1226 lines
41 KiB
JavaScript
1226 lines
41 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 (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 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.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 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_Node) {
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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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}, 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
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&& 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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$propdoc: {
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init: "[AST_Node] the `for/in` initialization code",
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object: "[AST_Node] the object that we're looping through"
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},
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_walk: function(visitor) {
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return visitor._visit(this, function(){
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this.init._walk(visitor);
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this.object._walk(visitor);
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this.body._walk(visitor);
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});
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}
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}, AST_IterationStatement);
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var AST_ForOf = DEFNODE("ForOf", null, {
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$documentation: "A `for ... of` statement",
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}, AST_ForIn);
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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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get_defun_scope: function() {
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var self = this;
|
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while (self.is_block_scope()) {
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self = self.parent_scope;
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}
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return self;
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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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}, 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_commonjs: function(name) {
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var body = this.body;
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var wrapped_tl = "(function(exports){'$ORIG';})(typeof " + name + "=='undefined'?(" + name + "={}):" + name + ");";
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wrapped_tl = parse(wrapped_tl);
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wrapped_tl = wrapped_tl.transform(new TreeTransformer(function before(node){
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if (node instanceof AST_Directive && node.value == "$ORIG") {
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return MAP.splice(body);
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}
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}));
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return wrapped_tl;
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}
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}, AST_Scope);
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var AST_Expansion = DEFNODE("Expansion", "expression", {
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$documentation: "An expandible argument, such as ...rest, a splat, such as [1,2,...all], or an expansion in a variable declaration, such as var [first, ...rest] = list",
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$propdoc: {
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expression: "[AST_Node] the thing to be expanded"
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},
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_walk: function(visitor) {
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var self = this;
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return visitor._visit(this, function(){
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self.expression.walk(visitor);
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});
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}
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});
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var AST_Lambda = DEFNODE("Lambda", "name argnames uses_arguments is_generator async", {
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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|AST_Destructuring|AST_Expansion|AST_DefaultAssign*] array of function arguments, destructurings, or expanding arguments",
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uses_arguments: "[boolean/S] tells whether this function accesses the arguments array",
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|
is_generator: "[boolean] is this a generator method",
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async: "[boolean] is this method async",
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},
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args_as_names: function () {
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var out = [];
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for (var i = 0; i < this.argnames.length; i++) {
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if (this.argnames[i] instanceof AST_Destructuring) {
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out = out.concat(this.argnames[i].all_symbols());
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} else {
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out.push(this.argnames[i]);
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}
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}
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return out;
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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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var argnames = this.argnames;
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for (var i = 0, len = argnames.length; i < len; i++) {
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argnames[i]._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_Arrow = DEFNODE("Arrow", "inlined", {
|
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$documentation: "An ES6 Arrow function ((a) => b)"
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}, AST_Lambda);
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var AST_Defun = DEFNODE("Defun", "inlined", {
|
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$documentation: "A function definition"
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}, AST_Lambda);
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|
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/* -----[ DESTRUCTURING ]----- */
|
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var AST_Destructuring = DEFNODE("Destructuring", "names is_array", {
|
|
$documentation: "A destructuring of several names. Used in destructuring assignment and with destructuring function argument names",
|
|
$propdoc: {
|
|
"names": "[AST_Node*] Array of properties or elements",
|
|
"is_array": "[Boolean] Whether the destructuring represents an object or array"
|
|
},
|
|
_walk: function(visitor) {
|
|
return visitor._visit(this, function(){
|
|
this.names.forEach(function(name){
|
|
name._walk(visitor);
|
|
});
|
|
});
|
|
},
|
|
all_symbols: function() {
|
|
var out = [];
|
|
this.walk(new TreeWalker(function (node) {
|
|
if (node instanceof AST_Symbol) {
|
|
out.push(node);
|
|
}
|
|
if (node instanceof AST_Expansion) {
|
|
out.push(node.expression);
|
|
}
|
|
}));
|
|
return out;
|
|
}
|
|
});
|
|
|
|
var AST_PrefixedTemplateString = DEFNODE("PrefixedTemplateString", "template_string prefix", {
|
|
$documentation: "A templatestring with a prefix, such as String.raw`foobarbaz`",
|
|
$propdoc: {
|
|
template_string: "[AST_TemplateString] The template string",
|
|
prefix: "[AST_SymbolRef|AST_PropAccess] The prefix, which can be a symbol such as `foo` or a dotted expression such as `String.raw`."
|
|
},
|
|
_walk: function(visitor) {
|
|
this.prefix._walk(visitor);
|
|
this.template_string._walk(visitor);
|
|
}
|
|
})
|
|
|
|
var AST_TemplateString = DEFNODE("TemplateString", "segments", {
|
|
$documentation: "A template string literal",
|
|
$propdoc: {
|
|
segments: "[AST_Node*] One or more segments, starting with AST_TemplateSegment. AST_Node may follow AST_TemplateSegment, but each AST_Node must be followed by AST_TemplateSegment."
|
|
},
|
|
_walk: function(visitor) {
|
|
return visitor._visit(this, function(){
|
|
this.segments.forEach(function(seg){
|
|
seg._walk(visitor);
|
|
});
|
|
});
|
|
}
|
|
});
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|
|
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var AST_TemplateSegment = DEFNODE("TemplateSegment", "value raw", {
|
|
$documentation: "A segment of a template string literal",
|
|
$propdoc: {
|
|
value: "Content of the segment",
|
|
raw: "Raw content of the segment"
|
|
}
|
|
});
|
|
|
|
/* -----[ 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|AST_Destructuring|AST_Expansion|AST_DefaultAssign] 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_Let = DEFNODE("Let", null, {
|
|
$documentation: "A `let` statement"
|
|
}, AST_Definitions);
|
|
|
|
var AST_Const = DEFNODE("Const", null, {
|
|
$documentation: "A `const` statement"
|
|
}, AST_Definitions);
|
|
|
|
var AST_NameMapping = DEFNODE("NameMapping", "foreign_name name", {
|
|
$documentation: "The part of the export/import statement that declare names from a module.",
|
|
$propdoc: {
|
|
foreign_name: "[AST_SymbolExportForeign|AST_SymbolImportForeign] The name being exported/imported (as specified in the module)",
|
|
name: "[AST_SymbolExport|AST_SymbolImport] The name as it is visible to this module."
|
|
},
|
|
_walk: function (visitor) {
|
|
return visitor._visit(this, function() {
|
|
this.foreign_name._walk(visitor);
|
|
this.name._walk(visitor);
|
|
});
|
|
}
|
|
})
|
|
|
|
var AST_Import = DEFNODE("Import", "imported_name imported_names module_name", {
|
|
$documentation: "An `import` statement",
|
|
$propdoc: {
|
|
imported_name: "[AST_SymbolImport] The name of the variable holding the module's default export.",
|
|
imported_names: "[AST_NameMapping*] The names of non-default imported variables",
|
|
module_name: "[AST_String] String literal describing where this module came from",
|
|
},
|
|
_walk: function(visitor) {
|
|
return visitor._visit(this, function() {
|
|
if (this.imported_name) {
|
|
this.imported_name._walk(visitor);
|
|
}
|
|
if (this.imported_names) {
|
|
this.imported_names.forEach(function(name_import) {
|
|
name_import._walk(visitor);
|
|
});
|
|
}
|
|
this.module_name._walk(visitor);
|
|
});
|
|
}
|
|
});
|
|
|
|
var AST_Export = DEFNODE("Export", "exported_definition exported_value is_default exported_names module_name", {
|
|
$documentation: "An `export` statement",
|
|
$propdoc: {
|
|
exported_definition: "[AST_Defun|AST_Definitions|AST_DefClass?] An exported definition",
|
|
exported_value: "[AST_Node?] An exported value",
|
|
exported_names: "[AST_NameMapping*?] List of exported names",
|
|
module_name: "[AST_String?] Name of the file to load exports from",
|
|
is_default: "[Boolean] Whether this is the default exported value of this module"
|
|
},
|
|
_walk: function (visitor) {
|
|
visitor._visit(this, function () {
|
|
if (this.exported_definition) {
|
|
this.exported_definition._walk(visitor);
|
|
}
|
|
if (this.exported_value) {
|
|
this.exported_value._walk(visitor);
|
|
}
|
|
if (this.exported_names) {
|
|
this.exported_names.forEach(function(name_export) {
|
|
name_export._walk(visitor);
|
|
});
|
|
}
|
|
if (this.module_name) {
|
|
this.module_name._walk(visitor);
|
|
}
|
|
});
|
|
}
|
|
}, AST_Statement);
|
|
|
|
var AST_VarDef = DEFNODE("VarDef", "name value", {
|
|
$documentation: "A variable declaration; only appears in a AST_Definitions node",
|
|
$propdoc: {
|
|
name: "[AST_Destructuring|AST_SymbolConst|AST_SymbolLet|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(){
|
|
var args = this.args;
|
|
for (var i = 0, len = args.length; i < len; i++) {
|
|
args[i]._walk(visitor);
|
|
}
|
|
this.expression._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"
|
|
}
|
|
});
|
|
|
|
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);
|
|
|
|
var AST_DefaultAssign = DEFNODE("DefaultAssign", null, {
|
|
$documentation: "A default assignment expression like in `(a = 3) => a`"
|
|
}, 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|AST_Node] property name. For ObjectKeyVal this is a string. For getters, setters and computed property this is an AST_Node.",
|
|
value: "[AST_Node] property value. For getters and setters this is an AST_Accessor."
|
|
},
|
|
_walk: function(visitor) {
|
|
return visitor._visit(this, function(){
|
|
if (this.key instanceof AST_Node)
|
|
this.key._walk(visitor);
|
|
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", "quote static", {
|
|
$propdoc: {
|
|
quote: "[string|undefined] the original quote character, if any",
|
|
static: "[boolean] whether this is a static setter (classes only)"
|
|
},
|
|
$documentation: "An object setter property",
|
|
}, AST_ObjectProperty);
|
|
|
|
var AST_ObjectGetter = DEFNODE("ObjectGetter", "quote static", {
|
|
$propdoc: {
|
|
quote: "[string|undefined] the original quote character, if any",
|
|
static: "[boolean] whether this is a static getter (classes only)"
|
|
},
|
|
$documentation: "An object getter property",
|
|
}, AST_ObjectProperty);
|
|
|
|
var AST_ConciseMethod = DEFNODE("ConciseMethod", "quote static is_generator async", {
|
|
$propdoc: {
|
|
quote: "[string|undefined] the original quote character, if any",
|
|
static: "[boolean] is this method static (classes only)",
|
|
is_generator: "[boolean] is this a generator method",
|
|
async: "[boolean] is this method async",
|
|
},
|
|
$documentation: "An ES6 concise method inside an object or class"
|
|
}, AST_ObjectProperty);
|
|
|
|
var AST_Class = DEFNODE("Class", "name extends properties inlined", {
|
|
$propdoc: {
|
|
name: "[AST_SymbolClass|AST_SymbolDefClass?] optional class name.",
|
|
extends: "[AST_Node]? optional parent class",
|
|
properties: "[AST_ObjectProperty*] array of properties"
|
|
},
|
|
$documentation: "An ES6 class",
|
|
_walk: function(visitor) {
|
|
return visitor._visit(this, function(){
|
|
if (this.name) {
|
|
this.name._walk(visitor);
|
|
}
|
|
if (this.extends) {
|
|
this.extends._walk(visitor);
|
|
}
|
|
this.properties.forEach(function(prop){
|
|
prop._walk(visitor);
|
|
});
|
|
});
|
|
},
|
|
}, AST_Scope);
|
|
|
|
var AST_DefClass = DEFNODE("DefClass", null, {
|
|
$documentation: "A class definition",
|
|
}, AST_Class);
|
|
|
|
var AST_ClassExpression = DEFNODE("ClassExpression", null, {
|
|
$documentation: "A class expression."
|
|
}, AST_Class);
|
|
|
|
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_NewTarget = DEFNODE("NewTarget", null, {
|
|
$documentation: "A reference to new.target"
|
|
});
|
|
|
|
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_SymbolBlockDeclaration = DEFNODE("SymbolBlockDeclaration", null, {
|
|
$documentation: "Base class for block-scoped declaration symbols"
|
|
}, AST_SymbolDeclaration);
|
|
|
|
var AST_SymbolConst = DEFNODE("SymbolConst", null, {
|
|
$documentation: "A constant declaration"
|
|
}, AST_SymbolBlockDeclaration);
|
|
|
|
var AST_SymbolLet = DEFNODE("SymbolLet", null, {
|
|
$documentation: "A block-scoped `let` declaration"
|
|
}, AST_SymbolBlockDeclaration);
|
|
|
|
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_SymbolMethod = DEFNODE("SymbolMethod", null, {
|
|
$documentation: "Symbol in an object defining a method",
|
|
}, AST_Symbol);
|
|
|
|
var AST_SymbolLambda = DEFNODE("SymbolLambda", null, {
|
|
$documentation: "Symbol naming a function expression",
|
|
}, AST_SymbolDeclaration);
|
|
|
|
var AST_SymbolDefClass = DEFNODE("SymbolDefClass", null, {
|
|
$documentation: "Symbol naming a class's name in a class declaration. Lexically scoped to its containing scope, and accessible within the class."
|
|
}, AST_SymbolBlockDeclaration);
|
|
|
|
var AST_SymbolClass = DEFNODE("SymbolClass", null, {
|
|
$documentation: "Symbol naming a class's name. Lexically scoped to the class."
|
|
}, AST_SymbolDeclaration);
|
|
|
|
var AST_SymbolCatch = DEFNODE("SymbolCatch", null, {
|
|
$documentation: "Symbol naming the exception in catch",
|
|
}, AST_SymbolBlockDeclaration);
|
|
|
|
var AST_SymbolImport = DEFNODE("SymbolImport", null, {
|
|
$documentation: "Symbol referring to an imported name",
|
|
}, AST_SymbolBlockDeclaration);
|
|
|
|
var AST_SymbolImportForeign = DEFNODE("SymbolImportForeign", null, {
|
|
$documentation: "A symbol imported from a module, but it is defined in the other module, and its real name is irrelevant for this module's purposes",
|
|
}, AST_Symbol);
|
|
|
|
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_SymbolExport = DEFNODE("SymbolExport", null, {
|
|
$documentation: "Symbol referring to a name to export",
|
|
}, AST_SymbolRef);
|
|
|
|
var AST_SymbolExportForeign = DEFNODE("SymbolExportForeign", null, {
|
|
$documentation: "A symbol exported from this module, but it is used in the other module, and its real name is irrelevant for this module's purposes",
|
|
}, 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_Super = DEFNODE("Super", null, {
|
|
$documentation: "The `super` symbol",
|
|
}, AST_This);
|
|
|
|
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);
|
|
|
|
var AST_Await = DEFNODE("Await", "expression", {
|
|
$documentation: "An `await` statement",
|
|
$propdoc: {
|
|
expression: "[AST_Node] the mandatory expression being awaited",
|
|
},
|
|
_walk: function(visitor) {
|
|
return visitor._visit(this, function(){
|
|
this.expression._walk(visitor);
|
|
});
|
|
}
|
|
});
|
|
|
|
var AST_Yield = DEFNODE("Yield", "expression is_star", {
|
|
$documentation: "A `yield` statement",
|
|
$propdoc: {
|
|
expression: "[AST_Node?] the value returned or thrown by this statement; could be null (representing undefined) but only when is_star is set to false",
|
|
is_star: "[Boolean] Whether this is a yield or yield* statement"
|
|
},
|
|
_walk: function(visitor) {
|
|
return visitor._visit(this, this.expression && function(){
|
|
this.expression._walk(visitor);
|
|
});
|
|
}
|
|
});
|
|
|
|
/* -----[ 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;
|
|
} else if (node instanceof AST_Class) {
|
|
this.directives = Object.create(this.directives);
|
|
if (!this.directives["use strict"]) {
|
|
this.directives["use strict"] = node;
|
|
}
|
|
}
|
|
this.stack.push(node);
|
|
},
|
|
pop: function() {
|
|
var node = this.stack.pop();
|
|
if (node instanceof AST_Lambda || node instanceof AST_Class) {
|
|
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 && node.body) {
|
|
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;
|
|
}
|
|
}
|
|
};
|