diff --git a/dist/engine.bundle.js b/dist/engine.bundle.js
index 062fb6ed0..1b6606231 100644
--- a/dist/engine.bundle.js
+++ b/dist/engine.bundle.js
@@ -15454,7 +15454,7 @@ function initCreateProgramButtons() {
/* Settings.js */
let Settings = {
- CodeInstructionRunTime: 50,
+ CodeInstructionRunTime: 25,
MaxLogCapacity: 50,
MaxPortCapacity: 50,
SuppressMessages: false,
@@ -15603,7 +15603,6 @@ function setSettingsLabels() {
/* harmony import */ var _Constants__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./Constants */ 2);
/* harmony import */ var _engine__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./engine */ 6);
/* harmony import */ var _JSInterpreter__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ./JSInterpreter */ 91);
-/* harmony import */ var _JSInterpreter__WEBPACK_IMPORTED_MODULE_3___default = /*#__PURE__*/__webpack_require__.n(_JSInterpreter__WEBPACK_IMPORTED_MODULE_3__);
/* harmony import */ var _NetscriptEnvironment__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ./NetscriptEnvironment */ 81);
/* harmony import */ var _NetscriptEvaluator__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ./NetscriptEvaluator */ 7);
/* harmony import */ var _NetscriptFunctions__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ./NetscriptFunctions */ 34);
@@ -15783,7 +15782,7 @@ function startNetscript1Script(workerScript) {
var interpreterInitialization = function(int, scope) {
//Add the Netscript environment
var ns = Object(_NetscriptFunctions__WEBPACK_IMPORTED_MODULE_6__[/* NetscriptFunctions */ "a"])(workerScript);
- for (var name in ns) {
+ for (let name in ns) {
let entry = ns[name];
if (typeof entry === "function") {
//Async functions need to be wrapped. See JS-Interpreter documentation
@@ -15802,10 +15801,23 @@ function startNetscript1Script(workerScript) {
}
int.setProperty(scope, name, int.createAsyncFunction(tempWrapper));
} else {
- int.setProperty(scope, name, int.createNativeFunction(entry));
+ let tempWrapper = function() {
+ let res = entry.apply(null, arguments);
+
+ if (res == null) {
+ return res;
+ } else if (res.constructor === Array || (res === Object(res))) {
+ //Objects and Arrays must be converted to the interpreter's format
+ console.log("Function returning object detected: " + name);
+ return int.nativeToPseudo(res);
+ } else {
+ return res;
+ }
+ }
+ int.setProperty(scope, name, int.createNativeFunction(tempWrapper));
}
} else {
- //Math, Date, Number, hacknetnodes, bladeburner
+ //bladeburner, or anything else
int.setProperty(scope, name, int.nativeToPseudo(entry));
}
}
@@ -15813,7 +15825,16 @@ function startNetscript1Script(workerScript) {
//Add the arguments
int.setProperty(scope, "args", int.nativeToPseudo(workerScript.args));
}
- var interpreter = new _JSInterpreter__WEBPACK_IMPORTED_MODULE_3__["Interpreter"](code, interpreterInitialization);
+
+ var interpreter;
+ try {
+ interpreter = new _JSInterpreter__WEBPACK_IMPORTED_MODULE_3__[/* Interpreter */ "a"](code, interpreterInitialization);
+ } catch(e) {
+ Object(_utils_DialogBox__WEBPACK_IMPORTED_MODULE_12__["dialogBoxCreate"])("Syntax ERROR in " + workerScript.name + ":
" + e);
+ workerScript.env.stopFlag = true;
+ workerScript.running = false;
+ return;
+ }
return new Promise(function(resolve, reject) {
function runInterpreter() {
@@ -15837,7 +15858,18 @@ function startNetscript1Script(workerScript) {
}
}
- runInterpreter();
+ try {
+ runInterpreter();
+ } catch(e) {
+ if (Object(_utils_StringHelperFunctions__WEBPACK_IMPORTED_MODULE_16__["isString"])(e)) {
+ workerScript.errorMessage = e;
+ return reject(workerScript);
+ } else if (e instanceof WorkerScript) {
+ return reject(e);
+ } else {
+ return reject(workerScript);
+ }
+ }
});
@@ -15894,6 +15926,7 @@ function runScriptsLoop() {
p = startNetscript2Script(workerScripts[i]);
} else {
p = startNetscript1Script(workerScripts[i]);
+ if (!(p instanceof Promise)) {continue;}
/*
try {
var ast = parse(workerScripts[i].code, {sourceType:"module"});
@@ -29266,6 +29299,17 @@ function NetscriptFunctions(workerScript) {
throw Object(_NetscriptEvaluator__WEBPACK_IMPORTED_MODULE_25__[/* makeRuntimeRejectMsg */ "d"])(workerScript, "stopBladeburnerAction() failed because you do not currently have access to the Bladeburner API. This is either because you are not currently employed " +
"at the Bladeburner division or because you do not have Source-File 7");
},
+ getCurrentAction : function() {
+ if (workerScript.checkingRam) {
+ return updateStaticRam("getCurrentAction", _Constants__WEBPACK_IMPORTED_MODULE_6__[/* CONSTANTS */ "a"].ScriptBladeburnerApiBaseRamCost / 4);
+ }
+ updateDynamicRam("getCurrentAction", _Constants__WEBPACK_IMPORTED_MODULE_6__[/* CONSTANTS */ "a"].ScriptBladeburnerApiBaseRamCost / 2);
+ if (_Player__WEBPACK_IMPORTED_MODULE_16__[/* Player */ "a"].bladeburner instanceof _Bladeburner__WEBPACK_IMPORTED_MODULE_4__[/* Bladeburner */ "a"] && (_Player__WEBPACK_IMPORTED_MODULE_16__[/* Player */ "a"].bitNodeN === 7 || hasBladeburner2079SF)) {
+ return _Player__WEBPACK_IMPORTED_MODULE_16__[/* Player */ "a"].bladeburner.resetAction();
+ }
+ throw Object(_NetscriptEvaluator__WEBPACK_IMPORTED_MODULE_25__[/* makeRuntimeRejectMsg */ "d"])(workerScript, "getCurrentAction() failed because you do not currently have access to the Bladeburner API. This is either because you are not currently employed " +
+ "at the Bladeburner division or because you do not have Source-File 7");
+ },
getActionTime : function(type="", name="") {
if (workerScript.checkingRam) {
return updateStaticRam("getActionTime", _Constants__WEBPACK_IMPORTED_MODULE_6__[/* CONSTANTS */ "a"].ScriptBladeburnerApiBaseRamCost);
@@ -46295,146 +46339,3606 @@ exports.FactionInfos = {
/*!******************************!*\
!*** ./src/JSInterpreter.js ***!
\******************************/
-/*! no static exports found */
+/*! exports provided: Interpreter */
/*! exports used: Interpreter */
-/***/ (function(module, exports, __webpack_require__) {
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
+
+"use strict";
+/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() { return Interpreter; });
+/* harmony import */ var _utils_acorn__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../utils/acorn */ 43);
+/* harmony import */ var _utils_acorn__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_utils_acorn__WEBPACK_IMPORTED_MODULE_0__);
+
+/**
+ * @license
+ * JavaScript Interpreter
+ *
+ * Copyright 2013 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Interpreting JavaScript in JavaScript.
+ * @author fraser@google.com (Neil Fraser)
+ */
+'use strict';
+
+/**
+ * Create a new interpreter.
+ * @param {string|!Object} code Raw JavaScript text or AST.
+ * @param {Function=} opt_initFunc Optional initialization function. Used to
+ * define APIs. When called it is passed the interpreter object and the
+ * global scope object.
+ * @constructor
+ */
+var Interpreter = function(code, opt_initFunc) {
+ if (typeof code === 'string') {
+ code = _utils_acorn__WEBPACK_IMPORTED_MODULE_0__["parse"](code, Interpreter.PARSE_OPTIONS);
+ }
+ this.ast = code;
+ this.initFunc_ = opt_initFunc;
+ this.paused_ = false;
+ this.polyfills_ = [];
+ // Unique identifier for native functions. Used in serialization.
+ this.functionCounter_ = 0;
+ // Map node types to our step function names; a property lookup is faster
+ // than string concatenation with "step" prefix.
+ this.stepFunctions_ = Object.create(null);
+ var stepMatch = /^step([A-Z]\w*)$/;
+ var m;
+ for (var methodName in this) {
+ if ((typeof this[methodName] === 'function') &&
+ (m = methodName.match(stepMatch))) {
+ this.stepFunctions_[m[1]] = this[methodName].bind(this);
+ }
+ }
+ // Create and initialize the global scope.
+ this.global = this.createScope(this.ast, null);
+ // Run the polyfills.
+ this.ast = _utils_acorn__WEBPACK_IMPORTED_MODULE_0__["parse"](this.polyfills_.join('\n'), Interpreter.PARSE_OPTIONS);
+ this.polyfills_ = undefined; // Allow polyfill strings to garbage collect.
+ this.stripLocations_(this.ast, undefined, undefined);
+ var state = new Interpreter.State(this.ast, this.global);
+ state.done = false;
+ this.stateStack = [state];
+ this.run();
+ this.value = undefined;
+ // Point at the main program.
+ this.ast = code;
+ var state = new Interpreter.State(this.ast, this.global);
+ state.done = false;
+ this.stateStack.length = 0;
+ this.stateStack[0] = state;
+ // Get a handle on Acorn's node_t object. It's tricky to access.
+ this.nodeConstructor = state.node.constructor;
+ // Preserve publicly properties from being pruned/renamed by JS compilers.
+ // Add others as needed.
+ this['stateStack'] = this.stateStack;
+};
+
+/**
+ * @const {!Object} Configuration used for all Acorn parsing.
+ */
+Interpreter.PARSE_OPTIONS = {
+ ecmaVersion: 5
+};
+
+/**
+ * Property descriptor of readonly properties.
+ */
+Interpreter.READONLY_DESCRIPTOR = {
+ configurable: true,
+ enumerable: true,
+ writable: false
+};
+
+/**
+ * Property descriptor of non-enumerable properties.
+ */
+Interpreter.NONENUMERABLE_DESCRIPTOR = {
+ configurable: true,
+ enumerable: false,
+ writable: true
+};
+
+/**
+ * Property descriptor of readonly, non-enumerable properties.
+ */
+Interpreter.READONLY_NONENUMERABLE_DESCRIPTOR = {
+ configurable: true,
+ enumerable: false,
+ writable: false
+};
+
+/**
+ * Property descriptor of variables.
+ */
+Interpreter.VARIABLE_DESCRIPTOR = {
+ configurable: false,
+ enumerable: true,
+ writable: true
+};
+
+/**
+ * Unique symbol for indicating that a step has encountered an error, has
+ * added it to the stack, and will be thrown within the user's program.
+ * When STEP_ERROR is thrown in the JS-Interpreter, the error can be ignored.
+ */
+Interpreter.STEP_ERROR = {};
+
+/**
+ * Unique symbol for indicating that a reference is a variable on the scope,
+ * not an object property.
+ */
+Interpreter.SCOPE_REFERENCE = {};
+
+/**
+ * Unique symbol for indicating, when used as the value of the value
+ * parameter in calls to setProperty and friends, that the value
+ * should be taken from the property descriptor instead.
+ */
+Interpreter.VALUE_IN_DESCRIPTOR = {};
+
+/**
+ * For cycle detection in array to string and error conversion;
+ * see spec bug github.com/tc39/ecma262/issues/289
+ * Since this is for atomic actions only, it can be a class property.
+ */
+Interpreter.toStringCycles_ = [];
+
+/**
+ * Add more code to the interpreter.
+ * @param {string|!Object} code Raw JavaScript text or AST.
+ */
+Interpreter.prototype.appendCode = function(code) {
+ var state = this.stateStack[0];
+ if (!state || state.node['type'] !== 'Program') {
+ throw Error('Expecting original AST to start with a Program node.');
+ }
+ if (typeof code === 'string') {
+ code = _utils_acorn__WEBPACK_IMPORTED_MODULE_0__["parse"](code, Interpreter.PARSE_OPTIONS);
+ }
+ if (!code || code['type'] !== 'Program') {
+ throw Error('Expecting new AST to start with a Program node.');
+ }
+ this.populateScope_(code, state.scope);
+ // Append the new program to the old one.
+ for (var i = 0, node; (node = code['body'][i]); i++) {
+ state.node['body'].push(node);
+ }
+ state.done = false;
+};
+
+/**
+ * Execute one step of the interpreter.
+ * @return {boolean} True if a step was executed, false if no more instructions.
+ */
+Interpreter.prototype.step = function() {
+ var stack = this.stateStack;
+ var state = stack[stack.length - 1];
+ if (!state) {
+ return false;
+ }
+ var node = state.node, type = node['type'];
+ if (type === 'Program' && state.done) {
+ return false;
+ } else if (this.paused_) {
+ return true;
+ }
+ try {
+ var nextState = this.stepFunctions_[type](stack, state, node);
+ } catch (e) {
+ // Eat any step errors. They have been thrown on the stack.
+ if (e !== Interpreter.STEP_ERROR) {
+ // Uh oh. This is a real error in the JS-Interpreter. Rethrow.
+ throw e;
+ }
+ }
+ if (nextState) {
+ stack.push(nextState);
+ }
+ if (!node['end']) {
+ // This is polyfill code. Keep executing until we arrive at user code.
+ return this.step();
+ }
+ return true;
+};
+
+/**
+ * Execute the interpreter to program completion. Vulnerable to infinite loops.
+ * @return {boolean} True if a execution is asynchronously blocked,
+ * false if no more instructions.
+ */
+Interpreter.prototype.run = function() {
+ while (!this.paused_ && this.step()) {}
+ return this.paused_;
+};
+
+/**
+ * Initialize the global scope with buitin properties and functions.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initGlobalScope = function(scope) {
+ // Initialize uneditable global properties.
+ this.setProperty(scope, 'NaN', NaN,
+ Interpreter.READONLY_DESCRIPTOR);
+ this.setProperty(scope, 'Infinity', Infinity,
+ Interpreter.READONLY_DESCRIPTOR);
+ this.setProperty(scope, 'undefined', undefined,
+ Interpreter.READONLY_DESCRIPTOR);
+ this.setProperty(scope, 'window', scope,
+ Interpreter.READONLY_DESCRIPTOR);
+ this.setProperty(scope, 'this', scope,
+ Interpreter.READONLY_DESCRIPTOR);
+ this.setProperty(scope, 'self', scope); // Editable.
+
+ // Create the objects which will become Object.prototype and
+ // Function.prototype, which are needed to bootstrap everything else.
+ this.OBJECT_PROTO = new Interpreter.Object(null);
+ this.FUNCTION_PROTO = new Interpreter.Object(this.OBJECT_PROTO);
+ // Initialize global objects.
+ this.initFunction(scope);
+ this.initObject(scope);
+ // Unable to set scope's parent prior (OBJECT did not exist).
+ // Note that in a browser this would be 'Window', whereas in Node.js it would
+ // be 'Object'. This interpreter is closer to Node in that it has no DOM.
+ scope.proto = this.OBJECT_PROTO;
+ this.setProperty(scope, 'constructor', this.OBJECT,
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+ this.initArray(scope);
+ this.initString(scope);
+ this.initBoolean(scope);
+ this.initNumber(scope);
+ this.initDate(scope);
+ this.initRegExp(scope);
+ this.initError(scope);
+ this.initMath(scope);
+ this.initJSON(scope);
+
+ // Initialize global functions.
+ var thisInterpreter = this;
+ var func = this.createNativeFunction(
+ function(x) {throw EvalError("Can't happen");}, false);
+ func.eval = true;
+ this.setProperty(scope, 'eval', func);
+
+ this.setProperty(scope, 'parseInt',
+ this.createNativeFunction(parseInt, false));
+ this.setProperty(scope, 'parseFloat',
+ this.createNativeFunction(parseFloat, false));
+
+ this.setProperty(scope, 'isNaN',
+ this.createNativeFunction(isNaN, false));
+
+ this.setProperty(scope, 'isFinite',
+ this.createNativeFunction(isFinite, false));
+
+ var strFunctions = [
+ [escape, 'escape'], [unescape, 'unescape'],
+ [decodeURI, 'decodeURI'], [decodeURIComponent, 'decodeURIComponent'],
+ [encodeURI, 'encodeURI'], [encodeURIComponent, 'encodeURIComponent']
+ ];
+ for (var i = 0; i < strFunctions.length; i++) {
+ var wrapper = (function(nativeFunc) {
+ return function(str) {
+ try {
+ return nativeFunc(str);
+ } catch (e) {
+ // decodeURI('%xy') will throw an error. Catch and rethrow.
+ thisInterpreter.throwException(thisInterpreter.URI_ERROR, e.message);
+ }
+ };
+ })(strFunctions[i][0]);
+ this.setProperty(scope, strFunctions[i][1],
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+ }
+ // Preserve publicly properties from being pruned/renamed by JS compilers.
+ // Add others as needed.
+ this['OBJECT'] = this.OBJECT; this['OBJECT_PROTO'] = this.OBJECT_PROTO;
+ this['FUNCTION'] = this.FUNCTION; this['FUNCTION_PROTO'] = this.FUNCTION_PROTO;
+ this['ARRAY'] = this.ARRAY; this['ARRAY_PROTO'] = this.ARRAY_PROTO;
+ this['REGEXP'] = this.REGEXP; this['REGEXP_PROTO'] = this.REGEXP_PROTO;
+ this['DATE'] = this.DATE; this['DATE_PROTO'] = this.DATE_PROTO;
+ // The following properties are obsolete. Do not use.
+ this['UNDEFINED'] = undefined; this['NULL'] = null; this['NAN'] = NaN;
+ this['TRUE'] = true; this['FALSE'] = false; this['STRING_EMPTY'] = '';
+ this['NUMBER_ZERO'] = 0; this['NUMBER_ONE'] = 1;
+
+ // Run any user-provided initialization.
+ if (this.initFunc_) {
+ this.initFunc_(this, scope);
+ }
+};
+
+/**
+ * Initialize the Function class.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initFunction = function(scope) {
+ var thisInterpreter = this;
+ var wrapper;
+ var identifierRegexp = /^[A-Za-z_$][\w$]*$/;
+ // Function constructor.
+ wrapper = function(var_args) {
+ if (thisInterpreter.calledWithNew()) {
+ // Called as new Function().
+ var newFunc = this;
+ } else {
+ // Called as Function().
+ var newFunc =
+ thisInterpreter.createObjectProto(thisInterpreter.FUNCTION_PROTO);
+ }
+ if (arguments.length) {
+ var code = String(arguments[arguments.length - 1]);
+ } else {
+ var code = '';
+ }
+ var argsStr = Array.prototype.slice.call(arguments, 0, -1).join(',').trim();
+ if (argsStr) {
+ var args = argsStr.split(/\s*,\s*/);
+ for (var i = 0; i < args.length; i++) {
+ var name = args[i];
+ if (!identifierRegexp.test(name)) {
+ thisInterpreter.throwException(thisInterpreter.SYNTAX_ERROR,
+ 'Invalid function argument: ' + name);
+ }
+ }
+ argsStr = args.join(', ');
+ }
+ // Interestingly, the scope for constructed functions is the global scope,
+ // even if they were constructed in some other scope.
+ newFunc.parentScope = thisInterpreter.global;
+ // Acorn needs to parse code in the context of a function or else 'return'
+ // statements will be syntax errors.
+ try {
+ var ast = _utils_acorn__WEBPACK_IMPORTED_MODULE_0__["parse"]('(function(' + argsStr + ') {' + code + '})',
+ Interpreter.PARSE_OPTIONS);
+ } catch (e) {
+ // Acorn threw a SyntaxError. Rethrow as a trappable error.
+ thisInterpreter.throwException(thisInterpreter.SYNTAX_ERROR,
+ 'Invalid code: ' + e.message);
+ }
+ if (ast['body'].length !== 1) {
+ // Function('a', 'return a + 6;}; {alert(1);');
+ thisInterpreter.throwException(thisInterpreter.SYNTAX_ERROR,
+ 'Invalid code in function body.');
+ }
+ newFunc.node = ast['body'][0]['expression'];
+ thisInterpreter.setProperty(newFunc, 'length', newFunc.node['length'],
+ Interpreter.READONLY_DESCRIPTOR);
+ return newFunc;
+ };
+ wrapper.id = this.functionCounter_++;
+ this.FUNCTION = this.createObjectProto(this.FUNCTION_PROTO);
+
+ this.setProperty(scope, 'Function', this.FUNCTION);
+ // Manually setup type and prototype because createObj doesn't recognize
+ // this object as a function (this.FUNCTION did not exist).
+ this.setProperty(this.FUNCTION, 'prototype', this.FUNCTION_PROTO);
+ this.FUNCTION.nativeFunc = wrapper;
+
+ // Configure Function.prototype.
+ this.setProperty(this.FUNCTION_PROTO, 'constructor', this.FUNCTION,
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+ this.FUNCTION_PROTO.nativeFunc = function() {};
+ this.FUNCTION_PROTO.nativeFunc.id = this.functionCounter_++;
+ this.setProperty(this.FUNCTION_PROTO, 'length', 0,
+ Interpreter.READONLY_DESCRIPTOR);
+
+ var boxThis = function(value) {
+ // In non-strict mode 'this' must be an object.
+ if ((!value || !value.isObject) && !thisInterpreter.getScope().strict) {
+ if (value === undefined || value === null) {
+ // 'Undefined' and 'null' are changed to global object.
+ value = thisInterpreter.global;
+ } else {
+ // Primitives must be boxed in non-strict mode.
+ var box = thisInterpreter.createObjectProto(
+ thisInterpreter.getPrototype(value));
+ box.data = value;
+ value = box;
+ }
+ }
+ return value;
+ };
+
+ wrapper = function(thisArg, args) {
+ var state =
+ thisInterpreter.stateStack[thisInterpreter.stateStack.length - 1];
+ // Rewrite the current 'CallExpression' to apply a different function.
+ state.func_ = this;
+ // Assign the 'this' object.
+ state.funcThis_ = boxThis(thisArg);
+ // Bind any provided arguments.
+ state.arguments_ = [];
+ if (args !== null && args !== undefined) {
+ if (args.isObject) {
+ state.arguments_ = thisInterpreter.arrayPseudoToNative(args);
+ } else {
+ thisInterpreter.throwException(thisInterpreter.TYPE_ERROR,
+ 'CreateListFromArrayLike called on non-object');
+ }
+ }
+ state.doneExec_ = false;
+ };
+ this.setNativeFunctionPrototype(this.FUNCTION, 'apply', wrapper);
+
+ wrapper = function(thisArg /*, var_args */) {
+ var state =
+ thisInterpreter.stateStack[thisInterpreter.stateStack.length - 1];
+ // Rewrite the current 'CallExpression' to call a different function.
+ state.func_ = this;
+ // Assign the 'this' object.
+ state.funcThis_ = boxThis(thisArg);
+ // Bind any provided arguments.
+ state.arguments_ = [];
+ for (var i = 1; i < arguments.length; i++) {
+ state.arguments_.push(arguments[i]);
+ }
+ state.doneExec_ = false;
+ };
+ this.setNativeFunctionPrototype(this.FUNCTION, 'call', wrapper);
+
+ this.polyfills_.push(
+// Polyfill copied from:
+// developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_objects/Function/bind
+"Object.defineProperty(Function.prototype, 'bind',",
+ "{configurable: true, writable: true, value:",
+ "function(oThis) {",
+ "if (typeof this !== 'function') {",
+ "throw TypeError('What is trying to be bound is not callable');",
+ "}",
+ "var aArgs = Array.prototype.slice.call(arguments, 1),",
+ "fToBind = this,",
+ "fNOP = function() {},",
+ "fBound = function() {",
+ "return fToBind.apply(this instanceof fNOP",
+ "? this",
+ ": oThis,",
+ "aArgs.concat(Array.prototype.slice.call(arguments)));",
+ "};",
+ "if (this.prototype) {",
+ "fNOP.prototype = this.prototype;",
+ "}",
+ "fBound.prototype = new fNOP();",
+ "return fBound;",
+ "}",
+"});",
+"");
+
+ // Function has no parent to inherit from, so it needs its own mandatory
+ // toString and valueOf functions.
+ wrapper = function() {
+ return this.toString();
+ };
+ this.setNativeFunctionPrototype(this.FUNCTION, 'toString', wrapper);
+ this.setProperty(this.FUNCTION, 'toString',
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+ wrapper = function() {
+ return this.valueOf();
+ };
+ this.setNativeFunctionPrototype(this.FUNCTION, 'valueOf', wrapper);
+ this.setProperty(this.FUNCTION, 'valueOf',
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+};
+
+/**
+ * Initialize the Object class.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initObject = function(scope) {
+ var thisInterpreter = this;
+ var wrapper;
+ // Object constructor.
+ wrapper = function(value) {
+ if (value === undefined || value === null) {
+ // Create a new object.
+ if (thisInterpreter.calledWithNew()) {
+ // Called as new Object().
+ return this;
+ } else {
+ // Called as Object().
+ return thisInterpreter.createObjectProto(thisInterpreter.OBJECT_PROTO);
+ }
+ }
+ if (!value.isObject) {
+ // Wrap the value as an object.
+ var box = thisInterpreter.createObjectProto(
+ thisInterpreter.getPrototype(value));
+ box.data = value;
+ return box;
+ }
+ // Return the provided object.
+ return value;
+ };
+ this.OBJECT = this.createNativeFunction(wrapper, true);
+ // Throw away the created prototype and use the root prototype.
+ this.setProperty(this.OBJECT, 'prototype', this.OBJECT_PROTO);
+ this.setProperty(this.OBJECT_PROTO, 'constructor', this.OBJECT,
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+ this.setProperty(scope, 'Object', this.OBJECT);
+
+ /**
+ * Checks if the provided value is null or undefined.
+ * If so, then throw an error in the call stack.
+ * @param {Interpreter.Value} value Value to check.
+ */
+ var throwIfNullUndefined = function(value) {
+ if (value === undefined || value === null) {
+ thisInterpreter.throwException(thisInterpreter.TYPE_ERROR,
+ "Cannot convert '" + value + "' to object");
+ }
+ };
+
+ // Static methods on Object.
+ wrapper = function(obj) {
+ throwIfNullUndefined(obj);
+ var props = obj.isObject ? obj.properties : obj;
+ return thisInterpreter.arrayNativeToPseudo(
+ Object.getOwnPropertyNames(props));
+ };
+ this.setProperty(this.OBJECT, 'getOwnPropertyNames',
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ wrapper = function(obj) {
+ throwIfNullUndefined(obj);
+ if (obj.isObject) {
+ obj = obj.properties;
+ }
+ return thisInterpreter.arrayNativeToPseudo(Object.keys(obj));
+ };
+ this.setProperty(this.OBJECT, 'keys',
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ wrapper = function(proto) {
+ // Support for the second argument is the responsibility of a polyfill.
+ if (proto === null) {
+ return thisInterpreter.createObjectProto(null);
+ }
+ if (proto === undefined || !proto.isObject) {
+ thisInterpreter.throwException(thisInterpreter.TYPE_ERROR,
+ 'Object prototype may only be an Object or null');
+ }
+ return thisInterpreter.createObjectProto(proto);
+ };
+ this.setProperty(this.OBJECT, 'create',
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ // Add a polyfill to handle create's second argument.
+ this.polyfills_.push(
+"(function() {",
+ "var create_ = Object.create;",
+ "Object.create = function(proto, props) {",
+ "var obj = create_(proto);",
+ "props && Object.defineProperties(obj, props);",
+ "return obj;",
+ "};",
+"})();",
+"");
+
+ wrapper = function(obj, prop, descriptor) {
+ prop = String(prop);
+ if (!obj || !obj.isObject) {
+ thisInterpreter.throwException(thisInterpreter.TYPE_ERROR,
+ 'Object.defineProperty called on non-object');
+ }
+ if (!descriptor || !descriptor.isObject) {
+ thisInterpreter.throwException(thisInterpreter.TYPE_ERROR,
+ 'Property description must be an object');
+ }
+ if (!obj.properties[prop] && obj.preventExtensions) {
+ thisInterpreter.throwException(thisInterpreter.TYPE_ERROR,
+ "Can't define property '" + prop + "', object is not extensible");
+ }
+ // The polyfill guarantees no inheritance and no getter functions.
+ // Therefore the descriptor properties map is the native object needed.
+ thisInterpreter.setProperty(obj, prop, Interpreter.VALUE_IN_DESCRIPTOR,
+ descriptor.properties);
+ return obj;
+ };
+ this.setProperty(this.OBJECT, 'defineProperty',
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ this.polyfills_.push(
+// Flatten the descriptor to remove any inheritance or getter functions.
+"(function() {",
+ "var defineProperty_ = Object.defineProperty;",
+ "Object.defineProperty = function(obj, prop, d1) {",
+ "var d2 = {};",
+ "if ('configurable' in d1) d2.configurable = d1.configurable;",
+ "if ('enumerable' in d1) d2.enumerable = d1.enumerable;",
+ "if ('writable' in d1) d2.writable = d1.writable;",
+ "if ('value' in d1) d2.value = d1.value;",
+ "if ('get' in d1) d2.get = d1.get;",
+ "if ('set' in d1) d2.set = d1.set;",
+ "return defineProperty_(obj, prop, d2);",
+ "};",
+"})();",
+
+"Object.defineProperty(Object, 'defineProperties',",
+ "{configurable: true, writable: true, value:",
+ "function(obj, props) {",
+ "var keys = Object.keys(props);",
+ "for (var i = 0; i < keys.length; i++) {",
+ "Object.defineProperty(obj, keys[i], props[keys[i]]);",
+ "}",
+ "return obj;",
+ "}",
+"});",
+"");
+
+ wrapper = function(obj, prop) {
+ if (!obj || !obj.isObject) {
+ thisInterpreter.throwException(thisInterpreter.TYPE_ERROR,
+ 'Object.getOwnPropertyDescriptor called on non-object');
+ }
+ prop = String(prop);
+ if (!(prop in obj.properties)) {
+ return undefined;
+ }
+ var descriptor = Object.getOwnPropertyDescriptor(obj.properties, prop);
+ var getter = obj.getter[prop];
+ var setter = obj.setter[prop];
+
+ if (getter || setter) {
+ descriptor.get = getter;
+ descriptor.set = setter;
+ delete descriptor.value;
+ delete descriptor.writable;
+ }
+ // Preserve value, but remove it for the nativeToPseudo call.
+ var value = descriptor.value;
+ var hasValue = 'value' in descriptor;
+ delete descriptor.value;
+ var pseudoDescriptor = thisInterpreter.nativeToPseudo(descriptor);
+ if (hasValue) {
+ thisInterpreter.setProperty(pseudoDescriptor, 'value', value);
+ }
+ return pseudoDescriptor;
+ };
+ this.setProperty(this.OBJECT, 'getOwnPropertyDescriptor',
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ wrapper = function(obj) {
+ throwIfNullUndefined(obj);
+ return thisInterpreter.getPrototype(obj);
+ };
+ this.setProperty(this.OBJECT, 'getPrototypeOf',
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ wrapper = function(obj) {
+ return Boolean(obj) && !obj.preventExtensions;
+ };
+ this.setProperty(this.OBJECT, 'isExtensible',
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ wrapper = function(obj) {
+ if (obj && obj.isObject) {
+ obj.preventExtensions = true;
+ }
+ return obj;
+ };
+ this.setProperty(this.OBJECT, 'preventExtensions',
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ // Instance methods on Object.
+ this.setNativeFunctionPrototype(this.OBJECT, 'toString',
+ Interpreter.Object.prototype.toString);
+ this.setNativeFunctionPrototype(this.OBJECT, 'toLocaleString',
+ Interpreter.Object.prototype.toString);
+ this.setNativeFunctionPrototype(this.OBJECT, 'valueOf',
+ Interpreter.Object.prototype.valueOf);
+
+ wrapper = function(prop) {
+ throwIfNullUndefined(this);
+ if (!this.isObject) {
+ return this.hasOwnProperty(prop);
+ }
+ return String(prop) in this.properties;
+ };
+ this.setNativeFunctionPrototype(this.OBJECT, 'hasOwnProperty', wrapper);
+
+ wrapper = function(prop) {
+ throwIfNullUndefined(this);
+ if (!this.isObject) {
+ return this.propertyIsEnumerable(prop);
+ }
+ return Object.prototype.propertyIsEnumerable.call(this.properties, prop);
+ };
+ this.setNativeFunctionPrototype(this.OBJECT, 'propertyIsEnumerable', wrapper);
+
+ wrapper = function(obj) {
+ while (true) {
+ // Note, circular loops shouldn't be possible.
+ obj = thisInterpreter.getPrototype(obj);
+ if (!obj) {
+ // No parent; reached the top.
+ return false;
+ }
+ if (obj === this) {
+ return true;
+ }
+ }
+ };
+ this.setNativeFunctionPrototype(this.OBJECT, 'isPrototypeOf', wrapper);
+};
+
+/**
+ * Initialize the Array class.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initArray = function(scope) {
+ var thisInterpreter = this;
+ var wrapper;
+ // Array constructor.
+ wrapper = function(var_args) {
+ if (thisInterpreter.calledWithNew()) {
+ // Called as new Array().
+ var newArray = this;
+ } else {
+ // Called as Array().
+ var newArray =
+ thisInterpreter.createObjectProto(thisInterpreter.ARRAY_PROTO);
+ }
+ var first = arguments[0];
+ if (arguments.length === 1 && typeof first === 'number') {
+ if (isNaN(Interpreter.legalArrayLength(first))) {
+ thisInterpreter.throwException(thisInterpreter.RANGE_ERROR,
+ 'Invalid array length');
+ }
+ newArray.properties.length = first;
+ } else {
+ for (var i = 0; i < arguments.length; i++) {
+ newArray.properties[i] = arguments[i];
+ }
+ newArray.properties.length = i;
+ }
+ return newArray;
+ };
+ this.ARRAY = this.createNativeFunction(wrapper, true);
+ this.ARRAY_PROTO = this.ARRAY.properties['prototype'];
+ this.setProperty(scope, 'Array', this.ARRAY);
+
+ // Static methods on Array.
+ wrapper = function(obj) {
+ return obj && obj.class === 'Array';
+ };
+ this.setProperty(this.ARRAY, 'isArray',
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ // Instance methods on Array.
+ wrapper = function() {
+ return Array.prototype.pop.call(this.properties);
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'pop', wrapper);
+
+ wrapper = function(var_args) {
+ return Array.prototype.push.apply(this.properties, arguments);
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'push', wrapper);
+
+ wrapper = function() {
+ return Array.prototype.shift.call(this.properties);
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'shift', wrapper);
+
+ wrapper = function(var_args) {
+ return Array.prototype.unshift.apply(this.properties, arguments);
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'unshift', wrapper);
+
+ wrapper = function() {
+ Array.prototype.reverse.call(this.properties);
+ return this;
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'reverse', wrapper);
+
+ wrapper = function(index, howmany /*, var_args*/) {
+ var list = Array.prototype.splice.apply(this.properties, arguments);
+ return thisInterpreter.arrayNativeToPseudo(list);
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'splice', wrapper);
+
+ wrapper = function(opt_begin, opt_end) {
+ var list = Array.prototype.slice.call(this.properties, opt_begin, opt_end);
+ return thisInterpreter.arrayNativeToPseudo(list);
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'slice', wrapper);
+
+ wrapper = function(opt_separator) {
+ return Array.prototype.join.call(this.properties, opt_separator);
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'join', wrapper);
+
+ wrapper = function(var_args) {
+ var list = [];
+ var length = 0;
+ // Start by copying the current array.
+ var iLength = thisInterpreter.getProperty(this, 'length');
+ for (var i = 0; i < iLength; i++) {
+ if (thisInterpreter.hasProperty(this, i)) {
+ var element = thisInterpreter.getProperty(this, i);
+ list[length] = element;
+ }
+ length++;
+ }
+ // Loop through all arguments and copy them in.
+ for (var i = 0; i < arguments.length; i++) {
+ var value = arguments[i];
+ if (thisInterpreter.isa(value, thisInterpreter.ARRAY)) {
+ var jLength = thisInterpreter.getProperty(value, 'length');
+ for (var j = 0; j < jLength; j++) {
+ if (thisInterpreter.hasProperty(value, j)) {
+ list[length] = thisInterpreter.getProperty(value, j);
+ }
+ length++;
+ }
+ } else {
+ list[length] = value;
+ }
+ }
+ return thisInterpreter.arrayNativeToPseudo(list);
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'concat', wrapper);
+
+ wrapper = function(searchElement, opt_fromIndex) {
+ return Array.prototype.indexOf.apply(this.properties, arguments);
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'indexOf', wrapper);
+
+ wrapper = function(searchElement, opt_fromIndex) {
+ return Array.prototype.lastIndexOf.apply(this.properties, arguments);
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'lastIndexOf', wrapper);
+
+ wrapper = function() {
+ Array.prototype.sort.call(this.properties);
+ return this;
+ };
+ this.setNativeFunctionPrototype(this.ARRAY, 'sort', wrapper);
+
+ this.polyfills_.push(
+// Polyfill copied from:
+// developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/every
+"Object.defineProperty(Array.prototype, 'every',",
+ "{configurable: true, writable: true, value:",
+ "function(callbackfn, thisArg) {",
+ "if (!this || typeof callbackfn !== 'function') throw TypeError();",
+ "var T, k;",
+ "var O = Object(this);",
+ "var len = O.length >>> 0;",
+ "if (arguments.length > 1) T = thisArg;",
+ "k = 0;",
+ "while (k < len) {",
+ "if (k in O && !callbackfn.call(T, O[k], k, O)) return false;",
+ "k++;",
+ "}",
+ "return true;",
+ "}",
+"});",
+
+// Polyfill copied from:
+// developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/filter
+"Object.defineProperty(Array.prototype, 'filter',",
+ "{configurable: true, writable: true, value:",
+ "function(fun/*, thisArg*/) {",
+ "if (this === void 0 || this === null || typeof fun !== 'function') throw TypeError();",
+ "var t = Object(this);",
+ "var len = t.length >>> 0;",
+ "var res = [];",
+ "var thisArg = arguments.length >= 2 ? arguments[1] : void 0;",
+ "for (var i = 0; i < len; i++) {",
+ "if (i in t) {",
+ "var val = t[i];",
+ "if (fun.call(thisArg, val, i, t)) res.push(val);",
+ "}",
+ "}",
+ "return res;",
+ "}",
+"});",
+
+// Polyfill copied from:
+// developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
+"Object.defineProperty(Array.prototype, 'forEach',",
+ "{configurable: true, writable: true, value:",
+ "function(callback, thisArg) {",
+ "if (!this || typeof callback !== 'function') throw TypeError();",
+ "var T, k;",
+ "var O = Object(this);",
+ "var len = O.length >>> 0;",
+ "if (arguments.length > 1) T = thisArg;",
+ "k = 0;",
+ "while (k < len) {",
+ "if (k in O) callback.call(T, O[k], k, O);",
+ "k++;",
+ "}",
+ "}",
+"});",
+
+// Polyfill copied from:
+// developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/map
+"Object.defineProperty(Array.prototype, 'map',",
+ "{configurable: true, writable: true, value:",
+ "function(callback, thisArg) {",
+ "if (!this || typeof callback !== 'function') new TypeError;",
+ "var T, A, k;",
+ "var O = Object(this);",
+ "var len = O.length >>> 0;",
+ "if (arguments.length > 1) T = thisArg;",
+ "A = new Array(len);",
+ "k = 0;",
+ "while (k < len) {",
+ "if (k in O) A[k] = callback.call(T, O[k], k, O);",
+ "k++;",
+ "}",
+ "return A;",
+ "}",
+"});",
+
+// Polyfill copied from:
+// developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce
+"Object.defineProperty(Array.prototype, 'reduce',",
+ "{configurable: true, writable: true, value:",
+ "function(callback /*, initialValue*/) {",
+ "if (!this || typeof callback !== 'function') throw TypeError();",
+ "var t = Object(this), len = t.length >>> 0, k = 0, value;",
+ "if (arguments.length === 2) {",
+ "value = arguments[1];",
+ "} else {",
+ "while (k < len && !(k in t)) k++;",
+ "if (k >= len) {",
+ "throw TypeError('Reduce of empty array with no initial value');",
+ "}",
+ "value = t[k++];",
+ "}",
+ "for (; k < len; k++) {",
+ "if (k in t) value = callback(value, t[k], k, t);",
+ "}",
+ "return value;",
+ "}",
+"});",
+
+// Polyfill copied from:
+// developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/ReduceRight
+"Object.defineProperty(Array.prototype, 'reduceRight',",
+ "{configurable: true, writable: true, value:",
+ "function(callback /*, initialValue*/) {",
+ "if (null === this || 'undefined' === typeof this || 'function' !== typeof callback) throw TypeError();",
+ "var t = Object(this), len = t.length >>> 0, k = len - 1, value;",
+ "if (arguments.length >= 2) {",
+ "value = arguments[1];",
+ "} else {",
+ "while (k >= 0 && !(k in t)) k--;",
+ "if (k < 0) {",
+ "throw TypeError('Reduce of empty array with no initial value');",
+ "}",
+ "value = t[k--];",
+ "}",
+ "for (; k >= 0; k--) {",
+ "if (k in t) value = callback(value, t[k], k, t);",
+ "}",
+ "return value;",
+ "}",
+"});",
+
+// Polyfill copied from:
+// developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/some
+"Object.defineProperty(Array.prototype, 'some',",
+ "{configurable: true, writable: true, value:",
+ "function(fun/*, thisArg*/) {",
+ "if (!this || typeof fun !== 'function') throw TypeError();",
+ "var t = Object(this);",
+ "var len = t.length >>> 0;",
+ "var thisArg = arguments.length >= 2 ? arguments[1] : void 0;",
+ "for (var i = 0; i < len; i++) {",
+ "if (i in t && fun.call(thisArg, t[i], i, t)) {",
+ "return true;",
+ "}",
+ "}",
+ "return false;",
+ "}",
+"});",
+
+
+"(function() {",
+ "var sort_ = Array.prototype.sort;",
+ "Array.prototype.sort = function(opt_comp) {",
+ // Fast native sort.
+ "if (typeof opt_comp !== 'function') {",
+ "return sort_.call(this);",
+ "}",
+ // Slow bubble sort.
+ "for (var i = 0; i < this.length; i++) {",
+ "var changes = 0;",
+ "for (var j = 0; j < this.length - i - 1; j++) {",
+ "if (opt_comp(this[j], this[j + 1]) > 0) {",
+ "var swap = this[j];",
+ "this[j] = this[j + 1];",
+ "this[j + 1] = swap;",
+ "changes++;",
+ "}",
+ "}",
+ "if (!changes) break;",
+ "}",
+ "return this;",
+ "};",
+"})();",
+
+"Object.defineProperty(Array.prototype, 'toLocaleString',",
+ "{configurable: true, writable: true, value:",
+ "function() {",
+ "var out = [];",
+ "for (var i = 0; i < this.length; i++) {",
+ "out[i] = (this[i] === null || this[i] === undefined) ? '' : this[i].toLocaleString();",
+ "}",
+ "return out.join(',');",
+ "}",
+"});",
+"");
+};
+
+/**
+ * Initialize the String class.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initString = function(scope) {
+ var thisInterpreter = this;
+ var wrapper;
+ // String constructor.
+ wrapper = function(value) {
+ value = String(value);
+ if (thisInterpreter.calledWithNew()) {
+ // Called as new String().
+ this.data = value;
+ return this;
+ } else {
+ // Called as String().
+ return value;
+ }
+ };
+ this.STRING = this.createNativeFunction(wrapper, true);
+ this.setProperty(scope, 'String', this.STRING);
+
+ // Static methods on String.
+ this.setProperty(this.STRING, 'fromCharCode',
+ this.createNativeFunction(String.fromCharCode, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ // Instance methods on String.
+ // Methods with exclusively primitive arguments.
+ var functions = ['charAt', 'charCodeAt', 'concat', 'indexOf', 'lastIndexOf',
+ 'slice', 'substr', 'substring', 'toLocaleLowerCase', 'toLocaleUpperCase',
+ 'toLowerCase', 'toUpperCase', 'trim'];
+ for (var i = 0; i < functions.length; i++) {
+ this.setNativeFunctionPrototype(this.STRING, functions[i],
+ String.prototype[functions[i]]);
+ }
+
+ wrapper = function(compareString, locales, options) {
+ locales = locales ? thisInterpreter.pseudoToNative(locales) : undefined;
+ options = options ? thisInterpreter.pseudoToNative(options) : undefined;
+ return String(this).localeCompare(compareString, locales, options);
+ };
+ this.setNativeFunctionPrototype(this.STRING, 'localeCompare', wrapper);
+
+ wrapper = function(separator, limit) {
+ if (thisInterpreter.isa(separator, thisInterpreter.REGEXP)) {
+ separator = separator.data;
+ }
+ var jsList = String(this).split(separator, limit);
+ return thisInterpreter.arrayNativeToPseudo(jsList);
+ };
+ this.setNativeFunctionPrototype(this.STRING, 'split', wrapper);
+
+ wrapper = function(regexp) {
+ if (thisInterpreter.isa(regexp, thisInterpreter.REGEXP)) {
+ regexp = regexp.data;
+ }
+ var m = String(this).match(regexp);
+ return m && thisInterpreter.arrayNativeToPseudo(m);
+ };
+ this.setNativeFunctionPrototype(this.STRING, 'match', wrapper);
+
+ wrapper = function(regexp) {
+ if (thisInterpreter.isa(regexp, thisInterpreter.REGEXP)) {
+ regexp = regexp.data;
+ }
+ return String(this).search(regexp);
+ };
+ this.setNativeFunctionPrototype(this.STRING, 'search', wrapper);
+
+ wrapper = function(substr, newSubstr) {
+ // Support for function replacements is the responsibility of a polyfill.
+ if (thisInterpreter.isa(substr, thisInterpreter.REGEXP)) {
+ substr = substr.data;
+ }
+ return String(this).replace(substr, newSubstr);
+ };
+ this.setNativeFunctionPrototype(this.STRING, 'replace', wrapper);
+ // Add a polyfill to handle replace's second argument being a function.
+ this.polyfills_.push(
+"(function() {",
+ "var replace_ = String.prototype.replace;",
+ "String.prototype.replace = function(substr, newSubstr) {",
+ "if (typeof newSubstr !== 'function') {",
+ // string.replace(string|regexp, string)
+ "return replace_.call(this, substr, newSubstr);",
+ "}",
+ "var str = this;",
+ "if (substr instanceof RegExp) {", // string.replace(regexp, function)
+ "var subs = [];",
+ "var m = substr.exec(str);",
+ "while (m) {",
+ "m.push(m.index, str);",
+ "var inject = newSubstr.apply(null, m);",
+ "subs.push([m.index, m[0].length, inject]);",
+ "m = substr.global ? substr.exec(str) : null;",
+ "}",
+ "for (var i = subs.length - 1; i >= 0; i--) {",
+ "str = str.substring(0, subs[i][0]) + subs[i][2] + " +
+ "str.substring(subs[i][0] + subs[i][1]);",
+ "}",
+ "} else {", // string.replace(string, function)
+ "var i = str.indexOf(substr);",
+ "if (i !== -1) {",
+ "var inject = newSubstr(str.substr(i, substr.length), i, str);",
+ "str = str.substring(0, i) + inject + " +
+ "str.substring(i + substr.length);",
+ "}",
+ "}",
+ "return str;",
+ "};",
+"})();",
+"");
+};
+
+/**
+ * Initialize the Boolean class.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initBoolean = function(scope) {
+ var thisInterpreter = this;
+ var wrapper;
+ // Boolean constructor.
+ wrapper = function(value) {
+ value = Boolean(value);
+ if (thisInterpreter.calledWithNew()) {
+ // Called as new Boolean().
+ this.data = value;
+ return this;
+ } else {
+ // Called as Boolean().
+ return value;
+ }
+ };
+ this.BOOLEAN = this.createNativeFunction(wrapper, true);
+ this.setProperty(scope, 'Boolean', this.BOOLEAN);
+};
+
+/**
+ * Initialize the Number class.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initNumber = function(scope) {
+ var thisInterpreter = this;
+ var wrapper;
+ // Number constructor.
+ wrapper = function(value) {
+ value = Number(value);
+ if (thisInterpreter.calledWithNew()) {
+ // Called as new Number().
+ this.data = value;
+ return this;
+ } else {
+ // Called as Number().
+ return value;
+ }
+ };
+ this.NUMBER = this.createNativeFunction(wrapper, true);
+ this.setProperty(scope, 'Number', this.NUMBER);
+
+ var numConsts = ['MAX_VALUE', 'MIN_VALUE', 'NaN', 'NEGATIVE_INFINITY',
+ 'POSITIVE_INFINITY'];
+ for (var i = 0; i < numConsts.length; i++) {
+ this.setProperty(this.NUMBER, numConsts[i], Number[numConsts[i]],
+ Interpreter.READONLY_NONENUMERABLE_DESCRIPTOR);
+ }
+
+ // Instance methods on Number.
+ wrapper = function(fractionDigits) {
+ try {
+ return Number(this).toExponential(fractionDigits);
+ } catch (e) {
+ // Throws if fractionDigits isn't within 0-20.
+ thisInterpreter.throwException(thisInterpreter.ERROR, e.message);
+ }
+ };
+ this.setNativeFunctionPrototype(this.NUMBER, 'toExponential', wrapper);
+
+ wrapper = function(digits) {
+ try {
+ return Number(this).toFixed(digits);
+ } catch (e) {
+ // Throws if digits isn't within 0-20.
+ thisInterpreter.throwException(thisInterpreter.ERROR, e.message);
+ }
+ };
+ this.setNativeFunctionPrototype(this.NUMBER, 'toFixed', wrapper);
+
+ wrapper = function(precision) {
+ try {
+ return Number(this).toPrecision(precision);
+ } catch (e) {
+ // Throws if precision isn't within range (depends on implementation).
+ thisInterpreter.throwException(thisInterpreter.ERROR, e.message);
+ }
+ };
+ this.setNativeFunctionPrototype(this.NUMBER, 'toPrecision', wrapper);
+
+ wrapper = function(radix) {
+ try {
+ return Number(this).toString(radix);
+ } catch (e) {
+ // Throws if radix isn't within 2-36.
+ thisInterpreter.throwException(thisInterpreter.ERROR, e.message);
+ }
+ };
+ this.setNativeFunctionPrototype(this.NUMBER, 'toString', wrapper);
+
+ wrapper = function(locales, options) {
+ locales = locales ? thisInterpreter.pseudoToNative(locales) : undefined;
+ options = options ? thisInterpreter.pseudoToNative(options) : undefined;
+ return Number(this).toLocaleString(locales, options);
+ };
+ this.setNativeFunctionPrototype(this.NUMBER, 'toLocaleString', wrapper);
+};
+
+/**
+ * Initialize the Date class.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initDate = function(scope) {
+ var thisInterpreter = this;
+ var wrapper;
+ // Date constructor.
+ wrapper = function(value, var_args) {
+ if (!thisInterpreter.calledWithNew()) {
+ // Called as Date().
+ // Calling Date() as a function returns a string, no arguments are heeded.
+ return Date();
+ }
+ // Called as new Date().
+ var args = [null].concat(Array.from(arguments));
+ this.data = new (Function.prototype.bind.apply(Date, args));
+ return this;
+ };
+ this.DATE = this.createNativeFunction(wrapper, true);
+ this.DATE_PROTO = this.DATE.properties['prototype'];
+ this.setProperty(scope, 'Date', this.DATE);
+
+ // Static methods on Date.
+ this.setProperty(this.DATE, 'now', this.createNativeFunction(Date.now, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ this.setProperty(this.DATE, 'parse',
+ this.createNativeFunction(Date.parse, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ this.setProperty(this.DATE, 'UTC', this.createNativeFunction(Date.UTC, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ // Instance methods on Date.
+ var functions = ['getDate', 'getDay', 'getFullYear', 'getHours',
+ 'getMilliseconds', 'getMinutes', 'getMonth', 'getSeconds', 'getTime',
+ 'getTimezoneOffset', 'getUTCDate', 'getUTCDay', 'getUTCFullYear',
+ 'getUTCHours', 'getUTCMilliseconds', 'getUTCMinutes', 'getUTCMonth',
+ 'getUTCSeconds', 'getYear',
+ 'setDate', 'setFullYear', 'setHours', 'setMilliseconds',
+ 'setMinutes', 'setMonth', 'setSeconds', 'setTime', 'setUTCDate',
+ 'setUTCFullYear', 'setUTCHours', 'setUTCMilliseconds', 'setUTCMinutes',
+ 'setUTCMonth', 'setUTCSeconds', 'setYear',
+ 'toDateString', 'toISOString', 'toJSON', 'toGMTString',
+ 'toLocaleDateString', 'toLocaleString', 'toLocaleTimeString',
+ 'toTimeString', 'toUTCString'];
+ for (var i = 0; i < functions.length; i++) {
+ wrapper = (function(nativeFunc) {
+ return function(var_args) {
+ var args = [];
+ for (var i = 0; i < arguments.length; i++) {
+ args[i] = thisInterpreter.pseudoToNative(arguments[i]);
+ }
+ return this.data[nativeFunc].apply(this.data, args);
+ };
+ })(functions[i]);
+ this.setNativeFunctionPrototype(this.DATE, functions[i], wrapper);
+ }
+};
+
+/**
+ * Initialize Regular Expression object.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initRegExp = function(scope) {
+ var thisInterpreter = this;
+ var wrapper;
+ // RegExp constructor.
+ wrapper = function(pattern, flags) {
+ if (thisInterpreter.calledWithNew()) {
+ // Called as new RegExp().
+ var rgx = this;
+ } else {
+ // Called as RegExp().
+ var rgx = thisInterpreter.createObjectProto(thisInterpreter.REGEXP_PROTO);
+ }
+ pattern = pattern ? pattern.toString() : '';
+ flags = flags ? flags.toString() : '';
+ thisInterpreter.populateRegExp(rgx, new RegExp(pattern, flags));
+ return rgx;
+ };
+ this.REGEXP = this.createNativeFunction(wrapper, true);
+ this.REGEXP_PROTO = this.REGEXP.properties['prototype'];
+ this.setProperty(scope, 'RegExp', this.REGEXP);
+
+ this.setProperty(this.REGEXP.properties['prototype'], 'global', undefined,
+ Interpreter.READONLY_NONENUMERABLE_DESCRIPTOR);
+ this.setProperty(this.REGEXP.properties['prototype'], 'ignoreCase', undefined,
+ Interpreter.READONLY_NONENUMERABLE_DESCRIPTOR);
+ this.setProperty(this.REGEXP.properties['prototype'], 'multiline', undefined,
+ Interpreter.READONLY_NONENUMERABLE_DESCRIPTOR);
+ this.setProperty(this.REGEXP.properties['prototype'], 'source', '(?:)',
+ Interpreter.READONLY_NONENUMERABLE_DESCRIPTOR);
+
+ wrapper = function(str) {
+ return this.data.test(str);
+ };
+ this.setNativeFunctionPrototype(this.REGEXP, 'test', wrapper);
+
+ wrapper = function(str) {
+ str = str.toString();
+ // Get lastIndex from wrapped regex, since this is settable.
+ this.data.lastIndex =
+ Number(thisInterpreter.getProperty(this, 'lastIndex'));
+ var match = this.data.exec(str);
+ thisInterpreter.setProperty(this, 'lastIndex', this.data.lastIndex);
+
+ if (match) {
+ var result =
+ thisInterpreter.createObjectProto(thisInterpreter.ARRAY_PROTO);
+ for (var i = 0; i < match.length; i++) {
+ thisInterpreter.setProperty(result, i, match[i]);
+ }
+ // match has additional properties.
+ thisInterpreter.setProperty(result, 'index', match.index);
+ thisInterpreter.setProperty(result, 'input', match.input);
+ return result;
+ }
+ return null;
+ };
+ this.setNativeFunctionPrototype(this.REGEXP, 'exec', wrapper);
+};
+
+/**
+ * Initialize the Error class.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initError = function(scope) {
+ var thisInterpreter = this;
+ // Error constructor.
+ this.ERROR = this.createNativeFunction(function(opt_message) {
+ if (thisInterpreter.calledWithNew()) {
+ // Called as new Error().
+ var newError = this;
+ } else {
+ // Called as Error().
+ var newError = thisInterpreter.createObject(thisInterpreter.ERROR);
+ }
+ if (opt_message) {
+ thisInterpreter.setProperty(newError, 'message', String(opt_message),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+ }
+ return newError;
+ }, true);
+ this.setProperty(scope, 'Error', this.ERROR);
+ this.setProperty(this.ERROR.properties['prototype'], 'message', '',
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+ this.setProperty(this.ERROR.properties['prototype'], 'name', 'Error',
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+
+ var createErrorSubclass = function(name) {
+ var constructor = thisInterpreter.createNativeFunction(
+ function(opt_message) {
+ if (thisInterpreter.calledWithNew()) {
+ // Called as new XyzError().
+ var newError = this;
+ } else {
+ // Called as XyzError().
+ var newError = thisInterpreter.createObject(constructor);
+ }
+ if (opt_message) {
+ thisInterpreter.setProperty(newError, 'message',
+ String(opt_message), Interpreter.NONENUMERABLE_DESCRIPTOR);
+ }
+ return newError;
+ }, true);
+ thisInterpreter.setProperty(constructor, 'prototype',
+ thisInterpreter.createObject(thisInterpreter.ERROR));
+ thisInterpreter.setProperty(constructor.properties['prototype'], 'name',
+ name, Interpreter.NONENUMERABLE_DESCRIPTOR);
+ thisInterpreter.setProperty(scope, name, constructor);
+
+ return constructor;
+ };
+
+ this.EVAL_ERROR = createErrorSubclass('EvalError');
+ this.RANGE_ERROR = createErrorSubclass('RangeError');
+ this.REFERENCE_ERROR = createErrorSubclass('ReferenceError');
+ this.SYNTAX_ERROR = createErrorSubclass('SyntaxError');
+ this.TYPE_ERROR = createErrorSubclass('TypeError');
+ this.URI_ERROR = createErrorSubclass('URIError');
+};
+
+/**
+ * Initialize Math object.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initMath = function(scope) {
+ var thisInterpreter = this;
+ var myMath = this.createObjectProto(this.OBJECT_PROTO);
+ this.setProperty(scope, 'Math', myMath);
+ var mathConsts = ['E', 'LN2', 'LN10', 'LOG2E', 'LOG10E', 'PI',
+ 'SQRT1_2', 'SQRT2'];
+ for (var i = 0; i < mathConsts.length; i++) {
+ this.setProperty(myMath, mathConsts[i], Math[mathConsts[i]],
+ Interpreter.READONLY_NONENUMERABLE_DESCRIPTOR);
+ }
+ var numFunctions = ['abs', 'acos', 'asin', 'atan', 'atan2', 'ceil', 'cos',
+ 'exp', 'floor', 'log', 'max', 'min', 'pow', 'random',
+ 'round', 'sin', 'sqrt', 'tan'];
+ for (var i = 0; i < numFunctions.length; i++) {
+ this.setProperty(myMath, numFunctions[i],
+ this.createNativeFunction(Math[numFunctions[i]], false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+ }
+};
+
+/**
+ * Initialize JSON object.
+ * @param {!Interpreter.Object} scope Global scope.
+ */
+Interpreter.prototype.initJSON = function(scope) {
+ var thisInterpreter = this;
+ var myJSON = thisInterpreter.createObjectProto(this.OBJECT_PROTO);
+ this.setProperty(scope, 'JSON', myJSON);
+
+ var wrapper = function(text) {
+ try {
+ var nativeObj = JSON.parse(text.toString());
+ } catch (e) {
+ thisInterpreter.throwException(thisInterpreter.SYNTAX_ERROR, e.message);
+ }
+ return thisInterpreter.nativeToPseudo(nativeObj);
+ };
+ this.setProperty(myJSON, 'parse', this.createNativeFunction(wrapper, false));
+
+ wrapper = function(value) {
+ var nativeObj = thisInterpreter.pseudoToNative(value);
+ try {
+ var str = JSON.stringify(nativeObj);
+ } catch (e) {
+ thisInterpreter.throwException(thisInterpreter.TYPE_ERROR, e.message);
+ }
+ return str;
+ };
+ this.setProperty(myJSON, 'stringify',
+ this.createNativeFunction(wrapper, false));
+};
+
+/**
+ * Is an object of a certain class?
+ * @param {Interpreter.Value} child Object to check.
+ * @param {Interpreter.Object} constructor Constructor of object.
+ * @return {boolean} True if object is the class or inherits from it.
+ * False otherwise.
+ */
+Interpreter.prototype.isa = function(child, constructor) {
+ if (child === null || child === undefined || !constructor) {
+ return false;
+ }
+ var proto = constructor.properties['prototype'];
+ if (child === proto) {
+ return true;
+ }
+ // The first step up the prototype chain is harder since the child might be
+ // a primitive value. Subsequent steps can just follow the .proto property.
+ child = this.getPrototype(child);
+ while (child) {
+ if (child === proto) {
+ return true;
+ }
+ child = child.proto;
+ }
+ return false;
+};
+
+/**
+ * Is a value a legal integer for an array length?
+ * @param {Interpreter.Value} x Value to check.
+ * @return {number} Zero, or a positive integer if the value can be
+ * converted to such. NaN otherwise.
+ */
+Interpreter.legalArrayLength = function(x) {
+ var n = x >>> 0;
+ // Array length must be between 0 and 2^32-1 (inclusive).
+ return (n === Number(x)) ? n : NaN;
+};
+
+/**
+ * Is a value a legal integer for an array index?
+ * @param {Interpreter.Value} x Value to check.
+ * @return {number} Zero, or a positive integer if the value can be
+ * converted to such. NaN otherwise.
+ */
+Interpreter.legalArrayIndex = function(x) {
+ var n = x >>> 0;
+ // Array index cannot be 2^32-1, otherwise length would be 2^32.
+ // 0xffffffff is 2^32-1.
+ return (String(n) === String(x) && n !== 0xffffffff) ? n : NaN;
+};
+
+/**
+ * Typedef for JS values.
+ * @typedef {!Interpreter.Object|boolean|number|string|undefined|null}
+ */
+Interpreter.Value;
+
+/**
+ * Class for an object.
+ * @param {Interpreter.Object} proto Prototype object or null.
+ * @constructor
+ */
+Interpreter.Object = function(proto) {
+ this.getter = Object.create(null);
+ this.setter = Object.create(null);
+ this.properties = Object.create(null);
+ this.proto = proto;
+};
+
+/** @type {Interpreter.Object} */
+Interpreter.Object.prototype.proto = null;
+
+/** @type {boolean} */
+Interpreter.Object.prototype.isObject = true;
+
+/** @type {string} */
+Interpreter.Object.prototype.class = 'Object';
+
+/** @type {Date|RegExp|boolean|number|string|undefined|null} */
+Interpreter.Object.prototype.data = null;
+
+/**
+ * Convert this object into a string.
+ * @return {string} String value.
+ * @override
+ */
+Interpreter.Object.prototype.toString = function() {
+ if (this.class === 'Array') {
+ // Array
+ var cycles = Interpreter.toStringCycles_;
+ cycles.push(this);
+ try {
+ var strs = [];
+ for (var i = 0; i < this.properties.length; i++) {
+ var value = this.properties[i];
+ strs[i] = (value && value.isObject && cycles.indexOf(value) !== -1) ?
+ '...' : value;
+ }
+ } finally {
+ cycles.pop();
+ }
+ return strs.join(',');
+ }
+ if (this.class === 'Error') {
+ var cycles = Interpreter.toStringCycles_;
+ if (cycles.indexOf(this) !== -1) {
+ return '[object Error]';
+ }
+ var name, message;
+ // Bug: Does not support getters and setters for name or message.
+ var obj = this;
+ do {
+ if ('name' in obj.properties) {
+ name = obj.properties['name'];
+ break;
+ }
+ } while ((obj = obj.proto));
+ var obj = this;
+ do {
+ if ('message' in obj.properties) {
+ message = obj.properties['message'];
+ break;
+ }
+ } while ((obj = obj.proto));
+ cycles.push(this);
+ try {
+ name = name && name.toString();
+ message = message && message.toString();
+ } finally {
+ cycles.pop();
+ }
+ return message ? name + ': ' + message : String(name);
+ }
+
+ // RegExp, Date, and boxed primitives.
+ if (this.data !== null) {
+ return String(this.data);
+ }
+
+ return '[object ' + this.class + ']';
+};
+
+/**
+ * Return the object's value.
+ * @return {Interpreter.Value} Value.
+ * @override
+ */
+Interpreter.Object.prototype.valueOf = function() {
+ if (this.data === undefined || this.data === null ||
+ this.data instanceof RegExp) {
+ return this; // An Object.
+ }
+ if (this.data instanceof Date) {
+ return this.data.valueOf(); // Milliseconds.
+ }
+ return /** @type {(boolean|number|string)} */ (this.data); // Boxed primitive.
+};
+
+/**
+ * Create a new data object based on a constructor's prototype.
+ * @param {Interpreter.Object} constructor Parent constructor function,
+ * or null if scope object.
+ * @return {!Interpreter.Object} New data object.
+ */
+Interpreter.prototype.createObject = function(constructor) {
+ return this.createObjectProto(constructor &&
+ constructor.properties['prototype']);
+};
+
+/**
+ * Create a new data object based on a prototype.
+ * @param {Interpreter.Object} proto Prototype object.
+ * @return {!Interpreter.Object} New data object.
+ */
+Interpreter.prototype.createObjectProto = function(proto) {
+ if (typeof proto !== 'object') {
+ throw Error('Non object prototype');
+ }
+ var obj = new Interpreter.Object(proto);
+ // Functions have prototype objects.
+ if (this.isa(obj, this.FUNCTION)) {
+ this.setProperty(obj, 'prototype',
+ this.createObjectProto(this.OBJECT_PROTO || null));
+ obj.class = 'Function';
+ }
+ // Arrays have length.
+ if (this.isa(obj, this.ARRAY)) {
+ this.setProperty(obj, 'length', 0,
+ {configurable: false, enumerable: false, writable: true});
+ obj.class = 'Array';
+ }
+ if (this.isa(obj, this.ERROR)) {
+ obj.class = 'Error';
+ }
+ return obj;
+};
+
+/**
+ * Initialize a pseudo regular expression object based on a native regular
+ * expression object.
+ * @param {!Interpreter.Object} pseudoRegexp The existing object to set.
+ * @param {!RegExp} nativeRegexp The native regular expression.
+ */
+Interpreter.prototype.populateRegExp = function(pseudoRegexp, nativeRegexp) {
+ pseudoRegexp.data = nativeRegexp;
+ // lastIndex is settable, all others are read-only attributes
+ this.setProperty(pseudoRegexp, 'lastIndex', nativeRegexp.lastIndex,
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+ this.setProperty(pseudoRegexp, 'source', nativeRegexp.source,
+ Interpreter.READONLY_NONENUMERABLE_DESCRIPTOR);
+ this.setProperty(pseudoRegexp, 'global', nativeRegexp.global,
+ Interpreter.READONLY_NONENUMERABLE_DESCRIPTOR);
+ this.setProperty(pseudoRegexp, 'ignoreCase', nativeRegexp.ignoreCase,
+ Interpreter.READONLY_NONENUMERABLE_DESCRIPTOR);
+ this.setProperty(pseudoRegexp, 'multiline', nativeRegexp.multiline,
+ Interpreter.READONLY_NONENUMERABLE_DESCRIPTOR);
+};
+
+/**
+ * Create a new function.
+ * @param {!Object} node AST node defining the function.
+ * @param {!Object} scope Parent scope.
+ * @return {!Interpreter.Object} New function.
+ */
+Interpreter.prototype.createFunction = function(node, scope) {
+ var func = this.createObjectProto(this.FUNCTION_PROTO);
+ func.parentScope = scope;
+ func.node = node;
+ this.setProperty(func, 'length', func.node['params'].length,
+ Interpreter.READONLY_DESCRIPTOR);
+ return func;
+};
+
+/**
+ * Create a new native function.
+ * @param {!Function} nativeFunc JavaScript function.
+ * @param {boolean=} opt_constructor If true, the function's
+ * prototype will have its constructor property set to the function.
+ * If false, the function cannot be called as a constructor (e.g. escape).
+ * Defaults to undefined.
+ * @return {!Interpreter.Object} New function.
+ */
+Interpreter.prototype.createNativeFunction =
+ function(nativeFunc, opt_constructor) {
+ var func = this.createObjectProto(this.FUNCTION_PROTO);
+ func.nativeFunc = nativeFunc;
+ nativeFunc.id = this.functionCounter_++;
+ this.setProperty(func, 'length', nativeFunc.length,
+ Interpreter.READONLY_DESCRIPTOR);
+ if (opt_constructor) {
+ this.setProperty(func.properties['prototype'], 'constructor', func,
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+ } else if (opt_constructor === false) {
+ func.illegalConstructor = true;
+ this.setProperty(func, 'prototype', undefined);
+ }
+ return func;
+};
+
+/**
+ * Create a new native asynchronous function.
+ * @param {!Function} asyncFunc JavaScript function.
+ * @return {!Interpreter.Object} New function.
+ */
+Interpreter.prototype.createAsyncFunction = function(asyncFunc) {
+ var func = this.createObjectProto(this.FUNCTION_PROTO);
+ func.asyncFunc = asyncFunc;
+ asyncFunc.id = this.functionCounter_++;
+ this.setProperty(func, 'length', asyncFunc.length,
+ Interpreter.READONLY_DESCRIPTOR);
+ return func;
+};
+
+/**
+ * Converts from a native JS object or value to a JS interpreter object.
+ * Can handle JSON-style values, does NOT handle cycles.
+ * @param {*} nativeObj The native JS object to be converted.
+ * @return {Interpreter.Value} The equivalent JS interpreter object.
+ */
+Interpreter.prototype.nativeToPseudo = function(nativeObj) {
+ if ((typeof nativeObj !== 'object' && typeof nativeObj !== 'function') ||
+ nativeObj === null) {
+ return nativeObj;
+ }
+
+ if (nativeObj instanceof RegExp) {
+ var pseudoRegexp = this.createObjectProto(this.REGEXP_PROTO);
+ this.populateRegExp(pseudoRegexp, nativeObj);
+ return pseudoRegexp;
+ }
+
+ if (nativeObj instanceof Date) {
+ var pseudoDate = this.createObjectProto(this.DATE_PROTO);
+ pseudoDate.data = nativeObj;
+ return pseudoDate;
+ }
+
+ if (nativeObj instanceof Function) {
+ var interpreter = this;
+ var wrapper = function() {
+ return interpreter.nativeToPseudo(
+ nativeObj.apply(interpreter,
+ Array.prototype.slice.call(arguments)
+ .map(function(i) {
+ return interpreter.pseudoToNative(i);
+ })
+ )
+ );
+ };
+ return this.createNativeFunction(wrapper, undefined);
+ }
+
+ var pseudoObj;
+ if (Array.isArray(nativeObj)) { // Array.
+ pseudoObj = this.createObjectProto(this.ARRAY_PROTO);
+ for (var i = 0; i < nativeObj.length; i++) {
+ if (i in nativeObj) {
+ this.setProperty(pseudoObj, i, this.nativeToPseudo(nativeObj[i]));
+ }
+ }
+ } else { // Object.
+ pseudoObj = this.createObjectProto(this.OBJECT_PROTO);
+ for (var key in nativeObj) {
+ this.setProperty(pseudoObj, key, this.nativeToPseudo(nativeObj[key]));
+ }
+ }
+ return pseudoObj;
+};
+
+/**
+ * Converts from a JS interpreter object to native JS object.
+ * Can handle JSON-style values, plus cycles.
+ * @param {Interpreter.Value} pseudoObj The JS interpreter object to be
+ * converted.
+ * @param {Object=} opt_cycles Cycle detection (used in recursive calls).
+ * @return {*} The equivalent native JS object or value.
+ */
+Interpreter.prototype.pseudoToNative = function(pseudoObj, opt_cycles) {
+ if ((typeof pseudoObj !== 'object' && typeof pseudoObj !== 'function') ||
+ pseudoObj === null) {
+ return pseudoObj;
+ }
+
+ if (this.isa(pseudoObj, this.REGEXP)) { // Regular expression.
+ return pseudoObj.data;
+ }
+
+ if (this.isa(pseudoObj, this.DATE)) { // Date.
+ return pseudoObj.data;
+ }
+
+ var cycles = opt_cycles || {
+ pseudo: [],
+ native: []
+ };
+ var i = cycles.pseudo.indexOf(pseudoObj);
+ if (i !== -1) {
+ return cycles.native[i];
+ }
+ cycles.pseudo.push(pseudoObj);
+ var nativeObj;
+ if (this.isa(pseudoObj, this.ARRAY)) { // Array.
+ nativeObj = [];
+ cycles.native.push(nativeObj);
+ var length = this.getProperty(pseudoObj, 'length');
+ for (var i = 0; i < length; i++) {
+ if (this.hasProperty(pseudoObj, i)) {
+ nativeObj[i] =
+ this.pseudoToNative(this.getProperty(pseudoObj, i), cycles);
+ }
+ }
+ } else { // Object.
+ nativeObj = {};
+ cycles.native.push(nativeObj);
+ var val;
+ for (var key in pseudoObj.properties) {
+ val = pseudoObj.properties[key];
+ nativeObj[key] = this.pseudoToNative(val, cycles);
+ }
+ }
+ cycles.pseudo.pop();
+ cycles.native.pop();
+ return nativeObj;
+};
+
+/**
+ * Converts from a native JS array to a JS interpreter array.
+ * Does handle non-numeric properties (like str.match's index prop).
+ * Does NOT recurse into the array's contents.
+ * @param {!Array} nativeArray The JS array to be converted.
+ * @return {!Interpreter.Object} The equivalent JS interpreter array.
+ */
+Interpreter.prototype.arrayNativeToPseudo = function(nativeArray) {
+ var pseudoArray = this.createObjectProto(this.ARRAY_PROTO);
+ var props = Object.getOwnPropertyNames(nativeArray);
+ for (var i = 0; i < props.length; i++) {
+ this.setProperty(pseudoArray, props[i], nativeArray[props[i]]);
+ }
+ return pseudoArray;
+};
+
+/**
+ * Converts from a JS interpreter array to native JS array.
+ * Does handle non-numeric properties (like str.match's index prop).
+ * Does NOT recurse into the array's contents.
+ * @param {!Interpreter.Object} pseudoArray The JS interpreter array,
+ * or JS interpreter object pretending to be an array.
+ * @return {!Array} The equivalent native JS array.
+ */
+Interpreter.prototype.arrayPseudoToNative = function(pseudoArray) {
+ var nativeArray = [];
+ for (var key in pseudoArray.properties) {
+ nativeArray[key] = this.getProperty(pseudoArray, key);
+ }
+ // pseudoArray might be an object pretending to be an array. In this case
+ // it's possible that length is non-existent, invalid, or smaller than the
+ // largest defined numeric property. Set length explicitly here.
+ nativeArray.length = Interpreter.legalArrayLength(
+ this.getProperty(pseudoArray, 'length')) || 0;
+ return nativeArray;
+};
+
+/**
+ * Look up the prototype for this value.
+ * @param {Interpreter.Value} value Data object.
+ * @return {Interpreter.Object} Prototype object, null if none.
+ */
+Interpreter.prototype.getPrototype = function(value) {
+ switch (typeof value) {
+ case 'number':
+ return this.NUMBER.properties['prototype'];
+ case 'boolean':
+ return this.BOOLEAN.properties['prototype'];
+ case 'string':
+ return this.STRING.properties['prototype'];
+ }
+ if (value) {
+ return value.proto;
+ }
+ return null;
+};
+
+/**
+ * Fetch a property value from a data object.
+ * @param {Interpreter.Value} obj Data object.
+ * @param {Interpreter.Value} name Name of property.
+ * @return {Interpreter.Value} Property value (may be undefined).
+ */
+Interpreter.prototype.getProperty = function(obj, name) {
+ name = String(name);
+ if (obj === undefined || obj === null) {
+ this.throwException(this.TYPE_ERROR,
+ "Cannot read property '" + name + "' of " + obj);
+ }
+ if (name === 'length') {
+ // Special cases for magic length property.
+ if (this.isa(obj, this.STRING)) {
+ return String(obj).length;
+ }
+ } else if (name.charCodeAt(0) < 0x40) {
+ // Might have numbers in there?
+ // Special cases for string array indexing
+ if (this.isa(obj, this.STRING)) {
+ var n = Interpreter.legalArrayIndex(name);
+ if (!isNaN(n) && n < String(obj).length) {
+ return String(obj)[n];
+ }
+ }
+ }
+ do {
+ if (obj.properties && name in obj.properties) {
+ var getter = obj.getter[name];
+ if (getter) {
+ // Flag this function as being a getter and thus needing immediate
+ // execution (rather than being the value of the property).
+ getter.isGetter = true;
+ return getter;
+ }
+ return obj.properties[name];
+ }
+ } while ((obj = this.getPrototype(obj)));
+ return undefined;
+};
+
+/**
+ * Does the named property exist on a data object.
+ * @param {Interpreter.Value} obj Data object.
+ * @param {Interpreter.Value} name Name of property.
+ * @return {boolean} True if property exists.
+ */
+Interpreter.prototype.hasProperty = function(obj, name) {
+ if (!obj.isObject) {
+ throw TypeError('Primitive data type has no properties');
+ }
+ name = String(name);
+ if (name === 'length' && this.isa(obj, this.STRING)) {
+ return true;
+ }
+ if (this.isa(obj, this.STRING)) {
+ var n = Interpreter.legalArrayIndex(name);
+ if (!isNaN(n) && n < String(obj).length) {
+ return true;
+ }
+ }
+ do {
+ if (obj.properties && name in obj.properties) {
+ return true;
+ }
+ } while ((obj = this.getPrototype(obj)));
+ return false;
+};
+
+/**
+ * Set a property value on a data object.
+ * @param {!Interpreter.Object} obj Data object.
+ * @param {Interpreter.Value} name Name of property.
+ * @param {Interpreter.Value} value New property value.
+ * Use Interpreter.VALUE_IN_DESCRIPTOR if value is handled by
+ * descriptor instead.
+ * @param {Object=} opt_descriptor Optional descriptor object.
+ * @return {!Interpreter.Object|undefined} Returns a setter function if one
+ * needs to be called, otherwise undefined.
+ */
+Interpreter.prototype.setProperty = function(obj, name, value, opt_descriptor) {
+ name = String(name);
+ if (obj === undefined || obj === null) {
+ this.throwException(this.TYPE_ERROR,
+ "Cannot set property '" + name + "' of " + obj);
+ }
+ if (opt_descriptor && ('get' in opt_descriptor || 'set' in opt_descriptor) &&
+ ('value' in opt_descriptor || 'writable' in opt_descriptor)) {
+ this.throwException(this.TYPE_ERROR, 'Invalid property descriptor. ' +
+ 'Cannot both specify accessors and a value or writable attribute');
+ }
+ var strict = !this.stateStack || this.getScope().strict;
+ if (!obj.isObject) {
+ if (strict) {
+ this.throwException(this.TYPE_ERROR, "Can't create property '" + name +
+ "' on '" + obj + "'");
+ }
+ return;
+ }
+ if (this.isa(obj, this.STRING)) {
+ var n = Interpreter.legalArrayIndex(name);
+ if (name === 'length' || (!isNaN(n) && n < String(obj).length)) {
+ // Can't set length or letters on String objects.
+ if (strict) {
+ this.throwException(this.TYPE_ERROR, "Cannot assign to read only " +
+ "property '" + name + "' of String '" + obj.data + "'");
+ }
+ return;
+ }
+ }
+ if (obj.class === 'Array') {
+ // Arrays have a magic length variable that is bound to the elements.
+ var length = obj.properties.length;
+ var i;
+ if (name === 'length') {
+ // Delete elements if length is smaller.
+ if (opt_descriptor) {
+ if (!('value' in opt_descriptor)) {
+ return;
+ }
+ value = opt_descriptor.value;
+ }
+ value = Interpreter.legalArrayLength(value);
+ if (isNaN(value)) {
+ this.throwException(this.RANGE_ERROR, 'Invalid array length');
+ }
+ if (value < length) {
+ for (i in obj.properties) {
+ i = Interpreter.legalArrayIndex(i);
+ if (!isNaN(i) && value <= i) {
+ delete obj.properties[i];
+ }
+ }
+ }
+ } else if (!isNaN(i = Interpreter.legalArrayIndex(name))) {
+ // Increase length if this index is larger.
+ obj.properties.length = Math.max(length, i + 1);
+ }
+ }
+ if (obj.preventExtensions && !(name in obj.properties)) {
+ if (strict) {
+ this.throwException(this.TYPE_ERROR, "Can't add property '" + name +
+ "', object is not extensible");
+ }
+ return;
+ }
+ if (opt_descriptor) {
+ // Define the property.
+ if ('get' in opt_descriptor) {
+ if (opt_descriptor.get) {
+ obj.getter[name] = opt_descriptor.get;
+ } else {
+ delete obj.getter[name];
+ }
+ }
+ if ('set' in opt_descriptor) {
+ if (opt_descriptor.set) {
+ obj.setter[name] = opt_descriptor.set;
+ } else {
+ delete obj.setter[name];
+ }
+ }
+ var descriptor = {};
+ if ('configurable' in opt_descriptor) {
+ descriptor.configurable = opt_descriptor.configurable;
+ }
+ if ('enumerable' in opt_descriptor) {
+ descriptor.enumerable = opt_descriptor.enumerable;
+ }
+ if ('writable' in opt_descriptor) {
+ descriptor.writable = opt_descriptor.writable;
+ delete obj.getter[name];
+ delete obj.setter[name];
+ }
+ if ('value' in opt_descriptor) {
+ descriptor.value = opt_descriptor.value;
+ delete obj.getter[name];
+ delete obj.setter[name];
+ } else if (value !== Interpreter.VALUE_IN_DESCRIPTOR) {
+ descriptor.value = value;
+ delete obj.getter[name];
+ delete obj.setter[name];
+ }
+ try {
+ Object.defineProperty(obj.properties, name, descriptor);
+ } catch (e) {
+ this.throwException(this.TYPE_ERROR, 'Cannot redefine property: ' + name);
+ }
+ } else {
+ // Set the property.
+ if (value === Interpreter.VALUE_IN_DESCRIPTOR) {
+ throw ReferenceError('Value not specified.');
+ }
+ // Determine the parent (possibly self) where the property is defined.
+ var defObj = obj;
+ while (!(name in defObj.properties)) {
+ defObj = this.getPrototype(defObj);
+ if (!defObj) {
+ // This is a new property.
+ defObj = obj;
+ break;
+ }
+ }
+ if (defObj.setter && defObj.setter[name]) {
+ return defObj.setter[name];
+ }
+ if (defObj.getter && defObj.getter[name]) {
+ if (strict) {
+ this.throwException(this.TYPE_ERROR, "Cannot set property '" + name +
+ "' of object '" + obj + "' which only has a getter");
+ }
+ } else {
+ // No setter, simple assignment.
+ try {
+ obj.properties[name] = value;
+ } catch (e) {
+ if (strict) {
+ this.throwException(this.TYPE_ERROR, "Cannot assign to read only " +
+ "property '" + name + "' of object '" + obj + "'");
+ }
+ }
+ }
+ }
+};
+
+/**
+ * Convenience method for adding a native function as a non-enumerable property
+ * onto an object's prototype.
+ * @param {!Interpreter.Object} obj Data object.
+ * @param {Interpreter.Value} name Name of property.
+ * @param {!Function} wrapper Function object.
+ */
+Interpreter.prototype.setNativeFunctionPrototype =
+ function(obj, name, wrapper) {
+ this.setProperty(obj.properties['prototype'], name,
+ this.createNativeFunction(wrapper, false),
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+};
+
+/**
+ * Returns the current scope from the stateStack.
+ * @return {!Interpreter.Object} Current scope dictionary.
+ */
+Interpreter.prototype.getScope = function() {
+ var scope = this.stateStack[this.stateStack.length - 1].scope;
+ if (!scope) {
+ throw Error('No scope found.');
+ }
+ return scope;
+};
+
+/**
+ * Create a new scope dictionary.
+ * @param {!Object} node AST node defining the scope container
+ * (e.g. a function).
+ * @param {Interpreter.Object} parentScope Scope to link to.
+ * @return {!Interpreter.Object} New scope.
+ */
+Interpreter.prototype.createScope = function(node, parentScope) {
+ var scope = this.createObjectProto(null);
+ scope.parentScope = parentScope;
+ if (!parentScope) {
+ this.initGlobalScope(scope);
+ }
+ this.populateScope_(node, scope);
+
+ // Determine if this scope starts with 'use strict'.
+ scope.strict = false;
+ if (parentScope && parentScope.strict) {
+ scope.strict = true;
+ } else {
+ var firstNode = node['body'] && node['body'][0];
+ if (firstNode && firstNode.expression &&
+ firstNode.expression['type'] === 'Literal' &&
+ firstNode.expression.value === 'use strict') {
+ scope.strict = true;
+ }
+ }
+ return scope;
+};
+
+/**
+ * Create a new special scope dictionary. Similar to createScope(), but
+ * doesn't assume that the scope is for a function body.
+ * This is used for 'catch' clauses and 'with' statements.
+ * @param {!Interpreter.Object} parentScope Scope to link to.
+ * @param {Interpreter.Object=} opt_scope Optional object to transform into
+ * scope.
+ * @return {!Interpreter.Object} New scope.
+ */
+Interpreter.prototype.createSpecialScope = function(parentScope, opt_scope) {
+ if (!parentScope) {
+ throw Error('parentScope required');
+ }
+ var scope = opt_scope || this.createObjectProto(null);
+ scope.parentScope = parentScope;
+ scope.strict = parentScope.strict;
+ return scope;
+};
+
+/**
+ * Retrieves a value from the scope chain.
+ * @param {string} name Name of variable.
+ * @return {Interpreter.Value} Any value.
+ * May be flagged as being a getter and thus needing immediate execution
+ * (rather than being the value of the property).
+ */
+Interpreter.prototype.getValueFromScope = function(name) {
+ var scope = this.getScope();
+ while (scope && scope !== this.global) {
+ if (name in scope.properties) {
+ return scope.properties[name];
+ }
+ scope = scope.parentScope;
+ }
+ // The root scope is also an object which has inherited properties and
+ // could also have getters.
+ if (scope === this.global && this.hasProperty(scope, name)) {
+ return this.getProperty(scope, name);
+ }
+ // Typeof operator is unique: it can safely look at non-defined variables.
+ var prevNode = this.stateStack[this.stateStack.length - 1].node;
+ if (prevNode['type'] === 'UnaryExpression' &&
+ prevNode['operator'] === 'typeof') {
+ return undefined;
+ }
+ this.throwException(this.REFERENCE_ERROR, name + ' is not defined');
+};
+
+/**
+ * Sets a value to the current scope.
+ * @param {string} name Name of variable.
+ * @param {Interpreter.Value} value Value.
+ * @return {!Interpreter.Object|undefined} Returns a setter function if one
+ * needs to be called, otherwise undefined.
+ */
+Interpreter.prototype.setValueToScope = function(name, value) {
+ var scope = this.getScope();
+ var strict = scope.strict;
+ while (scope && scope !== this.global) {
+ if (name in scope.properties) {
+ scope.properties[name] = value;
+ return undefined;
+ }
+ scope = scope.parentScope;
+ }
+ // The root scope is also an object which has readonly properties and
+ // could also have setters.
+ if (scope === this.global && (!strict || this.hasProperty(scope, name))) {
+ return this.setProperty(scope, name, value);
+ }
+ this.throwException(this.REFERENCE_ERROR, name + ' is not defined');
+};
+
+/**
+ * Create a new scope for the given node.
+ * @param {!Object} node AST node (program or function).
+ * @param {!Interpreter.Object} scope Scope dictionary to populate.
+ * @private
+ */
+Interpreter.prototype.populateScope_ = function(node, scope) {
+ if (node['type'] === 'VariableDeclaration') {
+ for (var i = 0; i < node['declarations'].length; i++) {
+ this.setProperty(scope, node['declarations'][i]['id']['name'],
+ undefined, Interpreter.VARIABLE_DESCRIPTOR);
+ }
+ } else if (node['type'] === 'FunctionDeclaration') {
+ this.setProperty(scope, node['id']['name'],
+ this.createFunction(node, scope), Interpreter.VARIABLE_DESCRIPTOR);
+ return; // Do not recurse into function.
+ } else if (node['type'] === 'FunctionExpression') {
+ return; // Do not recurse into function.
+ } else if (node['type'] === 'ExpressionStatement') {
+ return; // Expressions can't contain variable/function declarations.
+ }
+ var nodeClass = node['constructor'];
+ for (var name in node) {
+ var prop = node[name];
+ if (prop && typeof prop === 'object') {
+ if (Array.isArray(prop)) {
+ for (var i = 0; i < prop.length; i++) {
+ if (prop[i] && prop[i].constructor === nodeClass) {
+ this.populateScope_(prop[i], scope);
+ }
+ }
+ } else {
+ if (prop.constructor === nodeClass) {
+ this.populateScope_(prop, scope);
+ }
+ }
+ }
+ }
+};
+
+/**
+ * Remove start and end values from AST, or set start and end values to a
+ * constant value. Used to remove highlighting from polyfills and to set
+ * highlighting in an eval to cover the entire eval expression.
+ * @param {!Object} node AST node.
+ * @param {number=} start Starting character of all nodes, or undefined.
+ * @param {number=} end Ending character of all nodes, or undefined.
+ * @private
+ */
+Interpreter.prototype.stripLocations_ = function(node, start, end) {
+ if (start) {
+ node['start'] = start;
+ } else {
+ delete node['start'];
+ }
+ if (end) {
+ node['end'] = end;
+ } else {
+ delete node['end'];
+ }
+ for (var name in node) {
+ if (node.hasOwnProperty(name)) {
+ var prop = node[name];
+ if (prop && typeof prop === 'object') {
+ this.stripLocations_(prop, start, end);
+ }
+ }
+ }
+};
+
+/**
+ * Is the current state directly being called with as a construction with 'new'.
+ * @return {boolean} True if 'new foo()', false if 'foo()'.
+ */
+Interpreter.prototype.calledWithNew = function() {
+ return this.stateStack[this.stateStack.length - 1].isConstructor;
+};
+
+/**
+ * Gets a value from the scope chain or from an object property.
+ * @param {!Array} ref Name of variable or object/propname tuple.
+ * @return {Interpreter.Value} Any value.
+ * May be flagged as being a getter and thus needing immediate execution
+ * (rather than being the value of the property).
+ */
+Interpreter.prototype.getValue = function(ref) {
+ if (ref[0] === Interpreter.SCOPE_REFERENCE) {
+ // A null/varname variable lookup.
+ return this.getValueFromScope(ref[1]);
+ } else {
+ // An obj/prop components tuple (foo.bar).
+ return this.getProperty(ref[0], ref[1]);
+ }
+};
+
+/**
+ * Sets a value to the scope chain or to an object property.
+ * @param {!Array} ref Name of variable or object/propname tuple.
+ * @param {Interpreter.Value} value Value.
+ * @return {!Interpreter.Object|undefined} Returns a setter function if one
+ * needs to be called, otherwise undefined.
+ */
+Interpreter.prototype.setValue = function(ref, value) {
+ if (ref[0] === Interpreter.SCOPE_REFERENCE) {
+ // A null/varname variable lookup.
+ return this.setValueToScope(ref[1], value);
+ } else {
+ // An obj/prop components tuple (foo.bar).
+ return this.setProperty(ref[0], ref[1], value);
+ }
+};
+
+/**
+ * Completion Value Types.
+ * @enum {number}
+ */
+ Interpreter.Completion = {
+ NORMAL: 0,
+ BREAK: 1,
+ CONTINUE: 2,
+ RETURN: 3,
+ THROW: 4
+ };
+
+/**
+ * Throw an exception in the interpreter that can be handled by an
+ * interpreter try/catch statement. If unhandled, a real exception will
+ * be thrown. Can be called with either an error class and a message, or
+ * with an actual object to be thrown.
+ * @param {!Interpreter.Object} errorClass Type of error (if message is
+ * provided) or the value to throw (if no message).
+ * @param {string=} opt_message Message being thrown.
+ */
+Interpreter.prototype.throwException = function(errorClass, opt_message) {
+ if (opt_message === undefined) {
+ var error = errorClass; // This is a value to throw, not an error class.
+ } else {
+ var error = this.createObject(errorClass);
+ this.setProperty(error, 'message', opt_message,
+ Interpreter.NONENUMERABLE_DESCRIPTOR);
+ }
+ this.unwind(Interpreter.Completion.THROW, error, undefined);
+ // Abort anything related to the current step.
+ throw Interpreter.STEP_ERROR;
+};
+
+/**
+ * Unwind the stack to the innermost relevant enclosing TryStatement,
+ * For/ForIn/WhileStatement or Call/NewExpression. If this results in
+ * the stack being completely unwound the thread will be terminated
+ * and the appropriate error being thrown.
+ * @param {Interpreter.Completion} type Completion type.
+ * @param {Interpreter.Value=} value Value computed, returned or thrown.
+ * @param {string=} label Target label for break or return.
+ */
+Interpreter.prototype.unwind = function(type, value, label) {
+ if (type === Interpreter.Completion.NORMAL) {
+ throw TypeError('Should not unwind for NORMAL completions');
+ }
+
+ for (var stack = this.stateStack; stack.length > 0; stack.pop()) {
+ var state = stack[stack.length - 1];
+ switch (state.node['type']) {
+ case 'TryStatement':
+ state.cv = {type: type, value: value, label: label};
+ return;
+ case 'CallExpression':
+ case 'NewExpression':
+ if (type === Interpreter.Completion.RETURN) {
+ state.value = value;
+ return;
+ } else if (type !== Interpreter.Completion.THROW) {
+ throw Error('Unsynatctic break/continue not rejected by Acorn');
+ }
+ }
+ if (type === Interpreter.Completion.BREAK) {
+ if (label ? (state.labels && state.labels.indexOf(label) !== -1) :
+ (state.isLoop || state.isSwitch)) {
+ stack.pop();
+ return;
+ }
+ } else if (type === Interpreter.Completion.CONTINUE) {
+ if (label ? (state.labels && state.labels.indexOf(label) !== -1) :
+ state.isLoop) {
+ return;
+ }
+ }
+ }
+
+ // Unhandled completion. Throw a real error.
+ var realError;
+ if (this.isa(value, this.ERROR)) {
+ var errorTable = {
+ 'EvalError': EvalError,
+ 'RangeError': RangeError,
+ 'ReferenceError': ReferenceError,
+ 'SyntaxError': SyntaxError,
+ 'TypeError': TypeError,
+ 'URIError': URIError
+ };
+ var name = this.getProperty(value, 'name').toString();
+ var message = this.getProperty(value, 'message').valueOf();
+ var type = errorTable[name] || Error;
+ realError = type(message);
+ } else {
+ realError = String(value);
+ }
+ throw realError;
+};
+
+/**
+ * Create a call to a getter function.
+ * @param {!Interpreter.Object} func Function to execute.
+ * @param {!Interpreter.Object|!Array} left
+ * Name of variable or object/propname tuple.
+ * @private
+ */
+Interpreter.prototype.createGetter_ = function(func, left) {
+ // Normally 'this' will be specified as the object component (o.x).
+ // Sometimes 'this' is explicitly provided (o).
+ var funcThis = Array.isArray(left) ? left[0] : left;
+ var node = new this.nodeConstructor();
+ node['type'] = 'CallExpression';
+ var state = new Interpreter.State(node,
+ this.stateStack[this.stateStack.length - 1].scope);
+ state.doneCallee_ = true;
+ state.funcThis_ = funcThis;
+ state.func_ = func;
+ state.doneArgs_ = true;
+ state.arguments_ = [];
+ return state;
+};
+
+/**
+ * Create a call to a setter function.
+ * @param {!Interpreter.Object} func Function to execute.
+ * @param {!Interpreter.Object|!Array} left
+ * Name of variable or object/propname tuple.
+ * @param {Interpreter.Value} value Value to set.
+ * @private
+ */
+Interpreter.prototype.createSetter_ = function(func, left, value) {
+ // Normally 'this' will be specified as the object component (o.x).
+ // Sometimes 'this' is implicitly the global object (x).
+ var funcThis = Array.isArray(left) ? left[0] : this.global;
+ var node = new this.nodeConstructor();
+ node['type'] = 'CallExpression';
+ var state = new Interpreter.State(node,
+ this.stateStack[this.stateStack.length - 1].scope);
+ state.doneCallee_ = true;
+ state.funcThis_ = funcThis;
+ state.func_ = func;
+ state.doneArgs_ = true;
+ state.arguments_ = [value];
+ return state;
+};
+
+/**
+ * Class for a state.
+ * @param {!Object} node AST node for the state.
+ * @param {!Interpreter.Object} scope Scope object for the state.
+ * @constructor
+ */
+Interpreter.State = function(node, scope) {
+ this.node = node;
+ this.scope = scope;
+};
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Functions to handle each node type.
+///////////////////////////////////////////////////////////////////////////////
+
+Interpreter.prototype['stepArrayExpression'] = function(stack, state, node) {
+ var elements = node['elements'];
+ var n = state.n_ || 0;
+ if (!state.array_) {
+ state.array_ = this.createObjectProto(this.ARRAY_PROTO);
+ state.array_.properties.length = elements.length;
+ } else {
+ this.setProperty(state.array_, n, state.value);
+ n++;
+ }
+ while (n < elements.length) {
+ // Skip missing elements - they're not defined, not undefined.
+ if (elements[n]) {
+ state.n_ = n;
+ return new Interpreter.State(elements[n], state.scope);
+ }
+ n++;
+ }
+ stack.pop();
+ stack[stack.length - 1].value = state.array_;
+};
+
+Interpreter.prototype['stepAssignmentExpression'] =
+ function(stack, state, node) {
+ if (!state.doneLeft_) {
+ state.doneLeft_ = true;
+ var nextState = new Interpreter.State(node['left'], state.scope);
+ nextState.components = true;
+ return nextState;
+ }
+ if (!state.doneRight_) {
+ if (!state.leftReference_) {
+ state.leftReference_ = state.value;
+ }
+ if (state.doneGetter_) {
+ state.leftValue_ = state.value;
+ }
+ if (!state.doneGetter_ && node['operator'] !== '=') {
+ var leftValue = this.getValue(state.leftReference_);
+ state.leftValue_ = leftValue;
+ if (leftValue && typeof leftValue === 'object' && leftValue.isGetter) {
+ // Clear the getter flag and call the getter function.
+ leftValue.isGetter = false;
+ state.doneGetter_ = true;
+ var func = /** @type {!Interpreter.Object} */ (leftValue);
+ return this.createGetter_(func, state.leftReference_);
+ }
+ }
+ state.doneRight_ = true;
+ return new Interpreter.State(node['right'], state.scope);
+ }
+ if (state.doneSetter_) {
+ // Return if setter function.
+ // Setter method on property has completed.
+ // Ignore its return value, and use the original set value instead.
+ stack.pop();
+ stack[stack.length - 1].value = state.setterValue_;
+ return;
+ }
+ var value = state.leftValue_;
+ var rightValue = state.value;
+ switch (node['operator']) {
+ case '=': value = rightValue; break;
+ case '+=': value += rightValue; break;
+ case '-=': value -= rightValue; break;
+ case '*=': value *= rightValue; break;
+ case '/=': value /= rightValue; break;
+ case '%=': value %= rightValue; break;
+ case '<<=': value <<= rightValue; break;
+ case '>>=': value >>= rightValue; break;
+ case '>>>=': value >>>= rightValue; break;
+ case '&=': value &= rightValue; break;
+ case '^=': value ^= rightValue; break;
+ case '|=': value |= rightValue; break;
+ default:
+ throw SyntaxError('Unknown assignment expression: ' + node['operator']);
+ }
+ var setter = this.setValue(state.leftReference_, value);
+ if (setter) {
+ state.doneSetter_ = true;
+ state.setterValue_ = value;
+ return this.createSetter_(setter, state.leftReference_, value);
+ }
+ // Return if no setter function.
+ stack.pop();
+ stack[stack.length - 1].value = value;
+};
+
+Interpreter.prototype['stepBinaryExpression'] = function(stack, state, node) {
+ if (!state.doneLeft_) {
+ state.doneLeft_ = true;
+ return new Interpreter.State(node['left'], state.scope);
+ }
+ if (!state.doneRight_) {
+ state.doneRight_ = true;
+ state.leftValue_ = state.value;
+ return new Interpreter.State(node['right'], state.scope);
+ }
+ stack.pop();
+ var leftValue = state.leftValue_;
+ var rightValue = state.value;
+ var value;
+ switch (node['operator']) {
+ case '==': value = leftValue == rightValue; break;
+ case '!=': value = leftValue != rightValue; break;
+ case '===': value = leftValue === rightValue; break;
+ case '!==': value = leftValue !== rightValue; break;
+ case '>': value = leftValue > rightValue; break;
+ case '>=': value = leftValue >= rightValue; break;
+ case '<': value = leftValue < rightValue; break;
+ case '<=': value = leftValue <= rightValue; break;
+ case '+': value = leftValue + rightValue; break;
+ case '-': value = leftValue - rightValue; break;
+ case '*': value = leftValue * rightValue; break;
+ case '/': value = leftValue / rightValue; break;
+ case '%': value = leftValue % rightValue; break;
+ case '&': value = leftValue & rightValue; break;
+ case '|': value = leftValue | rightValue; break;
+ case '^': value = leftValue ^ rightValue; break;
+ case '<<': value = leftValue << rightValue; break;
+ case '>>': value = leftValue >> rightValue; break;
+ case '>>>': value = leftValue >>> rightValue; break;
+ case 'in':
+ if (!rightValue || !rightValue.isObject) {
+ this.throwException(this.TYPE_ERROR,
+ "'in' expects an object, not '" + rightValue + "'");
+ }
+ value = this.hasProperty(rightValue, leftValue);
+ break;
+ case 'instanceof':
+ if (!this.isa(rightValue, this.FUNCTION)) {
+ this.throwException(this.TYPE_ERROR,
+ 'Right-hand side of instanceof is not an object');
+ }
+ value = leftValue.isObject ? this.isa(leftValue, rightValue) : false;
+ break;
+ default:
+ throw SyntaxError('Unknown binary operator: ' + node['operator']);
+ }
+ stack[stack.length - 1].value = value;
+};
+
+Interpreter.prototype['stepBlockStatement'] = function(stack, state, node) {
+ var n = state.n_ || 0;
+ var expression = node['body'][n];
+ if (expression) {
+ state.n_ = n + 1;
+ return new Interpreter.State(expression, state.scope);
+ }
+ stack.pop();
+};
+
+Interpreter.prototype['stepBreakStatement'] = function(stack, state, node) {
+ var label = node['label'] && node['label']['name'];
+ this.unwind(Interpreter.Completion.BREAK, undefined, label);
+};
+
+Interpreter.prototype['stepCallExpression'] = function(stack, state, node) {
+ if (!state.doneCallee_) {
+ state.doneCallee_ = 1;
+ // Components needed to determine value of 'this'.
+ var nextState = new Interpreter.State(node['callee'], state.scope);
+ nextState.components = true;
+ return nextState;
+ }
+ if (state.doneCallee_ === 1) {
+ // Determine value of the function.
+ state.doneCallee_ = 2;
+ var func = state.value;
+ if (Array.isArray(func)) {
+ state.func_ = this.getValue(func);
+ if (func[0] === Interpreter.SCOPE_REFERENCE) {
+ // (Globally or locally) named function. Is it named 'eval'?
+ state.directEval_ = (func[1] === 'eval');
+ } else {
+ // Method function, 'this' is object (ignored if invoked as 'new').
+ state.funcThis_ = func[0];
+ }
+ func = state.func_;
+ if (func && typeof func === 'object' && func.isGetter) {
+ // Clear the getter flag and call the getter function.
+ func.isGetter = false;
+ state.doneCallee_ = 1;
+ return this.createGetter_(/** @type {!Interpreter.Object} */ (func),
+ state.value);
+ }
+ } else {
+ // Already evaluated function: (function(){...})();
+ state.func_ = func;
+ }
+ state.arguments_ = [];
+ state.n_ = 0;
+ }
+ var func = state.func_;
+ if (!state.doneArgs_) {
+ if (state.n_ !== 0) {
+ state.arguments_.push(state.value);
+ }
+ if (node['arguments'][state.n_]) {
+ return new Interpreter.State(node['arguments'][state.n_++], state.scope);
+ }
+ // Determine value of 'this' in function.
+ if (node['type'] === 'NewExpression') {
+ if (func.illegalConstructor) {
+ // Illegal: new escape();
+ this.throwException(this.TYPE_ERROR, func + ' is not a constructor');
+ }
+ // Constructor, 'this' is new object.
+ var proto = func.properties['prototype'];
+ if (typeof proto !== 'object' || proto === null) {
+ // Non-object prototypes default to Object.prototype.
+ proto = this.OBJECT_PROTO;
+ }
+ state.funcThis_ = this.createObjectProto(proto);
+ state.isConstructor = true;
+ } else if (state.funcThis_ === undefined) {
+ // Global function, 'this' is global object (or 'undefined' if strict).
+ state.funcThis_ = state.scope.strict ? undefined : this.global;
+ }
+ state.doneArgs_ = true;
+ }
+ if (!state.doneExec_) {
+ state.doneExec_ = true;
+ if (!func || !func.isObject) {
+ this.throwException(this.TYPE_ERROR, func + ' is not a function');
+ }
+ var funcNode = func.node;
+ if (funcNode) {
+ var scope = this.createScope(funcNode['body'], func.parentScope);
+ // Add all arguments.
+ for (var i = 0; i < funcNode['params'].length; i++) {
+ var paramName = funcNode['params'][i]['name'];
+ var paramValue = state.arguments_.length > i ? state.arguments_[i] :
+ undefined;
+ this.setProperty(scope, paramName, paramValue);
+ }
+ // Build arguments variable.
+ var argsList = this.createObjectProto(this.ARRAY_PROTO);
+ for (var i = 0; i < state.arguments_.length; i++) {
+ this.setProperty(argsList, i, state.arguments_[i]);
+ }
+ this.setProperty(scope, 'arguments', argsList);
+ // Add the function's name (var x = function foo(){};)
+ var name = funcNode['id'] && funcNode['id']['name'];
+ if (name) {
+ this.setProperty(scope, name, func);
+ }
+ this.setProperty(scope, 'this', state.funcThis_,
+ Interpreter.READONLY_DESCRIPTOR);
+ state.value = undefined; // Default value if no explicit return.
+ return new Interpreter.State(funcNode['body'], scope);
+ } else if (func.eval) {
+ var code = state.arguments_[0];
+ if (typeof code !== 'string') {
+ // JS does not parse String objects:
+ // eval(new String('1 + 1')) -> '1 + 1'
+ state.value = code;
+ } else {
+ try {
+ var ast = _utils_acorn__WEBPACK_IMPORTED_MODULE_0__["parse"](code.toString(), Interpreter.PARSE_OPTIONS);
+ } catch (e) {
+ // Acorn threw a SyntaxError. Rethrow as a trappable error.
+ this.throwException(this.SYNTAX_ERROR, 'Invalid code: ' + e.message);
+ }
+ var evalNode = new this.nodeConstructor();
+ evalNode['type'] = 'EvalProgram_';
+ evalNode['body'] = ast['body'];
+ this.stripLocations_(evalNode, node['start'], node['end']);
+ // Create new scope and update it with definitions in eval().
+ var scope = state.directEval_ ? state.scope : this.global;
+ if (scope.strict) {
+ // Strict mode get its own scope in eval.
+ scope = this.createScope(ast, scope);
+ } else {
+ // Non-strict mode pollutes the current scope.
+ this.populateScope_(ast, scope);
+ }
+ this.value = undefined; // Default value if no code.
+ return new Interpreter.State(evalNode, scope);
+ }
+ } else if (func.nativeFunc) {
+ state.value = func.nativeFunc.apply(state.funcThis_, state.arguments_);
+ } else if (func.asyncFunc) {
+ var thisInterpreter = this;
+ var callback = function(value) {
+ state.value = value;
+ thisInterpreter.paused_ = false;
+ };
+ var argsWithCallback = state.arguments_.concat(callback);
+ this.paused_ = true;
+ func.asyncFunc.apply(state.funcThis_, argsWithCallback);
+ return;
+ } else {
+ /* A child of a function is a function but is not callable. For example:
+ var F = function() {};
+ F.prototype = escape;
+ var f = new F();
+ f();
+ */
+ this.throwException(this.TYPE_ERROR, func.class + ' is not a function');
+ }
+ } else {
+ // Execution complete. Put the return value on the stack.
+ stack.pop();
+ if (state.isConstructor && typeof state.value !== 'object') {
+ stack[stack.length - 1].value = state.funcThis_;
+ } else {
+ stack[stack.length - 1].value = state.value;
+ }
+ }
+};
+
+Interpreter.prototype['stepCatchClause'] = function(stack, state, node) {
+ if (!state.done_) {
+ state.done_ = true;
+ // Create an empty scope.
+ var scope = this.createSpecialScope(state.scope);
+ // Add the argument.
+ this.setProperty(scope, node['param']['name'], state.throwValue);
+ // Execute catch clause.
+ return new Interpreter.State(node['body'], scope);
+ } else {
+ stack.pop();
+ }
+};
+
+Interpreter.prototype['stepConditionalExpression'] =
+ function(stack, state, node) {
+ var mode = state.mode_ || 0;
+ if (mode === 0) {
+ state.mode_ = 1;
+ return new Interpreter.State(node['test'], state.scope);
+ }
+ if (mode === 1) {
+ state.mode_ = 2;
+ var value = Boolean(state.value);
+ if (value && node['consequent']) {
+ // Execute 'if' block.
+ return new Interpreter.State(node['consequent'], state.scope);
+ } else if (!value && node['alternate']) {
+ // Execute 'else' block.
+ return new Interpreter.State(node['alternate'], state.scope);
+ }
+ // eval('1;if(false){2}') -> undefined
+ this.value = undefined;
+ }
+ stack.pop();
+ if (node['type'] === 'ConditionalExpression') {
+ stack[stack.length - 1].value = state.value;
+ }
+};
+
+Interpreter.prototype['stepContinueStatement'] = function(stack, state, node) {
+ var label = node['label'] && node['label']['name'];
+ this.unwind(Interpreter.Completion.CONTINUE, undefined, label);
+};
+
+Interpreter.prototype['stepDebuggerStatement'] = function(stack, state, node) {
+ // Do nothing. May be overridden by developers.
+ stack.pop();
+};
+
+Interpreter.prototype['stepDoWhileStatement'] = function(stack, state, node) {
+ if (node['type'] === 'DoWhileStatement' && state.test_ === undefined) {
+ // First iteration of do/while executes without checking test.
+ state.value = true;
+ state.test_ = true;
+ }
+ if (!state.test_) {
+ state.test_ = true;
+ return new Interpreter.State(node['test'], state.scope);
+ }
+ if (!state.value) { // Done, exit loop.
+ stack.pop();
+ } else if (node['body']) { // Execute the body.
+ state.test_ = false;
+ state.isLoop = true;
+ return new Interpreter.State(node['body'], state.scope);
+ }
+};
+
+Interpreter.prototype['stepEmptyStatement'] = function(stack, state, node) {
+ stack.pop();
+};
+
+Interpreter.prototype['stepEvalProgram_'] = function(stack, state, node) {
+ var n = state.n_ || 0;
+ var expression = node['body'][n];
+ if (expression) {
+ state.n_ = n + 1;
+ return new Interpreter.State(expression, state.scope);
+ }
+ stack.pop();
+ stack[stack.length - 1].value = this.value;
+};
+
+Interpreter.prototype['stepExpressionStatement'] = function(stack, state, node) {
+ if (!state.done_) {
+ state.done_ = true;
+ return new Interpreter.State(node['expression'], state.scope);
+ }
+ stack.pop();
+ // Save this value to interpreter.value for use as a return value if
+ // this code is inside an eval function.
+ this.value = state.value;
+};
+
+Interpreter.prototype['stepForInStatement'] = function(stack, state, node) {
+ // First, initialize a variable if exists. Only do so once, ever.
+ if (!state.doneInit_) {
+ state.doneInit_ = true;
+ if (node['left']['declarations'] &&
+ node['left']['declarations'][0]['init']) {
+ if (state.scope.strict) {
+ this.throwException(this.SYNTAX_ERROR,
+ 'for-in loop variable declaration may not have an initializer.');
+ }
+ // Variable initialization: for (var x = 4 in y)
+ return new Interpreter.State(node['left'], state.scope);
+ }
+ }
+ // Second, look up the object. Only do so once, ever.
+ if (!state.doneObject_) {
+ state.doneObject_ = true;
+ if (!state.variable_) {
+ state.variable_ = state.value;
+ }
+ return new Interpreter.State(node['right'], state.scope);
+ }
+ if (!state.isLoop) {
+ // First iteration.
+ state.isLoop = true;
+ state.object_ = state.value;
+ state.visited_ = Object.create(null);
+ }
+ // Third, find the property name for this iteration.
+ if (state.name_ === undefined) {
+ gotPropName: while (true) {
+ if (state.object_ && state.object_.isObject) {
+ if (!state.props_) {
+ state.props_ = Object.getOwnPropertyNames(state.object_.properties);
+ }
+ while (true) {
+ var prop = state.props_.shift();
+ if (prop === undefined) {
+ break; // Reached end of this object's properties.
+ }
+ if (!Object.prototype.hasOwnProperty.call(state.object_.properties,
+ prop)) {
+ continue; // Property has been deleted in the loop.
+ }
+ if (state.visited_[prop]) {
+ continue; // Already seen this property on a child.
+ }
+ state.visited_[prop] = true;
+ if (!Object.prototype.propertyIsEnumerable.call(
+ state.object_.properties, prop)) {
+ continue; // Skip non-enumerable property.
+ }
+ state.name_ = prop;
+ break gotPropName;
+ }
+ } else if (state.object_ !== null && state.object_ !== undefined) {
+ // Primitive value (other than null or undefined).
+ if (!state.props_) {
+ state.props_ = Object.getOwnPropertyNames(state.object_);
+ }
+ while (true) {
+ var prop = state.props_.shift();
+ if (prop === undefined) {
+ break; // Reached end of this value's properties.
+ }
+ state.visited_[prop] = true;
+ if (!Object.prototype.propertyIsEnumerable.call(
+ state.object_, prop)) {
+ continue; // Skip non-enumerable property.
+ }
+ state.name_ = prop;
+ break gotPropName;
+ }
+ }
+ state.object_ = this.getPrototype(state.object_);
+ state.props_ = null;
+ if (state.object_ === null) {
+ // Done, exit loop.
+ stack.pop();
+ return;
+ }
+ }
+ }
+ // Fourth, find the variable
+ if (!state.doneVariable_) {
+ state.doneVariable_ = true;
+ var left = node['left'];
+ if (left['type'] === 'VariableDeclaration') {
+ // Inline variable declaration: for (var x in y)
+ state.variable_ =
+ [Interpreter.SCOPE_REFERENCE, left['declarations'][0]['id']['name']];
+ } else {
+ // Arbitrary left side: for (foo().bar in y)
+ state.variable_ = null;
+ var nextState = new Interpreter.State(left, state.scope);
+ nextState.components = true;
+ return nextState;
+ }
+ }
+ if (!state.variable_) {
+ state.variable_ = state.value;
+ }
+ // Fifth, set the variable.
+ if (!state.doneSetter_) {
+ state.doneSetter_ = true;
+ var value = state.name_;
+ var setter = this.setValue(state.variable_, value);
+ if (setter) {
+ return this.createSetter_(setter, state.variable_, value);
+ }
+ }
+ // Next step will be step three.
+ state.name_ = undefined;
+ // Reevaluate the variable since it could be a setter on the global object.
+ state.doneVariable_ = false;
+ state.doneSetter_ = false;
+ // Sixth and finally, execute the body if there was one. this.
+ if (node['body']) {
+ return new Interpreter.State(node['body'], state.scope);
+ }
+};
+
+Interpreter.prototype['stepForStatement'] = function(stack, state, node) {
+ var mode = state.mode_ || 0;
+ if (mode === 0) {
+ state.mode_ = 1;
+ if (node['init']) {
+ return new Interpreter.State(node['init'], state.scope);
+ }
+ } else if (mode === 1) {
+ state.mode_ = 2;
+ if (node['test']) {
+ return new Interpreter.State(node['test'], state.scope);
+ }
+ } else if (mode === 2) {
+ state.mode_ = 3;
+ if (node['test'] && !state.value) {
+ // Done, exit loop.
+ stack.pop();
+ } else { // Execute the body.
+ state.isLoop = true;
+ return new Interpreter.State(node['body'], state.scope);
+ }
+ } else if (mode === 3) {
+ state.mode_ = 1;
+ if (node['update']) {
+ return new Interpreter.State(node['update'], state.scope);
+ }
+ }
+};
+
+Interpreter.prototype['stepFunctionDeclaration'] =
+ function(stack, state, node) {
+ // This was found and handled when the scope was populated.
+ stack.pop();
+};
+
+Interpreter.prototype['stepFunctionExpression'] = function(stack, state, node) {
+ stack.pop();
+ stack[stack.length - 1].value = this.createFunction(node, state.scope);
+};
+
+Interpreter.prototype['stepIdentifier'] = function(stack, state, node) {
+ stack.pop();
+ if (state.components) {
+ stack[stack.length - 1].value = [Interpreter.SCOPE_REFERENCE, node['name']];
+ return;
+ }
+ var value = this.getValueFromScope(node['name']);
+ // An identifier could be a getter if it's a property on the global object.
+ if (value && typeof value === 'object' && value.isGetter) {
+ // Clear the getter flag and call the getter function.
+ value.isGetter = false;
+ var scope = state.scope;
+ while (!this.hasProperty(scope, node['name'])) {
+ scope = scope.parentScope;
+ }
+ var func = /** @type {!Interpreter.Object} */ (value);
+ return this.createGetter_(func, this.global);
+ }
+ stack[stack.length - 1].value = value;
+};
+
+Interpreter.prototype['stepIfStatement'] =
+ Interpreter.prototype['stepConditionalExpression'];
+
+Interpreter.prototype['stepLabeledStatement'] = function(stack, state, node) {
+ // No need to hit this node again on the way back up the stack.
+ stack.pop();
+ // Note that a statement might have multiple labels.
+ var labels = state.labels || [];
+ labels.push(node['label']['name']);
+ var nextState = new Interpreter.State(node['body'], state.scope);
+ nextState.labels = labels;
+ return nextState;
+};
+
+Interpreter.prototype['stepLiteral'] = function(stack, state, node) {
+ stack.pop();
+ var value = node['value'];
+ if (value instanceof RegExp) {
+ var pseudoRegexp = this.createObjectProto(this.REGEXP_PROTO);
+ this.populateRegExp(pseudoRegexp, value);
+ value = pseudoRegexp;
+ }
+ stack[stack.length - 1].value = value;
+};
+
+Interpreter.prototype['stepLogicalExpression'] = function(stack, state, node) {
+ if (node['operator'] !== '&&' && node['operator'] !== '||') {
+ throw SyntaxError('Unknown logical operator: ' + node['operator']);
+ }
+ if (!state.doneLeft_) {
+ state.doneLeft_ = true;
+ return new Interpreter.State(node['left'], state.scope);
+ }
+ if (!state.doneRight_) {
+ if ((node['operator'] === '&&' && !state.value) ||
+ (node['operator'] === '||' && state.value)) {
+ // Shortcut evaluation.
+ stack.pop();
+ stack[stack.length - 1].value = state.value;
+ } else {
+ state.doneRight_ = true;
+ return new Interpreter.State(node['right'], state.scope);
+ }
+ } else {
+ stack.pop();
+ stack[stack.length - 1].value = state.value;
+ }
+};
+
+Interpreter.prototype['stepMemberExpression'] = function(stack, state, node) {
+ if (!state.doneObject_) {
+ state.doneObject_ = true;
+ return new Interpreter.State(node['object'], state.scope);
+ }
+ var propName;
+ if (!node['computed']) {
+ state.object_ = state.value;
+ // obj.foo -- Just access 'foo' directly.
+ propName = node['property']['name'];
+ } else if (!state.doneProperty_) {
+ state.object_ = state.value;
+ // obj[foo] -- Compute value of 'foo'.
+ state.doneProperty_ = true;
+ return new Interpreter.State(node['property'], state.scope);
+ } else {
+ propName = state.value;
+ }
+ stack.pop();
+ if (state.components) {
+ stack[stack.length - 1].value = [state.object_, propName];
+ } else {
+ var value = this.getProperty(state.object_, propName);
+ if (value && typeof value === 'object' && value.isGetter) {
+ // Clear the getter flag and call the getter function.
+ value.isGetter = false;
+ var func = /** @type {!Interpreter.Object} */ (value);
+ return this.createGetter_(func, state.object_);
+ }
+ stack[stack.length - 1].value = value;
+ }
+};
+
+Interpreter.prototype['stepNewExpression'] =
+ Interpreter.prototype['stepCallExpression'];
+
+Interpreter.prototype['stepObjectExpression'] = function(stack, state, node) {
+ var n = state.n_ || 0;
+ var property = node['properties'][n];
+ if (!state.object_) {
+ // First execution.
+ state.object_ = this.createObjectProto(this.OBJECT_PROTO);
+ state.properties_ = Object.create(null);
+ } else {
+ // Determine property name.
+ var key = property['key'];
+ if (key['type'] === 'Identifier') {
+ var propName = key['name'];
+ } else if (key['type'] === 'Literal') {
+ var propName = key['value'];
+ } else {
+ throw SyntaxError('Unknown object structure: ' + key['type']);
+ }
+ // Set the property computed in the previous execution.
+ if (!state.properties_[propName]) {
+ // Create temp object to collect value, getter, and/or setter.
+ state.properties_[propName] = {};
+ }
+ state.properties_[propName][property['kind']] = state.value;
+ state.n_ = ++n;
+ property = node['properties'][n];
+ }
+ if (property) {
+ return new Interpreter.State(property['value'], state.scope);
+ }
+ for (var key in state.properties_) {
+ var kinds = state.properties_[key];
+ if ('get' in kinds || 'set' in kinds) {
+ // Set a property with a getter or setter.
+ var descriptor = {
+ configurable: true,
+ enumerable: true,
+ get: kinds['get'],
+ set: kinds['set']
+ };
+ this.setProperty(state.object_, key, null, descriptor);
+ } else {
+ // Set a normal property with a value.
+ this.setProperty(state.object_, key, kinds['init']);
+ }
+ }
+ stack.pop();
+ stack[stack.length - 1].value = state.object_;
+};
+
+Interpreter.prototype['stepProgram'] = function(stack, state, node) {
+ var expression = node['body'].shift();
+ if (expression) {
+ state.done = false;
+ return new Interpreter.State(expression, state.scope);
+ }
+ state.done = true;
+ // Don't pop the stateStack.
+ // Leave the root scope on the tree in case the program is appended to.
+};
+
+Interpreter.prototype['stepReturnStatement'] = function(stack, state, node) {
+ if (node['argument'] && !state.done_) {
+ state.done_ = true;
+ return new Interpreter.State(node['argument'], state.scope);
+ }
+ this.unwind(Interpreter.Completion.RETURN, state.value, undefined);
+};
+
+Interpreter.prototype['stepSequenceExpression'] = function(stack, state, node) {
+ var n = state.n_ || 0;
+ var expression = node['expressions'][n];
+ if (expression) {
+ state.n_ = n + 1;
+ return new Interpreter.State(expression, state.scope);
+ }
+ stack.pop();
+ stack[stack.length - 1].value = state.value;
+};
+
+Interpreter.prototype['stepSwitchStatement'] = function(stack, state, node) {
+ if (!state.test_) {
+ state.test_ = 1;
+ return new Interpreter.State(node['discriminant'], state.scope);
+ }
+ if (state.test_ === 1) {
+ state.test_ = 2;
+ // Preserve switch value between case tests.
+ state.switchValue_ = state.value;
+ state.defaultCase_ = -1;
+ }
+
+ while (true) {
+ var index = state.index_ || 0;
+ var switchCase = node['cases'][index];
+ if (!state.matched_ && switchCase && !switchCase['test']) {
+ // Test on the default case is null.
+ // Bypass (but store) the default case, and get back to it later.
+ state.defaultCase_ = index;
+ state.index_ = index + 1;
+ continue;
+ }
+ if (!switchCase && !state.matched_ && state.defaultCase_ !== -1) {
+ // Ran through all cases, no match. Jump to the default.
+ state.matched_ = true;
+ state.index_ = state.defaultCase_;
+ continue;
+ }
+ if (switchCase) {
+ if (!state.matched_ && !state.tested_ && switchCase['test']) {
+ state.tested_ = true;
+ return new Interpreter.State(switchCase['test'], state.scope);
+ }
+ if (state.matched_ || state.value === state.switchValue_) {
+ state.matched_ = true;
+ var n = state.n_ || 0;
+ if (switchCase['consequent'][n]) {
+ state.isSwitch = true;
+ state.n_ = n + 1;
+ return new Interpreter.State(switchCase['consequent'][n],
+ state.scope);
+ }
+ }
+ // Move on to next case.
+ state.tested_ = false;
+ state.n_ = 0;
+ state.index_ = index + 1;
+ } else {
+ stack.pop();
+ return;
+ }
+ }
+};
+
+Interpreter.prototype['stepThisExpression'] = function(stack, state, node) {
+ stack.pop();
+ stack[stack.length - 1].value = this.getValueFromScope('this');
+};
+
+Interpreter.prototype['stepThrowStatement'] = function(stack, state, node) {
+ if (!state.done_) {
+ state.done_ = true;
+ return new Interpreter.State(node['argument'], state.scope);
+ } else {
+ this.throwException(state.value);
+ }
+};
+
+Interpreter.prototype['stepTryStatement'] = function(stack, state, node) {
+ if (!state.doneBlock_) {
+ state.doneBlock_ = true;
+ return new Interpreter.State(node['block'], state.scope);
+ }
+ if (state.cv && state.cv.type === Interpreter.Completion.THROW &&
+ !state.doneHandler_ && node['handler']) {
+ state.doneHandler_ = true;
+ var nextState = new Interpreter.State(node['handler'], state.scope);
+ nextState.throwValue = state.cv.value;
+ state.cv = undefined; // This error has been handled, don't rethrow.
+ return nextState;
+ }
+ if (!state.doneFinalizer_ && node['finalizer']) {
+ state.doneFinalizer_ = true;
+ return new Interpreter.State(node['finalizer'], state.scope);
+ }
+ stack.pop();
+ if (state.cv) {
+ // There was no catch handler, or the catch/finally threw an error.
+ // Throw the error up to a higher try.
+ this.unwind(state.cv.type, state.cv.value, state.cv.label);
+ }
+};
+
+Interpreter.prototype['stepUnaryExpression'] = function(stack, state, node) {
+ if (!state.done_) {
+ state.done_ = true;
+ var nextState = new Interpreter.State(node['argument'], state.scope);
+ nextState.components = node['operator'] === 'delete';
+ return nextState;
+ }
+ stack.pop();
+ var value = state.value;
+ if (node['operator'] === '-') {
+ value = -value;
+ } else if (node['operator'] === '+') {
+ value = +value;
+ } else if (node['operator'] === '!') {
+ value = !value;
+ } else if (node['operator'] === '~') {
+ value = ~value;
+ } else if (node['operator'] === 'delete') {
+ var result = true;
+ // If value is not an array, then it is a primitive, or some other value.
+ // If so, skip the delete and return true.
+ if (Array.isArray(value)) {
+ var obj = value[0];
+ if (obj === Interpreter.SCOPE_REFERENCE) {
+ // 'delete foo;' is the same as 'delete window.foo'.
+ obj = state.scope;
+ }
+ var name = String(value[1]);
+ try {
+ delete obj.properties[name];
+ } catch (e) {
+ if (state.scope.strict) {
+ this.throwException(this.TYPE_ERROR, "Cannot delete property '" +
+ name + "' of '" + obj + "'");
+ } else {
+ result = false;
+ }
+ }
+ }
+ value = result;
+ } else if (node['operator'] === 'typeof') {
+ value = (value && value.class === 'Function') ? 'function' : typeof value;
+ } else if (node['operator'] === 'void') {
+ value = undefined;
+ } else {
+ throw SyntaxError('Unknown unary operator: ' + node['operator']);
+ }
+ stack[stack.length - 1].value = value;
+};
+
+Interpreter.prototype['stepUpdateExpression'] = function(stack, state, node) {
+ if (!state.doneLeft_) {
+ state.doneLeft_ = true;
+ var nextState = new Interpreter.State(node['argument'], state.scope);
+ nextState.components = true;
+ return nextState;
+ }
+ if (!state.leftSide_) {
+ state.leftSide_ = state.value;
+ }
+ if (state.doneGetter_) {
+ state.leftValue_ = state.value;
+ }
+ if (!state.doneGetter_) {
+ var leftValue = this.getValue(state.leftSide_);
+ state.leftValue_ = leftValue;
+ if (leftValue && typeof leftValue === 'object' && leftValue.isGetter) {
+ // Clear the getter flag and call the getter function.
+ leftValue.isGetter = false;
+ state.doneGetter_ = true;
+ var func = /** @type {!Interpreter.Object} */ (leftValue);
+ return this.createGetter_(func, state.leftSide_);
+ }
+ }
+ if (state.doneSetter_) {
+ // Return if setter function.
+ // Setter method on property has completed.
+ // Ignore its return value, and use the original set value instead.
+ stack.pop();
+ stack[stack.length - 1].value = state.setterValue_;
+ return;
+ }
+ var leftValue = Number(state.leftValue_);
+ var changeValue;
+ if (node['operator'] === '++') {
+ changeValue = leftValue + 1;
+ } else if (node['operator'] === '--') {
+ changeValue = leftValue - 1;
+ } else {
+ throw SyntaxError('Unknown update expression: ' + node['operator']);
+ }
+ var returnValue = node['prefix'] ? changeValue : leftValue;
+ var setter = this.setValue(state.leftSide_, changeValue);
+ if (setter) {
+ state.doneSetter_ = true;
+ state.setterValue_ = returnValue;
+ return this.createSetter_(setter, state.leftSide_, changeValue);
+ }
+ // Return if no setter function.
+ stack.pop();
+ stack[stack.length - 1].value = returnValue;
+};
+
+Interpreter.prototype['stepVariableDeclaration'] = function(stack, state, node) {
+ var declarations = node['declarations'];
+ var n = state.n_ || 0;
+ var declarationNode = declarations[n];
+ if (state.init_ && declarationNode) {
+ // This setValue call never needs to deal with calling a setter function.
+ // Note that this is setting the init value, not defining the variable.
+ // Variable definition is done when scope is populated.
+ this.setValueToScope(declarationNode['id']['name'], state.value);
+ state.init_ = false;
+ declarationNode = declarations[++n];
+ }
+ while (declarationNode) {
+ // Skip any declarations that are not initialized. They have already
+ // been defined as undefined in populateScope_.
+ if (declarationNode['init']) {
+ state.n_ = n;
+ state.init_ = true;
+ return new Interpreter.State(declarationNode['init'], state.scope);
+ }
+ declarationNode = declarations[++n];
+ }
+ stack.pop();
+};
+
+Interpreter.prototype['stepWithStatement'] = function(stack, state, node) {
+ if (!state.doneObject_) {
+ state.doneObject_ = true;
+ return new Interpreter.State(node['object'], state.scope);
+ } else if (!state.doneBody_) {
+ state.doneBody_ = true;
+ var scope = this.createSpecialScope(state.scope, state.value);
+ return new Interpreter.State(node['body'], scope);
+ } else {
+ stack.pop();
+ }
+};
+
+Interpreter.prototype['stepWhileStatement'] =
+ Interpreter.prototype['stepDoWhileStatement'];
+
+// Preserve top-level API functions from being pruned/renamed by JS compilers.
+// Add others as needed.
+// The global object ('window' in a browser, 'global' in node.js) is 'this'.
+//this['Interpreter'] = Interpreter;
+Interpreter.prototype['step'] = Interpreter.prototype.step;
+Interpreter.prototype['run'] = Interpreter.prototype.run;
+Interpreter.prototype['appendCode'] = Interpreter.prototype.appendCode;
+Interpreter.prototype['createObject'] = Interpreter.prototype.createObject;
+Interpreter.prototype['createObjectProto'] =
+ Interpreter.prototype.createObjectProto;
+Interpreter.prototype['createAsyncFunction'] =
+ Interpreter.prototype.createAsyncFunction;
+Interpreter.prototype['createNativeFunction'] =
+ Interpreter.prototype.createNativeFunction;
+Interpreter.prototype['getProperty'] = Interpreter.prototype.getProperty;
+Interpreter.prototype['setProperty'] = Interpreter.prototype.setProperty;
+Interpreter.prototype['nativeToPseudo'] = Interpreter.prototype.nativeToPseudo;
+Interpreter.prototype['pseudoToNative'] = Interpreter.prototype.pseudoToNative;
+// Obsolete. Do not use.
+Interpreter.prototype['createPrimitive'] = function(x) {return x;};
+
-// Acorn: Copyright 2012 Marijn Haverbeke, MIT License
-const acorn = __webpack_require__(/*! acorn */ 130);
-var mod$$inline_58=function(a){function b(a){n=a||{};for(var b in Ua)Object.prototype.hasOwnProperty.call(n,b)||(n[b]=Ua[b]);wa=n.sourceFile||null}function c(a,b){var c=Ab(k,a);b+=" ("+c.line+":"+c.column+")";var d=new SyntaxError(b);d.pos=a;d.loc=c;d.raisedAt=f;throw d;}function d(a){function b(a){if(1==a.length)return c+="return str === "+JSON.stringify(a[0])+";";c+="switch(str){";for(var va=0;vaa)++f;else if(47===a)if(a=k.charCodeAt(f+1),42===a){var a=n.onComment&&n.locations&&new e,b=f,d=k.indexOf("*/",f+=2);-1===d&&c(f-2,"Unterminated comment");
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- true?mod$$inline_58(exports):undefined;
-// JS-Interpreter: Copyright 2013 Google Inc, Apache 2.0
-function m(a,b){"string"===typeof a&&(a=acorn.parse(a,ja));this.ga=a;this.gb=b;this.xa=!1;this.ca=[];this.Ca=0;this.lb=Object.create(null);var c=/^step([A-Z]\w*)$/,d,e;for(e in this)"function"===typeof this[e]&&(d=e.match(c))&&(this.lb[d[1]]=this[e].bind(this));this.global=ka(this,this.ga,null);this.ga=acorn.parse(this.ca.join("\n"),ja);this.ca=void 0;ra(this,this.ga,void 0,void 0);c=new r(this.ga,this.global);c.done=!1;this.j=[c];this.jb();this.value=void 0;this.ga=a;c=new r(this.ga,this.global);
-c.done=!1;this.j.length=0;this.j[0]=c;this.Pa=c.node.constructor;this.stateStack=this.j}var ja={Ba:5},t={configurable:!0,enumerable:!0,writable:!1},v={configurable:!0,enumerable:!1,writable:!0},B={configurable:!0,enumerable:!1,writable:!1},ya={configurable:!1,enumerable:!0,writable:!0},za={},Aa={},Ba={},Ca=[];
-m.prototype.qb=function(a){var b=this.j[0];if(!b||"Program"!==b.node.type)throw Error("Expecting original AST to start with a Program node.");"string"===typeof a&&(a=acorn.parse(a,ja));if(!a||"Program"!==a.type)throw Error("Expecting new AST to start with a Program node.");Qa(this,a,b.scope);for(var c=0,d;d=a.body[c];c++)b.node.body.push(d);b.done=!1};
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-!1));a.setProperty(b,"parseFloat",a.b(parseFloat,!1));a.setProperty(b,"isNaN",a.b(isNaN,!1));a.setProperty(b,"isFinite",a.b(isFinite,!1));c=[[escape,"escape"],[unescape,"unescape"],[decodeURI,"decodeURI"],[decodeURIComponent,"decodeURIComponent"],[encodeURI,"encodeURI"],[encodeURIComponent,"encodeURIComponent"]];for(var d=0;d>> 0;","if (arguments.length > 1) T = thisArg;","k = 0;","while (k < len) {","if (k in O && !callbackfn.call(T, O[k], k, O)) return false;","k++;","}","return true;",
-"}","});","Object.defineProperty(Array.prototype, 'filter',","{configurable: true, writable: true, value:","function(fun/*, thisArg*/) {","if (this === void 0 || this === null || typeof fun !== 'function') throw TypeError();","var t = Object(this);","var len = t.length >>> 0;","var res = [];","var thisArg = arguments.length >= 2 ? arguments[1] : void 0;","for (var i = 0; i < len; i++) {","if (i in t) {","var val = t[i];","if (fun.call(thisArg, val, i, t)) res.push(val);","}","}","return res;","}",
-"});","Object.defineProperty(Array.prototype, 'forEach',","{configurable: true, writable: true, value:","function(callback, thisArg) {","if (!this || typeof callback !== 'function') throw TypeError();","var T, k;","var O = Object(this);","var len = O.length >>> 0;","if (arguments.length > 1) T = thisArg;","k = 0;","while (k < len) {","if (k in O) callback.call(T, O[k], k, O);","k++;","}","}","});","Object.defineProperty(Array.prototype, 'map',","{configurable: true, writable: true, value:","function(callback, thisArg) {",
-"if (!this || typeof callback !== 'function') new TypeError;","var T, A, k;","var O = Object(this);","var len = O.length >>> 0;","if (arguments.length > 1) T = thisArg;","A = new Array(len);","k = 0;","while (k < len) {","if (k in O) A[k] = callback.call(T, O[k], k, O);","k++;","}","return A;","}","});","Object.defineProperty(Array.prototype, 'reduce',","{configurable: true, writable: true, value:","function(callback /*, initialValue*/) {","if (!this || typeof callback !== 'function') throw TypeError();",
-"var t = Object(this), len = t.length >>> 0, k = 0, value;","if (arguments.length === 2) {","value = arguments[1];","} else {","while (k < len && !(k in t)) k++;","if (k >= len) {","throw TypeError('Reduce of empty array with no initial value');","}","value = t[k++];","}","for (; k < len; k++) {","if (k in t) value = callback(value, t[k], k, t);","}","return value;","}","});","Object.defineProperty(Array.prototype, 'reduceRight',","{configurable: true, writable: true, value:","function(callback /*, initialValue*/) {",
-"if (null === this || 'undefined' === typeof this || 'function' !== typeof callback) throw TypeError();","var t = Object(this), len = t.length >>> 0, k = len - 1, value;","if (arguments.length >= 2) {","value = arguments[1];","} else {","while (k >= 0 && !(k in t)) k--;","if (k < 0) {","throw TypeError('Reduce of empty array with no initial value');","}","value = t[k--];","}","for (; k >= 0; k--) {","if (k in t) value = callback(value, t[k], k, t);","}","return value;","}","});","Object.defineProperty(Array.prototype, 'some',",
-"{configurable: true, writable: true, value:","function(fun/*, thisArg*/) {","if (!this || typeof fun !== 'function') throw TypeError();","var t = Object(this);","var len = t.length >>> 0;","var thisArg = arguments.length >= 2 ? arguments[1] : void 0;","for (var i = 0; i < len; i++) {","if (i in t && fun.call(thisArg, t[i], i, t)) {","return true;","}","}","return false;","}","});","(function() {","var sort_ = Array.prototype.sort;","Array.prototype.sort = function(opt_comp) {","if (typeof opt_comp !== 'function') {",
-"return sort_.call(this);","}","for (var i = 0; i < this.length; i++) {","var changes = 0;","for (var j = 0; j < this.length - i - 1; j++) {","if (opt_comp(this[j], this[j + 1]) > 0) {","var swap = this[j];","this[j] = this[j + 1];","this[j + 1] = swap;","changes++;","}","}","if (!changes) break;","}","return this;","};","})();","Object.defineProperty(Array.prototype, 'toLocaleString',","{configurable: true, writable: true, value:","function() {","var out = [];","for (var i = 0; i < this.length; i++) {",
-"out[i] = (this[i] === null || this[i] === undefined) ? '' : this[i].toLocaleString();","}","return out.join(',');","}","});","")}
-function ub(a,b){var c=function(b){b=String(b);return R(a)?(this.data=b,this):b};a.A=a.b(c,!0);a.setProperty(b,"String",a.A);a.setProperty(a.A,"fromCharCode",a.b(String.fromCharCode,!1),v);c="charAt charCodeAt concat indexOf lastIndexOf slice substr substring toLocaleLowerCase toLocaleUpperCase toLowerCase toUpperCase trim".split(" ");for(var d=0;d= 0; i--) {","str = str.substring(0, subs[i][0]) + subs[i][2] + str.substring(subs[i][0] + subs[i][1]);",
-"}","} else {","var i = str.indexOf(substr);","if (i !== -1) {","var inject = newSubstr(str.substr(i, substr.length), i, str);","str = str.substring(0, i) + inject + str.substring(i + substr.length);","}","}","return str;","};","})();","")}function vb(a,b){a.Ua=a.b(function(b){b=!!b;return R(a)?(this.data=b,this):b},!0);a.setProperty(b,"Boolean",a.Ua)}
-function wb(a,b){var c=function(b){b=Number(b);return R(a)?(this.data=b,this):b};a.T=a.b(c,!0);a.setProperty(b,"Number",a.T);c=["MAX_VALUE","MIN_VALUE","NaN","NEGATIVE_INFINITY","POSITIVE_INFINITY"];for(var d=0;d>>0;return b===Number(a)?b:NaN}function Ec(a){var b=a>>>0;return String(b)===String(a)&&4294967295!==b?b:NaN}function qb(a){this.O=Object.create(null);this.R=Object.create(null);this.a=Object.create(null);this.na=a}h=qb.prototype;h.na=null;h.o=!0;h.K="Object";h.data=null;
-h.toString=function(){if("Array"===this.K){var a=Ca;a.push(this);try{for(var b=[],c=0;cb.charCodeAt(0)&&Y(this,a,this.A)){var c=Ec(b);if(!isNaN(c)&&c>=":d>>=e;break;case ">>>=":d>>>=e;break;case "&=":d&=e;break;case "^=":d^=e;break;case "|=":d|=e;break;default:throw SyntaxError("Unknown assignment expression: "+c.operator);}if(c=Kc(this,b.ta,d))return b.ja=!0,b.Sa=d,Nc(this,c,b.ta,d);a.pop();a[a.length-1].value=d}};
-m.prototype.stepBinaryExpression=function(a,b,c){if(!b.X)return b.X=!0,new r(c.left,b.scope);if(!b.ra)return b.ra=!0,b.Z=b.value,new r(c.right,b.scope);a.pop();var d=b.Z;b=b.value;switch(c.operator){case "==":c=d==b;break;case "!=":c=d!=b;break;case "===":c=d===b;break;case "!==":c=d!==b;break;case ">":c=d>b;break;case ">=":c=d>=b;break;case "<":c=d>":c=d>>b;break;case ">>>":c=d>>>b;break;case "in":b&&b.o||E(this,this.h,"'in' expects an object, not '"+b+"'");c=Cc(this,b,d);break;case "instanceof":Y(this,b,this.C)||E(this,this.h,"Right-hand side of instanceof is not an object");c=d.o?Y(this,d,b):!1;break;default:throw SyntaxError("Unknown binary operator: "+c.operator);}a[a.length-1].value=c};
-m.prototype.stepBlockStatement=function(a,b,c){var d=b.s||0;if(c=c.body[d])return b.s=d+1,new r(c,b.scope);a.pop()};m.prototype.stepBreakStatement=function(a,b,c){Lc(this,1,void 0,c.label&&c.label.name)};
-m.prototype.stepCallExpression=function(a,b,c){if(!b.ia){b.ia=1;var d=new r(c.callee,b.scope);d.ha=!0;return d}if(1===b.ia){b.ia=2;d=b.value;if(Array.isArray(d)){if(b.Y=Jc(this,d),d[0]===Aa?b.ub="eval"===d[1]:b.J=d[0],(d=b.Y)&&"object"===typeof d&&d.L)return d.L=!1,b.ia=1,Mc(this,d,b.value)}else b.Y=d;b.B=[];b.s=0}d=b.Y;if(!b.Ma){0!==b.s&&b.B.push(b.value);if(c.arguments[b.s])return new r(c.arguments[b.s++],b.scope);if("NewExpression"===c.type){d.Db&&E(this,this.h,d+" is not a constructor");var e=
-d.a.prototype;if("object"!==typeof e||null===e)e=this.F;b.J=this.g(e);b.isConstructor=!0}else void 0===b.J&&(b.J=b.scope.G?void 0:this.global);b.Ma=!0}if(b.Na)a.pop(),a[a.length-1].value=b.isConstructor&&"object"!==typeof b.value?b.J:b.value;else{b.Na=!0;d&&d.o||E(this,this.h,d+" is not a function");if(a=d.node){c=ka(this,a.body,d.ba);for(var f=0;ff?b.B[f]:void 0);e=this.g(this.W);for(f=0;f0xffff code points that are a valid part of identifiers. The
-// offset starts at 0x10000, and each pair of numbers represents an
-// offset to the next range, and then a size of the range. They were
-// generated by bin/generate-identifier-regex.js
-
-// eslint-disable-next-line comma-spacing
-var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,17,26,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,26,45,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,785,52,76,44,33,24,27,35,42,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,25,391,63,32,0,449,56,264,8,2,36,18,0,50,29,881,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,881,68,12,0,67,12,65,0,32,6124,20,754,9486,1,3071,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,10591,541];
-
-// eslint-disable-next-line comma-spacing
-var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,1306,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,52,0,13,2,49,13,10,2,4,9,83,11,7,0,161,11,6,9,7,3,57,0,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,87,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,423,9,838,7,2,7,17,9,57,21,2,13,19882,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239];
-
-// This has a complexity linear to the value of the code. The
-// assumption is that looking up astral identifier characters is
-// rare.
-function isInAstralSet(code, set) {
- var pos = 0x10000;
- for (var i = 0; i < set.length; i += 2) {
- pos += set[i];
- if (pos > code) { return false }
- pos += set[i + 1];
- if (pos >= code) { return true }
- }
-}
-
-// Test whether a given character code starts an identifier.
-
-function isIdentifierStart(code, astral) {
- if (code < 65) { return code === 36 }
- if (code < 91) { return true }
- if (code < 97) { return code === 95 }
- if (code < 123) { return true }
- if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code)) }
- if (astral === false) { return false }
- return isInAstralSet(code, astralIdentifierStartCodes)
-}
-
-// Test whether a given character is part of an identifier.
-
-function isIdentifierChar(code, astral) {
- if (code < 48) { return code === 36 }
- if (code < 58) { return true }
- if (code < 65) { return false }
- if (code < 91) { return true }
- if (code < 97) { return code === 95 }
- if (code < 123) { return true }
- if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code)) }
- if (astral === false) { return false }
- return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)
-}
-
-// ## Token types
-
-// The assignment of fine-grained, information-carrying type objects
-// allows the tokenizer to store the information it has about a
-// token in a way that is very cheap for the parser to look up.
-
-// All token type variables start with an underscore, to make them
-// easy to recognize.
-
-// The `beforeExpr` property is used to disambiguate between regular
-// expressions and divisions. It is set on all token types that can
-// be followed by an expression (thus, a slash after them would be a
-// regular expression).
-//
-// The `startsExpr` property is used to check if the token ends a
-// `yield` expression. It is set on all token types that either can
-// directly start an expression (like a quotation mark) or can
-// continue an expression (like the body of a string).
-//
-// `isLoop` marks a keyword as starting a loop, which is important
-// to know when parsing a label, in order to allow or disallow
-// continue jumps to that label.
-
-var TokenType = function TokenType(label, conf) {
- if ( conf === void 0 ) conf = {};
-
- this.label = label;
- this.keyword = conf.keyword;
- this.beforeExpr = !!conf.beforeExpr;
- this.startsExpr = !!conf.startsExpr;
- this.isLoop = !!conf.isLoop;
- this.isAssign = !!conf.isAssign;
- this.prefix = !!conf.prefix;
- this.postfix = !!conf.postfix;
- this.binop = conf.binop || null;
- this.updateContext = null;
-};
-
-function binop(name, prec) {
- return new TokenType(name, {beforeExpr: true, binop: prec})
-}
-var beforeExpr = {beforeExpr: true};
-var startsExpr = {startsExpr: true};
-
-// Map keyword names to token types.
-
-var keywords$1 = {};
-
-// Succinct definitions of keyword token types
-function kw(name, options) {
- if ( options === void 0 ) options = {};
-
- options.keyword = name;
- return keywords$1[name] = new TokenType(name, options)
-}
-
-var types = {
- num: new TokenType("num", startsExpr),
- regexp: new TokenType("regexp", startsExpr),
- string: new TokenType("string", startsExpr),
- name: new TokenType("name", startsExpr),
- eof: new TokenType("eof"),
-
- // Punctuation token types.
- bracketL: new TokenType("[", {beforeExpr: true, startsExpr: true}),
- bracketR: new TokenType("]"),
- braceL: new TokenType("{", {beforeExpr: true, startsExpr: true}),
- braceR: new TokenType("}"),
- parenL: new TokenType("(", {beforeExpr: true, startsExpr: true}),
- parenR: new TokenType(")"),
- comma: new TokenType(",", beforeExpr),
- semi: new TokenType(";", beforeExpr),
- colon: new TokenType(":", beforeExpr),
- dot: new TokenType("."),
- question: new TokenType("?", beforeExpr),
- arrow: new TokenType("=>", beforeExpr),
- template: new TokenType("template"),
- invalidTemplate: new TokenType("invalidTemplate"),
- ellipsis: new TokenType("...", beforeExpr),
- backQuote: new TokenType("`", startsExpr),
- dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}),
-
- // Operators. These carry several kinds of properties to help the
- // parser use them properly (the presence of these properties is
- // what categorizes them as operators).
- //
- // `binop`, when present, specifies that this operator is a binary
- // operator, and will refer to its precedence.
- //
- // `prefix` and `postfix` mark the operator as a prefix or postfix
- // unary operator.
- //
- // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as
- // binary operators with a very low precedence, that should result
- // in AssignmentExpression nodes.
-
- eq: new TokenType("=", {beforeExpr: true, isAssign: true}),
- assign: new TokenType("_=", {beforeExpr: true, isAssign: true}),
- incDec: new TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}),
- prefix: new TokenType("!/~", {beforeExpr: true, prefix: true, startsExpr: true}),
- logicalOR: binop("||", 1),
- logicalAND: binop("&&", 2),
- bitwiseOR: binop("|", 3),
- bitwiseXOR: binop("^", 4),
- bitwiseAND: binop("&", 5),
- equality: binop("==/!=/===/!==", 6),
- relational: binop("/<=/>=", 7),
- bitShift: binop("<>/>>>", 8),
- plusMin: new TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}),
- modulo: binop("%", 10),
- star: binop("*", 10),
- slash: binop("/", 10),
- starstar: new TokenType("**", {beforeExpr: true}),
-
- // Keyword token types.
- _break: kw("break"),
- _case: kw("case", beforeExpr),
- _catch: kw("catch"),
- _continue: kw("continue"),
- _debugger: kw("debugger"),
- _default: kw("default", beforeExpr),
- _do: kw("do", {isLoop: true, beforeExpr: true}),
- _else: kw("else", beforeExpr),
- _finally: kw("finally"),
- _for: kw("for", {isLoop: true}),
- _function: kw("function", startsExpr),
- _if: kw("if"),
- _return: kw("return", beforeExpr),
- _switch: kw("switch"),
- _throw: kw("throw", beforeExpr),
- _try: kw("try"),
- _var: kw("var"),
- _const: kw("const"),
- _while: kw("while", {isLoop: true}),
- _with: kw("with"),
- _new: kw("new", {beforeExpr: true, startsExpr: true}),
- _this: kw("this", startsExpr),
- _super: kw("super", startsExpr),
- _class: kw("class", startsExpr),
- _extends: kw("extends", beforeExpr),
- _export: kw("export"),
- _import: kw("import"),
- _null: kw("null", startsExpr),
- _true: kw("true", startsExpr),
- _false: kw("false", startsExpr),
- _in: kw("in", {beforeExpr: true, binop: 7}),
- _instanceof: kw("instanceof", {beforeExpr: true, binop: 7}),
- _typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}),
- _void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}),
- _delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true})
-};
-
-// Matches a whole line break (where CRLF is considered a single
-// line break). Used to count lines.
-
-var lineBreak = /\r\n?|\n|\u2028|\u2029/;
-var lineBreakG = new RegExp(lineBreak.source, "g");
-
-function isNewLine(code) {
- return code === 10 || code === 13 || code === 0x2028 || code === 0x2029
-}
-
-var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/;
-
-var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
-
-var ref = Object.prototype;
-var hasOwnProperty = ref.hasOwnProperty;
-var toString = ref.toString;
-
-// Checks if an object has a property.
-
-function has(obj, propName) {
- return hasOwnProperty.call(obj, propName)
-}
-
-var isArray = Array.isArray || (function (obj) { return (
- toString.call(obj) === "[object Array]"
-); });
-
-// These are used when `options.locations` is on, for the
-// `startLoc` and `endLoc` properties.
-
-var Position = function Position(line, col) {
- this.line = line;
- this.column = col;
-};
-
-Position.prototype.offset = function offset (n) {
- return new Position(this.line, this.column + n)
-};
-
-var SourceLocation = function SourceLocation(p, start, end) {
- this.start = start;
- this.end = end;
- if (p.sourceFile !== null) { this.source = p.sourceFile; }
-};
-
-// The `getLineInfo` function is mostly useful when the
-// `locations` option is off (for performance reasons) and you
-// want to find the line/column position for a given character
-// offset. `input` should be the code string that the offset refers
-// into.
-
-function getLineInfo(input, offset) {
- for (var line = 1, cur = 0;;) {
- lineBreakG.lastIndex = cur;
- var match = lineBreakG.exec(input);
- if (match && match.index < offset) {
- ++line;
- cur = match.index + match[0].length;
- } else {
- return new Position(line, offset - cur)
- }
- }
-}
-
-// A second optional argument can be given to further configure
-// the parser process. These options are recognized:
-
-var defaultOptions = {
- // `ecmaVersion` indicates the ECMAScript version to parse. Must
- // be either 3, 5, 6 (2015), 7 (2016), or 8 (2017). This influences support
- // for strict mode, the set of reserved words, and support for
- // new syntax features. The default is 7.
- ecmaVersion: 7,
- // `sourceType` indicates the mode the code should be parsed in.
- // Can be either `"script"` or `"module"`. This influences global
- // strict mode and parsing of `import` and `export` declarations.
- sourceType: "script",
- // `onInsertedSemicolon` can be a callback that will be called
- // when a semicolon is automatically inserted. It will be passed
- // th position of the comma as an offset, and if `locations` is
- // enabled, it is given the location as a `{line, column}` object
- // as second argument.
- onInsertedSemicolon: null,
- // `onTrailingComma` is similar to `onInsertedSemicolon`, but for
- // trailing commas.
- onTrailingComma: null,
- // By default, reserved words are only enforced if ecmaVersion >= 5.
- // Set `allowReserved` to a boolean value to explicitly turn this on
- // an off. When this option has the value "never", reserved words
- // and keywords can also not be used as property names.
- allowReserved: null,
- // When enabled, a return at the top level is not considered an
- // error.
- allowReturnOutsideFunction: false,
- // When enabled, import/export statements are not constrained to
- // appearing at the top of the program.
- allowImportExportEverywhere: false,
- // When enabled, hashbang directive in the beginning of file
- // is allowed and treated as a line comment.
- allowHashBang: false,
- // When `locations` is on, `loc` properties holding objects with
- // `start` and `end` properties in `{line, column}` form (with
- // line being 1-based and column 0-based) will be attached to the
- // nodes.
- locations: false,
- // A function can be passed as `onToken` option, which will
- // cause Acorn to call that function with object in the same
- // format as tokens returned from `tokenizer().getToken()`. Note
- // that you are not allowed to call the parser from the
- // callback—that will corrupt its internal state.
- onToken: null,
- // A function can be passed as `onComment` option, which will
- // cause Acorn to call that function with `(block, text, start,
- // end)` parameters whenever a comment is skipped. `block` is a
- // boolean indicating whether this is a block (`/* */`) comment,
- // `text` is the content of the comment, and `start` and `end` are
- // character offsets that denote the start and end of the comment.
- // When the `locations` option is on, two more parameters are
- // passed, the full `{line, column}` locations of the start and
- // end of the comments. Note that you are not allowed to call the
- // parser from the callback—that will corrupt its internal state.
- onComment: null,
- // Nodes have their start and end characters offsets recorded in
- // `start` and `end` properties (directly on the node, rather than
- // the `loc` object, which holds line/column data. To also add a
- // [semi-standardized][range] `range` property holding a `[start,
- // end]` array with the same numbers, set the `ranges` option to
- // `true`.
- //
- // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
- ranges: false,
- // It is possible to parse multiple files into a single AST by
- // passing the tree produced by parsing the first file as
- // `program` option in subsequent parses. This will add the
- // toplevel forms of the parsed file to the `Program` (top) node
- // of an existing parse tree.
- program: null,
- // When `locations` is on, you can pass this to record the source
- // file in every node's `loc` object.
- sourceFile: null,
- // This value, if given, is stored in every node, whether
- // `locations` is on or off.
- directSourceFile: null,
- // When enabled, parenthesized expressions are represented by
- // (non-standard) ParenthesizedExpression nodes
- preserveParens: false,
- plugins: {}
-};
-
-// Interpret and default an options object
-
-function getOptions(opts) {
- var options = {};
-
- for (var opt in defaultOptions)
- { options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]; }
-
- if (options.ecmaVersion >= 2015)
- { options.ecmaVersion -= 2009; }
-
- if (options.allowReserved == null)
- { options.allowReserved = options.ecmaVersion < 5; }
-
- if (isArray(options.onToken)) {
- var tokens = options.onToken;
- options.onToken = function (token) { return tokens.push(token); };
- }
- if (isArray(options.onComment))
- { options.onComment = pushComment(options, options.onComment); }
-
- return options
-}
-
-function pushComment(options, array) {
- return function(block, text, start, end, startLoc, endLoc) {
- var comment = {
- type: block ? "Block" : "Line",
- value: text,
- start: start,
- end: end
- };
- if (options.locations)
- { comment.loc = new SourceLocation(this, startLoc, endLoc); }
- if (options.ranges)
- { comment.range = [start, end]; }
- array.push(comment);
- }
-}
-
-// Registered plugins
-var plugins = {};
-
-function keywordRegexp(words) {
- return new RegExp("^(?:" + words.replace(/ /g, "|") + ")$")
-}
-
-var Parser = function Parser(options, input, startPos) {
- this.options = options = getOptions(options);
- this.sourceFile = options.sourceFile;
- this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5]);
- var reserved = "";
- if (!options.allowReserved) {
- for (var v = options.ecmaVersion;; v--)
- { if (reserved = reservedWords[v]) { break } }
- if (options.sourceType == "module") { reserved += " await"; }
- }
- this.reservedWords = keywordRegexp(reserved);
- var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict;
- this.reservedWordsStrict = keywordRegexp(reservedStrict);
- this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind);
- this.input = String(input);
-
- // Used to signal to callers of `readWord1` whether the word
- // contained any escape sequences. This is needed because words with
- // escape sequences must not be interpreted as keywords.
- this.containsEsc = false;
-
- // Load plugins
- this.loadPlugins(options.plugins);
-
- // Set up token state
-
- // The current position of the tokenizer in the input.
- if (startPos) {
- this.pos = startPos;
- this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1;
- this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
- } else {
- this.pos = this.lineStart = 0;
- this.curLine = 1;
- }
-
- // Properties of the current token:
- // Its type
- this.type = types.eof;
- // For tokens that include more information than their type, the value
- this.value = null;
- // Its start and end offset
- this.start = this.end = this.pos;
- // And, if locations are used, the {line, column} object
- // corresponding to those offsets
- this.startLoc = this.endLoc = this.curPosition();
-
- // Position information for the previous token
- this.lastTokEndLoc = this.lastTokStartLoc = null;
- this.lastTokStart = this.lastTokEnd = this.pos;
-
- // The context stack is used to superficially track syntactic
- // context to predict whether a regular expression is allowed in a
- // given position.
- this.context = this.initialContext();
- this.exprAllowed = true;
-
- // Figure out if it's a module code.
- this.inModule = options.sourceType === "module";
- this.strict = this.inModule || this.strictDirective(this.pos);
-
- // Used to signify the start of a potential arrow function
- this.potentialArrowAt = -1;
-
- // Flags to track whether we are in a function, a generator, an async function.
- this.inFunction = this.inGenerator = this.inAsync = false;
- // Positions to delayed-check that yield/await does not exist in default parameters.
- this.yieldPos = this.awaitPos = 0;
- // Labels in scope.
- this.labels = [];
-
- // If enabled, skip leading hashbang line.
- if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === "#!")
- { this.skipLineComment(2); }
-
- // Scope tracking for duplicate variable names (see scope.js)
- this.scopeStack = [];
- this.enterFunctionScope();
-};
-
-// DEPRECATED Kept for backwards compatibility until 3.0 in case a plugin uses them
-Parser.prototype.isKeyword = function isKeyword (word) { return this.keywords.test(word) };
-Parser.prototype.isReservedWord = function isReservedWord (word) { return this.reservedWords.test(word) };
-
-Parser.prototype.extend = function extend (name, f) {
- this[name] = f(this[name]);
-};
-
-Parser.prototype.loadPlugins = function loadPlugins (pluginConfigs) {
- var this$1 = this;
-
- for (var name in pluginConfigs) {
- var plugin = plugins[name];
- if (!plugin) { throw new Error("Plugin '" + name + "' not found") }
- plugin(this$1, pluginConfigs[name]);
- }
-};
-
-Parser.prototype.parse = function parse () {
- var node = this.options.program || this.startNode();
- this.nextToken();
- return this.parseTopLevel(node)
-};
-
-var pp = Parser.prototype;
-
-// ## Parser utilities
-
-var literal = /^(?:'((?:\\.|[^'])*?)'|"((?:\\.|[^"])*?)"|;)/;
-pp.strictDirective = function(start) {
- var this$1 = this;
-
- for (;;) {
- skipWhiteSpace.lastIndex = start;
- start += skipWhiteSpace.exec(this$1.input)[0].length;
- var match = literal.exec(this$1.input.slice(start));
- if (!match) { return false }
- if ((match[1] || match[2]) == "use strict") { return true }
- start += match[0].length;
- }
-};
-
-// Predicate that tests whether the next token is of the given
-// type, and if yes, consumes it as a side effect.
-
-pp.eat = function(type) {
- if (this.type === type) {
- this.next();
- return true
- } else {
- return false
- }
-};
-
-// Tests whether parsed token is a contextual keyword.
-
-pp.isContextual = function(name) {
- return this.type === types.name && this.value === name && !this.containsEsc
-};
-
-// Consumes contextual keyword if possible.
-
-pp.eatContextual = function(name) {
- if (!this.isContextual(name)) { return false }
- this.next();
- return true
-};
-
-// Asserts that following token is given contextual keyword.
-
-pp.expectContextual = function(name) {
- if (!this.eatContextual(name)) { this.unexpected(); }
-};
-
-// Test whether a semicolon can be inserted at the current position.
-
-pp.canInsertSemicolon = function() {
- return this.type === types.eof ||
- this.type === types.braceR ||
- lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
-};
-
-pp.insertSemicolon = function() {
- if (this.canInsertSemicolon()) {
- if (this.options.onInsertedSemicolon)
- { this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc); }
- return true
- }
-};
-
-// Consume a semicolon, or, failing that, see if we are allowed to
-// pretend that there is a semicolon at this position.
-
-pp.semicolon = function() {
- if (!this.eat(types.semi) && !this.insertSemicolon()) { this.unexpected(); }
-};
-
-pp.afterTrailingComma = function(tokType, notNext) {
- if (this.type == tokType) {
- if (this.options.onTrailingComma)
- { this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc); }
- if (!notNext)
- { this.next(); }
- return true
- }
-};
-
-// Expect a token of a given type. If found, consume it, otherwise,
-// raise an unexpected token error.
-
-pp.expect = function(type) {
- this.eat(type) || this.unexpected();
-};
-
-// Raise an unexpected token error.
-
-pp.unexpected = function(pos) {
- this.raise(pos != null ? pos : this.start, "Unexpected token");
-};
-
-function DestructuringErrors() {
- this.shorthandAssign =
- this.trailingComma =
- this.parenthesizedAssign =
- this.parenthesizedBind =
- this.doubleProto =
- -1;
-}
-
-pp.checkPatternErrors = function(refDestructuringErrors, isAssign) {
- if (!refDestructuringErrors) { return }
- if (refDestructuringErrors.trailingComma > -1)
- { this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element"); }
- var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind;
- if (parens > -1) { this.raiseRecoverable(parens, "Parenthesized pattern"); }
-};
-
-pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) {
- if (!refDestructuringErrors) { return false }
- var shorthandAssign = refDestructuringErrors.shorthandAssign;
- var doubleProto = refDestructuringErrors.doubleProto;
- if (!andThrow) { return shorthandAssign >= 0 || doubleProto >= 0 }
- if (shorthandAssign >= 0)
- { this.raise(shorthandAssign, "Shorthand property assignments are valid only in destructuring patterns"); }
- if (doubleProto >= 0)
- { this.raiseRecoverable(doubleProto, "Redefinition of __proto__ property"); }
-};
-
-pp.checkYieldAwaitInDefaultParams = function() {
- if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos))
- { this.raise(this.yieldPos, "Yield expression cannot be a default value"); }
- if (this.awaitPos)
- { this.raise(this.awaitPos, "Await expression cannot be a default value"); }
-};
-
-pp.isSimpleAssignTarget = function(expr) {
- if (expr.type === "ParenthesizedExpression")
- { return this.isSimpleAssignTarget(expr.expression) }
- return expr.type === "Identifier" || expr.type === "MemberExpression"
-};
-
-var pp$1 = Parser.prototype;
-
-// ### Statement parsing
-
-// Parse a program. Initializes the parser, reads any number of
-// statements, and wraps them in a Program node. Optionally takes a
-// `program` argument. If present, the statements will be appended
-// to its body instead of creating a new node.
-
-pp$1.parseTopLevel = function(node) {
- var this$1 = this;
-
- var exports = {};
- if (!node.body) { node.body = []; }
- while (this.type !== types.eof) {
- var stmt = this$1.parseStatement(true, true, exports);
- node.body.push(stmt);
- }
- this.adaptDirectivePrologue(node.body);
- this.next();
- if (this.options.ecmaVersion >= 6) {
- node.sourceType = this.options.sourceType;
- }
- return this.finishNode(node, "Program")
-};
-
-var loopLabel = {kind: "loop"};
-var switchLabel = {kind: "switch"};
-
-pp$1.isLet = function() {
- if (this.options.ecmaVersion < 6 || !this.isContextual("let")) { return false }
- skipWhiteSpace.lastIndex = this.pos;
- var skip = skipWhiteSpace.exec(this.input);
- var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next);
- if (nextCh === 91 || nextCh == 123) { return true } // '{' and '['
- if (isIdentifierStart(nextCh, true)) {
- var pos = next + 1;
- while (isIdentifierChar(this.input.charCodeAt(pos), true)) { ++pos; }
- var ident = this.input.slice(next, pos);
- if (!keywordRelationalOperator.test(ident)) { return true }
- }
- return false
-};
-
-// check 'async [no LineTerminator here] function'
-// - 'async /*foo*/ function' is OK.
-// - 'async /*\n*/ function' is invalid.
-pp$1.isAsyncFunction = function() {
- if (this.options.ecmaVersion < 8 || !this.isContextual("async"))
- { return false }
-
- skipWhiteSpace.lastIndex = this.pos;
- var skip = skipWhiteSpace.exec(this.input);
- var next = this.pos + skip[0].length;
- return !lineBreak.test(this.input.slice(this.pos, next)) &&
- this.input.slice(next, next + 8) === "function" &&
- (next + 8 == this.input.length || !isIdentifierChar(this.input.charAt(next + 8)))
-};
-
-// Parse a single statement.
-//
-// If expecting a statement and finding a slash operator, parse a
-// regular expression literal. This is to handle cases like
-// `if (foo) /blah/.exec(foo)`, where looking at the previous token
-// does not help.
-
-pp$1.parseStatement = function(declaration, topLevel, exports) {
- var starttype = this.type, node = this.startNode(), kind;
-
- if (this.isLet()) {
- starttype = types._var;
- kind = "let";
- }
-
- // Most types of statements are recognized by the keyword they
- // start with. Many are trivial to parse, some require a bit of
- // complexity.
-
- switch (starttype) {
- case types._break: case types._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
- case types._debugger: return this.parseDebuggerStatement(node)
- case types._do: return this.parseDoStatement(node)
- case types._for: return this.parseForStatement(node)
- case types._function:
- if (!declaration && this.options.ecmaVersion >= 6) { this.unexpected(); }
- return this.parseFunctionStatement(node, false)
- case types._class:
- if (!declaration) { this.unexpected(); }
- return this.parseClass(node, true)
- case types._if: return this.parseIfStatement(node)
- case types._return: return this.parseReturnStatement(node)
- case types._switch: return this.parseSwitchStatement(node)
- case types._throw: return this.parseThrowStatement(node)
- case types._try: return this.parseTryStatement(node)
- case types._const: case types._var:
- kind = kind || this.value;
- if (!declaration && kind != "var") { this.unexpected(); }
- return this.parseVarStatement(node, kind)
- case types._while: return this.parseWhileStatement(node)
- case types._with: return this.parseWithStatement(node)
- case types.braceL: return this.parseBlock()
- case types.semi: return this.parseEmptyStatement(node)
- case types._export:
- case types._import:
- if (!this.options.allowImportExportEverywhere) {
- if (!topLevel)
- { this.raise(this.start, "'import' and 'export' may only appear at the top level"); }
- if (!this.inModule)
- { this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'"); }
- }
- return starttype === types._import ? this.parseImport(node) : this.parseExport(node, exports)
-
- // If the statement does not start with a statement keyword or a
- // brace, it's an ExpressionStatement or LabeledStatement. We
- // simply start parsing an expression, and afterwards, if the
- // next token is a colon and the expression was a simple
- // Identifier node, we switch to interpreting it as a label.
- default:
- if (this.isAsyncFunction()) {
- if (!declaration) { this.unexpected(); }
- this.next();
- return this.parseFunctionStatement(node, true)
- }
-
- var maybeName = this.value, expr = this.parseExpression();
- if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon))
- { return this.parseLabeledStatement(node, maybeName, expr) }
- else { return this.parseExpressionStatement(node, expr) }
- }
-};
-
-pp$1.parseBreakContinueStatement = function(node, keyword) {
- var this$1 = this;
-
- var isBreak = keyword == "break";
- this.next();
- if (this.eat(types.semi) || this.insertSemicolon()) { node.label = null; }
- else if (this.type !== types.name) { this.unexpected(); }
- else {
- node.label = this.parseIdent();
- this.semicolon();
- }
-
- // Verify that there is an actual destination to break or
- // continue to.
- var i = 0;
- for (; i < this.labels.length; ++i) {
- var lab = this$1.labels[i];
- if (node.label == null || lab.name === node.label.name) {
- if (lab.kind != null && (isBreak || lab.kind === "loop")) { break }
- if (node.label && isBreak) { break }
- }
- }
- if (i === this.labels.length) { this.raise(node.start, "Unsyntactic " + keyword); }
- return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
-};
-
-pp$1.parseDebuggerStatement = function(node) {
- this.next();
- this.semicolon();
- return this.finishNode(node, "DebuggerStatement")
-};
-
-pp$1.parseDoStatement = function(node) {
- this.next();
- this.labels.push(loopLabel);
- node.body = this.parseStatement(false);
- this.labels.pop();
- this.expect(types._while);
- node.test = this.parseParenExpression();
- if (this.options.ecmaVersion >= 6)
- { this.eat(types.semi); }
- else
- { this.semicolon(); }
- return this.finishNode(node, "DoWhileStatement")
-};
-
-// Disambiguating between a `for` and a `for`/`in` or `for`/`of`
-// loop is non-trivial. Basically, we have to parse the init `var`
-// statement or expression, disallowing the `in` operator (see
-// the second parameter to `parseExpression`), and then check
-// whether the next token is `in` or `of`. When there is no init
-// part (semicolon immediately after the opening parenthesis), it
-// is a regular `for` loop.
-
-pp$1.parseForStatement = function(node) {
- this.next();
- var awaitAt = (this.options.ecmaVersion >= 9 && this.inAsync && this.eatContextual("await")) ? this.lastTokStart : -1;
- this.labels.push(loopLabel);
- this.enterLexicalScope();
- this.expect(types.parenL);
- if (this.type === types.semi) {
- if (awaitAt > -1) { this.unexpected(awaitAt); }
- return this.parseFor(node, null)
- }
- var isLet = this.isLet();
- if (this.type === types._var || this.type === types._const || isLet) {
- var init$1 = this.startNode(), kind = isLet ? "let" : this.value;
- this.next();
- this.parseVar(init$1, true, kind);
- this.finishNode(init$1, "VariableDeclaration");
- if ((this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 &&
- !(kind !== "var" && init$1.declarations[0].init)) {
- if (this.options.ecmaVersion >= 9) {
- if (this.type === types._in) {
- if (awaitAt > -1) { this.unexpected(awaitAt); }
- } else { node.await = awaitAt > -1; }
- }
- return this.parseForIn(node, init$1)
- }
- if (awaitAt > -1) { this.unexpected(awaitAt); }
- return this.parseFor(node, init$1)
- }
- var refDestructuringErrors = new DestructuringErrors;
- var init = this.parseExpression(true, refDestructuringErrors);
- if (this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
- if (this.options.ecmaVersion >= 9) {
- if (this.type === types._in) {
- if (awaitAt > -1) { this.unexpected(awaitAt); }
- } else { node.await = awaitAt > -1; }
- }
- this.toAssignable(init, false, refDestructuringErrors);
- this.checkLVal(init);
- return this.parseForIn(node, init)
- } else {
- this.checkExpressionErrors(refDestructuringErrors, true);
- }
- if (awaitAt > -1) { this.unexpected(awaitAt); }
- return this.parseFor(node, init)
-};
-
-pp$1.parseFunctionStatement = function(node, isAsync) {
- this.next();
- return this.parseFunction(node, true, false, isAsync)
-};
-
-pp$1.parseIfStatement = function(node) {
- this.next();
- node.test = this.parseParenExpression();
- // allow function declarations in branches, but only in non-strict mode
- node.consequent = this.parseStatement(!this.strict && this.type == types._function);
- node.alternate = this.eat(types._else) ? this.parseStatement(!this.strict && this.type == types._function) : null;
- return this.finishNode(node, "IfStatement")
-};
-
-pp$1.parseReturnStatement = function(node) {
- if (!this.inFunction && !this.options.allowReturnOutsideFunction)
- { this.raise(this.start, "'return' outside of function"); }
- this.next();
-
- // In `return` (and `break`/`continue`), the keywords with
- // optional arguments, we eagerly look for a semicolon or the
- // possibility to insert one.
-
- if (this.eat(types.semi) || this.insertSemicolon()) { node.argument = null; }
- else { node.argument = this.parseExpression(); this.semicolon(); }
- return this.finishNode(node, "ReturnStatement")
-};
-
-pp$1.parseSwitchStatement = function(node) {
- var this$1 = this;
-
- this.next();
- node.discriminant = this.parseParenExpression();
- node.cases = [];
- this.expect(types.braceL);
- this.labels.push(switchLabel);
- this.enterLexicalScope();
-
- // Statements under must be grouped (by label) in SwitchCase
- // nodes. `cur` is used to keep the node that we are currently
- // adding statements to.
-
- var cur;
- for (var sawDefault = false; this.type != types.braceR;) {
- if (this$1.type === types._case || this$1.type === types._default) {
- var isCase = this$1.type === types._case;
- if (cur) { this$1.finishNode(cur, "SwitchCase"); }
- node.cases.push(cur = this$1.startNode());
- cur.consequent = [];
- this$1.next();
- if (isCase) {
- cur.test = this$1.parseExpression();
- } else {
- if (sawDefault) { this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses"); }
- sawDefault = true;
- cur.test = null;
- }
- this$1.expect(types.colon);
- } else {
- if (!cur) { this$1.unexpected(); }
- cur.consequent.push(this$1.parseStatement(true));
- }
- }
- this.exitLexicalScope();
- if (cur) { this.finishNode(cur, "SwitchCase"); }
- this.next(); // Closing brace
- this.labels.pop();
- return this.finishNode(node, "SwitchStatement")
-};
-
-pp$1.parseThrowStatement = function(node) {
- this.next();
- if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
- { this.raise(this.lastTokEnd, "Illegal newline after throw"); }
- node.argument = this.parseExpression();
- this.semicolon();
- return this.finishNode(node, "ThrowStatement")
-};
-
-// Reused empty array added for node fields that are always empty.
-
-var empty = [];
-
-pp$1.parseTryStatement = function(node) {
- this.next();
- node.block = this.parseBlock();
- node.handler = null;
- if (this.type === types._catch) {
- var clause = this.startNode();
- this.next();
- this.expect(types.parenL);
- clause.param = this.parseBindingAtom();
- this.enterLexicalScope();
- this.checkLVal(clause.param, "let");
- this.expect(types.parenR);
- clause.body = this.parseBlock(false);
- this.exitLexicalScope();
- node.handler = this.finishNode(clause, "CatchClause");
- }
- node.finalizer = this.eat(types._finally) ? this.parseBlock() : null;
- if (!node.handler && !node.finalizer)
- { this.raise(node.start, "Missing catch or finally clause"); }
- return this.finishNode(node, "TryStatement")
-};
-
-pp$1.parseVarStatement = function(node, kind) {
- this.next();
- this.parseVar(node, false, kind);
- this.semicolon();
- return this.finishNode(node, "VariableDeclaration")
-};
-
-pp$1.parseWhileStatement = function(node) {
- this.next();
- node.test = this.parseParenExpression();
- this.labels.push(loopLabel);
- node.body = this.parseStatement(false);
- this.labels.pop();
- return this.finishNode(node, "WhileStatement")
-};
-
-pp$1.parseWithStatement = function(node) {
- if (this.strict) { this.raise(this.start, "'with' in strict mode"); }
- this.next();
- node.object = this.parseParenExpression();
- node.body = this.parseStatement(false);
- return this.finishNode(node, "WithStatement")
-};
-
-pp$1.parseEmptyStatement = function(node) {
- this.next();
- return this.finishNode(node, "EmptyStatement")
-};
-
-pp$1.parseLabeledStatement = function(node, maybeName, expr) {
- var this$1 = this;
-
- for (var i$1 = 0, list = this$1.labels; i$1 < list.length; i$1 += 1)
- {
- var label = list[i$1];
-
- if (label.name === maybeName)
- { this$1.raise(expr.start, "Label '" + maybeName + "' is already declared");
- } }
- var kind = this.type.isLoop ? "loop" : this.type === types._switch ? "switch" : null;
- for (var i = this.labels.length - 1; i >= 0; i--) {
- var label$1 = this$1.labels[i];
- if (label$1.statementStart == node.start) {
- // Update information about previous labels on this node
- label$1.statementStart = this$1.start;
- label$1.kind = kind;
- } else { break }
- }
- this.labels.push({name: maybeName, kind: kind, statementStart: this.start});
- node.body = this.parseStatement(true);
- if (node.body.type == "ClassDeclaration" ||
- node.body.type == "VariableDeclaration" && node.body.kind != "var" ||
- node.body.type == "FunctionDeclaration" && (this.strict || node.body.generator))
- { this.raiseRecoverable(node.body.start, "Invalid labeled declaration"); }
- this.labels.pop();
- node.label = expr;
- return this.finishNode(node, "LabeledStatement")
-};
-
-pp$1.parseExpressionStatement = function(node, expr) {
- node.expression = expr;
- this.semicolon();
- return this.finishNode(node, "ExpressionStatement")
-};
-
-// Parse a semicolon-enclosed block of statements, handling `"use
-// strict"` declarations when `allowStrict` is true (used for
-// function bodies).
-
-pp$1.parseBlock = function(createNewLexicalScope) {
- var this$1 = this;
- if ( createNewLexicalScope === void 0 ) createNewLexicalScope = true;
-
- var node = this.startNode();
- node.body = [];
- this.expect(types.braceL);
- if (createNewLexicalScope) {
- this.enterLexicalScope();
- }
- while (!this.eat(types.braceR)) {
- var stmt = this$1.parseStatement(true);
- node.body.push(stmt);
- }
- if (createNewLexicalScope) {
- this.exitLexicalScope();
- }
- return this.finishNode(node, "BlockStatement")
-};
-
-// Parse a regular `for` loop. The disambiguation code in
-// `parseStatement` will already have parsed the init statement or
-// expression.
-
-pp$1.parseFor = function(node, init) {
- node.init = init;
- this.expect(types.semi);
- node.test = this.type === types.semi ? null : this.parseExpression();
- this.expect(types.semi);
- node.update = this.type === types.parenR ? null : this.parseExpression();
- this.expect(types.parenR);
- this.exitLexicalScope();
- node.body = this.parseStatement(false);
- this.labels.pop();
- return this.finishNode(node, "ForStatement")
-};
-
-// Parse a `for`/`in` and `for`/`of` loop, which are almost
-// same from parser's perspective.
-
-pp$1.parseForIn = function(node, init) {
- var type = this.type === types._in ? "ForInStatement" : "ForOfStatement";
- this.next();
- if (type == "ForInStatement") {
- if (init.type === "AssignmentPattern" ||
- (init.type === "VariableDeclaration" && init.declarations[0].init != null &&
- (this.strict || init.declarations[0].id.type !== "Identifier")))
- { this.raise(init.start, "Invalid assignment in for-in loop head"); }
- }
- node.left = init;
- node.right = type == "ForInStatement" ? this.parseExpression() : this.parseMaybeAssign();
- this.expect(types.parenR);
- this.exitLexicalScope();
- node.body = this.parseStatement(false);
- this.labels.pop();
- return this.finishNode(node, type)
-};
-
-// Parse a list of variable declarations.
-
-pp$1.parseVar = function(node, isFor, kind) {
- var this$1 = this;
-
- node.declarations = [];
- node.kind = kind;
- for (;;) {
- var decl = this$1.startNode();
- this$1.parseVarId(decl, kind);
- if (this$1.eat(types.eq)) {
- decl.init = this$1.parseMaybeAssign(isFor);
- } else if (kind === "const" && !(this$1.type === types._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) {
- this$1.unexpected();
- } else if (decl.id.type != "Identifier" && !(isFor && (this$1.type === types._in || this$1.isContextual("of")))) {
- this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value");
- } else {
- decl.init = null;
- }
- node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"));
- if (!this$1.eat(types.comma)) { break }
- }
- return node
-};
-
-pp$1.parseVarId = function(decl, kind) {
- decl.id = this.parseBindingAtom(kind);
- this.checkLVal(decl.id, kind, false);
-};
-
-// Parse a function declaration or literal (depending on the
-// `isStatement` parameter).
-
-pp$1.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) {
- this.initFunction(node);
- if (this.options.ecmaVersion >= 9 || this.options.ecmaVersion >= 6 && !isAsync)
- { node.generator = this.eat(types.star); }
- if (this.options.ecmaVersion >= 8)
- { node.async = !!isAsync; }
-
- if (isStatement) {
- node.id = isStatement === "nullableID" && this.type != types.name ? null : this.parseIdent();
- if (node.id) {
- this.checkLVal(node.id, "var");
- }
- }
-
- var oldInGen = this.inGenerator, oldInAsync = this.inAsync,
- oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
- this.inGenerator = node.generator;
- this.inAsync = node.async;
- this.yieldPos = 0;
- this.awaitPos = 0;
- this.inFunction = true;
- this.enterFunctionScope();
-
- if (!isStatement)
- { node.id = this.type == types.name ? this.parseIdent() : null; }
-
- this.parseFunctionParams(node);
- this.parseFunctionBody(node, allowExpressionBody);
-
- this.inGenerator = oldInGen;
- this.inAsync = oldInAsync;
- this.yieldPos = oldYieldPos;
- this.awaitPos = oldAwaitPos;
- this.inFunction = oldInFunc;
- return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
-};
-
-pp$1.parseFunctionParams = function(node) {
- this.expect(types.parenL);
- node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
- this.checkYieldAwaitInDefaultParams();
-};
-
-// Parse a class declaration or literal (depending on the
-// `isStatement` parameter).
-
-pp$1.parseClass = function(node, isStatement) {
- var this$1 = this;
-
- this.next();
-
- this.parseClassId(node, isStatement);
- this.parseClassSuper(node);
- var classBody = this.startNode();
- var hadConstructor = false;
- classBody.body = [];
- this.expect(types.braceL);
- while (!this.eat(types.braceR)) {
- var member = this$1.parseClassMember(classBody);
- if (member && member.type === "MethodDefinition" && member.kind === "constructor") {
- if (hadConstructor) { this$1.raise(member.start, "Duplicate constructor in the same class"); }
- hadConstructor = true;
- }
- }
- node.body = this.finishNode(classBody, "ClassBody");
- return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
-};
-
-pp$1.parseClassMember = function(classBody) {
- var this$1 = this;
-
- if (this.eat(types.semi)) { return null }
-
- var method = this.startNode();
- var tryContextual = function (k, noLineBreak) {
- if ( noLineBreak === void 0 ) noLineBreak = false;
-
- var start = this$1.start, startLoc = this$1.startLoc;
- if (!this$1.eatContextual(k)) { return false }
- if (this$1.type !== types.parenL && (!noLineBreak || !this$1.canInsertSemicolon())) { return true }
- if (method.key) { this$1.unexpected(); }
- method.computed = false;
- method.key = this$1.startNodeAt(start, startLoc);
- method.key.name = k;
- this$1.finishNode(method.key, "Identifier");
- return false
- };
-
- method.kind = "method";
- method.static = tryContextual("static");
- var isGenerator = this.eat(types.star);
- var isAsync = false;
- if (!isGenerator) {
- if (this.options.ecmaVersion >= 8 && tryContextual("async", true)) {
- isAsync = true;
- isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star);
- } else if (tryContextual("get")) {
- method.kind = "get";
- } else if (tryContextual("set")) {
- method.kind = "set";
- }
- }
- if (!method.key) { this.parsePropertyName(method); }
- var key = method.key;
- if (!method.computed && !method.static && (key.type === "Identifier" && key.name === "constructor" ||
- key.type === "Literal" && key.value === "constructor")) {
- if (method.kind !== "method") { this.raise(key.start, "Constructor can't have get/set modifier"); }
- if (isGenerator) { this.raise(key.start, "Constructor can't be a generator"); }
- if (isAsync) { this.raise(key.start, "Constructor can't be an async method"); }
- method.kind = "constructor";
- } else if (method.static && key.type === "Identifier" && key.name === "prototype") {
- this.raise(key.start, "Classes may not have a static property named prototype");
- }
- this.parseClassMethod(classBody, method, isGenerator, isAsync);
- if (method.kind === "get" && method.value.params.length !== 0)
- { this.raiseRecoverable(method.value.start, "getter should have no params"); }
- if (method.kind === "set" && method.value.params.length !== 1)
- { this.raiseRecoverable(method.value.start, "setter should have exactly one param"); }
- if (method.kind === "set" && method.value.params[0].type === "RestElement")
- { this.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params"); }
- return method
-};
-
-pp$1.parseClassMethod = function(classBody, method, isGenerator, isAsync) {
- method.value = this.parseMethod(isGenerator, isAsync);
- classBody.body.push(this.finishNode(method, "MethodDefinition"));
-};
-
-pp$1.parseClassId = function(node, isStatement) {
- node.id = this.type === types.name ? this.parseIdent() : isStatement === true ? this.unexpected() : null;
-};
-
-pp$1.parseClassSuper = function(node) {
- node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null;
-};
-
-// Parses module export declaration.
-
-pp$1.parseExport = function(node, exports) {
- var this$1 = this;
-
- this.next();
- // export * from '...'
- if (this.eat(types.star)) {
- this.expectContextual("from");
- if (this.type !== types.string) { this.unexpected(); }
- node.source = this.parseExprAtom();
- this.semicolon();
- return this.finishNode(node, "ExportAllDeclaration")
- }
- if (this.eat(types._default)) { // export default ...
- this.checkExport(exports, "default", this.lastTokStart);
- var isAsync;
- if (this.type === types._function || (isAsync = this.isAsyncFunction())) {
- var fNode = this.startNode();
- this.next();
- if (isAsync) { this.next(); }
- node.declaration = this.parseFunction(fNode, "nullableID", false, isAsync);
- } else if (this.type === types._class) {
- var cNode = this.startNode();
- node.declaration = this.parseClass(cNode, "nullableID");
- } else {
- node.declaration = this.parseMaybeAssign();
- this.semicolon();
- }
- return this.finishNode(node, "ExportDefaultDeclaration")
- }
- // export var|const|let|function|class ...
- if (this.shouldParseExportStatement()) {
- node.declaration = this.parseStatement(true);
- if (node.declaration.type === "VariableDeclaration")
- { this.checkVariableExport(exports, node.declaration.declarations); }
- else
- { this.checkExport(exports, node.declaration.id.name, node.declaration.id.start); }
- node.specifiers = [];
- node.source = null;
- } else { // export { x, y as z } [from '...']
- node.declaration = null;
- node.specifiers = this.parseExportSpecifiers(exports);
- if (this.eatContextual("from")) {
- if (this.type !== types.string) { this.unexpected(); }
- node.source = this.parseExprAtom();
- } else {
- // check for keywords used as local names
- for (var i = 0, list = node.specifiers; i < list.length; i += 1) {
- var spec = list[i];
-
- this$1.checkUnreserved(spec.local);
- }
-
- node.source = null;
- }
- this.semicolon();
- }
- return this.finishNode(node, "ExportNamedDeclaration")
-};
-
-pp$1.checkExport = function(exports, name, pos) {
- if (!exports) { return }
- if (has(exports, name))
- { this.raiseRecoverable(pos, "Duplicate export '" + name + "'"); }
- exports[name] = true;
-};
-
-pp$1.checkPatternExport = function(exports, pat) {
- var this$1 = this;
-
- var type = pat.type;
- if (type == "Identifier")
- { this.checkExport(exports, pat.name, pat.start); }
- else if (type == "ObjectPattern")
- { for (var i = 0, list = pat.properties; i < list.length; i += 1)
- {
- var prop = list[i];
-
- this$1.checkPatternExport(exports, prop);
- } }
- else if (type == "ArrayPattern")
- { for (var i$1 = 0, list$1 = pat.elements; i$1 < list$1.length; i$1 += 1) {
- var elt = list$1[i$1];
-
- if (elt) { this$1.checkPatternExport(exports, elt); }
- } }
- else if (type == "Property")
- { this.checkPatternExport(exports, pat.value); }
- else if (type == "AssignmentPattern")
- { this.checkPatternExport(exports, pat.left); }
- else if (type == "RestElement")
- { this.checkPatternExport(exports, pat.argument); }
- else if (type == "ParenthesizedExpression")
- { this.checkPatternExport(exports, pat.expression); }
-};
-
-pp$1.checkVariableExport = function(exports, decls) {
- var this$1 = this;
-
- if (!exports) { return }
- for (var i = 0, list = decls; i < list.length; i += 1)
- {
- var decl = list[i];
-
- this$1.checkPatternExport(exports, decl.id);
- }
-};
-
-pp$1.shouldParseExportStatement = function() {
- return this.type.keyword === "var" ||
- this.type.keyword === "const" ||
- this.type.keyword === "class" ||
- this.type.keyword === "function" ||
- this.isLet() ||
- this.isAsyncFunction()
-};
-
-// Parses a comma-separated list of module exports.
-
-pp$1.parseExportSpecifiers = function(exports) {
- var this$1 = this;
-
- var nodes = [], first = true;
- // export { x, y as z } [from '...']
- this.expect(types.braceL);
- while (!this.eat(types.braceR)) {
- if (!first) {
- this$1.expect(types.comma);
- if (this$1.afterTrailingComma(types.braceR)) { break }
- } else { first = false; }
-
- var node = this$1.startNode();
- node.local = this$1.parseIdent(true);
- node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local;
- this$1.checkExport(exports, node.exported.name, node.exported.start);
- nodes.push(this$1.finishNode(node, "ExportSpecifier"));
- }
- return nodes
-};
-
-// Parses import declaration.
-
-pp$1.parseImport = function(node) {
- this.next();
- // import '...'
- if (this.type === types.string) {
- node.specifiers = empty;
- node.source = this.parseExprAtom();
- } else {
- node.specifiers = this.parseImportSpecifiers();
- this.expectContextual("from");
- node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
- }
- this.semicolon();
- return this.finishNode(node, "ImportDeclaration")
-};
-
-// Parses a comma-separated list of module imports.
-
-pp$1.parseImportSpecifiers = function() {
- var this$1 = this;
-
- var nodes = [], first = true;
- if (this.type === types.name) {
- // import defaultObj, { x, y as z } from '...'
- var node = this.startNode();
- node.local = this.parseIdent();
- this.checkLVal(node.local, "let");
- nodes.push(this.finishNode(node, "ImportDefaultSpecifier"));
- if (!this.eat(types.comma)) { return nodes }
- }
- if (this.type === types.star) {
- var node$1 = this.startNode();
- this.next();
- this.expectContextual("as");
- node$1.local = this.parseIdent();
- this.checkLVal(node$1.local, "let");
- nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier"));
- return nodes
- }
- this.expect(types.braceL);
- while (!this.eat(types.braceR)) {
- if (!first) {
- this$1.expect(types.comma);
- if (this$1.afterTrailingComma(types.braceR)) { break }
- } else { first = false; }
-
- var node$2 = this$1.startNode();
- node$2.imported = this$1.parseIdent(true);
- if (this$1.eatContextual("as")) {
- node$2.local = this$1.parseIdent();
- } else {
- this$1.checkUnreserved(node$2.imported);
- node$2.local = node$2.imported;
- }
- this$1.checkLVal(node$2.local, "let");
- nodes.push(this$1.finishNode(node$2, "ImportSpecifier"));
- }
- return nodes
-};
-
-// Set `ExpressionStatement#directive` property for directive prologues.
-pp$1.adaptDirectivePrologue = function(statements) {
- for (var i = 0; i < statements.length && this.isDirectiveCandidate(statements[i]); ++i) {
- statements[i].directive = statements[i].expression.raw.slice(1, -1);
- }
-};
-pp$1.isDirectiveCandidate = function(statement) {
- return (
- statement.type === "ExpressionStatement" &&
- statement.expression.type === "Literal" &&
- typeof statement.expression.value === "string" &&
- // Reject parenthesized strings.
- (this.input[statement.start] === "\"" || this.input[statement.start] === "'")
- )
-};
-
-var pp$2 = Parser.prototype;
-
-// Convert existing expression atom to assignable pattern
-// if possible.
-
-pp$2.toAssignable = function(node, isBinding, refDestructuringErrors) {
- var this$1 = this;
-
- if (this.options.ecmaVersion >= 6 && node) {
- switch (node.type) {
- case "Identifier":
- if (this.inAsync && node.name === "await")
- { this.raise(node.start, "Can not use 'await' as identifier inside an async function"); }
- break
-
- case "ObjectPattern":
- case "ArrayPattern":
- case "RestElement":
- break
-
- case "ObjectExpression":
- node.type = "ObjectPattern";
- if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
- for (var i = 0, list = node.properties; i < list.length; i += 1) {
- var prop = list[i];
-
- this$1.toAssignable(prop, isBinding);
- // Early error:
- // AssignmentRestProperty[Yield, Await] :
- // `...` DestructuringAssignmentTarget[Yield, Await]
- //
- // It is a Syntax Error if |DestructuringAssignmentTarget| is an |ArrayLiteral| or an |ObjectLiteral|.
- if (
- prop.type === "RestElement" &&
- (prop.argument.type === "ArrayPattern" || prop.argument.type === "ObjectPattern")
- ) {
- this$1.raise(prop.argument.start, "Unexpected token");
- }
- }
- break
-
- case "Property":
- // AssignmentProperty has type == "Property"
- if (node.kind !== "init") { this.raise(node.key.start, "Object pattern can't contain getter or setter"); }
- this.toAssignable(node.value, isBinding);
- break
-
- case "ArrayExpression":
- node.type = "ArrayPattern";
- if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
- this.toAssignableList(node.elements, isBinding);
- break
-
- case "SpreadElement":
- node.type = "RestElement";
- this.toAssignable(node.argument, isBinding);
- if (node.argument.type === "AssignmentPattern")
- { this.raise(node.argument.start, "Rest elements cannot have a default value"); }
- break
-
- case "AssignmentExpression":
- if (node.operator !== "=") { this.raise(node.left.end, "Only '=' operator can be used for specifying default value."); }
- node.type = "AssignmentPattern";
- delete node.operator;
- this.toAssignable(node.left, isBinding);
- // falls through to AssignmentPattern
-
- case "AssignmentPattern":
- break
-
- case "ParenthesizedExpression":
- this.toAssignable(node.expression, isBinding);
- break
-
- case "MemberExpression":
- if (!isBinding) { break }
-
- default:
- this.raise(node.start, "Assigning to rvalue");
- }
- } else if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
- return node
-};
-
-// Convert list of expression atoms to binding list.
-
-pp$2.toAssignableList = function(exprList, isBinding) {
- var this$1 = this;
-
- var end = exprList.length;
- for (var i = 0; i < end; i++) {
- var elt = exprList[i];
- if (elt) { this$1.toAssignable(elt, isBinding); }
- }
- if (end) {
- var last = exprList[end - 1];
- if (this.options.ecmaVersion === 6 && isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
- { this.unexpected(last.argument.start); }
- }
- return exprList
-};
-
-// Parses spread element.
-
-pp$2.parseSpread = function(refDestructuringErrors) {
- var node = this.startNode();
- this.next();
- node.argument = this.parseMaybeAssign(false, refDestructuringErrors);
- return this.finishNode(node, "SpreadElement")
-};
-
-pp$2.parseRestBinding = function() {
- var node = this.startNode();
- this.next();
-
- // RestElement inside of a function parameter must be an identifier
- if (this.options.ecmaVersion === 6 && this.type !== types.name)
- { this.unexpected(); }
-
- node.argument = this.parseBindingAtom();
-
- return this.finishNode(node, "RestElement")
-};
-
-// Parses lvalue (assignable) atom.
-
-pp$2.parseBindingAtom = function() {
- if (this.options.ecmaVersion >= 6) {
- switch (this.type) {
- case types.bracketL:
- var node = this.startNode();
- this.next();
- node.elements = this.parseBindingList(types.bracketR, true, true);
- return this.finishNode(node, "ArrayPattern")
-
- case types.braceL:
- return this.parseObj(true)
- }
- }
- return this.parseIdent()
-};
-
-pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma) {
- var this$1 = this;
-
- var elts = [], first = true;
- while (!this.eat(close)) {
- if (first) { first = false; }
- else { this$1.expect(types.comma); }
- if (allowEmpty && this$1.type === types.comma) {
- elts.push(null);
- } else if (allowTrailingComma && this$1.afterTrailingComma(close)) {
- break
- } else if (this$1.type === types.ellipsis) {
- var rest = this$1.parseRestBinding();
- this$1.parseBindingListItem(rest);
- elts.push(rest);
- if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); }
- this$1.expect(close);
- break
- } else {
- var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc);
- this$1.parseBindingListItem(elem);
- elts.push(elem);
- }
- }
- return elts
-};
-
-pp$2.parseBindingListItem = function(param) {
- return param
-};
-
-// Parses assignment pattern around given atom if possible.
-
-pp$2.parseMaybeDefault = function(startPos, startLoc, left) {
- left = left || this.parseBindingAtom();
- if (this.options.ecmaVersion < 6 || !this.eat(types.eq)) { return left }
- var node = this.startNodeAt(startPos, startLoc);
- node.left = left;
- node.right = this.parseMaybeAssign();
- return this.finishNode(node, "AssignmentPattern")
-};
-
-// Verify that a node is an lval — something that can be assigned
-// to.
-// bindingType can be either:
-// 'var' indicating that the lval creates a 'var' binding
-// 'let' indicating that the lval creates a lexical ('let' or 'const') binding
-// 'none' indicating that the binding should be checked for illegal identifiers, but not for duplicate references
-
-pp$2.checkLVal = function(expr, bindingType, checkClashes) {
- var this$1 = this;
-
- switch (expr.type) {
- case "Identifier":
- if (this.strict && this.reservedWordsStrictBind.test(expr.name))
- { this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode"); }
- if (checkClashes) {
- if (has(checkClashes, expr.name))
- { this.raiseRecoverable(expr.start, "Argument name clash"); }
- checkClashes[expr.name] = true;
- }
- if (bindingType && bindingType !== "none") {
- if (
- bindingType === "var" && !this.canDeclareVarName(expr.name) ||
- bindingType !== "var" && !this.canDeclareLexicalName(expr.name)
- ) {
- this.raiseRecoverable(expr.start, ("Identifier '" + (expr.name) + "' has already been declared"));
- }
- if (bindingType === "var") {
- this.declareVarName(expr.name);
- } else {
- this.declareLexicalName(expr.name);
- }
- }
- break
-
- case "MemberExpression":
- if (bindingType) { this.raiseRecoverable(expr.start, "Binding member expression"); }
- break
-
- case "ObjectPattern":
- for (var i = 0, list = expr.properties; i < list.length; i += 1)
- {
- var prop = list[i];
-
- this$1.checkLVal(prop, bindingType, checkClashes);
- }
- break
-
- case "Property":
- // AssignmentProperty has type == "Property"
- this.checkLVal(expr.value, bindingType, checkClashes);
- break
-
- case "ArrayPattern":
- for (var i$1 = 0, list$1 = expr.elements; i$1 < list$1.length; i$1 += 1) {
- var elem = list$1[i$1];
-
- if (elem) { this$1.checkLVal(elem, bindingType, checkClashes); }
- }
- break
-
- case "AssignmentPattern":
- this.checkLVal(expr.left, bindingType, checkClashes);
- break
-
- case "RestElement":
- this.checkLVal(expr.argument, bindingType, checkClashes);
- break
-
- case "ParenthesizedExpression":
- this.checkLVal(expr.expression, bindingType, checkClashes);
- break
-
- default:
- this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue");
- }
-};
-
-// A recursive descent parser operates by defining functions for all
-// syntactic elements, and recursively calling those, each function
-// advancing the input stream and returning an AST node. Precedence
-// of constructs (for example, the fact that `!x[1]` means `!(x[1])`
-// instead of `(!x)[1]` is handled by the fact that the parser
-// function that parses unary prefix operators is called first, and
-// in turn calls the function that parses `[]` subscripts — that
-// way, it'll receive the node for `x[1]` already parsed, and wraps
-// *that* in the unary operator node.
-//
-// Acorn uses an [operator precedence parser][opp] to handle binary
-// operator precedence, because it is much more compact than using
-// the technique outlined above, which uses different, nesting
-// functions to specify precedence, for all of the ten binary
-// precedence levels that JavaScript defines.
-//
-// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser
-
-var pp$3 = Parser.prototype;
-
-// Check if property name clashes with already added.
-// Object/class getters and setters are not allowed to clash —
-// either with each other or with an init property — and in
-// strict mode, init properties are also not allowed to be repeated.
-
-pp$3.checkPropClash = function(prop, propHash, refDestructuringErrors) {
- if (this.options.ecmaVersion >= 9 && prop.type === "SpreadElement")
- { return }
- if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand))
- { return }
- var key = prop.key;
- var name;
- switch (key.type) {
- case "Identifier": name = key.name; break
- case "Literal": name = String(key.value); break
- default: return
- }
- var kind = prop.kind;
- if (this.options.ecmaVersion >= 6) {
- if (name === "__proto__" && kind === "init") {
- if (propHash.proto) {
- if (refDestructuringErrors && refDestructuringErrors.doubleProto < 0) { refDestructuringErrors.doubleProto = key.start; }
- // Backwards-compat kludge. Can be removed in version 6.0
- else { this.raiseRecoverable(key.start, "Redefinition of __proto__ property"); }
- }
- propHash.proto = true;
- }
- return
- }
- name = "$" + name;
- var other = propHash[name];
- if (other) {
- var redefinition;
- if (kind === "init") {
- redefinition = this.strict && other.init || other.get || other.set;
- } else {
- redefinition = other.init || other[kind];
- }
- if (redefinition)
- { this.raiseRecoverable(key.start, "Redefinition of property"); }
- } else {
- other = propHash[name] = {
- init: false,
- get: false,
- set: false
- };
- }
- other[kind] = true;
-};
-
-// ### Expression parsing
-
-// These nest, from the most general expression type at the top to
-// 'atomic', nondivisible expression types at the bottom. Most of
-// the functions will simply let the function(s) below them parse,
-// and, *if* the syntactic construct they handle is present, wrap
-// the AST node that the inner parser gave them in another node.
-
-// Parse a full expression. The optional arguments are used to
-// forbid the `in` operator (in for loops initalization expressions)
-// and provide reference for storing '=' operator inside shorthand
-// property assignment in contexts where both object expression
-// and object pattern might appear (so it's possible to raise
-// delayed syntax error at correct position).
-
-pp$3.parseExpression = function(noIn, refDestructuringErrors) {
- var this$1 = this;
-
- var startPos = this.start, startLoc = this.startLoc;
- var expr = this.parseMaybeAssign(noIn, refDestructuringErrors);
- if (this.type === types.comma) {
- var node = this.startNodeAt(startPos, startLoc);
- node.expressions = [expr];
- while (this.eat(types.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors)); }
- return this.finishNode(node, "SequenceExpression")
- }
- return expr
-};
-
-// Parse an assignment expression. This includes applications of
-// operators like `+=`.
-
-pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) {
- if (this.inGenerator && this.isContextual("yield")) { return this.parseYield() }
-
- var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1;
- if (refDestructuringErrors) {
- oldParenAssign = refDestructuringErrors.parenthesizedAssign;
- oldTrailingComma = refDestructuringErrors.trailingComma;
- refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1;
- } else {
- refDestructuringErrors = new DestructuringErrors;
- ownDestructuringErrors = true;
- }
-
- var startPos = this.start, startLoc = this.startLoc;
- if (this.type == types.parenL || this.type == types.name)
- { this.potentialArrowAt = this.start; }
- var left = this.parseMaybeConditional(noIn, refDestructuringErrors);
- if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); }
- if (this.type.isAssign) {
- var node = this.startNodeAt(startPos, startLoc);
- node.operator = this.value;
- node.left = this.type === types.eq ? this.toAssignable(left, false, refDestructuringErrors) : left;
- if (!ownDestructuringErrors) { DestructuringErrors.call(refDestructuringErrors); }
- refDestructuringErrors.shorthandAssign = -1; // reset because shorthand default was used correctly
- this.checkLVal(left);
- this.next();
- node.right = this.parseMaybeAssign(noIn);
- return this.finishNode(node, "AssignmentExpression")
- } else {
- if (ownDestructuringErrors) { this.checkExpressionErrors(refDestructuringErrors, true); }
- }
- if (oldParenAssign > -1) { refDestructuringErrors.parenthesizedAssign = oldParenAssign; }
- if (oldTrailingComma > -1) { refDestructuringErrors.trailingComma = oldTrailingComma; }
- return left
-};
-
-// Parse a ternary conditional (`?:`) operator.
-
-pp$3.parseMaybeConditional = function(noIn, refDestructuringErrors) {
- var startPos = this.start, startLoc = this.startLoc;
- var expr = this.parseExprOps(noIn, refDestructuringErrors);
- if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
- if (this.eat(types.question)) {
- var node = this.startNodeAt(startPos, startLoc);
- node.test = expr;
- node.consequent = this.parseMaybeAssign();
- this.expect(types.colon);
- node.alternate = this.parseMaybeAssign(noIn);
- return this.finishNode(node, "ConditionalExpression")
- }
- return expr
-};
-
-// Start the precedence parser.
-
-pp$3.parseExprOps = function(noIn, refDestructuringErrors) {
- var startPos = this.start, startLoc = this.startLoc;
- var expr = this.parseMaybeUnary(refDestructuringErrors, false);
- if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
- return expr.start == startPos && expr.type === "ArrowFunctionExpression" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, noIn)
-};
-
-// Parse binary operators with the operator precedence parsing
-// algorithm. `left` is the left-hand side of the operator.
-// `minPrec` provides context that allows the function to stop and
-// defer further parser to one of its callers when it encounters an
-// operator that has a lower precedence than the set it is parsing.
-
-pp$3.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) {
- var prec = this.type.binop;
- if (prec != null && (!noIn || this.type !== types._in)) {
- if (prec > minPrec) {
- var logical = this.type === types.logicalOR || this.type === types.logicalAND;
- var op = this.value;
- this.next();
- var startPos = this.start, startLoc = this.startLoc;
- var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn);
- var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical);
- return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn)
- }
- }
- return left
-};
-
-pp$3.buildBinary = function(startPos, startLoc, left, right, op, logical) {
- var node = this.startNodeAt(startPos, startLoc);
- node.left = left;
- node.operator = op;
- node.right = right;
- return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression")
-};
-
-// Parse unary operators, both prefix and postfix.
-
-pp$3.parseMaybeUnary = function(refDestructuringErrors, sawUnary) {
- var this$1 = this;
-
- var startPos = this.start, startLoc = this.startLoc, expr;
- if (this.inAsync && this.isContextual("await")) {
- expr = this.parseAwait();
- sawUnary = true;
- } else if (this.type.prefix) {
- var node = this.startNode(), update = this.type === types.incDec;
- node.operator = this.value;
- node.prefix = true;
- this.next();
- node.argument = this.parseMaybeUnary(null, true);
- this.checkExpressionErrors(refDestructuringErrors, true);
- if (update) { this.checkLVal(node.argument); }
- else if (this.strict && node.operator === "delete" &&
- node.argument.type === "Identifier")
- { this.raiseRecoverable(node.start, "Deleting local variable in strict mode"); }
- else { sawUnary = true; }
- expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
- } else {
- expr = this.parseExprSubscripts(refDestructuringErrors);
- if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
- while (this.type.postfix && !this.canInsertSemicolon()) {
- var node$1 = this$1.startNodeAt(startPos, startLoc);
- node$1.operator = this$1.value;
- node$1.prefix = false;
- node$1.argument = expr;
- this$1.checkLVal(expr);
- this$1.next();
- expr = this$1.finishNode(node$1, "UpdateExpression");
- }
- }
-
- if (!sawUnary && this.eat(types.starstar))
- { return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false) }
- else
- { return expr }
-};
-
-// Parse call, dot, and `[]`-subscript expressions.
-
-pp$3.parseExprSubscripts = function(refDestructuringErrors) {
- var startPos = this.start, startLoc = this.startLoc;
- var expr = this.parseExprAtom(refDestructuringErrors);
- var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")";
- if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) { return expr }
- var result = this.parseSubscripts(expr, startPos, startLoc);
- if (refDestructuringErrors && result.type === "MemberExpression") {
- if (refDestructuringErrors.parenthesizedAssign >= result.start) { refDestructuringErrors.parenthesizedAssign = -1; }
- if (refDestructuringErrors.parenthesizedBind >= result.start) { refDestructuringErrors.parenthesizedBind = -1; }
- }
- return result
-};
-
-pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) {
- var this$1 = this;
-
- var maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" &&
- this.lastTokEnd == base.end && !this.canInsertSemicolon() && this.input.slice(base.start, base.end) === "async";
- for (var computed = (void 0);;) {
- if ((computed = this$1.eat(types.bracketL)) || this$1.eat(types.dot)) {
- var node = this$1.startNodeAt(startPos, startLoc);
- node.object = base;
- node.property = computed ? this$1.parseExpression() : this$1.parseIdent(true);
- node.computed = !!computed;
- if (computed) { this$1.expect(types.bracketR); }
- base = this$1.finishNode(node, "MemberExpression");
- } else if (!noCalls && this$1.eat(types.parenL)) {
- var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this$1.yieldPos, oldAwaitPos = this$1.awaitPos;
- this$1.yieldPos = 0;
- this$1.awaitPos = 0;
- var exprList = this$1.parseExprList(types.parenR, this$1.options.ecmaVersion >= 8, false, refDestructuringErrors);
- if (maybeAsyncArrow && !this$1.canInsertSemicolon() && this$1.eat(types.arrow)) {
- this$1.checkPatternErrors(refDestructuringErrors, false);
- this$1.checkYieldAwaitInDefaultParams();
- this$1.yieldPos = oldYieldPos;
- this$1.awaitPos = oldAwaitPos;
- return this$1.parseArrowExpression(this$1.startNodeAt(startPos, startLoc), exprList, true)
- }
- this$1.checkExpressionErrors(refDestructuringErrors, true);
- this$1.yieldPos = oldYieldPos || this$1.yieldPos;
- this$1.awaitPos = oldAwaitPos || this$1.awaitPos;
- var node$1 = this$1.startNodeAt(startPos, startLoc);
- node$1.callee = base;
- node$1.arguments = exprList;
- base = this$1.finishNode(node$1, "CallExpression");
- } else if (this$1.type === types.backQuote) {
- var node$2 = this$1.startNodeAt(startPos, startLoc);
- node$2.tag = base;
- node$2.quasi = this$1.parseTemplate({isTagged: true});
- base = this$1.finishNode(node$2, "TaggedTemplateExpression");
- } else {
- return base
- }
- }
-};
-
-// Parse an atomic expression — either a single token that is an
-// expression, an expression started by a keyword like `function` or
-// `new`, or an expression wrapped in punctuation like `()`, `[]`,
-// or `{}`.
-
-pp$3.parseExprAtom = function(refDestructuringErrors) {
- var node, canBeArrow = this.potentialArrowAt == this.start;
- switch (this.type) {
- case types._super:
- if (!this.inFunction)
- { this.raise(this.start, "'super' outside of function or class"); }
- node = this.startNode();
- this.next();
- // The `super` keyword can appear at below:
- // SuperProperty:
- // super [ Expression ]
- // super . IdentifierName
- // SuperCall:
- // super Arguments
- if (this.type !== types.dot && this.type !== types.bracketL && this.type !== types.parenL)
- { this.unexpected(); }
- return this.finishNode(node, "Super")
-
- case types._this:
- node = this.startNode();
- this.next();
- return this.finishNode(node, "ThisExpression")
-
- case types.name:
- var startPos = this.start, startLoc = this.startLoc, containsEsc = this.containsEsc;
- var id = this.parseIdent(this.type !== types.name);
- if (this.options.ecmaVersion >= 8 && !containsEsc && id.name === "async" && !this.canInsertSemicolon() && this.eat(types._function))
- { return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true) }
- if (canBeArrow && !this.canInsertSemicolon()) {
- if (this.eat(types.arrow))
- { return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false) }
- if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === types.name && !containsEsc) {
- id = this.parseIdent();
- if (this.canInsertSemicolon() || !this.eat(types.arrow))
- { this.unexpected(); }
- return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true)
- }
- }
- return id
-
- case types.regexp:
- var value = this.value;
- node = this.parseLiteral(value.value);
- node.regex = {pattern: value.pattern, flags: value.flags};
- return node
-
- case types.num: case types.string:
- return this.parseLiteral(this.value)
-
- case types._null: case types._true: case types._false:
- node = this.startNode();
- node.value = this.type === types._null ? null : this.type === types._true;
- node.raw = this.type.keyword;
- this.next();
- return this.finishNode(node, "Literal")
-
- case types.parenL:
- var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow);
- if (refDestructuringErrors) {
- if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr))
- { refDestructuringErrors.parenthesizedAssign = start; }
- if (refDestructuringErrors.parenthesizedBind < 0)
- { refDestructuringErrors.parenthesizedBind = start; }
- }
- return expr
-
- case types.bracketL:
- node = this.startNode();
- this.next();
- node.elements = this.parseExprList(types.bracketR, true, true, refDestructuringErrors);
- return this.finishNode(node, "ArrayExpression")
-
- case types.braceL:
- return this.parseObj(false, refDestructuringErrors)
-
- case types._function:
- node = this.startNode();
- this.next();
- return this.parseFunction(node, false)
-
- case types._class:
- return this.parseClass(this.startNode(), false)
-
- case types._new:
- return this.parseNew()
-
- case types.backQuote:
- return this.parseTemplate()
-
- default:
- this.unexpected();
- }
-};
-
-pp$3.parseLiteral = function(value) {
- var node = this.startNode();
- node.value = value;
- node.raw = this.input.slice(this.start, this.end);
- this.next();
- return this.finishNode(node, "Literal")
-};
-
-pp$3.parseParenExpression = function() {
- this.expect(types.parenL);
- var val = this.parseExpression();
- this.expect(types.parenR);
- return val
-};
-
-pp$3.parseParenAndDistinguishExpression = function(canBeArrow) {
- var this$1 = this;
-
- var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8;
- if (this.options.ecmaVersion >= 6) {
- this.next();
-
- var innerStartPos = this.start, innerStartLoc = this.startLoc;
- var exprList = [], first = true, lastIsComma = false;
- var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart;
- this.yieldPos = 0;
- this.awaitPos = 0;
- while (this.type !== types.parenR) {
- first ? first = false : this$1.expect(types.comma);
- if (allowTrailingComma && this$1.afterTrailingComma(types.parenR, true)) {
- lastIsComma = true;
- break
- } else if (this$1.type === types.ellipsis) {
- spreadStart = this$1.start;
- exprList.push(this$1.parseParenItem(this$1.parseRestBinding()));
- if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); }
- break
- } else {
- exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem));
- }
- }
- var innerEndPos = this.start, innerEndLoc = this.startLoc;
- this.expect(types.parenR);
-
- if (canBeArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) {
- this.checkPatternErrors(refDestructuringErrors, false);
- this.checkYieldAwaitInDefaultParams();
- this.yieldPos = oldYieldPos;
- this.awaitPos = oldAwaitPos;
- return this.parseParenArrowList(startPos, startLoc, exprList)
- }
-
- if (!exprList.length || lastIsComma) { this.unexpected(this.lastTokStart); }
- if (spreadStart) { this.unexpected(spreadStart); }
- this.checkExpressionErrors(refDestructuringErrors, true);
- this.yieldPos = oldYieldPos || this.yieldPos;
- this.awaitPos = oldAwaitPos || this.awaitPos;
-
- if (exprList.length > 1) {
- val = this.startNodeAt(innerStartPos, innerStartLoc);
- val.expressions = exprList;
- this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
- } else {
- val = exprList[0];
- }
- } else {
- val = this.parseParenExpression();
- }
-
- if (this.options.preserveParens) {
- var par = this.startNodeAt(startPos, startLoc);
- par.expression = val;
- return this.finishNode(par, "ParenthesizedExpression")
- } else {
- return val
- }
-};
-
-pp$3.parseParenItem = function(item) {
- return item
-};
-
-pp$3.parseParenArrowList = function(startPos, startLoc, exprList) {
- return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList)
-};
-
-// New's precedence is slightly tricky. It must allow its argument to
-// be a `[]` or dot subscript expression, but not a call — at least,
-// not without wrapping it in parentheses. Thus, it uses the noCalls
-// argument to parseSubscripts to prevent it from consuming the
-// argument list.
-
-var empty$1 = [];
-
-pp$3.parseNew = function() {
- var node = this.startNode();
- var meta = this.parseIdent(true);
- if (this.options.ecmaVersion >= 6 && this.eat(types.dot)) {
- node.meta = meta;
- var containsEsc = this.containsEsc;
- node.property = this.parseIdent(true);
- if (node.property.name !== "target" || containsEsc)
- { this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target"); }
- if (!this.inFunction)
- { this.raiseRecoverable(node.start, "new.target can only be used in functions"); }
- return this.finishNode(node, "MetaProperty")
- }
- var startPos = this.start, startLoc = this.startLoc;
- node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
- if (this.eat(types.parenL)) { node.arguments = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false); }
- else { node.arguments = empty$1; }
- return this.finishNode(node, "NewExpression")
-};
-
-// Parse template expression.
-
-pp$3.parseTemplateElement = function(ref) {
- var isTagged = ref.isTagged;
-
- var elem = this.startNode();
- if (this.type === types.invalidTemplate) {
- if (!isTagged) {
- this.raiseRecoverable(this.start, "Bad escape sequence in untagged template literal");
- }
- elem.value = {
- raw: this.value,
- cooked: null
- };
- } else {
- elem.value = {
- raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"),
- cooked: this.value
- };
- }
- this.next();
- elem.tail = this.type === types.backQuote;
- return this.finishNode(elem, "TemplateElement")
-};
-
-pp$3.parseTemplate = function(ref) {
- var this$1 = this;
- if ( ref === void 0 ) ref = {};
- var isTagged = ref.isTagged; if ( isTagged === void 0 ) isTagged = false;
-
- var node = this.startNode();
- this.next();
- node.expressions = [];
- var curElt = this.parseTemplateElement({isTagged: isTagged});
- node.quasis = [curElt];
- while (!curElt.tail) {
- this$1.expect(types.dollarBraceL);
- node.expressions.push(this$1.parseExpression());
- this$1.expect(types.braceR);
- node.quasis.push(curElt = this$1.parseTemplateElement({isTagged: isTagged}));
- }
- this.next();
- return this.finishNode(node, "TemplateLiteral")
-};
-
-pp$3.isAsyncProp = function(prop) {
- return !prop.computed && prop.key.type === "Identifier" && prop.key.name === "async" &&
- (this.type === types.name || this.type === types.num || this.type === types.string || this.type === types.bracketL || this.type.keyword || (this.options.ecmaVersion >= 9 && this.type === types.star)) &&
- !lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
-};
-
-// Parse an object literal or binding pattern.
-
-pp$3.parseObj = function(isPattern, refDestructuringErrors) {
- var this$1 = this;
-
- var node = this.startNode(), first = true, propHash = {};
- node.properties = [];
- this.next();
- while (!this.eat(types.braceR)) {
- if (!first) {
- this$1.expect(types.comma);
- if (this$1.afterTrailingComma(types.braceR)) { break }
- } else { first = false; }
-
- var prop = this$1.parseProperty(isPattern, refDestructuringErrors);
- if (!isPattern) { this$1.checkPropClash(prop, propHash, refDestructuringErrors); }
- node.properties.push(prop);
- }
- return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
-};
-
-pp$3.parseProperty = function(isPattern, refDestructuringErrors) {
- var prop = this.startNode(), isGenerator, isAsync, startPos, startLoc;
- if (this.options.ecmaVersion >= 9 && this.eat(types.ellipsis)) {
- if (isPattern) {
- prop.argument = this.parseIdent(false);
- if (this.type === types.comma) {
- this.raise(this.start, "Comma is not permitted after the rest element");
- }
- return this.finishNode(prop, "RestElement")
- }
- // To disallow parenthesized identifier via `this.toAssignable()`.
- if (this.type === types.parenL && refDestructuringErrors) {
- if (refDestructuringErrors.parenthesizedAssign < 0) {
- refDestructuringErrors.parenthesizedAssign = this.start;
- }
- if (refDestructuringErrors.parenthesizedBind < 0) {
- refDestructuringErrors.parenthesizedBind = this.start;
- }
- }
- // Parse argument.
- prop.argument = this.parseMaybeAssign(false, refDestructuringErrors);
- // To disallow trailing comma via `this.toAssignable()`.
- if (this.type === types.comma && refDestructuringErrors && refDestructuringErrors.trailingComma < 0) {
- refDestructuringErrors.trailingComma = this.start;
- }
- // Finish
- return this.finishNode(prop, "SpreadElement")
- }
- if (this.options.ecmaVersion >= 6) {
- prop.method = false;
- prop.shorthand = false;
- if (isPattern || refDestructuringErrors) {
- startPos = this.start;
- startLoc = this.startLoc;
- }
- if (!isPattern)
- { isGenerator = this.eat(types.star); }
- }
- var containsEsc = this.containsEsc;
- this.parsePropertyName(prop);
- if (!isPattern && !containsEsc && this.options.ecmaVersion >= 8 && !isGenerator && this.isAsyncProp(prop)) {
- isAsync = true;
- isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star);
- this.parsePropertyName(prop, refDestructuringErrors);
- } else {
- isAsync = false;
- }
- this.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc);
- return this.finishNode(prop, "Property")
-};
-
-pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc) {
- if ((isGenerator || isAsync) && this.type === types.colon)
- { this.unexpected(); }
-
- if (this.eat(types.colon)) {
- prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors);
- prop.kind = "init";
- } else if (this.options.ecmaVersion >= 6 && this.type === types.parenL) {
- if (isPattern) { this.unexpected(); }
- prop.kind = "init";
- prop.method = true;
- prop.value = this.parseMethod(isGenerator, isAsync);
- } else if (!isPattern && !containsEsc &&
- this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
- (prop.key.name === "get" || prop.key.name === "set") &&
- (this.type != types.comma && this.type != types.braceR)) {
- if (isGenerator || isAsync) { this.unexpected(); }
- prop.kind = prop.key.name;
- this.parsePropertyName(prop);
- prop.value = this.parseMethod(false);
- var paramCount = prop.kind === "get" ? 0 : 1;
- if (prop.value.params.length !== paramCount) {
- var start = prop.value.start;
- if (prop.kind === "get")
- { this.raiseRecoverable(start, "getter should have no params"); }
- else
- { this.raiseRecoverable(start, "setter should have exactly one param"); }
- } else {
- if (prop.kind === "set" && prop.value.params[0].type === "RestElement")
- { this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params"); }
- }
- } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
- this.checkUnreserved(prop.key);
- prop.kind = "init";
- if (isPattern) {
- prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
- } else if (this.type === types.eq && refDestructuringErrors) {
- if (refDestructuringErrors.shorthandAssign < 0)
- { refDestructuringErrors.shorthandAssign = this.start; }
- prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
- } else {
- prop.value = prop.key;
- }
- prop.shorthand = true;
- } else { this.unexpected(); }
-};
-
-pp$3.parsePropertyName = function(prop) {
- if (this.options.ecmaVersion >= 6) {
- if (this.eat(types.bracketL)) {
- prop.computed = true;
- prop.key = this.parseMaybeAssign();
- this.expect(types.bracketR);
- return prop.key
- } else {
- prop.computed = false;
- }
- }
- return prop.key = this.type === types.num || this.type === types.string ? this.parseExprAtom() : this.parseIdent(true)
-};
-
-// Initialize empty function node.
-
-pp$3.initFunction = function(node) {
- node.id = null;
- if (this.options.ecmaVersion >= 6) {
- node.generator = false;
- node.expression = false;
- }
- if (this.options.ecmaVersion >= 8)
- { node.async = false; }
-};
-
-// Parse object or class method.
-
-pp$3.parseMethod = function(isGenerator, isAsync) {
- var node = this.startNode(), oldInGen = this.inGenerator, oldInAsync = this.inAsync,
- oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
-
- this.initFunction(node);
- if (this.options.ecmaVersion >= 6)
- { node.generator = isGenerator; }
- if (this.options.ecmaVersion >= 8)
- { node.async = !!isAsync; }
-
- this.inGenerator = node.generator;
- this.inAsync = node.async;
- this.yieldPos = 0;
- this.awaitPos = 0;
- this.inFunction = true;
- this.enterFunctionScope();
-
- this.expect(types.parenL);
- node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
- this.checkYieldAwaitInDefaultParams();
- this.parseFunctionBody(node, false);
-
- this.inGenerator = oldInGen;
- this.inAsync = oldInAsync;
- this.yieldPos = oldYieldPos;
- this.awaitPos = oldAwaitPos;
- this.inFunction = oldInFunc;
- return this.finishNode(node, "FunctionExpression")
-};
-
-// Parse arrow function expression with given parameters.
-
-pp$3.parseArrowExpression = function(node, params, isAsync) {
- var oldInGen = this.inGenerator, oldInAsync = this.inAsync,
- oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
-
- this.enterFunctionScope();
- this.initFunction(node);
- if (this.options.ecmaVersion >= 8)
- { node.async = !!isAsync; }
-
- this.inGenerator = false;
- this.inAsync = node.async;
- this.yieldPos = 0;
- this.awaitPos = 0;
- this.inFunction = true;
-
- node.params = this.toAssignableList(params, true);
- this.parseFunctionBody(node, true);
-
- this.inGenerator = oldInGen;
- this.inAsync = oldInAsync;
- this.yieldPos = oldYieldPos;
- this.awaitPos = oldAwaitPos;
- this.inFunction = oldInFunc;
- return this.finishNode(node, "ArrowFunctionExpression")
-};
-
-// Parse function body and check parameters.
-
-pp$3.parseFunctionBody = function(node, isArrowFunction) {
- var isExpression = isArrowFunction && this.type !== types.braceL;
- var oldStrict = this.strict, useStrict = false;
-
- if (isExpression) {
- node.body = this.parseMaybeAssign();
- node.expression = true;
- this.checkParams(node, false);
- } else {
- var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params);
- if (!oldStrict || nonSimple) {
- useStrict = this.strictDirective(this.end);
- // If this is a strict mode function, verify that argument names
- // are not repeated, and it does not try to bind the words `eval`
- // or `arguments`.
- if (useStrict && nonSimple)
- { this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list"); }
- }
- // Start a new scope with regard to labels and the `inFunction`
- // flag (restore them to their old value afterwards).
- var oldLabels = this.labels;
- this.labels = [];
- if (useStrict) { this.strict = true; }
-
- // Add the params to varDeclaredNames to ensure that an error is thrown
- // if a let/const declaration in the function clashes with one of the params.
- this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && this.isSimpleParamList(node.params));
- node.body = this.parseBlock(false);
- node.expression = false;
- this.adaptDirectivePrologue(node.body.body);
- this.labels = oldLabels;
- }
- this.exitFunctionScope();
-
- if (this.strict && node.id) {
- // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval'
- this.checkLVal(node.id, "none");
- }
- this.strict = oldStrict;
-};
-
-pp$3.isSimpleParamList = function(params) {
- for (var i = 0, list = params; i < list.length; i += 1)
- {
- var param = list[i];
-
- if (param.type !== "Identifier") { return false
- } }
- return true
-};
-
-// Checks function params for various disallowed patterns such as using "eval"
-// or "arguments" and duplicate parameters.
-
-pp$3.checkParams = function(node, allowDuplicates) {
- var this$1 = this;
-
- var nameHash = {};
- for (var i = 0, list = node.params; i < list.length; i += 1)
- {
- var param = list[i];
-
- this$1.checkLVal(param, "var", allowDuplicates ? null : nameHash);
- }
-};
-
-// Parses a comma-separated list of expressions, and returns them as
-// an array. `close` is the token type that ends the list, and
-// `allowEmpty` can be turned on to allow subsequent commas with
-// nothing in between them to be parsed as `null` (which is needed
-// for array literals).
-
-pp$3.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) {
- var this$1 = this;
-
- var elts = [], first = true;
- while (!this.eat(close)) {
- if (!first) {
- this$1.expect(types.comma);
- if (allowTrailingComma && this$1.afterTrailingComma(close)) { break }
- } else { first = false; }
-
- var elt = (void 0);
- if (allowEmpty && this$1.type === types.comma)
- { elt = null; }
- else if (this$1.type === types.ellipsis) {
- elt = this$1.parseSpread(refDestructuringErrors);
- if (refDestructuringErrors && this$1.type === types.comma && refDestructuringErrors.trailingComma < 0)
- { refDestructuringErrors.trailingComma = this$1.start; }
- } else {
- elt = this$1.parseMaybeAssign(false, refDestructuringErrors);
- }
- elts.push(elt);
- }
- return elts
-};
-
-pp$3.checkUnreserved = function(ref) {
- var start = ref.start;
- var end = ref.end;
- var name = ref.name;
-
- if (this.inGenerator && name === "yield")
- { this.raiseRecoverable(start, "Can not use 'yield' as identifier inside a generator"); }
- if (this.inAsync && name === "await")
- { this.raiseRecoverable(start, "Can not use 'await' as identifier inside an async function"); }
- if (this.isKeyword(name))
- { this.raise(start, ("Unexpected keyword '" + name + "'")); }
- if (this.options.ecmaVersion < 6 &&
- this.input.slice(start, end).indexOf("\\") != -1) { return }
- var re = this.strict ? this.reservedWordsStrict : this.reservedWords;
- if (re.test(name)) {
- if (!this.inAsync && name === "await")
- { this.raiseRecoverable(start, "Can not use keyword 'await' outside an async function"); }
- this.raiseRecoverable(start, ("The keyword '" + name + "' is reserved"));
- }
-};
-
-// Parse the next token as an identifier. If `liberal` is true (used
-// when parsing properties), it will also convert keywords into
-// identifiers.
-
-pp$3.parseIdent = function(liberal, isBinding) {
- var node = this.startNode();
- if (liberal && this.options.allowReserved == "never") { liberal = false; }
- if (this.type === types.name) {
- node.name = this.value;
- } else if (this.type.keyword) {
- node.name = this.type.keyword;
-
- // To fix https://github.com/acornjs/acorn/issues/575
- // `class` and `function` keywords push new context into this.context.
- // But there is no chance to pop the context if the keyword is consumed as an identifier such as a property name.
- // If the previous token is a dot, this does not apply because the context-managing code already ignored the keyword
- if ((node.name === "class" || node.name === "function") &&
- (this.lastTokEnd !== this.lastTokStart + 1 || this.input.charCodeAt(this.lastTokStart) !== 46)) {
- this.context.pop();
- }
- } else {
- this.unexpected();
- }
- this.next();
- this.finishNode(node, "Identifier");
- if (!liberal) { this.checkUnreserved(node); }
- return node
-};
-
-// Parses yield expression inside generator.
-
-pp$3.parseYield = function() {
- if (!this.yieldPos) { this.yieldPos = this.start; }
-
- var node = this.startNode();
- this.next();
- if (this.type == types.semi || this.canInsertSemicolon() || (this.type != types.star && !this.type.startsExpr)) {
- node.delegate = false;
- node.argument = null;
- } else {
- node.delegate = this.eat(types.star);
- node.argument = this.parseMaybeAssign();
- }
- return this.finishNode(node, "YieldExpression")
-};
-
-pp$3.parseAwait = function() {
- if (!this.awaitPos) { this.awaitPos = this.start; }
-
- var node = this.startNode();
- this.next();
- node.argument = this.parseMaybeUnary(null, true);
- return this.finishNode(node, "AwaitExpression")
-};
-
-var pp$4 = Parser.prototype;
-
-// This function is used to raise exceptions on parse errors. It
-// takes an offset integer (into the current `input`) to indicate
-// the location of the error, attaches the position to the end
-// of the error message, and then raises a `SyntaxError` with that
-// message.
-
-pp$4.raise = function(pos, message) {
- var loc = getLineInfo(this.input, pos);
- message += " (" + loc.line + ":" + loc.column + ")";
- var err = new SyntaxError(message);
- err.pos = pos; err.loc = loc; err.raisedAt = this.pos;
- throw err
-};
-
-pp$4.raiseRecoverable = pp$4.raise;
-
-pp$4.curPosition = function() {
- if (this.options.locations) {
- return new Position(this.curLine, this.pos - this.lineStart)
- }
-};
-
-var pp$5 = Parser.prototype;
-
-// Object.assign polyfill
-var assign = Object.assign || function(target) {
- var sources = [], len = arguments.length - 1;
- while ( len-- > 0 ) sources[ len ] = arguments[ len + 1 ];
-
- for (var i = 0, list = sources; i < list.length; i += 1) {
- var source = list[i];
-
- for (var key in source) {
- if (has(source, key)) {
- target[key] = source[key];
- }
- }
- }
- return target
-};
-
-// The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names.
-
-pp$5.enterFunctionScope = function() {
- // var: a hash of var-declared names in the current lexical scope
- // lexical: a hash of lexically-declared names in the current lexical scope
- // childVar: a hash of var-declared names in all child lexical scopes of the current lexical scope (within the current function scope)
- // parentLexical: a hash of lexically-declared names in all parent lexical scopes of the current lexical scope (within the current function scope)
- this.scopeStack.push({var: {}, lexical: {}, childVar: {}, parentLexical: {}});
-};
-
-pp$5.exitFunctionScope = function() {
- this.scopeStack.pop();
-};
-
-pp$5.enterLexicalScope = function() {
- var parentScope = this.scopeStack[this.scopeStack.length - 1];
- var childScope = {var: {}, lexical: {}, childVar: {}, parentLexical: {}};
-
- this.scopeStack.push(childScope);
- assign(childScope.parentLexical, parentScope.lexical, parentScope.parentLexical);
-};
-
-pp$5.exitLexicalScope = function() {
- var childScope = this.scopeStack.pop();
- var parentScope = this.scopeStack[this.scopeStack.length - 1];
-
- assign(parentScope.childVar, childScope.var, childScope.childVar);
-};
-
-/**
- * A name can be declared with `var` if there are no variables with the same name declared with `let`/`const`
- * in the current lexical scope or any of the parent lexical scopes in this function.
- */
-pp$5.canDeclareVarName = function(name) {
- var currentScope = this.scopeStack[this.scopeStack.length - 1];
-
- return !has(currentScope.lexical, name) && !has(currentScope.parentLexical, name)
-};
-
-/**
- * A name can be declared with `let`/`const` if there are no variables with the same name declared with `let`/`const`
- * in the current scope, and there are no variables with the same name declared with `var` in the current scope or in
- * any child lexical scopes in this function.
- */
-pp$5.canDeclareLexicalName = function(name) {
- var currentScope = this.scopeStack[this.scopeStack.length - 1];
-
- return !has(currentScope.lexical, name) && !has(currentScope.var, name) && !has(currentScope.childVar, name)
-};
-
-pp$5.declareVarName = function(name) {
- this.scopeStack[this.scopeStack.length - 1].var[name] = true;
-};
-
-pp$5.declareLexicalName = function(name) {
- this.scopeStack[this.scopeStack.length - 1].lexical[name] = true;
-};
-
-var Node = function Node(parser, pos, loc) {
- this.type = "";
- this.start = pos;
- this.end = 0;
- if (parser.options.locations)
- { this.loc = new SourceLocation(parser, loc); }
- if (parser.options.directSourceFile)
- { this.sourceFile = parser.options.directSourceFile; }
- if (parser.options.ranges)
- { this.range = [pos, 0]; }
-};
-
-// Start an AST node, attaching a start offset.
-
-var pp$6 = Parser.prototype;
-
-pp$6.startNode = function() {
- return new Node(this, this.start, this.startLoc)
-};
-
-pp$6.startNodeAt = function(pos, loc) {
- return new Node(this, pos, loc)
-};
-
-// Finish an AST node, adding `type` and `end` properties.
-
-function finishNodeAt(node, type, pos, loc) {
- node.type = type;
- node.end = pos;
- if (this.options.locations)
- { node.loc.end = loc; }
- if (this.options.ranges)
- { node.range[1] = pos; }
- return node
-}
-
-pp$6.finishNode = function(node, type) {
- return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)
-};
-
-// Finish node at given position
-
-pp$6.finishNodeAt = function(node, type, pos, loc) {
- return finishNodeAt.call(this, node, type, pos, loc)
-};
-
-// The algorithm used to determine whether a regexp can appear at a
-// given point in the program is loosely based on sweet.js' approach.
-// See https://github.com/mozilla/sweet.js/wiki/design
-
-var TokContext = function TokContext(token, isExpr, preserveSpace, override, generator) {
- this.token = token;
- this.isExpr = !!isExpr;
- this.preserveSpace = !!preserveSpace;
- this.override = override;
- this.generator = !!generator;
-};
-
-var types$1 = {
- b_stat: new TokContext("{", false),
- b_expr: new TokContext("{", true),
- b_tmpl: new TokContext("${", false),
- p_stat: new TokContext("(", false),
- p_expr: new TokContext("(", true),
- q_tmpl: new TokContext("`", true, true, function (p) { return p.tryReadTemplateToken(); }),
- f_stat: new TokContext("function", false),
- f_expr: new TokContext("function", true),
- f_expr_gen: new TokContext("function", true, false, null, true),
- f_gen: new TokContext("function", false, false, null, true)
-};
-
-var pp$7 = Parser.prototype;
-
-pp$7.initialContext = function() {
- return [types$1.b_stat]
-};
-
-pp$7.braceIsBlock = function(prevType) {
- var parent = this.curContext();
- if (parent === types$1.f_expr || parent === types$1.f_stat)
- { return true }
- if (prevType === types.colon && (parent === types$1.b_stat || parent === types$1.b_expr))
- { return !parent.isExpr }
-
- // The check for `tt.name && exprAllowed` detects whether we are
- // after a `yield` or `of` construct. See the `updateContext` for
- // `tt.name`.
- if (prevType === types._return || prevType == types.name && this.exprAllowed)
- { return lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) }
- if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR || prevType == types.arrow)
- { return true }
- if (prevType == types.braceL)
- { return parent === types$1.b_stat }
- if (prevType == types._var || prevType == types.name)
- { return false }
- return !this.exprAllowed
-};
-
-pp$7.inGeneratorContext = function() {
- var this$1 = this;
-
- for (var i = this.context.length - 1; i >= 1; i--) {
- var context = this$1.context[i];
- if (context.token === "function")
- { return context.generator }
- }
- return false
-};
-
-pp$7.updateContext = function(prevType) {
- var update, type = this.type;
- if (type.keyword && prevType == types.dot)
- { this.exprAllowed = false; }
- else if (update = type.updateContext)
- { update.call(this, prevType); }
- else
- { this.exprAllowed = type.beforeExpr; }
-};
-
-// Token-specific context update code
-
-types.parenR.updateContext = types.braceR.updateContext = function() {
- if (this.context.length == 1) {
- this.exprAllowed = true;
- return
- }
- var out = this.context.pop();
- if (out === types$1.b_stat && this.curContext().token === "function") {
- out = this.context.pop();
- }
- this.exprAllowed = !out.isExpr;
-};
-
-types.braceL.updateContext = function(prevType) {
- this.context.push(this.braceIsBlock(prevType) ? types$1.b_stat : types$1.b_expr);
- this.exprAllowed = true;
-};
-
-types.dollarBraceL.updateContext = function() {
- this.context.push(types$1.b_tmpl);
- this.exprAllowed = true;
-};
-
-types.parenL.updateContext = function(prevType) {
- var statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while;
- this.context.push(statementParens ? types$1.p_stat : types$1.p_expr);
- this.exprAllowed = true;
-};
-
-types.incDec.updateContext = function() {
- // tokExprAllowed stays unchanged
-};
-
-types._function.updateContext = types._class.updateContext = function(prevType) {
- if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else &&
- !((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat))
- { this.context.push(types$1.f_expr); }
- else
- { this.context.push(types$1.f_stat); }
- this.exprAllowed = false;
-};
-
-types.backQuote.updateContext = function() {
- if (this.curContext() === types$1.q_tmpl)
- { this.context.pop(); }
- else
- { this.context.push(types$1.q_tmpl); }
- this.exprAllowed = false;
-};
-
-types.star.updateContext = function(prevType) {
- if (prevType == types._function) {
- var index = this.context.length - 1;
- if (this.context[index] === types$1.f_expr)
- { this.context[index] = types$1.f_expr_gen; }
- else
- { this.context[index] = types$1.f_gen; }
- }
- this.exprAllowed = true;
-};
-
-types.name.updateContext = function(prevType) {
- var allowed = false;
- if (this.options.ecmaVersion >= 6) {
- if (this.value == "of" && !this.exprAllowed ||
- this.value == "yield" && this.inGeneratorContext())
- { allowed = true; }
- }
- this.exprAllowed = allowed;
-};
-
-// Object type used to represent tokens. Note that normally, tokens
-// simply exist as properties on the parser object. This is only
-// used for the onToken callback and the external tokenizer.
-
-var Token = function Token(p) {
- this.type = p.type;
- this.value = p.value;
- this.start = p.start;
- this.end = p.end;
- if (p.options.locations)
- { this.loc = new SourceLocation(p, p.startLoc, p.endLoc); }
- if (p.options.ranges)
- { this.range = [p.start, p.end]; }
-};
-
-// ## Tokenizer
-
-var pp$8 = Parser.prototype;
-
-// Are we running under Rhino?
-var isRhino = typeof Packages == "object" && Object.prototype.toString.call(Packages) == "[object JavaPackage]";
-
-// Move to the next token
-
-pp$8.next = function() {
- if (this.options.onToken)
- { this.options.onToken(new Token(this)); }
-
- this.lastTokEnd = this.end;
- this.lastTokStart = this.start;
- this.lastTokEndLoc = this.endLoc;
- this.lastTokStartLoc = this.startLoc;
- this.nextToken();
-};
-
-pp$8.getToken = function() {
- this.next();
- return new Token(this)
-};
-
-// If we're in an ES6 environment, make parsers iterable
-if (typeof Symbol !== "undefined")
- { pp$8[Symbol.iterator] = function() {
- var this$1 = this;
-
- return {
- next: function () {
- var token = this$1.getToken();
- return {
- done: token.type === types.eof,
- value: token
- }
- }
- }
- }; }
-
-// Toggle strict mode. Re-reads the next number or string to please
-// pedantic tests (`"use strict"; 010;` should fail).
-
-pp$8.curContext = function() {
- return this.context[this.context.length - 1]
-};
-
-// Read a single token, updating the parser object's token-related
-// properties.
-
-pp$8.nextToken = function() {
- var curContext = this.curContext();
- if (!curContext || !curContext.preserveSpace) { this.skipSpace(); }
-
- this.start = this.pos;
- if (this.options.locations) { this.startLoc = this.curPosition(); }
- if (this.pos >= this.input.length) { return this.finishToken(types.eof) }
-
- if (curContext.override) { return curContext.override(this) }
- else { this.readToken(this.fullCharCodeAtPos()); }
-};
-
-pp$8.readToken = function(code) {
- // Identifier or keyword. '\uXXXX' sequences are allowed in
- // identifiers, so '\' also dispatches to that.
- if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */)
- { return this.readWord() }
-
- return this.getTokenFromCode(code)
-};
-
-pp$8.fullCharCodeAtPos = function() {
- var code = this.input.charCodeAt(this.pos);
- if (code <= 0xd7ff || code >= 0xe000) { return code }
- var next = this.input.charCodeAt(this.pos + 1);
- return (code << 10) + next - 0x35fdc00
-};
-
-pp$8.skipBlockComment = function() {
- var this$1 = this;
-
- var startLoc = this.options.onComment && this.curPosition();
- var start = this.pos, end = this.input.indexOf("*/", this.pos += 2);
- if (end === -1) { this.raise(this.pos - 2, "Unterminated comment"); }
- this.pos = end + 2;
- if (this.options.locations) {
- lineBreakG.lastIndex = start;
- var match;
- while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
- ++this$1.curLine;
- this$1.lineStart = match.index + match[0].length;
- }
- }
- if (this.options.onComment)
- { this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
- startLoc, this.curPosition()); }
-};
-
-pp$8.skipLineComment = function(startSkip) {
- var this$1 = this;
-
- var start = this.pos;
- var startLoc = this.options.onComment && this.curPosition();
- var ch = this.input.charCodeAt(this.pos += startSkip);
- while (this.pos < this.input.length && !isNewLine(ch)) {
- ch = this$1.input.charCodeAt(++this$1.pos);
- }
- if (this.options.onComment)
- { this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
- startLoc, this.curPosition()); }
-};
-
-// Called at the start of the parse and after every token. Skips
-// whitespace and comments, and.
-
-pp$8.skipSpace = function() {
- var this$1 = this;
-
- loop: while (this.pos < this.input.length) {
- var ch = this$1.input.charCodeAt(this$1.pos);
- switch (ch) {
- case 32: case 160: // ' '
- ++this$1.pos;
- break
- case 13:
- if (this$1.input.charCodeAt(this$1.pos + 1) === 10) {
- ++this$1.pos;
- }
- case 10: case 8232: case 8233:
- ++this$1.pos;
- if (this$1.options.locations) {
- ++this$1.curLine;
- this$1.lineStart = this$1.pos;
- }
- break
- case 47: // '/'
- switch (this$1.input.charCodeAt(this$1.pos + 1)) {
- case 42: // '*'
- this$1.skipBlockComment();
- break
- case 47:
- this$1.skipLineComment(2);
- break
- default:
- break loop
- }
- break
- default:
- if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {
- ++this$1.pos;
- } else {
- break loop
- }
- }
- }
-};
-
-// Called at the end of every token. Sets `end`, `val`, and
-// maintains `context` and `exprAllowed`, and skips the space after
-// the token, so that the next one's `start` will point at the
-// right position.
-
-pp$8.finishToken = function(type, val) {
- this.end = this.pos;
- if (this.options.locations) { this.endLoc = this.curPosition(); }
- var prevType = this.type;
- this.type = type;
- this.value = val;
-
- this.updateContext(prevType);
-};
-
-// ### Token reading
-
-// This is the function that is called to fetch the next token. It
-// is somewhat obscure, because it works in character codes rather
-// than characters, and because operator parsing has been inlined
-// into it.
-//
-// All in the name of speed.
-//
-pp$8.readToken_dot = function() {
- var next = this.input.charCodeAt(this.pos + 1);
- if (next >= 48 && next <= 57) { return this.readNumber(true) }
- var next2 = this.input.charCodeAt(this.pos + 2);
- if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'
- this.pos += 3;
- return this.finishToken(types.ellipsis)
- } else {
- ++this.pos;
- return this.finishToken(types.dot)
- }
-};
-
-pp$8.readToken_slash = function() { // '/'
- var next = this.input.charCodeAt(this.pos + 1);
- if (this.exprAllowed) { ++this.pos; return this.readRegexp() }
- if (next === 61) { return this.finishOp(types.assign, 2) }
- return this.finishOp(types.slash, 1)
-};
-
-pp$8.readToken_mult_modulo_exp = function(code) { // '%*'
- var next = this.input.charCodeAt(this.pos + 1);
- var size = 1;
- var tokentype = code === 42 ? types.star : types.modulo;
-
- // exponentiation operator ** and **=
- if (this.options.ecmaVersion >= 7 && code == 42 && next === 42) {
- ++size;
- tokentype = types.starstar;
- next = this.input.charCodeAt(this.pos + 2);
- }
-
- if (next === 61) { return this.finishOp(types.assign, size + 1) }
- return this.finishOp(tokentype, size)
-};
-
-pp$8.readToken_pipe_amp = function(code) { // '|&'
- var next = this.input.charCodeAt(this.pos + 1);
- if (next === code) { return this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2) }
- if (next === 61) { return this.finishOp(types.assign, 2) }
- return this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1)
-};
-
-pp$8.readToken_caret = function() { // '^'
- var next = this.input.charCodeAt(this.pos + 1);
- if (next === 61) { return this.finishOp(types.assign, 2) }
- return this.finishOp(types.bitwiseXOR, 1)
-};
-
-pp$8.readToken_plus_min = function(code) { // '+-'
- var next = this.input.charCodeAt(this.pos + 1);
- if (next === code) {
- if (next == 45 && !this.inModule && this.input.charCodeAt(this.pos + 2) == 62 &&
- (this.lastTokEnd === 0 || lineBreak.test(this.input.slice(this.lastTokEnd, this.pos)))) {
- // A `-->` line comment
- this.skipLineComment(3);
- this.skipSpace();
- return this.nextToken()
- }
- return this.finishOp(types.incDec, 2)
- }
- if (next === 61) { return this.finishOp(types.assign, 2) }
- return this.finishOp(types.plusMin, 1)
-};
-
-pp$8.readToken_lt_gt = function(code) { // '<>'
- var next = this.input.charCodeAt(this.pos + 1);
- var size = 1;
- if (next === code) {
- size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2;
- if (this.input.charCodeAt(this.pos + size) === 61) { return this.finishOp(types.assign, size + 1) }
- return this.finishOp(types.bitShift, size)
- }
- if (next == 33 && code == 60 && !this.inModule && this.input.charCodeAt(this.pos + 2) == 45 &&
- this.input.charCodeAt(this.pos + 3) == 45) {
- // `