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 80
