldef.references.push(stat);
         return stat;
-    };
+    }
 
     function for_() {
         expect("(");
@@ -1037,7 +1039,7 @@ function parse($TEXT, options) {
             }
         }
         return regular_for(init);
-    };
+    }
 
     function regular_for(init) {
         expect(";");
@@ -1051,7 +1053,7 @@ function parse($TEXT, options) {
             step      : step,
             body      : in_loop(statement)
         });
-    };
+    }
 
     function for_in(init) {
         var obj = expression(true);
@@ -1061,7 +1063,7 @@ function parse($TEXT, options) {
             object : obj,
             body   : in_loop(statement)
         });
-    };
+    }
 
     var function_ = function(ctor) {
         var in_statement = ctor === AST_Defun;
@@ -1111,7 +1113,7 @@ function parse($TEXT, options) {
             body        : body,
             alternative : belse
         });
-    };
+    }
 
     function block_(strict_defun) {
         expect("{");
@@ -1122,7 +1124,7 @@ function parse($TEXT, options) {
         }
         next();
         return a;
-    };
+    }
 
     function switch_body_() {
         expect("{");
@@ -1157,7 +1159,7 @@ function parse($TEXT, options) {
         if (branch) branch.end = prev();
         next();
         return a;
-    };
+    }
 
     function try_() {
         var body = block_(), bcatch = null, bfinally = null;
@@ -1190,7 +1192,7 @@ function parse($TEXT, options) {
             bcatch   : bcatch,
             bfinally : bfinally
         });
-    };
+    }
 
     function vardefs(no_in) {
         var a = [];
@@ -1206,7 +1208,7 @@ function parse($TEXT, options) {
             next();
         }
         return a;
-    };
+    }
 
     var var_ = function(no_in) {
         return new AST_Var({
@@ -1272,7 +1274,7 @@ function parse($TEXT, options) {
         }
         next();
         return ret;
-    };
+    }
 
     var expr_atom = function(allow_calls) {
         if (is("operator", "new")) {
@@ -1319,7 +1321,7 @@ function parse($TEXT, options) {
             func.end = prev();
             return subscripts(func, allow_calls);
         }
-        if (ATOMIC_START_TOKEN(S.token.type)) {
+        if (ATOMIC_START_TOKEN[S.token.type]) {
             return subscripts(as_atom_node(), allow_calls);
         }
         unexpected();
@@ -1338,7 +1340,7 @@ function parse($TEXT, options) {
         }
         next();
         return a;
-    };
+    }
 
     var array_ = embed_tokens(function() {
         expect("[");
@@ -1404,7 +1406,7 @@ function parse($TEXT, options) {
         var tmp = S.token;
         switch (tmp.type) {
           case "operator":
-            if (!KEYWORDS(tmp.value)) unexpected();
+            if (!KEYWORDS[tmp.value]) unexpected();
           case "num":
           case "string":
           case "name":
@@ -1415,14 +1417,14 @@ function parse($TEXT, options) {
           default:
             unexpected();
         }
-    };
+    }
 
     function as_name() {
         var tmp = S.token;
         if (tmp.type != "name") unexpected();
         next();
         return tmp.value;
-    };
+    }
 
     function _make_symbol(type) {
         var name = S.token.value;
@@ -1431,7 +1433,7 @@ function parse($TEXT, options) {
             start : S.token,
             end   : S.token
         });
-    };
+    }
 
     function strict_verify_symbol(sym) {
         if (sym.name == "arguments" || sym.name == "eval")
@@ -1449,7 +1451,7 @@ function parse($TEXT, options) {
         }
         next();
         return sym;
-    };
+    }
 
     function mark_pure(call) {
         var start = call.start;
@@ -1502,7 +1504,7 @@ function parse($TEXT, options) {
 
     var maybe_unary = function(allow_calls) {
         var start = S.token;
-        if (is("operator") && UNARY_PREFIX(start.value)) {
+        if (is("operator") && UNARY_PREFIX[start.value]) {
             next();
             handle_regexp();
             var ex = make_unary(AST_UnaryPrefix, start, maybe_unary(allow_calls));
@@ -1511,7 +1513,7 @@ function parse($TEXT, options) {
             return ex;
         }
         var val = expr_atom(allow_calls);
-        while (is("operator") && UNARY_POSTFIX(S.token.value) && !has_newline_before(S.token)) {
+        while (is("operator") && UNARY_POSTFIX[S.token.value] && !has_newline_before(S.token)) {
             val = make_unary(AST_UnaryPostfix, S.token, val);
             val.start = start;
             val.end = S.token;
@@ -1534,7 +1536,7 @@ function parse($TEXT, options) {
             break;
         }
         return new ctor({ operator: op, expression: expr });
-    };
+    }
 
     var expr_op = function(left, min_prec, no_in) {
         var op = is("operator") ? S.token.value : null;
@@ -1556,7 +1558,7 @@ function parse($TEXT, options) {
 
     function expr_ops(no_in) {
         return expr_op(maybe_unary(true), 0, no_in);
-    };
+    }
 
     var maybe_conditional = function(no_in) {
         var start = S.token;
@@ -1578,12 +1580,12 @@ function parse($TEXT, options) {
 
     function is_assignable(expr) {
         return expr instanceof AST_PropAccess || expr instanceof AST_SymbolRef;
-    };
+    }
 
     var maybe_assign = function(no_in) {
         var start = S.token;
         var left = maybe_conditional(no_in), val = S.token.value;
-        if (is("operator") && ASSIGNMENT(val)) {
+        if (is("operator") && ASSIGNMENT[val]) {
             if (is_assignable(left)) {
                 next();
                 return new AST_Assign({
@@ -1620,13 +1622,13 @@ function parse($TEXT, options) {
         var ret = cont();
         --S.in_loop;
         return ret;
-    };
+    }
 
     if (options.expression) {
         return expression(true);
     }
 
-    return (function(){
+    return function() {
         var start = S.token;
         var body = [];
         S.input.push_directives_stack();
@@ -1642,6 +1644,5 @@ function parse($TEXT, options) {
             toplevel = new AST_Toplevel({ start: start, body: body, end: end });
         }
         return toplevel;
-    })();
-
-};
+    }();
+}

lib/propmangle.js

@@ -150,6 +150,10 @@ function mangle_properties(ast, options) {
         else if (node instanceof AST_Sub) {
             addStrings(node.property, add);
         }
+        else if (node instanceof AST_Call
+            && node.expression.print_to_string() == "Object.defineProperty") {
+            addStrings(node.args[1], add);
+        }
     }));
 
     // step 2: transform the tree, renaming properties
@@ -167,6 +171,10 @@ function mangle_properties(ast, options) {
         else if (!options.keep_quoted && node instanceof AST_Sub) {
             node.property = mangleStrings(node.property);
         }
+        else if (node instanceof AST_Call
+            && node.expression.print_to_string() == "Object.defineProperty") {
+            node.args[1] = mangleStrings(node.args[1]);
+        }
     }));
 
     // only function declarations after this line

lib/scope.js

@@ -55,7 +55,7 @@ function SymbolDef(scope, orig, init) {
     this.mangled_name = null;
     this.undeclared = false;
     this.id = SymbolDef.next_id++;
-};
+}
 
 SymbolDef.next_id = 1;
 
@@ -63,12 +63,12 @@ SymbolDef.prototype = {
     unmangleable: function(options) {
         if (!options) options = {};
 
-        return (this.global && !options.toplevel)
+        return this.global && !options.toplevel
             || this.undeclared
-            || (!options.eval && (this.scope.uses_eval || this.scope.uses_with))
-            || (options.keep_fnames
+            || !options.eval && this.scope.pinned()
+            || options.keep_fnames
                 && (this.orig[0] instanceof AST_SymbolLambda
-                    || this.orig[0] instanceof AST_SymbolDefun));
+                    || this.orig[0] instanceof AST_SymbolDefun);
     },
     mangle: function(options) {
         var cache = options.cache && options.cache.props;
@@ -100,7 +100,6 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
     // pass 1: setup scope chaining and handle definitions
     var self = this;
     var scope = self.parent_scope = null;
-    var labels = new Dictionary();
     var defun = null;
     var tw = new TreeWalker(function(node, descend) {
         if (node instanceof AST_Catch) {
@@ -115,25 +114,12 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
             node.init_scope_vars(scope);
             var save_scope = scope;
             var save_defun = defun;
-            var save_labels = labels;
             defun = scope = node;
-            labels = new Dictionary();
             descend();
             scope = save_scope;
             defun = save_defun;
-            labels = save_labels;
             return true;        // don't descend again in TreeWalker
         }
-        if (node instanceof AST_LabeledStatement) {
-            var l = node.label;
-            if (labels.has(l.name)) {
-                throw new Error(string_template("Label {name} defined twice", l));
-            }
-            labels.set(l.name, l);
-            descend();
-            labels.del(l.name);
-            return true;        // no descend again
-        }
         if (node instanceof AST_With) {
             for (var s = scope; s; s = s.parent_scope)
                 s.uses_with = true;
@@ -171,15 +157,6 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
         else if (node instanceof AST_SymbolCatch) {
             scope.def_variable(node).defun = defun;
         }
-        else if (node instanceof AST_LabelRef) {
-            var sym = labels.get(node.name);
-            if (!sym) throw new Error(string_template("Undefined label {name} [{line},{col}]", {
-                name: node.name,
-                line: node.start.line,
-                col: node.start.col
-            }));
-            node.thedef = sym;
-        }
     });
     self.walk(tw);
 
@@ -367,7 +344,7 @@ function next_mangled_name(scope, options, def) {
     }
     while (true) {
         name = base54(++scope.cname);
-        if (in_use[name] || !is_identifier(name) || member(name, options.reserved)) continue;
+        if (in_use[name] || !is_identifier(name) || options.reserved.has[name]) continue;
         if (!names[name]) break;
         holes.push(scope.cname);
     }
@@ -387,8 +364,7 @@ AST_Symbol.DEFMETHOD("unmangleable", function(options){
 AST_Label.DEFMETHOD("unmangleable", return_false);
 
 AST_Symbol.DEFMETHOD("unreferenced", function() {
-    return this.definition().references.length == 0
-        && !(this.scope.uses_eval || this.scope.uses_with);
+    return !this.definition().references.length && !this.scope.pinned();
 });
 
 AST_Symbol.DEFMETHOD("definition", function() {
@@ -410,6 +386,7 @@ function _default_mangler_options(options) {
     if (!Array.isArray(options.reserved)) options.reserved = [];
     // Never mangle arguments
     push_uniq(options.reserved, "arguments");
+    options.reserved.has = makePredicate(options.reserved);
     return options;
 }
 
@@ -457,25 +434,27 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
             var redef = def.redefined();
             if (redef) {
                 redefined.push(def);
-                def.references.forEach(function(ref) {
-                    ref.thedef = redef;
-                    ref.reference(options);
-                    ref.thedef = def;
-                });
+                reference(node.argname);
+                def.references.forEach(reference);
             }
             descend();
             if (!redef) mangle(def);
             return true;
         }
+
+        function reference(sym) {
+            sym.thedef = redef;
+            sym.reference(options);
+            sym.thedef = def;
+        }
     });
     this.walk(tw);
     redefined.forEach(mangle);
 
     function mangle(def) {
-        if (!member(def.name, options.reserved)) {
+        if (options.reserved.has[def.name]) return;
         def.mangle(options);
     }
-    }
 });
 
 AST_Toplevel.DEFMETHOD("find_colliding_names", function(options) {
@@ -524,7 +503,7 @@ AST_Toplevel.DEFMETHOD("expand_names", function(options) {
     function rename(def) {
         if (def.global && options.cache) return;
         if (def.unmangleable(options)) return;
-        if (member(def.name, options.reserved)) return;
+        if (options.reserved.has[def.name]) return;
         var d = def.redefined();
         def.name = d ? d.name : next_name();
         def.orig.forEach(function(sym) {
@@ -576,17 +555,21 @@ AST_Toplevel.DEFMETHOD("compute_char_frequency", function(options){
 });
 
 var base54 = (function() {
-    var leading = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_".split("");
-    var digits = "0123456789".split("");
+    var freq = Object.create(null);
+    function init(chars) {
+        var array = [];
+        for (var i = 0, len = chars.length; i < len; i++) {
+            var ch = chars[i];
+            array.push(ch);
+            freq[ch] = -1e-2 * i;
+        }
+        return array;
+    }
+    var digits = init("0123456789");
+    var leading = init("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_");
     var chars, frequency;
     function reset() {
-        frequency = Object.create(null);
-        leading.forEach(function(ch) {
-            frequency[ch] = 0;
-        });
-        digits.forEach(function(ch) {
-            frequency[ch] = 0;
-        });
+        frequency = Object.create(freq);
     }
     base54.consider = function(str, delta) {
         for (var i = str.length; --i >= 0;) {
@@ -597,7 +580,7 @@ var base54 = (function() {
         return frequency[b] - frequency[a];
     }
     base54.sort = function() {
-        chars = mergeSort(leading, compare).concat(mergeSort(digits, compare));
+        chars = leading.sort(compare).concat(digits.sort(compare));
     };
     base54.reset = reset;
     reset();
@@ -611,6 +594,6 @@ var base54 = (function() {
             base = 64;
         } while (num > 0);
         return ret;
-    };
+    }
     return base54;
 })();

lib/sourcemap.js

@@ -49,49 +49,56 @@ function SourceMap(options) {
         file: null,
         root: null,
         orig: null,
-
         orig_line_diff: 0,
         dest_line_diff: 0,
-    });
+    }, true);
     var generator = new MOZ_SourceMap.SourceMapGenerator({
         file: options.file,
         sourceRoot: options.root
     });
-    var orig_map = options.orig && new MOZ_SourceMap.SourceMapConsumer(options.orig);
-
-    if (orig_map && Array.isArray(options.orig.sources)) {
-        orig_map._sources.toArray().forEach(function(source) {
-            var sourceContent = orig_map.sourceContentFor(source, true);
-            if (sourceContent) {
-                generator.setSourceContent(source, sourceContent);
-            }
+    var maps = options.orig && Object.create(null);
+    if (maps) for (var source in options.orig) {
+        var map = new MOZ_SourceMap.SourceMapConsumer(options.orig[source]);
+        if (Array.isArray(options.orig[source].sources)) {
+            map._sources.toArray().forEach(function(source) {
+                var sourceContent = map.sourceContentFor(source, true);
+                if (sourceContent) generator.setSourceContent(source, sourceContent);
             });
         }
-
-    function add(source, gen_line, gen_col, orig_line, orig_col, name) {
-        if (orig_map) {
-            var info = orig_map.originalPositionFor({
+        maps[source] = map;
+    }
+    return {
+        add: function(source, gen_line, gen_col, orig_line, orig_col, name) {
+            var map = maps && maps[source];
+            if (map) {
+                var info = map.originalPositionFor({
                     line: orig_line,
                     column: orig_col
                 });
-            if (info.source === null) {
-                return;
-            }
+                if (info.source === null) return;
                 source = info.source;
                 orig_line = info.line;
                 orig_col = info.column;
                 name = info.name || name;
             }
             generator.addMapping({
-            generated : { line: gen_line + options.dest_line_diff, column: gen_col },
-            original  : { line: orig_line + options.orig_line_diff, column: orig_col },
+                name: name,
                 source: source,
-            name      : name
+                generated: {
+                    line: gen_line + options.dest_line_diff,
+                    column: gen_col
+                },
+                original: {
+                    line: orig_line + options.orig_line_diff,
+                    column: orig_col
+                }
             });
+        },
+        get: function() {
+            return generator;
+        },
+        toString: function() {
+            return JSON.stringify(generator.toJSON());
+        }
     };
-    return {
-        add        : add,
-        get        : function() { return generator },
-        toString   : function() { return JSON.stringify(generator.toJSON()); }
-    };
-};
+}

lib/transform.js

@@ -43,8 +43,6 @@
 
 "use strict";
 
-// Tree transformer helpers.
-
 function TreeTransformer(before, after) {
     TreeWalker.call(this);
     this.before = before;
@@ -52,163 +50,136 @@ function TreeTransformer(before, after) {
 }
 TreeTransformer.prototype = new TreeWalker;
 
-(function(undefined){
-
-    function _(node, descend) {
-        node.DEFMETHOD("transform", function(tw, in_list){
-            var x, y;
-            tw.push(this);
-            if (tw.before) x = tw.before(this, descend, in_list);
-            if (x === undefined) {
-                x = this;
-                descend(x, tw);
-                if (tw.after) {
-                    y = tw.after(x, in_list);
-                    if (y !== undefined) x = y;
-                }
-            }
-            tw.pop();
-            return x;
-        });
-    };
-
+(function(DEF) {
     function do_list(list, tw) {
         return MAP(list, function(node) {
             return node.transform(tw, true);
         });
-    };
+    }
 
-    _(AST_Node, noop);
-
-    _(AST_LabeledStatement, function(self, tw){
+    DEF(AST_Node, noop);
+    DEF(AST_LabeledStatement, function(self, tw) {
         self.label = self.label.transform(tw);
         self.body = self.body.transform(tw);
     });
-
-    _(AST_SimpleStatement, function(self, tw){
+    DEF(AST_SimpleStatement, function(self, tw) {
         self.body = self.body.transform(tw);
     });
-
-    _(AST_Block, function(self, tw){
+    DEF(AST_Block, function(self, tw) {
         self.body = do_list(self.body, tw);
     });
-
-    _(AST_DWLoop, function(self, tw){
+    DEF(AST_Do, function(self, tw) {
+        self.body = self.body.transform(tw);
+        self.condition = self.condition.transform(tw);
+    });
+    DEF(AST_While, function(self, tw) {
         self.condition = self.condition.transform(tw);
         self.body = self.body.transform(tw);
     });
-
-    _(AST_For, function(self, tw){
+    DEF(AST_For, function(self, tw) {
         if (self.init) self.init = self.init.transform(tw);
         if (self.condition) self.condition = self.condition.transform(tw);
         if (self.step) self.step = self.step.transform(tw);
         self.body = self.body.transform(tw);
     });
-
-    _(AST_ForIn, function(self, tw){
+    DEF(AST_ForIn, function(self, tw) {
         self.init = self.init.transform(tw);
         self.object = self.object.transform(tw);
         self.body = self.body.transform(tw);
     });
-
-    _(AST_With, function(self, tw){
+    DEF(AST_With, function(self, tw) {
         self.expression = self.expression.transform(tw);
         self.body = self.body.transform(tw);
     });
-
-    _(AST_Exit, function(self, tw){
+    DEF(AST_Exit, function(self, tw) {
         if (self.value) self.value = self.value.transform(tw);
     });
-
-    _(AST_LoopControl, function(self, tw){
+    DEF(AST_LoopControl, function(self, tw) {
         if (self.label) self.label = self.label.transform(tw);
     });
-
-    _(AST_If, function(self, tw){
+    DEF(AST_If, function(self, tw) {
         self.condition = self.condition.transform(tw);
         self.body = self.body.transform(tw);
         if (self.alternative) self.alternative = self.alternative.transform(tw);
     });
-
-    _(AST_Switch, function(self, tw){
+    DEF(AST_Switch, function(self, tw) {
         self.expression = self.expression.transform(tw);
         self.body = do_list(self.body, tw);
     });
-
-    _(AST_Case, function(self, tw){
+    DEF(AST_Case, function(self, tw) {
         self.expression = self.expression.transform(tw);
         self.body = do_list(self.body, tw);
     });
-
-    _(AST_Try, function(self, tw){
+    DEF(AST_Try, function(self, tw) {
         self.body = do_list(self.body, tw);
         if (self.bcatch) self.bcatch = self.bcatch.transform(tw);
         if (self.bfinally) self.bfinally = self.bfinally.transform(tw);
     });
-
-    _(AST_Catch, function(self, tw){
+    DEF(AST_Catch, function(self, tw) {
         self.argname = self.argname.transform(tw);
         self.body = do_list(self.body, tw);
     });
-
-    _(AST_Definitions, function(self, tw){
+    DEF(AST_Definitions, function(self, tw) {
         self.definitions = do_list(self.definitions, tw);
     });
-
-    _(AST_VarDef, function(self, tw){
+    DEF(AST_VarDef, function(self, tw) {
         self.name = self.name.transform(tw);
         if (self.value) self.value = self.value.transform(tw);
     });
-
-    _(AST_Lambda, function(self, tw){
+    DEF(AST_Lambda, function(self, tw) {
         if (self.name) self.name = self.name.transform(tw);
         self.argnames = do_list(self.argnames, tw);
         self.body = do_list(self.body, tw);
     });
-
-    _(AST_Call, function(self, tw){
+    DEF(AST_Call, function(self, tw) {
         self.expression = self.expression.transform(tw);
         self.args = do_list(self.args, tw);
     });
-
-    _(AST_Sequence, function(self, tw){
+    DEF(AST_Sequence, function(self, tw) {
         self.expressions = do_list(self.expressions, tw);
     });
-
-    _(AST_Dot, function(self, tw){
+    DEF(AST_Dot, function(self, tw) {
         self.expression = self.expression.transform(tw);
     });
-
-    _(AST_Sub, function(self, tw){
+    DEF(AST_Sub, function(self, tw) {
         self.expression = self.expression.transform(tw);
         self.property = self.property.transform(tw);
     });
-
-    _(AST_Unary, function(self, tw){
+    DEF(AST_Unary, function(self, tw) {
         self.expression = self.expression.transform(tw);
     });
-
-    _(AST_Binary, function(self, tw){
+    DEF(AST_Binary, function(self, tw) {
         self.left = self.left.transform(tw);
         self.right = self.right.transform(tw);
     });
-
-    _(AST_Conditional, function(self, tw){
+    DEF(AST_Conditional, function(self, tw) {
         self.condition = self.condition.transform(tw);
         self.consequent = self.consequent.transform(tw);
         self.alternative = self.alternative.transform(tw);
     });
-
-    _(AST_Array, function(self, tw){
+    DEF(AST_Array, function(self, tw) {
         self.elements = do_list(self.elements, tw);
     });
-
-    _(AST_Object, function(self, tw){
+    DEF(AST_Object, function(self, tw) {
         self.properties = do_list(self.properties, tw);
     });
-
-    _(AST_ObjectProperty, function(self, tw){
+    DEF(AST_ObjectProperty, function(self, tw) {
         self.value = self.value.transform(tw);
     });
-
-})();
+})(function(node, descend) {
+    node.DEFMETHOD("transform", function(tw, in_list) {
+        var x, y;
+        tw.push(this);
+        if (tw.before) x = tw.before(this, descend, in_list);
+        if (typeof x === "undefined") {
+            x = this;
+            descend(x, tw);
+            if (tw.after) {
+                y = tw.after(x, in_list);
+                if (typeof y !== "undefined") x = y;
+            }
+        }
+        tw.pop();
+        return x;
+    });
+});

lib/utils.js

@@ -45,27 +45,25 @@
 
 function characters(str) {
     return str.split("");
-};
+}
 
 function member(name, array) {
     return array.indexOf(name) >= 0;
-};
+}
 
 function find_if(func, array) {
     for (var i = 0, n = array.length; i < n; ++i) {
-        if (func(array[i]))
-            return array[i];
+        if (func(array[i])) return array[i];
+    }
 }
-};
 
 function repeat_string(str, i) {
     if (i <= 0) return "";
     if (i == 1) return str;
     var d = repeat_string(str, i >> 1);
     d += d;
-    if (i & 1) d += str;
-    return d;
-};
+    return i & 1 ? d + str : d;
+}
 
 function configure_error_stack(fn) {
     Object.defineProperty(fn.prototype, "stack", {
@@ -84,27 +82,23 @@ function configure_error_stack(fn) {
 function DefaultsError(msg, defs) {
     this.message = msg;
     this.defs = defs;
-};
+}
 DefaultsError.prototype = Object.create(Error.prototype);
 DefaultsError.prototype.constructor = DefaultsError;
 DefaultsError.prototype.name = "DefaultsError";
 configure_error_stack(DefaultsError);
 
-DefaultsError.croak = function(msg, defs) {
-    throw new DefaultsError(msg, defs);
-};
-
 function defaults(args, defs, croak) {
-    if (args === true)
-        args = {};
+    if (args === true) args = {};
     var ret = args || {};
-    if (croak) for (var i in ret) if (HOP(ret, i) && !HOP(defs, i))
-        DefaultsError.croak("`" + i + "` is not a supported option", defs);
+    if (croak) for (var i in ret) if (HOP(ret, i) && !HOP(defs, i)) {
+        throw new DefaultsError("`" + i + "` is not a supported option", defs);
+    }
     for (var i in defs) if (HOP(defs, i)) {
         ret[i] = (args && HOP(args, i)) ? args[i] : defs[i];
     }
     return ret;
-};
+}
 
 function merge(obj, ext) {
     var count = 0;
@@ -113,7 +107,7 @@ function merge(obj, ext) {
         count++;
     }
     return count;
-};
+}
 
 function noop() {}
 function return_false() { return false; }
@@ -144,8 +138,8 @@ var MAP = (function(){
                 }
             }
             return is_last;
-        };
-        if (a instanceof Array) {
+        }
+        if (Array.isArray(a)) {
             if (backwards) {
                 for (i = a.length; --i >= 0;) if (doit()) break;
                 ret.reverse();
@@ -158,115 +152,54 @@ var MAP = (function(){
             for (i in a) if (HOP(a, i)) if (doit()) break;
         }
         return top.concat(ret);
-    };
+    }
     MAP.at_top = function(val) { return new AtTop(val) };
     MAP.splice = function(val) { return new Splice(val) };
     MAP.last = function(val) { return new Last(val) };
     var skip = MAP.skip = {};
-    function AtTop(val) { this.v = val };
-    function Splice(val) { this.v = val };
-    function Last(val) { this.v = val };
+    function AtTop(val) { this.v = val }
+    function Splice(val) { this.v = val }
+    function Last(val) { this.v = val }
     return MAP;
 })();
 
 function push_uniq(array, el) {
     if (array.indexOf(el) < 0)
         array.push(el);
-};
+}
 
 function string_template(text, props) {
     return text.replace(/\{(.+?)\}/g, function(str, p) {
         return props && props[p];
     });
-};
+}
 
 function remove(array, el) {
     for (var i = array.length; --i >= 0;) {
         if (array[i] === el) array.splice(i, 1);
     }
-};
-
-function mergeSort(array, cmp) {
-    if (array.length < 2) return array.slice();
-    function merge(a, b) {
-        var r = [], ai = 0, bi = 0, i = 0;
-        while (ai < a.length && bi < b.length) {
-            cmp(a[ai], b[bi]) <= 0
-                ? r[i++] = a[ai++]
-                : r[i++] = b[bi++];
 }
-        if (ai < a.length) r.push.apply(r, a.slice(ai));
-        if (bi < b.length) r.push.apply(r, b.slice(bi));
-        return r;
-    };
-    function _ms(a) {
-        if (a.length <= 1)
-            return a;
-        var m = Math.floor(a.length / 2), left = a.slice(0, m), right = a.slice(m);
-        left = _ms(left);
-        right = _ms(right);
-        return merge(left, right);
-    };
-    return _ms(array);
-};
 
-// this function is taken from Acorn [1], written by Marijn Haverbeke
-// [1] https://github.com/marijnh/acorn
 function makePredicate(words) {
-    if (!(words instanceof Array)) words = words.split(" ");
-    var f = "", cats = [];
-    out: for (var i = 0; i < words.length; ++i) {
-        for (var j = 0; j < cats.length; ++j)
-            if (cats[j][0].length == words[i].length) {
-                cats[j].push(words[i]);
-                continue out;
-            }
-        cats.push([words[i]]);
-    }
-    function quote(word) {
-        return JSON.stringify(word).replace(/[\u2028\u2029]/g, function(s) {
-            switch (s) {
-                case "\u2028": return "\\u2028";
-                case "\u2029": return "\\u2029";
-            }
-            return s;
+    if (!Array.isArray(words)) words = words.split(" ");
+    var map = Object.create(null);
+    words.forEach(function(word) {
+        map[word] = true;
     });
+    return map;
 }
-    function compareTo(arr) {
-        if (arr.length == 1) return f += "return str === " + quote(arr[0]) + ";";
-        f += "switch(str){";
-        for (var i = 0; i < arr.length; ++i) f += "case " + quote(arr[i]) + ":";
-        f += "return true}return false;";
-    }
-    // When there are more than three length categories, an outer
-    // switch first dispatches on the lengths, to save on comparisons.
-    if (cats.length > 3) {
-        cats.sort(function(a, b) {return b.length - a.length;});
-        f += "switch(str.length){";
-        for (var i = 0; i < cats.length; ++i) {
-            var cat = cats[i];
-            f += "case " + cat[0].length + ":";
-            compareTo(cat);
-        }
-        f += "}";
-        // Otherwise, simply generate a flat `switch` statement.
-    } else {
-        compareTo(words);
-    }
-    return new Function("str", f);
-};
 
 function all(array, predicate) {
     for (var i = array.length; --i >= 0;)
         if (!predicate(array[i]))
             return false;
     return true;
-};
+}
 
 function Dictionary() {
     this._values = Object.create(null);
     this._size = 0;
-};
+}
 Dictionary.prototype = {
     set: function(key, val) {
         if (!this.has(key)) ++this._size;
@@ -327,20 +260,22 @@ function HOP(obj, prop) {
 // a statement.
 function first_in_statement(stack) {
     var node = stack.parent(-1);
-    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 ) ||
-            (p instanceof AST_Dot           && p.expression === node ) ||
-            (p instanceof AST_Sub           && p.expression === node ) ||
-            (p instanceof AST_Conditional   && p.condition === node  ) ||
-            (p instanceof AST_Binary        && p.left === node       ) ||
-            (p instanceof AST_UnaryPostfix  && p.expression === node ))
-        {
-            node = p;
-        } else {
+    for (var i = 0, p; p = stack.parent(i++); node = p) {
+        if (p.TYPE == "Call") {
+            if (p.expression === node) continue;
+        } else if (p instanceof AST_Binary) {
+            if (p.left === node) continue;
+        } else if (p instanceof AST_Conditional) {
+            if (p.condition === node) continue;
+        } else if (p instanceof AST_PropAccess) {
+            if (p.expression === node) continue;
+        } else if (p instanceof AST_Sequence) {
+            if (p.expressions[0] === node) continue;
+        } else if (p instanceof AST_Statement) {
+            return p.body === node;
+        } else if (p instanceof AST_UnaryPostfix) {
+            if (p.expression === node) continue;
+        }
         return false;
     }
 }
-}

package.json

@@ -3,7 +3,7 @@
   "description": "JavaScript parser, mangler/compressor and beautifier toolkit",
   "author": "Mihai Bazon <mihai.bazon@gmail.com> (http://lisperator.net/)",
   "license": "BSD-2-Clause",
-  "version": "3.3.16",
+  "version": "3.4.1",
   "engines": {
     "node": ">=0.8.0"
   },
@@ -28,7 +28,6 @@
   },
   "devDependencies": {
     "acorn": "~5.5.3",
-    "mocha": "~3.5.1",
     "semver": "~5.5.0"
   },
   "scripts": {

test/compress/collapse_vars.js

@@ -4056,6 +4056,36 @@ replace_all_var: {
     expect_stdout: "PASS"
 }
 
+replace_all_var_scope: {
+    rename = true;
+    options = {
+        collapse_vars: true,
+        unused: true,
+    }
+    mangle = {}
+    input: {
+        var a = 100, b = 10;
+        (function(r, a) {
+            switch (~a) {
+            case (b += a):
+            case a++:
+            }
+        })(--b, a);
+        console.log(a, b);
+    }
+    expect: {
+        var a = 100, b = 10;
+        (function(c, o) {
+            switch (~a) {
+            case (b += a):
+            case o++:
+            }
+        })(--b, a);
+        console.log(a, b);
+    }
+    expect_stdout: "100 109"
+}
+
 cascade_statement: {
     options = {
         collapse_vars: true,
@@ -4901,6 +4931,27 @@ collapse_rhs_lhs_2: {
     expect_stdout: "PASS"
 }
 
+collapse_rhs_loop: {
+    options = {
+        collapse_vars: true,
+    }
+    input: {
+        var s;
+        s = "<tpl>PASS</tpl>";
+        for (var m, r = /<tpl>(.*)<\/tpl>/; m = s.match(r);)
+            s = s.replace(m[0], m[1]);
+        console.log(s);
+    }
+    expect: {
+        var s;
+        s = "<tpl>PASS</tpl>";
+        for (var m, r = /<tpl>(.*)<\/tpl>/; m = s.match(r);)
+            s = s.replace(m[0], m[1]);
+        console.log(s);
+    }
+    expect_stdout: "PASS"
+}
+
 collapse_rhs_side_effects: {
     options = {
         collapse_vars: true,
@@ -5303,3 +5354,48 @@ issue_2974: {
     }
     expect_stdout: "1"
 }
+
+issue_3032: {
+    options = {
+        collapse_vars: true,
+        pure_getters: true,
+    }
+    input: {
+        console.log({
+            f: function() {
+                this.a = 42;
+                return [ this.a, !1 ];
+            }
+        }.f()[0]);
+    }
+    expect: {
+        console.log({
+            f: function() {
+                this.a = 42;
+                return [ this.a, !1 ];
+            }
+        }.f()[0]);
+    }
+    expect_stdout: "42"
+}
+
+issue_3096: {
+    options = {
+        collapse_vars: true,
+    }
+    input: {
+        console.log(function() {
+            var ar = ["a", "b"];
+            var first = ar.pop();
+            return ar + "" + first;
+        }());
+    }
+    expect: {
+        console.log(function() {
+            var ar = ["a", "b"];
+            var first = ar.pop();
+            return ar + "" + first;
+        }());
+    }
+    expect_stdout: "ab"
+}

test/compress/drop-unused.js

@@ -1814,3 +1814,115 @@ issue_2995: {
     }
     expect_stdout: "PASS"
 }
+
+issue_3146_1: {
+    options = {
+        collapse_vars: true,
+        unused: true,
+    }
+    input: {
+        (function(f) {
+            f("g()");
+        })(function(a) {
+            eval(a);
+            function g(b) {
+                if (!b) b = "PASS";
+                console.log(b);
+            }
+        });
+    }
+    expect: {
+        (function(f) {
+            f("g()");
+        })(function(a) {
+            eval(a);
+            function g(b) {
+                if (!b) b = "PASS";
+                console.log(b);
+            }
+        });
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3146_2: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function(f) {
+            f("g()");
+        })(function(a) {
+            eval(a);
+            function g(b) {
+                if (!b) b = "PASS";
+                console.log(b);
+            }
+        });
+    }
+    expect: {
+        (function(f) {
+            f("g()");
+        })(function(a) {
+            eval(a);
+            function g(b) {
+                if (!b) b = "PASS";
+                console.log(b);
+            }
+        });
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3146_3: {
+    options = {
+        collapse_vars: true,
+        unused: true,
+    }
+    input: {
+        var g = "PASS";
+        (function(f) {
+            var g = "FAIL";
+            f("console.log(g)", g[g]);
+        })(function(a) {
+            eval(a);
+        });
+    }
+    expect: {
+        var g = "PASS";
+        (function(f) {
+            var g = "FAIL";
+            f("console.log(g)", g[g]);
+        })(function(a) {
+            eval(a);
+        });
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3146_4: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        var g = "PASS";
+        (function(f) {
+            var g = "FAIL";
+            f("console.log(g)", g[g]);
+        })(function(a) {
+            eval(a);
+        });
+    }
+    expect: {
+        var g = "PASS";
+        (function(f) {
+            var g = "FAIL";
+            f("console.log(g)", g[g]);
+        })(function(a) {
+            eval(a);
+        });
+    }
+    expect_stdout: "PASS"
+}

test/compress/functions.js

@@ -2051,3 +2051,271 @@ drop_lone_use_strict: {
         }
     }
 }
+
+issue_3016_1: {
+    options = {
+        inline: true,
+        toplevel: true,
+    }
+    input: {
+        var b = 1;
+        do {
+            (function(a) {
+                return a[b];
+                var a;
+            })(3);
+        } while (0);
+        console.log(b);
+    }
+    expect: {
+        var b = 1;
+        do {
+            a = 3,
+            a[b];
+        } while(0);
+        var a;
+        console.log(b);
+    }
+    expect_stdout: "1"
+}
+
+issue_3016_2: {
+    options = {
+        dead_code: true,
+        inline: true,
+        toplevel: true,
+    }
+    input: {
+        var b = 1;
+        do {
+            (function(a) {
+                return a[b];
+                try {
+                    a = 2;
+                } catch (a) {
+                    var a;
+                }
+            })(3);
+        } while (0);
+        console.log(b);
+    }
+    expect: {
+        var b = 1;
+        do {
+            a = 3,
+            a[b];
+        } while(0);
+        var a;
+        console.log(b);
+    }
+    expect_stdout: "1"
+}
+
+issue_3016_2_ie8: {
+    options = {
+        dead_code: true,
+        ie8: true,
+        inline: true,
+        toplevel: true,
+    }
+    input: {
+        var b = 1;
+        do {
+            (function(a) {
+                return a[b];
+                try {
+                    a = 2;
+                } catch (a) {
+                    var a;
+                }
+            })(3);
+        } while (0);
+        console.log(b);
+    }
+    expect: {
+        var b = 1;
+        do {
+            a = 3,
+            a[b];
+        } while(0);
+        var a;
+        console.log(b);
+    }
+    expect_stdout: "1"
+}
+
+issue_3016_3: {
+    options = {
+        dead_code: true,
+        inline: true,
+        toplevel: true,
+    }
+    input: {
+        var b = 1;
+        do {
+            console.log(function() {
+                return a ? "FAIL" : a = "PASS";
+                try {
+                    a = 2;
+                } catch (a) {
+                    var a;
+                }
+            }());
+        } while (b--);
+    }
+    expect: {
+        var b = 1;
+        do {
+            console.log((a = void 0, a ? "FAIL" : a = "PASS"));
+        } while(b--);
+        var a;
+    }
+    expect_stdout: [
+        "PASS",
+        "PASS",
+    ]
+}
+
+issue_3016_3_ie8: {
+    options = {
+        dead_code: true,
+        ie8: true,
+        inline: true,
+        toplevel: true,
+    }
+    input: {
+        var b = 1;
+        do {
+            console.log(function() {
+                return a ? "FAIL" : a = "PASS";
+                try {
+                    a = 2;
+                } catch (a) {
+                    var a;
+                }
+            }());
+        } while (b--);
+    }
+    expect: {
+        var b = 1;
+        do {
+            console.log((a = void 0, a ? "FAIL" : a = "PASS"));
+        } while(b--);
+        var a;
+    }
+    expect_stdout: [
+        "PASS",
+        "PASS",
+    ]
+}
+
+issue_3018: {
+    options = {
+        inline: true,
+        side_effects: true,
+        toplevel: true,
+    }
+    input: {
+        var b = 1, c = "PASS";
+        do {
+            (function() {
+                (function(a) {
+                    a = 0 != (a && (c = "FAIL"));
+                })();
+            })();
+        } while (b--);
+        console.log(c);
+    }
+    expect: {
+        var b = 1, c = "PASS";
+        do {
+            a = void 0,
+            a = 0 != (a && (c = "FAIL"));
+        } while (b--);
+        var a;
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3054: {
+    options = {
+        booleans: true,
+        collapse_vars: true,
+        inline: 1,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        "use strict";
+        function f() {
+            return { a: true };
+        }
+        console.log(function(b) {
+            b = false;
+            return f();
+        }().a, f.call().a);
+    }
+    expect: {
+        "use strict";
+        function f() {
+            return { a: !0 };
+        }
+        console.log(function(b) {
+            return { a: !(b = !1) };
+        }().a, f.call().a);
+    }
+    expect_stdout: "true true"
+}
+
+issue_3076: {
+    options = {
+        dead_code: true,
+        inline: true,
+        sequences: true,
+        unused: true,
+    }
+    input: {
+        var c = "PASS";
+        (function(b) {
+            var n = 2;
+            while (--b + function() {
+                e && (c = "FAIL");
+                e = 5;
+                return 1;
+                try {
+                    var a = 5;
+                } catch (e) {
+                    var e;
+                }
+            }().toString() && --n > 0);
+        })(2);
+        console.log(c);
+    }
+    expect: {
+        var c = "PASS";
+        (function(b) {
+            var n = 2;
+            while (--b + (e = void 0, e && (c = "FAIL"), e = 5, 1).toString() && --n > 0);
+            var e;
+        })(2),
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3125: {
+    options = {
+        inline: true,
+        unsafe: true,
+    }
+    input: {
+        console.log(function() {
+            return "PASS";
+        }.call());
+    }
+    expect: {
+        console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}

test/compress/hoist_props.js

@@ -686,3 +686,173 @@ undefined_key: {
     }
     expect_stdout: "3"
 }
+
+issue_3021: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+    }
+    input: {
+        var a = 1, b = 2;
+        (function() {
+            b = a;
+            if (a++ + b--)
+                return 1;
+            return;
+            var b = {};
+        })();
+        console.log(a, b);
+    }
+    expect: {
+        var a = 1, b = 2;
+        (function() {
+            b = a;
+            if (a++ + b--)
+                return 1;
+            return;
+            var b = {};
+        })();
+        console.log(a, b);
+    }
+    expect_stdout: "2 2"
+}
+
+issue_3046: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(function(a) {
+            do {
+                var b = {
+                    c: a++
+                };
+            } while (b.c && a);
+            return a;
+        }(0));
+    }
+    expect: {
+        console.log(function(a) {
+            do {
+                var b_c = a++;
+            } while (b_c && a);
+            return a;
+        }(0));
+    }
+    expect_stdout: "1"
+}
+
+issue_3071_1: {
+    options = {
+        evaluate: true,
+        inline: true,
+        join_vars: true,
+        hoist_props: true,
+        passes: 3,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var obj = {};
+            obj.one = 1;
+            obj.two = 2;
+            console.log(obj.one);
+        })();
+    }
+    expect: {
+        console.log(1);
+    }
+    expect_stdout: "1"
+}
+
+issue_3071_2: {
+    options = {
+        evaluate: true,
+        inline: true,
+        join_vars: true,
+        hoist_props: true,
+        passes: 3,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            obj = {};
+            obj.one = 1;
+            obj.two = 2;
+            console.log(obj.one);
+            var obj;
+        })();
+    }
+    expect: {
+        console.log(1);
+    }
+    expect_stdout: "1"
+}
+
+issue_3071_2_toplevel: {
+    options = {
+        evaluate: true,
+        inline: true,
+        join_vars: true,
+        hoist_props: true,
+        passes: 3,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            obj = {};
+            obj.one = 1;
+            obj.two = 2;
+            console.log(obj.one);
+            var obj;
+        })();
+    }
+    expect: {
+        console.log(1);
+    }
+    expect_stdout: "1"
+}
+
+issue_3071_3: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+    }
+    input: {
+        var c = 0;
+        (function(a, b) {
+            (function f(o) {
+                var n = 2;
+                while (--b + (o = {
+                    p: c++,
+                }) && --n > 0);
+            })();
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        (function(a, b) {
+            (function f(o) {
+                var n = 2;
+                while (--b + (o = {
+                    p: c++,
+                }) && --n > 0);
+            })();
+        })();
+        console.log(c);
+    }
+    expect_stdout: "2"
+}

test/compress/ie8.js

@@ -464,3 +464,77 @@ issue_2976_2: {
     }
     expect_stdout: "PASS"
 }
+
+issue_3035: {
+    mangle = {
+        ie8: false,
+    }
+    input: {
+        var c = "FAIL";
+        (function(a) {
+            try {
+                throw 1;
+            } catch (b) {
+                try {
+                    throw 0;
+                } catch (a) {
+                    b && (c = "PASS");
+                }
+            }
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = "FAIL";
+        (function(o) {
+            try {
+                throw 1;
+            } catch (t) {
+                try {
+                    throw 0;
+                } catch (o) {
+                    t && (c = "PASS");
+                }
+            }
+        })();
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3035_ie8: {
+    mangle = {
+        ie8: true,
+    }
+    input: {
+        var c = "FAIL";
+        (function(a) {
+            try {
+                throw 1;
+            } catch (b) {
+                try {
+                    throw 0;
+                } catch (a) {
+                    b && (c = "PASS");
+                }
+            }
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = "FAIL";
+        (function(t) {
+            try {
+                throw 1;
+            } catch (o) {
+                try {
+                    throw 0;
+                } catch (t) {
+                    o && (c = "PASS");
+                }
+            }
+        })();
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}

test/compress/issue-782.js

@@ -1,11 +1,31 @@
-remove_redundant_sequence_items: {
-    options = { side_effects: true };
+remove_sequence: {
+    options = {
+        side_effects: true,
+    }
     input: {
         (0, 1, eval)();
         (0, 1, logThis)();
         (0, 1, _decorators.logThis)();
     }
     expect: {
+        eval();
+        logThis();
+        (0, _decorators.logThis)();
+    }
+}
+
+remove_redundant_sequence_items: {
+    options = {
+        side_effects: true,
+    }
+    input: {
+        "use strict";
+        (0, 1, eval)();
+        (0, 1, logThis)();
+        (0, 1, _decorators.logThis)();
+    }
+    expect: {
+        "use strict";
         (0, eval)();
         logThis();
         (0, _decorators.logThis)();
@@ -13,13 +33,17 @@ remove_redundant_sequence_items: {
 }
 
 dont_remove_this_binding_sequence: {
-    options = { side_effects: true };
+    options = {
+        side_effects: true,
+    }
     input: {
+        "use strict";
         (0, eval)();
         (0, logThis)();
         (0, _decorators.logThis)();
     }
     expect: {
+        "use strict";
         (0, eval)();
         logThis();
         (0, _decorators.logThis)();

test/compress/issue-973.js

@@ -3,8 +3,9 @@ this_binding_conditionals: {
         conditionals: true,
         evaluate: true,
         side_effects: true,
-    };
+    }
     input: {
+        "use strict";
         (1 && a)();
         (0 || a)();
         (0 || 1 && a)();
@@ -26,6 +27,7 @@ this_binding_conditionals: {
         (1 ? eval : 0)();
     }
     expect: {
+        "use strict";
         a();
         a();
         a();
@@ -53,13 +55,15 @@ this_binding_collapse_vars: {
         collapse_vars: true,
         toplevel: true,
         unused: true,
-    };
+    }
     input: {
+        "use strict";
         var c = a; c();
         var d = a.b; d();
         var e = eval; e();
     }
     expect: {
+        "use strict";
         a();
         (0, a.b)();
         (0, eval)();
@@ -69,31 +73,88 @@ this_binding_collapse_vars: {
 this_binding_side_effects: {
     options = {
         side_effects : true
-    };
+    }
     input: {
         (function(foo) {
             (0, foo)();
             (0, foo.bar)();
-            (0, eval)('console.log(foo);');
+            (0, eval)("console.log(foo);");
+        }());
+        (function(foo) {
+            "use strict";
+            (0, foo)();
+            (0, foo.bar)();
+            (0, eval)("console.log(foo);");
         }());
         (function(foo) {
             var eval = console;
             (0, foo)();
             (0, foo.bar)();
-            (0, eval)('console.log(foo);');
+            (0, eval)("console.log(foo);");
         }());
     }
     expect: {
         (function(foo) {
             foo();
             (0, foo.bar)();
-            (0, eval)('console.log(foo);');
+            eval("console.log(foo);");
+        }());
+        (function(foo) {
+            "use strict";
+            foo();
+            (0, foo.bar)();
+            (0, eval)("console.log(foo);");
         }());
         (function(foo) {
             var eval = console;
             foo();
             (0, foo.bar)();
-            (0, eval)('console.log(foo);');
+            eval("console.log(foo);");
         }());
     }
 }
+
+this_binding_sequences: {
+    options = {
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(typeof function() {
+            return eval("this");
+        }());
+        console.log(typeof function() {
+            "use strict";
+            return eval("this");
+        }());
+        console.log(typeof function() {
+            return (0, eval)("this");
+        }());
+        console.log(typeof function() {
+            "use strict";
+            return (0, eval)("this");
+        }());
+    }
+    expect: {
+        console.log(typeof function() {
+            return eval("this");
+        }()),
+        console.log(typeof function() {
+            "use strict";
+            return eval("this");
+        }()),
+        console.log(typeof function() {
+            return eval("this");
+        }()),
+        console.log(typeof function() {
+            "use strict";
+            return (0, eval)("this");
+        }());
+    }
+    expect_stdout: [
+        "object",
+        "undefined",
+        "object",
+        "object",
+    ]
+}

test/compress/max_line_len.js

@@ -8,14 +8,14 @@ too_short: {
         }
     }
     expect_exact: [
-        'function f(a){',
-        'return{',
-        'c:42,',
-        'd:a(),',
-        'e:"foo"}}',
+        "function f(",
+        "a){return{",
+        "c:42,d:a(",
+        '),e:"foo"}',
+        "}",
     ]
     expect_warnings: [
-        "WARN: Output exceeds 10 characters"
+        "WARN: Output exceeds 10 characters",
     ]
 }
 
@@ -29,11 +29,25 @@ just_enough: {
         }
     }
     expect_exact: [
-        'function f(a){',
-        'return{c:42,',
+        "function f(a){",
+        "return{c:42,",
         'd:a(),e:"foo"}',
-        '}',
-    ]
-    expect_warnings: [
+        "}",
     ]
+    expect_warnings: []
+}
+
+issue_304: {
+    beautify = {
+        max_line_len: 10,
+    }
+    input: {
+        var a = 0, b = 0, c = 0, d = 0, e = 0;
+    }
+    expect_exact: [
+        "var a=0,",
+        "b=0,c=0,",
+        "d=0,e=0;",
+    ]
+    expect_warnings: []
 }

test/compress/numbers.js

@@ -1,5 +1,9 @@
 hex_numbers_in_parentheses_for_prototype_functions: {
+    beautify = {
+        beautify: true,
+    }
     input: {
+        function f() {
             (-2);
             (-2).toFixed(0);
 
@@ -9,13 +13,37 @@ hex_numbers_in_parentheses_for_prototype_functions: {
             (0.2);
             (0.2).toFixed(0);
 
+            (2.34e20);
+            (2.34e20).toFixed(0);
+
             (0.00000002);
             (0.00000002).toFixed(0);
 
             (1000000000000000128);
             (1000000000000000128).toFixed(0);
+
+            (-1000000000000000128);
+            (-1000000000000000128).toFixed(0);
         }
-    expect_exact: "-2;(-2).toFixed(0);2;2..toFixed(0);.2;.2.toFixed(0);2e-8;2e-8.toFixed(0);0xde0b6b3a7640080;(0xde0b6b3a7640080).toFixed(0);"
+    }
+    expect_exact: [
+        "function f() {",
+        "    -2;",
+        "    (-2).toFixed(0);",
+        "    2;",
+        "    2..toFixed(0);",
+        "    .2;",
+        "    .2.toFixed(0);",
+        "    234e18;",
+        "    234e18.toFixed(0);",
+        "    2e-8;",
+        "    2e-8.toFixed(0);",
+        "    0xde0b6b3a7640080;",
+        "    (0xde0b6b3a7640080).toFixed(0);",
+        "    -0xde0b6b3a7640080;",
+        "    (-0xde0b6b3a7640080).toFixed(0);",
+        "}",
+    ]
 }
 
 comparisons: {

test/compress/properties.js

@@ -1208,6 +1208,37 @@ join_object_assignments_3: {
     expect_stdout: "PASS"
 }
 
+join_object_assignments_4: {
+    options = {
+        join_vars: true,
+        sequences: true,
+    }
+    input: {
+        var o;
+        console.log(o);
+        o = {};
+        o.a = "foo";
+        console.log(o.b);
+        o.b = "bar";
+        console.log(o.a);
+    }
+    expect: {
+        var o;
+        console.log(o),
+        o = {
+            a: "foo",
+        },
+        console.log(o.b),
+        o.b = "bar",
+        console.log(o.a);
+    }
+    expect_stdout: [
+        "undefined",
+        "undefined",
+        "foo",
+    ]
+}
+
 join_object_assignments_return_1: {
     options = {
         join_vars: true,
@@ -1640,3 +1671,164 @@ issue_2893_2: {
     }
     expect_stdout: "PASS"
 }
+
+issue_869_1: {
+    mangle = {
+        properties: {
+            reserved: [ "get" ]
+        },
+    }
+    input: {
+        var o = { p: "FAIL" };
+        Object.defineProperty(o, "p", {
+            get: function() {
+                return "PASS";
+            }
+        });
+        console.log(o.p);
+    }
+    expect: {
+        var o = { o: "FAIL" };
+        Object.defineProperty(o, "o", {
+            get: function() {
+                return "PASS";
+            }
+        });
+        console.log(o.o);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_869_2: {
+    mangle = {
+        properties: {
+            reserved: [ "get" ]
+        },
+    }
+    input: {
+        var o = { p: "FAIL" };
+        Object.defineProperties(o, {
+            p: {
+                get: function() {
+                    return "PASS";
+                }
+            }
+        });
+        console.log(o.p);
+    }
+    expect: {
+        var o = { o: "FAIL" };
+        Object.defineProperties(o, {
+            o: {
+                get: function() {
+                    return "PASS";
+                }
+            }
+        });
+        console.log(o.o);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3188_1: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        properties: true,
+        reduce_vars: true,
+        side_effects: true,
+    }
+    input: {
+        (function() {
+            function f() {
+                console.log(this.p);
+            }
+            (function() {
+                var o = {
+                    p: "PASS",
+                    f: f
+                };
+                o.f();
+            })();
+        })();
+    }
+    expect: {
+        (function() {
+            function f() {
+                console.log(this.p);
+            }
+            ({
+                p: "PASS",
+                f: f
+            }).f();
+            var o;
+        })();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3188_2: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        properties: true,
+        reduce_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var f = function() {
+                console.log(this.p);
+            };
+            function g() {
+                var o = {
+                    p: "PASS",
+                    f: f
+                };
+                o.f();
+            }
+            g();
+        })();
+    }
+    expect: {
+        ({
+            p: "PASS",
+            f: function() {
+                console.log(this.p);
+            }
+        }).f();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3188_3: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        properties: true,
+        reduce_vars: true,
+        side_effects: true,
+    }
+    input: {
+        (function() {
+            function f() {
+                console.log(this[0]);
+            }
+            (function() {
+                var o = ["PASS", f];
+                o[1]();
+            })();
+        })();
+    }
+    expect: {
+        (function() {
+            function f() {
+                console.log(this[0]);
+            }
+            ["PASS", f][1]();
+            var o;
+        })();
+    }
+    expect_stdout: "PASS"
+}

test/compress/pure_funcs.js

@@ -535,3 +535,110 @@ issue_2705_6: {
         "/* */new(/* */a()||b())(c(),d());",
     ]
 }
+
+issue_3065_1: {
+    options = {
+        inline: true,
+        pure_funcs: [ "pureFunc" ],
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function modifyWrapper(a, f, wrapper) {
+            wrapper.a = a;
+            wrapper.f = f;
+            return wrapper;
+        }
+        function pureFunc(fun) {
+            return modifyWrapper(1, fun, function(a) {
+                return fun(a);
+            });
+        }
+        var unused = pureFunc(function(x) {
+            return x;
+        });
+    }
+    expect: {}
+}
+
+issue_3065_2: {
+    rename = true
+    options = {
+        inline: true,
+        pure_funcs: [ "pureFunc" ],
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    mangle = {
+        reserved: [ "pureFunc" ],
+        toplevel: true,
+    }
+    input: {
+        function modifyWrapper(a, f, wrapper) {
+            wrapper.a = a;
+            wrapper.f = f;
+            return wrapper;
+        }
+        function pureFunc(fun) {
+            return modifyWrapper(1, fun, function(a) {
+                return fun(a);
+            });
+        }
+        var unused = pureFunc(function(x) {
+            return x;
+        });
+    }
+    expect: {}
+}
+
+issue_3065_3: {
+    options = {
+        pure_funcs: [ "debug" ],
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function debug(msg) {
+            console.log(msg);
+        }
+        debug(function() {
+            console.log("PASS");
+            return "FAIL";
+        }());
+    }
+    expect: {
+        (function() {
+            console.log("PASS");
+        })();
+    }
+}
+
+issue_3065_4: {
+    options = {
+        pure_funcs: [ "debug" ],
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var debug = function(msg) {
+            console.log(msg);
+        };
+        debug(function() {
+            console.log("PASS");
+            return "FAIL";
+        }());
+    }
+    expect: {
+        (function() {
+            console.log("PASS");
+        })();
+    }
+}

test/compress/reduce_vars.js

@@ -1476,18 +1476,18 @@ defun_redefine: {
             };
             return g() + h();
         }
+        console.log(f());
     }
     expect:  {
         function f() {
-            function g() {
-                return 1;
-            }
-            g = function() {
+            (function() {
                 return 3;
-            };
-            return g() + 2;
+            });
+            return 3 + 2;
         }
+        console.log(f());
     }
+    expect_stdout: "5"
 }
 
 func_inline: {
@@ -1527,23 +1527,37 @@ func_modified: {
     }
     input: {
         function f(a) {
-            function a() { return 1; }
-            function b() { return 2; }
-            function c() { return 3; }
+            function a() {
+                return 1;
+            }
+            function b() {
+                return 2;
+            }
+            function c() {
+                return 3;
+            }
             b.inject = [];
-            c = function() { return 4; };
+            c = function() {
+                return 4;
+            };
             return a() + b() + c();
         }
+        console.log(f());
     }
     expect: {
         function f(a) {
-            function b() { return 2; }
-            function c() { return 3; }
+            function b() {
+                return 2;
+            }
             b.inject = [];
-            c = function() { return 4; };
-            return 1 + 2 + c();
+            (function() {
+                return 4;
+            });
+            return 1 + 2 + 4;
         }
+        console.log(f());
     }
+    expect_stdout: "7"
 }
 
 defun_label: {
@@ -5054,9 +5068,7 @@ defun_var_1: {
         console.log(typeof a, typeof b);
     }
     expect: {
-        var a = 42;
-        function a() {}
-        console.log(typeof a, "function");
+        console.log("number", "function");
     }
     expect_stdout: "number function"
 }
@@ -5076,9 +5088,7 @@ defun_var_2: {
         console.log(typeof a, typeof b);
     }
     expect: {
-        function a() {}
-        var a = 42;
-        console.log(typeof a, "function");
+        console.log("number", "function");
     }
     expect_stdout: "number function"
 }
@@ -5582,3 +5592,814 @@ issue_2992: {
     }
     expect_stdout: "PASS"
 }
+
+issue_3042_1: {
+    options = {
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function f() {}
+        var a = [ 1, 2 ].map(function() {
+            return new f();
+        });
+        console.log(a[0].constructor === a[1].constructor);
+    }
+    expect: {
+        function f() {}
+        var a = [ 1, 2 ].map(function() {
+            return new f();
+        });
+        console.log(a[0].constructor === a[1].constructor);
+    }
+    expect_stdout: "true"
+}
+
+issue_3042_2: {
+    options = {
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function Foo() {
+            this.isFoo = function(o) {
+                return o instanceof Foo;
+            };
+        }
+        function FooCollection() {
+            this.foos = [1, 1].map(function() {
+                return new Foo();
+            });
+        }
+        var fooCollection = new FooCollection();
+        console.log(fooCollection.foos[0].isFoo(fooCollection.foos[0]));
+        console.log(fooCollection.foos[0].isFoo(fooCollection.foos[1]));
+        console.log(fooCollection.foos[1].isFoo(fooCollection.foos[0]));
+        console.log(fooCollection.foos[1].isFoo(fooCollection.foos[1]));
+    }
+    expect: {
+        function Foo() {
+            this.isFoo = function(o) {
+                return o instanceof Foo;
+            };
+        }
+        var fooCollection = new function() {
+            this.foos = [1, 1].map(function() {
+                return new Foo();
+            });
+        }();
+        console.log(fooCollection.foos[0].isFoo(fooCollection.foos[0]));
+        console.log(fooCollection.foos[0].isFoo(fooCollection.foos[1]));
+        console.log(fooCollection.foos[1].isFoo(fooCollection.foos[0]));
+        console.log(fooCollection.foos[1].isFoo(fooCollection.foos[1]));
+    }
+    expect_stdout: [
+        "true",
+        "true",
+        "true",
+        "true",
+    ]
+}
+
+issue_3068_1: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+    }
+    input: {
+        (function() {
+            do {
+                continue;
+                var b = "defined";
+            } while (b && b.c);
+        })();
+    }
+    expect: {
+        (function() {
+            do {
+                continue;
+                var b = "defined";
+            } while (b && b.c);
+        })();
+    }
+    expect_stdout: true
+}
+
+issue_3068_2: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+    }
+    input: {
+        (function() {
+            do {
+                try {
+                    while ("" == typeof a);
+                } finally {
+                    continue;
+                }
+                var b = "defined";
+            } while (b && b.c);
+        })();
+    }
+    expect: {
+        (function() {
+            do {
+                try {
+                    while ("" == typeof a);
+                } finally {
+                    continue;
+                }
+                var b = "defined";
+            } while (b && b.c);
+        })();
+    }
+    expect_stdout: true
+}
+
+issue_3110_1: {
+    options = {
+        conditionals: true,
+        evaluate: true,
+        inline: true,
+        passes: 3,
+        properties: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            function foo() {
+                return isDev ? "foo" : "bar";
+            }
+            var isDev = true;
+            var obj = {
+                foo: foo
+            };
+            console.log(foo());
+            console.log(obj.foo());
+        })();
+    }
+    expect: {
+        console.log("foo"),
+        console.log("foo");
+    }
+    expect_stdout: [
+        "foo",
+        "foo",
+    ]
+}
+
+issue_3110_2: {
+    options = {
+        conditionals: true,
+        evaluate: true,
+        inline: true,
+        passes: 4,
+        properties: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            function foo() {
+                return isDev ? "foo" : "bar";
+            }
+            var isDev = true;
+            console.log(foo());
+            var obj = {
+                foo: foo
+            };
+            console.log(obj.foo());
+        })();
+    }
+    expect: {
+        console.log("foo"),
+        console.log("foo");
+    }
+    expect_stdout: [
+        "foo",
+        "foo",
+    ]
+}
+
+issue_3110_3: {
+    options = {
+        conditionals: true,
+        evaluate: true,
+        inline: true,
+        properties: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            function foo() {
+                return isDev ? "foo" : "bar";
+            }
+            console.log(foo());
+            var isDev = true;
+            var obj = {
+                foo: foo
+            };
+            console.log(obj.foo());
+        })();
+    }
+    expect: {
+        (function() {
+            function foo() {
+                return isDev ? "foo" : "bar";
+            }
+            console.log(foo());
+            var isDev = true;
+            var obj = {
+                foo: foo
+            };
+            console.log(obj.foo());
+        })();
+    }
+    expect_stdout: [
+        "bar",
+        "foo",
+    ]
+}
+
+issue_3113_1: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+    }
+    input: {
+        var c = 0;
+        (function() {
+            function f() {
+                while (g());
+            }
+            var a = f();
+            function g() {
+                a && a[c++];
+            }
+            g(a = 1);
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        (function() {
+            function f() {
+                while (g());
+            }
+            var a = f();
+            function g() {
+                a && a[c++];
+            }
+            g(a = 1);
+        })();
+        console.log(c);
+    }
+    expect_stdout: "1"
+}
+
+issue_3113_2: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+    }
+    input: {
+        var c = 0;
+        (function() {
+            function f() {
+                while (g());
+            }
+            var a = f();
+            function g() {
+                a && a[c++];
+            }
+            a = 1;
+            g();
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        (function() {
+            function f() {
+                while (g());
+            }
+            var a = f();
+            function g() {
+                a && a[c++];
+            }
+            a = 1;
+            g();
+        })();
+        console.log(c);
+    }
+    expect_stdout: "1"
+}
+
+issue_3113_3: {
+    options = {
+        evaluate: true,
+        inline: true,
+        passes: 2,
+        pure_getters: "strict",
+        reduce_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var c = 0;
+        (function() {
+            function f() {
+                while (g());
+            }
+            var a;
+            function g() {
+                a && a[c++];
+            }
+            g(a = 1);
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        c++;
+        console.log(c);
+    }
+    expect_stdout: "1"
+}
+
+issue_3113_4: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        var a = 0, b = 0;
+        function f() {
+            b += a;
+        }
+        f(f(), ++a);
+        console.log(a, b);
+    }
+    expect: {
+        var a = 0, b = 0;
+        function f() {
+            b += a;
+        }
+        f(f(), ++a);
+        console.log(a, b);
+    }
+    expect_stdout: "1 1"
+}
+
+issue_3113_5: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        function f() {
+            console.log(a);
+        }
+        function g() {
+            f();
+        }
+        while (g());
+        var a = 1;
+        f();
+    }
+    expect: {
+        function f() {
+            console.log(a);
+        }
+        function g() {
+            f();
+        }
+        while (g());
+        var a = 1;
+        f();
+    }
+    expect_stdout: [
+        "undefined",
+        "1",
+    ]
+}
+
+conditional_nested_1: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+    }
+    input: {
+        var a = 1, b = 0;
+        (function f(c) {
+            function g() {
+                c && (c.a = 0);
+                c && (c.a = 0);
+                c && (c[b++] *= 0);
+            }
+            g(a-- && f(g(c = 42)));
+        })();
+        console.log(b);
+    }
+    expect: {
+        var a = 1, b = 0;
+        (function f(c) {
+            function g() {
+                c && (c.a = 0);
+                c && (c.a = 0);
+                c && (c[b++] *= 0);
+            }
+            g(a-- && f(g(c = 42)));
+        })();
+        console.log(b);
+    }
+    expect_stdout: "2"
+}
+
+conditional_nested_2: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+    }
+    input: {
+        var c = 0;
+        (function(a) {
+            function f() {
+                a && c++;
+            }
+            f(!c && f(), a = 1);
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        (function(a) {
+            function f() {
+                a && c++;
+            }
+            f(!c && f(), a = 1);
+        })();
+        console.log(c);
+    }
+    expect_stdout: "1"
+}
+
+conditional_nested_3: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+    }
+    input: {
+        var n = 2, c = 0;
+        (function f(a) {
+            0 < n-- && g(a = 1);
+            function g() {
+                a && c++;
+            }
+            g();
+            0 < n-- && f();
+        })();
+        console.log(c);
+    }
+    expect: {
+        var n = 2, c = 0;
+        (function f(a) {
+            0 < n-- && g(a = 1);
+            function g() {
+                a && c++;
+            }
+            g();
+            0 < n-- && f();
+        })();
+        console.log(c);
+    }
+    expect_stdout: "2"
+}
+
+issue_2436: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
+    }
+    input: {
+        var c;
+        console.log(((c = {
+            a: 1,
+            b: 2
+        }).a = 3, {
+            x: c.a,
+            y: c.b
+        }));
+    }
+    expect: {
+        var c;
+        console.log(((c = {
+            a: 1,
+            b: 2
+        }).a = 3, {
+            x: c.a,
+            y: c.b
+        }));
+    }
+    expect_stdout: true
+}
+
+issue_2916: {
+    options = {
+        collapse_vars: true,
+        evaluate: true,
+        inline: true,
+        passes: 2,
+        reduce_vars: true,
+        side_effects: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        var c = "FAIL";
+        (function(b) {
+            (function(d) {
+                d[0] = 1;
+            })(b);
+            +b && (c = "PASS");
+        })([]);
+        console.log(c);
+    }
+    expect: {
+        var c = "FAIL";
+        (function(b) {
+            b[0] = 1;
+            +b && (c = "PASS");
+        })([]);
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3125: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
+    }
+    input: {
+        var o;
+        console.log((function() {
+            this.p++;
+        }.call(o = {
+            p: 6
+        }), o.p));
+    }
+    expect: {
+        var o;
+        console.log((function() {
+            this.p++;
+        }.call(o = {
+            p: 6
+        }), o.p));
+    }
+    expect_stdout: "7"
+}
+
+issue_3140_1: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var a;
+            function f() {
+            }
+            f.g = function g() {
+                function h() {
+                    console.log(a ? "PASS" : "FAIL");
+                }
+                a = true;
+                this();
+                a = false;
+                h.g = g;
+                return h;
+            };
+            return f;
+        })().g().g();
+    }
+    expect: {
+        (function() {
+            var a;
+            function f() {
+            }
+            f.g = function g() {
+                function h() {
+                    console.log(a ? "PASS" : "FAIL");
+                }
+                a = true;
+                this();
+                a = false;
+                h.g = g;
+                return h;
+            };
+            return f;
+        })().g().g();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3140_2: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var a;
+            function f() {
+            }
+            f.g = function g() {
+                var self = this;
+                function h() {
+                    console.log(a ? "PASS" : "FAIL");
+                }
+                a = true;
+                self();
+                a = false;
+                h.g = g;
+                return h;
+            };
+            return f;
+        })().g().g();
+    }
+    expect: {
+        (function() {
+            var a;
+            function f() {
+            }
+            f.g = function g() {
+                function h() {
+                    console.log(a ? "PASS" : "FAIL");
+                }
+                a = true;
+                this();
+                a = false;
+                h.g = g;
+                return h;
+            };
+            return f;
+        })().g().g();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3140_3: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var a;
+            function f() {
+            }
+            f.g = function g() {
+                var self = this;
+                function h() {
+                    console.log(a ? "PASS" : "FAIL");
+                }
+                a = true;
+                (function() {
+                    return self;
+                })()();
+                a = false;
+                h.g = g;
+                return h;
+            };
+            return f;
+        })().g().g();
+    }
+    expect: {
+        (function() {
+            var a;
+            function f() {
+            }
+            f.g = function g() {
+                var self = this;
+                function h() {
+                    console.log(a ? "PASS" : "FAIL");
+                }
+                a = true;
+                (function() {
+                    return self;
+                })()();
+                a = false;
+                h.g = g;
+                return h;
+            };
+            return f;
+        })().g().g();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3140_4: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var a;
+            function f() {
+            }
+            f.g = function g() {
+                var o = {
+                    p: this
+                };
+                function h() {
+                    console.log(a ? "PASS" : "FAIL");
+                }
+                a = true;
+                o.p();
+                a = false;
+                h.g = g;
+                return h;
+            };
+            return f;
+        })().g().g();
+    }
+    expect: {
+        (function() {
+            var a;
+            function f() {
+            }
+            f.g = function g() {
+                var o = {
+                    p: this
+                };
+                function h() {
+                    console.log(a ? "PASS" : "FAIL");
+                }
+                a = true;
+                o.p();
+                a = false;
+                h.g = g;
+                return h;
+            };
+            return f;
+        })().g().g();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3140_5: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+    }
+    input: {
+        var n = 1, c = 0;
+        (function(a) {
+            var b = function() {
+                this;
+                n-- && h();
+            }();
+            function h() {
+                b && c++;
+            }
+            h(b = 1);
+        })();
+        console.log(c);
+    }
+    expect: {
+        var n = 1, c = 0;
+        (function(a) {
+            var b = function() {
+                this;
+                n-- && h();
+            }();
+            function h() {
+                b && c++;
+            }
+            h(b = 1);
+        })();
+        console.log(c);
+    }
+    expect_stdout: "1"
+}

test/compress/regexp.js

@@ -0,0 +1,37 @@
+regexp_simple: {
+    input: {
+        /rx/ig
+    }
+    expect_exact: "/rx/gi;"
+}
+
+regexp_slashes: {
+    input: {
+        /\\\/rx\/\\/ig
+    }
+    expect_exact: "/\\\\\\/rx\\/\\\\/gi;"
+}
+
+regexp_1: {
+    input: {
+        console.log(JSON.stringify("COMPASS? Overpass.".match(/([Sap]+)/ig)));
+    }
+    expect: {
+        console.log(JSON.stringify("COMPASS? Overpass.".match(/([Sap]+)/gi)));
+    }
+    expect_stdout: '["PASS","pass"]'
+}
+
+regexp_2: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log(JSON.stringify("COMPASS? Overpass.".match(new RegExp("([Sap]+)", "ig"))));
+    }
+    expect: {
+        console.log(JSON.stringify("COMPASS? Overpass.".match(/([Sap]+)/gi)));
+    }
+    expect_stdout: '["PASS","pass"]'
+}

test/compress/sequences.js

@@ -876,3 +876,59 @@ forin: {
     }
     expect_stdout: "PASS"
 }
+
+call: {
+    options = {
+        sequences: true,
+    }
+    input: {
+        var a = function() {
+            return this;
+        }();
+        function b() {
+            console.log("foo");
+        }
+        b.c = function() {
+            console.log(this === b ? "bar" : "baz");
+        };
+        (a, b)();
+        (a, b.c)();
+        (a, function() {
+            console.log(this === a);
+        })();
+        new (a, b)();
+        new (a, b.c)();
+        new (a, function() {
+            console.log(this === a);
+        })();
+    }
+    expect: {
+        var a = function() {
+            return this;
+        }();
+        function b() {
+            console.log("foo");
+        }
+        b.c = function() {
+            console.log(this === b ? "bar" : "baz");
+        },
+        a, b(),
+        (a, b.c)(),
+        a, function() {
+            console.log(this === a);
+        }(),
+        a, new b(),
+        a, new b.c(),
+        a, new function() {
+            console.log(this === a);
+        }();
+    }
+    expect_stdout: [
+        "foo",
+        "baz",
+        "true",
+        "foo",
+        "baz",
+        "false",
+    ]
+}

test/compress/string-literal.js

@@ -14,6 +14,13 @@ issue_1929: {
         function f(s) {
             return s.split(/[\\/]/);
         }
+        console.log(JSON.stringify(f("A/B\\C\\D/E\\F")));
     }
-    expect_exact: "function f(s){return s.split(/[\\\\/]/)}"
+    expect: {
+        function f(s) {
+            return s.split(/[\\/]/);
+        }
+        console.log(JSON.stringify(f("A/B\\C\\D/E\\F")));
+    }
+    expect_stdout: '["A","B","C","D","E","F"]'
 }

test/compress/typeof.js

@@ -90,17 +90,11 @@ typeof_defun_1: {
         "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();
-        "function" == typeof h && h();
+        h();
     }
     expect_stdout: [
         "YES",

test/fetch.js

@@ -1,4 +1,5 @@
 var fs = require("fs");
+var parse = require("url").parse;
 var path = require("path");
 
 try {
@@ -19,7 +20,9 @@ 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) {
+        var options = parse(url);
+        options.rejectUnauthorized = false;
+        require(options.protocol.slice(0, -1)).get(options, function(res) {
             if (res.statusCode !== 200) return callback(res);
             res.pipe(fs.createWriteStream(local(url)).on("close", function() {
                 callback(null, read(url));

test/input/enclose/input.js

@@ -0,0 +1,4 @@
+function enclose() {
+    console.log("test enclose");
+}
+enclose();

test/input/issue-505/output.js

@@ -1,5 +1,5 @@
 function test(a){
 "aaaaaaaaaaaaaaaa"
-;a(err,data),a(err,data)
-}
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIjAiXSwibmFtZXMiOlsidGVzdCIsImNhbGxiYWNrIiwiZXJyIiwiZGF0YSJdLCJtYXBwaW5ncyI6IkFBQUEsU0FBU0EsS0FBS0M7QUFDVjtDQUNBQSxFQUFTQyxJQUFLQyxNQUNkRixFQUFTQyxJQUFLQyJ9
+;a(err,data),a(err,
+data)}
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIjAiXSwibmFtZXMiOlsidGVzdCIsImNhbGxiYWNrIiwiZXJyIiwiZGF0YSJdLCJtYXBwaW5ncyI6IkFBQUEsU0FBU0EsS0FBS0M7QUFDVjtDQUNBQSxFQUFTQyxJQUFLQyxNQUNkRixFQUFTQztBQUFLQyJ9

test/input/pr-3040/expect.js

@@ -0,0 +1,2 @@
+function _toConsumableArray(arr){if(Array.isArray(arr)){for(var i=0,arr2=Array(arr.length);i<arr.length;i++){arr2[i]=arr[i]}return arr2}else{return Array.from(arr)}}var _require=require("bar"),foo=_require.foo;var _require2=require("world"),hello=_require2.hello;foo.x.apply(foo,_toConsumableArray(foo.y(hello.z)));
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbImlucHV0Mi5qcyJdLCJuYW1lcyI6WyJyZXF1aXJlIiwiYXJyIl0sIm1hcHBpbmdzIjoiMEpBQWNBLEtBQVFDIiwic291cmNlc0NvbnRlbnQiOlsiY29uc3Qge2Zvb30gPSByZXF1aXJlKFwiYmFyXCIpO1xuY29uc3Qge2hlbGxvfSA9IHJlcXVpcmUoXCJ3b3JsZFwiKTtcblxuZm9vLngoLi4uZm9vLnkoaGVsbG8ueikpO1xuIl19

test/input/pr-3040/input.js

@@ -0,0 +1,11 @@
+function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
+
+var _require = require("bar"),
+    foo = _require.foo;
+
+var _require2 = require("world"),
+    hello = _require2.hello;
+
+foo.x.apply(foo, _toConsumableArray(foo.y(hello.z)));
+
+//# sourceMappingURL=input.js.map

test/input/pr-3040/input.js.map

@@ -0,0 +1 @@
+{"version":3,"sources":["input2.js"],"names":["require","foo","hello","x","apply","_toConsumableArray","y","z"],"mappings":"kLAAcA,QAAQ,OAAfC,aAAAA,kBACSD,QAAQ,SAAjBE,gBAAAA,MAEPD,IAAIE,EAAJC,MAAAH,IAAAI,mBAASJ,IAAIK,EAAEJ,MAAMK","sourcesContent":["const {foo} = require(\"bar\");\nconst {hello} = require(\"world\");\n\nfoo.x(...foo.y(hello.z));\n"]}

test/jetstream.js

@@ -3,7 +3,7 @@
 
 "use strict";
 
-var site = "http://browserbench.org/JetStream";
+var site = "https://browserbench.org/JetStream";
 if (typeof phantom == "undefined") {
     require("../tools/exit");
     var args = process.argv.slice(2);

test/mocha.js

@@ -1,24 +1,114 @@
 var fs = require("fs");
-var Mocha = require("mocha");
-var path = require("path");
 
-// Instantiate a Mocha instance
-var mocha = new Mocha({
-    timeout: 5000
-});
-var testDir = __dirname + "/mocha/";
+var config = {
+    limit: 5000,
+    timeout: function(limit) {
+        this.limit = limit;
+    }
+};
+var tasks = [];
+var titles = [];
+describe = function(title, fn) {
+    config = Object.create(config);
+    titles.push(title);
+    fn.call(config);
+    titles.pop();
+    config = Object.getPrototypeOf(config);
+};
+it = function(title, fn) {
+    fn.limit = config.limit;
+    fn.titles = titles.slice();
+    fn.titles.push(title);
+    tasks.push(fn);
+};
 
-// Add each .js file to the Mocha instance
-fs.readdirSync(testDir).filter(function(file) {
+fs.readdirSync("test/mocha").filter(function(file) {
     return /\.js$/.test(file);
 }).forEach(function(file) {
-    mocha.addFile(path.join(testDir, file));
+    require("./mocha/" + file);
 });
 
-module.exports = function() {
-    mocha.run(function(failures) {
-        if (failures) process.on("exit", function() {
-            process.exit(failures);
-        });
-    });
+function log_titles(log, current, marker) {
+    var indent = "";
+    var writing = false;
+    for (var i = 0; i < current.length; i++, indent += "  ") {
+        if (titles[i] != current[i]) writing = true;
+        if (writing) log(indent + (i == current.length - 1 && marker || "") + current[i]);
+    }
+    titles = current;
+}
+
+function red(text) {
+    return "\u001B[31m" + text + "\u001B[39m";
+}
+
+function green(text) {
+    return "\u001B[32m" + text + "\u001B[39m";
+}
+
+var errors = [];
+var total = tasks.length;
+titles = [];
+process.nextTick(function run() {
+    var task = tasks.shift();
+    if (task) try {
+        var elapsed = Date.now();
+        var timer;
+        var done = function() {
+            reset();
+            elapsed = Date.now() - elapsed;
+            if (elapsed > task.limit) {
+                throw new Error("Timed out: " + elapsed + "ms > " + task.limit + "ms");
+            }
+            log_titles(console.log, task.titles, green('\u221A '));
+            process.nextTick(run);
         };
+        if (task.length) {
+            task.timeout = function(limit) {
+                clearTimeout(timer);
+                task.limit = limit;
+                timer = setTimeout(function() {
+                    raise(new Error("Timed out: exceeds " + limit + "ms"));
+                }, limit);
+            };
+            task.timeout(task.limit);
+            process.on("uncaughtException", raise);
+            task.call(task, done);
+        } else {
+            task.timeout = config.timeout;
+            task.call(task);
+            done();
+        }
+    } catch (err) {
+        raise(err);
+    } else if (errors.length) {
+        console.error();
+        console.log(red(errors.length + " test(s) failed!"));
+        titles = [];
+        errors.forEach(function(titles, index) {
+            console.error();
+            log_titles(console.error, titles, (index + 1) + ") ");
+            var lines = titles.error.stack.split('\n');
+            console.error(red(lines[0]));
+            console.error(lines.slice(1).join("\n"));
+        });
+        process.exit(1);
+    } else {
+        console.log();
+        console.log(green(total + " test(s) passed."));
+    }
+
+    function raise(err) {
+        reset();
+        task.titles.error = err;
+        errors.push(task.titles);
+        log_titles(console.log, task.titles, red('\u00D7 '));
+        process.nextTick(run);
+    }
+
+    function reset() {
+        clearTimeout(timer);
+        done = function() {};
+        process.removeListener("uncaughtException", raise);
+    }
+});

test/mocha/cli.js

@@ -1,78 +1,77 @@
 var assert = require("assert");
 var exec = require("child_process").exec;
-var readFileSync = require("fs").readFileSync;
+var fs = require("fs");
 
 function read(path) {
-    return readFileSync(path, "utf8");
+    return fs.readFileSync(path, "utf8");
 }
 
 describe("bin/uglifyjs", function() {
     var uglifyjscmd = '"' + process.argv[0] + '" bin/uglifyjs';
     it("should produce a functional build when using --self", function(done) {
         this.timeout(30000);
-
         var command = uglifyjscmd + ' --self -cm --wrap WrappedUglifyJS';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             eval(stdout);
-
-            assert.strictEqual(typeof WrappedUglifyJS, 'object');
+            assert.strictEqual(typeof WrappedUglifyJS, "object");
             var result = WrappedUglifyJS.minify("foo([true,,2+3]);");
             assert.strictEqual(result.error, undefined);
             assert.strictEqual(result.code, "foo([!0,,5]);");
-
             done();
         });
     });
     it("Should be able to filter comments correctly with `--comments all`", function(done) {
         var command = uglifyjscmd + ' test/input/comments/filter.js --comments all';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, "// foo\n/*@preserve*/\n// bar\n\n");
             done();
         });
     });
     it("Should be able to filter comments correctly with `--comment <RegExp>`", function(done) {
         var command = uglifyjscmd + ' test/input/comments/filter.js --comments /r/';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, "/*@preserve*/\n// bar\n\n");
             done();
         });
     });
     it("Should be able to filter comments correctly with just `--comment`", function(done) {
         var command = uglifyjscmd + ' test/input/comments/filter.js --comments';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, "/*@preserve*/\n\n");
             done();
         });
     });
+    it("Should give sensible error against invalid input source map", function(done) {
+        var command = uglifyjscmd + " test/mocha.js --source-map content=blah,url=inline";
+        exec(command, function(err, stdout, stderr) {
+            assert.ok(err);
+            assert.deepEqual(stderr.split(/\n/).slice(0, 2), [
+                "INFO: Using input source map: blah",
+                "ERROR: invalid input source map: blah",
+            ]);
+            done();
+        });
+    });
     it("Should append source map to output when using --source-map url=inline", function(done) {
         var command = uglifyjscmd + " test/input/issue-1323/sample.js --source-map url=inline";
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
-            assert.strictEqual(stdout, "var bar=function(){function foo(bar){return bar}return foo}();\n" +
-                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMTMyMy9zYW1wbGUuanMiXSwibmFtZXMiOlsiYmFyIiwiZm9vIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFJQSxJQUFNLFdBQ04sU0FBU0MsSUFBS0QsS0FDVixPQUFPQSxJQUdYLE9BQU9DLElBTEQifQ==\n");
+            assert.strictEqual(stdout, [
+                "var bar=function(){function foo(bar){return bar}return foo}();",
+                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMTMyMy9zYW1wbGUuanMiXSwibmFtZXMiOlsiYmFyIiwiZm9vIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFJQSxJQUFNLFdBQ04sU0FBU0MsSUFBS0QsS0FDVixPQUFPQSxJQUdYLE9BQU9DLElBTEQifQ==",
+                "",
+            ].join("\n"));
             done();
         });
     });
     it("should not append source map to output when not using --source-map url=inline", function(done) {
         var command = uglifyjscmd + ' test/input/issue-1323/sample.js';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, "var bar=function(){function foo(bar){return bar}return foo}();\n");
             done();
         });
@@ -84,133 +83,158 @@ describe("bin/uglifyjs", function () {
             "--source-map", "content=test/input/issue-2082/sample.js.map",
             "--source-map", "url=inline",
         ].join(" ");
-
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
-
-            var stderrLines = stderr.split('\n');
-            assert.strictEqual(stderrLines[0], 'INFO: Using input source map: test/input/issue-2082/sample.js.map');
+            var stderrLines = stderr.split("\n");
+            assert.strictEqual(stderrLines[0], "INFO: Using input source map: test/input/issue-2082/sample.js.map");
             assert.notStrictEqual(stderrLines[1], 'INFO: Using input source map: {"version": 3,"sources": ["index.js"],"mappings": ";"}');
             done();
         });
     });
-    it("Should work with --keep-fnames (mangle only)", function (done) {
-        var command = uglifyjscmd + ' test/input/issue-1431/sample.js --keep-fnames -m';
+    it("Should not load source map before finish reading from STDIN", function(done) {
+        var mapFile = "tmp/input.js.map";
+        try {
+            fs.mkdirSync("./tmp");
+        } catch (e) {
+            if (e.code != "EEXIST") throw e;
+        }
+        try {
+            fs.unlinkSync(mapFile);
+        } catch (e) {
+            if (e.code != "ENOENT") throw e;
+        }
+        var command = [
+            uglifyjscmd,
+            "--source-map", "content=" + mapFile,
+            "--source-map", "includeSources=true",
+            "--source-map", "url=inline",
+        ].join(" ");
 
-        exec(command, function (err, stdout) {
+        var child = exec(command, function(err, stdout) {
             if (err) throw err;
 
+            assert.strictEqual(stdout, read("test/input/pr-3040/expect.js"));
+            done();
+        });
+        setTimeout(function() {
+            fs.writeFileSync(mapFile, read("test/input/pr-3040/input.js.map"));
+            child.stdin.end(read("test/input/pr-3040/input.js"));
+        }, 1000);
+    });
+    it("Should work with --keep-fnames (mangle only)", function(done) {
+        var command = uglifyjscmd + ' test/input/issue-1431/sample.js --keep-fnames -m';
+        exec(command, function(err, stdout) {
+            if (err) throw err;
             assert.strictEqual(stdout, "function f(r){return function(){function n(n){return n*n}return r(n)}}function g(n){return n(1)+n(2)}console.log(f(g)()==5);\n");
             done();
         });
     });
     it("Should work with --keep-fnames (mangle & compress)", function(done) {
         var command = uglifyjscmd + ' test/input/issue-1431/sample.js --keep-fnames -m -c unused=false';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, "function f(r){return function(){function n(n){return n*n}return r(n)}}function g(n){return n(1)+n(2)}console.log(5==f(g)());\n");
             done();
         });
     });
     it("Should work with keep_fnames under mangler options", function(done) {
         var command = uglifyjscmd + ' test/input/issue-1431/sample.js -m keep_fnames=true';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, "function f(r){return function(){function n(n){return n*n}return r(n)}}function g(n){return n(1)+n(2)}console.log(f(g)()==5);\n");
             done();
         });
     });
     it("Should work with --define (simple)", function(done) {
         var command = uglifyjscmd + ' test/input/global_defs/simple.js --define D=5 -c';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, "console.log(5);\n");
             done();
         });
     });
     it("Should work with --define (nested)", function(done) {
         var command = uglifyjscmd + ' test/input/global_defs/nested.js --define C.D=5,C.V=3 -c';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, "console.log(3,5);\n");
             done();
         });
     });
     it("Should work with --define (AST_Node)", function(done) {
         var command = uglifyjscmd + ' test/input/global_defs/simple.js --define console.log=stdout.println -c';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, "stdout.println(D);\n");
             done();
         });
     });
     it("Should work with `--beautify`", function(done) {
         var command = uglifyjscmd + ' test/input/issue-1482/input.js -b';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, read("test/input/issue-1482/default.js"));
             done();
         });
     });
     it("Should work with `--beautify braces`", function(done) {
         var command = uglifyjscmd + ' test/input/issue-1482/input.js -b braces';
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, read("test/input/issue-1482/braces.js"));
             done();
         });
     });
     it("Should process inline source map", function(done) {
-        var command = uglifyjscmd + " test/input/issue-520/input.js -mc toplevel --source-map content=inline,url=inline";
-
+        var command = [
+            uglifyjscmd,
+            "test/input/issue-520/input.js",
+            "-mc", "toplevel",
+            "--source-map", "content=inline",
+            "--source-map", "includeSources=true",
+            "--source-map", "url=inline",
+        ].join(" ");
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, read("test/input/issue-520/output.js"));
             done();
         });
     });
     it("Should warn for missing inline source map", function(done) {
         var command = uglifyjscmd + " test/input/issue-1323/sample.js --source-map content=inline,url=inline";
-
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
-
             assert.strictEqual(stdout, [
                 "var bar=function(){function foo(bar){return bar}return foo}();",
                 "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMTMyMy9zYW1wbGUuanMiXSwibmFtZXMiOlsiYmFyIiwiZm9vIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFJQSxJQUFNLFdBQ04sU0FBU0MsSUFBS0QsS0FDVixPQUFPQSxJQUdYLE9BQU9DLElBTEQifQ==",
                 "",
             ].join("\n"));
-            assert.strictEqual(stderr, "WARN: inline source map not found\n");
+            var stderrLines = stderr.split("\n");
+            assert.strictEqual(stderrLines[0], "WARN: inline source map not found: test/input/issue-1323/sample.js");
             done();
         });
     });
-    it("Should fail with multiple input and inline source map", function(done) {
-        var command = uglifyjscmd + " test/input/issue-520/input.js test/input/issue-520/output.js --source-map content=inline,url=inline";
-
+    it("Should handle multiple input and inline source map", function(done) {
+        var command = [
+            uglifyjscmd,
+            "test/input/issue-520/input.js",
+            "test/input/issue-1323/sample.js",
+            "--source-map", "content=inline,url=inline",
+        ].join(" ");
         exec(command, function(err, stdout, stderr) {
-            assert.ok(err);
-            assert.strictEqual(stderr.split(/\n/)[0], "ERROR: inline source map only works with singular input");
+            if (err) throw err;
+            assert.strictEqual(stdout, [
+                "var Foo=function Foo(){console.log(1+2)};new Foo;var bar=function(){function foo(bar){return bar}return foo}();",
+                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInN0ZGluIiwidGVzdC9pbnB1dC9pc3N1ZS0xMzIzL3NhbXBsZS5qcyJdLCJuYW1lcyI6WyJGb28iLCJjb25zb2xlIiwibG9nIiwiYmFyIiwiZm9vIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFNQSxJQUFJLFNBQUFBLE1BQWdCQyxRQUFRQyxJQUFJLEVBQUUsSUFBTyxJQUFJRixJQ0FuRCxJQUFJRyxJQUFNLFdBQ04sU0FBU0MsSUFBS0QsS0FDVixPQUFPQSxJQUdYLE9BQU9DLElBTEQifQ==",
+                "",
+            ].join("\n"));
+            var stderrLines = stderr.split("\n");
+            assert.strictEqual(stderrLines[0], "WARN: inline source map not found: test/input/issue-1323/sample.js");
             done();
         });
     });
     it("Should fail with acorn and inline source map", function(done) {
         var command = uglifyjscmd + " test/input/issue-520/input.js --source-map content=inline,url=inline -p acorn";
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stderr, "ERROR: inline source map only works with built-in parser\n");
@@ -219,7 +243,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should fail with SpiderMonkey and inline source map", function(done) {
         var command = uglifyjscmd + " test/input/issue-520/input.js --source-map content=inline,url=inline -p spidermonkey";
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stderr, "ERROR: inline source map only works with built-in parser\n");
@@ -228,7 +251,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should fail with invalid syntax", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/simple.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             var lines = stderr.split(/\n/);
@@ -241,7 +263,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should fail with correct marking of tabs", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/tab.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             var lines = stderr.split(/\n/);
@@ -254,7 +275,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should fail with correct marking at start of line", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/eof.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             var lines = stderr.split(/\n/);
@@ -267,7 +287,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should fail with a missing loop body", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/loop-no-body.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             var lines = stderr.split(/\n/);
@@ -280,7 +299,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (5--)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/assign_1.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -295,7 +313,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (Math.random() /= 2)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/assign_2.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -310,7 +327,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (++this)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/assign_3.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -325,7 +341,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (++null)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/assign_4.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -340,7 +355,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (a.=)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/dot_1.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -355,7 +369,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (%.a)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/dot_2.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -370,7 +383,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (a./();)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/dot_3.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -385,7 +397,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error ({%: 1})", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/object.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -400,7 +411,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (delete x)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/delete.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -415,7 +425,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (function g(arguments))", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/function_1.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -430,7 +439,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (function eval())", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/function_2.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -445,7 +453,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (iife arguments())", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/function_3.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -460,7 +467,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (catch(eval))", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/try.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -475,7 +481,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (var eval)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/var.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -490,7 +495,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (else)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/else.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -505,7 +509,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (return)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/return.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -520,7 +523,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (for-in init)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/for-in_1.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -535,7 +537,6 @@ describe("bin/uglifyjs", function () {
     });
     it("Should throw syntax error (for-in var)", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/for-in_2.js';
-
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
@@ -555,10 +556,8 @@ describe("bin/uglifyjs", function () {
             "--source-map",
             'content="' + read_map() + '",url=inline'
         ].join(" ");
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, [
                 '"use strict";var foo=function foo(x){return"foo "+x};console.log(foo("bar"));',
                 "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbImluZGV4LmpzIl0sIm5hbWVzIjpbImZvbyIsIngiLCJjb25zb2xlIiwibG9nIl0sIm1hcHBpbmdzIjoiYUFBQSxJQUFJQSxJQUFNLFNBQU5BLElBQU1DLEdBQUEsTUFBSyxPQUFTQSxHQUN4QkMsUUFBUUMsSUFBSUgsSUFBSSJ9",
@@ -580,10 +579,8 @@ describe("bin/uglifyjs", function () {
             "-c",
             "--source-map", "url=inline",
         ].join(" ");
-
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
-
             assert.strictEqual(stdout, [
                 'function foo(){return function(){console.log("PASS")}}foo()();',
                 "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMjMxMC9pbnB1dC5qcyJdLCJuYW1lcyI6WyJmb28iLCJjb25zb2xlIiwibG9nIiwiZiJdLCJtYXBwaW5ncyI6IkFBQUEsU0FBU0EsTUFDTCxPQUFPLFdBQ0hDLFFBQVFDLElBQUksU0FLUkYsS0FDUkcifQ==",
@@ -596,7 +593,6 @@ describe("bin/uglifyjs", function () {
         var command = uglifyjscmd + " test/input/global_defs/simple.js -mco ast";
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             var ast = JSON.parse(stdout);
             assert.strictEqual(ast._class, "AST_Toplevel");
             assert.ok(Array.isArray(ast.body));
@@ -614,20 +610,16 @@ describe("bin/uglifyjs", function () {
     });
     it("Should work with --mangle reserved=[]", function(done) {
         var command = uglifyjscmd + " test/input/issue-505/input.js -m reserved=[callback]";
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, 'function test(callback){"aaaaaaaaaaaaaaaa";callback(err,data);callback(err,data)}\n');
             done();
         });
     });
     it("Should work with --mangle reserved=false", function(done) {
         var command = uglifyjscmd + " test/input/issue-505/input.js -m reserved=false";
-
         exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, 'function test(a){"aaaaaaaaaaaaaaaa";a(err,data);a(err,data)}\n');
             done();
         });
@@ -682,4 +674,36 @@ describe("bin/uglifyjs", function () {
             done();
         });
     });
+    it("Should work with --enclose", function(done) {
+        var command = uglifyjscmd + " test/input/enclose/input.js --enclose";
+        exec(command, function(err, stdout, stderr) {
+            if (err) throw err;
+            assert.strictEqual(stdout, '(function(){function enclose(){console.log("test enclose")}enclose()})();\n');
+            done();
+        });
+    });
+    it("Should work with --enclose arg", function(done) {
+        var command = uglifyjscmd + " test/input/enclose/input.js --enclose undefined";
+        exec(command, function(err, stdout, stderr) {
+            if (err) throw err;
+            assert.strictEqual(stdout, '(function(undefined){function enclose(){console.log("test enclose")}enclose()})();\n');
+            done();
+        });
+    });
+    it("Should work with --enclose arg:value", function(done) {
+        var command = uglifyjscmd + " test/input/enclose/input.js --enclose window,undefined:window";
+        exec(command, function(err, stdout, stderr) {
+            if (err) throw err;
+            assert.strictEqual(stdout, '(function(window,undefined){function enclose(){console.log("test enclose")}enclose()})(window);\n');
+            done();
+        });
+    });
+    it("Should work with --enclose & --wrap", function(done) {
+        var command = uglifyjscmd + " test/input/enclose/input.js --enclose window,undefined:window --wrap exports";
+        exec(command, function(err, stdout, stderr) {
+            if (err) throw err;
+            assert.strictEqual(stdout, '(function(window,undefined){(function(exports){function enclose(){console.log("test enclose")}enclose()})(typeof exports=="undefined"?exports={}:exports)})(window);\n');
+            done();
+        });
+    });
 });

test/mocha/getter-setter.js

@@ -61,29 +61,24 @@ describe("Getters and setters", function() {
 
             return results;
         };
-
         var testCase = function(data) {
             return function() {
                 UglifyJS.parse(data.code);
             };
         };
-
         var fail = function(data) {
             return function(e) {
-                return e instanceof UglifyJS.JS_Parse_Error &&
-                    e.message === "Unexpected token: operator (" + data.operator + ")";
+                return e instanceof UglifyJS.JS_Parse_Error
+                    && e.message === "Unexpected token: operator (" + data.operator + ")";
             };
         };
-
         var errorMessage = function(data) {
             return "Expected but didn't get a syntax error while parsing following line:\n" + data.code;
         };
-
         var tests = generator();
         for (var i = 0; i < tests.length; i++) {
             var test = tests[i];
             assert.throws(testCase(test), fail(test), errorMessage(test));
         }
     });
-
 });

test/mocha/ie8.js

@@ -0,0 +1,21 @@
+var assert = require("assert");
+var uglify = require("../../");
+
+describe("ie8", function() {
+    it("Should be able to minify() with undefined as catch parameter in a try...catch statement", function() {
+        assert.strictEqual(
+            uglify.minify([
+                "function a(b){",
+                "    try {",
+                "        throw 'Stuff';",
+                "    } catch (undefined) {",
+                "        console.log('caught: ' + undefined);",
+                "    }",
+                "    console.log('undefined is ' + undefined);",
+                "    return b === undefined;",
+                "};",
+            ].join("\n")).code,
+            'function a(o){try{throw"Stuff"}catch(o){console.log("caught: "+o)}return console.log("undefined is "+void 0),void 0===o}'
+        );
+    });
+});

test/mocha/input-sourcemaps.js

@@ -1,10 +1,7 @@
-var Uglify = require('../../');
 var assert = require("assert");
+var Uglify = require("../../");
 var SourceMapConsumer = require("source-map").SourceMapConsumer;
 
-describe("input sourcemaps", function() {
-    var transpilemap, map;
-
 function getMap() {
     return {
         "version": 3,
@@ -17,50 +14,55 @@ describe("input sourcemaps", function() {
 }
 
 function prepareMap(sourceMap) {
-        var transpiled = '"use strict";\n\n' +
-            'var foo = function foo(x) {\n  return "foo " + x;\n};\n' +
-            'console.log(foo("bar"));\n\n' +
-            '//# sourceMappingURL=bundle.js.map';
-
-        transpilemap = sourceMap || getMap();
-
-        var result = Uglify.minify(transpiled, {
+    var code = [
+        '"use strict";',
+        "",
+        "var foo = function foo(x) {",
+        '  return "foo " + x;',
+        "};",
+        'console.log(foo("bar"));',
+        "",
+        "//# sourceMappingURL=bundle.js.map",
+    ].join("\n");
+    var result = Uglify.minify(code, {
         sourceMap: {
-                content: transpilemap
+            content: sourceMap,
+            includeSources: true,
         }
     });
-
-        map = new SourceMapConsumer(result.map);
+    if (result.error) throw result.error;
+    return new SourceMapConsumer(result.map);
 }
 
-    beforeEach(function () {
-      prepareMap();
-    });
-
+describe("input sourcemaps", function() {
     it("Should copy over original sourcesContent", function() {
-        assert.equal(map.sourceContentFor("index.js"), transpilemap.sourcesContent[0]);
+        var orig = getMap();
+        var map = prepareMap(orig);
+        assert.equal(map.sourceContentFor("index.js"), orig.sourcesContent[0]);
     });
 
     it("Should copy sourcesContent if sources are relative", function() {
         var relativeMap = getMap();
         relativeMap.sources = ['./index.js'];
-
-        prepareMap(relativeMap);
+        var map = prepareMap(relativeMap);
         assert.notEqual(map.sourcesContent, null);
         assert.equal(map.sourcesContent.length, 1);
-        assert.equal(map.sourceContentFor("index.js"), transpilemap.sourcesContent[0]);
+        assert.equal(map.sourceContentFor("index.js"), relativeMap.sourcesContent[0]);
     });
 
-    it("Final sourcemap should not have invalid mappings from inputSourceMap (issue #882)", function() {
+    it("Should not have invalid mappings from inputSourceMap (issue #882)", function() {
+        var map = prepareMap(getMap());
         // The original source has only 2 lines, check that mappings don't have more lines
-
         var msg = "Mapping should not have higher line number than the original file had";
         map.eachMapping(function(mapping) {
-            assert.ok(mapping.originalLine <= 2, msg)
+            assert.ok(mapping.originalLine <= 2, msg);
         });
-
-        map.allGeneratedPositionsFor({source: "index.js", line: 1, column: 1}).forEach(function(pos) {
+        map.allGeneratedPositionsFor({
+            source: "index.js",
+            line: 1,
+            column: 1
+        }).forEach(function(pos) {
             assert.ok(pos.line <= 2, msg);
-        })
+        });
     });
 });

test/mocha/minify.js

@@ -186,99 +186,6 @@ describe("minify", function() {
         });
     });
 
-    describe("inSourceMap", function() {
-        it("Should read the given string filename correctly when sourceMapIncludeSources is enabled (#1236)", function() {
-            var result = Uglify.minify(read("./test/input/issue-1236/simple.js"), {
-                sourceMap: {
-                    content: read("./test/input/issue-1236/simple.js.map"),
-                    filename: "simple.min.js",
-                    includeSources: true
-                }
-            });
-
-            var map = JSON.parse(result.map);
-
-            assert.equal(map.file, 'simple.min.js');
-            assert.equal(map.sourcesContent.length, 1);
-            assert.equal(map.sourcesContent[0],
-                'let foo = x => "foo " + x;\nconsole.log(foo("bar"));');
-        });
-        it("Should process inline source map", function() {
-            var code = Uglify.minify(read("./test/input/issue-520/input.js"), {
-                compress: { toplevel: true },
-                sourceMap: {
-                    content: "inline",
-                    url: "inline"
-                }
-            }).code + "\n";
-            assert.strictEqual(code, readFileSync("test/input/issue-520/output.js", "utf8"));
-        });
-        it("Should warn for missing inline source map", function() {
-            var warn_function = Uglify.AST_Node.warn_function;
-            var warnings = [];
-            Uglify.AST_Node.warn_function = function(txt) {
-                warnings.push(txt);
-            };
-            try {
-                var result = Uglify.minify(read("./test/input/issue-1323/sample.js"), {
-                    mangle: false,
-                    sourceMap: {
-                        content: "inline"
-                    }
-                });
-                assert.strictEqual(result.code, "var bar=function(bar){return bar};");
-                assert.strictEqual(warnings.length, 1);
-                assert.strictEqual(warnings[0], "inline source map not found");
-            } finally {
-                Uglify.AST_Node.warn_function = warn_function;
-            }
-        });
-        it("Should fail with multiple input and inline source map", function() {
-            var result = Uglify.minify([
-                read("./test/input/issue-520/input.js"),
-                read("./test/input/issue-520/output.js")
-            ], {
-                sourceMap: {
-                    content: "inline",
-                    url: "inline"
-                }
-            });
-            var err = result.error;
-            assert.ok(err instanceof Error);
-            assert.strictEqual(err.stack.split(/\n/)[0], "Error: inline source map only works with singular input");
-        });
-    });
-
-    describe("sourceMapInline", function() {
-        it("should append source map to output js when sourceMapInline is enabled", function() {
-            var result = Uglify.minify('var a = function(foo) { return foo; };', {
-                sourceMap: {
-                    url: "inline"
-                }
-            });
-            var code = result.code;
-            assert.strictEqual(code, "var a=function(n){return n};\n" +
-                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIjAiXSwibmFtZXMiOlsiYSIsImZvbyJdLCJtYXBwaW5ncyI6IkFBQUEsSUFBSUEsRUFBSSxTQUFTQyxHQUFPLE9BQU9BIn0=");
-        });
-        it("should not append source map to output js when sourceMapInline is not enabled", function() {
-            var result = Uglify.minify('var a = function(foo) { return foo; };');
-            var code = result.code;
-            assert.strictEqual(code, "var a=function(n){return n};");
-        });
-        it("should work with max_line_len", function() {
-            var result = Uglify.minify(read("./test/input/issue-505/input.js"), {
-                output: {
-                    max_line_len: 20
-                },
-                sourceMap: {
-                    url: "inline"
-                }
-            });
-            assert.strictEqual(result.error, undefined);
-            assert.strictEqual(result.code, read("./test/input/issue-505/output.js"));
-        });
-    });
-
     describe("#__PURE__", function() {
         it("should drop #__PURE__ hint after use", function() {
             var result = Uglify.minify('//@__PURE__ comment1 #__PURE__ comment2\n foo(), bar();', {
@@ -312,6 +219,15 @@ describe("minify", function() {
             assert.strictEqual(err.line, 1);
             assert.strictEqual(err.col, 12);
         });
+        it("should reject duplicated label name", function() {
+            var result = Uglify.minify("L:{L:{}}");
+            var err = result.error;
+            assert.ok(err instanceof Error);
+            assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Label L defined twice");
+            assert.strictEqual(err.filename, "0");
+            assert.strictEqual(err.line, 1);
+            assert.strictEqual(err.col, 4);
+        });
     });
 
     describe("global_defs", function() {
@@ -387,4 +303,45 @@ describe("minify", function() {
             }
         });
     });
+
+    describe("enclose", function() {
+        var code = read("test/input/enclose/input.js");
+        it("Should work with true", function() {
+            var result = Uglify.minify(code, {
+                compress: false,
+                enclose: true,
+                mangle: false,
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code, '(function(){function enclose(){console.log("test enclose")}enclose()})();');
+        });
+        it("Should work with arg", function() {
+            var result = Uglify.minify(code, {
+                compress: false,
+                enclose: 'undefined',
+                mangle: false,
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code, '(function(undefined){function enclose(){console.log("test enclose")}enclose()})();');
+        });
+        it("Should work with arg:value", function() {
+            var result = Uglify.minify(code, {
+                compress: false,
+                enclose: 'window,undefined:window',
+                mangle: false,
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code, '(function(window,undefined){function enclose(){console.log("test enclose")}enclose()})(window);');
+        });
+        it("Should work alongside wrap", function() {
+            var result = Uglify.minify(code, {
+                compress: false,
+                enclose: 'window,undefined:window',
+                mangle: false,
+                wrap: 'exports',
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code, '(function(window,undefined){(function(exports){function enclose(){console.log("test enclose")}enclose()})(typeof exports=="undefined"?exports={}:exports)})(window);');
+        });
+    });
 });

test/mocha/number-literal.js

@@ -7,16 +7,15 @@ describe("Number literals", function () {
             '"use strict";00;',
             '"use strict"; var foo = 00;'
         ];
-
         var test = function(input) {
             return function() {
                 uglify.parse(input);
             }
-        }
+        };
         var error = function(e) {
-            return e instanceof uglify.JS_Parse_Error &&
-                e.message === "Legacy octal literals are not allowed in strict mode";
-        }
+            return e instanceof uglify.JS_Parse_Error
+                && e.message === "Legacy octal literals are not allowed in strict mode";
+        };
         for (var i = 0; i < inputs.length; i++) {
             assert.throws(test(inputs[i]), error, inputs[i]);
         }

test/mocha/parentheses.js

@@ -1,7 +1,7 @@
 var assert = require("assert");
 var uglify = require("../../");
 
-describe("New", function() {
+describe("parentheses", function() {
     it("Should add trailing parentheses for new expressions with zero arguments in beautify mode", function() {
         var tests = [
             "new x(1);",
@@ -83,4 +83,23 @@ describe("New", function() {
             );
         }
     });
+
+    it("Should compress leading parenthesis with reasonable performance", function() {
+        this.timeout(30000);
+        var code = [
+            "({}?0:1)&&x();",
+            "(function(){}).name;",
+        ];
+        for (var i = 16; --i >= 0;) {
+            code = code.concat(code);
+        }
+        code = code.join("");
+        var result = uglify.minify(code, {
+            compress: false,
+            mangle: false,
+        });
+        if (result.error) throw result.error;
+        // Dismal performance for `assert.strictEqual()` in Node.js 6
+        assert.ok(result.code === code);
+    });
 });

test/mocha/screw-ie8.js

@@ -1,21 +0,0 @@
-var assert = require("assert");
-var uglify = require("../../");
-
-describe("screw-ie8", function () {
-    it("Should be able to minify() with undefined as catch parameter in a try...catch statement", function () {
-        assert.strictEqual(
-            uglify.minify(
-                "function a(b){\
-                    try {\
-                        throw 'Stuff';\
-                    } catch (undefined) {\
-                        console.log('caught: ' + undefined);\
-                    }\
-                    console.log('undefined is ' + undefined);\
-                    return b === undefined;\
-                };"
-            ).code,
-            'function a(o){try{throw"Stuff"}catch(o){console.log("caught: "+o)}return console.log("undefined is "+void 0),void 0===o}'
-        );
-    });
-});

test/mocha/sourcemaps.js

@@ -0,0 +1,224 @@
+var assert = require("assert");
+var readFileSync = require("fs").readFileSync;
+var Uglify = require("../../");
+
+function read(path) {
+    return readFileSync(path, "utf8");
+}
+
+function source_map(code) {
+    return JSON.parse(Uglify.minify(code, {
+        compress: false,
+        mangle: false,
+        sourceMap: true,
+    }).map);
+}
+
+describe("sourcemaps", function() {
+    it("Should give correct version", function() {
+        var map = source_map("var x = 1 + 1;");
+        assert.strictEqual(map.version, 3);
+        assert.deepEqual(map.names, [ "x" ]);
+    });
+
+    it("Should give correct names", function() {
+        var map = source_map([
+            "({",
+            "    get enabled() {",
+            "        return 3;",
+            "    },",
+            "    set enabled(x) {",
+            "        ;",
+            "    }",
+            "});",
+        ].join("\n"));
+        assert.deepEqual(map.names, [ "enabled", "x" ]);
+    });
+
+    it("Should mark array/object literals", function() {
+        var result = Uglify.minify([
+            "var obj = {};",
+            "obj.wat([]);",
+        ].join("\n"), {
+            sourceMap: true,
+            toplevel: true,
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, "({}).wat([]);");
+        assert.strictEqual(result.map, '{"version":3,"sources":["0"],"names":["wat"],"mappings":"CAAU,IACNA,IAAI"}');
+    });
+
+    it("Should give correct sourceRoot", function() {
+        var code = "console.log(42);";
+        var result = Uglify.minify(code, {
+            sourceMap: {
+                root: "//foo.bar/",
+            },
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, code);
+        assert.strictEqual(result.map, '{"version":3,"sources":["0"],"names":["console","log"],"mappings":"AAAAA,QAAQC,IAAI","sourceRoot":"//foo.bar/"}');
+    });
+
+    describe("inSourceMap", function() {
+        it("Should read the given string filename correctly when sourceMapIncludeSources is enabled (#1236)", function() {
+            var result = Uglify.minify(read("./test/input/issue-1236/simple.js"), {
+                sourceMap: {
+                    content: read("./test/input/issue-1236/simple.js.map"),
+                    filename: "simple.min.js",
+                    includeSources: true
+                }
+            });
+            if (result.error) throw result.error;
+            var map = JSON.parse(result.map);
+            assert.equal(map.file, "simple.min.js");
+            assert.equal(map.sourcesContent.length, 1);
+            assert.equal(map.sourcesContent[0], 'let foo = x => "foo " + x;\nconsole.log(foo("bar"));');
+        });
+        it("Should process inline source map", function() {
+            var result = Uglify.minify(read("./test/input/issue-520/input.js"), {
+                compress: { toplevel: true },
+                sourceMap: {
+                    content: "inline",
+                    includeSources: true,
+                    url: "inline"
+                }
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code + "\n", readFileSync("test/input/issue-520/output.js", "utf8"));
+        });
+        it("Should warn for missing inline source map", function() {
+            var warn_function = Uglify.AST_Node.warn_function;
+            var warnings = [];
+            Uglify.AST_Node.warn_function = function(txt) {
+                warnings.push(txt);
+            };
+            try {
+                var result = Uglify.minify(read("./test/input/issue-1323/sample.js"), {
+                    mangle: false,
+                    sourceMap: {
+                        content: "inline"
+                    }
+                });
+                assert.strictEqual(result.code, "var bar=function(bar){return bar};");
+                assert.strictEqual(warnings.length, 1);
+                assert.strictEqual(warnings[0], "inline source map not found: 0");
+            } finally {
+                Uglify.AST_Node.warn_function = warn_function;
+            }
+        });
+        it("Should handle multiple input and inline source map", function() {
+            var warn_function = Uglify.AST_Node.warn_function;
+            var warnings = [];
+            Uglify.AST_Node.warn_function = function(txt) {
+                warnings.push(txt);
+            };
+            try {
+                var result = Uglify.minify([
+                    read("./test/input/issue-520/input.js"),
+                    read("./test/input/issue-1323/sample.js"),
+                ], {
+                    sourceMap: {
+                        content: "inline",
+                        url: "inline",
+                    }
+                });
+                if (result.error) throw result.error;
+                assert.strictEqual(result.code, [
+                    "var Foo=function(){console.log(3)};new Foo;var bar=function(o){return o};",
+                    "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInN0ZGluIiwiMSJdLCJuYW1lcyI6WyJGb28iLCJjb25zb2xlIiwibG9nIiwiYmFyIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFNQSxJQUFJLFdBQWdCQyxRQUFRQyxJQUFJLElBQVMsSUFBSUYsSUNBbkQsSUFBSUcsSUFDQSxTQUFjQSxHQUNWLE9BQU9BIn0=",
+                ].join("\n"));
+                assert.strictEqual(warnings.length, 1);
+                assert.strictEqual(warnings[0], "inline source map not found: 1");
+            } finally {
+                Uglify.AST_Node.warn_function = warn_function;
+            }
+        });
+        it("Should drop source contents for includeSources=false", function() {
+            var result = Uglify.minify(read("./test/input/issue-520/input.js"), {
+                compress: false,
+                mangle: false,
+                sourceMap: {
+                    content: "inline",
+                    includeSources: true,
+                },
+            });
+            if (result.error) throw result.error;
+            var map = JSON.parse(result.map);
+            assert.strictEqual(map.sourcesContent.length, 1);
+            result = Uglify.minify(result.code, {
+                compress: false,
+                mangle: false,
+                sourceMap: {
+                    content: result.map,
+                },
+            });
+            if (result.error) throw result.error;
+            map = JSON.parse(result.map);
+            assert.ok(!("sourcesContent" in map));
+        });
+    });
+
+    describe("sourceMapInline", function() {
+        it("Should append source map to output js when sourceMapInline is enabled", function() {
+            var result = Uglify.minify('var a = function(foo) { return foo; };', {
+                sourceMap: {
+                    url: "inline"
+                }
+            });
+            if (result.error) throw result.error;
+            var code = result.code;
+            assert.strictEqual(code, "var a=function(n){return n};\n" +
+                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIjAiXSwibmFtZXMiOlsiYSIsImZvbyJdLCJtYXBwaW5ncyI6IkFBQUEsSUFBSUEsRUFBSSxTQUFTQyxHQUFPLE9BQU9BIn0=");
+        });
+        it("Should not append source map to output js when sourceMapInline is not enabled", function() {
+            var result = Uglify.minify('var a = function(foo) { return foo; };');
+            if (result.error) throw result.error;
+            var code = result.code;
+            assert.strictEqual(code, "var a=function(n){return n};");
+        });
+        it("Should work with max_line_len", function() {
+            var result = Uglify.minify(read("./test/input/issue-505/input.js"), {
+                output: {
+                    max_line_len: 20
+                },
+                sourceMap: {
+                    url: "inline"
+                }
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code, read("./test/input/issue-505/output.js"));
+        });
+        it("Should work with unicode characters", function() {
+            var code = [
+                "var tëst = '→unicøde←';",
+                "alert(tëst);",
+            ].join("\n");
+            var result = Uglify.minify(code, {
+                sourceMap: {
+                    includeSources: true,
+                    url: "inline",
+                }
+            });
+            if (result.error) throw result.error;
+            var map = JSON.parse(result.map);
+            assert.strictEqual(map.sourcesContent.length, 1);
+            assert.strictEqual(map.sourcesContent[0], code);
+            var encoded = result.code.slice(result.code.lastIndexOf(",") + 1);
+            map = JSON.parse(new Buffer(encoded, "base64").toString());
+            assert.strictEqual(map.sourcesContent.length, 1);
+            assert.strictEqual(map.sourcesContent[0], code);
+            result = Uglify.minify(result.code, {
+                sourceMap: {
+                    content: "inline",
+                    includeSources: true,
+                }
+            });
+            if (result.error) throw result.error;
+            map = JSON.parse(result.map);
+            assert.strictEqual(map.names.length, 2);
+            assert.strictEqual(map.names[0], "tëst");
+            assert.strictEqual(map.names[1], "alert");
+        });
+    });
+});

test/mocha/spidermonkey.js

@@ -23,6 +23,15 @@ describe("spidermonkey export/import sanity test", function() {
         });
     });
 
+    it("should not add unnecessary escape slashes to regexps", function() {
+        var input = "/[\\\\/]/;";
+        var ast = uglify.parse(input).to_mozilla_ast();
+        assert.equal(
+            uglify.AST_Node.from_mozilla_ast(ast).print_to_string(),
+            input
+        );
+    });
+
     it("Should judge between directives and strings correctly on import", function() {
         var tests = [
             {

test/run-tests.js

@@ -18,12 +18,8 @@ if (failures) {
     console.error("!!! " + Object.keys(failed_files).join(", "));
     process.exit(1);
 }
-
-var mocha_tests = require("./mocha.js");
-mocha_tests();
-
-var run_sourcemaps_tests = require('./sourcemaps');
-run_sourcemaps_tests();
+console.log();
+require("./mocha.js");
 
 /* -----[ utils ]----- */
 
@@ -49,16 +45,9 @@ function log_test(name) {
 }
 
 function find_test_files(dir) {
-    var files = fs.readdirSync(dir).filter(function(name){
+    return fs.readdirSync(dir).filter(function(name) {
         return /\.js$/i.test(name);
     });
-    if (process.argv.length > 2) {
-        var x = process.argv.slice(2);
-        files = files.filter(function(f){
-            return x.indexOf(f) >= 0;
-        });
-    }
-    return files;
 }
 
 function test_directory(dir) {
@@ -182,7 +171,7 @@ function run_compress_tests() {
             }
             if (test.expect_stdout
                 && (!test.node_version || semver.satisfies(process.version, test.node_version))) {
-                var stdout = sandbox.run_code(input_code, true);
+                var stdout = run_code(input_code);
                 if (test.expect_stdout === true) {
                     test.expect_stdout = stdout;
                 }
@@ -196,7 +185,7 @@ function run_compress_tests() {
                     });
                     return false;
                 }
-                stdout = sandbox.run_code(output, true);
+                stdout = run_code(output);
                 if (!sandbox.same_stdout(test.expect_stdout, stdout)) {
                     log("!!! failed\n---INPUT---\n{input}\n---EXPECTED {expected_type}---\n{expected}\n---ACTUAL {actual_type}---\n{actual}\n\n", {
                         input: input_formatted,
@@ -354,6 +343,11 @@ function evaluate(code) {
     return new Function("return(" + code + ")")();
 }
 
+function run_code(code) {
+    var result = sandbox.run_code(code, true);
+    return typeof result == "string" ? result.replace(/\u001b\[\d+m/g, "") : result;
+}
+
 // Try to reminify original input with standard options
 // to see if it matches expect_stdout.
 function reminify(orig_options, input_code, input_formatted, expect_stdout) {
@@ -377,7 +371,7 @@ function reminify(orig_options, input_code, input_formatted, expect_stdout) {
             });
             return false;
         } else {
-            var stdout = sandbox.run_code(result.code, true);
+            var stdout = run_code(result.code);
             if (typeof expect_stdout != "string" && typeof stdout != "string" && expect_stdout.name == stdout.name) {
                 stdout = expect_stdout;
             }

test/sandbox.js

@@ -2,12 +2,9 @@ var semver = require("semver");
 var vm = require("vm");
 
 function createContext() {
-    var context = Object.create(null);
-    Object.defineProperty(context, "console", {
-        value: function() {
-            var con = Object.create(null);
-            Object.defineProperty(con, "log", {
-                value: function(msg) {
+    return vm.createContext(Object.defineProperty({}, "console", {
+        value: {
+            log: function(msg) {
                 if (arguments.length == 1 && typeof msg == "string") {
                     return console.log("%s", msg);
                 }
@@ -15,11 +12,8 @@ function createContext() {
                     return safe_log(arg, 3);
                 }));
             }
-            });
-            return con;
-        }()
-    });
-    return vm.createContext(context);
+        }
+    }));
 }
 
 function safe_log(arg, level) {
@@ -40,7 +34,7 @@ function safe_log(arg, level) {
 }
 
 function strip_func_ids(text) {
-    return text.toString().replace(/F[0-9]{6}N/g, "<F<>N>");
+    return ("" + text).replace(/F[0-9]{6}N/g, "<F<>N>");
 }
 
 var context;

test/sourcemaps.js

@@ -1,40 +0,0 @@
-var UglifyJS = require("..");
-var ok = require("assert");
-
-module.exports = function () {
-    console.log("--- Sourcemaps tests");
-
-    var basic = source_map([
-        'var x = 1 + 1;'
-    ].join('\n'));
-
-    ok.equal(basic.version, 3);
-    ok.deepEqual(basic.names, ['x']);
-
-    var issue836 = source_map([
-        "({",
-        "    get enabled() {",
-        "        return 3;",
-        "    },",
-        "    set enabled(x) {",
-        "        ;",
-        "    }",
-        "});",
-    ].join("\n"));
-
-    ok.deepEqual(issue836.names, ['enabled', 'x']);
-}
-
-function source_map(js) {
-    return JSON.parse(UglifyJS.minify(js, {
-        compress: false,
-        mangle: false,
-        sourceMap: true
-    }).map);
-}
-
-// Run standalone
-if (module.parent === null) {
-    module.exports();
-}
-

test/ufuzz.json

@@ -18,6 +18,13 @@
     {
         "toplevel": true
     },
+    {
+        "compress": {
+            "passes": 1e6,
+            "unsafe": true
+        },
+        "toplevel": true
+    },
     {
         "compress": {
             "keep_fargs": false,