| /////////////////////////////////////////////////////////////////////////////// |
| // assert_eol_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_ASSERT_EOL_MATCHER_HPP_EAN_10_04_2005 |
| #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_ASSERT_EOL_MATCHER_HPP_EAN_10_04_2005 |
| |
| // MS compatible compilers support #pragma once |
| #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| # pragma once |
| #endif |
| |
| #include <boost/next_prior.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/core/matcher/assert_line_base.hpp> |
| |
| namespace boost { namespace xpressive { namespace detail |
| { |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // assert_eol_matcher |
| // |
| template<typename Traits> |
| struct assert_eol_matcher |
| : assert_line_base<Traits> |
| { |
| typedef typename Traits::char_type char_type; |
| |
| assert_eol_matcher(Traits const &tr) |
| : assert_line_base<Traits>(tr) |
| { |
| } |
| |
| template<typename BidiIter, typename Next> |
| bool match(match_state<BidiIter> &state, Next const &next) const |
| { |
| if(state.eos()) |
| { |
| if(!state.flags_.match_eol_) |
| { |
| return false; |
| } |
| } |
| else |
| { |
| char_type ch = *state.cur_; |
| |
| // If the current character is not a newline, we're not at the end of a line |
| if(!traits_cast<Traits>(state).isctype(ch, this->newline_)) |
| { |
| return false; |
| } |
| // There is no line-break between \r and \n |
| else if(ch == this->nl_ && (!state.bos() || state.flags_.match_prev_avail_) && *boost::prior(state.cur_) == this->cr_) |
| { |
| return false; |
| } |
| } |
| |
| return next.match(state); |
| } |
| }; |
| |
| }}} |
| |
| #endif |