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'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;