Fix issue http://code.google.com/p/v8/issues/detail?id=32

Allows numberical strings as array index and make a call. e.g.,
callbacks['0']();

Added more test case for regexp (disabled by default, requires --call_regexp)
and call_as_function object created by API.

Review URL: http://codereview.chromium.org/1604

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@214 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ic.cc

@@ -250,6 +250,26 @@ void KeyedStoreIC::Clear(Address address, Code* target) {
 }
 
 
+Object* CallIC::TryCallAsFunction(Object* object) {
+  HandleScope scope;
+  Handle<Object> target(object);
+  Handle<Object> delegate = Execution::GetFunctionDelegate(target);
+
+  if (delegate->IsJSFunction()) {
+    // Patch the receiver and use the delegate as the function to
+    // invoke. This is used for invoking objects as if they were
+    // functions.
+    const int argc = this->target()->arguments_count();
+    StackFrameLocator locator;
+    JavaScriptFrame* frame = locator.FindJavaScriptFrame(0);
+    int index = frame->ComputeExpressionsCount() - (argc + 1);
+    frame->SetExpression(index, *target);
+  }
+
+  return *delegate;
+}
+
+
 Object* CallIC::LoadFunction(State state,
                              Handle<Object> object,
                              Handle<String> name) {
@@ -259,12 +279,26 @@ Object* CallIC::LoadFunction(State state,
     return TypeError("non_object_property_call", object, name);
   }
 
+  Object* result = Heap::the_hole_value();
+
+  // Check if the name is trivially convertible to an index and get
+  // the element if so.
+  uint32_t index;
+  if (name->AsArrayIndex(&index)) {
+    result = object->GetElement(index);
+    if (result->IsJSFunction()) return result;
+
+    // Try to find a suitable function delegate for the object at hand.
+    result = TryCallAsFunction(result);
+    if (result->IsJSFunction()) return result;
+
+    // Otherwise, it will fail in the lookup step.
+  }
+
   // Lookup the property in the object.
   LookupResult lookup;
   object->Lookup(*name, &lookup);
 
-  Object* result = Heap::the_hole_value();
-
   if (!lookup.IsValid()) {
     // If the object does not have the requested property, check which
     // exception we need to throw.
@@ -328,23 +362,9 @@ Object* CallIC::LoadFunction(State state,
   }
 
   // Try to find a suitable function delegate for the object at hand.
-  HandleScope scope;
-  Handle<Object> target(result);
-  Handle<Object> delegate = Execution::GetFunctionDelegate(target);
-
-  if (delegate->IsJSFunction()) {
-    // Patch the receiver and use the delegate as the function to
-    // invoke. This is used for invoking objects as if they were
-    // functions.
-    const int argc = this->target()->arguments_count();
-    StackFrameLocator locator;
-    JavaScriptFrame* frame = locator.FindJavaScriptFrame(0);
-    int index = frame->ComputeExpressionsCount() - (argc + 1);
-    frame->SetExpression(index, *target);
-    return *delegate;
-  } else {
-    return TypeError("property_not_function", object, name);
-  }
+  result = TryCallAsFunction(result);
+  return result->IsJSFunction() ?
+      result : TypeError("property_not_function", object, name);
 }
 
 

src/ic.h

@@ -183,6 +183,11 @@ class CallIC: public IC {
                     Handle<Object> object,
                     Handle<String> name);
 
+  // Returns a JSFunction if the object can be called as a function,
+  // and patches the stack to be ready for the call.
+  // Otherwise, it returns the undefined value.
+  Object* TryCallAsFunction(Object* object);
+
   static void Clear(Address address, Code* target);
   friend class IC;
 };

test/cctest/test-api.cc

@@ -3959,6 +3959,11 @@ THREADED_TEST(CallAsFunction) {
   CHECK(!try_catch.HasCaught());
   CHECK_EQ(49, value->Int32Value());
 
+  // test special case of call as function
+  value = Script::Compile(v8_str("[obj]['0'](45)"))->Run();
+  CHECK(!try_catch.HasCaught());
+  CHECK_EQ(45, value->Int32Value());
+
   value = Script::Compile(v8_str("obj.call = Function.prototype.call;"
                                  "obj.call(null, 87)"))->Run();
   CHECK(!try_catch.HasCaught());

test/mjsunit/number-string-index-call.js

@@ -0,0 +1,32 @@
+// Copyright 2008 Google Inc. 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --call_regexp
+var callbacks = [ function() {return 'foo'}, "nonobject", /abc/ ];
+assertEquals('foo', callbacks['0']());
+assertThrows("callbacks['1']()");
+assertEquals('abc', callbacks['2']("abcdefg"));