/*=============================================================================
|
Copyright (c) 2014,2018 Kohei Takahashi
|
|
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)
|
==============================================================================*/
|
#ifndef FUSION_VALUE_AT_IMPL_16122014_1641
|
#define FUSION_VALUE_AT_IMPL_16122014_1641
|
|
#include <boost/fusion/support/config.hpp>
|
#include <boost/fusion/container/vector/detail/config.hpp>
|
|
///////////////////////////////////////////////////////////////////////////////
|
// Without variadics, we will use the PP version
|
///////////////////////////////////////////////////////////////////////////////
|
#if !defined(BOOST_FUSION_HAS_VARIADIC_VECTOR)
|
# include <boost/fusion/container/vector/detail/cpp03/value_at_impl.hpp>
|
#else
|
|
///////////////////////////////////////////////////////////////////////////////
|
// C++11 interface
|
///////////////////////////////////////////////////////////////////////////////
|
#include <boost/fusion/container/vector/vector_fwd.hpp>
|
#include <boost/type_traits/declval.hpp>
|
#include <boost/mpl/identity.hpp>
|
|
namespace boost { namespace fusion
|
{
|
struct vector_tag;
|
|
namespace vector_detail
|
{
|
template <std::size_t I, typename T>
|
struct store;
|
|
template <std::size_t N, typename U>
|
static inline BOOST_FUSION_GPU_ENABLED
|
mpl::identity<U> value_at_impl(store<N, U> const volatile*);
|
}
|
|
namespace extension
|
{
|
template <typename Tag>
|
struct value_at_impl;
|
|
template <>
|
struct value_at_impl<vector_tag>
|
{
|
template <typename Sequence, typename N>
|
struct apply : BOOST_FUSION_DECLTYPE_N3031((
|
vector_detail::value_at_impl<N::value>(boost::declval<Sequence*>())
|
))
|
{};
|
};
|
}
|
}}
|
|
#endif
|
#endif
|
