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Diffstat (limited to 'node_modules/uglify-js/lib/ast.js')
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diff --git a/node_modules/uglify-js/lib/ast.js b/node_modules/uglify-js/lib/ast.js new file mode 100644 index 0000000..a3b8021 --- /dev/null +++ b/node_modules/uglify-js/lib/ast.js @@ -0,0 +1,992 @@ +/*********************************************************************** + + A JavaScript tokenizer / parser / beautifier / compressor. + https://github.com/mishoo/UglifyJS2 + + -------------------------------- (C) --------------------------------- + + Author: Mihai Bazon + http://mihai.bazon.net/blog + + Distributed under the BSD license: + + Copyright 2012 (c) Mihai Bazon <[email protected]> + + 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) { + node.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 == "$ORIG") { + return List.splice(body); + } + })); + }, + enclose: function(args_values) { + if (typeof args_values != "string") args_values = ""; + var index = args_values.indexOf(":"); + if (index < 0) index = args_values.length; + var body = this.body; + return parse([ + "(function(", + args_values.slice(0, index), + '){"$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 List.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.value; + } + 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", +}); + +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_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_Return && p.in_bool + || p instanceof AST_Sequence && p.tail_node() !== self + || p instanceof AST_SimpleStatement + || 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; + } + } + } +}; |