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)
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     // attr_end_matcher
25     //
26     struct attr_end_matcher
27       : quant_style<quant_none, 0, false>
28     {
29         template<typename BidiIter, typename Next>
matchboost::xpressive::detail::attr_end_matcher30         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
48