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988 lines
32 KiB
JavaScript
988 lines
32 KiB
JavaScript
/***********************************************************************
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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 (typeof base === "undefined") base = AST_Node;
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props = props ? props.split(/\s+/) : [];
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var self_props = props;
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if (base && base.PROPS) props = props.concat(base.PROPS);
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var code = [
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"return function AST_", type, "(props){",
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"if(props){",
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];
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props.forEach(function(prop) {
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code.push("this.", prop, "=props.", prop, ";");
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});
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var proto = base && new base;
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if (proto && proto.initialize || methods && methods.initialize) code.push("this.initialize();");
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code.push("}}");
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var ctor = new Function(code.join(""))();
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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 (var name in methods) if (HOP(methods, name)) {
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if (/^\$/.test(name)) {
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ctor[name.substr(1)] = methods[name];
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} else {
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ctor.prototype[name] = methods[name];
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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 comments_after 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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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.log_function = function(fn, verbose) {
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var printed = Object.create(null);
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if (fn) {
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AST_Node.info = verbose ? function(text, props) {
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log("INFO: " + string_template(text, props));
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} : noop;
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AST_Node.warn = function(text, props) {
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log("WARN: " + string_template(text, props));
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};
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} else {
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AST_Node.info = AST_Node.warn = noop;
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}
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function log(msg) {
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if (printed[msg]) return;
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printed[msg] = true;
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fn(msg);
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}
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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 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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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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} else body.forEach(function(node) {
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node._walk(visitor);
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});
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}
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var AST_Block = DEFNODE("Block", "body", {
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$documentation: "A body of statements (usually braced)",
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$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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}, 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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}, 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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_walk: function(visitor) {
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return visitor._visit(this, function() {
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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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clone: function(deep) {
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var node = this._clone(deep);
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if (deep) {
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var label = node.label;
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var def = this.label;
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node.walk(new TreeWalker(function(node) {
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if (node instanceof AST_LoopControl && node.label && node.label.thedef === def) {
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node.label.thedef = label;
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label.references.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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var AST_IterationStatement = DEFNODE("IterationStatement", null, {
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$documentation: "Internal class. All loops inherit from it."
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}, AST_StatementWithBody);
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var AST_DWLoop = DEFNODE("DWLoop", "condition", {
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$documentation: "Base class for do/while statements",
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$propdoc: {
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condition: "[AST_Node] the loop condition. Should not be instanceof AST_Statement"
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}
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}, AST_IterationStatement);
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var AST_Do = DEFNODE("Do", null, {
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$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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}, AST_DWLoop);
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var AST_While = DEFNODE("While", null, {
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$documentation: "A `while` statement",
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_walk: function(visitor) {
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return visitor._visit(this, function() {
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this.condition._walk(visitor);
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this.body._walk(visitor);
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});
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}
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}, AST_DWLoop);
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var AST_For = DEFNODE("For", "init condition step", {
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$documentation: "A `for` statement",
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$propdoc: {
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init: "[AST_Node?] the `for` initialization code, or null if empty",
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condition: "[AST_Node?] the `for` termination clause, or null if empty",
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step: "[AST_Node?] the `for` update clause, or null if empty"
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},
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_walk: function(visitor) {
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return visitor._visit(this, function() {
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if (this.init) this.init._walk(visitor);
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if (this.condition) this.condition._walk(visitor);
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if (this.step) this.step._walk(visitor);
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this.body._walk(visitor);
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});
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}
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}, AST_IterationStatement);
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var AST_ForIn = DEFNODE("ForIn", "init object", {
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$documentation: "A `for ... in` statement",
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$propdoc: {
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init: "[AST_Node] the `for/in` initialization code",
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object: "[AST_Node] the object that we're looping through"
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},
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_walk: function(visitor) {
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return visitor._visit(this, function() {
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this.init._walk(visitor);
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this.object._walk(visitor);
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this.body._walk(visitor);
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});
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}
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}, AST_IterationStatement);
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var AST_With = DEFNODE("With", "expression", {
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$documentation: "A `with` statement",
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$propdoc: {
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expression: "[AST_Node] the `with` expression"
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},
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_walk: function(visitor) {
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return visitor._visit(this, function() {
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this.expression._walk(visitor);
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this.body._walk(visitor);
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});
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}
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}, AST_StatementWithBody);
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/* -----[ scope and functions ]----- */
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var AST_Scope = DEFNODE("Scope", "variables functions uses_with uses_eval parent_scope enclosed cname", {
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$documentation: "Base class for all statements introducing a lexical scope",
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$propdoc: {
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variables: "[Object/S] a map of name -> SymbolDef for all variables/functions defined in this scope",
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functions: "[Object/S] like `variables`, but only lists function declarations",
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uses_with: "[boolean/S] tells whether this scope uses the `with` statement",
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uses_eval: "[boolean/S] tells whether this scope contains a direct call to the global `eval`",
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parent_scope: "[AST_Scope?/S] link to the parent scope",
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enclosed: "[SymbolDef*/S] a list of all symbol definitions that are accessed from this scope or any subscopes",
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cname: "[integer/S] current index for mangling variables (used internally by the mangler)",
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},
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clone: function(deep) {
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var node = this._clone(deep);
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if (this.variables) node.variables = this.variables.clone();
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if (this.functions) node.functions = this.functions.clone();
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if (this.enclosed) node.enclosed = this.enclosed.slice();
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return node;
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},
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pinned: function() {
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return this.uses_eval || this.uses_with;
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}
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}, AST_Block);
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var AST_Toplevel = DEFNODE("Toplevel", "globals", {
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$documentation: "The toplevel scope",
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$propdoc: {
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globals: "[Object/S] a map of name -> SymbolDef for all undeclared names",
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},
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wrap: function(name) {
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var body = this.body;
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return parse([
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"(function(exports){'$ORIG';})(typeof ",
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name,
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"=='undefined'?(",
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name,
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"={}):",
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name,
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");"
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].join(""), {
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filename: "wrap=" + JSON.stringify(name)
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}).transform(new TreeTransformer(function(node) {
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if (node instanceof AST_Directive && node.value == "$ORIG") {
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return MAP.splice(body);
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}
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}));
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},
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enclose: function(args_values) {
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if (typeof args_values != "string") args_values = "";
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var index = args_values.indexOf(":");
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if (index < 0) index = args_values.length;
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var body = this.body;
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return parse([
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"(function(",
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args_values.slice(0, index),
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'){"$ORIG"})(',
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args_values.slice(index + 1),
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")"
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].join(""), {
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filename: "enclose=" + JSON.stringify(args_values)
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}).transform(new TreeTransformer(function(node) {
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if (node instanceof AST_Directive && node.value == "$ORIG") {
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return MAP.splice(body);
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}
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}));
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}
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}, AST_Scope);
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var AST_Lambda = DEFNODE("Lambda", "name argnames uses_arguments length_read", {
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$documentation: "Base class for functions",
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$propdoc: {
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name: "[AST_SymbolDeclaration?] the name of this function",
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argnames: "[AST_SymbolFunarg*] array of function arguments",
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uses_arguments: "[boolean/S] tells whether this function accesses the arguments array"
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},
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_walk: function(visitor) {
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return visitor._visit(this, function() {
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if (this.name) this.name._walk(visitor);
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this.argnames.forEach(function(argname) {
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argname._walk(visitor);
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});
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walk_body(this, visitor);
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});
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}
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}, AST_Scope);
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var AST_Accessor = DEFNODE("Accessor", null, {
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$documentation: "A setter/getter function. The `name` property is always null."
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}, AST_Lambda);
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var AST_Function = DEFNODE("Function", "inlined", {
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$documentation: "A function expression"
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}, AST_Lambda);
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var AST_Defun = DEFNODE("Defun", "inlined", {
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$documentation: "A function definition"
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}, AST_Lambda);
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/* -----[ JUMPS ]----- */
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var AST_Jump = DEFNODE("Jump", null, {
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$documentation: "Base class for “jumps” (for now that's `return`, `throw`, `break` and `continue`)"
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}, AST_Statement);
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var AST_Exit = DEFNODE("Exit", "value", {
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$documentation: "Base class for “exits” (`return` and `throw`)",
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$propdoc: {
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value: "[AST_Node?] the value returned or thrown by this statement; could be null for AST_Return"
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},
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_walk: function(visitor) {
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return visitor._visit(this, this.value && function() {
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this.value._walk(visitor);
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});
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}
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}, AST_Jump);
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var AST_Return = DEFNODE("Return", null, {
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$documentation: "A `return` statement"
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}, AST_Exit);
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var AST_Throw = DEFNODE("Throw", null, {
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$documentation: "A `throw` statement"
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}, AST_Exit);
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var AST_LoopControl = DEFNODE("LoopControl", "label", {
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$documentation: "Base class for loop control statements (`break` and `continue`)",
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$propdoc: {
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label: "[AST_LabelRef?] the label, or null if none",
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},
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_walk: function(visitor) {
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return visitor._visit(this, this.label && function() {
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this.label._walk(visitor);
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});
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}
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}, AST_Jump);
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var AST_Break = DEFNODE("Break", null, {
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$documentation: "A `break` statement"
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}, AST_LoopControl);
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var AST_Continue = DEFNODE("Continue", null, {
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$documentation: "A `continue` statement"
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}, AST_LoopControl);
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/* -----[ IF ]----- */
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var AST_If = DEFNODE("If", "condition alternative", {
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$documentation: "A `if` statement",
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$propdoc: {
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condition: "[AST_Node] the `if` condition",
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alternative: "[AST_Statement?] the `else` part, or null if not present"
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},
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_walk: function(visitor) {
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return visitor._visit(this, function() {
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this.condition._walk(visitor);
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this.body._walk(visitor);
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if (this.alternative) this.alternative._walk(visitor);
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});
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}
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}, AST_StatementWithBody);
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/* -----[ SWITCH ]----- */
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var AST_Switch = DEFNODE("Switch", "expression", {
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$documentation: "A `switch` statement",
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$propdoc: {
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expression: "[AST_Node] the `switch` “discriminant”"
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},
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_walk: function(visitor) {
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return visitor._visit(this, function() {
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this.expression._walk(visitor);
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walk_body(this, visitor);
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});
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}
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}, AST_Block);
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var AST_SwitchBranch = DEFNODE("SwitchBranch", null, {
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$documentation: "Base class for `switch` branches",
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}, AST_Block);
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var AST_Default = DEFNODE("Default", null, {
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$documentation: "A `default` switch branch",
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}, AST_SwitchBranch);
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var AST_Case = DEFNODE("Case", "expression", {
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$documentation: "A `case` switch branch",
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$propdoc: {
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expression: "[AST_Node] the `case` expression"
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},
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_walk: function(visitor) {
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return visitor._visit(this, function() {
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this.expression._walk(visitor);
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walk_body(this, visitor);
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});
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}
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}, AST_SwitchBranch);
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/* -----[ EXCEPTIONS ]----- */
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var AST_Try = DEFNODE("Try", "bcatch bfinally", {
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$documentation: "A `try` statement",
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$propdoc: {
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bcatch: "[AST_Catch?] the catch block, or null if not present",
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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 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();
|
|
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 {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
};
|