// Copyright 2019 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include 'src/builtins/builtins-proxy-gen.h' namespace proxy { extern macro ProxiesCodeStubAssembler::AllocateProxyRevokeFunction( implicit context: Context)(JSProxy): JSFunction; // Proxy.revocable(target, handler) // https://tc39.github.io/ecma262/#sec-proxy.revocable transitioning javascript builtin ProxyRevocable(js-implicit context: NativeContext)( target: JSAny, handler: JSAny): JSProxyRevocableResult { try { // 1. Let p be ? ProxyCreate(target, handler). const targetJSReceiver = Cast<JSReceiver>(target) otherwise ThrowProxyNonObject; const handlerJSReceiver = Cast<JSReceiver>(handler) otherwise ThrowProxyNonObject; const proxy: JSProxy = AllocateProxy(targetJSReceiver, handlerJSReceiver); // 2. Let steps be the algorithm steps defined in Proxy Revocation // Functions. // 3. Let revoker be CreateBuiltinFunction(steps, « [[RevocableProxy]] »). // 4. Set revoker.[[RevocableProxy]] to p. const revoke: JSFunction = AllocateProxyRevokeFunction(proxy); // 5. Let result be ObjectCreate(%ObjectPrototype%). // 6. Perform CreateDataProperty(result, "proxy", p). // 7. Perform CreateDataProperty(result, "revoke", revoker). // 8. Return result. return NewJSProxyRevocableResult(proxy, revoke); } label ThrowProxyNonObject deferred { ThrowTypeError(MessageTemplate::kProxyNonObject, 'Proxy.revocable'); } } }