support/detail/as_fusion_element.hpp

0001 /*=============================================================================
0002     Copyright (c) 1999-2003 Jaakko Jarvi
0003     Copyright (c) 2001-2011 Joel de Guzman
0004
0005     Distributed under the Boost Software License, Version 1.0. (See accompanying
0006     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0007 ==============================================================================*/
0008 #if !defined(FUSION_AS_FUSION_ELEMENT_05052005_0338)
0009 #define FUSION_AS_FUSION_ELEMENT_05052005_0338
0010
0011 #include <boost/fusion/support/config.hpp>
0012 #include <boost/core/ref.hpp>
0013
0014 #ifndef BOOST_NO_CXX11_HDR_FUNCTIONAL
0015 #include <functional>
0016 #endif
0017
0018 namespace boost { namespace fusion { namespace detail
0019 {
0020     template <typename T>
0021     struct as_fusion_element
0022     {
0023         typedef T type;
0024     };
0025
0026     template <typename T>
0027     struct as_fusion_element<reference_wrapper<T> >
0028     {
0029         typedef T& type;
0030     };
0031
0032 #ifndef BOOST_NO_CXX11_HDR_FUNCTIONAL
0033     template <typename T>
0034     struct as_fusion_element<std::reference_wrapper<T> >
0035     {
0036         typedef T& type;
0037     };
0038 #endif
0039
0040     template <typename T, int N>
0041     struct as_fusion_element<T[N]>
0042     {
0043         typedef const T(&type)[N];
0044     };
0045
0046     template <typename T, int N>
0047     struct as_fusion_element<volatile T[N]>
0048     {
0049         typedef const volatile T(&type)[N];
0050     };
0051
0052     template <typename T, int N>
0053     struct as_fusion_element<const volatile T[N]>
0054     {
0055         typedef const volatile T(&type)[N];
0056     };
0057
0058 }}}
0059
0060 #endif