| /////////////////////////////////////////////////////////////////////////////// |
| // literal_matcher.hpp |
| // |
| // Copyright 2008 Eric Niebler. Distributed under the Boost |
| // Software License, Version 1.0. (See accompanying file |
| // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| |
| #ifndef BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_LITERAL_MATCHER_HPP_EAN_10_04_2005 |
| #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_LITERAL_MATCHER_HPP_EAN_10_04_2005 |
| |
| // MS compatible compilers support #pragma once |
| #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| # pragma once |
| #endif |
| |
| #include <boost/xpressive/detail/detail_fwd.hpp> |
| #include <boost/xpressive/detail/core/quant_style.hpp> |
| #include <boost/xpressive/detail/core/state.hpp> |
| #include <boost/xpressive/detail/utility/traits_utils.hpp> |
| |
| namespace boost { namespace xpressive { namespace detail |
| { |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // literal_matcher |
| // |
| template<typename Traits, typename ICase, typename Not> |
| struct literal_matcher |
| : quant_style_fixed_width<1> |
| { |
| typedef typename Traits::char_type char_type; |
| typedef Not not_type; |
| typedef ICase icase_type; |
| char_type ch_; |
| |
| explicit literal_matcher(char_type ch) |
| : ch_(ch) |
| {} |
| |
| literal_matcher(char_type ch, Traits const &tr) |
| : ch_(detail::translate(ch, tr, icase_type())) |
| {} |
| |
| template<typename BidiIter, typename Next> |
| bool match(match_state<BidiIter> &state, Next const &next) const |
| { |
| if(state.eos() || Not::value == |
| (detail::translate(*state.cur_, traits_cast<Traits>(state), icase_type()) == this->ch_)) |
| { |
| return false; |
| } |
| |
| ++state.cur_; |
| if(next.match(state)) |
| { |
| return true; |
| } |
| |
| --state.cur_; |
| return false; |
| } |
| }; |
| |
| }}} |
| |
| #endif |