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'use strict';
var GetIntrinsic = require('../GetIntrinsic');
var has = require('has');
var $TypeError = GetIntrinsic('%TypeError%');
module.exports = function IsPropertyDescriptor(ES, Desc) {
if (ES.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 no-restricted-syntax
if (has(Desc, key) && !allowed[key]) {
return false;
}
}
if (ES.IsDataDescriptor(Desc) && ES.IsAccessorDescriptor(Desc)) {
throw new $TypeError('Property Descriptors may not be both accessor and data descriptors');
}
return true;
};
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