/Src/Dependencies/Boost/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) && (_MSC_VER >= 1020)
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
20namespace 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