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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) && (_MSC_VER >= 1020)
# 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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