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/*
* Copyright (C) 2009 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 COMPUTER, 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 COMPUTER, 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 IdentifierRep_h
#define IdentifierRep_h
#include <wtf/Assertions.h>
#include <wtf/FastAllocBase.h>
#include <string.h>
namespace WebCore {
class IdentifierRep : public FastAllocBase {
public:
static IdentifierRep* get(int);
static IdentifierRep* get(const char*);
static bool isValid(IdentifierRep*);
bool isString() const { return m_isString; }
int number() const { return m_isString ? 0 : m_value.m_number; }
const char* string() const { return m_isString ? m_value.m_string : 0; }
private:
IdentifierRep(int number)
: m_isString(false)
{
m_value.m_number = number;
}
IdentifierRep(const char* name)
: m_isString(true)
{
m_value.m_string = strdup(name);
}
~IdentifierRep()
{
// IdentifierReps should never be deleted.
ASSERT_NOT_REACHED();
}
union {
const char* m_string;
int m_number;
} m_value;
bool m_isString;
};
} // namespace WebCore
#endif // IdentifierRep_h
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