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- ///////////////////////////////////////////////////////////////////////////////
- // string_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_STRING_MATCHER_HPP_EAN_10_04_2005
- #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_STRING_MATCHER_HPP_EAN_10_04_2005
- // MS compatible compilers support #pragma once
- #if defined(_MSC_VER)
- # pragma once
- #endif
- #include <string>
- #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>
- #include <boost/xpressive/detail/utility/algorithm.hpp>
- #include <boost/xpressive/detail/utility/traits_utils.hpp>
- namespace boost { namespace xpressive { namespace detail
- {
- ///////////////////////////////////////////////////////////////////////////////
- // string_matcher
- //
- template<typename Traits, typename ICase>
- struct string_matcher
- : quant_style_fixed_unknown_width
- {
- typedef typename Traits::char_type char_type;
- typedef typename Traits::string_type string_type;
- typedef ICase icase_type;
- string_type str_;
- char_type const *end_;
- string_matcher(string_type const &str, Traits const &tr)
- : str_(str)
- , end_()
- {
- typename range_iterator<string_type>::type cur = boost::begin(this->str_);
- typename range_iterator<string_type>::type end = boost::end(this->str_);
- for(; cur != end; ++cur)
- {
- *cur = detail::translate(*cur, tr, icase_type());
- }
- this->end_ = detail::data_end(str_);
- }
- string_matcher(string_matcher<Traits, ICase> const &that)
- : str_(that.str_)
- , end_(detail::data_end(str_))
- {
- }
- template<typename BidiIter, typename Next>
- bool match(match_state<BidiIter> &state, Next const &next) const
- {
- BidiIter const tmp = state.cur_;
- char_type const *begin = detail::data_begin(this->str_);
- for(; begin != this->end_; ++begin, ++state.cur_)
- {
- if(state.eos() ||
- (detail::translate(*state.cur_, traits_cast<Traits>(state), icase_type()) != *begin))
- {
- state.cur_ = tmp;
- return false;
- }
- }
- if(next.match(state))
- {
- return true;
- }
- state.cur_ = tmp;
- return false;
- }
- detail::width get_width() const
- {
- return boost::size(this->str_);
- }
- };
- }}}
- #endif
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