ceph/src/boost/libs/xpressive/include/boost/xpressive/detail/static/transforms/as_sequence.hpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // as_sequence.hpp
   3 //
   4 //  Copyright 2008 Eric Niebler. Distributed under the Boost
   5 //  Software License, Version 1.0. (See accompanying file
   6 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7
   8 #ifndef BOOST_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_SEQUENCE_HPP_EAN_04_01_2007
   9 #define BOOST_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_SEQUENCE_HPP_EAN_04_01_2007
  10
  11 // MS compatible compilers support #pragma once
  12 #if defined(_MSC_VER)
  13 # pragma once
  14 #endif
  15
  16 #include <boost/mpl/assert.hpp>
  17 #include <boost/type_traits/is_same.hpp>
  18 #include <boost/xpressive/detail/detail_fwd.hpp>
  19 #include <boost/xpressive/detail/static/static.hpp>
  20
  21 namespace boost { namespace xpressive { namespace grammar_detail
  22 {
  23     template<typename Grammar, typename Callable = proto::callable>
  24     struct in_sequence : proto::transform<in_sequence<Grammar, Callable> >
  25     {
  26         template<typename Expr, typename State, typename Data>
  27         struct impl : proto::transform_impl<Expr, State, Data>
  28         {
  29             typedef
  30                 detail::static_xpression<
  31                     typename Grammar::template impl<Expr, State, Data>::result_type
  32                   , State
  33                 >
  34             result_type;
  35
  36             result_type operator ()(
  37                 typename impl::expr_param expr
  38               , typename impl::state_param state
  39               , typename impl::data_param data
  40             ) const
  41             {
  42                 return result_type(
  43                     typename Grammar::template impl<Expr, State, Data>()(expr, state, data)
  44                   , state
  45                 );
  46             }
  47         };
  48     };
  49
  50 }}}
  51
  52 #endif