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/*=============================================================================
Copyright (c) 2001-2011 Joel de Guzman
Copyright (c) 2006 Tobias Schwinger
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)
==============================================================================*/
#if !defined(FUSION_PAIR_07222005_1203)
#define FUSION_PAIR_07222005_1203
#include <boost/fusion/support/config.hpp>
#include <iosfwd>
#include <boost/fusion/support/detail/access.hpp>
#include <boost/fusion/support/detail/as_fusion_element.hpp>
#include <boost/config.hpp>
#include <boost/utility/enable_if.hpp>
#include <boost/type_traits/is_convertible.hpp>
#include <boost/type_traits/is_lvalue_reference.hpp>
#if defined (BOOST_MSVC)
# pragma warning(push)
# pragma warning (disable: 4512) // assignment operator could not be generated.
#endif
namespace boost { namespace fusion
{
// A half runtime pair where the first type does not have data
template <typename First, typename Second>
struct pair
{
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair()
: second() {}
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair(pair const& rhs)
: second(rhs.second) {}
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair(pair&& rhs)
: second(BOOST_FUSION_FWD_ELEM(Second, rhs.second)) {}
#endif
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair(typename detail::call_param<Second>::type val)
: second(val) {}
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
template <typename Second2>
BOOST_FUSION_GPU_ENABLED
pair(Second2&& val
, typename boost::disable_if<is_lvalue_reference<Second2> >::type* /* dummy */ = 0
, typename boost::enable_if<is_convertible<Second2, Second> >::type* /*dummy*/ = 0
) : second(BOOST_FUSION_FWD_ELEM(Second, val)) {}
#endif
template <typename Second2>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair(pair<First, Second2> const& rhs)
: second(rhs.second) {}
template <typename Second2>
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair& operator=(pair<First, Second2> const& rhs)
{
second = rhs.second;
return *this;
}
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair& operator=(pair const& rhs)
{
second = rhs.second;
return *this;
}
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair& operator=(pair&& rhs)
{
second = BOOST_FUSION_FWD_ELEM(Second, rhs.second);
return *this;
}
#endif
typedef First first_type;
typedef Second second_type;
Second second;
};
namespace result_of
{
template<typename First, typename Second>
struct make_pair
{
typedef fusion::pair<First,
typename detail::as_fusion_element<Second>::type> type;
};
template<class Pair>
struct first
{
typedef typename Pair::first_type type;
};
template<class Pair>
struct second
{
typedef typename Pair::second_type type;
};
}
template <typename First, typename Second>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline typename result_of::make_pair<First,Second>::type
make_pair(Second const& val)
{
return pair<First, typename detail::as_fusion_element<Second>::type>(val);
}
template <typename First, typename Second>
inline std::ostream&
operator<<(std::ostream& os, pair<First, Second> const& p)
{
os << p.second;
return os;
}
template <typename First, typename Second>
inline std::istream&
operator>>(std::istream& is, pair<First, Second>& p)
{
is >> p.second;
return is;
}
template <typename First, typename SecondL, typename SecondR>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline bool
operator==(pair<First, SecondL> const& l, pair<First, SecondR> const& r)
{
return l.second == r.second;
}
template <typename First, typename SecondL, typename SecondR>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline bool
operator!=(pair<First, SecondL> const& l, pair<First, SecondR> const& r)
{
return l.second != r.second;
}
template <typename First, typename SecondL, typename SecondR>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline bool
operator<(pair<First, SecondL> const& l, pair<First, SecondR> const& r)
{
return l.second < r.second;
}
}}
#if defined (BOOST_MSVC)
# pragma warning(pop)
#endif
#endif
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