hash.hpp
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| 2.2 KiB
| text/x-c++hdr
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CppLexer
r4 | #ifndef OPAQUE_HASH_HPP | |||
#define OPAQUE_HASH_HPP | ||||
// | ||||
// Copyright (c) 2016 | ||||
// Kyle Markley. 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. | ||||
// 3. Neither the name of the author nor the names of any contributors may be | ||||
// used to endorse or promote products derived from this software without | ||||
// specific prior written permission. | ||||
// | ||||
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER 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. | ||||
// | ||||
#include "data.hpp" | ||||
#include <functional> | ||||
/// \addtogroup miscellaneous | ||||
/// @{ | ||||
/// | ||||
/// Create a std::hash specialization for an opaque typedef | ||||
/// | ||||
/// This macro must be used outside any namespace, because it creates a | ||||
/// specialization in std. | ||||
/// | ||||
#define OPAQUE_HASHABLE(name) \ | ||||
namespace std {\ | ||||
template <> struct hash<name> {\ | ||||
using argument_type = typename name::opaque_type;\ | ||||
using result_type = size_t;\ | ||||
result_type operator()(const argument_type& key) const {\ | ||||
return std::hash<typename name::underlying_type>{}(key.value);\ | ||||
}\ | ||||
};\ | ||||
} | ||||
/// @} | ||||
#endif | ||||