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/**
* @copyright
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
* @endcopyright
*/
#ifndef __cplusplus
#error "This is a C++ header file."
#endif
#ifndef SVN_CXXHL_TRISTATE_HPP
#define SVN_CXXHL_TRISTATE_HPP
namespace subversion {
namespace cxxhl {
namespace version_1_9_dev {
class tristate
{
public:
static const tristate TRUE;
static const tristate FALSE;
static const tristate UNKNOWN;
tristate(const tristate& that) throw()
: m_value(that.m_value)
{}
bool operator==(const tristate& that) const throw()
{ return m_value == that.m_value; }
bool operator!=(const tristate& that) const throw()
{ return !(*this == that); }
bool known() const throw()
{ return *this != UNKNOWN; }
private:
explicit tristate(short int value) throw();
short int m_value;
};
} // namespace version_1_9_dev
} // namespace cxxhl
} // namespace subversion
#endif // SVN_CXXHL_TRISTATE_HPP
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