| /*********************************************************************** |
| |
| A JavaScript tokenizer / parser / beautifier / compressor. |
| https://github.com/mishoo/UglifyJS2 |
| |
| -------------------------------- (C) --------------------------------- |
| |
| Author: Mihai Bazon |
| <mihai.bazon@gmail.com> |
| http://mihai.bazon.net/blog |
| |
| Distributed under the BSD license: |
| |
| Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com> |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| |
| * Redistributions of source code must retain the above |
| copyright notice, this list of conditions and the following |
| disclaimer. |
| |
| * Redistributions in binary form must reproduce the above |
| copyright notice, this list of conditions and the following |
| disclaimer in the documentation and/or other materials |
| provided with the distribution. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY |
| EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE |
| LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
| OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
| TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF |
| THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| SUCH DAMAGE. |
| |
| ***********************************************************************/ |
| |
| "use strict"; |
| |
| function DEFNODE(type, props, methods, base) { |
| 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){", |
| ]; |
| props.forEach(function(prop) { |
| code.push("this.", prop, "=props.", prop, ";"); |
| }); |
| var proto = base && new base; |
| 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; |
| } |
| if (base) base.SUBCLASSES.push(ctor); |
| ctor.prototype.CTOR = ctor; |
| ctor.PROPS = props || null; |
| ctor.SELF_PROPS = self_props; |
| ctor.SUBCLASSES = []; |
| if (type) { |
| ctor.prototype.TYPE = ctor.TYPE = type; |
| } |
| if (methods) for (var name in methods) if (HOP(methods, name)) { |
| if (/^\$/.test(name)) { |
| ctor[name.substr(1)] = methods[name]; |
| } else { |
| ctor.prototype[name] = methods[name]; |
| } |
| } |
| ctor.DEFMETHOD = function(name, method) { |
| this.prototype[name] = method; |
| }; |
| if (typeof exports !== "undefined") { |
| 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); |
| |
| var AST_Node = DEFNODE("Node", "start end", { |
| _clone: function(deep) { |
| if (deep) { |
| var self = this.clone(); |
| return self.transform(new TreeTransformer(function(node) { |
| if (node !== self) { |
| return node.clone(true); |
| } |
| })); |
| } |
| return new this.CTOR(this); |
| }, |
| clone: function(deep) { |
| return this._clone(deep); |
| }, |
| $documentation: "Base class of all AST nodes", |
| $propdoc: { |
| start: "[AST_Token] The first token of this node", |
| end: "[AST_Token] The last token of this node" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this); |
| }, |
| walk: function(visitor) { |
| return this._walk(visitor); // not sure the indirection will be any help |
| } |
| }, null); |
| |
| (AST_Node.log_function = function(fn, verbose) { |
| var printed = Object.create(null); |
| if (fn) { |
| AST_Node.info = verbose ? function(text, props) { |
| log("INFO: " + string_template(text, props)); |
| } : noop; |
| AST_Node.warn = function(text, props) { |
| log("WARN: " + string_template(text, props)); |
| }; |
| } else { |
| AST_Node.info = AST_Node.warn = noop; |
| } |
| |
| function log(msg) { |
| if (printed[msg]) return; |
| printed[msg] = true; |
| fn(msg); |
| } |
| })(); |
| |
| /* -----[ statements ]----- */ |
| |
| var AST_Statement = DEFNODE("Statement", null, { |
| $documentation: "Base class of all statements", |
| }); |
| |
| var AST_Debugger = DEFNODE("Debugger", null, { |
| $documentation: "Represents a debugger statement", |
| }, AST_Statement); |
| |
| var AST_Directive = DEFNODE("Directive", "value quote", { |
| $documentation: "Represents a directive, like \"use strict\";", |
| $propdoc: { |
| value: "[string] The value of this directive as a plain string (it's not an AST_String!)", |
| quote: "[string] the original quote character" |
| }, |
| }, AST_Statement); |
| |
| var AST_SimpleStatement = DEFNODE("SimpleStatement", "body", { |
| $documentation: "A statement consisting of an expression, i.e. a = 1 + 2", |
| $propdoc: { |
| body: "[AST_Node] an expression node (should not be instanceof AST_Statement)" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.body._walk(visitor); |
| }); |
| } |
| }, AST_Statement); |
| |
| function walk_body(node, visitor) { |
| var body = node.body; |
| if (body instanceof AST_Statement) { |
| body._walk(visitor); |
| } else body.forEach(function(node) { |
| node._walk(visitor); |
| }); |
| } |
| |
| var AST_Block = DEFNODE("Block", "body", { |
| $documentation: "A body of statements (usually braced)", |
| $propdoc: { |
| body: "[AST_Statement*] an array of statements" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| walk_body(this, visitor); |
| }); |
| } |
| }, AST_Statement); |
| |
| var AST_BlockStatement = DEFNODE("BlockStatement", null, { |
| $documentation: "A block statement", |
| }, AST_Block); |
| |
| var AST_EmptyStatement = DEFNODE("EmptyStatement", null, { |
| $documentation: "The empty statement (empty block or simply a semicolon)" |
| }, AST_Statement); |
| |
| var AST_StatementWithBody = DEFNODE("StatementWithBody", "body", { |
| $documentation: "Base class for all statements that contain one nested body: `For`, `ForIn`, `Do`, `While`, `With`", |
| $propdoc: { |
| body: "[AST_Statement] the body; this should always be present, even if it's an AST_EmptyStatement" |
| } |
| }, AST_Statement); |
| |
| var AST_LabeledStatement = DEFNODE("LabeledStatement", "label", { |
| $documentation: "Statement with a label", |
| $propdoc: { |
| label: "[AST_Label] a label definition" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.label._walk(visitor); |
| this.body._walk(visitor); |
| }); |
| }, |
| clone: function(deep) { |
| var node = this._clone(deep); |
| if (deep) { |
| var label = node.label; |
| var def = this.label; |
| node.walk(new TreeWalker(function(node) { |
| if (node instanceof AST_LoopControl && node.label && node.label.thedef === def) { |
| node.label.thedef = label; |
| label.references.push(node); |
| } |
| })); |
| } |
| return node; |
| } |
| }, AST_StatementWithBody); |
| |
| var AST_IterationStatement = DEFNODE("IterationStatement", null, { |
| $documentation: "Internal class. All loops inherit from it." |
| }, AST_StatementWithBody); |
| |
| var AST_DWLoop = DEFNODE("DWLoop", "condition", { |
| $documentation: "Base class for do/while statements", |
| $propdoc: { |
| condition: "[AST_Node] the loop condition. Should not be instanceof AST_Statement" |
| } |
| }, AST_IterationStatement); |
| |
| var AST_Do = DEFNODE("Do", null, { |
| $documentation: "A `do` statement", |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.body._walk(visitor); |
| this.condition._walk(visitor); |
| }); |
| } |
| }, AST_DWLoop); |
| |
| var AST_While = DEFNODE("While", null, { |
| $documentation: "A `while` statement", |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.condition._walk(visitor); |
| this.body._walk(visitor); |
| }); |
| } |
| }, AST_DWLoop); |
| |
| var AST_For = DEFNODE("For", "init condition step", { |
| $documentation: "A `for` statement", |
| $propdoc: { |
| init: "[AST_Node?] the `for` initialization code, or null if empty", |
| condition: "[AST_Node?] the `for` termination clause, or null if empty", |
| step: "[AST_Node?] the `for` update clause, or null if empty" |
| }, |
| _walk: function(visitor) { |
| 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); |
| this.body._walk(visitor); |
| }); |
| } |
| }, AST_IterationStatement); |
| |
| var AST_ForIn = DEFNODE("ForIn", "init object", { |
| $documentation: "A `for ... in` statement", |
| $propdoc: { |
| init: "[AST_Node] the `for/in` initialization code", |
| object: "[AST_Node] the object that we're looping through" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.init._walk(visitor); |
| this.object._walk(visitor); |
| this.body._walk(visitor); |
| }); |
| } |
| }, AST_IterationStatement); |
| |
| var AST_With = DEFNODE("With", "expression", { |
| $documentation: "A `with` statement", |
| $propdoc: { |
| expression: "[AST_Node] the `with` expression" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.expression._walk(visitor); |
| this.body._walk(visitor); |
| }); |
| } |
| }, AST_StatementWithBody); |
| |
| /* -----[ scope and functions ]----- */ |
| |
| var AST_Scope = DEFNODE("Scope", "variables functions uses_with uses_eval parent_scope enclosed cname", { |
| $documentation: "Base class for all statements introducing a lexical scope", |
| $propdoc: { |
| variables: "[Object/S] a map of name -> SymbolDef for all variables/functions defined in this scope", |
| functions: "[Object/S] like `variables`, but only lists function declarations", |
| uses_with: "[boolean/S] tells whether this scope uses the `with` statement", |
| uses_eval: "[boolean/S] tells whether this scope contains a direct call to the global `eval`", |
| parent_scope: "[AST_Scope?/S] link to the parent scope", |
| enclosed: "[SymbolDef*/S] a list of all symbol definitions that are accessed from this scope or any subscopes", |
| cname: "[integer/S] current index for mangling variables (used internally by the mangler)", |
| }, |
| clone: function(deep) { |
| var node = this._clone(deep); |
| if (this.variables) node.variables = this.variables.clone(); |
| if (this.functions) node.functions = this.functions.clone(); |
| if (this.enclosed) node.enclosed = this.enclosed.slice(); |
| return node; |
| }, |
| pinned: function() { |
| return this.uses_eval || this.uses_with; |
| } |
| }, AST_Block); |
| |
| var AST_Toplevel = DEFNODE("Toplevel", "globals", { |
| $documentation: "The toplevel scope", |
| $propdoc: { |
| globals: "[Object/S] a map of name -> SymbolDef for all undeclared names", |
| }, |
| wrap: function(name) { |
| var body = this.body; |
| return parse([ |
| "(function(exports){'$ORIG';})(typeof ", |
| name, |
| "=='undefined'?(", |
| name, |
| "={}):", |
| name, |
| ");" |
| ].join(""), { |
| filename: "wrap=" + JSON.stringify(name) |
| }).transform(new TreeTransformer(function(node) { |
| if (node instanceof AST_Directive && node.value == "$ORIG") { |
| return MAP.splice(body); |
| } |
| })); |
| }, |
| enclose: function(args_values) { |
| if (typeof args_values != "string") args_values = ""; |
| var index = args_values.indexOf(":"); |
| if (index < 0) index = args_values.length; |
| var body = this.body; |
| return parse([ |
| "(function(", |
| args_values.slice(0, index), |
| '){"$ORIG"})(', |
| args_values.slice(index + 1), |
| ")" |
| ].join(""), { |
| filename: "enclose=" + JSON.stringify(args_values) |
| }).transform(new TreeTransformer(function(node) { |
| if (node instanceof AST_Directive && node.value == "$ORIG") { |
| return MAP.splice(body); |
| } |
| })); |
| } |
| }, AST_Scope); |
| |
| var AST_Lambda = DEFNODE("Lambda", "name argnames uses_arguments length_read", { |
| $documentation: "Base class for functions", |
| $propdoc: { |
| name: "[AST_SymbolDeclaration?] the name of this function", |
| argnames: "[AST_SymbolFunarg*] array of function arguments", |
| uses_arguments: "[boolean/S] tells whether this function accesses the arguments array" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| if (this.name) this.name._walk(visitor); |
| this.argnames.forEach(function(argname) { |
| argname._walk(visitor); |
| }); |
| walk_body(this, visitor); |
| }); |
| } |
| }, AST_Scope); |
| |
| var AST_Accessor = DEFNODE("Accessor", null, { |
| $documentation: "A setter/getter function. The `name` property is always null." |
| }, AST_Lambda); |
| |
| var AST_Function = DEFNODE("Function", "inlined", { |
| $documentation: "A function expression" |
| }, AST_Lambda); |
| |
| var AST_Defun = DEFNODE("Defun", "inlined", { |
| $documentation: "A function definition" |
| }, AST_Lambda); |
| |
| /* -----[ JUMPS ]----- */ |
| |
| var AST_Jump = DEFNODE("Jump", null, { |
| $documentation: "Base class for “jumps” (for now that's `return`, `throw`, `break` and `continue`)" |
| }, AST_Statement); |
| |
| var AST_Exit = DEFNODE("Exit", "value", { |
| $documentation: "Base class for “exits” (`return` and `throw`)", |
| $propdoc: { |
| 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() { |
| this.value._walk(visitor); |
| }); |
| } |
| }, AST_Jump); |
| |
| var AST_Return = DEFNODE("Return", null, { |
| $documentation: "A `return` statement" |
| }, AST_Exit); |
| |
| var AST_Throw = DEFNODE("Throw", null, { |
| $documentation: "A `throw` statement" |
| }, AST_Exit); |
| |
| var AST_LoopControl = DEFNODE("LoopControl", "label", { |
| $documentation: "Base class for loop control statements (`break` and `continue`)", |
| $propdoc: { |
| label: "[AST_LabelRef?] the label, or null if none", |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, this.label && function() { |
| this.label._walk(visitor); |
| }); |
| } |
| }, AST_Jump); |
| |
| var AST_Break = DEFNODE("Break", null, { |
| $documentation: "A `break` statement" |
| }, AST_LoopControl); |
| |
| var AST_Continue = DEFNODE("Continue", null, { |
| $documentation: "A `continue` statement" |
| }, AST_LoopControl); |
| |
| /* -----[ IF ]----- */ |
| |
| var AST_If = DEFNODE("If", "condition alternative", { |
| $documentation: "A `if` statement", |
| $propdoc: { |
| condition: "[AST_Node] the `if` condition", |
| alternative: "[AST_Statement?] the `else` part, or null if not present" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.condition._walk(visitor); |
| this.body._walk(visitor); |
| if (this.alternative) this.alternative._walk(visitor); |
| }); |
| } |
| }, AST_StatementWithBody); |
| |
| /* -----[ SWITCH ]----- */ |
| |
| var AST_Switch = DEFNODE("Switch", "expression", { |
| $documentation: "A `switch` statement", |
| $propdoc: { |
| expression: "[AST_Node] the `switch` “discriminant”" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.expression._walk(visitor); |
| walk_body(this, visitor); |
| }); |
| } |
| }, AST_Block); |
| |
| var AST_SwitchBranch = DEFNODE("SwitchBranch", null, { |
| $documentation: "Base class for `switch` branches", |
| }, AST_Block); |
| |
| var AST_Default = DEFNODE("Default", null, { |
| $documentation: "A `default` switch branch", |
| }, AST_SwitchBranch); |
| |
| var AST_Case = DEFNODE("Case", "expression", { |
| $documentation: "A `case` switch branch", |
| $propdoc: { |
| expression: "[AST_Node] the `case` expression" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.expression._walk(visitor); |
| walk_body(this, visitor); |
| }); |
| } |
| }, AST_SwitchBranch); |
| |
| /* -----[ EXCEPTIONS ]----- */ |
| |
| var AST_Try = DEFNODE("Try", "bcatch bfinally", { |
| $documentation: "A `try` statement", |
| $propdoc: { |
| bcatch: "[AST_Catch?] the catch block, or null if not present", |
| bfinally: "[AST_Finally?] the finally block, or null if not present" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| walk_body(this, visitor); |
| if (this.bcatch) this.bcatch._walk(visitor); |
| if (this.bfinally) this.bfinally._walk(visitor); |
| }); |
| } |
| }, AST_Block); |
| |
| var AST_Catch = DEFNODE("Catch", "argname", { |
| $documentation: "A `catch` node; only makes sense as part of a `try` statement", |
| $propdoc: { |
| argname: "[AST_SymbolCatch] symbol for the exception" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.argname._walk(visitor); |
| walk_body(this, visitor); |
| }); |
| } |
| }, AST_Block); |
| |
| var AST_Finally = DEFNODE("Finally", null, { |
| $documentation: "A `finally` node; only makes sense as part of a `try` statement" |
| }, AST_Block); |
| |
| /* -----[ VAR ]----- */ |
| |
| var AST_Definitions = DEFNODE("Definitions", "definitions", { |
| $documentation: "Base class for `var` nodes (variable declarations/initializations)", |
| $propdoc: { |
| definitions: "[AST_VarDef*] array of variable definitions" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.definitions.forEach(function(defn) { |
| defn._walk(visitor); |
| }); |
| }); |
| } |
| }, AST_Statement); |
| |
| var AST_Var = DEFNODE("Var", null, { |
| $documentation: "A `var` statement" |
| }, AST_Definitions); |
| |
| var AST_VarDef = DEFNODE("VarDef", "name value", { |
| $documentation: "A variable declaration; only appears in a AST_Definitions node", |
| $propdoc: { |
| name: "[AST_SymbolVar] name of the variable", |
| value: "[AST_Node?] initializer, or null of there's no initializer" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.name._walk(visitor); |
| if (this.value) this.value._walk(visitor); |
| }); |
| } |
| }); |
| |
| /* -----[ OTHER ]----- */ |
| |
| var AST_Call = DEFNODE("Call", "expression args", { |
| $documentation: "A function call expression", |
| $propdoc: { |
| expression: "[AST_Node] expression to invoke as function", |
| args: "[AST_Node*] array of arguments" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.expression._walk(visitor); |
| this.args.forEach(function(node) { |
| node._walk(visitor); |
| }); |
| }); |
| } |
| }); |
| |
| var AST_New = DEFNODE("New", null, { |
| $documentation: "An object instantiation. Derives from a function call since it has exactly the same properties" |
| }, AST_Call); |
| |
| var AST_Sequence = DEFNODE("Sequence", "expressions", { |
| $documentation: "A sequence expression (comma-separated expressions)", |
| $propdoc: { |
| expressions: "[AST_Node*] array of expressions (at least two)" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.expressions.forEach(function(node) { |
| node._walk(visitor); |
| }); |
| }); |
| } |
| }); |
| |
| var AST_PropAccess = DEFNODE("PropAccess", "expression property", { |
| $documentation: "Base class for property access expressions, i.e. `a.foo` or `a[\"foo\"]`", |
| $propdoc: { |
| expression: "[AST_Node] the “container” expression", |
| property: "[AST_Node|string] the property to access. For AST_Dot this is always a plain string, while for AST_Sub it's an arbitrary AST_Node" |
| }, |
| getProperty: function() { |
| var p = this.property; |
| if (p instanceof AST_Constant) { |
| return p.getValue(); |
| } |
| if (p instanceof AST_UnaryPrefix |
| && p.operator == "void" |
| && p.expression instanceof AST_Constant) { |
| return; |
| } |
| return p; |
| } |
| }); |
| |
| var AST_Dot = DEFNODE("Dot", null, { |
| $documentation: "A dotted property access expression", |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.expression._walk(visitor); |
| }); |
| } |
| }, AST_PropAccess); |
| |
| var AST_Sub = DEFNODE("Sub", null, { |
| $documentation: "Index-style property access, i.e. `a[\"foo\"]`", |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.expression._walk(visitor); |
| this.property._walk(visitor); |
| }); |
| } |
| }, AST_PropAccess); |
| |
| var AST_Unary = DEFNODE("Unary", "operator expression", { |
| $documentation: "Base class for unary expressions", |
| $propdoc: { |
| operator: "[string] the operator", |
| expression: "[AST_Node] expression that this unary operator applies to" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.expression._walk(visitor); |
| }); |
| } |
| }); |
| |
| var AST_UnaryPrefix = DEFNODE("UnaryPrefix", null, { |
| $documentation: "Unary prefix expression, i.e. `typeof i` or `++i`" |
| }, AST_Unary); |
| |
| var AST_UnaryPostfix = DEFNODE("UnaryPostfix", null, { |
| $documentation: "Unary postfix expression, i.e. `i++`" |
| }, AST_Unary); |
| |
| var AST_Binary = DEFNODE("Binary", "operator left right", { |
| $documentation: "Binary expression, i.e. `a + b`", |
| $propdoc: { |
| left: "[AST_Node] left-hand side expression", |
| operator: "[string] the operator", |
| right: "[AST_Node] right-hand side expression" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.left._walk(visitor); |
| this.right._walk(visitor); |
| }); |
| } |
| }); |
| |
| var AST_Conditional = DEFNODE("Conditional", "condition consequent alternative", { |
| $documentation: "Conditional expression using the ternary operator, i.e. `a ? b : c`", |
| $propdoc: { |
| condition: "[AST_Node]", |
| consequent: "[AST_Node]", |
| alternative: "[AST_Node]" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.condition._walk(visitor); |
| this.consequent._walk(visitor); |
| this.alternative._walk(visitor); |
| }); |
| } |
| }); |
| |
| var AST_Assign = DEFNODE("Assign", null, { |
| $documentation: "An assignment expression — `a = b + 5`", |
| }, AST_Binary); |
| |
| /* -----[ LITERALS ]----- */ |
| |
| var AST_Array = DEFNODE("Array", "elements", { |
| $documentation: "An array literal", |
| $propdoc: { |
| elements: "[AST_Node*] array of elements" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.elements.forEach(function(element) { |
| element._walk(visitor); |
| }); |
| }); |
| } |
| }); |
| |
| var AST_Object = DEFNODE("Object", "properties", { |
| $documentation: "An object literal", |
| $propdoc: { |
| properties: "[AST_ObjectProperty*] array of properties" |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.properties.forEach(function(prop) { |
| prop._walk(visitor); |
| }); |
| }); |
| } |
| }); |
| |
| var AST_ObjectProperty = DEFNODE("ObjectProperty", "key value", { |
| $documentation: "Base class for literal object properties", |
| $propdoc: { |
| key: "[string|AST_SymbolAccessor] property name. For ObjectKeyVal this is a string. For getters and setters this is an AST_SymbolAccessor.", |
| value: "[AST_Node] property value. For getters and setters this is an AST_Accessor." |
| }, |
| _walk: function(visitor) { |
| return visitor._visit(this, function() { |
| this.value._walk(visitor); |
| }); |
| } |
| }); |
| |
| var AST_ObjectKeyVal = DEFNODE("ObjectKeyVal", "quote", { |
| $documentation: "A key: value object property", |
| $propdoc: { |
| quote: "[string] the original quote character" |
| } |
| }, AST_ObjectProperty); |
| |
| var AST_ObjectSetter = DEFNODE("ObjectSetter", null, { |
| $documentation: "An object setter property", |
| }, AST_ObjectProperty); |
| |
| var AST_ObjectGetter = DEFNODE("ObjectGetter", null, { |
| $documentation: "An object getter property", |
| }, AST_ObjectProperty); |
| |
| var AST_Symbol = DEFNODE("Symbol", "scope name thedef", { |
| $propdoc: { |
| name: "[string] name of this symbol", |
| scope: "[AST_Scope/S] the current scope (not necessarily the definition scope)", |
| thedef: "[SymbolDef/S] the definition of this symbol" |
| }, |
| $documentation: "Base class for all symbols", |
| }); |
| |
| var AST_SymbolAccessor = DEFNODE("SymbolAccessor", null, { |
| $documentation: "The name of a property accessor (setter/getter function)" |
| }, AST_Symbol); |
| |
| var AST_SymbolDeclaration = DEFNODE("SymbolDeclaration", "init", { |
| $documentation: "A declaration symbol (symbol in var, function name or argument, symbol in catch)", |
| }, AST_Symbol); |
| |
| var AST_SymbolVar = DEFNODE("SymbolVar", null, { |
| $documentation: "Symbol defining a variable", |
| }, AST_SymbolDeclaration); |
| |
| var AST_SymbolFunarg = DEFNODE("SymbolFunarg", null, { |
| $documentation: "Symbol naming a function argument", |
| }, AST_SymbolVar); |
| |
| var AST_SymbolDefun = DEFNODE("SymbolDefun", null, { |
| $documentation: "Symbol defining a function", |
| }, AST_SymbolDeclaration); |
| |
| var AST_SymbolLambda = DEFNODE("SymbolLambda", null, { |
| $documentation: "Symbol naming a function expression", |
| }, AST_SymbolDeclaration); |
| |
| var AST_SymbolCatch = DEFNODE("SymbolCatch", null, { |
| $documentation: "Symbol naming the exception in catch", |
| }, AST_SymbolDeclaration); |
| |
| var AST_Label = DEFNODE("Label", "references", { |
| $documentation: "Symbol naming a label (declaration)", |
| $propdoc: { |
| references: "[AST_LoopControl*] a list of nodes referring to this label" |
| }, |
| initialize: function() { |
| this.references = []; |
| this.thedef = this; |
| } |
| }, AST_Symbol); |
| |
| var AST_SymbolRef = DEFNODE("SymbolRef", "fixed", { |
| $documentation: "Reference to some symbol (not definition/declaration)", |
| }, AST_Symbol); |
| |
| var AST_LabelRef = DEFNODE("LabelRef", null, { |
| $documentation: "Reference to a label symbol", |
| }, AST_Symbol); |
| |
| var AST_This = DEFNODE("This", null, { |
| $documentation: "The `this` symbol", |
| }, AST_Symbol); |
| |
| var AST_Constant = DEFNODE("Constant", null, { |
| $documentation: "Base class for all constants", |
| getValue: function() { |
| return this.value; |
| } |
| }); |
| |
| var AST_String = DEFNODE("String", "value quote", { |
| $documentation: "A string literal", |
| $propdoc: { |
| value: "[string] the contents of this string", |
| quote: "[string] the original quote character" |
| } |
| }, AST_Constant); |
| |
| var AST_Number = DEFNODE("Number", "value", { |
| $documentation: "A number literal", |
| $propdoc: { |
| value: "[number] the numeric value", |
| } |
| }, AST_Constant); |
| |
| var AST_RegExp = DEFNODE("RegExp", "value", { |
| $documentation: "A regexp literal", |
| $propdoc: { |
| value: "[RegExp] the actual regexp" |
| } |
| }, AST_Constant); |
| |
| var AST_Atom = DEFNODE("Atom", null, { |
| $documentation: "Base class for atoms", |
| }, AST_Constant); |
| |
| var AST_Null = DEFNODE("Null", null, { |
| $documentation: "The `null` atom", |
| value: null |
| }, AST_Atom); |
| |
| var AST_NaN = DEFNODE("NaN", null, { |
| $documentation: "The impossible value", |
| value: 0/0 |
| }, AST_Atom); |
| |
| var AST_Undefined = DEFNODE("Undefined", null, { |
| $documentation: "The `undefined` value", |
| value: function(){}() |
| }, AST_Atom); |
| |
| var AST_Hole = DEFNODE("Hole", null, { |
| $documentation: "A hole in an array", |
| value: function(){}() |
| }, AST_Atom); |
| |
| var AST_Infinity = DEFNODE("Infinity", null, { |
| $documentation: "The `Infinity` value", |
| value: 1/0 |
| }, AST_Atom); |
| |
| var AST_Boolean = DEFNODE("Boolean", null, { |
| $documentation: "Base class for booleans", |
| }, AST_Atom); |
| |
| var AST_False = DEFNODE("False", null, { |
| $documentation: "The `false` atom", |
| value: false |
| }, AST_Boolean); |
| |
| var AST_True = DEFNODE("True", null, { |
| $documentation: "The `true` atom", |
| value: true |
| }, AST_Boolean); |
| |
| /* -----[ TreeWalker ]----- */ |
| |
| 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() { |
| descend.call(node); |
| } : noop); |
| if (!ret && descend) { |
| descend.call(node); |
| } |
| this.pop(); |
| return ret; |
| }, |
| parent: function(n) { |
| return this.stack[this.stack.length - 2 - (n || 0)]; |
| }, |
| push: function(node) { |
| if (node instanceof AST_Lambda) { |
| this.directives = Object.create(this.directives); |
| } else if (node instanceof AST_Directive && !this.directives[node.value]) { |
| this.directives[node.value] = node; |
| } |
| this.stack.push(node); |
| }, |
| pop: function() { |
| if (this.stack.pop() instanceof AST_Lambda) { |
| this.directives = Object.getPrototypeOf(this.directives); |
| } |
| }, |
| self: function() { |
| return this.stack[this.stack.length - 1]; |
| }, |
| find_parent: function(type) { |
| var stack = this.stack; |
| for (var i = stack.length; --i >= 0;) { |
| var x = stack[i]; |
| if (x instanceof type) return x; |
| } |
| }, |
| has_directive: function(type) { |
| var dir = this.directives[type]; |
| if (dir) return dir; |
| var node = this.stack[this.stack.length - 1]; |
| if (node instanceof AST_Scope) { |
| for (var i = 0; i < node.body.length; ++i) { |
| var st = node.body[i]; |
| if (!(st instanceof AST_Directive)) break; |
| if (st.value == type) return st; |
| } |
| } |
| }, |
| loopcontrol_target: function(node) { |
| var stack = this.stack; |
| if (node.label) for (var i = stack.length; --i >= 0;) { |
| var x = stack[i]; |
| if (x instanceof AST_LabeledStatement && x.label.name == node.label.name) |
| return x.body; |
| } else for (var i = stack.length; --i >= 0;) { |
| var x = stack[i]; |
| if (x instanceof AST_IterationStatement |
| || node instanceof AST_Break && x instanceof AST_Switch) |
| return x; |
| } |
| }, |
| in_boolean_context: function() { |
| var self = this.self(); |
| for (var i = 0, p; p = this.parent(i); i++) { |
| if (p instanceof AST_SimpleStatement |
| || p instanceof AST_Conditional && p.condition === self |
| || p instanceof AST_DWLoop && p.condition === self |
| || p instanceof AST_For && p.condition === self |
| || p instanceof AST_If && p.condition === self |
| || p instanceof AST_UnaryPrefix && p.operator == "!" && p.expression === self) { |
| return true; |
| } |
| if (p instanceof AST_Binary && (p.operator == "&&" || p.operator == "||") |
| || p instanceof AST_Conditional |
| || p.tail_node() === self) { |
| self = p; |
| } else if (p instanceof AST_Return) { |
| var fn; |
| do { |
| fn = this.parent(++i); |
| if (!fn) return false; |
| } while (!(fn instanceof AST_Lambda)); |
| if (fn.name) return false; |
| self = this.parent(++i); |
| if (!self || self.TYPE != "Call" || self.expression !== fn) return false; |
| } else { |
| return false; |
| } |
| } |
| } |
| }; |
