Add rollup-plugin-minify-html-template-literals to node_modules
R=jacktfranklin@chromium.org
Bug: 1213034
Change-Id: I5da8225f60b53870a1c67d6b5d02a464c08f4eb2
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2917088
Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
diff --git a/node_modules/uglify-js/lib/ast.js b/node_modules/uglify-js/lib/ast.js
new file mode 100644
index 0000000..590c09b
--- /dev/null
+++ b/node_modules/uglify-js/lib/ast.js
@@ -0,0 +1,2064 @@
+/***********************************************************************
+
+ A JavaScript tokenizer / parser / beautifier / compressor.
+ https://github.com/mishoo/UglifyJS
+
+ -------------------------------- (C) ---------------------------------
+
+ Author: Mihai Bazon
+ <mihai.bazon@gmail.com>
+ http://mihai.bazon.net/blog
+
+ Distributed under the BSD license:
+
+ Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ * Redistributions of source code must retain the above
+ copyright notice, this list of conditions and the following
+ disclaimer.
+
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following
+ disclaimer in the documentation and/or other materials
+ provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+ EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+ LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ SUCH DAMAGE.
+
+ ***********************************************************************/
+
+"use strict";
+
+function DEFNODE(type, props, methods, base) {
+ if (typeof base === "undefined") base = AST_Node;
+ props = props ? props.split(/\s+/) : [];
+ var self_props = props;
+ if (base && base.PROPS) props = props.concat(base.PROPS);
+ var code = [
+ "return function AST_", type, "(props){",
+ "if(props){",
+ ];
+ props.forEach(function(prop) {
+ code.push("this.", prop, "=props.", prop, ";");
+ });
+ code.push("}");
+ var proto = base && new base;
+ if (proto && proto.initialize || methods && methods.initialize) code.push("this.initialize();");
+ code.push("}");
+ var ctor = new Function(code.join(""))();
+ if (proto) {
+ ctor.prototype = proto;
+ ctor.BASE = base;
+ }
+ if (base) base.SUBCLASSES.push(ctor);
+ ctor.prototype.CTOR = ctor;
+ ctor.PROPS = props || null;
+ ctor.SELF_PROPS = self_props;
+ ctor.SUBCLASSES = [];
+ if (type) {
+ ctor.prototype.TYPE = ctor.TYPE = type;
+ }
+ if (methods) for (var name in methods) if (HOP(methods, name)) {
+ if (/^\$/.test(name)) {
+ ctor[name.substr(1)] = methods[name];
+ } else {
+ ctor.prototype[name] = methods[name];
+ }
+ }
+ ctor.DEFMETHOD = function(name, method) {
+ this.prototype[name] = method;
+ };
+ if (typeof exports !== "undefined") {
+ exports["AST_" + type] = ctor;
+ }
+ return ctor;
+}
+
+var AST_Token = DEFNODE("Token", "type value line col pos endline endcol endpos nlb comments_before comments_after file raw", {
+}, null);
+
+var AST_Node = DEFNODE("Node", "start end", {
+ _clone: function(deep) {
+ if (deep) {
+ var self = this.clone();
+ return self.transform(new TreeTransformer(function(node) {
+ if (node !== self) {
+ return node.clone(true);
+ }
+ }));
+ }
+ return new this.CTOR(this);
+ },
+ clone: function(deep) {
+ return this._clone(deep);
+ },
+ $documentation: "Base class of all AST nodes",
+ $propdoc: {
+ start: "[AST_Token] The first token of this node",
+ end: "[AST_Token] The last token of this node"
+ },
+ walk: function(visitor) {
+ visitor.visit(this);
+ },
+ _validate: function() {
+ if (this.TYPE == "Node") throw new Error("should not instantiate AST_Node");
+ },
+ validate: function() {
+ var ctor = this.CTOR;
+ do {
+ ctor.prototype._validate.call(this);
+ } while (ctor = ctor.BASE);
+ },
+ validate_ast: function() {
+ var marker = {};
+ this.walk(new TreeWalker(function(node) {
+ if (node.validate_visited === marker) {
+ throw new Error(string_template("cannot reuse {type} from [{file}:{line},{col}]", {
+ type: "AST_" + node.TYPE,
+ file: node.start.file,
+ line: node.start.line,
+ col: node.start.col,
+ }));
+ }
+ node.validate_visited = marker;
+ }));
+ },
+}, null);
+
+(AST_Node.log_function = function(fn, verbose) {
+ if (typeof fn != "function") {
+ AST_Node.info = AST_Node.warn = noop;
+ return;
+ }
+ var printed = Object.create(null);
+ AST_Node.info = verbose ? function(text, props) {
+ log("INFO: " + string_template(text, props));
+ } : noop;
+ AST_Node.warn = function(text, props) {
+ log("WARN: " + string_template(text, props));
+ };
+
+ function log(msg) {
+ if (printed[msg]) return;
+ printed[msg] = true;
+ fn(msg);
+ }
+})();
+
+var restore_transforms = [];
+AST_Node.enable_validation = function() {
+ AST_Node.disable_validation();
+ (function validate_transform(ctor) {
+ ctor.SUBCLASSES.forEach(validate_transform);
+ if (!HOP(ctor.prototype, "transform")) return;
+ var transform = ctor.prototype.transform;
+ ctor.prototype.transform = function(tw, in_list) {
+ var node = transform.call(this, tw, in_list);
+ if (node instanceof AST_Node) {
+ node.validate();
+ } else if (!(node === null || in_list && List.is_op(node))) {
+ throw new Error("invalid transformed value: " + node);
+ }
+ return node;
+ };
+ restore_transforms.push(function() {
+ ctor.prototype.transform = transform;
+ });
+ })(this);
+};
+
+AST_Node.disable_validation = function() {
+ var restore;
+ while (restore = restore_transforms.pop()) restore();
+};
+
+/* -----[ statements ]----- */
+
+var AST_Statement = DEFNODE("Statement", null, {
+ $documentation: "Base class of all statements",
+ _validate: function() {
+ if (this.TYPE == "Statement") throw new Error("should not instantiate AST_Statement");
+ },
+});
+
+var AST_Debugger = DEFNODE("Debugger", null, {
+ $documentation: "Represents a debugger statement",
+}, AST_Statement);
+
+var AST_Directive = DEFNODE("Directive", "quote value", {
+ $documentation: "Represents a directive, like \"use strict\";",
+ $propdoc: {
+ quote: "[string?] the original quote character",
+ value: "[string] The value of this directive as a plain string (it's not an AST_String!)",
+ },
+ _validate: function() {
+ if (this.quote != null) {
+ if (typeof this.quote != "string") throw new Error("quote must be string");
+ if (!/^["']$/.test(this.quote)) throw new Error("invalid quote: " + this.quote);
+ }
+ if (typeof this.value != "string") throw new Error("value must be string");
+ },
+}, AST_Statement);
+
+var AST_EmptyStatement = DEFNODE("EmptyStatement", null, {
+ $documentation: "The empty statement (empty block or simply a semicolon)"
+}, AST_Statement);
+
+function is_statement(node) {
+ return node instanceof AST_Statement
+ && !(node instanceof AST_ClassExpression)
+ && !(node instanceof AST_LambdaExpression);
+}
+
+function validate_expression(value, prop, multiple, allow_spread, allow_hole) {
+ multiple = multiple ? "contain" : "be";
+ if (!(value instanceof AST_Node)) throw new Error(prop + " must " + multiple + " AST_Node");
+ if (value instanceof AST_DefaultValue) throw new Error(prop + " cannot " + multiple + " AST_DefaultValue");
+ if (value instanceof AST_Destructured) throw new Error(prop + " cannot " + multiple + " AST_Destructured");
+ if (value instanceof AST_Hole && !allow_hole) throw new Error(prop + " cannot " + multiple + " AST_Hole");
+ if (value instanceof AST_Spread && !allow_spread) throw new Error(prop + " cannot " + multiple + " AST_Spread");
+ if (is_statement(value)) throw new Error(prop + " cannot " + multiple + " AST_Statement");
+ if (value instanceof AST_SymbolDeclaration) {
+ throw new Error(prop + " cannot " + multiple + " AST_SymbolDeclaration");
+ }
+}
+
+function must_be_expression(node, prop) {
+ validate_expression(node[prop], prop);
+}
+
+var AST_SimpleStatement = DEFNODE("SimpleStatement", "body", {
+ $documentation: "A statement consisting of an expression, i.e. a = 1 + 2",
+ $propdoc: {
+ body: "[AST_Node] an expression node (should not be instanceof AST_Statement)",
+ },
+ walk: function(visitor) {
+ var node = this;
+ visitor.visit(node, function() {
+ node.body.walk(visitor);
+ });
+ },
+ _validate: function() {
+ must_be_expression(this, "body");
+ },
+}, AST_Statement);
+
+var AST_BlockScope = DEFNODE("BlockScope", "enclosed functions make_def parent_scope variables", {
+ $documentation: "Base class for all statements introducing a lexical scope",
+ $propdoc: {
+ enclosed: "[SymbolDef*/S] a list of all symbol definitions that are accessed from this scope or any subscopes",
+ functions: "[Dictionary/S] like `variables`, but only lists function declarations",
+ parent_scope: "[AST_Scope?/S] link to the parent scope",
+ variables: "[Dictionary/S] a map of name ---> SymbolDef for all variables/functions defined in this scope",
+ },
+ clone: function(deep) {
+ var node = this._clone(deep);
+ if (this.enclosed) node.enclosed = this.enclosed.slice();
+ if (this.functions) node.functions = this.functions.clone();
+ if (this.variables) node.variables = this.variables.clone();
+ return node;
+ },
+ pinned: function() {
+ return this.resolve().pinned();
+ },
+ resolve: function() {
+ return this.parent_scope.resolve();
+ },
+ _validate: function() {
+ if (this.TYPE == "BlockScope") throw new Error("should not instantiate AST_BlockScope");
+ if (this.parent_scope == null) return;
+ if (!(this.parent_scope instanceof AST_BlockScope)) throw new Error("parent_scope must be AST_BlockScope");
+ if (!(this.resolve() instanceof AST_Scope)) throw new Error("must be contained within AST_Scope");
+ },
+}, AST_Statement);
+
+function walk_body(node, visitor) {
+ node.body.forEach(function(node) {
+ node.walk(visitor);
+ });
+}
+
+var AST_Block = DEFNODE("Block", "body", {
+ $documentation: "A body of statements (usually braced)",
+ $propdoc: {
+ body: "[AST_Statement*] an array of statements"
+ },
+ walk: function(visitor) {
+ var node = this;
+ visitor.visit(node, function() {
+ walk_body(node, visitor);
+ });
+ },
+ _validate: function() {
+ if (this.TYPE == "Block") throw new Error("should not instantiate AST_Block");
+ this.body.forEach(function(node) {
+ if (!is_statement(node)) throw new Error("body must contain AST_Statement");
+ });
+ },
+}, AST_BlockScope);
+
+var AST_BlockStatement = DEFNODE("BlockStatement", null, {
+ $documentation: "A block statement",
+}, AST_Block);
+
+var AST_StatementWithBody = DEFNODE("StatementWithBody", "body", {
+ $documentation: "Base class for all statements that contain one nested body: `For`, `ForIn`, `Do`, `While`, `With`",
+ $propdoc: {
+ body: "[AST_Statement] the body; this should always be present, even if it's an AST_EmptyStatement"
+ },
+ _validate: function() {
+ if (this.TYPE == "StatementWithBody") throw new Error("should not instantiate AST_StatementWithBody");
+ if (!is_statement(this.body)) throw new Error("body must be AST_Statement");
+ },
+}, AST_BlockScope);
+
+var AST_LabeledStatement = DEFNODE("LabeledStatement", "label", {
+ $documentation: "Statement with a label",
+ $propdoc: {
+ label: "[AST_Label] a label definition"
+ },
+ walk: function(visitor) {
+ var node = this;
+ visitor.visit(node, function() {
+ node.label.walk(visitor);
+ node.body.walk(visitor);
+ });
+ },
+ clone: function(deep) {
+ var node = this._clone(deep);
+ if (deep) {
+ var label = node.label;
+ var def = this.label;
+ node.walk(new TreeWalker(function(node) {
+ if (node instanceof AST_LoopControl) {
+ if (!node.label || node.label.thedef !== def) return;
+ node.label.thedef = label;
+ label.references.push(node);
+ return true;
+ }
+ if (node instanceof AST_Scope) return true;
+ }));
+ }
+ return node;
+ },
+ _validate: function() {
+ if (!(this.label instanceof AST_Label)) throw new Error("label must be AST_Label");
+ },
+}, AST_StatementWithBody);
+
+var AST_IterationStatement = DEFNODE("IterationStatement", null, {
+ $documentation: "Internal class. All loops inherit from it.",
+ _validate: function() {
+ if (this.TYPE == "IterationStatement") throw new Error("should not instantiate AST_IterationStatement");
+ },
+}, AST_StatementWithBody);
+
+var AST_DWLoop = DEFNODE("DWLoop", "condition", {
+ $documentation: "Base class for do/while statements",
+ $propdoc: {
+ condition: "[AST_Node] the loop condition. Should not be instanceof AST_Statement"
+ },
+ _validate: function() {
+ if (this.TYPE == "DWLoop") throw new Error("should not instantiate AST_DWLoop");
+ must_be_expression(this, "condition");
+ },
+}, AST_IterationStatement);
+
+var AST_Do = DEFNODE("Do", null, {
+ $documentation: "A `do` statement",
+ walk: function(visitor) {
+ var node = this;
+ visitor.visit(node, function() {
+ node.body.walk(visitor);
+ node.condition.walk(visitor);
+ });
+ }
+}, AST_DWLoop);
+
+var AST_While = DEFNODE("While", null, {
+ $documentation: "A `while` statement",
+ walk: function(visitor) {
+ var node = this;
+ visitor.visit(node, function() {
+ node.condition.walk(visitor);
+ node.body.walk(visitor);
+ });
+ }
+}, AST_DWLoop);
+
+var AST_For = DEFNODE("For", "init condition step", {
+ $documentation: "A `for` statement",
+ $propdoc: {
+ init: "[AST_Node?] the `for` initialization code, or null if empty",
+ condition: "[AST_Node?] the `for` termination clause, or null if empty",
+ step: "[AST_Node?] the `for` update clause, or null if empty"
+ },
+ walk: function(visitor) {
+ var node = this;
+ visitor.visit(node, function() {
+ if (node.init) node.init.walk(visitor);
+ if (node.condition) node.condition.walk(visitor);
+ if (node.step) node.step.walk(visitor);
+ node.body.walk(visitor);
+ });
+ },
+ _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)) {
+ throw new Error("init cannot be AST_Statement");
+ }
+ }
+ if (this.condition != null) must_be_expression(this, "condition");
+ if (this.step != null) must_be_expression(this, "step");
+ },
+}, AST_IterationStatement);
+
+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",
+ $propdoc: {
+ globals: "[Dictionary/S] a map of name ---> SymbolDef for all undeclared names",
+ },
+ wrap: function(name) {
+ var body = this.body;
+ return parse([
+ "(function(exports){'$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", "args expression optional pure", {
+ $documentation: "A function call expression",
+ $propdoc: {
+ args: "[AST_Node*] array of arguments",
+ expression: "[AST_Node] expression to invoke as function",
+ optional: "[boolean] whether the expression is optional chaining",
+ pure: "[string/S] marker for side-effect-free call expression",
+ },
+ 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",
+ _validate: function() {
+ if (this.optional) throw new Error("optional must be false");
+ },
+}, 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 optional property", {
+ $documentation: "Base class for property access expressions, i.e. `a.foo` or `a[\"foo\"]`",
+ $propdoc: {
+ expression: "[AST_Node] the “container” expression",
+ optional: "[boolean] whether the expression is optional chaining",
+ 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 object 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",
+ initialize: function() {
+ this.name = "new.target";
+ },
+ _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;
+ }
+ }
+ }
+};