///////////////////////////////////////////////////////////////////////////////
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// posix_charset_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_POSIX_CHARSET_MATCHER_HPP_EAN_10_04_2005
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#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_POSIX_CHARSET_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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#endif
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#include <boost/assert.hpp>
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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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#include <boost/xpressive/detail/utility/traits_utils.hpp>
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namespace boost { namespace xpressive { namespace detail
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{
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///////////////////////////////////////////////////////////////////////////////
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// posix_charset_matcher
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//
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template<typename Traits>
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struct posix_charset_matcher
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: quant_style_fixed_width<1>
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{
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typedef Traits traits_type;
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typedef typename Traits::char_class_type char_class_type;
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posix_charset_matcher(char_class_type m, bool no)
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: not_(no)
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, mask_(m)
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{
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BOOST_ASSERT(0 != this->mask_);
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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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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_ == traits_cast<Traits>(state).isctype(
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*state.cur_, this->mask_))
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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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bool not_;
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char_class_type mask_;
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};
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}}}
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#endif
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