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4 years ago
'use strict';
var GetIntrinsic = require('../GetIntrinsic');
var $TypeError = GetIntrinsic('%TypeError%');
var Type = require('./Type');
var IsDataDescriptor = require('./IsDataDescriptor');
var IsAccessorDescriptor = require('./IsAccessorDescriptor');
var assertRecord = require('../helpers/assertRecord');
// https://ecma-international.org/ecma-262/5.1/#sec-8.10.4
module.exports = function FromPropertyDescriptor(Desc) {
if (typeof Desc === 'undefined') {
return Desc;
}
assertRecord(Type, 'Property Descriptor', 'Desc', Desc);
if (IsDataDescriptor(Desc)) {
return {
value: Desc['[[Value]]'],
writable: !!Desc['[[Writable]]'],
enumerable: !!Desc['[[Enumerable]]'],
configurable: !!Desc['[[Configurable]]']
};
} else if (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');
}
};