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88 lines
2.4 KiB
88 lines
2.4 KiB
3 years ago
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///////////////////////////////////////////////////////////////////////////////
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// range_matcher.hpp
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//
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// Copyright 2008 Eric Niebler. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_RANGE_MATCHER_HPP_EAN_10_04_2005
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#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_RANGE_MATCHER_HPP_EAN_10_04_2005
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// MS compatible compilers support #pragma once
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#if defined(_MSC_VER)
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# pragma once
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# pragma warning(push)
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# pragma warning(disable : 4100) // unreferenced formal parameter
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#endif
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#include <boost/mpl/bool.hpp>
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#include <boost/xpressive/detail/detail_fwd.hpp>
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#include <boost/xpressive/detail/core/quant_style.hpp>
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#include <boost/xpressive/detail/core/state.hpp>
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namespace boost { namespace xpressive { namespace detail
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{
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///////////////////////////////////////////////////////////////////////////////
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// range_matcher
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//
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template<typename Traits, typename ICase>
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struct range_matcher
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: quant_style_fixed_width<1>
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{
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typedef typename Traits::char_type char_type;
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typedef ICase icase_type;
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char_type ch_min_;
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char_type ch_max_;
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bool not_;
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range_matcher(char_type ch_min, char_type ch_max, bool no, Traits const &)
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: ch_min_(ch_min)
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, ch_max_(ch_max)
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, not_(no)
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{
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}
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void inverse()
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{
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this->not_ = !this->not_;
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}
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bool in_range(Traits const &tr, char_type ch, mpl::false_) const // case-sensitive
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{
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return tr.in_range(this->ch_min_, this->ch_max_, ch);
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}
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bool in_range(Traits const &tr, char_type ch, mpl::true_) const // case-insensitive
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{
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return tr.in_range_nocase(this->ch_min_, this->ch_max_, ch);
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}
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template<typename BidiIter, typename Next>
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bool match(match_state<BidiIter> &state, Next const &next) const
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{
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if(state.eos() || this->not_ ==
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this->in_range(traits_cast<Traits>(state), *state.cur_, icase_type()))
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{
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return false;
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}
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++state.cur_;
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if(next.match(state))
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{
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return true;
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}
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--state.cur_;
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return false;
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}
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};
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}}}
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#if defined(_MSC_VER)
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# pragma warning(pop)
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#endif
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#endif
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