v3.4.2

fixes #3197

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);
@@ -148,7 +148,7 @@ var AST_SimpleStatement = DEFNODE("SimpleStatement", "body", {
         body: "[AST_Node] an expression node (should not be instanceof AST_Statement)"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.body._walk(visitor);
         });
     }
@@ -158,11 +158,10 @@ function walk_body(node, visitor) {
     var body = node.body;
     if (body instanceof AST_Statement) {
         body._walk(visitor);
-    }
-    else for (var i = 0, len = body.length; i < len; i++) {
-        body[i]._walk(visitor);
-    }
-};
+    } else body.forEach(function(node) {
+        node._walk(visitor);
+    });
+}
 
 var AST_Block = DEFNODE("Block", "body", {
     $documentation: "A body of statements (usually braced)",
@@ -170,7 +169,7 @@ var AST_Block = DEFNODE("Block", "body", {
         body: "[AST_Statement*] an array of statements"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             walk_body(this, visitor);
         });
     }
@@ -197,7 +196,7 @@ var AST_LabeledStatement = DEFNODE("LabeledStatement", "label", {
         label: "[AST_Label] a label definition"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.label._walk(visitor);
             this.body._walk(visitor);
         });
@@ -233,7 +232,7 @@ var AST_DWLoop = DEFNODE("DWLoop", "condition", {
 var AST_Do = DEFNODE("Do", null, {
     $documentation: "A `do` statement",
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.body._walk(visitor);
             this.condition._walk(visitor);
         });
@@ -243,7 +242,7 @@ var AST_Do = DEFNODE("Do", null, {
 var AST_While = DEFNODE("While", null, {
     $documentation: "A `while` statement",
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.condition._walk(visitor);
             this.body._walk(visitor);
         });
@@ -258,7 +257,7 @@ var AST_For = DEFNODE("For", "init condition step", {
         step: "[AST_Node?] the `for` update clause, or null if empty"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             if (this.init) this.init._walk(visitor);
             if (this.condition) this.condition._walk(visitor);
             if (this.step) this.step._walk(visitor);
@@ -274,7 +273,7 @@ var AST_ForIn = DEFNODE("ForIn", "init object", {
         object: "[AST_Node] the object that we're looping through"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.init._walk(visitor);
             this.object._walk(visitor);
             this.body._walk(visitor);
@@ -288,7 +287,7 @@ var AST_With = DEFNODE("With", "expression", {
         expression: "[AST_Node] the `with` expression"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.expression._walk(visitor);
             this.body._walk(visitor);
         });
@@ -329,7 +328,7 @@ var AST_Toplevel = DEFNODE("Toplevel", "globals", {
         var body = this.body;
         var wrapped_tl = "(function(exports){'$ORIG';})(typeof " + name + "=='undefined'?(" + name + "={}):" + name + ");";
         wrapped_tl = parse(wrapped_tl);
-        wrapped_tl = wrapped_tl.transform(new TreeTransformer(function before(node){
+        wrapped_tl = wrapped_tl.transform(new TreeTransformer(function before(node) {
             if (node instanceof AST_Directive && node.value == "$ORIG") {
                 return MAP.splice(body);
             }
@@ -363,12 +362,11 @@ var AST_Lambda = DEFNODE("Lambda", "name argnames uses_arguments", {
         uses_arguments: "[boolean/S] tells whether this function accesses the arguments array"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        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);
         });
     }
@@ -398,7 +396,7 @@ var AST_Exit = DEFNODE("Exit", "value", {
         value: "[AST_Node?] the value returned or thrown by this statement; could be null for AST_Return"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, this.value && function(){
+        return visitor._visit(this, this.value && function() {
             this.value._walk(visitor);
         });
     }
@@ -418,7 +416,7 @@ var AST_LoopControl = DEFNODE("LoopControl", "label", {
         label: "[AST_LabelRef?] the label, or null if none",
     },
     _walk: function(visitor) {
-        return visitor._visit(this, this.label && function(){
+        return visitor._visit(this, this.label && function() {
             this.label._walk(visitor);
         });
     }
@@ -441,7 +439,7 @@ var AST_If = DEFNODE("If", "condition alternative", {
         alternative: "[AST_Statement?] the `else` part, or null if not present"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.condition._walk(visitor);
             this.body._walk(visitor);
             if (this.alternative) this.alternative._walk(visitor);
@@ -457,7 +455,7 @@ var AST_Switch = DEFNODE("Switch", "expression", {
         expression: "[AST_Node] the `switch` “discriminant”"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.expression._walk(visitor);
             walk_body(this, visitor);
         });
@@ -478,7 +476,7 @@ var AST_Case = DEFNODE("Case", "expression", {
         expression: "[AST_Node] the `case` expression"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.expression._walk(visitor);
             walk_body(this, visitor);
         });
@@ -494,7 +492,7 @@ var AST_Try = DEFNODE("Try", "bcatch bfinally", {
         bfinally: "[AST_Finally?] the finally block, or null if not present"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             walk_body(this, visitor);
             if (this.bcatch) this.bcatch._walk(visitor);
             if (this.bfinally) this.bfinally._walk(visitor);
@@ -508,7 +506,7 @@ var AST_Catch = DEFNODE("Catch", "argname", {
         argname: "[AST_SymbolCatch] symbol for the exception"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.argname._walk(visitor);
             walk_body(this, visitor);
         });
@@ -527,11 +525,10 @@ var AST_Definitions = DEFNODE("Definitions", "definitions", {
         definitions: "[AST_VarDef*] array of variable 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);
-            }
+        return visitor._visit(this, function() {
+            this.definitions.forEach(function(defn) {
+                defn._walk(visitor);
+            });
         });
     }
 }, AST_Statement);
@@ -547,7 +544,7 @@ var AST_VarDef = DEFNODE("VarDef", "name value", {
         value: "[AST_Node?] initializer, or null of there's no initializer"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.name._walk(visitor);
             if (this.value) this.value._walk(visitor);
         });
@@ -582,7 +579,7 @@ var AST_Sequence = DEFNODE("Sequence", "expressions", {
         expressions: "[AST_Node*] array of expressions (at least two)"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.expressions.forEach(function(node) {
                 node._walk(visitor);
             });
@@ -601,7 +598,7 @@ var AST_PropAccess = DEFNODE("PropAccess", "expression property", {
 var AST_Dot = DEFNODE("Dot", null, {
     $documentation: "A dotted property access expression",
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.expression._walk(visitor);
         });
     }
@@ -610,7 +607,7 @@ var AST_Dot = DEFNODE("Dot", null, {
 var AST_Sub = DEFNODE("Sub", null, {
     $documentation: "Index-style property access, i.e. `a[\"foo\"]`",
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.expression._walk(visitor);
             this.property._walk(visitor);
         });
@@ -624,7 +621,7 @@ var AST_Unary = DEFNODE("Unary", "operator expression", {
         expression: "[AST_Node] expression that this unary operator applies to"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.expression._walk(visitor);
         });
     }
@@ -646,7 +643,7 @@ var AST_Binary = DEFNODE("Binary", "operator left right", {
         right: "[AST_Node] right-hand side expression"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.left._walk(visitor);
             this.right._walk(visitor);
         });
@@ -661,7 +658,7 @@ var AST_Conditional = DEFNODE("Conditional", "condition consequent alternative",
         alternative: "[AST_Node]"
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.condition._walk(visitor);
             this.consequent._walk(visitor);
             this.alternative._walk(visitor);
@@ -681,11 +678,10 @@ var AST_Array = DEFNODE("Array", "elements", {
         elements: "[AST_Node*] array of 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);
-            }
+        return visitor._visit(this, function() {
+            this.elements.forEach(function(element) {
+                element._walk(visitor);
+            });
         });
     }
 });
@@ -696,11 +692,10 @@ var AST_Object = DEFNODE("Object", "properties", {
         properties: "[AST_ObjectProperty*] array of 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);
-            }
+        return visitor._visit(this, function() {
+            this.properties.forEach(function(prop) {
+                prop._walk(visitor);
+            });
         });
     }
 });
@@ -712,7 +707,7 @@ var AST_ObjectProperty = DEFNODE("ObjectProperty", "key value", {
         value: "[AST_Node] property value.  For getters and setters this is an AST_Accessor."
     },
     _walk: function(visitor) {
-        return visitor._visit(this, function(){
+        return visitor._visit(this, function() {
             this.value._walk(visitor);
         });
     }
@@ -839,12 +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, {
@@ -872,11 +867,11 @@ function TreeWalker(callback) {
     this.visit = callback;
     this.stack = [];
     this.directives = Object.create(null);
-};
+}
 TreeWalker.prototype = {
     _visit: function(node, descend) {
         this.push(node);
-        var ret = this.visit(node, descend ? function(){
+        var ret = this.visit(node, descend ? function() {
             descend.call(node);
         } : noop);
         if (!ret && descend) {

lib/mozilla-ast.js

@@ -43,11 +43,9 @@
 
 "use strict";
 
-(function(){
-
-    var normalize_directives = function(body) {
+(function() {
+    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) {
@@ -129,7 +126,7 @@
             return new AST_Array({
                 start    : my_start_token(M),
                 end      : my_end_token(M),
-                elements : M.elements.map(function(elem){
+                elements : M.elements.map(function(elem) {
                     return elem === null ? new AST_Hole() : from_moz(elem);
                 })
             });
@@ -138,7 +135,7 @@
             return new AST_Object({
                 start      : my_start_token(M),
                 end        : my_end_token(M),
-                properties : M.properties.map(function(prop){
+                properties : M.properties.map(function(prop) {
                     prop.type = "Property";
                     return from_moz(prop)
                 })
@@ -480,7 +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;
@@ -495,7 +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";
@@ -507,7 +504,7 @@
         me_to_moz += "return {\n" +
             "type: " + JSON.stringify(moztype);
 
-        if (propmap) propmap.split(/\s*,\s*/).forEach(function(prop){
+        if (propmap) propmap.split(/\s*,\s*/).forEach(function(prop) {
             var m = /([a-z0-9$_]+)(=|@|>|%)([a-z0-9$_]+)/i.exec(prop);
             if (!m) throw new Error("Can't understand property map: " + prop);
             var moz = m[1], how = m[2], my = m[3];
@@ -550,7 +547,7 @@
         );
         MOZ_TO_ME[moztype] = moz_to_me;
         def_to_moz(mytype, me_to_moz);
-    };
+    }
 
     var FROM_MOZ_STACK = null;
 
@@ -559,9 +556,9 @@
         var ret = node != null ? MOZ_TO_ME[node.type](node) : null;
         FROM_MOZ_STACK.pop();
         return ret;
-    };
+    }
 
-    AST_Node.from_mozilla_ast = function(node){
+    AST_Node.from_mozilla_ast = function(node) {
         var save_stack = FROM_MOZ_STACK;
         FROM_MOZ_STACK = [];
         var ast = from_moz(node);
@@ -600,24 +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);
@@ -628,5 +625,5 @@
             type: type,
             body: body
         };
-    };
+    }
 })();

lib/output.js

@@ -137,7 +137,7 @@ function OutputStream(options) {
     function make_string(str, quote) {
         var dq = 0, sq = 0;
         str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g,
-          function(s, i){
+          function(s, i) {
             switch (s) {
               case '"': ++dq; return '"';
               case "'": ++sq; return "'";
@@ -408,7 +408,7 @@ function OutputStream(options) {
         var ret;
         print("{");
         newline();
-        with_indent(next_indent(), function(){
+        with_indent(next_indent(), function() {
             ret = cont();
         });
         indent();
@@ -631,7 +631,7 @@ function OutputStream(options) {
 
 /* -----[ code generators ]----- */
 
-(function(){
+(function() {
 
     /* -----[ utils ]----- */
 
@@ -643,7 +643,7 @@ function OutputStream(options) {
     var active_scope = null;
     var use_asm = null;
 
-    AST_Node.DEFMETHOD("print", function(stream, force_parens){
+    AST_Node.DEFMETHOD("print", function(stream, force_parens) {
         var self = this, generator = self._codegen;
         if (self instanceof AST_Scope) {
             active_scope = self;
@@ -670,7 +670,7 @@ function OutputStream(options) {
     });
     AST_Node.DEFMETHOD("_print", AST_Node.prototype.print);
 
-    AST_Node.DEFMETHOD("print_to_string", function(options){
+    AST_Node.DEFMETHOD("print_to_string", function(options) {
         var s = OutputStream(options);
         this.print(s);
         return s.get();
@@ -680,7 +680,7 @@ function OutputStream(options) {
 
     function PARENS(nodetype, func) {
         if (Array.isArray(nodetype)) {
-            nodetype.forEach(function(nodetype){
+            nodetype.forEach(function(nodetype) {
                 PARENS(nodetype, func);
             });
         } else {
@@ -692,7 +692,7 @@ function OutputStream(options) {
 
     // a function expression needs parens around it when it's provably
     // the first token to appear in a statement.
-    PARENS(AST_Function, function(output){
+    PARENS(AST_Function, function(output) {
         if (!output.has_parens() && first_in_statement(output)) {
             return true;
         }
@@ -714,17 +714,17 @@ function OutputStream(options) {
 
     // same goes for an object literal, because otherwise it would be
     // interpreted as a block of code.
-    PARENS(AST_Object, function(output){
+    PARENS(AST_Object, function(output) {
         return !output.has_parens() && first_in_statement(output);
     });
 
-    PARENS(AST_Unary, function(output){
+    PARENS(AST_Unary, function(output) {
         var p = output.parent();
         return p instanceof AST_PropAccess && p.expression === this
             || p instanceof AST_Call && p.expression === this;
     });
 
-    PARENS(AST_Sequence, function(output){
+    PARENS(AST_Sequence, function(output) {
         var p = output.parent();
         return p instanceof AST_Call             // (foo, bar)() or foo(1, (2, 3), 4)
             || p instanceof AST_Unary            // !(foo, bar, baz)
@@ -738,7 +738,7 @@ function OutputStream(options) {
         ;
     });
 
-    PARENS(AST_Binary, function(output){
+    PARENS(AST_Binary, function(output) {
         var p = output.parent();
         // (foo && bar)()
         if (p instanceof AST_Call && p.expression === this)
@@ -761,7 +761,7 @@ function OutputStream(options) {
         }
     });
 
-    PARENS(AST_PropAccess, function(output){
+    PARENS(AST_PropAccess, function(output) {
         var p = output.parent();
         if (p instanceof AST_New && p.expression === this) {
             // i.e. new (foo.bar().baz)
@@ -782,7 +782,7 @@ function OutputStream(options) {
         }
     });
 
-    PARENS(AST_Call, function(output){
+    PARENS(AST_Call, function(output) {
         var p = output.parent(), p1;
         if (p instanceof AST_New && p.expression === this)
             return true;
@@ -796,7 +796,7 @@ function OutputStream(options) {
             && p1.left === p;
     });
 
-    PARENS(AST_New, function(output){
+    PARENS(AST_New, function(output) {
         var p = output.parent();
         if (!need_constructor_parens(this, output)
             && (p instanceof AST_PropAccess // (new Date).getTime(), (new Date)["getTime"]()
@@ -804,7 +804,7 @@ function OutputStream(options) {
             return true;
     });
 
-    PARENS(AST_Number, function(output){
+    PARENS(AST_Number, function(output) {
         var p = output.parent();
         if (p instanceof AST_PropAccess && p.expression === this) {
             var value = this.getValue();
@@ -814,7 +814,7 @@ function OutputStream(options) {
         }
     });
 
-    PARENS([ AST_Assign, AST_Conditional ], function(output){
+    PARENS([ AST_Assign, AST_Conditional ], function(output) {
         var p = output.parent();
         // !(a = false) → true
         if (p instanceof AST_Unary)
@@ -835,11 +835,11 @@ function OutputStream(options) {
 
     /* -----[ PRINTERS ]----- */
 
-    DEFPRINT(AST_Directive, function(self, output){
+    DEFPRINT(AST_Directive, function(self, output) {
         output.print_string(self.value, self.quote);
         output.semicolon();
     });
-    DEFPRINT(AST_Debugger, function(self, output){
+    DEFPRINT(AST_Debugger, function(self, output) {
         output.print("debugger");
         output.semicolon();
     });
@@ -849,7 +849,7 @@ function OutputStream(options) {
     function display_body(body, is_toplevel, output, allow_directives) {
         var last = body.length - 1;
         in_directive = allow_directives;
-        body.forEach(function(stmt, i){
+        body.forEach(function(stmt, i) {
             if (in_directive === true && !(stmt instanceof AST_Directive ||
                 stmt instanceof AST_EmptyStatement ||
                 (stmt instanceof AST_SimpleStatement && stmt.body instanceof AST_String)
@@ -874,24 +874,24 @@ function OutputStream(options) {
         in_directive = false;
     }
 
-    AST_StatementWithBody.DEFMETHOD("_do_print_body", function(output){
+    AST_StatementWithBody.DEFMETHOD("_do_print_body", function(output) {
         force_statement(this.body, output);
     });
 
-    DEFPRINT(AST_Statement, function(self, output){
+    DEFPRINT(AST_Statement, function(self, output) {
         self.body.print(output);
         output.semicolon();
     });
-    DEFPRINT(AST_Toplevel, function(self, output){
+    DEFPRINT(AST_Toplevel, function(self, output) {
         display_body(self.body, true, output, true);
         output.print("");
     });
-    DEFPRINT(AST_LabeledStatement, function(self, output){
+    DEFPRINT(AST_LabeledStatement, function(self, output) {
         self.label.print(output);
         output.colon();
         self.body.print(output);
     });
-    DEFPRINT(AST_SimpleStatement, function(self, output){
+    DEFPRINT(AST_SimpleStatement, function(self, output) {
         self.body.print(output);
         output.semicolon();
     });
@@ -909,37 +909,37 @@ function OutputStream(options) {
             });
         } else print_braced_empty(self, output);
     }
-    DEFPRINT(AST_BlockStatement, function(self, output){
+    DEFPRINT(AST_BlockStatement, function(self, output) {
         print_braced(self, output);
     });
-    DEFPRINT(AST_EmptyStatement, function(self, output){
+    DEFPRINT(AST_EmptyStatement, function(self, output) {
         output.semicolon();
     });
-    DEFPRINT(AST_Do, function(self, output){
+    DEFPRINT(AST_Do, function(self, output) {
         output.print("do");
         output.space();
         make_block(self.body, output);
         output.space();
         output.print("while");
         output.space();
-        output.with_parens(function(){
+        output.with_parens(function() {
             self.condition.print(output);
         });
         output.semicolon();
     });
-    DEFPRINT(AST_While, function(self, output){
+    DEFPRINT(AST_While, function(self, output) {
         output.print("while");
         output.space();
-        output.with_parens(function(){
+        output.with_parens(function() {
             self.condition.print(output);
         });
         output.space();
         self._do_print_body(output);
     });
-    DEFPRINT(AST_For, function(self, output){
+    DEFPRINT(AST_For, function(self, output) {
         output.print("for");
         output.space();
-        output.with_parens(function(){
+        output.with_parens(function() {
             if (self.init) {
                 if (self.init instanceof AST_Definitions) {
                     self.init.print(output);
@@ -965,10 +965,10 @@ function OutputStream(options) {
         output.space();
         self._do_print_body(output);
     });
-    DEFPRINT(AST_ForIn, function(self, output){
+    DEFPRINT(AST_ForIn, function(self, output) {
         output.print("for");
         output.space();
-        output.with_parens(function(){
+        output.with_parens(function() {
             self.init.print(output);
             output.space();
             output.print("in");
@@ -978,10 +978,10 @@ function OutputStream(options) {
         output.space();
         self._do_print_body(output);
     });
-    DEFPRINT(AST_With, function(self, output){
+    DEFPRINT(AST_With, function(self, output) {
         output.print("with");
         output.space();
-        output.with_parens(function(){
+        output.with_parens(function() {
             self.expression.print(output);
         });
         output.space();
@@ -989,7 +989,7 @@ function OutputStream(options) {
     });
 
     /* -----[ functions ]----- */
-    AST_Lambda.DEFMETHOD("_do_print", function(output, nokeyword){
+    AST_Lambda.DEFMETHOD("_do_print", function(output, nokeyword) {
         var self = this;
         if (!nokeyword) {
             output.print("function");
@@ -998,8 +998,8 @@ function OutputStream(options) {
             output.space();
             self.name.print(output);
         }
-        output.with_parens(function(){
-            self.argnames.forEach(function(arg, i){
+        output.with_parens(function() {
+            self.argnames.forEach(function(arg, i) {
                 if (i) output.comma();
                 arg.print(output);
             });
@@ -1007,40 +1007,31 @@ function OutputStream(options) {
         output.space();
         print_braced(self, output, true);
     });
-    DEFPRINT(AST_Lambda, function(self, output){
+    DEFPRINT(AST_Lambda, function(self, output) {
         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");
-    });
-    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();
+    DEFPRINT(AST_Return, function(self, output) {
+        print_jump(output, "return", self.value);
     });
-    DEFPRINT(AST_Break, function(self, output){
-        self._do_print(output, "break");
+    DEFPRINT(AST_Throw, function(self, output) {
+        print_jump(output, "throw", self.value);
     });
-    DEFPRINT(AST_Continue, function(self, output){
-        self._do_print(output, "continue");
+    DEFPRINT(AST_Break, function(self, output) {
+        print_jump(output, "break", self.label);
+    });
+    DEFPRINT(AST_Continue, function(self, output) {
+        print_jump(output, "continue", self.label);
     });
 
     /* -----[ if ]----- */
@@ -1072,10 +1063,10 @@ function OutputStream(options) {
         }
         force_statement(self.body, output);
     }
-    DEFPRINT(AST_If, function(self, output){
+    DEFPRINT(AST_If, function(self, output) {
         output.print("if");
         output.space();
-        output.with_parens(function(){
+        output.with_parens(function() {
             self.condition.print(output);
         });
         output.space();
@@ -1094,17 +1085,17 @@ function OutputStream(options) {
     });
 
     /* -----[ switch ]----- */
-    DEFPRINT(AST_Switch, function(self, output){
+    DEFPRINT(AST_Switch, function(self, output) {
         output.print("switch");
         output.space();
-        output.with_parens(function(){
+        output.with_parens(function() {
             self.expression.print(output);
         });
         output.space();
         var last = self.body.length - 1;
         if (last < 0) print_braced_empty(self, output);
-        else output.with_block(function(){
-            self.body.forEach(function(branch, i){
+        else output.with_block(function() {
+            self.body.forEach(function(branch, i) {
                 output.indent(true);
                 branch.print(output);
                 if (i < last && branch.body.length > 0)
@@ -1112,19 +1103,19 @@ function OutputStream(options) {
             });
         });
     });
-    AST_SwitchBranch.DEFMETHOD("_do_print_body", function(output){
+    AST_SwitchBranch.DEFMETHOD("_do_print_body", function(output) {
         output.newline();
-        this.body.forEach(function(stmt){
+        this.body.forEach(function(stmt) {
             output.indent();
             stmt.print(output);
             output.newline();
         });
     });
-    DEFPRINT(AST_Default, function(self, output){
+    DEFPRINT(AST_Default, function(self, output) {
         output.print("default:");
         self._do_print_body(output);
     });
-    DEFPRINT(AST_Case, function(self, output){
+    DEFPRINT(AST_Case, function(self, output) {
         output.print("case");
         output.space();
         self.expression.print(output);
@@ -1133,7 +1124,7 @@ function OutputStream(options) {
     });
 
     /* -----[ exceptions ]----- */
-    DEFPRINT(AST_Try, function(self, output){
+    DEFPRINT(AST_Try, function(self, output) {
         output.print("try");
         output.space();
         print_braced(self, output);
@@ -1146,37 +1137,30 @@ function OutputStream(options) {
             self.bfinally.print(output);
         }
     });
-    DEFPRINT(AST_Catch, function(self, output){
+    DEFPRINT(AST_Catch, function(self, output) {
         output.print("catch");
         output.space();
-        output.with_parens(function(){
+        output.with_parens(function() {
             self.argname.print(output);
         });
         output.space();
         print_braced(self, output);
     });
-    DEFPRINT(AST_Finally, function(self, output){
+    DEFPRINT(AST_Finally, function(self, output) {
         output.print("finally");
         output.space();
         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) {
@@ -1193,7 +1177,7 @@ function OutputStream(options) {
         node.print(output, parens);
     }
 
-    DEFPRINT(AST_VarDef, function(self, output){
+    DEFPRINT(AST_VarDef, function(self, output) {
         self.name.print(output);
         if (self.value) {
             output.space();
@@ -1206,28 +1190,27 @@ function OutputStream(options) {
     });
 
     /* -----[ other expressions ]----- */
-    DEFPRINT(AST_Call, function(self, output){
+    DEFPRINT(AST_Call, function(self, output) {
         self.expression.print(output);
         if (self instanceof AST_New && !need_constructor_parens(self, output))
             return;
         if (self.expression instanceof AST_Call || self.expression instanceof AST_Lambda) {
             output.add_mapping(self.start);
         }
-        output.with_parens(function(){
-            self.args.forEach(function(expr, i){
+        output.with_parens(function() {
+            self.args.forEach(function(expr, i) {
                 if (i) output.comma();
                 expr.print(output);
             });
         });
     });
-    DEFPRINT(AST_New, function(self, output){
+    DEFPRINT(AST_New, function(self, output) {
         output.print("new");
         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()) {
@@ -1238,18 +1221,7 @@ 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){
+    DEFPRINT(AST_Dot, function(self, output) {
         var expr = self.expression;
         expr.print(output);
         var prop = self.property;
@@ -1270,13 +1242,13 @@ function OutputStream(options) {
             output.print_name(prop);
         }
     });
-    DEFPRINT(AST_Sub, function(self, output){
+    DEFPRINT(AST_Sub, function(self, output) {
         self.expression.print(output);
         output.print("[");
         self.property.print(output);
         output.print("]");
     });
-    DEFPRINT(AST_UnaryPrefix, function(self, output){
+    DEFPRINT(AST_UnaryPrefix, function(self, output) {
         var op = self.operator;
         output.print(op);
         if (/^[a-z]/i.test(op)
@@ -1287,11 +1259,11 @@ function OutputStream(options) {
         }
         self.expression.print(output);
     });
-    DEFPRINT(AST_UnaryPostfix, function(self, output){
+    DEFPRINT(AST_UnaryPostfix, function(self, output) {
         self.expression.print(output);
         output.print(self.operator);
     });
-    DEFPRINT(AST_Binary, function(self, output){
+    DEFPRINT(AST_Binary, function(self, output) {
         var op = self.operator;
         self.left.print(output);
         if (op[0] == ">" /* ">>" ">>>" ">" ">=" */
@@ -1317,7 +1289,7 @@ function OutputStream(options) {
         }
         self.right.print(output);
     });
-    DEFPRINT(AST_Conditional, function(self, output){
+    DEFPRINT(AST_Conditional, function(self, output) {
         self.condition.print(output);
         output.space();
         output.print("?");
@@ -1329,11 +1301,11 @@ function OutputStream(options) {
     });
 
     /* -----[ literals ]----- */
-    DEFPRINT(AST_Array, function(self, output){
-        output.with_square(function(){
+    DEFPRINT(AST_Array, function(self, output) {
+        output.with_square(function() {
             var a = self.elements, len = a.length;
             if (len > 0) output.space();
-            a.forEach(function(exp, i){
+            a.forEach(function(exp, i) {
                 if (i) output.comma();
                 exp.print(output);
                 // If the final element is a hole, we need to make sure it
@@ -1345,9 +1317,9 @@ function OutputStream(options) {
             if (len > 0) output.space();
         });
     });
-    DEFPRINT(AST_Object, function(self, output){
-        if (self.properties.length > 0) output.with_block(function(){
-            self.properties.forEach(function(prop, i){
+    DEFPRINT(AST_Object, function(self, output) {
+        if (self.properties.length > 0) output.with_block(function() {
+            self.properties.forEach(function(prop, i) {
                 if (i) {
                     output.print(",");
                     output.newline();
@@ -1376,7 +1348,7 @@ function OutputStream(options) {
         }
     }
 
-    DEFPRINT(AST_ObjectKeyVal, function(self, output){
+    DEFPRINT(AST_ObjectKeyVal, function(self, output) {
         print_property_name(self.key, self.quote, output);
         output.colon();
         self.value.print(output);
@@ -1387,27 +1359,27 @@ function OutputStream(options) {
         print_property_name(this.key.name, this.quote, output);
         this.value._do_print(output, true);
     });
-    DEFPRINT(AST_ObjectSetter, function(self, output){
+    DEFPRINT(AST_ObjectSetter, function(self, output) {
         self._print_getter_setter("set", output);
     });
-    DEFPRINT(AST_ObjectGetter, function(self, output){
+    DEFPRINT(AST_ObjectGetter, function(self, output) {
         self._print_getter_setter("get", output);
     });
-    DEFPRINT(AST_Symbol, function(self, output){
+    DEFPRINT(AST_Symbol, function(self, output) {
         var def = self.definition();
         output.print_name(def ? def.mangled_name || def.name : self.name);
     });
     DEFPRINT(AST_Hole, noop);
-    DEFPRINT(AST_This, function(self, output){
+    DEFPRINT(AST_This, function(self, output) {
         output.print("this");
     });
-    DEFPRINT(AST_Constant, function(self, output){
+    DEFPRINT(AST_Constant, function(self, output) {
         output.print(self.getValue());
     });
-    DEFPRINT(AST_String, function(self, output){
+    DEFPRINT(AST_String, function(self, output) {
         output.print_string(self.getValue(), self.quote, in_directive);
     });
-    DEFPRINT(AST_Number, function(self, output){
+    DEFPRINT(AST_Number, function(self, output) {
         if (use_asm && self.start && self.start.raw != null) {
             output.print(self.start.raw);
         } else {
@@ -1415,7 +1387,7 @@ function OutputStream(options) {
         }
     });
 
-    DEFPRINT(AST_RegExp, function(self, output){
+    DEFPRINT(AST_RegExp, function(self, output) {
         var regexp = self.getValue();
         var str = regexp.toString();
         if (regexp.raw_source) {
@@ -1487,7 +1459,7 @@ function OutputStream(options) {
             output.print("{}");
         else if (stmt instanceof AST_BlockStatement)
             stmt.print(output);
-        else output.with_block(function(){
+        else output.with_block(function() {
             output.indent();
             stmt.print(output);
             output.newline();

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);
-};
+}
 
 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){
+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 = {};
 
@@ -239,7 +239,9 @@ 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++);
@@ -258,15 +260,15 @@ 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;
@@ -276,19 +278,19 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
                 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) {
@@ -321,27 +323,27 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         }
         S.newline_before = false;
         return new AST_Token(ret);
-    };
+    }
 
     function skip_whitespace() {
         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 == ".";
-        var num = read_while(function(ch, i){
+        var num = read_while(function(ch, i) {
             var code = ch.charCodeAt(0);
             switch (code) {
               case 120: case 88: // xX
@@ -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
@@ -417,9 +419,9 @@ 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 read_string = with_eof_error("Unterminated string constant", function(quote_char) {
         var quote = next(), ret = "";
         for (;;) {
             var ch = next(true, true);
@@ -447,9 +449,9 @@ 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 skip_multiline_comment = with_eof_error("Unterminated multiline comment", function() {
         var regex_allowed = S.regex_allowed;
         var i = find("*/", true);
         var text = S.text.substring(S.pos, i).replace(/\r\n|\r|\u2028|\u2029/g, '\n');
@@ -481,7 +483,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
             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;
@@ -523,9 +525,9 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
             } else {
                 return op;
             }
-        };
+        }
         return token("operator", grow(prefix || next()));
-    };
+    }
 
     function handle_slash() {
         next();
@@ -538,14 +540,14 @@ 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();
@@ -554,7 +556,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
             : !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)
@@ -609,7 +611,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
             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) {
@@ -674,28 +675,24 @@ var PRECEDENCE = (function(a, ret){
         }
     }
     return ret;
-})(
-    [
-        ["||"],
-        ["&&"],
-        ["|"],
-        ["^"],
-        ["&"],
-        ["==", "===", "!=", "!=="],
-        ["<", ">", "<=", ">=", "in", "instanceof"],
-        [">>", "<<", ">>>"],
-        ["+", "-"],
-        ["*", "/", "%"]
-    ],
-    {}
-);
+}([
+    ["||"],
+    ["&&"],
+    ["|"],
+    ["^"],
+    ["&"],
+    ["==", "===", "!=", "!=="],
+    ["<", ">", "<=", ">=", "in", "instanceof"],
+    [">>", "<<", ">>>"],
+    ["+", "-"],
+    ["*", "/", "%"]
+], {});
 
 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();
@@ -986,7 +987,7 @@ function parse($TEXT, options) {
             // check for `continue` that refers to this label.
             // those should be reported as syntax errors.
             // https://github.com/mishoo/UglifyJS2/issues/287
-            label.references.forEach(function(ref){
+            label.references.forEach(function(ref) {
                 if (ref instanceof AST_Continue) {
                     ref = ref.label.start;
                     croak("Continue label `" + label.name + "` refers to non-IterationStatement.",
@@ -995,11 +996,11 @@ function parse($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;
@@ -1007,18 +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("(");
@@ -1039,7 +1039,7 @@ function parse($TEXT, options) {
             }
         }
         return regular_for(init);
-    };
+    }
 
     function regular_for(init) {
         expect(";");
@@ -1053,7 +1053,7 @@ function parse($TEXT, options) {
             step      : step,
             body      : in_loop(statement)
         });
-    };
+    }
 
     function for_in(init) {
         var obj = expression(true);
@@ -1063,7 +1063,7 @@ function parse($TEXT, options) {
             object : obj,
             body   : in_loop(statement)
         });
-    };
+    }
 
     var function_ = function(ctor) {
         var in_statement = ctor === AST_Defun;
@@ -1113,7 +1113,7 @@ function parse($TEXT, options) {
             body        : body,
             alternative : belse
         });
-    };
+    }
 
     function block_(strict_defun) {
         expect("{");
@@ -1124,7 +1124,7 @@ function parse($TEXT, options) {
         }
         next();
         return a;
-    };
+    }
 
     function switch_body_() {
         expect("{");
@@ -1159,7 +1159,7 @@ function parse($TEXT, options) {
         if (branch) branch.end = prev();
         next();
         return a;
-    };
+    }
 
     function try_() {
         var body = block_(), bcatch = null, bfinally = null;
@@ -1192,7 +1192,7 @@ function parse($TEXT, options) {
             bcatch   : bcatch,
             bfinally : bfinally
         });
-    };
+    }
 
     function vardefs(no_in) {
         var a = [];
@@ -1208,7 +1208,7 @@ function parse($TEXT, options) {
             next();
         }
         return a;
-    };
+    }
 
     var var_ = function(no_in) {
         return new AST_Var({
@@ -1274,7 +1274,7 @@ function parse($TEXT, options) {
         }
         next();
         return ret;
-    };
+    }
 
     var expr_atom = function(allow_calls) {
         if (is("operator", "new")) {
@@ -1340,7 +1340,7 @@ function parse($TEXT, options) {
         }
         next();
         return a;
-    };
+    }
 
     var array_ = embed_tokens(function() {
         expect("[");
@@ -1417,14 +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;
@@ -1433,7 +1433,7 @@ function parse($TEXT, options) {
             start : S.token,
             end   : S.token
         });
-    };
+    }
 
     function strict_verify_symbol(sym) {
         if (sym.name == "arguments" || sym.name == "eval")
@@ -1451,7 +1451,7 @@ function parse($TEXT, options) {
         }
         next();
         return sym;
-    };
+    }
 
     function mark_pure(call) {
         var start = call.start;
@@ -1536,7 +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;
@@ -1558,7 +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;
@@ -1580,7 +1580,7 @@ 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;
@@ -1622,13 +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();
@@ -1644,6 +1644,5 @@ function parse($TEXT, options) {
             toplevel = new AST_Toplevel({ start: start, body: body, end: end });
         }
         return toplevel;
-    })();
-
-};
+    }();
+}

lib/propmangle.js

@@ -56,7 +56,7 @@ function find_builtins(reserved) {
     [ Object, Array, Function, Number,
       String, Boolean, Error, Math,
       Date, RegExp
-    ].forEach(function(ctor){
+    ].forEach(function(ctor) {
         Object.getOwnPropertyNames(ctor).map(add);
         if (ctor.prototype) {
             Object.getOwnPropertyNames(ctor.prototype).map(add);
@@ -136,7 +136,7 @@ function mangle_properties(ast, options) {
     var unmangleable = [];
 
     // step 1: find candidates to mangle
-    ast.walk(new TreeWalker(function(node){
+    ast.walk(new TreeWalker(function(node) {
         if (node instanceof AST_ObjectKeyVal) {
             add(node.key);
         }
@@ -157,7 +157,7 @@ function mangle_properties(ast, options) {
     }));
 
     // step 2: transform the tree, renaming properties
-    return ast.transform(new TreeTransformer(function(node){
+    return ast.transform(new TreeTransformer(function(node) {
         if (node instanceof AST_ObjectKeyVal) {
             node.key = mangle(node.key);
         }
@@ -234,7 +234,7 @@ function mangle_properties(ast, options) {
     }
 
     function mangleStrings(node) {
-        return node.transform(new TreeTransformer(function(node){
+        return node.transform(new TreeTransformer(function(node) {
             if (node instanceof AST_Sequence) {
                 var last = node.expressions.length - 1;
                 node.expressions[last] = mangleStrings(node.expressions[last]);

lib/scope.js

@@ -91,7 +91,7 @@ SymbolDef.prototype = {
     }
 };
 
-AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
+AST_Toplevel.DEFMETHOD("figure_out_scope", function(options) {
     options = defaults(options, {
         cache: null,
         ie8: false,
@@ -101,7 +101,7 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
     var self = this;
     var scope = self.parent_scope = null;
     var defun = null;
-    var tw = new TreeWalker(function(node, descend){
+    var tw = new TreeWalker(function(node, descend) {
         if (node instanceof AST_Catch) {
             var save_scope = scope;
             scope = new AST_Scope(node);
@@ -132,10 +132,7 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
             node.thedef = node;
             node.references = [];
         }
-        if (node instanceof AST_SymbolLambda) {
-            defun.def_function(node, node.name == "arguments" ? undefined : defun);
-        }
-        else if (node instanceof AST_SymbolDefun) {
+        if (node instanceof AST_SymbolDefun || options.ie8 && node instanceof AST_SymbolLambda) {
             // Careful here, the scope where this should be defined is
             // the parent scope.  The reason is that we enter a new
             // scope when we encounter the AST_Defun node (which is
@@ -143,6 +140,9 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
             // later.
             (node.scope = defun.parent_scope).def_function(node, defun);
         }
+        else if (node instanceof AST_SymbolLambda) {
+            defun.def_function(node, node.name == "arguments" ? undefined : defun);
+        }
         else if (node instanceof AST_SymbolVar) {
             defun.def_variable(node, node.TYPE == "SymbolVar" ? null : undefined);
             if (defun !== scope) {
@@ -162,7 +162,7 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
 
     // pass 2: find back references and eval
     self.globals = new Dictionary();
-    var tw = new TreeWalker(function(node, descend){
+    var tw = new TreeWalker(function(node, descend) {
         if (node instanceof AST_LoopControl && node.label) {
             node.label.thedef.references.push(node);
             return true;
@@ -217,7 +217,7 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
     }
 });
 
-AST_Toplevel.DEFMETHOD("def_global", function(node){
+AST_Toplevel.DEFMETHOD("def_global", function(node) {
     var globals = this.globals, name = node.name;
     if (globals.has(name)) {
         return globals.get(name);
@@ -230,7 +230,7 @@ AST_Toplevel.DEFMETHOD("def_global", function(node){
     }
 });
 
-AST_Scope.DEFMETHOD("init_scope_vars", function(parent_scope){
+AST_Scope.DEFMETHOD("init_scope_vars", function(parent_scope) {
     this.variables = new Dictionary();  // map name to AST_SymbolVar (variables defined in this scope; includes functions)
     this.functions = new Dictionary();  // map name to AST_SymbolDefun (functions defined in this scope)
     this.uses_with = false;             // will be set to true if this or some nested scope uses the `with` statement
@@ -240,7 +240,7 @@ AST_Scope.DEFMETHOD("init_scope_vars", function(parent_scope){
     this.cname = -1;                    // the current index for mangling functions/variables
 });
 
-AST_Lambda.DEFMETHOD("init_scope_vars", function(){
+AST_Lambda.DEFMETHOD("init_scope_vars", function() {
     AST_Scope.prototype.init_scope_vars.apply(this, arguments);
     this.uses_arguments = false;
     this.def_variable(new AST_SymbolFunarg({
@@ -270,20 +270,20 @@ AST_Symbol.DEFMETHOD("reference", function(options) {
     this.mark_enclosed(options);
 });
 
-AST_Scope.DEFMETHOD("find_variable", function(name){
+AST_Scope.DEFMETHOD("find_variable", function(name) {
     if (name instanceof AST_Symbol) name = name.name;
     return this.variables.get(name)
         || (this.parent_scope && this.parent_scope.find_variable(name));
 });
 
-AST_Scope.DEFMETHOD("def_function", function(symbol, init){
+AST_Scope.DEFMETHOD("def_function", function(symbol, init) {
     var def = this.def_variable(symbol, init);
     if (!def.init || def.init instanceof AST_Defun) def.init = init;
     this.functions.set(symbol.name, def);
     return def;
 });
 
-AST_Scope.DEFMETHOD("def_variable", function(symbol, init){
+AST_Scope.DEFMETHOD("def_variable", function(symbol, init) {
     var def = this.variables.get(symbol.name);
     if (def) {
         def.orig.push(symbol);
@@ -349,9 +349,6 @@ function next_mangled_name(scope, options, def) {
         holes.push(scope.cname);
     }
     scope.names_in_use[name] = true;
-    if (options.ie8 && def.orig[0] instanceof AST_SymbolLambda) {
-        names_in_use(scope.parent_scope, options)[name] = true;
-    }
     return name;
 }
 
@@ -390,7 +387,7 @@ function _default_mangler_options(options) {
     return options;
 }
 
-AST_Toplevel.DEFMETHOD("mangle_names", function(options){
+AST_Toplevel.DEFMETHOD("mangle_names", function(options) {
     options = _default_mangler_options(options);
 
     // We only need to mangle declaration nodes.  Special logic wired
@@ -407,7 +404,7 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
     }
 
     var redefined = [];
-    var tw = new TreeWalker(function(node, descend){
+    var tw = new TreeWalker(function(node, descend) {
         if (node instanceof AST_LabeledStatement) {
             // lname is incremented when we get to the AST_Label
             var save_nesting = lname;
@@ -520,7 +517,7 @@ AST_Sequence.DEFMETHOD("tail_node", function() {
     return this.expressions[this.expressions.length - 1];
 });
 
-AST_Toplevel.DEFMETHOD("compute_char_frequency", function(options){
+AST_Toplevel.DEFMETHOD("compute_char_frequency", function(options) {
     options = _default_mangler_options(options);
     base54.reset();
     try {

lib/sourcemap.js

@@ -46,16 +46,15 @@
 // a small wrapper around fitzgen's source-map library
 function SourceMap(options) {
     options = defaults(options, {
-        file : null,
-        root : null,
-        orig : null,
-
-        orig_line_diff : 0,
-        dest_line_diff : 0,
-    });
+        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
+        file: options.file,
+        sourceRoot: options.root
     });
     var maps = options.orig && Object.create(null);
     if (maps) for (var source in options.orig) {
@@ -68,30 +67,38 @@ function SourceMap(options) {
         }
         maps[source] = map;
     }
-
-    function add(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;
-            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 },
-            source    : source,
-            name      : name
-        });
-    };
     return {
-        add        : add,
-        get        : function() { return generator },
-        toString   : function() { return JSON.stringify(generator.toJSON()); }
+        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;
+                source = info.source;
+                orig_line = info.line;
+                orig_col = info.column;
+                name = info.name || name;
+            }
+            generator.addMapping({
+                name: name,
+                source: source,
+                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());
+        }
     };
-};
+}

lib/transform.js

@@ -43,8 +43,6 @@
 
 "use strict";
 
-// Tree transformer helpers.
-
 function TreeTransformer(before, after) {
     TreeWalker.call(this);
     this.before = before;
@@ -52,168 +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 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_Do, function(self, tw){
+    DEF(AST_Do, function(self, tw) {
         self.body = self.body.transform(tw);
         self.condition = self.condition.transform(tw);
     });
-
-    _(AST_While, function(self, 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

@@ -52,9 +52,7 @@ function member(name, array) {
 }
 
 function find_if(func, array) {
-    for (var i = 0, n = array.length; i < n; ++i) {
-        if (func(array[i])) return array[i];
-    }
+    for (var i = array.length; --i >= 0;) if (func(array[i])) return array[i];
 }
 
 function repeat_string(str, i) {
@@ -115,7 +113,7 @@ function return_true() { return true; }
 function return_this() { return this; }
 function return_null() { return null; }
 
-var MAP = (function(){
+var MAP = (function() {
     function MAP(a, f, backwards) {
         var ret = [], top = [], i;
         function doit() {
@@ -138,7 +136,7 @@ var MAP = (function(){
                 }
             }
             return is_last;
-        };
+        }
         if (Array.isArray(a)) {
             if (backwards) {
                 for (i = a.length; --i >= 0;) if (doit()) break;
@@ -152,14 +150,14 @@ 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;
 })();
 
@@ -169,7 +167,7 @@ function push_uniq(array, el) {
 }
 
 function string_template(text, props) {
-    return text.replace(/\{(.+?)\}/g, function(str, p){
+    return text.replace(/\{(.+?)\}/g, function(str, p) {
         return props && props[p];
     });
 }

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": "3.4.0",
+  "version": "3.4.2",
   "engines": {
     "node": ">=0.8.0"
   },

test/compress/arguments.js

@@ -5,7 +5,8 @@ replace_index: {
         properties: true,
     }
     input: {
-        console.log(arguments && arguments[0]);
+        var arguments = [];
+        console.log(arguments[0]);
         (function() {
             console.log(arguments[1], arguments["1"], arguments["foo"]);
         })("bar", 42);
@@ -21,7 +22,8 @@ replace_index: {
         })("bar", 42);
     }
     expect: {
-        console.log(arguments && arguments[0]);
+        var arguments = [];
+        console.log(arguments[0]);
         (function() {
             console.log(arguments[1], arguments[1], arguments.foo);
         })("bar", 42);
@@ -45,6 +47,37 @@ replace_index: {
     ]
 }
 
+replace_index_strict: {
+    options = {
+        arguments: true,
+        evaluate: true,
+        properties: true,
+        reduce_vars: true,
+    }
+    input: {
+        "use strict";
+        (function() {
+            console.log(arguments[1], arguments["1"], arguments["foo"]);
+        })("bar", 42);
+        (function(a, b) {
+            console.log(arguments[1], arguments["1"], arguments["foo"]);
+        })("bar", 42);
+    }
+    expect: {
+        "use strict";
+        (function() {
+            console.log(arguments[1], arguments[1], arguments.foo);
+        })("bar", 42);
+        (function(a, b) {
+            console.log(b, b, arguments.foo);
+        })("bar", 42);
+    }
+    expect_stdout: [
+        "42 42 undefined",
+        "42 42 undefined",
+    ]
+}
+
 replace_index_keep_fargs: {
     options = {
         arguments: true,
@@ -53,7 +86,8 @@ replace_index_keep_fargs: {
         properties: true,
     }
     input: {
-        console.log(arguments && arguments[0]);
+        var arguments = [];
+        console.log(arguments[0]);
         (function() {
             console.log(arguments[1], arguments["1"], arguments["foo"]);
         })("bar", 42);
@@ -69,7 +103,8 @@ replace_index_keep_fargs: {
         })("bar", 42);
     }
     expect: {
-        console.log(arguments && arguments[0]);
+        var arguments = [];
+        console.log(arguments[0]);
         (function(argument_0, argument_1) {
             console.log(argument_1, argument_1, arguments.foo);
         })("bar", 42);
@@ -93,6 +128,38 @@ replace_index_keep_fargs: {
     ]
 }
 
+replace_index_keep_fargs_strict: {
+    options = {
+        arguments: true,
+        evaluate: true,
+        keep_fargs: false,
+        properties: true,
+        reduce_vars: true,
+    }
+    input: {
+        "use strict";
+        (function() {
+            console.log(arguments[1], arguments["1"], arguments["foo"]);
+        })("bar", 42);
+        (function(a, b) {
+            console.log(arguments[1], arguments["1"], arguments["foo"]);
+        })("bar", 42);
+    }
+    expect: {
+        "use strict";
+        (function(argument_0, argument_1) {
+            console.log(argument_1, argument_1, arguments.foo);
+        })("bar", 42);
+        (function(a, b) {
+            console.log(b, b, arguments.foo);
+        })("bar", 42);
+    }
+    expect_stdout: [
+        "42 42 undefined",
+        "42 42 undefined",
+    ]
+}
+
 modified: {
     options = {
         arguments: true,
@@ -101,8 +168,10 @@ modified: {
         (function(a, b) {
             var c = arguments[0];
             var d = arguments[1];
-            a = "foo";
+            var a = "foo";
             b++;
+            arguments[0] = "moo";
+            arguments[1] *= 2;
             console.log(a, b, c, d, arguments[0], arguments[1]);
         })("bar", 42);
     }
@@ -110,10 +179,61 @@ modified: {
         (function(a, b) {
             var c = a;
             var d = b;
-            a = "foo";
+            var a = "foo";
             b++;
+            a = "moo";
+            b *= 2;
             console.log(a, b, c, d, a, b);
         })("bar", 42);
     }
-    expect_stdout: "foo 43 bar 42 foo 43"
+    expect_stdout: "moo 86 bar 42 moo 86"
+}
+
+modified_strict: {
+    options = {
+        arguments: true,
+        reduce_vars: true,
+    }
+    input: {
+        "use strict";
+        (function(a, b) {
+            var c = arguments[0];
+            var d = arguments[1];
+            var a = "foo";
+            b++;
+            arguments[0] = "moo";
+            arguments[1] *= 2;
+            console.log(a, b, c, d, arguments[0], arguments[1]);
+        })("bar", 42);
+    }
+    expect: {
+        "use strict";
+        (function(a, b) {
+            var c = arguments[0];
+            var d = arguments[1];
+            var a = "foo";
+            b++;
+            arguments[0] = "moo";
+            arguments[1] *= 2;
+            console.log(a, b, c, d, arguments[0], arguments[1]);
+        })("bar", 42);
+    }
+    expect_stdout: "foo 43 bar 42 moo 84"
+}
+
+duplicate_argname: {
+    options = {
+        arguments: true,
+    }
+    input: {
+        (function(a, b, a) {
+            console.log(a, b, arguments[0], arguments[1], arguments[2]);
+        })("foo", 42, "bar");
+    }
+    expect: {
+        (function(a, b, a) {
+            console.log(a, b, arguments[0], b, a);
+        })("foo", 42, "bar");
+    }
+    expect_stdout: "bar 42 foo 42 bar"
 }

test/compress/collapse_vars.js

@@ -150,36 +150,36 @@ collapse_vars_issue_721: {
         reduce_funcs: true, reduce_vars:true, passes:2
     }
     input: {
-        define(["require", "exports", 'handlebars'], function (require, exports, hb) {
+        define(["require", "exports", 'handlebars'], function(require, exports, hb) {
             var win = window;
             var _hb = win.Handlebars = hb;
             return _hb;
         });
-        def(function (hb) {
+        def(function(hb) {
             var win = window;
             var prop = 'Handlebars';
             var _hb = win[prop] = hb;
             return _hb;
         });
-        def(function (hb) {
+        def(function(hb) {
             var prop = 'Handlebars';
             var win = window;
             var _hb = win[prop] = hb;
             return _hb;
         });
-        def(function (hb) {
+        def(function(hb) {
             var prop = 'Handlebars';
             var win = g();
             var _hb = win[prop] = hb;
             return _hb;
         });
-        def(function (hb) {
+        def(function(hb) {
             var prop = g1();
             var win = g2();
             var _hb = win[prop] = hb;
             return _hb;
         });
-        def(function (hb) {
+        def(function(hb) {
             var win = g2();
             var prop = g1();
             var _hb = win[prop] = hb;
@@ -196,14 +196,14 @@ collapse_vars_issue_721: {
         def(function(hb) {
             return window.Handlebars = hb;
         }),
-        def(function (hb) {
+        def(function(hb) {
             return g().Handlebars = hb;
         }),
-        def(function (hb) {
+        def(function(hb) {
             var prop = g1();
             return g2()[prop] = hb;
         }),
-        def(function (hb) {
+        def(function(hb) {
             return g2()[g1()] = hb;
         });
     }
@@ -3150,7 +3150,7 @@ issue_2437_1: {
                 return result;
             } else {
                 var req = new XMLHttpRequest();
-                var detectFunc = function () {};
+                var detectFunc = function(){};
                 req.onreadystatechange = detectFunc;
                 var result = req[SYMBOL_FAKE_ONREADYSTATECHANGE_1] === detectFunc;
                 req.onreadystatechange = null;
@@ -3166,7 +3166,7 @@ issue_2437_1: {
                 return Object.defineProperty(XMLHttpRequest.prototype, "onreadystatechange", xhrDesc || {}),
                     result;
             }
-            var req, detectFunc = function() {};
+            var req, detectFunc = function(){};
             (req = new XMLHttpRequest()).onreadystatechange = detectFunc;
             result = req[SYMBOL_FAKE_ONREADYSTATECHANGE_1] === detectFunc;
             return req.onreadystatechange = null, result;
@@ -3200,7 +3200,7 @@ issue_2437_2: {
                 return result;
             } else {
                 var req = new XMLHttpRequest();
-                var detectFunc = function () {};
+                var detectFunc = function(){};
                 req.onreadystatechange = detectFunc;
                 var result = req[SYMBOL_FAKE_ONREADYSTATECHANGE_1] === detectFunc;
                 req.onreadystatechange = null;
@@ -4513,7 +4513,7 @@ issue_2878: {
     }
     input: {
         var c = 0;
-        (function (a, b) {
+        (function(a, b) {
             function f2() {
                 if (a) c++;
             }
@@ -4526,7 +4526,7 @@ issue_2878: {
     }
     expect: {
         var c = 0;
-        (function (a, b) {
+        (function(a, b) {
             function f2() {
                 if (a) c++;
             }

test/compress/drop-unused.js

@@ -1926,3 +1926,31 @@ issue_3146_4: {
     }
     expect_stdout: "PASS"
 }
+
+issue_3192: {
+    options = {
+        unused: true,
+    }
+    input: {
+        (function(a) {
+            console.log(a = "foo", arguments[0]);
+        })("bar");
+        (function(a) {
+            "use strict";
+            console.log(a = "foo", arguments[0]);
+        })("bar");
+    }
+    expect: {
+        (function(a) {
+            console.log(a = "foo", arguments[0]);
+        })("bar");
+        (function(a) {
+            "use strict";
+            console.log("foo", arguments[0]);
+        })("bar");
+    }
+    expect_stdout: [
+        "foo foo",
+        "foo bar",
+    ]
+}

test/compress/functions.js

@@ -1533,7 +1533,7 @@ issue_2663_3: {
         unused: true,
     }
     input: {
-        (function () {
+        (function() {
             var outputs = [
                 { type: 0, target: null, eventName: "ngSubmit", propName: null },
                 { type: 0, target: null, eventName: "submit", propName: null },
@@ -1550,11 +1550,11 @@ issue_2663_3: {
                 return handlers;
             }
             function renderEventHandlerClosure(eventName) {
-                return function () {
+                return function() {
                     return console.log(eventName);
                 };
             }
-            listenToElementOutputs(outputs).forEach(function (handler) {
+            listenToElementOutputs(outputs).forEach(function(handler) {
                 return handler()
             });
         })();
@@ -1634,7 +1634,7 @@ loop_init_arg: {
     }
     input: {
         var a = "PASS";
-        for (var k in "12") (function (b) {
+        for (var k in "12") (function(b) {
             (b >>= 1) && (a = "FAIL"), b = 2;
         })();
         console.log(a);

test/compress/ie8.js

@@ -420,8 +420,8 @@ issue_24_2: {
         })();
     }
     expect: {
-        (function(n) {
-            console.log(typeof function o(){} === typeof n ? "FAIL" : "PASS");
+        (function(o) {
+            console.log(typeof function n(){} === typeof o ? "FAIL" : "PASS");
         })();
     }
     expect_stdout: "PASS"
@@ -457,9 +457,29 @@ issue_2976_2: {
         }());
     }
     expect: {
-        console.log(function n() {
-            var o;
-            return o === n ? "FAIL" : "PASS";
+        console.log(function f() {
+            var n;
+            return n === f ? "FAIL" : "PASS";
+        }());
+    }
+    expect_stdout: "PASS"
+}
+
+issue_2976_3: {
+    mangle = {
+        ie8: true,
+        toplevel: true,
+    }
+    input: {
+        console.log(function f() {
+            var a;
+            return a === f ? "FAIL" : "PASS";
+        }());
+    }
+    expect: {
+        console.log(function o() {
+            var n;
+            return n === o ? "FAIL" : "PASS";
         }());
     }
     expect_stdout: "PASS"
@@ -538,3 +558,111 @@ issue_3035_ie8: {
     }
     expect_stdout: "PASS"
 }
+
+issue_3197_1: {
+    options = {
+        ie8: false,
+        inline: true,
+        reduce_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    mangle = {
+        ie8: false,
+    }
+    input: {
+        var window = {};
+        !function() {
+            function Foo() {
+                console.log(this instanceof Foo);
+            }
+            window.Foo = Foo;
+        }();
+        new window.Foo();
+    }
+    expect: {
+        var window = {};
+        window.Foo = function o() {
+            console.log(this instanceof o);
+        };
+        new window.Foo();
+    }
+    expect_stdout: "true"
+}
+
+issue_3197_1_ie8: {
+    options = {
+        ie8: true,
+        inline: true,
+        reduce_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    mangle = {
+        ie8: true,
+    }
+    input: {
+        var window = {};
+        !function() {
+            function Foo() {
+                console.log(this instanceof Foo);
+            }
+            window.Foo = Foo;
+        }();
+        new window.Foo();
+    }
+    expect: {
+        var window = {};
+        window.Foo = function Foo() {
+            console.log(this instanceof Foo);
+        };
+        new window.Foo();
+    }
+    expect_stdout: "true"
+}
+
+issue_3197_2: {
+    mangle = {
+        ie8: false,
+    }
+    input: {
+        (function(a) {
+            var f = function f() {
+                console.log(this instanceof f);
+            };
+            new f(a);
+        })();
+    }
+    expect: {
+        (function(n) {
+            var o = function n() {
+                console.log(this instanceof n);
+            };
+            new o(n);
+        })();
+    }
+    expect_stdout: "true"
+}
+
+issue_3197_2_ie8: {
+    mangle = {
+        ie8: true,
+    }
+    input: {
+        (function(a) {
+            var f = function f() {
+                console.log(this instanceof f);
+            };
+            new f(a);
+        })();
+    }
+    expect: {
+        (function(n) {
+            var o = function o() {
+                console.log(this instanceof o);
+            };
+            new o(n);
+        })();
+    }
+    expect_stdout: "true"
+}

test/compress/issue-281.js

@@ -399,7 +399,7 @@ wrap_iife_in_expression: {
         wrap_iife: true,
     }
     input: {
-        foo = (function () {
+        foo = (function() {
             return bar();
         })();
     }

test/compress/properties.js

@@ -1729,3 +1729,106 @@ issue_869_2: {
     }
     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/reduce_vars.js

@@ -4887,7 +4887,7 @@ inverted_var: {
         }(), function(c) {
             c = 4;
             return c;
-        }(), function (c) {
+        }(), function(c) {
             c = 5;
             return c;
             var c;

test/compress/wrap_iife.js

@@ -23,7 +23,7 @@ wrap_iife_in_expression: {
         wrap_iife: true,
     }
     input: {
-        foo = (function () {
+        foo = (function() {
             return bar();
         })();
     }

test/input/issue-1323/sample.js

@@ -1,4 +1,4 @@
-var bar = (function () {
+var bar = (function() {
     function foo (bar) {
         return bar;
     }

test/mocha/arguments.js

@@ -1,17 +1,14 @@
-var UglifyJS = require("../node");
 var assert = require("assert");
+var UglifyJS = require("../..");
 
 describe("arguments", function() {
     it("Should known that arguments in functions are local scoped", function() {
         var ast = UglifyJS.parse("var arguments; var f = function() {arguments.length}");
         ast.figure_out_scope();
-
         // Test scope of `var arguments`
         assert.strictEqual(ast.find_variable("arguments").global, true);
-
         // Select arguments symbol in function
         var symbol = ast.body[1].definitions[0].value.find_variable("arguments");
-
         assert.strictEqual(symbol.global, false);
         assert.strictEqual(symbol.scope, ast. // From ast
             body[1]. // Select 2nd statement (equals to `var f ...`)
@@ -27,4 +24,4 @@ describe("arguments", function() {
         assert.strictEqual(ast.body[0].body[0].uses_arguments, true);
         assert.strictEqual(ast.body[0].body[0].body[0].uses_arguments, false);
     });
-});
+});

test/mocha/cli.js

@@ -8,58 +8,46 @@ function read(path) {
 
 describe("bin/uglifyjs", function() {
     var uglifyjscmd = '"' + process.argv[0] + '" bin/uglifyjs';
-    it("should produce a functional build when using --self", function (done) {
+    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) {
+        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) {
+    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) {
+        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) {
+    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) {
+        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) {
+    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) {
+        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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.deepEqual(stderr.split(/\n/).slice(0, 2), [
                 "INFO: Using input source map: blah",
@@ -68,38 +56,35 @@ describe("bin/uglifyjs", function() {
             done();
         });
     });
-    it("Should append source map to output when using --source-map url=inline", function (done) {
+    it("Should append source map to output when using --source-map url=inline", function(done) {
         var command = uglifyjscmd + " test/input/issue-1323/sample.js --source-map url=inline";
-
-        exec(command, function (err, stdout) {
+        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) {
+    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) {
+        exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, "var bar=function(){function foo(bar){return bar}return foo}();\n");
             done();
         });
     });
-    it("should not consider source map file content as source map file name (issue #2082)", function (done) {
+    it("should not consider source map file content as source map file name (issue #2082)", function(done) {
         var command = [
             uglifyjscmd,
             "test/input/issue-2082/sample.js",
             "--source-map", "content=test/input/issue-2082/sample.js.map",
             "--source-map", "url=inline",
         ].join(" ");
-
-        exec(command, function (err, stdout, stderr) {
+        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");
             assert.notStrictEqual(stderrLines[1], 'INFO: Using input source map: {"version": 3,"sources": ["index.js"],"mappings": ";"}');
@@ -136,82 +121,66 @@ describe("bin/uglifyjs", function() {
             child.stdin.end(read("test/input/pr-3040/input.js"));
         }, 1000);
     });
-    it("Should work with --keep-fnames (mangle only)", function (done) {
+    it("Should work with --keep-fnames (mangle only)", function(done) {
         var command = uglifyjscmd + ' test/input/issue-1431/sample.js --keep-fnames -m';
-
-        exec(command, function (err, stdout) {
+        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) {
+    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) {
+        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) {
+    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) {
+        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) {
+    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) {
+        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) {
+    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) {
+        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) {
+    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) {
+        exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, "stdout.println(D);\n");
             done();
         });
     });
-    it("Should work with `--beautify`", function (done) {
+    it("Should work with `--beautify`", function(done) {
         var command = uglifyjscmd + ' test/input/issue-1482/input.js -b';
-
-        exec(command, function (err, stdout) {
+        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) {
+    it("Should work with `--beautify braces`", function(done) {
         var command = uglifyjscmd + ' test/input/issue-1482/input.js -b braces';
-
-        exec(command, function (err, stdout) {
+        exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, read("test/input/issue-1482/braces.js"));
             done();
         });
@@ -225,20 +194,16 @@ describe("bin/uglifyjs", function() {
             "--source-map", "includeSources=true",
             "--source-map", "url=inline",
         ].join(" ");
-
-        exec(command, function (err, stdout) {
+        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) {
+        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==",
@@ -256,10 +221,8 @@ describe("bin/uglifyjs", function() {
             "test/input/issue-1323/sample.js",
             "--source-map", "content=inline,url=inline",
         ].join(" ");
-
-        exec(command, function (err, stdout, stderr) {
+        exec(command, function(err, stdout, stderr) {
             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==",
@@ -272,8 +235,7 @@ describe("bin/uglifyjs", function() {
     });
     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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stderr, "ERROR: inline source map only works with built-in parser\n");
             done();
@@ -281,8 +243,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stderr, "ERROR: inline source map only works with built-in parser\n");
             done();
@@ -290,8 +251,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             var lines = stderr.split(/\n/);
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/simple.js:1,12");
@@ -303,8 +263,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             var lines = stderr.split(/\n/);
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/tab.js:1,12");
@@ -316,8 +275,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             var lines = stderr.split(/\n/);
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/eof.js:2,0");
@@ -329,8 +287,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             var lines = stderr.split(/\n/);
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/loop-no-body.js:2,0");
@@ -342,8 +299,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -357,8 +313,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -372,8 +327,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -387,8 +341,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -402,8 +355,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -417,8 +369,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -432,8 +383,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -447,8 +397,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -462,8 +411,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -477,8 +425,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -492,8 +439,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -507,8 +453,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -522,8 +467,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -537,8 +481,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -552,8 +495,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -567,8 +509,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -582,8 +523,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -597,8 +537,7 @@ 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) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
@@ -617,10 +556,8 @@ describe("bin/uglifyjs", function() {
             "--source-map",
             'content="' + read_map() + '",url=inline'
         ].join(" ");
-
-        exec(command, function (err, stdout) {
+        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",
@@ -642,10 +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==",
@@ -656,9 +591,8 @@ describe("bin/uglifyjs", function() {
     });
     it("Should dump AST as JSON", function(done) {
         var command = uglifyjscmd + " test/input/global_defs/simple.js -mco ast";
-        exec(command, function (err, stdout) {
+        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));
@@ -667,7 +601,7 @@ describe("bin/uglifyjs", function() {
     });
     it("Should print supported options on invalid option syntax", function(done) {
         var command = uglifyjscmd + " test/input/comments/filter.js -b ascii-only";
-        exec(command, function (err, stdout, stderr) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.ok(/^Supported options:\n[\s\S]*?\nERROR: `ascii-only` is not a supported option/.test(stderr), stderr);
@@ -676,27 +610,23 @@ 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) {
+        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) {
+        exec(command, function(err, stdout) {
             if (err) throw err;
-
             assert.strictEqual(stdout, 'function test(a){"aaaaaaaaaaaaaaaa";a(err,data);a(err,data)}\n');
             done();
         });
     });
     it("Should fail with --mangle-props reserved=[in]", function(done) {
         var command = uglifyjscmd + " test/input/issue-505/input.js --mangle-props reserved=[in]";
-        exec(command, function (err, stdout, stderr) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.ok(/^Supported options:\n[\s\S]*?\nERROR: `reserved=\[in]` is not a supported option/.test(stderr), stderr);
@@ -705,7 +635,7 @@ describe("bin/uglifyjs", function() {
     });
     it("Should fail with --define a-b", function(done) {
         var command = uglifyjscmd + " test/input/issue-505/input.js --define a-b";
-        exec(command, function (err, stdout, stderr) {
+        exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
             assert.strictEqual(stderr, "Error parsing arguments for 'define': a-b\n");

test/mocha/comment-filter.js

@@ -1,89 +0,0 @@
-var UglifyJS = require("../node");
-var assert = require("assert");
-
-describe("comment filters", function() {
-    it("Should be able to filter comments by passing regexp", function() {
-        var ast = UglifyJS.parse("/*!test1*/\n/*test2*/\n//!test3\n//test4\n<!--test5\n<!--!test6\n-->test7\n-->!test8");
-        assert.strictEqual(ast.print_to_string({comments: /^!/}), "/*!test1*/\n//!test3\n//!test6\n//!test8\n");
-    });
-
-    it("Should be able to filter comments with the 'all' option", function() {
-        var ast = UglifyJS.parse("/*!test1*/\n/*test2*/\n//!test3\n//test4\n<!--test5\n<!--!test6\n-->test7\n-->!test8");
-        assert.strictEqual(ast.print_to_string({comments: "all"}), "/*!test1*/\n/*test2*/\n//!test3\n//test4\n//test5\n//!test6\n//test7\n//!test8\n");
-    });
-
-    it("Should be able to filter commments with the 'some' option", function() {
-        var ast = UglifyJS.parse("// foo\n/*@preserve*/\n// bar\n/*@license*/\n//@license with the wrong comment type\n/*@cc_on something*/");
-        assert.strictEqual(ast.print_to_string({comments: "some"}), "/*@preserve*/\n/*@license*/\n/*@cc_on something*/");
-    });
-
-    it("Should be able to filter comments by passing a function", function() {
-        var ast = UglifyJS.parse("/*TEST 123*/\n//An other comment\n//8 chars.");
-        var f = function(node, comment) {
-            return comment.value.length === 8;
-        };
-
-        assert.strictEqual(ast.print_to_string({comments: f}), "/*TEST 123*/\n//8 chars.\n");
-    });
-
-    it("Should be able to filter comments by passing regex in string format", function() {
-        var ast = UglifyJS.parse("/*!test1*/\n/*test2*/\n//!test3\n//test4\n<!--test5\n<!--!test6\n-->test7\n-->!test8");
-        assert.strictEqual(ast.print_to_string({comments: "/^!/"}), "/*!test1*/\n//!test3\n//!test6\n//!test8\n");
-    });
-
-    it("Should be able to get the comment and comment type when using a function", function() {
-        var ast = UglifyJS.parse("/*!test1*/\n/*test2*/\n//!test3\n//test4\n<!--test5\n<!--!test6\n-->test7\n-->!test8");
-        var f = function(node, comment) {
-            return comment.type == "comment1" || comment.type == "comment3";
-        };
-
-        assert.strictEqual(ast.print_to_string({comments: f}), "//!test3\n//test4\n//test5\n//!test6\n");
-    });
-
-    it("Should be able to filter comments by passing a boolean", function() {
-        var ast = UglifyJS.parse("/*!test1*/\n/*test2*/\n//!test3\n//test4\n<!--test5\n<!--!test6\n-->test7\n-->!test8");
-
-        assert.strictEqual(ast.print_to_string({comments: true}), "/*!test1*/\n/*test2*/\n//!test3\n//test4\n//test5\n//!test6\n//test7\n//!test8\n");
-        assert.strictEqual(ast.print_to_string({comments: false}), "");
-    });
-
-    it("Should never be able to filter comment5 (shebangs)", function() {
-        var ast = UglifyJS.parse("#!Random comment\n//test1\n/*test2*/");
-        var f = function(node, comment) {
-            assert.strictEqual(comment.type === "comment5", false);
-
-            return true;
-        };
-
-        assert.strictEqual(ast.print_to_string({comments: f}), "#!Random comment\n//test1\n/*test2*/");
-    });
-
-    it("Should never be able to filter comment5 when using 'some' as filter", function() {
-        var ast = UglifyJS.parse("#!foo\n//foo\n/*@preserve*/\n/* please hide me */");
-        assert.strictEqual(ast.print_to_string({comments: "some"}), "#!foo\n/*@preserve*/");
-    });
-
-    it("Should have no problem on multiple calls", function() {
-        const options = {
-            comments: /ok/
-        };
-
-        assert.strictEqual(UglifyJS.parse("/* ok */ function a(){}").print_to_string(options), "/* ok */function a(){}");
-        assert.strictEqual(UglifyJS.parse("/* ok */ function a(){}").print_to_string(options), "/* ok */function a(){}");
-        assert.strictEqual(UglifyJS.parse("/* ok */ function a(){}").print_to_string(options), "/* ok */function a(){}");
-    });
-
-    it("Should handle shebang and preamble correctly", function() {
-        var code = UglifyJS.minify("#!/usr/bin/node\nvar x = 10;", {
-            output: { preamble: "/* Build */" }
-        }).code;
-        assert.strictEqual(code, "#!/usr/bin/node\n/* Build */\nvar x=10;");
-    });
-
-    it("Should handle preamble without shebang correctly", function() {
-        var code = UglifyJS.minify("var x = 10;", {
-            output: { preamble: "/* Build */" }
-        }).code;
-        assert.strictEqual(code, "/* Build */\nvar x=10;");
-    });
-});

test/mocha/comment.js

@@ -1,262 +0,0 @@
-var assert = require("assert");
-var uglify = require("../node");
-
-describe("Comment", function() {
-    it("Should recognize eol of single line comments", function() {
-        var tests = [
-            "//Some comment 1\n>",
-            "//Some comment 2\r>",
-            "//Some comment 3\r\n>",
-            "//Some comment 4\u2028>",
-            "//Some comment 5\u2029>"
-        ];
-
-        var fail = function(e) {
-            return e instanceof uglify.JS_Parse_Error &&
-                e.message === "Unexpected token: operator (>)" &&
-                e.line === 2 &&
-                e.col === 0;
-        }
-
-        for (var i = 0; i < tests.length; i++) {
-            assert.throws(function() {
-                uglify.parse(tests[i]);
-            }, fail, tests[i]);
-        }
-    });
-
-    it("Should update the position of a multiline comment correctly", function() {
-        var tests = [
-            "/*Some comment 1\n\n\n*/\n>\n\n\n\n\n\n",
-            "/*Some comment 2\r\n\r\n\r\n*/\r\n>\n\n\n\n\n\n",
-            "/*Some comment 3\r\r\r*/\r>\n\n\n\n\n\n",
-            "/*Some comment 4\u2028\u2028\u2028*/\u2028>\n\n\n\n\n\n",
-            "/*Some comment 5\u2029\u2029\u2029*/\u2029>\n\n\n\n\n\n"
-        ];
-
-        var fail = function(e) {
-            return e instanceof uglify.JS_Parse_Error &&
-                e.message === "Unexpected token: operator (>)" &&
-                e.line === 5 &&
-                e.col === 0;
-        }
-
-        for (var i = 0; i < tests.length; i++) {
-            assert.throws(function() {
-                uglify.parse(tests[i]);
-            }, fail, tests[i]);
-        }
-    });
-
-    it("Should handle comment within return correctly", function() {
-        var result = uglify.minify([
-            "function unequal(x, y) {",
-            "    return (",
-            "        // Either one",
-            "        x < y",
-            "        ||",
-            "        y < x",
-            "    );",
-            "}",
-        ].join("\n"), {
-            compress: false,
-            mangle: false,
-            output: {
-                beautify: true,
-                comments: "all",
-            },
-        });
-        if (result.error) throw result.error;
-        assert.strictEqual(result.code, [
-            "function unequal(x, y) {",
-            "    // Either one",
-            "    return x < y || y < x;",
-            "}",
-        ].join("\n"));
-    });
-
-    it("Should handle comment folded into return correctly", function() {
-        var result = uglify.minify([
-            "function f() {",
-            "    /* boo */ x();",
-            "    return y();",
-            "}",
-        ].join("\n"), {
-            mangle: false,
-            output: {
-                beautify: true,
-                comments: "all",
-            },
-        });
-        if (result.error) throw result.error;
-        assert.strictEqual(result.code, [
-            "function f() {",
-            "    /* boo */",
-            "    return x(), y();",
-            "}",
-        ].join("\n"));
-    });
-
-    it("Should not drop comments after first OutputStream", function() {
-        var code = "/* boo */\nx();";
-        var ast = uglify.parse(code);
-        var out1 = uglify.OutputStream({
-            beautify: true,
-            comments: "all",
-        });
-        ast.print(out1);
-        var out2 = uglify.OutputStream({
-            beautify: true,
-            comments: "all",
-        });
-        ast.print(out2);
-        assert.strictEqual(out1.get(), code);
-        assert.strictEqual(out2.get(), out1.get());
-    });
-
-    it("Should retain trailing comments", function() {
-        var code = [
-            "if (foo /* lost comment */ && bar /* lost comment */) {",
-            "    // this one is kept",
-            "    {/* lost comment */}",
-            "    !function() {",
-            "        // lost comment",
-            "    }();",
-            "    function baz() {/* lost comment */}",
-            "    // lost comment",
-            "}",
-            "// comments right before EOF are lost as well",
-        ].join("\n");
-        var result = uglify.minify(code, {
-            compress: false,
-            mangle: false,
-            output: {
-                beautify: true,
-                comments: "all",
-            },
-        });
-        if (result.error) throw result.error;
-        assert.strictEqual(result.code, code);
-    });
-
-    it("Should retain comments within braces", function() {
-        var code = [
-            "{/* foo */}",
-            "a({/* foo */});",
-            "while (a) {/* foo */}",
-            "switch (a) {/* foo */}",
-            "if (a) {/* foo */} else {/* bar */}",
-        ].join("\n\n");
-        var result = uglify.minify(code, {
-            compress: false,
-            mangle: false,
-            output: {
-                beautify: true,
-                comments: "all",
-            },
-        });
-        if (result.error) throw result.error;
-        assert.strictEqual(result.code, code);
-    });
-
-    it("Should correctly preserve new lines around comments", function() {
-        var tests = [
-            [
-                "// foo",
-                "// bar",
-                "x();",
-            ].join("\n"),
-            [
-                "// foo",
-                "/* bar */",
-                "x();",
-            ].join("\n"),
-            [
-                "// foo",
-                "/* bar */ x();",
-            ].join("\n"),
-            [
-                "/* foo */",
-                "// bar",
-                "x();",
-            ].join("\n"),
-            [
-                "/* foo */ // bar",
-                "x();",
-            ].join("\n"),
-            [
-                "/* foo */",
-                "/* bar */",
-                "x();",
-            ].join("\n"),
-            [
-                "/* foo */",
-                "/* bar */ x();",
-            ].join("\n"),
-            [
-                "/* foo */ /* bar */",
-                "x();",
-            ].join("\n"),
-            "/* foo */ /* bar */ x();",
-        ].forEach(function(code) {
-            var result = uglify.minify(code, {
-                compress: false,
-                mangle: false,
-                output: {
-                    beautify: true,
-                    comments: "all",
-                },
-            });
-            if (result.error) throw result.error;
-            assert.strictEqual(result.code, code);
-        });
-    });
-
-    it("Should preserve new line before comment without beautify", function() {
-        var code = [
-            "function f(){",
-            "/* foo */bar()}",
-        ].join("\n");
-        var result = uglify.minify(code, {
-            compress: false,
-            mangle: false,
-            output: {
-                comments: "all",
-            },
-        });
-        if (result.error) throw result.error;
-        assert.strictEqual(result.code, code);
-    });
-
-    it("Should preserve comments around IIFE", function() {
-        var result = uglify.minify("/*a*/(/*b*/function(){/*c*/}/*d*/)/*e*/();", {
-            compress: false,
-            mangle: false,
-            output: {
-                comments: "all",
-            },
-        });
-        if (result.error) throw result.error;
-        assert.strictEqual(result.code, "/*a*/ /*b*/(function(){/*c*/}/*d*/ /*e*/)();");
-    });
-
-    it("Should output line comments after statements", function() {
-        var result = uglify.minify([
-            "x()//foo",
-            "{y()//bar",
-            "}",
-        ].join("\n"), {
-            compress: false,
-            mangle: false,
-            output: {
-                comments: "all",
-            },
-        });
-        if (result.error) throw result.error;
-        assert.strictEqual(result.code, [
-            "x();//foo",
-            "{y();//bar",
-            "}",
-        ].join("\n"));
-    });
-});

test/mocha/comment_before_constant.js

@@ -1,22 +0,0 @@
-var Uglify = require('../../');
-var assert = require("assert");
-
-describe("comment before constant", function() {
-    var js = 'function f() { /*c1*/ var /*c2*/ foo = /*c3*/ false; return foo; }';
-
-    it("Should test comment before constant is retained and output after mangle.", function() {
-        var result = Uglify.minify(js, {
-            compress: { collapse_vars: false, reduce_vars: false },
-            output: { comments: true },
-        });
-        assert.strictEqual(result.code, 'function f(){/*c1*/var/*c2*/n=/*c3*/!1;return n}');
-    });
-
-    it("Should test code works when comments disabled.", function() {
-        var result = Uglify.minify(js, {
-            compress: { collapse_vars: false, reduce_vars: false },
-            output: { comments: false },
-        });
-        assert.strictEqual(result.code, 'function f(){var n=!1;return n}');
-    });
-});

test/mocha/comments.js

@@ -0,0 +1,380 @@
+var assert = require("assert");
+var UglifyJS = require("../node");
+
+describe("comments", function() {
+    it("Should recognize eol of single line comments", function() {
+        var tests = [
+            "//Some comment 1\n>",
+            "//Some comment 2\r>",
+            "//Some comment 3\r\n>",
+            "//Some comment 4\u2028>",
+            "//Some comment 5\u2029>"
+        ];
+
+        var fail = function(e) {
+            return e instanceof UglifyJS.JS_Parse_Error
+                && e.message === "Unexpected token: operator (>)"
+                && e.line === 2
+                && e.col === 0;
+        }
+
+        for (var i = 0; i < tests.length; i++) {
+            assert.throws(function() {
+                UglifyJS.parse(tests[i]);
+            }, fail, tests[i]);
+        }
+    });
+
+    it("Should update the position of a multiline comment correctly", function() {
+        var tests = [
+            "/*Some comment 1\n\n\n*/\n>\n\n\n\n\n\n",
+            "/*Some comment 2\r\n\r\n\r\n*/\r\n>\n\n\n\n\n\n",
+            "/*Some comment 3\r\r\r*/\r>\n\n\n\n\n\n",
+            "/*Some comment 4\u2028\u2028\u2028*/\u2028>\n\n\n\n\n\n",
+            "/*Some comment 5\u2029\u2029\u2029*/\u2029>\n\n\n\n\n\n"
+        ];
+
+        var fail = function(e) {
+            return e instanceof UglifyJS.JS_Parse_Error
+                && e.message === "Unexpected token: operator (>)"
+                && e.line === 5
+                && e.col === 0;
+        }
+
+        for (var i = 0; i < tests.length; i++) {
+            assert.throws(function() {
+                UglifyJS.parse(tests[i]);
+            }, fail, tests[i]);
+        }
+    });
+
+    it("Should handle comment within return correctly", function() {
+        var result = UglifyJS.minify([
+            "function unequal(x, y) {",
+            "    return (",
+            "        // Either one",
+            "        x < y",
+            "        ||",
+            "        y < x",
+            "    );",
+            "}",
+        ].join("\n"), {
+            compress: false,
+            mangle: false,
+            output: {
+                beautify: true,
+                comments: "all",
+            },
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, [
+            "function unequal(x, y) {",
+            "    // Either one",
+            "    return x < y || y < x;",
+            "}",
+        ].join("\n"));
+    });
+
+    it("Should handle comment folded into return correctly", function() {
+        var result = UglifyJS.minify([
+            "function f() {",
+            "    /* boo */ x();",
+            "    return y();",
+            "}",
+        ].join("\n"), {
+            mangle: false,
+            output: {
+                beautify: true,
+                comments: "all",
+            },
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, [
+            "function f() {",
+            "    /* boo */",
+            "    return x(), y();",
+            "}",
+        ].join("\n"));
+    });
+
+    it("Should not drop comments after first OutputStream", function() {
+        var code = "/* boo */\nx();";
+        var ast = UglifyJS.parse(code);
+        var out1 = UglifyJS.OutputStream({
+            beautify: true,
+            comments: "all",
+        });
+        ast.print(out1);
+        var out2 = UglifyJS.OutputStream({
+            beautify: true,
+            comments: "all",
+        });
+        ast.print(out2);
+        assert.strictEqual(out1.get(), code);
+        assert.strictEqual(out2.get(), out1.get());
+    });
+
+    it("Should retain trailing comments", function() {
+        var code = [
+            "if (foo /* lost comment */ && bar /* lost comment */) {",
+            "    // this one is kept",
+            "    {/* lost comment */}",
+            "    !function() {",
+            "        // lost comment",
+            "    }();",
+            "    function baz() {/* lost comment */}",
+            "    // lost comment",
+            "}",
+            "// comments right before EOF are lost as well",
+        ].join("\n");
+        var result = UglifyJS.minify(code, {
+            compress: false,
+            mangle: false,
+            output: {
+                beautify: true,
+                comments: "all",
+            },
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, code);
+    });
+
+    it("Should retain comments within braces", function() {
+        var code = [
+            "{/* foo */}",
+            "a({/* foo */});",
+            "while (a) {/* foo */}",
+            "switch (a) {/* foo */}",
+            "if (a) {/* foo */} else {/* bar */}",
+        ].join("\n\n");
+        var result = UglifyJS.minify(code, {
+            compress: false,
+            mangle: false,
+            output: {
+                beautify: true,
+                comments: "all",
+            },
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, code);
+    });
+
+    it("Should correctly preserve new lines around comments", function() {
+        var tests = [
+            [
+                "// foo",
+                "// bar",
+                "x();",
+            ].join("\n"),
+            [
+                "// foo",
+                "/* bar */",
+                "x();",
+            ].join("\n"),
+            [
+                "// foo",
+                "/* bar */ x();",
+            ].join("\n"),
+            [
+                "/* foo */",
+                "// bar",
+                "x();",
+            ].join("\n"),
+            [
+                "/* foo */ // bar",
+                "x();",
+            ].join("\n"),
+            [
+                "/* foo */",
+                "/* bar */",
+                "x();",
+            ].join("\n"),
+            [
+                "/* foo */",
+                "/* bar */ x();",
+            ].join("\n"),
+            [
+                "/* foo */ /* bar */",
+                "x();",
+            ].join("\n"),
+            "/* foo */ /* bar */ x();",
+        ].forEach(function(code) {
+            var result = UglifyJS.minify(code, {
+                compress: false,
+                mangle: false,
+                output: {
+                    beautify: true,
+                    comments: "all",
+                },
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code, code);
+        });
+    });
+
+    it("Should preserve new line before comment without beautify", function() {
+        var code = [
+            "function f(){",
+            "/* foo */bar()}",
+        ].join("\n");
+        var result = UglifyJS.minify(code, {
+            compress: false,
+            mangle: false,
+            output: {
+                comments: "all",
+            },
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, code);
+    });
+
+    it("Should preserve comments around IIFE", function() {
+        var result = UglifyJS.minify("/*a*/(/*b*/function(){/*c*/}/*d*/)/*e*/();", {
+            compress: false,
+            mangle: false,
+            output: {
+                comments: "all",
+            },
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, "/*a*/ /*b*/(function(){/*c*/}/*d*/ /*e*/)();");
+    });
+
+    it("Should output line comments after statements", function() {
+        var result = UglifyJS.minify([
+            "x()//foo",
+            "{y()//bar",
+            "}",
+        ].join("\n"), {
+            compress: false,
+            mangle: false,
+            output: {
+                comments: "all",
+            },
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, [
+            "x();//foo",
+            "{y();//bar",
+            "}",
+        ].join("\n"));
+    });
+
+    describe("comment before constant", function() {
+        var js = 'function f() { /*c1*/ var /*c2*/ foo = /*c3*/ false; return foo; }';
+
+        it("Should test comment before constant is retained and output after mangle.", function() {
+            var result = UglifyJS.minify(js, {
+                compress: { collapse_vars: false, reduce_vars: false },
+                output: { comments: true },
+            });
+            assert.strictEqual(result.code, 'function f(){/*c1*/var/*c2*/n=/*c3*/!1;return n}');
+        });
+
+        it("Should test code works when comments disabled.", function() {
+            var result = UglifyJS.minify(js, {
+                compress: { collapse_vars: false, reduce_vars: false },
+                output: { comments: false },
+            });
+            assert.strictEqual(result.code, 'function f(){var n=!1;return n}');
+        });
+    });
+
+    describe("comment filters", function() {
+        it("Should be able to filter comments by passing regexp", function() {
+            var ast = UglifyJS.parse("/*!test1*/\n/*test2*/\n//!test3\n//test4\n<!--test5\n<!--!test6\n-->test7\n-->!test8");
+            assert.strictEqual(ast.print_to_string({comments: /^!/}), "/*!test1*/\n//!test3\n//!test6\n//!test8\n");
+        });
+
+        it("Should be able to filter comments with the 'all' option", function() {
+            var ast = UglifyJS.parse("/*!test1*/\n/*test2*/\n//!test3\n//test4\n<!--test5\n<!--!test6\n-->test7\n-->!test8");
+            assert.strictEqual(ast.print_to_string({comments: "all"}), "/*!test1*/\n/*test2*/\n//!test3\n//test4\n//test5\n//!test6\n//test7\n//!test8\n");
+        });
+
+        it("Should be able to filter commments with the 'some' option", function() {
+            var ast = UglifyJS.parse("// foo\n/*@preserve*/\n// bar\n/*@license*/\n//@license with the wrong comment type\n/*@cc_on something*/");
+            assert.strictEqual(ast.print_to_string({comments: "some"}), "/*@preserve*/\n/*@license*/\n/*@cc_on something*/");
+        });
+
+        it("Should be able to filter comments by passing a function", function() {
+            var ast = UglifyJS.parse("/*TEST 123*/\n//An other comment\n//8 chars.");
+            var f = function(node, comment) {
+                return comment.value.length === 8;
+            };
+
+            assert.strictEqual(ast.print_to_string({comments: f}), "/*TEST 123*/\n//8 chars.\n");
+        });
+
+        it("Should be able to filter comments by passing regex in string format", function() {
+            var ast = UglifyJS.parse("/*!test1*/\n/*test2*/\n//!test3\n//test4\n<!--test5\n<!--!test6\n-->test7\n-->!test8");
+            assert.strictEqual(ast.print_to_string({comments: "/^!/"}), "/*!test1*/\n//!test3\n//!test6\n//!test8\n");
+        });
+
+        it("Should be able to get the comment and comment type when using a function", function() {
+            var ast = UglifyJS.parse("/*!test1*/\n/*test2*/\n//!test3\n//test4\n<!--test5\n<!--!test6\n-->test7\n-->!test8");
+            var f = function(node, comment) {
+                return comment.type == "comment1" || comment.type == "comment3";
+            };
+
+            assert.strictEqual(ast.print_to_string({comments: f}), "//!test3\n//test4\n//test5\n//!test6\n");
+        });
+
+        it("Should be able to filter comments by passing a boolean", function() {
+            var ast = UglifyJS.parse("/*!test1*/\n/*test2*/\n//!test3\n//test4\n<!--test5\n<!--!test6\n-->test7\n-->!test8");
+
+            assert.strictEqual(ast.print_to_string({comments: true}), "/*!test1*/\n/*test2*/\n//!test3\n//test4\n//test5\n//!test6\n//test7\n//!test8\n");
+            assert.strictEqual(ast.print_to_string({comments: false}), "");
+        });
+
+        it("Should never be able to filter comment5 (shebangs)", function() {
+            var ast = UglifyJS.parse("#!Random comment\n//test1\n/*test2*/");
+            var f = function(node, comment) {
+                assert.strictEqual(comment.type === "comment5", false);
+
+                return true;
+            };
+
+            assert.strictEqual(ast.print_to_string({comments: f}), "#!Random comment\n//test1\n/*test2*/");
+        });
+
+        it("Should never be able to filter comment5 when using 'some' as filter", function() {
+            var ast = UglifyJS.parse("#!foo\n//foo\n/*@preserve*/\n/* please hide me */");
+            assert.strictEqual(ast.print_to_string({comments: "some"}), "#!foo\n/*@preserve*/");
+        });
+
+        it("Should have no problem on multiple calls", function() {
+            const options = {
+                comments: /ok/
+            };
+
+            assert.strictEqual(UglifyJS.parse("/* ok */ function a(){}").print_to_string(options), "/* ok */function a(){}");
+            assert.strictEqual(UglifyJS.parse("/* ok */ function a(){}").print_to_string(options), "/* ok */function a(){}");
+            assert.strictEqual(UglifyJS.parse("/* ok */ function a(){}").print_to_string(options), "/* ok */function a(){}");
+        });
+
+        it("Should handle shebang and preamble correctly", function() {
+            var code = UglifyJS.minify("#!/usr/bin/node\nvar x = 10;", {
+                output: { preamble: "/* Build */" }
+            }).code;
+            assert.strictEqual(code, "#!/usr/bin/node\n/* Build */\nvar x=10;");
+        });
+
+        it("Should handle preamble without shebang correctly", function() {
+            var code = UglifyJS.minify("var x = 10;", {
+                output: { preamble: "/* Build */" }
+            }).code;
+            assert.strictEqual(code, "/* Build */\nvar x=10;");
+        });
+    });
+
+    describe("Huge number of comments.", function() {
+        it("Should parse and compress code with thousands of consecutive comments", function() {
+            var js = "function lots_of_comments(x) { return 7 -";
+            for (var i = 1; i <= 5000; ++i) js += "// " + i + "\n";
+            for (; i <= 10000; ++i) js += "/* " + i + " */ /**/";
+            js += "x; }";
+            var result = UglifyJS.minify(js, { mangle: false });
+            assert.strictEqual(result.code, "function lots_of_comments(x){return 7-x}");
+        });
+    });
+});

test/mocha/directives.js

@@ -1,9 +1,9 @@
 var assert = require("assert");
-var uglify = require("../node");
+var UglifyJS = require("../node");
 
 describe("Directives", function() {
     it ("Should allow tokenizer to store directives state", function() {
-        var tokenizer = uglify.tokenizer("", "foo.js");
+        var tokenizer = UglifyJS.tokenizer("", "foo.js");
 
         // Stack level 0
         assert.strictEqual(tokenizer.has_directive("use strict"), false);
@@ -161,13 +161,13 @@ describe("Directives", function() {
 
         for (var i = 0; i < tests.length; i++) {
             // Fail parser deliberately to get state at failure
-            var tokenizer = uglify.tokenizer(tests[i].input + "]", "foo.js");
+            var tokenizer = UglifyJS.tokenizer(tests[i].input + "]", "foo.js");
 
             try {
-                var parser = uglify.parse(tokenizer);
+                var parser = UglifyJS.parse(tokenizer);
                 throw new Error("Expected parser to fail");
             } catch (e) {
-                assert.strictEqual(e instanceof uglify.JS_Parse_Error, true);
+                assert.strictEqual(e instanceof UglifyJS.JS_Parse_Error, true);
                 assert.strictEqual(e.message, "Unexpected token: punc (])");
             }
 
@@ -186,7 +186,7 @@ describe("Directives", function() {
             ["'tests';\n\n", true],
             ["\n\n\"use strict\";\n\n", true]
         ].forEach(function(test) {
-            var out = uglify.OutputStream();
+            var out = UglifyJS.OutputStream();
             out.print(test[0]);
             out.print_string("", null, true);
             assert.strictEqual(out.get() === test[0] + ';""', test[1], test[0]);
@@ -195,7 +195,7 @@ describe("Directives", function() {
 
     it("Should only print 2 semicolons spread over 2 lines in beautify mode", function() {
         assert.strictEqual(
-            uglify.minify(
+            UglifyJS.minify(
                 '"use strict";\'use strict\';"use strict";"use strict";;\'use strict\';console.log(\'use strict\');',
                 {output: {beautify: true, quote_style: 3}, compress: false}
             ).code,
@@ -225,7 +225,7 @@ describe("Directives", function() {
 
         for (var i = 0; i < tests.length; i++) {
             assert.strictEqual(
-                uglify.minify(tests[i][0], {compress: false, mangle: false}).code,
+                UglifyJS.minify(tests[i][0], {compress: false, mangle: false}).code,
                 tests[i][1],
                 tests[i][0]
             );
@@ -233,7 +233,7 @@ describe("Directives", function() {
     });
 
     it("Should add double semicolon when relying on automatic semicolon insertion", function() {
-        var code = uglify.minify('"use strict";"use\\x20strict";',
+        var code = UglifyJS.minify('"use strict";"use\\x20strict";',
             {output: {semicolons: false}, compress: false}
         ).code;
         assert.strictEqual(code, '"use strict";;"use strict"\n');
@@ -340,7 +340,7 @@ describe("Directives", function() {
         ];
         for (var i = 0; i < tests.length; i++) {
             assert.strictEqual(
-                uglify.minify(tests[i][0], {output:{quote_style: tests[i][1]}, compress: false}).code,
+                UglifyJS.minify(tests[i][0], {output:{quote_style: tests[i][1]}, compress: false}).code,
                 tests[i][2],
                 tests[i][0] + " using mode " + tests[i][1]
             );
@@ -372,7 +372,7 @@ describe("Directives", function() {
 
         for (var i = 0; i < tests.length; i++) {
             assert.strictEqual(
-                uglify.minify(tests[i][0]).code,
+                UglifyJS.minify(tests[i][0]).code,
                 tests[i][1],
                 tests[i][0]
             );

test/mocha/getter-setter.js

@@ -1,5 +1,5 @@
-var UglifyJS = require("../node");
 var assert = require("assert");
+var UglifyJS = require("../node");
 
 describe("Getters and setters", function() {
     it("Should not accept operator symbols as getter/setter name", function() {
@@ -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 function(e) {
+                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/huge-number-of-comments.js

@@ -1,14 +0,0 @@
-var Uglify = require('../../');
-var assert = require("assert");
-
-describe("Huge number of comments.", function() {
-    it("Should parse and compress code with thousands of consecutive comments", function() {
-        var js = 'function lots_of_comments(x) { return 7 -';
-        var i;
-        for (i = 1; i <= 5000; ++i) { js += "// " + i + "\n"; }
-        for (; i <= 10000; ++i) { js += "/* " + i + " */ /**/"; }
-        js += "x; }";
-        var result = Uglify.minify(js, { mangle: false });
-        assert.strictEqual(result.code, "function lots_of_comments(x){return 7-x}");
-    });
-});

test/mocha/ie8.js

@@ -0,0 +1,21 @@
+var assert = require("assert");
+var UglifyJS = require("../..");
+
+describe("ie8", function() {
+    it("Should be able to minify() with undefined as catch parameter in a try...catch statement", function() {
+        assert.strictEqual(
+            UglifyJS.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

@@ -1,68 +0,0 @@
-var assert = require("assert");
-var Uglify = require("../../");
-var SourceMapConsumer = require("source-map").SourceMapConsumer;
-
-function getMap() {
-    return {
-        "version": 3,
-        "sources": ["index.js"],
-        "names": [],
-        "mappings": ";;AAAA,IAAI,MAAM,SAAN,GAAM;AAAA,SAAK,SAAS,CAAd;AAAA,CAAV;AACA,QAAQ,GAAR,CAAY,IAAI,KAAJ,CAAZ",
-        "file": "bundle.js",
-        "sourcesContent": ["let foo = x => \"foo \" + x;\nconsole.log(foo(\"bar\"));"]
-    };
-}
-
-function prepareMap(sourceMap) {
-    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: sourceMap,
-            includeSources: true,
-        }
-    });
-    if (result.error) throw result.error;
-    return new SourceMapConsumer(result.map);
-}
-
-describe("input sourcemaps", function() {
-    it("Should copy over original sourcesContent", function() {
-        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'];
-        var map = prepareMap(relativeMap);
-        assert.notEqual(map.sourcesContent, null);
-        assert.equal(map.sourcesContent.length, 1);
-        assert.equal(map.sourceContentFor("index.js"), relativeMap.sourcesContent[0]);
-    });
-
-    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);
-        });
-        map.allGeneratedPositionsFor({
-            source: "index.js",
-            line: 1,
-            column: 1
-        }).forEach(function(pos) {
-            assert.ok(pos.line <= 2, msg);
-        });
-    });
-});

test/mocha/let.js

@@ -1,5 +1,5 @@
-var Uglify = require('../../');
 var assert = require("assert");
+var UglifyJS = require("../..");
 
 describe("let", function() {
     this.timeout(30000);
@@ -10,7 +10,7 @@ describe("let", function() {
             s += "var v" + i + "=0;";
         }
         s += '}';
-        var result = Uglify.minify(s, {
+        var result = UglifyJS.minify(s, {
             compress: false
         }).code;
 
@@ -39,7 +39,7 @@ describe("let", function() {
         for (var i = 0; i < 18000; i++) {
             s += "v.b" + i + ";";
         }
-        var result = Uglify.minify(s, {
+        var result = UglifyJS.minify(s, {
             compress: false,
             ie8: true,
             mangle: {

test/mocha/line-endings.js

@@ -1,5 +1,5 @@
-var Uglify = require("../node");
 var assert = require("assert");
+var UglifyJS = require("../node");
 
 describe("line-endings", function() {
     var options = {
@@ -14,19 +14,19 @@ describe("line-endings", function() {
 
     it("Should parse LF line endings", function() {
         var js = '/*!one\n2\n3*///comment\nfunction f(x) {\n if (x)\n//comment\n  return 3;\n}\n';
-        var result = Uglify.minify(js, options);
+        var result = UglifyJS.minify(js, options);
         assert.strictEqual(result.code, expected_code);
     });
 
     it("Should parse CR/LF line endings", function() {
         var js = '/*!one\r\n2\r\n3*///comment\r\nfunction f(x) {\r\n if (x)\r\n//comment\r\n  return 3;\r\n}\r\n';
-        var result = Uglify.minify(js, options);
+        var result = UglifyJS.minify(js, options);
         assert.strictEqual(result.code, expected_code);
     });
 
     it("Should parse CR line endings", function() {
         var js = '/*!one\r2\r3*///comment\rfunction f(x) {\r if (x)\r//comment\r  return 3;\r}\r';
-        var result = Uglify.minify(js, options);
+        var result = UglifyJS.minify(js, options);
         assert.strictEqual(result.code, expected_code);
     });
 
@@ -44,16 +44,15 @@ describe("line-endings", function() {
         ]
         var test = function(input) {
             return function() {
-                Uglify.parse(input);
+                UglifyJS.parse(input);
             }
         }
         var fail = function(e) {
-            return e instanceof Uglify.JS_Parse_Error &&
-                e.message === "Unexpected line terminator";
+            return e instanceof UglifyJS.JS_Parse_Error
+                && e.message === "Unexpected line terminator";
         }
         for (var i = 0; i < inputs.length; i++) {
             assert.throws(test(inputs[i]), fail);
         }
     });
 });
-

test/mocha/minify-file-map.js

@@ -1,22 +1,22 @@
-var Uglify = require('../../');
 var assert = require("assert");
+var UglifyJS = require("../..");
 
 describe("Input file as map", function() {
     it("Should accept object", function() {
         var jsMap = {
             '/scripts/foo.js': 'var foo = {"x": 1, y: 2, \'z\': 3};'
         };
-        var result = Uglify.minify(jsMap, {sourceMap: true});
+        var result = UglifyJS.minify(jsMap, {sourceMap: true});
 
         var map = JSON.parse(result.map);
         assert.strictEqual(result.code, 'var foo={x:1,y:2,z:3};');
         assert.deepEqual(map.sources, ['/scripts/foo.js']);
         assert.strictEqual(map.file, undefined);
 
-        result = Uglify.minify(jsMap);
+        result = UglifyJS.minify(jsMap);
         assert.strictEqual(result.map, undefined);
 
-        result = Uglify.minify(jsMap, {sourceMap: {filename: 'out.js'}});
+        result = UglifyJS.minify(jsMap, {sourceMap: {filename: 'out.js'}});
         map = JSON.parse(result.map);
         assert.strictEqual(map.file, 'out.js');
     });
@@ -26,7 +26,7 @@ describe("Input file as map", function() {
             'var foo = {"x": 1, y: 2, \'z\': 3};',
             'var bar = 15;'
         ];
-        var result = Uglify.minify(jsSeq, {sourceMap: true});
+        var result = UglifyJS.minify(jsSeq, {sourceMap: true});
 
         var map = JSON.parse(result.map);
         assert.strictEqual(result.code, 'var foo={x:1,y:2,z:3},bar=15;');
@@ -37,7 +37,7 @@ describe("Input file as map", function() {
         var jsMap = {
             '/scripts/foo.js': 'var foo = {"x": 1, y: 2, \'z\': 3};'
         };
-        var result = Uglify.minify(jsMap, {sourceMap: {includeSources: true}});
+        var result = UglifyJS.minify(jsMap, {sourceMap: {includeSources: true}});
 
         var map = JSON.parse(result.map);
         assert.strictEqual(result.code, 'var foo={x:1,y:2,z:3};');

test/mocha/minify.js

@@ -1,7 +1,7 @@
-var Uglify = require('../../');
 var assert = require("assert");
 var readFileSync = require("fs").readFileSync;
 var run_code = require("../sandbox").run_code;
+var UglifyJS = require("../../");
 
 function read(path) {
     return readFileSync(path, "utf8");
@@ -10,14 +10,14 @@ function read(path) {
 describe("minify", function() {
     it("Should test basic sanity of minify with default options", function() {
         var js = 'function foo(bar) { if (bar) return 3; else return 7; var u = not_called(); }';
-        var result = Uglify.minify(js);
+        var result = UglifyJS.minify(js);
         assert.strictEqual(result.code, 'function foo(n){return n?3:7}');
     });
 
     it("Should skip inherited keys from `files`", function() {
         var files = Object.create({ skip: this });
         files[0] = "alert(1 + 1)";
-        var result = Uglify.minify(files);
+        var result = UglifyJS.minify(files);
         assert.strictEqual(result.code, "alert(2);");
     });
 
@@ -32,7 +32,7 @@ describe("minify", function() {
             "qux.js",
         ].forEach(function(file) {
             var code = read("test/input/issue-1242/" + file);
-            var result = Uglify.minify(code, {
+            var result = UglifyJS.minify(code, {
                 mangle: {
                     cache: cache,
                     toplevel: true
@@ -65,7 +65,7 @@ describe("minify", function() {
             "qux.js",
         ].forEach(function(file) {
             var code = read("test/input/issue-1242/" + file);
-            var result = Uglify.minify(code, {
+            var result = UglifyJS.minify(code, {
                 mangle: {
                     toplevel: true
                 },
@@ -96,7 +96,7 @@ describe("minify", function() {
             '"xxyyy";var j={t:2,u:3},k=4;',
             'console.log(i.s,j.t,j.u,k);',
         ].forEach(function(code) {
-            var result = Uglify.minify(code, {
+            var result = UglifyJS.minify(code, {
                 compress: false,
                 mangle: {
                     properties: true,
@@ -117,15 +117,15 @@ describe("minify", function() {
     });
 
     it("Should not parse invalid use of reserved words", function() {
-        assert.strictEqual(Uglify.minify("function enum(){}").error, undefined);
-        assert.strictEqual(Uglify.minify("function static(){}").error, undefined);
-        assert.strictEqual(Uglify.minify("function this(){}").error.message, "Unexpected token: name (this)");
+        assert.strictEqual(UglifyJS.minify("function enum(){}").error, undefined);
+        assert.strictEqual(UglifyJS.minify("function static(){}").error, undefined);
+        assert.strictEqual(UglifyJS.minify("function this(){}").error.message, "Unexpected token: name (this)");
     });
 
     describe("keep_quoted_props", function() {
         it("Should preserve quotes in object literals", function() {
             var js = 'var foo = {"x": 1, y: 2, \'z\': 3};';
-            var result = Uglify.minify(js, {
+            var result = UglifyJS.minify(js, {
                 output: {
                     keep_quoted_props: true
                 }});
@@ -134,7 +134,7 @@ describe("minify", function() {
 
         it("Should preserve quote styles when quote_style is 3", function() {
             var js = 'var foo = {"x": 1, y: 2, \'z\': 3};';
-            var result = Uglify.minify(js, {
+            var result = UglifyJS.minify(js, {
                 output: {
                     keep_quoted_props: true,
                     quote_style: 3
@@ -144,7 +144,7 @@ describe("minify", function() {
 
         it("Should not preserve quotes in object literals when disabled", function() {
             var js = 'var foo = {"x": 1, y: 2, \'z\': 3};';
-            var result = Uglify.minify(js, {
+            var result = UglifyJS.minify(js, {
                 output: {
                     keep_quoted_props: false,
                     quote_style: 3
@@ -156,7 +156,7 @@ describe("minify", function() {
     describe("mangleProperties", function() {
         it("Shouldn't mangle quoted properties", function() {
             var js = 'a["foo"] = "bar"; a.color = "red"; x = {"bar": 10};';
-            var result = Uglify.minify(js, {
+            var result = UglifyJS.minify(js, {
                 compress: {
                     properties: false
                 },
@@ -174,7 +174,7 @@ describe("minify", function() {
                     'a["foo"]="bar",a.a="red",x={"bar":10};');
         });
         it("Should not mangle quoted property within dead code", function() {
-            var result = Uglify.minify('({ "keep": 1 }); g.keep = g.change;', {
+            var result = UglifyJS.minify('({ "keep": 1 }); g.keep = g.change;', {
                 mangle: {
                     properties: {
                         keep_quoted: true
@@ -188,7 +188,7 @@ describe("minify", function() {
 
     describe("#__PURE__", function() {
         it("should drop #__PURE__ hint after use", function() {
-            var result = Uglify.minify('//@__PURE__ comment1 #__PURE__ comment2\n foo(), bar();', {
+            var result = UglifyJS.minify('//@__PURE__ comment1 #__PURE__ comment2\n foo(), bar();', {
                 output: {
                     comments: "all",
                     beautify: false,
@@ -198,7 +198,7 @@ describe("minify", function() {
             assert.strictEqual(code, "//  comment1   comment2\nbar();");
         });
         it("should drop #__PURE__ hint if function is retained", function() {
-            var result = Uglify.minify("var a = /*#__PURE__*/(function(){ foo(); })();", {
+            var result = UglifyJS.minify("var a = /*#__PURE__*/(function(){ foo(); })();", {
                 output: {
                     comments: "all",
                     beautify: false,
@@ -211,7 +211,7 @@ describe("minify", function() {
 
     describe("JS_Parse_Error", function() {
         it("should return syntax error", function() {
-            var result = Uglify.minify("function f(a{}");
+            var result = UglifyJS.minify("function f(a{}");
             var err = result.error;
             assert.ok(err instanceof Error);
             assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Unexpected token punc «{», expected punc «,»");
@@ -220,7 +220,7 @@ describe("minify", function() {
             assert.strictEqual(err.col, 12);
         });
         it("should reject duplicated label name", function() {
-            var result = Uglify.minify("L:{L:{}}");
+            var result = UglifyJS.minify("L:{L:{}}");
             var err = result.error;
             assert.ok(err instanceof Error);
             assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Label L defined twice");
@@ -232,7 +232,7 @@ describe("minify", function() {
 
     describe("global_defs", function() {
         it("should throw for non-trivial expressions", function() {
-            var result = Uglify.minify("alert(42);", {
+            var result = UglifyJS.minify("alert(42);", {
                 compress: {
                     global_defs: {
                         "@alert": "debugger"
@@ -246,7 +246,7 @@ describe("minify", function() {
         it("should skip inherited properties", function() {
             var foo = Object.create({ skip: this });
             foo.bar = 42;
-            var result = Uglify.minify("alert(FOO);", {
+            var result = UglifyJS.minify("alert(FOO);", {
                 compress: {
                     global_defs: {
                         FOO: foo
@@ -266,7 +266,7 @@ describe("minify", function() {
                 "}",
                 "f();",
             ].join("\n");
-            var ast = Uglify.minify(code, {
+            var ast = UglifyJS.minify(code, {
                 compress: false,
                 mangle: false,
                 output: {
@@ -279,7 +279,7 @@ describe("minify", function() {
             assert.strictEqual(ast.body[0].body.length, 2);
             assert.strictEqual(ast.body[0].body[0].TYPE, "SimpleStatement");
             var stat = ast.body[0].body[0];
-            Uglify.minify(ast, {
+            UglifyJS.minify(ast, {
                 compress: {
                     sequences: false
                 },
@@ -294,7 +294,7 @@ describe("minify", function() {
         it("Should be repeatable", function() {
             var code = "!function(x){return x(x)}(y);";
             for (var i = 0; i < 2; i++) {
-                assert.strictEqual(Uglify.minify(code, {
+                assert.strictEqual(UglifyJS.minify(code, {
                     compress: {
                         toplevel: true,
                     },
@@ -307,7 +307,7 @@ 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, {
+            var result = UglifyJS.minify(code, {
                 compress: false,
                 enclose: true,
                 mangle: false,
@@ -316,7 +316,7 @@ describe("minify", function() {
             assert.strictEqual(result.code, '(function(){function enclose(){console.log("test enclose")}enclose()})();');
         });
         it("Should work with arg", function() {
-            var result = Uglify.minify(code, {
+            var result = UglifyJS.minify(code, {
                 compress: false,
                 enclose: 'undefined',
                 mangle: false,
@@ -325,7 +325,7 @@ describe("minify", function() {
             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, {
+            var result = UglifyJS.minify(code, {
                 compress: false,
                 enclose: 'window,undefined:window',
                 mangle: false,
@@ -334,7 +334,7 @@ describe("minify", function() {
             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, {
+            var result = UglifyJS.minify(code, {
                 compress: false,
                 enclose: 'window,undefined:window',
                 mangle: false,

test/mocha/number-literal.js

@@ -1,24 +1,23 @@
 var assert = require("assert");
-var uglify = require("../node");
+var UglifyJS = require("../node");
 
-describe("Number literals", function () {
+describe("Number literals", function() {
     it("Should not allow legacy octal literals in strict mode", function() {
         var inputs = [
             '"use strict";00;',
             '"use strict"; var foo = 00;'
         ];
-
         var test = function(input) {
             return function() {
-                uglify.parse(input);
+                UglifyJS.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 UglifyJS.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/operator.js

@@ -1,5 +1,5 @@
-var UglifyJS = require("../node");
 var assert = require("assert");
+var UglifyJS = require("../..");
 
 describe("operator", function() {
     it("Should handle mixing of ++/+/--/- correctly", function() {

test/mocha/parentheses.js

@@ -1,5 +1,5 @@
 var assert = require("assert");
-var uglify = require("../../");
+var UglifyJS = require("../..");
 
 describe("parentheses", function() {
     it("Should add trailing parentheses for new expressions with zero arguments in beautify mode", function() {
@@ -33,7 +33,7 @@ describe("parentheses", function() {
         ];
         for (var i = 0; i < tests.length; i++) {
             assert.strictEqual(
-                uglify.minify(tests[i], {
+                UglifyJS.minify(tests[i], {
                     output: {beautify: true},
                     compress: false,
                     mangle: false
@@ -74,7 +74,7 @@ describe("parentheses", function() {
         ];
         for (var i = 0; i < tests.length; i++) {
             assert.strictEqual(
-                uglify.minify(tests[i], {
+                UglifyJS.minify(tests[i], {
                     output: {beautify: false},
                     compress: false,
                     mangle: false
@@ -94,7 +94,7 @@ describe("parentheses", function() {
             code = code.concat(code);
         }
         code = code.join("");
-        var result = uglify.minify(code, {
+        var result = UglifyJS.minify(code, {
             compress: false,
             mangle: false,
         });

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

@@ -1,19 +1,52 @@
 var assert = require("assert");
 var readFileSync = require("fs").readFileSync;
-var Uglify = require("../../");
+var SourceMapConsumer = require("source-map").SourceMapConsumer;
+var UglifyJS = require("../..");
 
 function read(path) {
     return readFileSync(path, "utf8");
 }
 
 function source_map(code) {
-    return JSON.parse(Uglify.minify(code, {
+    return JSON.parse(UglifyJS.minify(code, {
         compress: false,
         mangle: false,
         sourceMap: true,
     }).map);
 }
 
+function get_map() {
+    return {
+        "version": 3,
+        "sources": ["index.js"],
+        "names": [],
+        "mappings": ";;AAAA,IAAI,MAAM,SAAN,GAAM;AAAA,SAAK,SAAS,CAAd;AAAA,CAAV;AACA,QAAQ,GAAR,CAAY,IAAI,KAAJ,CAAZ",
+        "file": "bundle.js",
+        "sourcesContent": ["let foo = x => \"foo \" + x;\nconsole.log(foo(\"bar\"));"]
+    };
+}
+
+function prepare_map(sourceMap) {
+    var code = [
+        '"use strict";',
+        "",
+        "var foo = function foo(x) {",
+        '  return "foo " + x;',
+        "};",
+        'console.log(foo("bar"));',
+        "",
+        "//# sourceMappingURL=bundle.js.map",
+    ].join("\n");
+    var result = UglifyJS.minify(code, {
+        sourceMap: {
+            content: sourceMap,
+            includeSources: true,
+        }
+    });
+    if (result.error) throw result.error;
+    return new SourceMapConsumer(result.map);
+}
+
 describe("sourcemaps", function() {
     it("Should give correct version", function() {
         var map = source_map("var x = 1 + 1;");
@@ -36,7 +69,7 @@ describe("sourcemaps", function() {
     });
 
     it("Should mark array/object literals", function() {
-        var result = Uglify.minify([
+        var result = UglifyJS.minify([
             "var obj = {};",
             "obj.wat([]);",
         ].join("\n"), {
@@ -48,9 +81,21 @@ describe("sourcemaps", function() {
         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 = UglifyJS.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"), {
+        it("Should read the given string filename correctly when sourceMapIncludeSources is enabled", function() {
+            var result = UglifyJS.minify(read("./test/input/issue-1236/simple.js"), {
                 sourceMap: {
                     content: read("./test/input/issue-1236/simple.js.map"),
                     filename: "simple.min.js",
@@ -64,7 +109,7 @@ describe("sourcemaps", function() {
             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"), {
+            var result = UglifyJS.minify(read("./test/input/issue-520/input.js"), {
                 compress: { toplevel: true },
                 sourceMap: {
                     content: "inline",
@@ -76,13 +121,13 @@ describe("sourcemaps", function() {
             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 warn_function = UglifyJS.AST_Node.warn_function;
             var warnings = [];
-            Uglify.AST_Node.warn_function = function(txt) {
+            UglifyJS.AST_Node.warn_function = function(txt) {
                 warnings.push(txt);
             };
             try {
-                var result = Uglify.minify(read("./test/input/issue-1323/sample.js"), {
+                var result = UglifyJS.minify(read("./test/input/issue-1323/sample.js"), {
                     mangle: false,
                     sourceMap: {
                         content: "inline"
@@ -92,17 +137,17 @@ describe("sourcemaps", function() {
                 assert.strictEqual(warnings.length, 1);
                 assert.strictEqual(warnings[0], "inline source map not found: 0");
             } finally {
-                Uglify.AST_Node.warn_function = warn_function;
+                UglifyJS.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 warn_function = UglifyJS.AST_Node.warn_function;
             var warnings = [];
-            Uglify.AST_Node.warn_function = function(txt) {
+            UglifyJS.AST_Node.warn_function = function(txt) {
                 warnings.push(txt);
             };
             try {
-                var result = Uglify.minify([
+                var result = UglifyJS.minify([
                     read("./test/input/issue-520/input.js"),
                     read("./test/input/issue-1323/sample.js"),
                 ], {
@@ -119,11 +164,11 @@ describe("sourcemaps", function() {
                 assert.strictEqual(warnings.length, 1);
                 assert.strictEqual(warnings[0], "inline source map not found: 1");
             } finally {
-                Uglify.AST_Node.warn_function = warn_function;
+                UglifyJS.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"), {
+            var result = UglifyJS.minify(read("./test/input/issue-520/input.js"), {
                 compress: false,
                 mangle: false,
                 sourceMap: {
@@ -134,7 +179,7 @@ describe("sourcemaps", function() {
             if (result.error) throw result.error;
             var map = JSON.parse(result.map);
             assert.strictEqual(map.sourcesContent.length, 1);
-            result = Uglify.minify(result.code, {
+            result = UglifyJS.minify(result.code, {
                 compress: false,
                 mangle: false,
                 sourceMap: {
@@ -149,7 +194,7 @@ describe("sourcemaps", function() {
 
     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; };', {
+            var result = UglifyJS.minify('var a = function(foo) { return foo; };', {
                 sourceMap: {
                     url: "inline"
                 }
@@ -160,13 +205,13 @@ describe("sourcemaps", function() {
                 "//# 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 result = UglifyJS.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"), {
+            var result = UglifyJS.minify(read("./test/input/issue-505/input.js"), {
                 output: {
                     max_line_len: 20
                 },
@@ -182,7 +227,7 @@ describe("sourcemaps", function() {
                 "var tëst = '→unicøde←';",
                 "alert(tëst);",
             ].join("\n");
-            var result = Uglify.minify(code, {
+            var result = UglifyJS.minify(code, {
                 sourceMap: {
                     includeSources: true,
                     url: "inline",
@@ -196,7 +241,7 @@ describe("sourcemaps", function() {
             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, {
+            result = UglifyJS.minify(result.code, {
                 sourceMap: {
                     content: "inline",
                     includeSources: true,
@@ -209,4 +254,37 @@ describe("sourcemaps", function() {
             assert.strictEqual(map.names[1], "alert");
         });
     });
+
+    describe("input sourcemaps", function() {
+        it("Should copy over original sourcesContent", function() {
+            var orig = get_map();
+            var map = prepare_map(orig);
+            assert.equal(map.sourceContentFor("index.js"), orig.sourcesContent[0]);
+        });
+
+        it("Should copy sourcesContent if sources are relative", function() {
+            var relativeMap = get_map();
+            relativeMap.sources = ['./index.js'];
+            var map = prepare_map(relativeMap);
+            assert.notEqual(map.sourcesContent, null);
+            assert.equal(map.sourcesContent.length, 1);
+            assert.equal(map.sourceContentFor("index.js"), relativeMap.sourcesContent[0]);
+        });
+
+        it("Should not have invalid mappings from inputSourceMap", function() {
+            var map = prepare_map(get_map());
+            // 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);
+            });
+            map.allGeneratedPositionsFor({
+                source: "index.js",
+                line: 1,
+                column: 1
+            }).forEach(function(pos) {
+                assert.ok(pos.line <= 2, msg);
+            });
+        });
+    });
 });

test/mocha/spidermonkey.js

@@ -1,6 +1,6 @@
 var assert = require("assert");
 var exec = require("child_process").exec;
-var uglify = require("../node");
+var UglifyJS = require("../..");
 
 describe("spidermonkey export/import sanity test", function() {
     it("should produce a functional build when using --self with spidermonkey", function(done) {
@@ -25,9 +25,9 @@ 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();
+        var ast = UglifyJS.parse(input).to_mozilla_ast();
         assert.equal(
-            uglify.AST_Node.from_mozilla_ast(ast).print_to_string(),
+            UglifyJS.AST_Node.from_mozilla_ast(ast).print_to_string(),
             input
         );
     });
@@ -99,10 +99,10 @@ describe("spidermonkey export/import sanity test", function() {
         var counter_directives;
         var counter_strings;
 
-        var checkWalker = new uglify.TreeWalker(function(node, descend) {
-            if (node instanceof uglify.AST_String) {
+        var checkWalker = new UglifyJS.TreeWalker(function(node, descend) {
+            if (node instanceof UglifyJS.AST_String) {
                 counter_strings++;
-            } else if (node instanceof uglify.AST_Directive) {
+            } else if (node instanceof UglifyJS.AST_Directive) {
                 counter_directives++;
             }
         });
@@ -111,9 +111,9 @@ describe("spidermonkey export/import sanity test", function() {
             counter_directives = 0;
             counter_strings = 0;
 
-            var ast = uglify.parse(tests[i].input);
+            var ast = UglifyJS.parse(tests[i].input);
             var moz_ast = ast.to_mozilla_ast();
-            var from_moz_ast = uglify.AST_Node.from_mozilla_ast(moz_ast);
+            var from_moz_ast = UglifyJS.AST_Node.from_mozilla_ast(moz_ast);
 
             from_moz_ast.walk(checkWalker);
 

test/mocha/string-literal.js

@@ -1,5 +1,5 @@
-var UglifyJS = require("../node");
 var assert = require("assert");
+var UglifyJS = require("../node");
 
 describe("String literals", function() {
     it("Should throw syntax error if a string literal contains a newline", function() {
@@ -18,8 +18,8 @@ describe("String literals", function() {
         };
 
         var error = function(e) {
-            return e instanceof UglifyJS.JS_Parse_Error &&
-                e.message === "Unterminated string constant";
+            return e instanceof UglifyJS.JS_Parse_Error
+                && e.message === "Unterminated string constant";
         };
 
         for (var input in inputs) {
@@ -48,8 +48,8 @@ describe("String literals", function() {
         };
 
         var error = function(e) {
-            return e instanceof UglifyJS.JS_Parse_Error &&
-                e.message === "Legacy octal escape sequences are not allowed in strict mode";
+            return e instanceof UglifyJS.JS_Parse_Error
+                && e.message === "Legacy octal escape sequences are not allowed in strict mode";
         }
 
         for (var input in inputs) {

test/mocha/tokens.js

@@ -1,32 +1,26 @@
-var UglifyJS = require("../node");
 var assert = require("assert");
+var UglifyJS = require("../..");
 
-describe("Accessor tokens", function() {
-    it("Should fill the token information for accessors (issue #1492)", function() {
+describe("tokens", function() {
+    it("Should give correct positions for accessors", function() {
         // location               0         1         2         3         4
         //                        01234567890123456789012345678901234567890123456789
         var ast = UglifyJS.parse("var obj = { get latest() { return undefined; } }");
-
         // test all AST_ObjectProperty tokens are set as expected
-        var checkedAST_ObjectProperty = false;
-        var checkWalker = new UglifyJS.TreeWalker(function(node, descend) {
+        var found = false;
+        ast.walk(new UglifyJS.TreeWalker(function(node) {
             if (node instanceof UglifyJS.AST_ObjectProperty) {
-                checkedAST_ObjectProperty = true;
-
+                found = true;
                 assert.equal(node.start.pos, 12);
                 assert.equal(node.end.endpos, 46);
-
                 assert(node.key instanceof UglifyJS.AST_SymbolAccessor);
                 assert.equal(node.key.start.pos, 16);
                 assert.equal(node.key.end.endpos, 22);
-
                 assert(node.value instanceof UglifyJS.AST_Accessor);
                 assert.equal(node.value.start.pos, 22);
                 assert.equal(node.value.end.endpos, 46);
-
             }
-        });
-        ast.walk(checkWalker);
-        assert(checkedAST_ObjectProperty, "AST_ObjectProperty not found");
+        }));
+        assert(found, "AST_ObjectProperty not found");
     });
-});
+});

test/mocha/with.js

@@ -1,20 +1,20 @@
 var assert = require("assert");
-var uglify = require("../node");
+var UglifyJS = require("../node");
 
 describe("With", function() {
     it("Should throw syntaxError when using with statement in strict mode", function() {
         var code = '"use strict";\nthrow NotEarlyError;\nwith ({}) { }';
         var test = function() {
-            uglify.parse(code);
+            UglifyJS.parse(code);
         }
         var error = function(e) {
-            return e instanceof uglify.JS_Parse_Error &&
-                e.message === "Strict mode may not include a with statement";
+            return e instanceof UglifyJS.JS_Parse_Error
+                && e.message === "Strict mode may not include a with statement";
         }
         assert.throws(test, error);
     });
     it("Should set uses_with for scopes involving With statements", function() {
-        var ast = uglify.parse("with(e) {f(1, 2)}");
+        var ast = UglifyJS.parse("with(e) {f(1, 2)}");
         ast.figure_out_scope();
         assert.equal(ast.uses_with, true);
         assert.equal(ast.body[0].expression.scope.uses_with, true);

test/run-tests.js

@@ -210,7 +210,7 @@ function run_compress_tests() {
             }
         }
     }
-    files.forEach(function(file){
+    files.forEach(function(file) {
         test_file(file);
     });
 }
@@ -228,7 +228,7 @@ function parse_test(file) {
         throw e;
     }
     var tests = {};
-    var tw = new U.TreeWalker(function(node, descend){
+    var tw = new U.TreeWalker(function(node, descend) {
         if (node instanceof U.AST_LabeledStatement
             && tw.parent() instanceof U.AST_Toplevel) {
             var name = node.label.name;
@@ -271,7 +271,7 @@ function parse_test(file) {
 
     function get_one_test(name, block) {
         var test = { name: name, options: {} };
-        var tw = new U.TreeWalker(function(node, descend){
+        var tw = new U.TreeWalker(function(node, descend) {
             if (node instanceof U.AST_Assign) {
                 if (!(node.left instanceof U.AST_SymbolRef)) {
                     croak(node);

tools/node.js

@@ -14,7 +14,7 @@ var FILES = UglifyJS.FILES = [
     "../lib/propmangle.js",
     "../lib/minify.js",
     "./exports.js",
-].map(function(file){
+].map(function(file) {
     return require.resolve(file);
 });
 
@@ -33,13 +33,13 @@ function describe_ast() {
     var out = OutputStream({ beautify: true });
     function doitem(ctor) {
         out.print("AST_" + ctor.TYPE);
-        var props = ctor.SELF_PROPS.filter(function(prop){
+        var props = ctor.SELF_PROPS.filter(function(prop) {
             return !/^\$/.test(prop);
         });
         if (props.length > 0) {
             out.space();
-            out.with_parens(function(){
-                props.forEach(function(prop, i){
+            out.with_parens(function() {
+                props.forEach(function(prop, i) {
                     if (i) out.space();
                     out.print(prop);
                 });
@@ -51,8 +51,8 @@ function describe_ast() {
         }
         if (ctor.SUBCLASSES.length > 0) {
             out.space();
-            out.with_block(function(){
-                ctor.SUBCLASSES.forEach(function(ctor, i){
+            out.with_block(function() {
+                ctor.SUBCLASSES.forEach(function(ctor, i) {
                     out.indent();
                     doitem(ctor);
                     out.newline();