1052 lines
34 KiB
JavaScript
1052 lines
34 KiB
JavaScript
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/***********************************************************************
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A JavaScript tokenizer / parser / beautifier / compressor.
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https://github.com/mishoo/UglifyJS2
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-------------------------------- (C) ---------------------------------
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Author: Mihai Bazon
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<mihai.bazon@gmail.com>
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http://mihai.bazon.net/blog
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Distributed under the BSD license:
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Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the following
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disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials
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provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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***********************************************************************/
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"use strict";
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function DEFNODE(type, props, methods, base) {
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if (arguments.length < 4) base = AST_Node;
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if (!props) props = [];
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else props = props.split(/\s+/);
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var self_props = props;
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if (base && base.PROPS)
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props = props.concat(base.PROPS);
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var code = "return function AST_" + type + "(props){ if (props) { ";
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for (var i = props.length; --i >= 0;) {
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code += "this." + props[i] + " = props." + props[i] + ";";
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}
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var proto = base && new base;
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if (proto && proto.initialize || (methods && methods.initialize))
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code += "this.initialize();";
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code += "}}";
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var ctor = new Function(code)();
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if (proto) {
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ctor.prototype = proto;
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ctor.BASE = base;
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}
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if (base) base.SUBCLASSES.push(ctor);
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ctor.prototype.CTOR = ctor;
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ctor.PROPS = props || null;
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ctor.SELF_PROPS = self_props;
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ctor.SUBCLASSES = [];
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if (type) {
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ctor.prototype.TYPE = ctor.TYPE = type;
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}
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if (methods) for (i in methods) if (HOP(methods, i)) {
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if (/^\$/.test(i)) {
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ctor[i.substr(1)] = methods[i];
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} else {
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ctor.prototype[i] = methods[i];
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}
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}
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ctor.DEFMETHOD = function(name, method) {
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this.prototype[name] = method;
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};
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if (typeof exports !== "undefined") {
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exports["AST_" + type] = ctor;
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}
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return ctor;
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};
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var AST_Token = DEFNODE("Token", "type value line col pos endline endcol endpos nlb comments_before file raw", {
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}, null);
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var AST_Node = DEFNODE("Node", "start end", {
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_clone: function(deep) {
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if (deep) {
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var self = this.clone();
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return self.transform(new TreeTransformer(function(node) {
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|
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if (node !== self) {
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return node.clone(true);
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}
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}));
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}
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return new this.CTOR(this);
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},
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clone: function(deep) {
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return this._clone(deep);
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},
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$documentation: "Base class of all AST nodes",
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$propdoc: {
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start: "[AST_Token] The first token of this node",
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end: "[AST_Token] The last token of this node"
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},
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_walk: function(visitor) {
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return visitor._visit(this);
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},
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walk: function(visitor) {
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return this._walk(visitor); // not sure the indirection will be any help
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}
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}, null);
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AST_Node.warn_function = null;
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AST_Node.warn = function(txt, props) {
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if (AST_Node.warn_function)
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AST_Node.warn_function(string_template(txt, props));
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};
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/* -----[ statements ]----- */
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var AST_Statement = DEFNODE("Statement", null, {
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$documentation: "Base class of all statements",
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});
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var AST_Debugger = DEFNODE("Debugger", null, {
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$documentation: "Represents a debugger statement",
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}, AST_Statement);
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var AST_Directive = DEFNODE("Directive", "value scope quote", {
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$documentation: "Represents a directive, like \"use strict\";",
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$propdoc: {
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value: "[string] The value of this directive as a plain string (it's not an AST_String!)",
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scope: "[AST_Scope/S] The scope that this directive affects",
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quote: "[string] the original quote character"
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},
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}, AST_Statement);
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var AST_SimpleStatement = DEFNODE("SimpleStatement", "body", {
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$documentation: "A statement consisting of an expression, i.e. a = 1 + 2",
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$propdoc: {
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body: "[AST_Node] an expression node (should not be instanceof AST_Statement)"
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},
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_walk: function(visitor) {
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return visitor._visit(this, function(){
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this.body._walk(visitor);
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});
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}
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}, AST_Statement);
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function walk_body(node, visitor) {
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var body = node.body;
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if (body instanceof AST_Statement) {
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body._walk(visitor);
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}
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else for (var i = 0, len = body.length; i < len; i++) {
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body[i]._walk(visitor);
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}
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};
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var AST_Block = DEFNODE("Block", "body", {
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$documentation: "A body of statements (usually bracketed)",
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$propdoc: {
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body: "[AST_Statement*] an array of statements"
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},
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_walk: function(visitor) {
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return visitor._visit(this, function(){
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walk_body(this, visitor);
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});
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}
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}, AST_Statement);
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var AST_BlockStatement = DEFNODE("BlockStatement", null, {
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$documentation: "A block statement",
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}, AST_Block);
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var AST_EmptyStatement = DEFNODE("EmptyStatement", null, {
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$documentation: "The empty statement (empty block or simply a semicolon)",
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_walk: function(visitor) {
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return visitor._visit(this);
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}
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}, AST_Statement);
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var AST_StatementWithBody = DEFNODE("StatementWithBody", "body", {
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$documentation: "Base class for all statements that contain one nested body: `For`, `ForIn`, `Do`, `While`, `With`",
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$propdoc: {
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body: "[AST_Statement] the body; this should always be present, even if it's an AST_EmptyStatement"
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},
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_walk: function(visitor) {
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return visitor._visit(this, function(){
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this.body._walk(visitor);
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});
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}
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}, AST_Statement);
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var AST_LabeledStatement = DEFNODE("LabeledStatement", "label", {
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$documentation: "Statement with a label",
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$propdoc: {
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label: "[AST_Label] a label definition"
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||
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},
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||
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_walk: function(visitor) {
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||
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return visitor._visit(this, function(){
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||
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this.label._walk(visitor);
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this.body._walk(visitor);
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||
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});
|
||
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},
|
||
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clone: function(deep) {
|
||
|
|
var node = this._clone(deep);
|
||
|
|
if (deep) {
|
||
|
|
var refs = node.label.references;
|
||
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var label = this.label;
|
||
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node.walk(new TreeWalker(function(node) {
|
||
|
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if (node instanceof AST_LoopControl
|
||
|
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&& node.label && node.label.thedef === label) {
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||
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refs.push(node);
|
||
|
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}
|
||
|
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}));
|
||
|
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}
|
||
|
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return node;
|
||
|
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}
|
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}, AST_StatementWithBody);
|
||
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|
||
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var AST_IterationStatement = DEFNODE("IterationStatement", null, {
|
||
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$documentation: "Internal class. All loops inherit from it."
|
||
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}, AST_StatementWithBody);
|
||
|
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|
||
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var AST_DWLoop = DEFNODE("DWLoop", "condition", {
|
||
|
|
$documentation: "Base class for do/while statements",
|
||
|
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$propdoc: {
|
||
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condition: "[AST_Node] the loop condition. Should not be instanceof AST_Statement"
|
||
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}
|
||
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}, AST_IterationStatement);
|
||
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|
||
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var AST_Do = DEFNODE("Do", null, {
|
||
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$documentation: "A `do` statement",
|
||
|
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_walk: function(visitor) {
|
||
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return visitor._visit(this, function(){
|
||
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this.body._walk(visitor);
|
||
|
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this.condition._walk(visitor);
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||
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});
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||
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}
|
||
|
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}, AST_DWLoop);
|
||
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|
||
|
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var AST_While = DEFNODE("While", null, {
|
||
|
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$documentation: "A `while` statement",
|
||
|
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_walk: function(visitor) {
|
||
|
|
return visitor._visit(this, function(){
|
||
|
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this.condition._walk(visitor);
|
||
|
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this.body._walk(visitor);
|
||
|
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});
|
||
|
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}
|
||
|
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}, 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 name object", {
|
||
|
|
$documentation: "A `for ... in` statement",
|
||
|
|
$propdoc: {
|
||
|
|
init: "[AST_Node] the `for/in` initialization code",
|
||
|
|
name: "[AST_SymbolRef?] the loop variable, only if `init` is AST_Var",
|
||
|
|
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", "directives variables functions uses_with uses_eval parent_scope enclosed cname", {
|
||
|
|
$documentation: "Base class for all statements introducing a lexical scope",
|
||
|
|
$propdoc: {
|
||
|
|
directives: "[string*/S] an array of directives declared in this scope",
|
||
|
|
variables: "[Object/S] a map of name -> SymbolDef for all variables/functions defined in this scope",
|
||
|
|
functions: "[Object/S] like `variables`, but only lists function declarations",
|
||
|
|
uses_with: "[boolean/S] tells whether this scope uses the `with` statement",
|
||
|
|
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)",
|
||
|
|
},
|
||
|
|
}, AST_Block);
|
||
|
|
|
||
|
|
var AST_Toplevel = DEFNODE("Toplevel", "globals", {
|
||
|
|
$documentation: "The toplevel scope",
|
||
|
|
$propdoc: {
|
||
|
|
globals: "[Object/S] a map of name -> SymbolDef for all undeclared names",
|
||
|
|
},
|
||
|
|
wrap_enclose: function(arg_parameter_pairs) {
|
||
|
|
var self = this;
|
||
|
|
var args = [];
|
||
|
|
var parameters = [];
|
||
|
|
|
||
|
|
arg_parameter_pairs.forEach(function(pair) {
|
||
|
|
var splitAt = pair.lastIndexOf(":");
|
||
|
|
|
||
|
|
args.push(pair.substr(0, splitAt));
|
||
|
|
parameters.push(pair.substr(splitAt + 1));
|
||
|
|
});
|
||
|
|
|
||
|
|
var wrapped_tl = "(function(" + parameters.join(",") + "){ '$ORIG'; })(" + args.join(",") + ")";
|
||
|
|
wrapped_tl = parse(wrapped_tl);
|
||
|
|
wrapped_tl = wrapped_tl.transform(new TreeTransformer(function before(node){
|
||
|
|
if (node instanceof AST_Directive && node.value == "$ORIG") {
|
||
|
|
return MAP.splice(self.body);
|
||
|
|
}
|
||
|
|
}));
|
||
|
|
return wrapped_tl;
|
||
|
|
},
|
||
|
|
wrap_commonjs: function(name, export_all) {
|
||
|
|
var self = this;
|
||
|
|
var to_export = [];
|
||
|
|
if (export_all) {
|
||
|
|
self.figure_out_scope();
|
||
|
|
self.walk(new TreeWalker(function(node){
|
||
|
|
if (node instanceof AST_SymbolDeclaration && node.definition().global) {
|
||
|
|
if (!find_if(function(n){ return n.name == node.name }, to_export))
|
||
|
|
to_export.push(node);
|
||
|
|
}
|
||
|
|
}));
|
||
|
|
}
|
||
|
|
var wrapped_tl = "(function(exports, global){ '$ORIG'; '$EXPORTS'; global['" + name + "'] = exports; }({}, (function(){return this}())))";
|
||
|
|
wrapped_tl = parse(wrapped_tl);
|
||
|
|
wrapped_tl = wrapped_tl.transform(new TreeTransformer(function before(node){
|
||
|
|
if (node instanceof AST_Directive) {
|
||
|
|
switch (node.value) {
|
||
|
|
case "$ORIG":
|
||
|
|
return MAP.splice(self.body);
|
||
|
|
case "$EXPORTS":
|
||
|
|
var body = [];
|
||
|
|
to_export.forEach(function(sym){
|
||
|
|
body.push(new AST_SimpleStatement({
|
||
|
|
body: new AST_Assign({
|
||
|
|
left: new AST_Sub({
|
||
|
|
expression: new AST_SymbolRef({ name: "exports" }),
|
||
|
|
property: new AST_String({ value: sym.name }),
|
||
|
|
}),
|
||
|
|
operator: "=",
|
||
|
|
right: new AST_SymbolRef(sym),
|
||
|
|
}),
|
||
|
|
}));
|
||
|
|
});
|
||
|
|
return MAP.splice(body);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}));
|
||
|
|
return wrapped_tl;
|
||
|
|
}
|
||
|
|
}, AST_Scope);
|
||
|
|
|
||
|
|
var AST_Lambda = DEFNODE("Lambda", "name argnames uses_arguments", {
|
||
|
|
$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);
|
||
|
|
var argnames = this.argnames;
|
||
|
|
for (var i = 0, len = argnames.length; i < len; i++) {
|
||
|
|
argnames[i]._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", null, {
|
||
|
|
$documentation: "A function expression"
|
||
|
|
}, AST_Lambda);
|
||
|
|
|
||
|
|
var AST_Defun = DEFNODE("Defun", null, {
|
||
|
|
$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/CONST ]----- */
|
||
|
|
|
||
|
|
var AST_Definitions = DEFNODE("Definitions", "definitions", {
|
||
|
|
$documentation: "Base class for `var` or `const` nodes (variable declarations/initializations)",
|
||
|
|
$propdoc: {
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}, AST_Statement);
|
||
|
|
|
||
|
|
var AST_Var = DEFNODE("Var", null, {
|
||
|
|
$documentation: "A `var` statement"
|
||
|
|
}, AST_Definitions);
|
||
|
|
|
||
|
|
var AST_Const = DEFNODE("Const", null, {
|
||
|
|
$documentation: "A `const` statement"
|
||
|
|
}, AST_Definitions);
|
||
|
|
|
||
|
|
var AST_VarDef = DEFNODE("VarDef", "name value", {
|
||
|
|
$documentation: "A variable declaration; only appears in a AST_Definitions node",
|
||
|
|
$propdoc: {
|
||
|
|
name: "[AST_SymbolVar|AST_SymbolConst] 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);
|
||
|
|
var args = this.args;
|
||
|
|
for (var i = 0, len = args.length; i < len; i++) {
|
||
|
|
args[i]._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_Seq = DEFNODE("Seq", "car cdr", {
|
||
|
|
$documentation: "A sequence expression (two comma-separated expressions)",
|
||
|
|
$propdoc: {
|
||
|
|
car: "[AST_Node] first element in sequence",
|
||
|
|
cdr: "[AST_Node] second element in sequence"
|
||
|
|
},
|
||
|
|
$cons: function(x, y) {
|
||
|
|
var seq = new AST_Seq(x);
|
||
|
|
seq.car = x;
|
||
|
|
seq.cdr = y;
|
||
|
|
return seq;
|
||
|
|
},
|
||
|
|
$from_array: function(array) {
|
||
|
|
if (array.length == 0) return null;
|
||
|
|
if (array.length == 1) return array[0].clone();
|
||
|
|
var list = null;
|
||
|
|
for (var i = array.length; --i >= 0;) {
|
||
|
|
list = AST_Seq.cons(array[i], list);
|
||
|
|
}
|
||
|
|
var p = list;
|
||
|
|
while (p) {
|
||
|
|
if (p.cdr && !p.cdr.cdr) {
|
||
|
|
p.cdr = p.cdr.car;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
p = p.cdr;
|
||
|
|
}
|
||
|
|
return list;
|
||
|
|
},
|
||
|
|
to_array: function() {
|
||
|
|
var p = this, a = [];
|
||
|
|
while (p) {
|
||
|
|
a.push(p.car);
|
||
|
|
if (p.cdr && !(p.cdr instanceof AST_Seq)) {
|
||
|
|
a.push(p.cdr);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
p = p.cdr;
|
||
|
|
}
|
||
|
|
return a;
|
||
|
|
},
|
||
|
|
add: function(node) {
|
||
|
|
var p = this;
|
||
|
|
while (p) {
|
||
|
|
if (!(p.cdr instanceof AST_Seq)) {
|
||
|
|
var cell = AST_Seq.cons(p.cdr, node);
|
||
|
|
return p.cdr = cell;
|
||
|
|
}
|
||
|
|
p = p.cdr;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
len: function() {
|
||
|
|
if (this.cdr instanceof AST_Seq) {
|
||
|
|
return this.cdr.len() + 1;
|
||
|
|
} else {
|
||
|
|
return 2;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
_walk: function(visitor) {
|
||
|
|
return visitor._visit(this, function(){
|
||
|
|
this.car._walk(visitor);
|
||
|
|
if (this.cdr) this.cdr._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"
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
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", "left operator 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(){
|
||
|
|
var elements = this.elements;
|
||
|
|
for (var i = 0, len = elements.length; i < len; i++) {
|
||
|
|
elements[i]._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(){
|
||
|
|
var properties = this.properties;
|
||
|
|
for (var i = 0, len = properties.length; i < len; i++) {
|
||
|
|
properties[i]._walk(visitor);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
var AST_ObjectProperty = DEFNODE("ObjectProperty", "key value", {
|
||
|
|
$documentation: "Base class for literal object properties",
|
||
|
|
$propdoc: {
|
||
|
|
key: "[string] the property name converted to a string for ObjectKeyVal. For setters and getters this is an arbitrary AST_Node.",
|
||
|
|
value: "[AST_Node] property value. For setters and getters this is an AST_Function."
|
||
|
|
},
|
||
|
|
_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/const, function name or argument, symbol in catch)",
|
||
|
|
}, AST_Symbol);
|
||
|
|
|
||
|
|
var AST_SymbolVar = DEFNODE("SymbolVar", null, {
|
||
|
|
$documentation: "Symbol defining a variable",
|
||
|
|
}, AST_SymbolDeclaration);
|
||
|
|
|
||
|
|
var AST_SymbolConst = DEFNODE("SymbolConst", null, {
|
||
|
|
$documentation: "A constant declaration"
|
||
|
|
}, AST_SymbolDeclaration);
|
||
|
|
|
||
|
|
var AST_SymbolFunarg = DEFNODE("SymbolFunarg", null, {
|
||
|
|
$documentation: "Symbol naming a function argument",
|
||
|
|
}, AST_SymbolVar);
|
||
|
|
|
||
|
|
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", null, {
|
||
|
|
$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 literal", {
|
||
|
|
$documentation: "A number literal",
|
||
|
|
$propdoc: {
|
||
|
|
value: "[number] the numeric value",
|
||
|
|
literal: "[string] numeric value as string (optional)"
|
||
|
|
}
|
||
|
|
}, 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(node);
|
||
|
|
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(node) {
|
||
|
|
this.stack.pop();
|
||
|
|
if (node 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;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
in_boolean_context: function() {
|
||
|
|
var stack = this.stack;
|
||
|
|
var i = stack.length, self = stack[--i];
|
||
|
|
while (i > 0) {
|
||
|
|
var p = stack[--i];
|
||
|
|
if ((p instanceof AST_If && p.condition === self) ||
|
||
|
|
(p instanceof AST_Conditional && p.condition === self) ||
|
||
|
|
(p instanceof AST_DWLoop && p.condition === self) ||
|
||
|
|
(p instanceof AST_For && p.condition === self) ||
|
||
|
|
(p instanceof AST_UnaryPrefix && p.operator == "!" && p.expression === self))
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
if (!(p instanceof AST_Binary && (p.operator == "&&" || p.operator == "||")))
|
||
|
|
return false;
|
||
|
|
self = p;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
loopcontrol_target: function(node) {
|
||
|
|
var stack = this.stack;
|
||
|
|
if (node.label) for (var i = stack.length; --i >= 0;) {
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|