Version 3.7.1

src/proxy.js

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 global.Proxy = new $Object();
 
 var $Proxy = global.Proxy
 
 $Proxy.create = function(handler, proto) {
   if (!IS_SPEC_OBJECT(handler))
     throw MakeTypeError("handler_non_object", ["create"])
-  if (!IS_SPEC_OBJECT(proto)) proto = null  // Mozilla does this...
+  if (IS_UNDEFINED(proto))
+    proto = null
+  else if (!(IS_SPEC_OBJECT(proto) || proto === null))
+    throw MakeTypeError("proto_non_object", ["create"])
   return %CreateJSProxy(handler, proto)
 }
 
 $Proxy.createFunction = function(handler, callTrap, constructTrap) {
   if (!IS_SPEC_OBJECT(handler))
     throw MakeTypeError("handler_non_object", ["create"])
   if (!IS_SPEC_FUNCTION(callTrap))
     throw MakeTypeError("trap_function_expected", ["createFunction", "call"])
-  var construct
   if (IS_UNDEFINED(constructTrap)) {
-    construct = DerivedConstructTrap(callTrap)
+    constructTrap = DerivedConstructTrap(callTrap)
   } else if (IS_SPEC_FUNCTION(constructTrap)) {
-    construct = function() {
-      // Make sure the trap receives 'undefined' as this.
-      return %Apply(constructTrap, void 0, arguments, 0, %_ArgumentsLength());
+    // Make sure the trap receives 'undefined' as this.
+    var construct = constructTrap
+    constructTrap = function() {
+      return %Apply(construct, void 0, arguments, 0, %_ArgumentsLength());
     }
   } else {
     throw MakeTypeError("trap_function_expected",
                         ["createFunction", "construct"])
   }
   return %CreateJSFunctionProxy(
-    handler, callTrap, construct, $Function.prototype)
+    handler, callTrap, constructTrap, $Function.prototype)
 }
 
 
 
 ////////////////////////////////////////////////////////////////////////////////
 // Builtins
 ////////////////////////////////////////////////////////////////////////////////
 
 function DerivedConstructTrap(callTrap) {
   return function() {
@@ skipping 78 matching lines @@
 
 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 (this.getOwnPropertyDescriptor(TO_STRING_INLINE(name)).enumerable) {
+    var desc = this.getOwnPropertyDescriptor(TO_STRING_INLINE(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]
+    var desc = this.getPropertyDescriptor(TO_STRING_INLINE(name))
+    if (!IS_UNDEFINED(desc) && 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 ToStringArray(handler.enumerate(), "enumerate")
+  }
+}