mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
/*
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* Copyright (C) 2008 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "Label.h"
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namespace JSC {
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class Identifier;
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class LabelScope {
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WTF_MAKE_NONCOPYABLE(LabelScope);
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public:
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enum Type { Loop, Switch, NamedLabel };
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LabelScope(Type type, const Identifier* name, int scopeDepth, Ref<Label>&& breakTarget, RefPtr<Label>&& continueTarget)
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: m_refCount(0)
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, m_type(type)
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, m_name(name)
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, m_scopeDepth(scopeDepth)
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, m_breakTarget(WTFMove(breakTarget))
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, m_continueTarget(WTFMove(continueTarget))
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{
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}
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Label& breakTarget() const { return m_breakTarget.get(); }
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Label* continueTarget() const { return m_continueTarget.get(); }
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Type type() const { return m_type; }
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const Identifier* name() const { return m_name; }
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int scopeDepth() const { return m_scopeDepth; }
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void ref() { ++m_refCount; }
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void deref()
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{
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--m_refCount;
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ASSERT(m_refCount >= 0);
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}
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int refCount() const { return m_refCount; }
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bool hasOneRef() const { return m_refCount == 1; }
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bool breakTargetMayBeBound() const
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{
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if (!hasOneRef())
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return true;
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if (!m_breakTarget->hasOneRef())
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return true;
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return m_breakTarget->isBound();
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}
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private:
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int m_refCount;
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Type m_type;
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const Identifier* m_name;
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int m_scopeDepth;
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Ref<Label> m_breakTarget;
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RefPtr<Label> m_continueTarget;
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};
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} // namespace JSC
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