projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // logical_newline_matcher.hpp | |
| 3 | // | |
| 4 | // Copyright 2008 Eric Niebler. Distributed under the Boost | |
| 5 | // Software License, Version 1.0. (See accompanying file | |
| 6 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 7 | ||
| 8 | #ifndef BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_LOGICAL_NEWLINE_MATCHER_HPP_EAN_10_04_2005 | |
| 9 | #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_LOGICAL_NEWLINE_MATCHER_HPP_EAN_10_04_2005 | |
| 10 | ||
| 11 | // MS compatible compilers support #pragma once | |
| 12 | #if defined(_MSC_VER) | |
| 13 | # pragma once | |
| 14 | #endif | |
| 15 | ||
| 16 | #include <boost/xpressive/detail/detail_fwd.hpp> | |
| 17 | #include <boost/xpressive/detail/core/quant_style.hpp> | |
| 18 | #include <boost/xpressive/detail/core/state.hpp> | |
| 19 | ||
| 20 | namespace boost { namespace xpressive { namespace detail | |
| 21 | { | |
| 22 | ||
| 23 | ////////////////////////////////////////////////////////////////////////// | |
| 24 | // logical_newline_matcher | |
| 25 | // | |
| 26 | template<typename Traits> | |
| 27 | struct logical_newline_matcher | |
| 28 | : quant_style_variable_width | |
| 29 | { | |
| 30 | typedef typename Traits::char_type char_type; | |
| 31 | typedef typename Traits::char_class_type char_class_type; | |
| 32 | ||
| 33 | logical_newline_matcher(Traits const &tr) | |
| 34 | : newline_(lookup_classname(tr, "newline")) | |
| 35 | , nl_(tr.widen('\n')) | |
| 36 | , cr_(tr.widen('\r')) | |
| 37 | { | |
| 38 | } | |
| 39 | ||
| 40 | template<typename BidiIter, typename Next> | |
| 41 | bool match(match_state<BidiIter> &state, Next const &next) const | |
| 42 | { | |
| 43 | if(state.eos()) | |
| 44 | { | |
| 45 | return false; | |
| 46 | } | |
| 47 | ||
| 48 | char_type ch = *state.cur_; | |
| 49 | if(traits_cast<Traits>(state).isctype(ch, this->newline_)) | |
| 50 | { | |
| 51 | ++state.cur_; | |
| 52 | if(this->cr_ == ch && !state.eos() && this->nl_ == *state.cur_) | |
| 53 | { | |
| 54 | ++state.cur_; | |
| 55 | if(next.match(state)) | |
| 56 | { | |
| 57 | return true; | |
| 58 | } | |
| 59 | --state.cur_; | |
| 60 | } | |
| 61 | else if(next.match(state)) | |
| 62 | { | |
| 63 | return true; | |
| 64 | } | |
| 65 | ||
| 66 | --state.cur_; | |
| 67 | } | |
| 68 | return false; | |
| 69 | } | |
| 70 | ||
| 71 | char_class_type newline() const | |
| 72 | { | |
| 73 | return this->newline_; | |
| 74 | } | |
| 75 | ||
| 76 | private: | |
| 77 | char_class_type newline_; | |
| 78 | char_type nl_, cr_; | |
| 79 | }; | |
| 80 | ||
| 81 | }}} | |
| 82 | ||
| 83 | #endif |