2055 lines
72 KiB
JavaScript
2055 lines
72 KiB
JavaScript
/***********************************************************************
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A JavaScript tokenizer / parser / beautifier / compressor.
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https://github.com/mishoo/UglifyJS
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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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visitor.visit(this);
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},
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_validate: function() {
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if (this.TYPE == "Node") throw new Error("should not instantiate AST_Node");
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},
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validate: function() {
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var ctor = this.CTOR;
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do {
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ctor.prototype._validate.call(this);
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} while (ctor = ctor.BASE);
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},
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validate_ast: function() {
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var marker = {};
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this.walk(new TreeWalker(function(node) {
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if (node.validate_visited === marker) {
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throw new Error(string_template("cannot reuse {type} from [{file}:{line},{col}]", {
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type: "AST_" + node.TYPE,
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file: node.start.file,
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line: node.start.line,
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col: node.start.col,
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}));
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}
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node.validate_visited = marker;
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}));
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},
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}, null);
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(AST_Node.log_function = function(fn, verbose) {
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if (typeof fn != "function") {
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AST_Node.info = AST_Node.warn = noop;
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return;
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}
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var printed = Object.create(null);
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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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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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var restore_transforms = [];
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AST_Node.enable_validation = function() {
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AST_Node.disable_validation();
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(function validate_transform(ctor) {
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ctor.SUBCLASSES.forEach(validate_transform);
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if (!HOP(ctor.prototype, "transform")) return;
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var transform = ctor.prototype.transform;
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ctor.prototype.transform = function(tw, in_list) {
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var node = transform.call(this, tw, in_list);
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if (node instanceof AST_Node) {
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node.validate();
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} else if (!(node === null || in_list && List.is_op(node))) {
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throw new Error("invalid transformed value: " + node);
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}
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return node;
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};
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restore_transforms.push(function() {
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ctor.prototype.transform = transform;
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});
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})(this);
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};
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AST_Node.disable_validation = function() {
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var restore;
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while (restore = restore_transforms.pop()) restore();
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};
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/* -----[ statements ]----- */
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var AST_Statement = DEFNODE("Statement", null, {
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$documentation: "Base class of all statements",
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_validate: function() {
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if (this.TYPE == "Statement") throw new Error("should not instantiate AST_Statement");
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},
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});
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var AST_Debugger = DEFNODE("Debugger", null, {
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$documentation: "Represents a debugger statement",
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}, AST_Statement);
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var AST_Directive = DEFNODE("Directive", "quote value", {
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$documentation: "Represents a directive, like \"use strict\";",
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$propdoc: {
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quote: "[string?] the original quote character",
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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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},
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_validate: function() {
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if (this.quote != null) {
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if (typeof this.quote != "string") throw new Error("quote must be string");
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if (!/^["']$/.test(this.quote)) throw new Error("invalid quote: " + this.quote);
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}
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if (typeof this.value != "string") throw new Error("value must be string");
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},
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}, AST_Statement);
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var AST_EmptyStatement = DEFNODE("EmptyStatement", null, {
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$documentation: "The empty statement (empty block or simply a semicolon)"
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}, AST_Statement);
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function is_statement(node) {
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return node instanceof AST_Statement
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&& !(node instanceof AST_ClassExpression)
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&& !(node instanceof AST_LambdaExpression);
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}
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function validate_expression(value, prop, multiple, allow_spread, allow_hole) {
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multiple = multiple ? "contain" : "be";
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if (!(value instanceof AST_Node)) throw new Error(prop + " must " + multiple + " AST_Node");
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if (value instanceof AST_DefaultValue) throw new Error(prop + " cannot " + multiple + " AST_DefaultValue");
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if (value instanceof AST_Destructured) throw new Error(prop + " cannot " + multiple + " AST_Destructured");
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if (value instanceof AST_Hole && !allow_hole) throw new Error(prop + " cannot " + multiple + " AST_Hole");
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if (value instanceof AST_Spread && !allow_spread) throw new Error(prop + " cannot " + multiple + " AST_Spread");
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if (is_statement(value)) throw new Error(prop + " cannot " + multiple + " AST_Statement");
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if (value instanceof AST_SymbolDeclaration) {
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throw new Error(prop + " cannot " + multiple + " AST_SymbolDeclaration");
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}
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}
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function must_be_expression(node, prop) {
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validate_expression(node[prop], prop);
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}
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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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var node = this;
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visitor.visit(node, function() {
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node.body.walk(visitor);
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});
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},
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_validate: function() {
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must_be_expression(this, "body");
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},
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}, AST_Statement);
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var AST_BlockScope = DEFNODE("BlockScope", "enclosed functions make_def parent_scope variables", {
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$documentation: "Base class for all statements introducing a lexical scope",
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$propdoc: {
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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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functions: "[Object/S] like `variables`, but only lists function declarations",
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parent_scope: "[AST_Scope?/S] link to the parent scope",
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|
variables: "[Object/S] a map of name ---> SymbolDef for all variables/functions defined in this scope",
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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.enclosed) node.enclosed = this.enclosed.slice();
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if (this.functions) node.functions = this.functions.clone();
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|
if (this.variables) node.variables = this.variables.clone();
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return node;
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},
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|
pinned: function() {
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|
return this.resolve().pinned();
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},
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resolve: function() {
|
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return this.parent_scope.resolve();
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},
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_validate: function() {
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if (this.TYPE == "BlockScope") throw new Error("should not instantiate AST_BlockScope");
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if (this.parent_scope == null) return;
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if (!(this.parent_scope instanceof AST_BlockScope)) throw new Error("parent_scope must be AST_BlockScope");
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if (!(this.resolve() instanceof AST_Scope)) throw new Error("must be contained within AST_Scope");
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},
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}, AST_Statement);
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function walk_body(node, visitor) {
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node.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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var node = this;
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visitor.visit(node, function() {
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walk_body(node, visitor);
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});
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},
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_validate: function() {
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if (this.TYPE == "Block") throw new Error("should not instantiate AST_Block");
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this.body.forEach(function(node) {
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if (!is_statement(node)) throw new Error("body must contain AST_Statement");
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});
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},
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}, AST_BlockScope);
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var AST_BlockStatement = DEFNODE("BlockStatement", null, {
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$documentation: "A block statement",
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}, AST_Block);
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var AST_StatementWithBody = DEFNODE("StatementWithBody", "body", {
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$documentation: "Base class for all statements that contain one nested body: `For`, `ForIn`, `Do`, `While`, `With`",
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$propdoc: {
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body: "[AST_Statement] the body; this should always be present, even if it's an AST_EmptyStatement"
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},
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_validate: function() {
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if (this.TYPE == "StatementWithBody") throw new Error("should not instantiate AST_StatementWithBody");
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if (!is_statement(this.body)) throw new Error("body must be AST_Statement");
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},
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}, AST_BlockScope);
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var AST_LabeledStatement = DEFNODE("LabeledStatement", "label", {
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$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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var node = this;
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visitor.visit(node, function() {
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node.label.walk(visitor);
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node.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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if (!node.label || node.label.thedef !== def) return;
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node.label.thedef = label;
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label.references.push(node);
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return true;
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}
|
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if (node instanceof AST_Scope) return true;
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}));
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}
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return node;
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},
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_validate: function() {
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if (!(this.label instanceof AST_Label)) throw new Error("label must be AST_Label");
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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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_validate: function() {
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if (this.TYPE == "IterationStatement") throw new Error("should not instantiate AST_IterationStatement");
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},
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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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_validate: function() {
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if (this.TYPE == "DWLoop") throw new Error("should not instantiate AST_DWLoop");
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must_be_expression(this, "condition");
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},
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}, AST_IterationStatement);
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var AST_Do = DEFNODE("Do", null, {
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$documentation: "A `do` statement",
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walk: function(visitor) {
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var node = this;
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visitor.visit(node, function() {
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node.body.walk(visitor);
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node.condition.walk(visitor);
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});
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}
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}, AST_DWLoop);
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var AST_While = DEFNODE("While", null, {
|
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$documentation: "A `while` statement",
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walk: function(visitor) {
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var node = this;
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visitor.visit(node, function() {
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node.condition.walk(visitor);
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node.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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var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.init) node.init.walk(visitor);
|
|
if (node.condition) node.condition.walk(visitor);
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|
if (node.step) node.step.walk(visitor);
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|
node.body.walk(visitor);
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});
|
|
},
|
|
_validate: function() {
|
|
if (this.init != null) {
|
|
if (!(this.init instanceof AST_Node)) throw new Error("init must be AST_Node");
|
|
if (is_statement(this.init) && !(this.init instanceof AST_Definitions)) {
|
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throw new Error("init cannot be AST_Statement");
|
|
}
|
|
}
|
|
if (this.condition != null) must_be_expression(this, "condition");
|
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if (this.step != null) must_be_expression(this, "step");
|
|
},
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|
}, AST_IterationStatement);
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|
|
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var AST_ForEnumeration = DEFNODE("ForEnumeration", "init object", {
|
|
$documentation: "Base class for enumeration loops, i.e. `for ... in`, `for ... of` & `for await ... of`",
|
|
$propdoc: {
|
|
init: "[AST_Node] the assignment target during iteration",
|
|
object: "[AST_Node] the object to iterate over"
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.init.walk(visitor);
|
|
node.object.walk(visitor);
|
|
node.body.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "ForEnumeration") throw new Error("should not instantiate AST_ForEnumeration");
|
|
if (this.init instanceof AST_Definitions) {
|
|
if (this.init.definitions.length != 1) throw new Error("init must have single declaration");
|
|
} else {
|
|
validate_destructured(this.init, function(node) {
|
|
if (!(node instanceof AST_PropAccess || node instanceof AST_SymbolRef)) {
|
|
throw new Error("init must be assignable: " + node.TYPE);
|
|
}
|
|
});
|
|
}
|
|
must_be_expression(this, "object");
|
|
},
|
|
}, AST_IterationStatement);
|
|
|
|
var AST_ForIn = DEFNODE("ForIn", null, {
|
|
$documentation: "A `for ... in` statement",
|
|
}, AST_ForEnumeration);
|
|
|
|
var AST_ForOf = DEFNODE("ForOf", null, {
|
|
$documentation: "A `for ... of` statement",
|
|
}, AST_ForEnumeration);
|
|
|
|
var AST_ForAwaitOf = DEFNODE("ForAwaitOf", null, {
|
|
$documentation: "A `for await ... of` statement",
|
|
}, AST_ForOf);
|
|
|
|
var AST_With = DEFNODE("With", "expression", {
|
|
$documentation: "A `with` statement",
|
|
$propdoc: {
|
|
expression: "[AST_Node] the `with` expression"
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.expression.walk(visitor);
|
|
node.body.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
must_be_expression(this, "expression");
|
|
},
|
|
}, AST_StatementWithBody);
|
|
|
|
/* -----[ scope and functions ]----- */
|
|
|
|
var AST_Scope = DEFNODE("Scope", "uses_eval uses_with", {
|
|
$documentation: "Base class for all statements introducing a lexical scope",
|
|
$propdoc: {
|
|
uses_eval: "[boolean/S] tells whether this scope contains a direct call to the global `eval`",
|
|
uses_with: "[boolean/S] tells whether this scope uses the `with` statement",
|
|
},
|
|
pinned: function() {
|
|
return this.uses_eval || this.uses_with;
|
|
},
|
|
resolve: return_this,
|
|
_validate: function() {
|
|
if (this.TYPE == "Scope") throw new Error("should not instantiate AST_Scope");
|
|
},
|
|
}, AST_Block);
|
|
|
|
var AST_Toplevel = DEFNODE("Toplevel", "globals", {
|
|
$documentation: "The toplevel scope",
|
|
$propdoc: {
|
|
globals: "[Object/S] a map of name ---> SymbolDef for all undeclared names",
|
|
},
|
|
wrap: function(name) {
|
|
var body = this.body;
|
|
return parse([
|
|
"(function(exports){'$ORIG';})(typeof ",
|
|
name,
|
|
"=='undefined'?(",
|
|
name,
|
|
"={}):",
|
|
name,
|
|
");"
|
|
].join(""), {
|
|
filename: "wrap=" + JSON.stringify(name)
|
|
}).transform(new TreeTransformer(function(node) {
|
|
if (node instanceof AST_Directive && node.value == "$ORIG") {
|
|
return List.splice(body);
|
|
}
|
|
}));
|
|
},
|
|
enclose: function(args_values) {
|
|
if (typeof args_values != "string") args_values = "";
|
|
var index = args_values.indexOf(":");
|
|
if (index < 0) index = args_values.length;
|
|
var body = this.body;
|
|
return parse([
|
|
"(function(",
|
|
args_values.slice(0, index),
|
|
'){"$ORIG"})(',
|
|
args_values.slice(index + 1),
|
|
")"
|
|
].join(""), {
|
|
filename: "enclose=" + JSON.stringify(args_values)
|
|
}).transform(new TreeTransformer(function(node) {
|
|
if (node instanceof AST_Directive && node.value == "$ORIG") {
|
|
return List.splice(body);
|
|
}
|
|
}));
|
|
}
|
|
}, AST_Scope);
|
|
|
|
var AST_Lambda = DEFNODE("Lambda", "argnames length_read rest uses_arguments", {
|
|
$documentation: "Base class for functions",
|
|
$propdoc: {
|
|
argnames: "[(AST_DefaultValue|AST_Destructured|AST_SymbolFunarg)*] array of function arguments and/or destructured literals",
|
|
length_read: "[boolean/S] whether length property of this function is accessed",
|
|
rest: "[(AST_Destructured|AST_SymbolFunarg)?] rest parameter, or null if absent",
|
|
uses_arguments: "[boolean/S] whether this function accesses the arguments array",
|
|
},
|
|
each_argname: function(visit) {
|
|
var tw = new TreeWalker(function(node) {
|
|
if (node instanceof AST_DefaultValue) {
|
|
node.name.walk(tw);
|
|
return true;
|
|
}
|
|
if (node instanceof AST_DestructuredKeyVal) {
|
|
node.value.walk(tw);
|
|
return true;
|
|
}
|
|
if (node instanceof AST_SymbolFunarg) visit(node);
|
|
});
|
|
this.argnames.forEach(function(argname) {
|
|
argname.walk(tw);
|
|
});
|
|
if (this.rest) this.rest.walk(tw);
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.name) node.name.walk(visitor);
|
|
node.argnames.forEach(function(argname) {
|
|
argname.walk(visitor);
|
|
});
|
|
if (node.rest) node.rest.walk(visitor);
|
|
walk_body(node, visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "Lambda") throw new Error("should not instantiate AST_Lambda");
|
|
this.argnames.forEach(function(node) {
|
|
validate_destructured(node, function(node) {
|
|
if (!(node instanceof AST_SymbolFunarg)) throw new Error("argnames must be AST_SymbolFunarg[]");
|
|
}, true);
|
|
});
|
|
if (this.rest != null) validate_destructured(this.rest, function(node) {
|
|
if (!(node instanceof AST_SymbolFunarg)) throw new Error("rest must be AST_SymbolFunarg");
|
|
});
|
|
},
|
|
}, AST_Scope);
|
|
|
|
var AST_Accessor = DEFNODE("Accessor", null, {
|
|
$documentation: "A getter/setter function",
|
|
_validate: function() {
|
|
if (this.name != null) throw new Error("name must be null");
|
|
},
|
|
}, AST_Lambda);
|
|
|
|
var AST_LambdaExpression = DEFNODE("LambdaExpression", "inlined", {
|
|
$documentation: "Base class for function expressions",
|
|
$propdoc: {
|
|
inlined: "[boolean/S] whether this function has been inlined",
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "LambdaExpression") throw new Error("should not instantiate AST_LambdaExpression");
|
|
},
|
|
}, AST_Lambda);
|
|
|
|
function is_arrow(node) {
|
|
return node instanceof AST_Arrow || node instanceof AST_AsyncArrow;
|
|
}
|
|
|
|
function is_async(node) {
|
|
return node instanceof AST_AsyncArrow
|
|
|| node instanceof AST_AsyncDefun
|
|
|| node instanceof AST_AsyncFunction
|
|
|| node instanceof AST_AsyncGeneratorDefun
|
|
|| node instanceof AST_AsyncGeneratorFunction;
|
|
}
|
|
|
|
function is_generator(node) {
|
|
return node instanceof AST_AsyncGeneratorDefun
|
|
|| node instanceof AST_AsyncGeneratorFunction
|
|
|| node instanceof AST_GeneratorDefun
|
|
|| node instanceof AST_GeneratorFunction;
|
|
}
|
|
|
|
function walk_lambda(node, tw) {
|
|
if (is_arrow(node) && node.value) {
|
|
node.value.walk(tw);
|
|
} else {
|
|
walk_body(node, tw);
|
|
}
|
|
}
|
|
|
|
var AST_Arrow = DEFNODE("Arrow", "value", {
|
|
$documentation: "An arrow function expression",
|
|
$propdoc: {
|
|
value: "[AST_Node?] simple return expression, or null if using function body.",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.argnames.forEach(function(argname) {
|
|
argname.walk(visitor);
|
|
});
|
|
if (node.rest) node.rest.walk(visitor);
|
|
if (node.value) {
|
|
node.value.walk(visitor);
|
|
} else {
|
|
walk_body(node, visitor);
|
|
}
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.name != null) throw new Error("name must be null");
|
|
if (this.uses_arguments) throw new Error("uses_arguments must be false");
|
|
if (this.value != null) {
|
|
must_be_expression(this, "value");
|
|
if (this.body.length) throw new Error("body must be empty if value exists");
|
|
}
|
|
},
|
|
}, AST_LambdaExpression);
|
|
|
|
var AST_AsyncArrow = DEFNODE("AsyncArrow", "value", {
|
|
$documentation: "An asynchronous arrow function expression",
|
|
$propdoc: {
|
|
value: "[AST_Node?] simple return expression, or null if using function body.",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.argnames.forEach(function(argname) {
|
|
argname.walk(visitor);
|
|
});
|
|
if (node.rest) node.rest.walk(visitor);
|
|
if (node.value) {
|
|
node.value.walk(visitor);
|
|
} else {
|
|
walk_body(node, visitor);
|
|
}
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.name != null) throw new Error("name must be null");
|
|
if (this.uses_arguments) throw new Error("uses_arguments must be false");
|
|
if (this.value != null) {
|
|
must_be_expression(this, "value");
|
|
if (this.body.length) throw new Error("body must be empty if value exists");
|
|
}
|
|
},
|
|
}, AST_LambdaExpression);
|
|
|
|
var AST_AsyncFunction = DEFNODE("AsyncFunction", "name", {
|
|
$documentation: "An asynchronous function expression",
|
|
$propdoc: {
|
|
name: "[AST_SymbolLambda?] the name of this function, or null if not specified",
|
|
},
|
|
_validate: function() {
|
|
if (this.name != null) {
|
|
if (!(this.name instanceof AST_SymbolLambda)) throw new Error("name must be AST_SymbolLambda");
|
|
}
|
|
},
|
|
}, AST_LambdaExpression);
|
|
|
|
var AST_AsyncGeneratorFunction = DEFNODE("AsyncGeneratorFunction", "name", {
|
|
$documentation: "An asynchronous generator function expression",
|
|
$propdoc: {
|
|
name: "[AST_SymbolLambda?] the name of this function, or null if not specified",
|
|
},
|
|
_validate: function() {
|
|
if (this.name != null) {
|
|
if (!(this.name instanceof AST_SymbolLambda)) throw new Error("name must be AST_SymbolLambda");
|
|
}
|
|
},
|
|
}, AST_LambdaExpression);
|
|
|
|
var AST_Function = DEFNODE("Function", "name", {
|
|
$documentation: "A function expression",
|
|
$propdoc: {
|
|
name: "[AST_SymbolLambda?] the name of this function, or null if not specified",
|
|
},
|
|
_validate: function() {
|
|
if (this.name != null) {
|
|
if (!(this.name instanceof AST_SymbolLambda)) throw new Error("name must be AST_SymbolLambda");
|
|
}
|
|
},
|
|
}, AST_LambdaExpression);
|
|
|
|
var AST_GeneratorFunction = DEFNODE("GeneratorFunction", "name", {
|
|
$documentation: "A generator function expression",
|
|
$propdoc: {
|
|
name: "[AST_SymbolLambda?] the name of this function, or null if not specified",
|
|
},
|
|
_validate: function() {
|
|
if (this.name != null) {
|
|
if (!(this.name instanceof AST_SymbolLambda)) throw new Error("name must be AST_SymbolLambda");
|
|
}
|
|
},
|
|
}, AST_LambdaExpression);
|
|
|
|
var AST_LambdaDefinition = DEFNODE("LambdaDefinition", "inlined name", {
|
|
$documentation: "Base class for function definitions",
|
|
$propdoc: {
|
|
inlined: "[boolean/S] whether this function has been inlined",
|
|
name: "[AST_SymbolDefun] the name of this function",
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "LambdaDefinition") throw new Error("should not instantiate AST_LambdaDefinition");
|
|
if (!(this.name instanceof AST_SymbolDefun)) throw new Error("name must be AST_SymbolDefun");
|
|
},
|
|
}, AST_Lambda);
|
|
|
|
var AST_AsyncDefun = DEFNODE("AsyncDefun", null, {
|
|
$documentation: "An asynchronous function definition",
|
|
}, AST_LambdaDefinition);
|
|
|
|
var AST_AsyncGeneratorDefun = DEFNODE("AsyncGeneratorDefun", null, {
|
|
$documentation: "An asynchronous generator function definition",
|
|
}, AST_LambdaDefinition);
|
|
|
|
var AST_Defun = DEFNODE("Defun", null, {
|
|
$documentation: "A function definition",
|
|
}, AST_LambdaDefinition);
|
|
|
|
var AST_GeneratorDefun = DEFNODE("GeneratorDefun", null, {
|
|
$documentation: "A generator function definition",
|
|
}, AST_LambdaDefinition);
|
|
|
|
/* -----[ classes ]----- */
|
|
|
|
var AST_Class = DEFNODE("Class", "extends name properties", {
|
|
$documentation: "Base class for class literals",
|
|
$propdoc: {
|
|
extends: "[AST_Node?] the super class, or null if not specified",
|
|
properties: "[AST_ClassProperty*] array of class properties",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.name) node.name.walk(visitor);
|
|
if (node.extends) node.extends.walk(visitor);
|
|
node.properties.forEach(function(prop) {
|
|
prop.walk(visitor);
|
|
});
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "Class") throw new Error("should not instantiate AST_Class");
|
|
if (this.extends != null) must_be_expression(this, "extends");
|
|
this.properties.forEach(function(node) {
|
|
if (!(node instanceof AST_ClassProperty)) throw new Error("properties must contain AST_ClassProperty");
|
|
});
|
|
},
|
|
}, AST_BlockScope);
|
|
|
|
var AST_DefClass = DEFNODE("DefClass", null, {
|
|
$documentation: "A class definition",
|
|
$propdoc: {
|
|
name: "[AST_SymbolDefClass] the name of this class",
|
|
},
|
|
_validate: function() {
|
|
if (!(this.name instanceof AST_SymbolDefClass)) throw new Error("name must be AST_SymbolDefClass");
|
|
},
|
|
}, AST_Class);
|
|
|
|
var AST_ClassExpression = DEFNODE("ClassExpression", null, {
|
|
$documentation: "A class expression",
|
|
$propdoc: {
|
|
name: "[AST_SymbolClass?] the name of this class, or null if not specified",
|
|
},
|
|
_validate: function() {
|
|
if (this.name != null) {
|
|
if (!(this.name instanceof AST_SymbolClass)) throw new Error("name must be AST_SymbolClass");
|
|
}
|
|
},
|
|
}, AST_Class);
|
|
|
|
var AST_ClassProperty = DEFNODE("ClassProperty", "key private static value", {
|
|
$documentation: "Base class for `class` properties",
|
|
$propdoc: {
|
|
key: "[string|AST_Node] property name (AST_Node for computed property)",
|
|
private: "[boolean] whether this is a private property",
|
|
static: "[boolean] whether this is a static property",
|
|
value: "[AST_Node?] property value (AST_Accessor for getters/setters, AST_LambdaExpression for methods, null if not specified for fields)",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.key instanceof AST_Node) node.key.walk(visitor);
|
|
if (node.value) node.value.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "ClassProperty") throw new Error("should not instantiate AST_ClassProperty");
|
|
if (typeof this.key != "string") {
|
|
if (!(this.key instanceof AST_Node)) throw new Error("key must be string or AST_Node");
|
|
must_be_expression(this, "key");
|
|
}
|
|
if(this.value != null) {
|
|
if (!(this.value instanceof AST_Node)) throw new Error("value must be AST_Node");
|
|
}
|
|
},
|
|
});
|
|
|
|
var AST_ClassField = DEFNODE("ClassField", null, {
|
|
$documentation: "A `class` field",
|
|
_validate: function() {
|
|
if(this.value != null) must_be_expression(this, "value");
|
|
},
|
|
}, AST_ClassProperty);
|
|
|
|
var AST_ClassGetter = DEFNODE("ClassGetter", null, {
|
|
$documentation: "A `class` getter",
|
|
_validate: function() {
|
|
if (!(this.value instanceof AST_Accessor)) throw new Error("value must be AST_Accessor");
|
|
},
|
|
}, AST_ClassProperty);
|
|
|
|
var AST_ClassSetter = DEFNODE("ClassSetter", null, {
|
|
$documentation: "A `class` setter",
|
|
_validate: function() {
|
|
if (!(this.value instanceof AST_Accessor)) throw new Error("value must be AST_Accessor");
|
|
},
|
|
}, AST_ClassProperty);
|
|
|
|
var AST_ClassMethod = DEFNODE("ClassMethod", null, {
|
|
$documentation: "A `class` method",
|
|
_validate: function() {
|
|
if (!(this.value instanceof AST_LambdaExpression)) throw new Error("value must be AST_LambdaExpression");
|
|
if (is_arrow(this.value)) throw new Error("value cannot be AST_Arrow or AST_AsyncArrow");
|
|
if (this.value.name != null) throw new Error("name of class method's lambda must be null");
|
|
},
|
|
}, AST_ClassProperty);
|
|
|
|
/* -----[ JUMPS ]----- */
|
|
|
|
var AST_Jump = DEFNODE("Jump", null, {
|
|
$documentation: "Base class for “jumps” (for now that's `return`, `throw`, `break` and `continue`)",
|
|
_validate: function() {
|
|
if (this.TYPE == "Jump") throw new Error("should not instantiate AST_Jump");
|
|
},
|
|
}, 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) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.value) node.value.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "Exit") throw new Error("should not instantiate AST_Exit");
|
|
},
|
|
}, AST_Jump);
|
|
|
|
var AST_Return = DEFNODE("Return", null, {
|
|
$documentation: "A `return` statement",
|
|
_validate: function() {
|
|
if (this.value != null) must_be_expression(this, "value");
|
|
},
|
|
}, AST_Exit);
|
|
|
|
var AST_Throw = DEFNODE("Throw", null, {
|
|
$documentation: "A `throw` statement",
|
|
_validate: function() {
|
|
must_be_expression(this, "value");
|
|
},
|
|
}, 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) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.label) node.label.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "LoopControl") throw new Error("should not instantiate AST_LoopControl");
|
|
if (this.label != null) {
|
|
if (!(this.label instanceof AST_LabelRef)) throw new Error("label must be AST_LabelRef");
|
|
}
|
|
},
|
|
}, 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) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.condition.walk(visitor);
|
|
node.body.walk(visitor);
|
|
if (node.alternative) node.alternative.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
must_be_expression(this, "condition");
|
|
if (this.alternative != null) {
|
|
if (!is_statement(this.alternative)) throw new Error("alternative must be AST_Statement");
|
|
}
|
|
},
|
|
}, AST_StatementWithBody);
|
|
|
|
/* -----[ SWITCH ]----- */
|
|
|
|
var AST_Switch = DEFNODE("Switch", "expression", {
|
|
$documentation: "A `switch` statement",
|
|
$propdoc: {
|
|
expression: "[AST_Node] the `switch` “discriminant”"
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.expression.walk(visitor);
|
|
walk_body(node, visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
must_be_expression(this, "expression");
|
|
this.body.forEach(function(node) {
|
|
if (!(node instanceof AST_SwitchBranch)) throw new Error("body must be AST_SwitchBranch[]");
|
|
});
|
|
},
|
|
}, AST_Block);
|
|
|
|
var AST_SwitchBranch = DEFNODE("SwitchBranch", null, {
|
|
$documentation: "Base class for `switch` branches",
|
|
_validate: function() {
|
|
if (this.TYPE == "SwitchBranch") throw new Error("should not instantiate AST_SwitchBranch");
|
|
},
|
|
}, 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) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.expression.walk(visitor);
|
|
walk_body(node, visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
must_be_expression(this, "expression");
|
|
},
|
|
}, 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) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
walk_body(node, visitor);
|
|
if (node.bcatch) node.bcatch.walk(visitor);
|
|
if (node.bfinally) node.bfinally.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.bcatch != null) {
|
|
if (!(this.bcatch instanceof AST_Catch)) throw new Error("bcatch must be AST_Catch");
|
|
}
|
|
if (this.bfinally != null) {
|
|
if (!(this.bfinally instanceof AST_Finally)) throw new Error("bfinally must be AST_Finally");
|
|
}
|
|
},
|
|
}, AST_Block);
|
|
|
|
var AST_Catch = DEFNODE("Catch", "argname", {
|
|
$documentation: "A `catch` node; only makes sense as part of a `try` statement",
|
|
$propdoc: {
|
|
argname: "[(AST_Destructured|AST_SymbolCatch)?] symbol for the exception, or null if not present",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.argname) node.argname.walk(visitor);
|
|
walk_body(node, visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.argname != null) validate_destructured(this.argname, function(node) {
|
|
if (!(node instanceof AST_SymbolCatch)) throw new Error("argname must be AST_SymbolCatch");
|
|
});
|
|
},
|
|
}, 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) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.definitions.forEach(function(defn) {
|
|
defn.walk(visitor);
|
|
});
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "Definitions") throw new Error("should not instantiate AST_Definitions");
|
|
if (this.definitions.length < 1) throw new Error("must have at least one definition");
|
|
},
|
|
}, AST_Statement);
|
|
|
|
var AST_Const = DEFNODE("Const", null, {
|
|
$documentation: "A `const` statement",
|
|
_validate: function() {
|
|
this.definitions.forEach(function(node) {
|
|
if (!(node instanceof AST_VarDef)) throw new Error("definitions must be AST_VarDef[]");
|
|
validate_destructured(node.name, function(node) {
|
|
if (!(node instanceof AST_SymbolConst)) throw new Error("name must be AST_SymbolConst");
|
|
});
|
|
});
|
|
},
|
|
}, AST_Definitions);
|
|
|
|
var AST_Let = DEFNODE("Let", null, {
|
|
$documentation: "A `let` statement",
|
|
_validate: function() {
|
|
this.definitions.forEach(function(node) {
|
|
if (!(node instanceof AST_VarDef)) throw new Error("definitions must be AST_VarDef[]");
|
|
validate_destructured(node.name, function(node) {
|
|
if (!(node instanceof AST_SymbolLet)) throw new Error("name must be AST_SymbolLet");
|
|
});
|
|
});
|
|
},
|
|
}, AST_Definitions);
|
|
|
|
var AST_Var = DEFNODE("Var", null, {
|
|
$documentation: "A `var` statement",
|
|
_validate: function() {
|
|
this.definitions.forEach(function(node) {
|
|
if (!(node instanceof AST_VarDef)) throw new Error("definitions must be AST_VarDef[]");
|
|
validate_destructured(node.name, function(node) {
|
|
if (!(node instanceof AST_SymbolVar)) throw new Error("name must be AST_SymbolVar");
|
|
});
|
|
});
|
|
},
|
|
}, AST_Definitions);
|
|
|
|
var AST_VarDef = DEFNODE("VarDef", "name value", {
|
|
$documentation: "A variable declaration; only appears in a AST_Definitions node",
|
|
$propdoc: {
|
|
name: "[AST_Destructured|AST_SymbolVar] name of the variable",
|
|
value: "[AST_Node?] initializer, or null of there's no initializer",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.name.walk(visitor);
|
|
if (node.value) node.value.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.value != null) must_be_expression(this, "value");
|
|
},
|
|
});
|
|
|
|
/* -----[ OTHER ]----- */
|
|
|
|
var AST_ExportDeclaration = DEFNODE("ExportDeclaration", "body", {
|
|
$documentation: "An `export` statement",
|
|
$propdoc: {
|
|
body: "[AST_DefClass|AST_Definitions|AST_LambdaDefinition] the statement to export",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.body.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (!(this.body instanceof AST_DefClass
|
|
|| this.body instanceof AST_Definitions
|
|
|| this.body instanceof AST_LambdaDefinition)) {
|
|
throw new Error("body must be AST_DefClass, AST_Definitions or AST_LambdaDefinition");
|
|
}
|
|
},
|
|
}, AST_Statement);
|
|
|
|
var AST_ExportDefault = DEFNODE("ExportDefault", "body", {
|
|
$documentation: "An `export default` statement",
|
|
$propdoc: {
|
|
body: "[AST_Node] the default export",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.body.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (!(this.body instanceof AST_DefClass || this.body instanceof AST_LambdaDefinition)) {
|
|
must_be_expression(this, "body");
|
|
}
|
|
},
|
|
}, AST_Statement);
|
|
|
|
var AST_ExportForeign = DEFNODE("ExportForeign", "aliases keys path quote", {
|
|
$documentation: "An `export ... from '...'` statement",
|
|
$propdoc: {
|
|
aliases: "[string*] array of aliases to export",
|
|
keys: "[string*] array of keys to import",
|
|
path: "[string] the path to import module",
|
|
quote: "[string?] the original quote character",
|
|
},
|
|
_validate: function() {
|
|
if (this.aliases.length != this.keys.length) {
|
|
throw new Error("aliases:key length mismatch: " + this.aliases.length + " != " + this.keys.length);
|
|
}
|
|
this.aliases.forEach(function(name) {
|
|
if (typeof name != "string") throw new Error("aliases must contain string");
|
|
});
|
|
this.keys.forEach(function(name) {
|
|
if (typeof name != "string") throw new Error("keys must contain string");
|
|
});
|
|
if (typeof this.path != "string") throw new Error("path must be string");
|
|
if (this.quote != null) {
|
|
if (typeof this.quote != "string") throw new Error("quote must be string");
|
|
if (!/^["']$/.test(this.quote)) throw new Error("invalid quote: " + this.quote);
|
|
}
|
|
},
|
|
}, AST_Statement);
|
|
|
|
var AST_ExportReferences = DEFNODE("ExportReferences", "properties", {
|
|
$documentation: "An `export { ... }` statement",
|
|
$propdoc: {
|
|
properties: "[AST_SymbolExport*] array of aliases to export",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.properties.forEach(function(prop) {
|
|
prop.walk(visitor);
|
|
});
|
|
});
|
|
},
|
|
_validate: function() {
|
|
this.properties.forEach(function(prop) {
|
|
if (!(prop instanceof AST_SymbolExport)) throw new Error("properties must contain AST_SymbolExport");
|
|
});
|
|
},
|
|
}, AST_Statement);
|
|
|
|
var AST_Import = DEFNODE("Import", "all default path properties quote", {
|
|
$documentation: "An `import` statement",
|
|
$propdoc: {
|
|
all: "[AST_SymbolImport?] the imported namespace, or null if not specified",
|
|
default: "[AST_SymbolImport?] the alias for default `export`, or null if not specified",
|
|
path: "[string] the path to import module",
|
|
properties: "[(AST_SymbolImport*)?] array of aliases, or null if not specified",
|
|
quote: "[string?] the original quote character",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.all) node.all.walk(visitor);
|
|
if (node.default) node.default.walk(visitor);
|
|
if (node.properties) node.properties.forEach(function(prop) {
|
|
prop.walk(visitor);
|
|
});
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.all != null) {
|
|
if (!(this.all instanceof AST_SymbolImport)) throw new Error("all must be AST_SymbolImport");
|
|
if (this.properties != null) throw new Error("cannot import both * and {} in the same statement");
|
|
}
|
|
if (this.default != null) {
|
|
if (!(this.default instanceof AST_SymbolImport)) throw new Error("default must be AST_SymbolImport");
|
|
if (this.default.key !== "") throw new Error("invalid default key: " + this.default.key);
|
|
}
|
|
if (typeof this.path != "string") throw new Error("path must be string");
|
|
if (this.properties != null) this.properties.forEach(function(node) {
|
|
if (!(node instanceof AST_SymbolImport)) throw new Error("properties must contain AST_SymbolImport");
|
|
});
|
|
if (this.quote != null) {
|
|
if (typeof this.quote != "string") throw new Error("quote must be string");
|
|
if (!/^["']$/.test(this.quote)) throw new Error("invalid quote: " + this.quote);
|
|
}
|
|
},
|
|
}, AST_Statement);
|
|
|
|
var AST_DefaultValue = DEFNODE("DefaultValue", "name value", {
|
|
$documentation: "A default value declaration",
|
|
$propdoc: {
|
|
name: "[AST_Destructured|AST_SymbolDeclaration] name of the variable",
|
|
value: "[AST_Node] value to assign if variable is `undefined`",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.name.walk(visitor);
|
|
node.value.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
must_be_expression(this, "value");
|
|
},
|
|
});
|
|
|
|
function must_be_expressions(node, prop, allow_spread, allow_hole) {
|
|
node[prop].forEach(function(node) {
|
|
validate_expression(node, prop, true, allow_spread, allow_hole);
|
|
});
|
|
}
|
|
|
|
var AST_Call = DEFNODE("Call", "expression args pure", {
|
|
$documentation: "A function call expression",
|
|
$propdoc: {
|
|
expression: "[AST_Node] expression to invoke as function",
|
|
args: "[AST_Node*] array of arguments"
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.expression.walk(visitor);
|
|
node.args.forEach(function(arg) {
|
|
arg.walk(visitor);
|
|
});
|
|
});
|
|
},
|
|
_validate: function() {
|
|
must_be_expression(this, "expression");
|
|
must_be_expressions(this, "args", true);
|
|
},
|
|
});
|
|
|
|
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) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.expressions.forEach(function(expr) {
|
|
expr.walk(visitor);
|
|
});
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.expressions.length < 2) throw new Error("expressions must contain multiple elements");
|
|
must_be_expressions(this, "expressions");
|
|
},
|
|
});
|
|
|
|
var AST_PropAccess = DEFNODE("PropAccess", "expression property", {
|
|
$documentation: "Base class for property access expressions, i.e. `a.foo` or `a[\"foo\"]`",
|
|
$propdoc: {
|
|
expression: "[AST_Node] the “container” expression",
|
|
property: "[AST_Node|string] the property to access. For AST_Dot this is always a plain string, while for AST_Sub it's an arbitrary AST_Node"
|
|
},
|
|
getProperty: function() {
|
|
var p = this.property;
|
|
if (p instanceof AST_Constant) {
|
|
return p.value;
|
|
}
|
|
if (p instanceof AST_UnaryPrefix
|
|
&& p.operator == "void"
|
|
&& p.expression instanceof AST_Constant) {
|
|
return;
|
|
}
|
|
return p;
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "PropAccess") throw new Error("should not instantiate AST_PropAccess");
|
|
must_be_expression(this, "expression");
|
|
},
|
|
});
|
|
|
|
var AST_Dot = DEFNODE("Dot", null, {
|
|
$documentation: "A dotted property access expression",
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.expression.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (typeof this.property != "string") throw new Error("property must be string");
|
|
},
|
|
}, AST_PropAccess);
|
|
|
|
var AST_Sub = DEFNODE("Sub", null, {
|
|
$documentation: "Index-style property access, i.e. `a[\"foo\"]`",
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.expression.walk(visitor);
|
|
node.property.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
must_be_expression(this, "property");
|
|
},
|
|
}, AST_PropAccess);
|
|
|
|
var AST_Spread = DEFNODE("Spread", "expression", {
|
|
$documentation: "Spread expression in array/object literals or function calls",
|
|
$propdoc: {
|
|
expression: "[AST_Node] expression to be expanded",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.expression.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
must_be_expression(this, "expression");
|
|
},
|
|
});
|
|
|
|
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) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.expression.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "Unary") throw new Error("should not instantiate AST_Unary");
|
|
if (typeof this.operator != "string") throw new Error("operator must be string");
|
|
must_be_expression(this, "expression");
|
|
},
|
|
});
|
|
|
|
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) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.left.walk(visitor);
|
|
node.right.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (!(this instanceof AST_Assign)) must_be_expression(this, "left");
|
|
if (typeof this.operator != "string") throw new Error("operator must be string");
|
|
must_be_expression(this, "right");
|
|
},
|
|
});
|
|
|
|
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) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.condition.walk(visitor);
|
|
node.consequent.walk(visitor);
|
|
node.alternative.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
must_be_expression(this, "condition");
|
|
must_be_expression(this, "consequent");
|
|
must_be_expression(this, "alternative");
|
|
},
|
|
});
|
|
|
|
var AST_Assign = DEFNODE("Assign", null, {
|
|
$documentation: "An assignment expression — `a = b + 5`",
|
|
_validate: function() {
|
|
if (this.operator.indexOf("=") < 0) throw new Error('operator must contain "="');
|
|
if (this.left instanceof AST_Destructured) {
|
|
if (this.operator != "=") throw new Error("invalid destructuring operator: " + this.operator);
|
|
validate_destructured(this.left, function(node) {
|
|
if (!(node instanceof AST_PropAccess || node instanceof AST_SymbolRef)) {
|
|
throw new Error("left must be assignable: " + node.TYPE);
|
|
}
|
|
});
|
|
}
|
|
},
|
|
}, AST_Binary);
|
|
|
|
var AST_Await = DEFNODE("Await", "expression", {
|
|
$documentation: "An await expression",
|
|
$propdoc: {
|
|
expression: "[AST_Node] expression with Promise to resolve on",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.expression.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
must_be_expression(this, "expression");
|
|
},
|
|
});
|
|
|
|
var AST_Yield = DEFNODE("Yield", "expression nested", {
|
|
$documentation: "A yield expression",
|
|
$propdoc: {
|
|
expression: "[AST_Node?] return value for iterator, or null if undefined",
|
|
nested: "[boolean] whether to iterate over expression as generator",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.expression) node.expression.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.expression != null) {
|
|
must_be_expression(this, "expression");
|
|
} else if (this.nested) {
|
|
throw new Error("yield* must contain expression");
|
|
}
|
|
},
|
|
});
|
|
|
|
/* -----[ LITERALS ]----- */
|
|
|
|
var AST_Array = DEFNODE("Array", "elements", {
|
|
$documentation: "An array literal",
|
|
$propdoc: {
|
|
elements: "[AST_Node*] array of elements"
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.elements.forEach(function(element) {
|
|
element.walk(visitor);
|
|
});
|
|
});
|
|
},
|
|
_validate: function() {
|
|
must_be_expressions(this, "elements", true, true);
|
|
},
|
|
});
|
|
|
|
var AST_Destructured = DEFNODE("Destructured", "rest", {
|
|
$documentation: "Base class for destructured literal",
|
|
$propdoc: {
|
|
rest: "[(AST_Destructured|AST_SymbolDeclaration|AST_SymbolRef)?] rest parameter, or null if absent",
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "Destructured") throw new Error("should not instantiate AST_Destructured");
|
|
},
|
|
});
|
|
|
|
function validate_destructured(node, check, allow_default) {
|
|
if (node instanceof AST_DefaultValue && allow_default) return validate_destructured(node.name, check);
|
|
if (node instanceof AST_Destructured) {
|
|
if (node.rest != null) validate_destructured(node.rest, check);
|
|
if (node instanceof AST_DestructuredArray) return node.elements.forEach(function(node) {
|
|
if (!(node instanceof AST_Hole)) validate_destructured(node, check, true);
|
|
});
|
|
if (node instanceof AST_DestructuredObject) return node.properties.forEach(function(prop) {
|
|
validate_destructured(prop.value, check, true);
|
|
});
|
|
}
|
|
check(node);
|
|
}
|
|
|
|
var AST_DestructuredArray = DEFNODE("DestructuredArray", "elements", {
|
|
$documentation: "A destructured array literal",
|
|
$propdoc: {
|
|
elements: "[(AST_DefaultValue|AST_Destructured|AST_SymbolDeclaration|AST_SymbolRef)*] array of elements",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.elements.forEach(function(element) {
|
|
element.walk(visitor);
|
|
});
|
|
if (node.rest) node.rest.walk(visitor);
|
|
});
|
|
},
|
|
}, AST_Destructured);
|
|
|
|
var AST_DestructuredKeyVal = DEFNODE("DestructuredKeyVal", "key value", {
|
|
$documentation: "A key: value destructured property",
|
|
$propdoc: {
|
|
key: "[string|AST_Node] property name. For computed property this is an AST_Node.",
|
|
value: "[AST_DefaultValue|AST_Destructured|AST_SymbolDeclaration|AST_SymbolRef] property value",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.key instanceof AST_Node) node.key.walk(visitor);
|
|
node.value.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (typeof this.key != "string") {
|
|
if (!(this.key instanceof AST_Node)) throw new Error("key must be string or AST_Node");
|
|
must_be_expression(this, "key");
|
|
}
|
|
if (!(this.value instanceof AST_Node)) throw new Error("value must be AST_Node");
|
|
},
|
|
});
|
|
|
|
var AST_DestructuredObject = DEFNODE("DestructuredObject", "properties", {
|
|
$documentation: "A destructured object literal",
|
|
$propdoc: {
|
|
properties: "[AST_DestructuredKeyVal*] array of properties",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.properties.forEach(function(prop) {
|
|
prop.walk(visitor);
|
|
});
|
|
if (node.rest) node.rest.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
this.properties.forEach(function(node) {
|
|
if (!(node instanceof AST_DestructuredKeyVal)) throw new Error("properties must be AST_DestructuredKeyVal[]");
|
|
});
|
|
},
|
|
}, AST_Destructured);
|
|
|
|
var AST_Object = DEFNODE("Object", "properties", {
|
|
$documentation: "An object literal",
|
|
$propdoc: {
|
|
properties: "[(AST_ObjectProperty|AST_Spread)*] array of properties"
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
node.properties.forEach(function(prop) {
|
|
prop.walk(visitor);
|
|
});
|
|
});
|
|
},
|
|
_validate: function() {
|
|
this.properties.forEach(function(node) {
|
|
if (!(node instanceof AST_ObjectProperty || node instanceof AST_Spread)) {
|
|
throw new Error("properties must contain AST_ObjectProperty and/or AST_Spread only");
|
|
}
|
|
});
|
|
},
|
|
});
|
|
|
|
var AST_ObjectProperty = DEFNODE("ObjectProperty", "key value", {
|
|
$documentation: "Base class for literal object properties",
|
|
$propdoc: {
|
|
key: "[string|AST_Node] property name. For computed property this is an AST_Node.",
|
|
value: "[AST_Node] property value. For getters and setters this is an AST_Accessor.",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.key instanceof AST_Node) node.key.walk(visitor);
|
|
node.value.walk(visitor);
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "ObjectProperty") throw new Error("should not instantiate AST_ObjectProperty");
|
|
if (typeof this.key != "string") {
|
|
if (!(this.key instanceof AST_Node)) throw new Error("key must be string or AST_Node");
|
|
must_be_expression(this, "key");
|
|
}
|
|
if (!(this.value instanceof AST_Node)) throw new Error("value must be AST_Node");
|
|
},
|
|
});
|
|
|
|
var AST_ObjectKeyVal = DEFNODE("ObjectKeyVal", null, {
|
|
$documentation: "A key: value object property",
|
|
_validate: function() {
|
|
must_be_expression(this, "value");
|
|
},
|
|
}, AST_ObjectProperty);
|
|
|
|
var AST_ObjectMethod = DEFNODE("ObjectMethod", null, {
|
|
$documentation: "A key(){} object property",
|
|
_validate: function() {
|
|
if (!(this.value instanceof AST_LambdaExpression)) throw new Error("value must be AST_LambdaExpression");
|
|
if (is_arrow(this.value)) throw new Error("value cannot be AST_Arrow or AST_AsyncArrow");
|
|
if (this.value.name != null) throw new Error("name of class method's lambda must be null");
|
|
},
|
|
}, AST_ObjectKeyVal);
|
|
|
|
var AST_ObjectSetter = DEFNODE("ObjectSetter", null, {
|
|
$documentation: "An object setter property",
|
|
_validate: function() {
|
|
if (!(this.value instanceof AST_Accessor)) throw new Error("value must be AST_Accessor");
|
|
},
|
|
}, AST_ObjectProperty);
|
|
|
|
var AST_ObjectGetter = DEFNODE("ObjectGetter", null, {
|
|
$documentation: "An object getter property",
|
|
_validate: function() {
|
|
if (!(this.value instanceof AST_Accessor)) throw new Error("value must be AST_Accessor");
|
|
},
|
|
}, AST_ObjectProperty);
|
|
|
|
var AST_Symbol = DEFNODE("Symbol", "scope name thedef", {
|
|
$documentation: "Base class for all symbols",
|
|
$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"
|
|
},
|
|
_validate: function() {
|
|
if (this.TYPE == "Symbol") throw new Error("should not instantiate AST_Symbol");
|
|
if (typeof this.name != "string") throw new Error("name must be string");
|
|
},
|
|
});
|
|
|
|
var AST_SymbolDeclaration = DEFNODE("SymbolDeclaration", "init", {
|
|
$documentation: "A declaration symbol (symbol in var, function name or argument, symbol in catch)",
|
|
}, AST_Symbol);
|
|
|
|
var AST_SymbolConst = DEFNODE("SymbolConst", null, {
|
|
$documentation: "Symbol defining a constant",
|
|
}, AST_SymbolDeclaration);
|
|
|
|
var AST_SymbolImport = DEFNODE("SymbolImport", "key", {
|
|
$documentation: "Symbol defined by an `import` statement",
|
|
$propdoc: {
|
|
key: "[string] the original `export` name",
|
|
},
|
|
_validate: function() {
|
|
if (typeof this.key != "string") throw new Error("key must be string");
|
|
},
|
|
}, AST_SymbolConst);
|
|
|
|
var AST_SymbolLet = DEFNODE("SymbolLet", null, {
|
|
$documentation: "Symbol defining a lexical-scoped variable",
|
|
}, AST_SymbolDeclaration);
|
|
|
|
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_SymbolDefClass = DEFNODE("SymbolDefClass", null, {
|
|
$documentation: "Symbol defining a class",
|
|
}, AST_SymbolLet);
|
|
|
|
var AST_SymbolClass = DEFNODE("SymbolClass", null, {
|
|
$documentation: "Symbol naming a class expression",
|
|
}, AST_SymbolLet);
|
|
|
|
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 in_arg redef", {
|
|
$documentation: "Reference to some symbol (not definition/declaration)",
|
|
}, AST_Symbol);
|
|
|
|
var AST_SymbolExport = DEFNODE("SymbolExport", "alias", {
|
|
$documentation: "Reference in an `export` statement",
|
|
$propdoc: {
|
|
alias: "[string] the `export` alias",
|
|
},
|
|
_validate: function() {
|
|
if (typeof this.alias != "string") throw new Error("alias must be string");
|
|
},
|
|
}, AST_SymbolRef);
|
|
|
|
var AST_LabelRef = DEFNODE("LabelRef", null, {
|
|
$documentation: "Reference to a label symbol",
|
|
}, AST_Symbol);
|
|
|
|
var AST_ObjectIdentity = DEFNODE("ObjectIdentity", null, {
|
|
$documentation: "Base class for `super` & `this`",
|
|
_validate: function() {
|
|
if (this.TYPE == "ObjectIdentity") throw new Error("should not instantiate AST_ObjectIdentity");
|
|
},
|
|
}, AST_Symbol);
|
|
|
|
var AST_Super = DEFNODE("Super", null, {
|
|
$documentation: "The `super` symbol",
|
|
_validate: function() {
|
|
if (this.name !== "super") throw new Error('name must be "super"');
|
|
},
|
|
}, AST_ObjectIdentity);
|
|
|
|
var AST_This = DEFNODE("This", null, {
|
|
$documentation: "The `this` symbol",
|
|
_validate: function() {
|
|
if (this.TYPE == "This" && this.name !== "this") throw new Error('name must be "this"');
|
|
},
|
|
}, AST_ObjectIdentity);
|
|
|
|
var AST_NewTarget = DEFNODE("NewTarget", null, {
|
|
$documentation: "The `new.target` symbol",
|
|
_validate: function() {
|
|
if (this.name !== "new.target") throw new Error('name must be "new.target": ' + this.name);
|
|
},
|
|
}, AST_This);
|
|
|
|
var AST_Template = DEFNODE("Template", "expressions strings tag", {
|
|
$documentation: "A template literal, i.e. tag`str1${expr1}...strN${exprN}strN+1`",
|
|
$propdoc: {
|
|
expressions: "[AST_Node*] the placeholder expressions",
|
|
strings: "[string*] the raw text segments",
|
|
tag: "[AST_Node] tag function, or null if absent",
|
|
},
|
|
walk: function(visitor) {
|
|
var node = this;
|
|
visitor.visit(node, function() {
|
|
if (node.tag) node.tag.walk(visitor);
|
|
node.expressions.forEach(function(expr) {
|
|
expr.walk(visitor);
|
|
});
|
|
});
|
|
},
|
|
_validate: function() {
|
|
if (this.expressions.length + 1 != this.strings.length) {
|
|
throw new Error("malformed template with " + this.expressions.length + " placeholder(s) but " + this.strings.length + " text segment(s)");
|
|
}
|
|
must_be_expressions(this, "expressions");
|
|
this.strings.forEach(function(string) {
|
|
if (typeof string != "string") throw new Error("strings must contain string");
|
|
});
|
|
if (this.tag != null) must_be_expression(this, "tag");
|
|
},
|
|
});
|
|
|
|
var AST_Constant = DEFNODE("Constant", null, {
|
|
$documentation: "Base class for all constants",
|
|
_validate: function() {
|
|
if (this.TYPE == "Constant") throw new Error("should not instantiate AST_Constant");
|
|
},
|
|
});
|
|
|
|
var AST_String = DEFNODE("String", "quote value", {
|
|
$documentation: "A string literal",
|
|
$propdoc: {
|
|
quote: "[string?] the original quote character",
|
|
value: "[string] the contents of this string",
|
|
},
|
|
_validate: function() {
|
|
if (this.quote != null) {
|
|
if (typeof this.quote != "string") throw new Error("quote must be string");
|
|
if (!/^["']$/.test(this.quote)) throw new Error("invalid quote: " + this.quote);
|
|
}
|
|
if (typeof this.value != "string") throw new Error("value must be string");
|
|
},
|
|
}, AST_Constant);
|
|
|
|
var AST_Number = DEFNODE("Number", "value", {
|
|
$documentation: "A number literal",
|
|
$propdoc: {
|
|
value: "[number] the numeric value",
|
|
},
|
|
_validate: function() {
|
|
if (typeof this.value != "number") throw new Error("value must be number");
|
|
if (!isFinite(this.value)) throw new Error("value must be finite");
|
|
if (this.value < 0) throw new Error("value cannot be negative");
|
|
},
|
|
}, AST_Constant);
|
|
|
|
var AST_BigInt = DEFNODE("BigInt", "value", {
|
|
$documentation: "A BigInt literal",
|
|
$propdoc: {
|
|
value: "[string] the numeric representation",
|
|
},
|
|
_validate: function() {
|
|
if (typeof this.value != "string") throw new Error("value must be string");
|
|
if (this.value[0] == "-") throw new Error("value cannot be negative");
|
|
},
|
|
}, AST_Constant);
|
|
|
|
var AST_RegExp = DEFNODE("RegExp", "value", {
|
|
$documentation: "A regexp literal",
|
|
$propdoc: {
|
|
value: "[RegExp] the actual regexp"
|
|
},
|
|
_validate: function() {
|
|
if (!(this.value instanceof RegExp)) throw new Error("value must be RegExp");
|
|
},
|
|
}, AST_Constant);
|
|
|
|
var AST_Atom = DEFNODE("Atom", null, {
|
|
$documentation: "Base class for atoms",
|
|
_validate: function() {
|
|
if (this.TYPE == "Atom") throw new Error("should not instantiate AST_Atom");
|
|
},
|
|
}, 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",
|
|
_validate: function() {
|
|
if (this.TYPE == "Boolean") throw new Error("should not instantiate AST_Boolean");
|
|
},
|
|
}, 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.callback = callback;
|
|
this.directives = Object.create(null);
|
|
this.stack = [];
|
|
}
|
|
TreeWalker.prototype = {
|
|
visit: function(node, descend) {
|
|
this.push(node);
|
|
var done = this.callback(node, descend || noop);
|
|
if (!done && descend) descend();
|
|
this.pop();
|
|
},
|
|
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() {
|
|
var node = this.stack.pop();
|
|
if (node instanceof AST_Lambda) {
|
|
this.directives = Object.getPrototypeOf(this.directives);
|
|
}
|
|
},
|
|
self: function() {
|
|
return this.stack[this.stack.length - 1];
|
|
},
|
|
find_parent: function(type) {
|
|
var stack = this.stack;
|
|
for (var i = stack.length; --i >= 0;) {
|
|
var x = stack[i];
|
|
if (x instanceof type) return x;
|
|
}
|
|
},
|
|
has_directive: function(type) {
|
|
var dir = this.directives[type];
|
|
if (dir) return dir;
|
|
var node = this.stack[this.stack.length - 1];
|
|
if (node instanceof AST_Scope) {
|
|
for (var i = 0; i < node.body.length; ++i) {
|
|
var st = node.body[i];
|
|
if (!(st instanceof AST_Directive)) break;
|
|
if (st.value == type) return st;
|
|
}
|
|
}
|
|
},
|
|
loopcontrol_target: function(node) {
|
|
var stack = this.stack;
|
|
if (node.label) for (var i = stack.length; --i >= 0;) {
|
|
var x = stack[i];
|
|
if (x instanceof AST_LabeledStatement && x.label.name == node.label.name)
|
|
return x.body;
|
|
} else for (var i = stack.length; --i >= 0;) {
|
|
var x = stack[i];
|
|
if (x instanceof AST_IterationStatement
|
|
|| node instanceof AST_Break && x instanceof AST_Switch)
|
|
return x;
|
|
}
|
|
},
|
|
in_boolean_context: function() {
|
|
var self = this.self();
|
|
for (var i = 0, p; p = this.parent(i); i++) {
|
|
if (p instanceof AST_Conditional && p.condition === self
|
|
|| p instanceof AST_DWLoop && p.condition === self
|
|
|| p instanceof AST_For && p.condition === self
|
|
|| p instanceof AST_If && p.condition === self
|
|
|| p instanceof AST_Return && p.in_bool
|
|
|| p instanceof AST_Sequence && p.tail_node() !== self
|
|
|| p instanceof AST_SimpleStatement
|
|
|| p instanceof AST_UnaryPrefix && p.operator == "!" && p.expression === self) {
|
|
return true;
|
|
}
|
|
if (p instanceof AST_Binary && (p.operator == "&&" || p.operator == "||")
|
|
|| p instanceof AST_Conditional
|
|
|| p.tail_node() === self) {
|
|
self = p;
|
|
} else if (p instanceof AST_Return) {
|
|
for (var call, fn = p; call = this.parent(++i); fn = call) {
|
|
if (call.TYPE == "Call") {
|
|
if (!(fn instanceof AST_Lambda) || fn.name) return false;
|
|
} else if (fn instanceof AST_Lambda) {
|
|
return false;
|
|
}
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
};
|