1 /*============================================================================= 2 Copyright (c) 2001-2011 Hartmut Kaiser 3 Copyright (c) 2001-2011 Joel de Guzman 4 5 Distributed under the Boost Software License, Version 1.0. (See accompanying 6 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 7 ==============================================================================*/ 8 #if !defined(BOOST_SPIRIT_EOL_APRIL_18_2008_0751PM) 9 #define BOOST_SPIRIT_EOL_APRIL_18_2008_0751PM 10 11 #if defined(_MSC_VER) 12 #pragma once 13 #endif 14 15 #include <boost/mpl/bool.hpp> 16 #include <boost/spirit/home/qi/domain.hpp> 17 #include <boost/spirit/home/qi/parser.hpp> 18 #include <boost/spirit/home/qi/meta_compiler.hpp> 19 #include <boost/spirit/home/qi/skip_over.hpp> 20 #include <boost/spirit/home/support/common_terminals.hpp> 21 22 namespace boost { namespace spirit 23 { 24 /////////////////////////////////////////////////////////////////////////// 25 // Enablers 26 /////////////////////////////////////////////////////////////////////////// 27 template <> 28 struct use_terminal<qi::domain, tag::eol> // enables eol 29 : mpl::true_ {}; 30 }} 31 32 namespace boost { namespace spirit { namespace qi 33 { 34 #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS 35 using spirit::eol; 36 #endif 37 using spirit::eol_type; 38 39 struct eol_parser : primitive_parser<eol_parser> 40 { 41 template <typename Context, typename Iterator> 42 struct attribute 43 { 44 typedef unused_type type; 45 }; 46 47 template <typename Iterator, typename Context 48 , typename Skipper, typename Attribute> parseboost::spirit::qi::eol_parser49 bool parse(Iterator& first, Iterator const& last 50 , Context& /*context*/, Skipper const& skipper 51 , Attribute& /*attr*/) const 52 { 53 qi::skip_over(first, last, skipper); 54 55 Iterator it = first; 56 bool matched = false; 57 if (it != last && *it == '\r') // CR 58 { 59 matched = true; 60 ++it; 61 } 62 if (it != last && *it == '\n') // LF 63 { 64 matched = true; 65 ++it; 66 } 67 68 if (!matched) 69 return false; 70 71 first = it; 72 return true; 73 } 74 75 template <typename Context> whatboost::spirit::qi::eol_parser76 info what(Context& /*context*/) const 77 { 78 return info("eol"); 79 } 80 }; 81 82 /////////////////////////////////////////////////////////////////////////// 83 // Parser generators: make_xxx function (objects) 84 /////////////////////////////////////////////////////////////////////////// 85 template <typename Modifiers> 86 struct make_primitive<tag::eol, Modifiers> 87 { 88 typedef eol_parser result_type; operator ()boost::spirit::qi::make_primitive89 result_type operator()(unused_type, unused_type) const 90 { 91 return result_type(); 92 } 93 }; 94 }}} 95 96 #endif 97 98 99