1 ///////////////////////////////////////////////////////////////////////////////
2 // any_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_ANY_MATCHER_HPP_EAN_10_04_2005
9 #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_ANY_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     // any_matcher
25     //
26     struct any_matcher
27     {
28         BOOST_XPR_QUANT_STYLE(quant_fixed_width, 1, true)
29 
30         template<typename BidiIter, typename Next>
matchboost::xpressive::detail::any_matcher31         static bool match(match_state<BidiIter> &state, Next const &next)
32         {
33             if(state.eos())
34             {
35                 return false;
36             }
37 
38             ++state.cur_;
39             if(next.match(state))
40             {
41                 return true;
42             }
43 
44             --state.cur_;
45             return false;
46         }
47     };
48 
49 }}}
50 
51 #endif
52