Move builtin JavaScript sources into own directory.

src/proxy.js

-// Copyright 2011 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.
-
-(function(global, utils) {
-
-"use strict";
-
-%CheckIsBootstrapping();
-
-// ----------------------------------------------------------------------------
-// Imports
-
-var GlobalFunction = global.Function;
-var GlobalObject = global.Object;
-
-var ToNameArray;
-
-utils.Import(function(from) {
-  ToNameArray = from.ToNameArray;
-});
-
-//----------------------------------------------------------------------------
-
-function ProxyCreate(handler, proto) {
-  if (!IS_SPEC_OBJECT(handler))
-    throw MakeTypeError(kProxyHandlerNonObject, "create")
-  if (IS_UNDEFINED(proto))
-    proto = null
-  else if (!(IS_SPEC_OBJECT(proto) || IS_NULL(proto)))
-    throw MakeTypeError(kProxyProtoNonObject)
-  return %CreateJSProxy(handler, proto)
-}
-
-function ProxyCreateFunction(handler, callTrap, constructTrap) {
-  if (!IS_SPEC_OBJECT(handler))
-    throw MakeTypeError(kProxyHandlerNonObject, "createFunction")
-  if (!IS_CALLABLE(callTrap))
-    throw MakeTypeError(kProxyTrapFunctionExpected, "call")
-  if (IS_UNDEFINED(constructTrap)) {
-    constructTrap = DerivedConstructTrap(callTrap)
-  } else if (IS_CALLABLE(constructTrap)) {
-    // Make sure the trap receives 'undefined' as this.
-    var construct = constructTrap
-    constructTrap = function() {
-      return %Apply(construct, UNDEFINED, arguments, 0, %_ArgumentsLength());
-    }
-  } else {
-    throw MakeTypeError(kProxyTrapFunctionExpected, "construct")
-  }
-  return %CreateJSFunctionProxy(
-    handler, callTrap, constructTrap, GlobalFunction.prototype)
-}
-
-// -------------------------------------------------------------------
-// Proxy Builtins
-
-function DerivedConstructTrap(callTrap) {
-  return function() {
-    var proto = this.prototype
-    if (!IS_SPEC_OBJECT(proto)) proto = GlobalObject.prototype
-    var obj = { __proto__: proto };
-    var result = %Apply(callTrap, obj, arguments, 0, %_ArgumentsLength());
-    return IS_SPEC_OBJECT(result) ? result : obj
-  }
-}
-
-function DelegateCallAndConstruct(callTrap, constructTrap) {
-  return function() {
-    return %Apply(%_IsConstructCall() ? constructTrap : callTrap,
-                  this, arguments, 0, %_ArgumentsLength())
-  }
-}
-
-function DerivedGetTrap(receiver, name) {
-  var desc = this.getPropertyDescriptor(name)
-  if (IS_UNDEFINED(desc)) { return desc }
-  if ('value' in desc) {
-    return desc.value
-  } else {
-    if (IS_UNDEFINED(desc.get)) { return desc.get }
-    // The proposal says: desc.get.call(receiver)
-    return %_CallFunction(receiver, desc.get)
-  }
-}
-
-function DerivedSetTrap(receiver, name, val) {
-  var desc = this.getOwnPropertyDescriptor(name)
-  if (desc) {
-    if ('writable' in desc) {
-      if (desc.writable) {
-        desc.value = val
-        this.defineProperty(name, desc)
-        return true
-      } else {
-        return false
-      }
-    } else { // accessor
-      if (desc.set) {
-        // The proposal says: desc.set.call(receiver, val)
-        %_CallFunction(receiver, val, desc.set)
-        return true
-      } else {
-        return false
-      }
-    }
-  }
-  desc = this.getPropertyDescriptor(name)
-  if (desc) {
-    if ('writable' in desc) {
-      if (desc.writable) {
-        // fall through
-      } else {
-        return false
-      }
-    } else { // accessor
-      if (desc.set) {
-        // The proposal says: desc.set.call(receiver, val)
-        %_CallFunction(receiver, val, desc.set)
-        return true
-      } else {
-        return false
-      }
-    }
-  }
-  this.defineProperty(name, {
-    value: val,
-    writable: true,
-    enumerable: true,
-    configurable: true});
-  return true;
-}
-
-function DerivedHasTrap(name) {
-  return !!this.getPropertyDescriptor(name)
-}
-
-function DerivedHasOwnTrap(name) {
-  return !!this.getOwnPropertyDescriptor(name)
-}
-
-function DerivedKeysTrap() {
-  var names = this.getOwnPropertyNames()
-  var enumerableNames = []
-  for (var i = 0, count = 0; i < names.length; ++i) {
-    var name = names[i]
-    if (IS_SYMBOL(name)) continue
-    var desc = this.getOwnPropertyDescriptor(TO_STRING(name))
-    if (!IS_UNDEFINED(desc) && desc.enumerable) {
-      enumerableNames[count++] = names[i]
-    }
-  }
-  return enumerableNames
-}
-
-function DerivedEnumerateTrap() {
-  var names = this.getPropertyNames()
-  var enumerableNames = []
-  for (var i = 0, count = 0; i < names.length; ++i) {
-    var name = names[i]
-    if (IS_SYMBOL(name)) continue
-    var desc = this.getPropertyDescriptor(TO_STRING(name))
-    if (!IS_UNDEFINED(desc)) {
-      if (!desc.configurable) {
-        throw MakeTypeError(kProxyPropNotConfigurable,
-                            this, name, "getPropertyDescriptor")
-      }
-      if (desc.enumerable) enumerableNames[count++] = names[i]
-    }
-  }
-  return enumerableNames
-}
-
-function ProxyEnumerate(proxy) {
-  var handler = %GetHandler(proxy)
-  if (IS_UNDEFINED(handler.enumerate)) {
-    return %Apply(DerivedEnumerateTrap, handler, [], 0, 0)
-  } else {
-    return ToNameArray(handler.enumerate(), "enumerate", false)
-  }
-}
-
-//-------------------------------------------------------------------
-
-var Proxy = new GlobalObject();
-%AddNamedProperty(global, "Proxy", Proxy, DONT_ENUM);
-
-//Set up non-enumerable properties of the Proxy object.
-utils.InstallFunctions(Proxy, DONT_ENUM, [
-  "create", ProxyCreate,
-  "createFunction", ProxyCreateFunction
-])
-
-// -------------------------------------------------------------------
-// Exports
-
-utils.Export(function(to) {
-  to.ProxyDelegateCallAndConstruct = DelegateCallAndConstruct;
-  to.ProxyDerivedHasOwnTrap = DerivedHasOwnTrap;
-  to.ProxyDerivedKeysTrap = DerivedKeysTrap;
-});
-
-%InstallToContext([
-  "derived_get_trap", DerivedGetTrap,
-  "derived_has_trap", DerivedHasTrap,
-  "derived_set_trap", DerivedSetTrap,
-  "proxy_enumerate", ProxyEnumerate,
-]);
-
-})