/////////////////////////////////////////////////////////////////////////////// | |
// range_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_RANGE_MATCHER_HPP_EAN_10_04_2005 | |
#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_RANGE_MATCHER_HPP_EAN_10_04_2005 | |
// MS compatible compilers support #pragma once | |
#if defined(_MSC_VER) && (_MSC_VER >= 1020) | |
# pragma once | |
# pragma warning(push) | |
# pragma warning(disable : 4100) // unreferenced formal parameter | |
#endif | |
#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> | |
namespace boost { namespace xpressive { namespace detail | |
{ | |
/////////////////////////////////////////////////////////////////////////////// | |
// range_matcher | |
// | |
template<typename Traits, typename ICase> | |
struct range_matcher | |
: quant_style_fixed_width<1> | |
{ | |
typedef typename Traits::char_type char_type; | |
typedef ICase icase_type; | |
char_type ch_min_; | |
char_type ch_max_; | |
bool not_; | |
range_matcher(char_type ch_min, char_type ch_max, bool no, Traits const &) | |
: ch_min_(ch_min) | |
, ch_max_(ch_max) | |
, not_(no) | |
{ | |
} | |
void inverse() | |
{ | |
this->not_ = !this->not_; | |
} | |
bool in_range(Traits const &tr, char_type ch, mpl::false_) const // case-sensitive | |
{ | |
return tr.in_range(this->ch_min_, this->ch_max_, ch); | |
} | |
bool in_range(Traits const &tr, char_type ch, mpl::true_) const // case-insensitive | |
{ | |
return tr.in_range_nocase(this->ch_min_, this->ch_max_, ch); | |
} | |
template<typename BidiIter, typename Next> | |
bool match(match_state<BidiIter> &state, Next const &next) const | |
{ | |
if(state.eos() || this->not_ == | |
this->in_range(traits_cast<Traits>(state), *state.cur_, icase_type())) | |
{ | |
return false; | |
} | |
++state.cur_; | |
if(next.match(state)) | |
{ | |
return true; | |
} | |
--state.cur_; | |
return false; | |
} | |
}; | |
}}} | |
#if defined(_MSC_VER) && (_MSC_VER >= 1020) | |
# pragma warning(pop) | |
#endif | |
#endif |