/////////////////////////////////////////////////////////////////////////////// | |
// literal_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_LITERAL_MATCHER_HPP_EAN_10_04_2005 | |
#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_LITERAL_MATCHER_HPP_EAN_10_04_2005 | |
// MS compatible compilers support #pragma once | |
#if defined(_MSC_VER) && (_MSC_VER >= 1020) | |
# pragma once | |
#endif | |
#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/traits_utils.hpp> | |
namespace boost { namespace xpressive { namespace detail | |
{ | |
/////////////////////////////////////////////////////////////////////////////// | |
// literal_matcher | |
// | |
template<typename Traits, typename ICase, typename Not> | |
struct literal_matcher | |
: quant_style_fixed_width<1> | |
{ | |
typedef typename Traits::char_type char_type; | |
typedef Not not_type; | |
typedef ICase icase_type; | |
char_type ch_; | |
explicit literal_matcher(char_type ch) | |
: ch_(ch) | |
{} | |
literal_matcher(char_type ch, Traits const &tr) | |
: ch_(detail::translate(ch, tr, icase_type())) | |
{} | |
template<typename BidiIter, typename Next> | |
bool match(match_state<BidiIter> &state, Next const &next) const | |
{ | |
if(state.eos() || Not::value == | |
(detail::translate(*state.cur_, traits_cast<Traits>(state), icase_type()) == this->ch_)) | |
{ | |
return false; | |
} | |
++state.cur_; | |
if(next.match(state)) | |
{ | |
return true; | |
} | |
--state.cur_; | |
return false; | |
} | |
}; | |
}}} | |
#endif |