1// Copyright 2015 the V8 project authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5(function(global, utils) { 6 7"use strict"; 8 9%CheckIsBootstrapping(); 10 11// ---------------------------------------------------------------------------- 12// Imports 13// 14var GlobalProxy = global.Proxy; 15var MakeTypeError; 16 17utils.Import(function(from) { 18 MakeTypeError = from.MakeTypeError; 19}); 20 21//---------------------------------------------------------------------------- 22 23function ProxyCreateRevocable(target, handler) { 24 var p = new GlobalProxy(target, handler); 25 return {proxy: p, revoke: () => %JSProxyRevoke(p)}; 26} 27 28// ------------------------------------------------------------------- 29// Proxy Builtins 30 31// Implements part of ES6 9.5.11 Proxy.[[Enumerate]]: 32// Call the trap, which should return an iterator, exhaust the iterator, 33// and return an array containing the values. 34function ProxyEnumerate(trap, handler, target) { 35 // 7. Let trapResult be ? Call(trap, handler, «target»). 36 var trap_result = %_Call(trap, handler, target); 37 // 8. If Type(trapResult) is not Object, throw a TypeError exception. 38 if (!IS_RECEIVER(trap_result)) { 39 throw MakeTypeError(kProxyEnumerateNonObject); 40 } 41 // 9. Return trapResult. 42 var result = []; 43 for (var it = trap_result.next(); !it.done; it = trap_result.next()) { 44 var key = it.value; 45 // Not yet spec'ed as of 2015-11-25, but will be spec'ed soon: 46 // If the iterator returns a non-string value, throw a TypeError. 47 if (!IS_STRING(key)) { 48 throw MakeTypeError(kProxyEnumerateNonString); 49 } 50 result.push(key); 51 } 52 return result; 53} 54 55//------------------------------------------------------------------- 56 57//Set up non-enumerable properties of the Proxy object. 58utils.InstallFunctions(GlobalProxy, DONT_ENUM, [ 59 "revocable", ProxyCreateRevocable 60]); 61 62// ------------------------------------------------------------------- 63// Exports 64 65%InstallToContext([ 66 "proxy_enumerate", ProxyEnumerate, 67]); 68 69}) 70