/Src/Dependencies/Boost/boost/proto/functional/fusion/push_back.hpp

 1///////////////////////////////////////////////////////////////////////////////
 2/// \file push_back.hpp
 3/// Proto callables Fusion push_back
 4//
 5//  Copyright 2010 Eric Niebler. Distributed under the Boost
 6//  Software License, Version 1.0. (See accompanying file
 7//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 8
 9#ifndef BOOST_PROTO_FUNCTIONAL_FUSION_PUSH_BACK_HPP_EAN_11_27_2010
10#define BOOST_PROTO_FUNCTIONAL_FUSION_PUSH_BACK_HPP_EAN_11_27_2010
11
12#include <boost/type_traits/add_const.hpp>
13#include <boost/type_traits/remove_const.hpp>
14#include <boost/type_traits/remove_reference.hpp>
15#include <boost/fusion/include/push_back.hpp>
16#include <boost/proto/proto_fwd.hpp>
17
18namespace boost { namespace proto { namespace functional
19{
20    /// \brief A PolymorphicFunctionObject type that invokes the
21    /// \c fusion::push_back() algorithm on its argument.
22    ///
23    /// A PolymorphicFunctionObject type that invokes the
24    /// \c fusion::push_back() algorithm on its argument.
25    struct push_back
26    {
27        BOOST_PROTO_CALLABLE()
28
29        template<typename Sig>
30        struct result;
31
32        template<typename This, typename Seq, typename T>
33        struct result<This(Seq, T)>
34          : fusion::result_of::push_back<
35                typename boost::add_const<typename boost::remove_reference<Seq>::type>::type
36              , typename boost::remove_const<typename boost::remove_reference<T>::type>::type
37            >
38        {};
39
40        template<typename Seq, typename T>
41        typename fusion::result_of::push_back<Seq const, T>::type
42        operator ()(Seq const &seq, T const &t) const
43        {
44            return fusion::push_back(seq, t);
45        }
46    };
47}}}
48
49#endif