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							52 lines
						
					
					
						
							1.4 KiB
						
					
					
				
			
		
		
	
	
							52 lines
						
					
					
						
							1.4 KiB
						
					
					
				'use strict'; | 
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var has = require('has'); | 
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var GetIntrinsic = require('get-intrinsic'); | 
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var $TypeError = GetIntrinsic('%TypeError%'); | 
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var Type = require('./Type'); | 
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var ToBoolean = require('./ToBoolean'); | 
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var IsCallable = require('./IsCallable'); | 
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// https://262.ecma-international.org/5.1/#sec-8.10.5 | 
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module.exports = function ToPropertyDescriptor(Obj) { | 
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	if (Type(Obj) !== 'Object') { | 
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		throw new $TypeError('ToPropertyDescriptor requires an object'); | 
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	} | 
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	var desc = {}; | 
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	if (has(Obj, 'enumerable')) { | 
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		desc['[[Enumerable]]'] = ToBoolean(Obj.enumerable); | 
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	} | 
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	if (has(Obj, 'configurable')) { | 
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		desc['[[Configurable]]'] = ToBoolean(Obj.configurable); | 
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	} | 
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	if (has(Obj, 'value')) { | 
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		desc['[[Value]]'] = Obj.value; | 
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	} | 
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	if (has(Obj, 'writable')) { | 
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		desc['[[Writable]]'] = ToBoolean(Obj.writable); | 
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	} | 
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	if (has(Obj, 'get')) { | 
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		var getter = Obj.get; | 
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		if (typeof getter !== 'undefined' && !IsCallable(getter)) { | 
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			throw new $TypeError('getter must be a function'); | 
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		} | 
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		desc['[[Get]]'] = getter; | 
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	} | 
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	if (has(Obj, 'set')) { | 
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		var setter = Obj.set; | 
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		if (typeof setter !== 'undefined' && !IsCallable(setter)) { | 
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			throw new $TypeError('setter must be a function'); | 
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		} | 
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		desc['[[Set]]'] = setter; | 
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	} | 
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	if ((has(desc, '[[Get]]') || has(desc, '[[Set]]')) && (has(desc, '[[Value]]') || has(desc, '[[Writable]]'))) { | 
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		throw new $TypeError('Invalid property descriptor. Cannot both specify accessors and a value or writable attribute'); | 
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	} | 
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	return desc; | 
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};
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