| | 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 | |
| | 35 | namespace 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 |
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