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node_modules/es-abstract/es5.js

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+'use strict';
+
+var GetIntrinsic = require('./GetIntrinsic');
+
+var $Object = GetIntrinsic('%Object%');
+var $TypeError = GetIntrinsic('%TypeError%');
+var $String = GetIntrinsic('%String%');
+
+var assertRecord = require('./helpers/assertRecord');
+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
+		};
+
+		for (var key in Desc) { // eslint-disable-line
+			if (has(Desc, key) && !allowed[key]) {
+				return false;
+			}
+		}
+
+		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;
+		}
+
+		assertRecord(this, 'Property Descriptor', 'Desc', Desc);
+
+		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;
+		}
+
+		assertRecord(this, 'Property Descriptor', 'Desc', Desc);
+
+		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;
+		}
+
+		assertRecord(this, 'Property Descriptor', 'Desc', Desc);
+
+		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;
+		}
+
+		assertRecord(this, 'Property Descriptor', 'Desc', Desc);
+
+		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;