ceph/src/boost/libs/spirit/include/boost/spirit/home/classic/core/composite/sequence.hpp

   1 /*=============================================================================
   2     Copyright (c) 1998-2003 Joel de Guzman
   3     Copyright (c) 2001 Daniel Nuffer
   4     Copyright (c) 2002 Hartmut Kaiser
   5     http://spirit.sourceforge.net/
   6
   7   Distributed under the Boost Software License, Version 1.0. (See accompanying
   8   file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 =============================================================================*/
  10 #if !defined(BOOST_SPIRIT_SEQUENCE_HPP)
  11 #define BOOST_SPIRIT_SEQUENCE_HPP
  12
  13 #include <boost/spirit/home/classic/namespace.hpp>
  14 #include <boost/spirit/home/classic/core/parser.hpp>
  15 #include <boost/spirit/home/classic/core/primitives/primitives.hpp>
  16 #include <boost/spirit/home/classic/core/composite/composite.hpp>
  17 #include <boost/spirit/home/classic/meta/as_parser.hpp>
  18
  19 namespace boost { namespace spirit {
  20
  21 BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
  22
  23     ///////////////////////////////////////////////////////////////////////////
  24     //
  25     //  sequence class
  26     //
  27     //      Handles expressions of the form:
  28     //
  29     //          a >> b
  30     //
  31     //      where a and b are parsers. The expression returns a composite
  32     //      parser that matches a and b in sequence. One (not both) of the
  33     //      operands may be a literal char, wchar_t or a primitive string
  34     //      char const*, wchar_t const*.
  35     //
  36     //////////////////////////////////////////////////////////////////////////
  37     struct sequence_parser_gen;
  38
  39 #if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
  40 #pragma warning(push)
  41 #pragma warning(disable:4512) //assignment operator could not be generated
  42 #endif
  43
  44     template <typename A, typename B>
  45     struct sequence : public binary<A, B, parser<sequence<A, B> > >
  46     {
  47         typedef sequence<A, B>                  self_t;
  48         typedef binary_parser_category          parser_category_t;
  49         typedef sequence_parser_gen             parser_generator_t;
  50         typedef binary<A, B, parser<self_t> >   base_t;
  51
  52         sequence(A const& a, B const& b)
  53         : base_t(a, b) {}
  54
  55         template <typename ScannerT>
  56         typename parser_result<self_t, ScannerT>::type
  57         parse(ScannerT const& scan) const
  58         {
  59             typedef typename parser_result<self_t, ScannerT>::type result_t;
  60             if (result_t ma = this->left().parse(scan))
  61                 if (result_t mb = this->right().parse(scan))
  62                 {
  63                     scan.concat_match(ma, mb);
  64                     return ma;
  65                 }
  66             return scan.no_match();
  67         }
  68     };
  69
  70 #if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
  71 #pragma warning(pop)
  72 #endif
  73
  74     struct sequence_parser_gen
  75     {
  76         template <typename A, typename B>
  77         struct result
  78         {
  79             typedef
  80                 sequence<
  81                     typename as_parser<A>::type
  82                   , typename as_parser<B>::type
  83                 >
  84             type;
  85         };
  86
  87         template <typename A, typename B>
  88         static sequence<
  89             typename as_parser<A>::type
  90           , typename as_parser<B>::type
  91         >
  92         generate(A const& a, B const& b)
  93         {
  94             return sequence<BOOST_DEDUCED_TYPENAME as_parser<A>::type,
  95                 BOOST_DEDUCED_TYPENAME as_parser<B>::type>
  96                     (as_parser<A>::convert(a), as_parser<B>::convert(b));
  97         }
  98     };
  99
 100     template <typename A, typename B>
 101     sequence<A, B>
 102     operator>>(parser<A> const& a, parser<B> const& b);
 103
 104     template <typename A>
 105     sequence<A, chlit<char> >
 106     operator>>(parser<A> const& a, char b);
 107
 108     template <typename B>
 109     sequence<chlit<char>, B>
 110     operator>>(char a, parser<B> const& b);
 111
 112     template <typename A>
 113     sequence<A, strlit<char const*> >
 114     operator>>(parser<A> const& a, char const* b);
 115
 116     template <typename B>
 117     sequence<strlit<char const*>, B>
 118     operator>>(char const* a, parser<B> const& b);
 119
 120     template <typename A>
 121     sequence<A, chlit<wchar_t> >
 122     operator>>(parser<A> const& a, wchar_t b);
 123
 124     template <typename B>
 125     sequence<chlit<wchar_t>, B>
 126     operator>>(wchar_t a, parser<B> const& b);
 127
 128     template <typename A>
 129     sequence<A, strlit<wchar_t const*> >
 130     operator>>(parser<A> const& a, wchar_t const* b);
 131
 132     template <typename B>
 133     sequence<strlit<wchar_t const*>, B>
 134     operator>>(wchar_t const* a, parser<B> const& b);
 135
 136 BOOST_SPIRIT_CLASSIC_NAMESPACE_END
 137
 138 }} // namespace BOOST_SPIRIT_CLASSIC_NS
 139
 140 #endif
 141
 142 #include <boost/spirit/home/classic/core/composite/impl/sequence.ipp>