53 lines
1.4 KiB
JavaScript
53 lines
1.4 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
var has = require('has');
|
||
|
|
|
||
|
|
var GetIntrinsic = require('get-intrinsic');
|
||
|
|
|
||
|
|
var $TypeError = GetIntrinsic('%TypeError%');
|
||
|
|
|
||
|
|
var Type = require('./Type');
|
||
|
|
var ToBoolean = require('./ToBoolean');
|
||
|
|
var IsCallable = require('./IsCallable');
|
||
|
|
|
||
|
|
// https://262.ecma-international.org/5.1/#sec-8.10.5
|
||
|
|
|
||
|
|
module.exports = function ToPropertyDescriptor(Obj) {
|
||
|
|
if (Type(Obj) !== 'Object') {
|
||
|
|
throw new $TypeError('ToPropertyDescriptor requires an object');
|
||
|
|
}
|
||
|
|
|
||
|
|
var desc = {};
|
||
|
|
if (has(Obj, 'enumerable')) {
|
||
|
|
desc['[[Enumerable]]'] = ToBoolean(Obj.enumerable);
|
||
|
|
}
|
||
|
|
if (has(Obj, 'configurable')) {
|
||
|
|
desc['[[Configurable]]'] = ToBoolean(Obj.configurable);
|
||
|
|
}
|
||
|
|
if (has(Obj, 'value')) {
|
||
|
|
desc['[[Value]]'] = Obj.value;
|
||
|
|
}
|
||
|
|
if (has(Obj, 'writable')) {
|
||
|
|
desc['[[Writable]]'] = ToBoolean(Obj.writable);
|
||
|
|
}
|
||
|
|
if (has(Obj, 'get')) {
|
||
|
|
var getter = Obj.get;
|
||
|
|
if (typeof getter !== 'undefined' && !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' && !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;
|
||
|
|
};
|