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/Src/Dependencies/Boost/boost/spirit/home/qi/auto/auto.hpp

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 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///////////////////////////////////////////////////////////////////////////////
25namespace 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///////////////////////////////////////////////////////////////////////////////
36namespace 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