/Src/Dependencies/Boost/boost/xpressive/detail/core/matcher/attr_end_matcher.hpp

 1///////////////////////////////////////////////////////////////////////////////
 2// attr_end_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_ATTR_END_MATCHER_HPP_EAN_06_09_2007
 9#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_ATTR_END_MATCHER_HPP_EAN_06_09_2007
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    // attr_end_matcher
25    //
26    struct attr_end_matcher
27      : quant_style<quant_none, 0, false>
28    {
29        template<typename BidiIter, typename Next>
30        static bool match(match_state<BidiIter> &state, Next const &next)
31        {
32            attr_context old_attr_context = state.attr_context_;
33            state.attr_context_ = *old_attr_context.prev_attr_context_;
34
35            if(next.match(state))
36            {
37                return true;
38            }
39
40            state.attr_context_ = old_attr_context;
41            return false;
42        }
43    };
44
45}}}
46
47#endif