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Improve vector value_at performance.

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This commit is contained in:
Kohei Takahashi
2017-10-07 14:18:29 +09:00
parent 24d1c7fd1a
commit e606ceeff0
2 changed files with 9 additions and 9 deletions
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14
include/boost/fusion/container/vector/detail/value_at_impl.hpp
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@ -23,7 +23,6 @@
///////////////////////////////////////////////////////////////////////////////
#include <boost/fusion/container/vector/vector_fwd.hpp>
#include <boost/type_traits/declval.hpp>
#include <boost/type_traits/remove_cv.hpp>
namespace boost { namespace fusion
{
@ -31,8 +30,12 @@ namespace boost { namespace fusion
namespace vector_detail
{
template <typename I, typename ...T>
struct vector_data;
template <std::size_t I, typename T>
struct store;
template <std::size_t N, typename U>
static inline BOOST_FUSION_GPU_ENABLED
U value_at_impl(store<N, U> const volatile*);
}
namespace extension
@ -46,8 +49,9 @@ namespace boost { namespace fusion
template <typename Sequence, typename N>
struct apply
{
typedef typename boost::remove_cv<Sequence>::type seq;
typedef typename mpl::identity<decltype(seq::template value_at_impl<N::value>(boost::declval<seq*>()))>::type::type type;
typedef
decltype(vector_detail::value_at_impl<N::value>(boost::declval<Sequence*>()))
type;
};
};
}

4
include/boost/fusion/container/vector/vector.hpp
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@ -258,10 +258,6 @@ namespace boost { namespace fusion
{
return at_detail<J::value>(this);
}
template <std::size_t N, typename U>
static BOOST_FUSION_GPU_ENABLED
mpl::identity<U> value_at_impl(store<N, U>*);
};
} // namespace boost::fusion::vector_detail