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/*
* Copyright (C) 2012 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ResolveGlobalStatus_h
#define ResolveGlobalStatus_h
#include "JSValue.h"
#include "PropertyOffset.h"
#include <wtf/NotFound.h>
namespace JSC {
class CodeBlock;
class Identifier;
struct ResolveOperation;
class Structure;
class ResolveGlobalStatus {
public:
enum State {
NoInformation,
Simple,
TakesSlowPath
};
ResolveGlobalStatus()
: m_state(NoInformation)
, m_structure(0)
, m_offset(invalidOffset)
{
}
ResolveGlobalStatus(
State state, Structure* structure = 0, PropertyOffset offset = invalidOffset,
JSValue specificValue = JSValue())
: m_state(state)
, m_structure(structure)
, m_offset(offset)
, m_specificValue(specificValue)
{
}
static ResolveGlobalStatus computeFor(CodeBlock*, int bytecodeIndex, ResolveOperation*, Identifier&);
State state() const { return m_state; }
bool isSet() const { return m_state != NoInformation; }
bool operator!() const { return !isSet(); }
bool isSimple() const { return m_state == Simple; }
bool takesSlowPath() const { return m_state == TakesSlowPath; }
Structure* structure() const { return m_structure; }
PropertyOffset offset() const { return m_offset; }
JSValue specificValue() const { return m_specificValue; }
private:
State m_state;
Structure* m_structure;
PropertyOffset m_offset;
JSValue m_specificValue;
}; // class ResolveGlobalStatus
} // namespace JSC
#endif // ResolveGlobalStatus_h
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