source: webkit/trunk/JavaScriptCore/runtime/MathObject.h@ 47780

Last change on this file since 47780 was 47780, checked in by [email protected], 16 years ago

[ES5] Implement getOwnPropertyDescriptor
​https://bugs.webkit.org/show_bug.cgi?id=28724

Reviewed by Gavin Barraclough.

JavaScriptCore:
Implement the core runtime support for getOwnPropertyDescriptor.
This adds a virtual getOwnPropertyDescriptor method to every class
that implements getOwnPropertySlot that shadows the behaviour of
getOwnPropertySlot. The alternative would be to make getOwnPropertySlot
(or PropertySlots in general) provide property attribute information,
but quick testing showed this to be a regression.

WebCore:
Implement the WebCore side of getOwnPropertyDescriptor. This
requires a custom implementation of getOwnPropertyDescriptor
for every class with a custom implementation of getOwnPropertySlot.

The bindings generator has been updated to generate appropriate
versions of getOwnPropertyDescriptor for the general case where
a custom getOwnPropertyDescriptor is not needed. ES5 is vague
about how getOwnPropertyDescriptor should work in the context of
"host" functions with polymorphic GetOwnProperty, so it seems
okay that occasionally we "guess" what attributes -- eg. determining
whether a property is writable.

Test: fast/js/getOwnPropertyDescriptor.html
  • Property svn:eol-style set to native
File size: 1.6 KB
Line 
1/*
2 * Copyright (C) 1999-2000 Harri Porten ([email protected])
3 * Copyright (C) 2008 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 */
20
21#ifndef MathObject_h
22#define MathObject_h
23
24#include "JSObject.h"
25
26namespace JSC {
27
28 class MathObject : public JSObject {
29 public:
30 MathObject(ExecState*, PassRefPtr<Structure>);
31
32 virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
33 virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
34
35 virtual const ClassInfo* classInfo() const { return &info; }
36 static const ClassInfo info;
37
38 static PassRefPtr<Structure> createStructure(JSValue prototype)
39 {
40 return Structure::create(prototype, TypeInfo(ObjectType, HasDefaultMark));
41 }
42 };
43
44} // namespace JSC
45
46#endif // MathObject_h
Note: See TracBrowser for help on using the repository browser.