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Diffstat (limited to 'deps/npm/node_modules/es-abstract/es5.js')
-rw-r--r-- | deps/npm/node_modules/es-abstract/es5.js | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/deps/npm/node_modules/es-abstract/es5.js b/deps/npm/node_modules/es-abstract/es5.js new file mode 100644 index 00000000000..3af7e7ea3d5 --- /dev/null +++ b/deps/npm/node_modules/es-abstract/es5.js @@ -0,0 +1,242 @@ +'use strict'; + +var GetIntrinsic = require('./GetIntrinsic'); + +var $Object = GetIntrinsic('%Object%'); +var $TypeError = GetIntrinsic('%TypeError%'); +var $String = GetIntrinsic('%String%'); + +var $isNaN = require('./helpers/isNaN'); +var $isFinite = require('./helpers/isFinite'); + +var sign = require('./helpers/sign'); +var mod = require('./helpers/mod'); + +var IsCallable = require('is-callable'); +var toPrimitive = require('es-to-primitive/es5'); + +var has = require('has'); + +// https://es5.github.io/#x9 +var ES5 = { + ToPrimitive: toPrimitive, + + ToBoolean: function ToBoolean(value) { + return !!value; + }, + ToNumber: function ToNumber(value) { + return +value; // eslint-disable-line no-implicit-coercion + }, + ToInteger: function ToInteger(value) { + var number = this.ToNumber(value); + if ($isNaN(number)) { return 0; } + if (number === 0 || !$isFinite(number)) { return number; } + return sign(number) * Math.floor(Math.abs(number)); + }, + ToInt32: function ToInt32(x) { + return this.ToNumber(x) >> 0; + }, + ToUint32: function ToUint32(x) { + return this.ToNumber(x) >>> 0; + }, + ToUint16: function ToUint16(value) { + var number = this.ToNumber(value); + if ($isNaN(number) || number === 0 || !$isFinite(number)) { return 0; } + var posInt = sign(number) * Math.floor(Math.abs(number)); + return mod(posInt, 0x10000); + }, + ToString: function ToString(value) { + return $String(value); + }, + ToObject: function ToObject(value) { + this.CheckObjectCoercible(value); + return $Object(value); + }, + CheckObjectCoercible: function CheckObjectCoercible(value, optMessage) { + /* jshint eqnull:true */ + if (value == null) { + throw new $TypeError(optMessage || 'Cannot call method on ' + value); + } + return value; + }, + IsCallable: IsCallable, + SameValue: function SameValue(x, y) { + if (x === y) { // 0 === -0, but they are not identical. + if (x === 0) { return 1 / x === 1 / y; } + return true; + } + return $isNaN(x) && $isNaN(y); + }, + + // https://www.ecma-international.org/ecma-262/5.1/#sec-8 + Type: function Type(x) { + if (x === null) { + return 'Null'; + } + if (typeof x === 'undefined') { + return 'Undefined'; + } + if (typeof x === 'function' || typeof x === 'object') { + return 'Object'; + } + if (typeof x === 'number') { + return 'Number'; + } + if (typeof x === 'boolean') { + return 'Boolean'; + } + if (typeof x === 'string') { + return 'String'; + } + }, + + // https://ecma-international.org/ecma-262/6.0/#sec-property-descriptor-specification-type + IsPropertyDescriptor: function IsPropertyDescriptor(Desc) { + if (this.Type(Desc) !== 'Object') { + return false; + } + var allowed = { + '[[Configurable]]': true, + '[[Enumerable]]': true, + '[[Get]]': true, + '[[Set]]': true, + '[[Value]]': true, + '[[Writable]]': true + }; + // jscs:disable + for (var key in Desc) { // eslint-disable-line + if (has(Desc, key) && !allowed[key]) { + return false; + } + } + // jscs:enable + var isData = has(Desc, '[[Value]]'); + var IsAccessor = has(Desc, '[[Get]]') || has(Desc, '[[Set]]'); + if (isData && IsAccessor) { + throw new $TypeError('Property Descriptors may not be both accessor and data descriptors'); + } + return true; + }, + + // https://ecma-international.org/ecma-262/5.1/#sec-8.10.1 + IsAccessorDescriptor: function IsAccessorDescriptor(Desc) { + if (typeof Desc === 'undefined') { + return false; + } + + if (!this.IsPropertyDescriptor(Desc)) { + throw new $TypeError('Desc must be a Property Descriptor'); + } + + if (!has(Desc, '[[Get]]') && !has(Desc, '[[Set]]')) { + return false; + } + + return true; + }, + + // https://ecma-international.org/ecma-262/5.1/#sec-8.10.2 + IsDataDescriptor: function IsDataDescriptor(Desc) { + if (typeof Desc === 'undefined') { + return false; + } + + if (!this.IsPropertyDescriptor(Desc)) { + throw new $TypeError('Desc must be a Property Descriptor'); + } + + if (!has(Desc, '[[Value]]') && !has(Desc, '[[Writable]]')) { + return false; + } + + return true; + }, + + // https://ecma-international.org/ecma-262/5.1/#sec-8.10.3 + IsGenericDescriptor: function IsGenericDescriptor(Desc) { + if (typeof Desc === 'undefined') { + return false; + } + + if (!this.IsPropertyDescriptor(Desc)) { + throw new $TypeError('Desc must be a Property Descriptor'); + } + + if (!this.IsAccessorDescriptor(Desc) && !this.IsDataDescriptor(Desc)) { + return true; + } + + return false; + }, + + // https://ecma-international.org/ecma-262/5.1/#sec-8.10.4 + FromPropertyDescriptor: function FromPropertyDescriptor(Desc) { + if (typeof Desc === 'undefined') { + return Desc; + } + + if (!this.IsPropertyDescriptor(Desc)) { + throw new $TypeError('Desc must be a Property Descriptor'); + } + + if (this.IsDataDescriptor(Desc)) { + return { + value: Desc['[[Value]]'], + writable: !!Desc['[[Writable]]'], + enumerable: !!Desc['[[Enumerable]]'], + configurable: !!Desc['[[Configurable]]'] + }; + } else if (this.IsAccessorDescriptor(Desc)) { + return { + get: Desc['[[Get]]'], + set: Desc['[[Set]]'], + enumerable: !!Desc['[[Enumerable]]'], + configurable: !!Desc['[[Configurable]]'] + }; + } else { + throw new $TypeError('FromPropertyDescriptor must be called with a fully populated Property Descriptor'); + } + }, + + // https://ecma-international.org/ecma-262/5.1/#sec-8.10.5 + ToPropertyDescriptor: function ToPropertyDescriptor(Obj) { + if (this.Type(Obj) !== 'Object') { + throw new $TypeError('ToPropertyDescriptor requires an object'); + } + + var desc = {}; + if (has(Obj, 'enumerable')) { + desc['[[Enumerable]]'] = this.ToBoolean(Obj.enumerable); + } + if (has(Obj, 'configurable')) { + desc['[[Configurable]]'] = this.ToBoolean(Obj.configurable); + } + if (has(Obj, 'value')) { + desc['[[Value]]'] = Obj.value; + } + if (has(Obj, 'writable')) { + desc['[[Writable]]'] = this.ToBoolean(Obj.writable); + } + if (has(Obj, 'get')) { + var getter = Obj.get; + if (typeof getter !== 'undefined' && !this.IsCallable(getter)) { + throw new TypeError('getter must be a function'); + } + desc['[[Get]]'] = getter; + } + if (has(Obj, 'set')) { + var setter = Obj.set; + if (typeof setter !== 'undefined' && !this.IsCallable(setter)) { + throw new $TypeError('setter must be a function'); + } + desc['[[Set]]'] = setter; + } + + if ((has(desc, '[[Get]]') || has(desc, '[[Set]]')) && (has(desc, '[[Value]]') || has(desc, '[[Writable]]'))) { + throw new $TypeError('Invalid property descriptor. Cannot both specify accessors and a value or writable attribute'); + } + return desc; + } +}; + +module.exports = ES5; |