/
es6.reflect.set.js
29 lines (27 loc) · 1.04 KB
/
es6.reflect.set.js
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// 26.1.13 Reflect.set(target, propertyKey, V [, receiver])
var $ = require('./$')
, has = require('./$.has')
, $def = require('./$.def')
, createDesc = require('./$.property-desc')
, anObject = require('./$.an-object')
, isObject = require('./$.is-object');
function set(target, propertyKey, V/*, receiver*/){
var receiver = arguments.length < 4 ? target : arguments[3]
, ownDesc = $.getDesc(anObject(target), propertyKey)
, existingDescriptor, proto;
if(!ownDesc){
if(isObject(proto = $.getProto(target))){
return set(proto, propertyKey, V, receiver);
}
ownDesc = createDesc(0);
}
if(has(ownDesc, 'value')){
if(ownDesc.writable === false || !isObject(receiver))return false;
existingDescriptor = $.getDesc(receiver, propertyKey) || createDesc(0);
existingDescriptor.value = V;
$.setDesc(receiver, propertyKey, existingDescriptor);
return true;
}
return ownDesc.set === undefined ? false : (ownDesc.set.call(receiver, V), true);
}
$def($def.S, 'Reflect', {set: set});