ceph/src/boost/libs/xpressive/include/boost/xpressive/detail/core/matcher/assert_bos_matcher.hpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // assert_bos_matcher.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_CORE_MATCHER_ASSERT_BOS_MATCHER_HPP_EAN_10_04_2005
   9 #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_ASSERT_BOS_MATCHER_HPP_EAN_10_04_2005
  10
  11 // MS compatible compilers support #pragma once
  12 #if defined(_MSC_VER)
  13 # pragma once
  14 #endif
  15
  16 #include <boost/xpressive/detail/detail_fwd.hpp>
  17 #include <boost/xpressive/detail/core/quant_style.hpp>
  18 #include <boost/xpressive/detail/core/state.hpp>
  19
  20 namespace boost { namespace xpressive { namespace detail
  21 {
  22
  23     ///////////////////////////////////////////////////////////////////////////////
  24     // assert_bos_matcher
  25     //   match the beginning of the sequence (\A)
  26     struct assert_bos_matcher
  27     {
  28         BOOST_XPR_QUANT_STYLE(quant_none, 0, true)
  29
  30         template<typename BidiIter, typename Next>
  31         static bool match(match_state<BidiIter> &state, Next const &next)
  32         {
  33             return state.bos() && next.match(state);
  34         }
  35     };
  36
  37 }}}
  38
  39 #endif