mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-23 13:22:02 +03:00
57 lines
1.8 KiB
C++
57 lines
1.8 KiB
C++
///////////////////////////////////////////////////////////////////////////////
|
|
/// \file at.hpp
|
|
/// Proto callables Fusion at
|
|
//
|
|
// Copyright 2010 Eric Niebler. 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 BOOST_PROTO_FUNCTIONAL_FUSION_AT_HPP_EAN_11_27_2010
|
|
#define BOOST_PROTO_FUNCTIONAL_FUSION_AT_HPP_EAN_11_27_2010
|
|
|
|
#include <boost/type_traits/add_const.hpp>
|
|
#include <boost/type_traits/remove_const.hpp>
|
|
#include <boost/type_traits/remove_reference.hpp>
|
|
#include <boost/fusion/include/at.hpp>
|
|
#include <boost/proto/proto_fwd.hpp>
|
|
|
|
namespace boost { namespace proto { namespace functional
|
|
{
|
|
/// \brief A PolymorphicFunctionObject type that invokes the
|
|
/// \c fusion::at() accessor on its argument.
|
|
///
|
|
/// A PolymorphicFunctionObject type that invokes the
|
|
/// \c fusion::at() accessor on its argument.
|
|
struct at
|
|
{
|
|
BOOST_PROTO_CALLABLE()
|
|
|
|
template<typename Sig>
|
|
struct result;
|
|
|
|
template<typename This, typename Seq, typename N>
|
|
struct result<This(Seq, N)>
|
|
: fusion::result_of::at<
|
|
typename boost::remove_reference<Seq>::type
|
|
, typename boost::remove_const<typename boost::remove_reference<N>::type>::type
|
|
>
|
|
{};
|
|
|
|
template<typename Seq, typename N>
|
|
typename fusion::result_of::at<Seq, N>::type
|
|
operator ()(Seq &seq, N const & BOOST_PROTO_DISABLE_IF_IS_CONST(Seq)) const
|
|
{
|
|
return fusion::at<N>(seq);
|
|
}
|
|
|
|
template<typename Seq, typename N>
|
|
typename fusion::result_of::at<Seq const, N>::type
|
|
operator ()(Seq const &seq, N const &) const
|
|
{
|
|
return fusion::at<N>(seq);
|
|
}
|
|
};
|
|
}}}
|
|
|
|
#endif
|