1 /*============================================================================= 2 Copyright (c) 2001-2011 Joel de Guzman 3 4 Distributed under the Boost Software License, Version 1.0. (See accompanying 5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 6 ==============================================================================*/ 7 #if !defined(FUSION_BEGIN_IMPL_05062005_1226) 8 #define FUSION_BEGIN_IMPL_05062005_1226 9 10 #include <boost/fusion/support/config.hpp> 11 12 namespace boost { namespace fusion 13 { 14 struct iterator_range_tag; 15 16 namespace extension 17 { 18 template <typename Tag> 19 struct begin_impl; 20 21 template <> 22 struct begin_impl<iterator_range_tag> 23 { 24 template <typename Sequence> 25 struct apply 26 { 27 typedef typename Sequence::begin_type type; 28 29 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED 30 static type callboost::fusion::extension::begin_impl::apply31 call(Sequence& s) 32 { 33 return s.first; 34 } 35 }; 36 }; 37 } 38 }} 39 40 #endif 41 42 43