1/*
2 * Copyright (C) 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef LabelScope_h
30#define LabelScope_h
31
32#include <wtf/PassRefPtr.h>
33#include "Label.h"
34
35namespace JSC {
36
37 class Identifier;
38
39 class LabelScope {
40 public:
41 enum Type { Loop, Switch, NamedLabel };
42
43 LabelScope(Type type, const Identifier* name, int scopeDepth, PassRefPtr<Label> breakTarget, PassRefPtr<Label> continueTarget)
44 : m_refCount(0)
45 , m_type(type)
46 , m_name(name)
47 , m_scopeDepth(scopeDepth)
48 , m_breakTarget(breakTarget)
49 , m_continueTarget(continueTarget)
50 {
51 }
52
53 void ref() { ++m_refCount; }
54 void deref()
55 {
56 --m_refCount;
57 ASSERT(m_refCount >= 0);
58 }
59 int refCount() const { return m_refCount; }
60
61 Label* breakTarget() const { return m_breakTarget.get(); }
62 Label* continueTarget() const { return m_continueTarget.get(); }
63
64 Type type() const { return m_type; }
65 const Identifier* name() const { return m_name; }
66 int scopeDepth() const { return m_scopeDepth; }
67
68 private:
69 int m_refCount;
70 Type m_type;
71 const Identifier* m_name;
72 int m_scopeDepth;
73 RefPtr<Label> m_breakTarget;
74 RefPtr<Label> m_continueTarget;
75 };
76
77} // namespace JSC
78
79#endif // LabelScope_h
80

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/bytecompiler/LabelScope.h