list/detail/value_of_impl.hpp

0001 /*=============================================================================
0002     Copyright (c) 2001-2011 Joel de Guzman
0003     Copyright (c) 2005 Eric Niebler
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_VALUE_OF_IMPL_07172005_0838)
0009 #define FUSION_VALUE_OF_IMPL_07172005_0838
0010
0011 namespace boost { namespace fusion
0012 {
0013     struct cons_iterator_tag;
0014
0015     namespace extension
0016     {
0017         template <typename Tag>
0018         struct value_of_impl;
0019
0020         template <>
0021         struct value_of_impl<cons_iterator_tag>
0022         {
0023             template <typename Iterator>
0024             struct apply
0025             {
0026                 typedef typename Iterator::cons_type cons_type;
0027                 typedef typename cons_type::car_type type;
0028             };
0029         };
0030     }
0031
0032 }}
0033
0034 #endif
0035
0036