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 
auto_parserboost::spirit::qi::auto_parser54         auto_parser(Modifiers const& modifiers)
55           : modifiers_(modifiers) {}
56 
57         template <typename Iterator, typename Context, typename Skipper
58           , typename Attribute>
parseboost::spirit::qi::auto_parser59         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>
whatboost::spirit::qi::auto_parser67         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 
operator ()boost::spirit::qi::make_primitive83         result_type operator()(unused_type, Modifiers const& modifiers) const
84         {
85             return result_type(modifiers);
86         }
87     };
88 }}}
89 
90 #endif
91