deps/boost_1_63_0/boost/fusion/algorithm/transformation/pop_front.hpp

   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_POP_FRONT_09172005_1115)
   8 #define FUSION_POP_FRONT_09172005_1115
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/fusion/view/iterator_range/iterator_range.hpp>
  12 #include <boost/fusion/sequence/intrinsic/begin.hpp>
  13 #include <boost/fusion/sequence/intrinsic/end.hpp>
  14 #include <boost/fusion/iterator/next.hpp>
  15
  16 namespace boost { namespace fusion
  17 {
  18     namespace result_of
  19     {
  20         template <typename Sequence>
  21         struct pop_front
  22         {
  23             typedef
  24                 iterator_range<
  25                     typename next<
  26                         typename begin<Sequence>::type
  27                     >::type
  28                   , typename end<Sequence>::type
  29                 >
  30             type;
  31         };
  32     }
  33
  34     template <typename Sequence>
  35     BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  36     inline typename result_of::pop_front<Sequence const>::type
  37     pop_front(Sequence const& seq)
  38     {
  39         typedef typename result_of::pop_front<Sequence const>::type result;
  40         return result(fusion::next(fusion::begin(seq)), fusion::end(seq));
  41     }
  42 }}
  43
  44 #endif
  45