| /////////////////////////////////////////////////////////////////////////////// |
| // range_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_RANGE_MATCHER_HPP_EAN_10_04_2005 |
| #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_RANGE_MATCHER_HPP_EAN_10_04_2005 |
| |
| // MS compatible compilers support #pragma once |
| #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| # pragma once |
| # pragma warning(push) |
| # pragma warning(disable : 4100) // unreferenced formal parameter |
| #endif |
| |
| #include <boost/mpl/bool.hpp> |
| #include <boost/xpressive/detail/detail_fwd.hpp> |
| #include <boost/xpressive/detail/core/quant_style.hpp> |
| #include <boost/xpressive/detail/core/state.hpp> |
| |
| namespace boost { namespace xpressive { namespace detail |
| { |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // range_matcher |
| // |
| template<typename Traits, typename ICase> |
| struct range_matcher |
| : quant_style_fixed_width<1> |
| { |
| typedef typename Traits::char_type char_type; |
| typedef ICase icase_type; |
| char_type ch_min_; |
| char_type ch_max_; |
| bool not_; |
| |
| range_matcher(char_type ch_min, char_type ch_max, bool no, Traits const &) |
| : ch_min_(ch_min) |
| , ch_max_(ch_max) |
| , not_(no) |
| { |
| } |
| |
| void inverse() |
| { |
| this->not_ = !this->not_; |
| } |
| |
| bool in_range(Traits const &tr, char_type ch, mpl::false_) const // case-sensitive |
| { |
| return tr.in_range(this->ch_min_, this->ch_max_, ch); |
| } |
| |
| bool in_range(Traits const &tr, char_type ch, mpl::true_) const // case-insensitive |
| { |
| return tr.in_range_nocase(this->ch_min_, this->ch_max_, ch); |
| } |
| |
| template<typename BidiIter, typename Next> |
| bool match(match_state<BidiIter> &state, Next const &next) const |
| { |
| if(state.eos() || this->not_ == |
| this->in_range(traits_cast<Traits>(state), *state.cur_, icase_type())) |
| { |
| return false; |
| } |
| |
| ++state.cur_; |
| if(next.match(state)) |
| { |
| return true; |
| } |
| |
| --state.cur_; |
| return false; |
| } |
| }; |
| |
| }}} |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| # pragma warning(pop) |
| #endif |
| |
| #endif |