www.aleph1.co.uk Git - yaffs-website/blob - node_modules/core-js/library/modules/es6.reflect.set.js

   1 // 26.1.13 Reflect.set(target, propertyKey, V [, receiver])
   2 var dP             = require('./_object-dp')
   3   , gOPD           = require('./_object-gopd')
   4   , getPrototypeOf = require('./_object-gpo')
   5   , has            = require('./_has')
   6   , $export        = require('./_export')
   7   , createDesc     = require('./_property-desc')
   8   , anObject       = require('./_an-object')
   9   , isObject       = require('./_is-object');
  10
  11 function set(target, propertyKey, V/*, receiver*/){
  12   var receiver = arguments.length < 4 ? target : arguments[3]
  13     , ownDesc  = gOPD.f(anObject(target), propertyKey)
  14     , existingDescriptor, proto;
  15   if(!ownDesc){
  16     if(isObject(proto = getPrototypeOf(target))){
  17       return set(proto, propertyKey, V, receiver);
  18     }
  19     ownDesc = createDesc(0);
  20   }
  21   if(has(ownDesc, 'value')){
  22     if(ownDesc.writable === false || !isObject(receiver))return false;
  23     existingDescriptor = gOPD.f(receiver, propertyKey) || createDesc(0);
  24     existingDescriptor.value = V;
  25     dP.f(receiver, propertyKey, existingDescriptor);
  26     return true;
  27   }
  28   return ownDesc.set === undefined ? false : (ownDesc.set.call(receiver, V), true);
  29 }
  30
  31 $export($export.S, 'Reflect', {set: set});