Current File : //lib/node_modules/npm/node_modules/es-abstract/es2015.js
'use strict';
var has = require('has');
var toPrimitive = require('es-to-primitive/es6');
var GetIntrinsic = require('./GetIntrinsic');
var $TypeError = GetIntrinsic('%TypeError%');
var $SyntaxError = GetIntrinsic('%SyntaxError%');
var $Array = GetIntrinsic('%Array%');
var $String = GetIntrinsic('%String%');
var $Object = GetIntrinsic('%Object%');
var $Number = GetIntrinsic('%Number%');
var $Symbol = GetIntrinsic('%Symbol%', true);
var $RegExp = GetIntrinsic('%RegExp%');
var hasSymbols = !!$Symbol;
var $isNaN = require('./helpers/isNaN');
var $isFinite = require('./helpers/isFinite');
var MAX_SAFE_INTEGER = $Number.MAX_SAFE_INTEGER || Math.pow(2, 53) - 1;
var assign = require('./helpers/assign');
var sign = require('./helpers/sign');
var mod = require('./helpers/mod');
var isPrimitive = require('./helpers/isPrimitive');
var parseInteger = parseInt;
var bind = require('function-bind');
var arraySlice = bind.call(Function.call, $Array.prototype.slice);
var strSlice = bind.call(Function.call, $String.prototype.slice);
var isBinary = bind.call(Function.call, $RegExp.prototype.test, /^0b[01]+$/i);
var isOctal = bind.call(Function.call, $RegExp.prototype.test, /^0o[0-7]+$/i);
var regexExec = bind.call(Function.call, $RegExp.prototype.exec);
var nonWS = ['\u0085', '\u200b', '\ufffe'].join('');
var nonWSregex = new $RegExp('[' + nonWS + ']', 'g');
var hasNonWS = bind.call(Function.call, $RegExp.prototype.test, nonWSregex);
var invalidHexLiteral = /^[-+]0x[0-9a-f]+$/i;
var isInvalidHexLiteral = bind.call(Function.call, $RegExp.prototype.test, invalidHexLiteral);
var $charCodeAt = bind.call(Function.call, $String.prototype.charCodeAt);
var toStr = bind.call(Function.call, Object.prototype.toString);
var $floor = Math.floor;
var $abs = Math.abs;
var $ObjectCreate = Object.create;
var $gOPD = $Object.getOwnPropertyDescriptor;
var $isExtensible = $Object.isExtensible;
// whitespace from: http://es5.github.io/#x15.5.4.20
// implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324
var ws = [
'\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003',
'\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028',
'\u2029\uFEFF'
].join('');
var trimRegex = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g');
var replace = bind.call(Function.call, $String.prototype.replace);
var trim = function (value) {
return replace(value, trimRegex, '');
};
var ES5 = require('./es5');
var hasRegExpMatcher = require('is-regex');
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-abstract-operations
var ES6 = assign(assign({}, ES5), {
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-call-f-v-args
Call: function Call(F, V) {
var args = arguments.length > 2 ? arguments[2] : [];
if (!this.IsCallable(F)) {
throw new $TypeError(F + ' is not a function');
}
return F.apply(V, args);
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-toprimitive
ToPrimitive: toPrimitive,
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-toboolean
// ToBoolean: ES5.ToBoolean,
// https://ecma-international.org/ecma-262/6.0/#sec-tonumber
ToNumber: function ToNumber(argument) {
var value = isPrimitive(argument) ? argument : toPrimitive(argument, $Number);
if (typeof value === 'symbol') {
throw new $TypeError('Cannot convert a Symbol value to a number');
}
if (typeof value === 'string') {
if (isBinary(value)) {
return this.ToNumber(parseInteger(strSlice(value, 2), 2));
} else if (isOctal(value)) {
return this.ToNumber(parseInteger(strSlice(value, 2), 8));
} else if (hasNonWS(value) || isInvalidHexLiteral(value)) {
return NaN;
} else {
var trimmed = trim(value);
if (trimmed !== value) {
return this.ToNumber(trimmed);
}
}
}
return $Number(value);
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tointeger
// ToInteger: ES5.ToNumber,
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-toint32
// ToInt32: ES5.ToInt32,
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-touint32
// ToUint32: ES5.ToUint32,
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-toint16
ToInt16: function ToInt16(argument) {
var int16bit = this.ToUint16(argument);
return int16bit >= 0x8000 ? int16bit - 0x10000 : int16bit;
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-touint16
// ToUint16: ES5.ToUint16,
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-toint8
ToInt8: function ToInt8(argument) {
var int8bit = this.ToUint8(argument);
return int8bit >= 0x80 ? int8bit - 0x100 : int8bit;
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-touint8
ToUint8: function ToUint8(argument) {
var number = this.ToNumber(argument);
if ($isNaN(number) || number === 0 || !$isFinite(number)) { return 0; }
var posInt = sign(number) * $floor($abs(number));
return mod(posInt, 0x100);
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-touint8clamp
ToUint8Clamp: function ToUint8Clamp(argument) {
var number = this.ToNumber(argument);
if ($isNaN(number) || number <= 0) { return 0; }
if (number >= 0xFF) { return 0xFF; }
var f = $floor(argument);
if (f + 0.5 < number) { return f + 1; }
if (number < f + 0.5) { return f; }
if (f % 2 !== 0) { return f + 1; }
return f;
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tostring
ToString: function ToString(argument) {
if (typeof argument === 'symbol') {
throw new $TypeError('Cannot convert a Symbol value to a string');
}
return $String(argument);
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-toobject
ToObject: function ToObject(value) {
this.RequireObjectCoercible(value);
return $Object(value);
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-topropertykey
ToPropertyKey: function ToPropertyKey(argument) {
var key = this.ToPrimitive(argument, $String);
return typeof key === 'symbol' ? key : this.ToString(key);
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength
ToLength: function ToLength(argument) {
var len = this.ToInteger(argument);
if (len <= 0) { return 0; } // includes converting -0 to +0
if (len > MAX_SAFE_INTEGER) { return MAX_SAFE_INTEGER; }
return len;
},
// https://ecma-international.org/ecma-262/6.0/#sec-canonicalnumericindexstring
CanonicalNumericIndexString: function CanonicalNumericIndexString(argument) {
if (toStr(argument) !== '[object String]') {
throw new $TypeError('must be a string');
}
if (argument === '-0') { return -0; }
var n = this.ToNumber(argument);
if (this.SameValue(this.ToString(n), argument)) { return n; }
return void 0;
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-requireobjectcoercible
RequireObjectCoercible: ES5.CheckObjectCoercible,
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-isarray
IsArray: $Array.isArray || function IsArray(argument) {
return toStr(argument) === '[object Array]';
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-iscallable
// IsCallable: ES5.IsCallable,
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-isconstructor
IsConstructor: function IsConstructor(argument) {
return typeof argument === 'function' && !!argument.prototype; // unfortunately there's no way to truly check this without try/catch `new argument`
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-isextensible-o
IsExtensible: Object.preventExtensions
? function IsExtensible(obj) {
if (isPrimitive(obj)) {
return false;
}
return $isExtensible(obj);
}
: function isExtensible(obj) { return true; }, // eslint-disable-line no-unused-vars
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-isinteger
IsInteger: function IsInteger(argument) {
if (typeof argument !== 'number' || $isNaN(argument) || !$isFinite(argument)) {
return false;
}
var abs = $abs(argument);
return $floor(abs) === abs;
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-ispropertykey
IsPropertyKey: function IsPropertyKey(argument) {
return typeof argument === 'string' || typeof argument === 'symbol';
},
// https://ecma-international.org/ecma-262/6.0/#sec-isregexp
IsRegExp: function IsRegExp(argument) {
if (!argument || typeof argument !== 'object') {
return false;
}
if (hasSymbols) {
var isRegExp = argument[$Symbol.match];
if (typeof isRegExp !== 'undefined') {
return ES5.ToBoolean(isRegExp);
}
}
return hasRegExpMatcher(argument);
},
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevalue
// SameValue: ES5.SameValue,
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero
SameValueZero: function SameValueZero(x, y) {
return (x === y) || ($isNaN(x) && $isNaN(y));
},
/**
* 7.3.2 GetV (V, P)
* 1. Assert: IsPropertyKey(P) is true.
* 2. Let O be ToObject(V).
* 3. ReturnIfAbrupt(O).
* 4. Return O.[[Get]](P, V).
*/
GetV: function GetV(V, P) {
// 7.3.2.1
if (!this.IsPropertyKey(P)) {
throw new $TypeError('Assertion failed: IsPropertyKey(P) is not true');
}
// 7.3.2.2-3
var O = this.ToObject(V);
// 7.3.2.4
return O[P];
},
/**
* 7.3.9 - https://ecma-international.org/ecma-262/6.0/#sec-getmethod
* 1. Assert: IsPropertyKey(P) is true.
* 2. Let func be GetV(O, P).
* 3. ReturnIfAbrupt(func).
* 4. If func is either undefined or null, return undefined.
* 5. If IsCallable(func) is false, throw a TypeError exception.
* 6. Return func.
*/
GetMethod: function GetMethod(O, P) {
// 7.3.9.1
if (!this.IsPropertyKey(P)) {
throw new $TypeError('Assertion failed: IsPropertyKey(P) is not true');
}
// 7.3.9.2
var func = this.GetV(O, P);
// 7.3.9.4
if (func == null) {
return void 0;
}
// 7.3.9.5
if (!this.IsCallable(func)) {
throw new $TypeError(P + 'is not a function');
}
// 7.3.9.6
return func;
},
/**
* 7.3.1 Get (O, P) - https://ecma-international.org/ecma-262/6.0/#sec-get-o-p
* 1. Assert: Type(O) is Object.
* 2. Assert: IsPropertyKey(P) is true.
* 3. Return O.[[Get]](P, O).
*/
Get: function Get(O, P) {
// 7.3.1.1
if (this.Type(O) !== 'Object') {
throw new $TypeError('Assertion failed: Type(O) is not Object');
}
// 7.3.1.2
if (!this.IsPropertyKey(P)) {
throw new $TypeError('Assertion failed: IsPropertyKey(P) is not true');
}
// 7.3.1.3
return O[P];
},
Type: function Type(x) {
if (typeof x === 'symbol') {
return 'Symbol';
}
return ES5.Type(x);
},
// https://ecma-international.org/ecma-262/6.0/#sec-speciesconstructor
SpeciesConstructor: function SpeciesConstructor(O, defaultConstructor) {
if (this.Type(O) !== 'Object') {
throw new $TypeError('Assertion failed: Type(O) is not Object');
}
var C = O.constructor;
if (typeof C === 'undefined') {
return defaultConstructor;
}
if (this.Type(C) !== 'Object') {
throw new $TypeError('O.constructor is not an Object');
}
var S = hasSymbols && $Symbol.species ? C[$Symbol.species] : void 0;
if (S == null) {
return defaultConstructor;
}
if (this.IsConstructor(S)) {
return S;
}
throw new $TypeError('no constructor found');
},
// https://ecma-international.org/ecma-262/6.0/#sec-completepropertydescriptor
CompletePropertyDescriptor: function CompletePropertyDescriptor(Desc) {
if (!this.IsPropertyDescriptor(Desc)) {
throw new $TypeError('Desc must be a Property Descriptor');
}
if (this.IsGenericDescriptor(Desc) || this.IsDataDescriptor(Desc)) {
if (!has(Desc, '[[Value]]')) {
Desc['[[Value]]'] = void 0;
}
if (!has(Desc, '[[Writable]]')) {
Desc['[[Writable]]'] = false;
}
} else {
if (!has(Desc, '[[Get]]')) {
Desc['[[Get]]'] = void 0;
}
if (!has(Desc, '[[Set]]')) {
Desc['[[Set]]'] = void 0;
}
}
if (!has(Desc, '[[Enumerable]]')) {
Desc['[[Enumerable]]'] = false;
}
if (!has(Desc, '[[Configurable]]')) {
Desc['[[Configurable]]'] = false;
}
return Desc;
},
// https://ecma-international.org/ecma-262/6.0/#sec-set-o-p-v-throw
Set: function Set(O, P, V, Throw) {
if (this.Type(O) !== 'Object') {
throw new $TypeError('O must be an Object');
}
if (!this.IsPropertyKey(P)) {
throw new $TypeError('P must be a Property Key');
}
if (this.Type(Throw) !== 'Boolean') {
throw new $TypeError('Throw must be a Boolean');
}
if (Throw) {
O[P] = V;
return true;
} else {
try {
O[P] = V;
} catch (e) {
return false;
}
}
},
// https://ecma-international.org/ecma-262/6.0/#sec-hasownproperty
HasOwnProperty: function HasOwnProperty(O, P) {
if (this.Type(O) !== 'Object') {
throw new $TypeError('O must be an Object');
}
if (!this.IsPropertyKey(P)) {
throw new $TypeError('P must be a Property Key');
}
return has(O, P);
},
// https://ecma-international.org/ecma-262/6.0/#sec-hasproperty
HasProperty: function HasProperty(O, P) {
if (this.Type(O) !== 'Object') {
throw new $TypeError('O must be an Object');
}
if (!this.IsPropertyKey(P)) {
throw new $TypeError('P must be a Property Key');
}
return P in O;
},
// https://ecma-international.org/ecma-262/6.0/#sec-isconcatspreadable
IsConcatSpreadable: function IsConcatSpreadable(O) {
if (this.Type(O) !== 'Object') {
return false;
}
if (hasSymbols && typeof $Symbol.isConcatSpreadable === 'symbol') {
var spreadable = this.Get(O, Symbol.isConcatSpreadable);
if (typeof spreadable !== 'undefined') {
return this.ToBoolean(spreadable);
}
}
return this.IsArray(O);
},
// https://ecma-international.org/ecma-262/6.0/#sec-invoke
Invoke: function Invoke(O, P) {
if (!this.IsPropertyKey(P)) {
throw new $TypeError('P must be a Property Key');
}
var argumentsList = arraySlice(arguments, 2);
var func = this.GetV(O, P);
return this.Call(func, O, argumentsList);
},
// https://ecma-international.org/ecma-262/6.0/#sec-getiterator
GetIterator: function GetIterator(obj, method) {
if (!hasSymbols) {
throw new SyntaxError('ES.GetIterator depends on native iterator support.');
}
var actualMethod = method;
if (arguments.length < 2) {
actualMethod = this.GetMethod(obj, $Symbol.iterator);
}
var iterator = this.Call(actualMethod, obj);
if (this.Type(iterator) !== 'Object') {
throw new $TypeError('iterator must return an object');
}
return iterator;
},
// https://ecma-international.org/ecma-262/6.0/#sec-iteratornext
IteratorNext: function IteratorNext(iterator, value) {
var result = this.Invoke(iterator, 'next', arguments.length < 2 ? [] : [value]);
if (this.Type(result) !== 'Object') {
throw new $TypeError('iterator next must return an object');
}
return result;
},
// https://ecma-international.org/ecma-262/6.0/#sec-iteratorcomplete
IteratorComplete: function IteratorComplete(iterResult) {
if (this.Type(iterResult) !== 'Object') {
throw new $TypeError('Assertion failed: Type(iterResult) is not Object');
}
return this.ToBoolean(this.Get(iterResult, 'done'));
},
// https://ecma-international.org/ecma-262/6.0/#sec-iteratorvalue
IteratorValue: function IteratorValue(iterResult) {
if (this.Type(iterResult) !== 'Object') {
throw new $TypeError('Assertion failed: Type(iterResult) is not Object');
}
return this.Get(iterResult, 'value');
},
// https://ecma-international.org/ecma-262/6.0/#sec-iteratorstep
IteratorStep: function IteratorStep(iterator) {
var result = this.IteratorNext(iterator);
var done = this.IteratorComplete(result);
return done === true ? false : result;
},
// https://ecma-international.org/ecma-262/6.0/#sec-iteratorclose
IteratorClose: function IteratorClose(iterator, completion) {
if (this.Type(iterator) !== 'Object') {
throw new $TypeError('Assertion failed: Type(iterator) is not Object');
}
if (!this.IsCallable(completion)) {
throw new $TypeError('Assertion failed: completion is not a thunk for a Completion Record');
}
var completionThunk = completion;
var iteratorReturn = this.GetMethod(iterator, 'return');
if (typeof iteratorReturn === 'undefined') {
return completionThunk();
}
var completionRecord;
try {
var innerResult = this.Call(iteratorReturn, iterator, []);
} catch (e) {
// if we hit here, then "e" is the innerResult completion that needs re-throwing
// if the completion is of type "throw", this will throw.
completionRecord = completionThunk();
completionThunk = null; // ensure it's not called twice.
// if not, then return the innerResult completion
throw e;
}
completionRecord = completionThunk(); // if innerResult worked, then throw if the completion does
completionThunk = null; // ensure it's not called twice.
if (this.Type(innerResult) !== 'Object') {
throw new $TypeError('iterator .return must return an object');
}
return completionRecord;
},
// https://ecma-international.org/ecma-262/6.0/#sec-createiterresultobject
CreateIterResultObject: function CreateIterResultObject(value, done) {
if (this.Type(done) !== 'Boolean') {
throw new $TypeError('Assertion failed: Type(done) is not Boolean');
}
return {
value: value,
done: done
};
},
// https://ecma-international.org/ecma-262/6.0/#sec-regexpexec
RegExpExec: function RegExpExec(R, S) {
if (this.Type(R) !== 'Object') {
throw new $TypeError('R must be an Object');
}
if (this.Type(S) !== 'String') {
throw new $TypeError('S must be a String');
}
var exec = this.Get(R, 'exec');
if (this.IsCallable(exec)) {
var result = this.Call(exec, R, [S]);
if (result === null || this.Type(result) === 'Object') {
return result;
}
throw new $TypeError('"exec" method must return `null` or an Object');
}
return regexExec(R, S);
},
// https://ecma-international.org/ecma-262/6.0/#sec-arrayspeciescreate
ArraySpeciesCreate: function ArraySpeciesCreate(originalArray, length) {
if (!this.IsInteger(length) || length < 0) {
throw new $TypeError('Assertion failed: length must be an integer >= 0');
}
var len = length === 0 ? 0 : length;
var C;
var isArray = this.IsArray(originalArray);
if (isArray) {
C = this.Get(originalArray, 'constructor');
// TODO: figure out how to make a cross-realm normal Array, a same-realm Array
// if (this.IsConstructor(C)) {
// if C is another realm's Array, C = undefined
// Object.getPrototypeOf(Object.getPrototypeOf(Object.getPrototypeOf(Array))) === null ?
// }
if (this.Type(C) === 'Object' && hasSymbols && $Symbol.species) {
C = this.Get(C, $Symbol.species);
if (C === null) {
C = void 0;
}
}
}
if (typeof C === 'undefined') {
return $Array(len);
}
if (!this.IsConstructor(C)) {
throw new $TypeError('C must be a constructor');
}
return new C(len); // this.Construct(C, len);
},
CreateDataProperty: function CreateDataProperty(O, P, V) {
if (this.Type(O) !== 'Object') {
throw new $TypeError('Assertion failed: Type(O) is not Object');
}
if (!this.IsPropertyKey(P)) {
throw new $TypeError('Assertion failed: IsPropertyKey(P) is not true');
}
var oldDesc = $gOPD(O, P);
var extensible = oldDesc || (typeof $isExtensible !== 'function' || $isExtensible(O));
var immutable = oldDesc && (!oldDesc.writable || !oldDesc.configurable);
if (immutable || !extensible) {
return false;
}
var newDesc = {
configurable: true,
enumerable: true,
value: V,
writable: true
};
Object.defineProperty(O, P, newDesc);
return true;
},
// https://ecma-international.org/ecma-262/6.0/#sec-createdatapropertyorthrow
CreateDataPropertyOrThrow: function CreateDataPropertyOrThrow(O, P, V) {
if (this.Type(O) !== 'Object') {
throw new $TypeError('Assertion failed: Type(O) is not Object');
}
if (!this.IsPropertyKey(P)) {
throw new $TypeError('Assertion failed: IsPropertyKey(P) is not true');
}
var success = this.CreateDataProperty(O, P, V);
if (!success) {
throw new $TypeError('unable to create data property');
}
return success;
},
// https://www.ecma-international.org/ecma-262/6.0/#sec-objectcreate
ObjectCreate: function ObjectCreate(proto, internalSlotsList) {
if (proto !== null && this.Type(proto) !== 'Object') {
throw new $TypeError('Assertion failed: proto must be null or an object');
}
var slots = arguments.length < 2 ? [] : internalSlotsList;
if (slots.length > 0) {
throw new $SyntaxError('es-abstract does not yet support internal slots');
}
if (proto === null && !$ObjectCreate) {
throw new $SyntaxError('native Object.create support is required to create null objects');
}
return $ObjectCreate(proto);
},
// https://ecma-international.org/ecma-262/6.0/#sec-advancestringindex
AdvanceStringIndex: function AdvanceStringIndex(S, index, unicode) {
if (this.Type(S) !== 'String') {
throw new $TypeError('S must be a String');
}
if (!this.IsInteger(index) || index < 0 || index > MAX_SAFE_INTEGER) {
throw new $TypeError('Assertion failed: length must be an integer >= 0 and <= 2**53');
}
if (this.Type(unicode) !== 'Boolean') {
throw new $TypeError('Assertion failed: unicode must be a Boolean');
}
if (!unicode) {
return index + 1;
}
var length = S.length;
if ((index + 1) >= length) {
return index + 1;
}
var first = $charCodeAt(S, index);
if (first < 0xD800 || first > 0xDBFF) {
return index + 1;
}
var second = $charCodeAt(S, index + 1);
if (second < 0xDC00 || second > 0xDFFF) {
return index + 1;
}
return index + 2;
}
});
delete ES6.CheckObjectCoercible; // renamed in ES6 to RequireObjectCoercible
module.exports = ES6;
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