63e88f80
 Hu Chunming
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/*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*
* Copyright (c) 2020-2021 Andrey Semashev
*/
/*!
* \file atomic/detail/classify.hpp
*
* This header contains type traits for type classification.
*/
#ifndef BOOST_ATOMIC_DETAIL_CLASSIFY_HPP_INCLUDED_
#define BOOST_ATOMIC_DETAIL_CLASSIFY_HPP_INCLUDED_
#include <boost/atomic/detail/config.hpp>
#include <boost/atomic/detail/type_traits/is_enum.hpp>
#include <boost/atomic/detail/type_traits/is_integral.hpp>
#include <boost/atomic/detail/type_traits/is_function.hpp>
#include <boost/atomic/detail/type_traits/is_floating_point.hpp>
#include <boost/atomic/detail/header.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
namespace boost {
namespace atomics {
namespace detail {
template< typename T, bool IsFunction = atomics::detail::is_function< T >::value >
struct classify_pointer
{
typedef void* type;
};
template< typename T >
struct classify_pointer< T, true >
{
typedef void type;
};
template<
typename T,
bool IsInt = atomics::detail::is_integral< T >::value,
bool IsFloat = atomics::detail::is_floating_point< T >::value,
bool IsEnum = atomics::detail::is_enum< T >::value
>
struct classify
{
typedef void type;
};
template< typename T >
struct classify< T, true, false, false > { typedef int type; };
#if !defined(BOOST_ATOMIC_NO_FLOATING_POINT)
template< typename T >
struct classify< T, false, true, false > { typedef float type; };
#endif
template< typename T >
struct classify< T, false, false, true > { typedef const int type; };
template< typename T >
struct classify< T*, false, false, false > { typedef typename classify_pointer< T >::type type; };
template< >
struct classify< void*, false, false, false > { typedef void type; };
template< >
struct classify< const void*, false, false, false > { typedef void type; };
template< >
struct classify< volatile void*, false, false, false > { typedef void type; };
template< >
struct classify< const volatile void*, false, false, false > { typedef void type; };
template< typename T, typename U >
struct classify< T U::*, false, false, false > { typedef void type; };
} // namespace detail
} // namespace atomics
} // namespace boost
#include <boost/atomic/detail/footer.hpp>
#endif // BOOST_ATOMIC_DETAIL_CLASSIFY_HPP_INCLUDED_
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