third_party/v8/src/builtins/proxy-constructor.tq

// 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 {

// ES #sec-proxy-constructor
// https://tc39.github.io/ecma262/#sec-proxy-constructor
transitioning javascript builtin
ProxyConstructor(
    js-implicit context: NativeContext, receiver: JSAny, newTarget: JSAny)(
    target: JSAny, handler: JSAny): JSProxy {
  try {
    // 1. If NewTarget is undefined, throw a TypeError exception.
    if (newTarget == Undefined) {
      ThrowTypeError(MessageTemplate::kConstructorNotFunction, 'Proxy');
    }

    // 2. Return ? ProxyCreate(target, handler).
    // https://tc39.github.io/ecma262/#sec-proxycreate
    // 1. If Type(target) is not Object, throw a TypeError exception.
    // 2. If Type(handler) is not Object, throw a TypeError exception.
    const targetJSReceiver =
        Cast<JSReceiver>(target) otherwise ThrowProxyNonObject;
    const handlerJSReceiver =
        Cast<JSReceiver>(handler) otherwise ThrowProxyNonObject;

    // 5. Let P be a newly created object.
    // 6. Set P's essential internal methods (except for [[Call]] and
    //    [[Construct]]) to the definitions specified in 9.5.
    // 7. If IsCallable(target) is true, then
    //    a. Set P.[[Call]] as specified in 9.5.12.
    //    b. If IsConstructor(target) is true, then
    //       1. Set P.[[Construct]] as specified in 9.5.13.
    // 8. Set P.[[ProxyTarget]] to target.
    // 9. Set P.[[ProxyHandler]] to handler.
    // 10. Return P.
    return AllocateProxy(targetJSReceiver, handlerJSReceiver);
  } label ThrowProxyNonObject deferred {
    ThrowTypeError(MessageTemplate::kProxyNonObject);
  }
}
}