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101 lines
2.6 KiB
101 lines
2.6 KiB
3 years ago
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///////////////////////////////////////////////////////////////////////////////
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// set.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_SET_HPP_EAN_10_04_2005
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#define BOOST_XPRESSIVE_DETAIL_SET_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 : 4127) // conditional expression constant
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# pragma warning(disable : 4100) // unreferenced formal parameter
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# pragma warning(disable : 4351) // vc8 new behavior: elements of array 'foo' will be default initialized
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#endif
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#include <algorithm>
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#include <boost/mpl/assert.hpp>
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#include <boost/type_traits/same_traits.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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// set_matcher
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//
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template<typename Traits, typename Size>
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struct set_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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char_type set_[ Size::value ];
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bool not_;
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bool icase_;
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set_matcher()
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: set_()
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, not_(false)
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, icase_(false)
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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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void nocase(Traits const &tr)
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{
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this->icase_ = true;
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for(int i = 0; i < Size::value; ++i)
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{
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this->set_[i] = tr.translate_nocase(this->set_[i]);
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}
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}
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bool in_set(Traits const &tr, char_type ch) const
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{
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char_type const *begin = &this->set_[0], *end = begin + Size::value;
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ch = this->icase_ ? tr.translate_nocase(ch) : tr.translate(ch);
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return end != std::find(begin, end, 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_ == this->in_set(traits_cast<Traits>(state), *state.cur_))
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{
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return false;
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}
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if(++state.cur_, next.match(state))
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{
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return true;
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}
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return --state.cur_, false;
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}
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};
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///////////////////////////////////////////////////////////////////////////////
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// set_initializer
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struct set_initializer
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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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}}} // namespace boost::xpressive::detail
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#endif
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