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- ///////////////////////////////////////////////////////////////////////////////
- // 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)
- # 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)
- # pragma warning(pop)
- #endif
- #endif
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