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Make fusion::pair trivially copyable if possible

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This commit is contained in:
Kohei Takahashi
2018-03-23 02:26:05 +09:00
parent 44ef9e56e6
commit 4e57acbce7
1 changed files with 24 additions and 31 deletions
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55
include/boost/fusion/support/pair.hpp
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@ -8,15 +8,16 @@
#if !defined(FUSION_PAIR_07222005_1203) #if !defined(FUSION_PAIR_07222005_1203)
#define FUSION_PAIR_07222005_1203 #define FUSION_PAIR_07222005_1203
#include <boost/fusion/support/config.hpp>
#include <iosfwd> #include <iosfwd>
#include <utility>
#include <boost/fusion/support/config.hpp>
#include <boost/fusion/support/detail/access.hpp> #include <boost/fusion/support/detail/access.hpp>
#include <boost/fusion/support/detail/as_fusion_element.hpp> #include <boost/fusion/support/detail/as_fusion_element.hpp>
#include <boost/config.hpp> #include <boost/fusion/support/detail/enabler.hpp>
#include <boost/utility/enable_if.hpp> #include <boost/core/enable_if.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/is_convertible.hpp> #include <boost/type_traits/is_convertible.hpp>
#include <boost/type_traits/is_lvalue_reference.hpp> #include <boost/type_traits/remove_cv_ref.hpp>
#if defined (BOOST_MSVC) #if defined (BOOST_MSVC)
# pragma warning(push) # pragma warning(push)
@ -33,54 +34,46 @@ namespace boost { namespace fusion
pair() pair()
: second() {} : 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 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair(typename detail::call_param<Second>::type val) pair(typename detail::call_param<Second>::type val)
: second(val) {} : second(val) {}
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
template <typename Second2>
BOOST_FUSION_GPU_ENABLED BOOST_FUSION_GPU_ENABLED
pair(Second2&& val pair(typename remove_cv_ref<Second>::type&& val)
, typename boost::disable_if<is_lvalue_reference<Second2> >::type* /* dummy */ = 0 : second(BOOST_FUSION_FWD_ELEM(Second, val)) {}
, typename boost::enable_if<is_convertible<Second2, Second> >::type* /*dummy*/ = 0
) : second(BOOST_FUSION_FWD_ELEM(Second, val)) {}
#endif #endif
template <typename Second2> template <typename Second2>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair(pair<First, Second2> const& rhs) pair(pair<First, Second2> const& rhs,
typename disable_if<is_same<Second, Second2>, detail::enabler_>::type = detail::enabler,
typename enable_if<is_convertible<Second2, Second>, detail::enabler_>::type = detail::enabler)
: second(rhs.second) {} : second(rhs.second) {}
template <typename Second2> template <typename Second2>
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair& operator=(pair<First, Second2> const& rhs) typename disable_if<is_same<Second, Second2>, pair&>::type
{ 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; second = rhs.second;
return *this; return *this;
} }
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
template <typename Second2>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair(pair<First, Second2>&& rhs,
typename disable_if<is_same<Second, Second2>, detail::enabler_>::type = detail::enabler,
typename enable_if<is_convertible<Second2, Second>, detail::enabler_>::type = detail::enabler)
: second(std::move(rhs.second)) {}
template <typename Second2>
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
pair& operator=(pair&& rhs) typename disable_if<is_same<Second, Second2>, pair&>::type
operator=(pair<First, Second2>&& rhs)
{ {
second = BOOST_FUSION_FWD_ELEM(Second, rhs.second); second = std::move(rhs.second);
return *this; return *this;
} }
#endif #endif