ceph/src/boost/libs/spirit/include/boost/spirit/home/qi/auto/auto.hpp

   1 //  Copyright (c) 2001-2011 Hartmut Kaiser
   2 //
   3 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #if !defined(BOOST_SPIRIT_QI_AUTO_NOV_29_2009_0336PM)
   7 #define BOOST_SPIRIT_QI_AUTO_NOV_29_2009_0336PM
   8
   9 #if defined(_MSC_VER)
  10 #pragma once
  11 #endif
  12
  13 #include <boost/spirit/home/support/common_terminals.hpp>
  14 #include <boost/spirit/home/support/info.hpp>
  15 #include <boost/spirit/home/support/container.hpp>
  16 #include <boost/spirit/home/support/detail/hold_any.hpp>
  17 #include <boost/spirit/home/qi/domain.hpp>
  18 #include <boost/spirit/home/qi/meta_compiler.hpp>
  19 #include <boost/spirit/home/qi/skip_over.hpp>
  20 #include <boost/spirit/home/qi/parser.hpp>
  21 #include <boost/spirit/home/qi/auto/create_parser.hpp>
  22 #include <boost/mpl/bool.hpp>
  23
  24 ///////////////////////////////////////////////////////////////////////////////
  25 namespace boost { namespace spirit
  26 {
  27     ///////////////////////////////////////////////////////////////////////////
  28     // Enablers
  29     ///////////////////////////////////////////////////////////////////////////
  30     template <>
  31     struct use_terminal<qi::domain, tag::auto_>     // enables auto_
  32       : mpl::true_ {};
  33 }}
  34
  35 ///////////////////////////////////////////////////////////////////////////////
  36 namespace boost { namespace spirit { namespace qi
  37 {
  38 #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
  39     using spirit::auto_;
  40 #endif
  41     using spirit::auto_type;
  42
  43     ///////////////////////////////////////////////////////////////////////////
  44     template <typename Modifiers>
  45     struct auto_parser
  46       : parser<auto_parser<Modifiers> >
  47     {
  48         template <typename Context, typename Iterator>
  49         struct attribute
  50         {
  51             typedef spirit::hold_any type;
  52         };
  53
  54         auto_parser(Modifiers const& modifiers)
  55           : modifiers_(modifiers) {}
  56
  57         template <typename Iterator, typename Context, typename Skipper
  58           , typename Attribute>
  59         bool parse(Iterator& first, Iterator const& last
  60           , Context& context, Skipper const& skipper, Attribute& attr) const
  61         {
  62             return compile<qi::domain>(create_parser<Attribute>(), modifiers_)
  63                       .parse(first, last, context, skipper, attr);
  64         }
  65
  66         template <typename Context>
  67         info what(Context& /*context*/) const
  68         {
  69             return info("auto_");
  70         }
  71
  72         Modifiers modifiers_;
  73     };
  74
  75     ///////////////////////////////////////////////////////////////////////////
  76     // Generator generators: make_xxx function (objects)
  77     ///////////////////////////////////////////////////////////////////////////
  78     template <typename Modifiers>
  79     struct make_primitive<tag::auto_, Modifiers>
  80     {
  81         typedef auto_parser<Modifiers> result_type;
  82
  83         result_type operator()(unused_type, Modifiers const& modifiers) const
  84         {
  85             return result_type(modifiers);
  86         }
  87     };
  88 }}}
  89
  90 #endif