1 /*==============================================================================
2     Copyright (c) 2001-2010 Joel de Guzman
3     Copyright (c) 2010 Eric Niebler
4     Copyright (c) 2010-2011 Thomas Heller
5 
6     Distributed under the Boost Software License, Version 1.0. (See accompanying
7     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
8 ==============================================================================*/
9 #ifndef BOOST_PHOENIX_CORE_ARGUMENT_HPP
10 #define BOOST_PHOENIX_CORE_ARGUMENT_HPP
11 
12 #include <boost/phoenix/core/limits.hpp>
13 #include <boost/phoenix/core/actor.hpp>
14 #include <boost/phoenix/core/expression.hpp>
15 #include <boost/phoenix/core/terminal.hpp>
16 #include <boost/mpl/int.hpp>
17 
18 namespace boost { namespace phoenix
19 {
20     ////////////////////////////////////////////////////////////////////////////
21     //
22     //  argument
23     //
24     //      function for evaluating argument placeholders like: _1
25     //
26     ////////////////////////////////////////////////////////////////////////////
27 
28     template <int I>
29     struct argument
30         //: mpl::int_<I>
31     {
32         typedef typename mpl::int_<I>::value_type value_type;
33         static const value_type value = mpl::int_<I>::value;
34 
operator ==boost::phoenix::argument35         bool operator==(argument) const
36         {
37             return true;
38         }
39 
40         template <int I2>
operator ==boost::phoenix::argument41         bool operator==(argument<I2>) const
42         {
43             return false;
44         }
45     };
46 }}
47 
48 namespace boost {
49     template <int I>
50     struct is_placeholder<phoenix::argument<I> >
51         : mpl::int_<I>
52     {};
53 }
54 
55 namespace boost { namespace phoenix
56 {
57     namespace expression
58     {
59         template <int I>
60         struct argument
61             : expression::terminal<phoenix::argument<I> >
62         {
63             typedef typename expression::terminal<phoenix::argument<I> >::type type;
makeboost::phoenix::expression::argument64             static const type make()
65             {
66                 type const e = {{{}}};
67                 return e;
68             }
69         };
70     }
71 
72 #if !defined(BOOST_PHOENIX_DONT_USE_PREPROCESSED_FILES)
73 
74 #include <boost/phoenix/core/detail/cpp03/preprocessed/argument.hpp>
75 
76 #else
77 
78 #if !defined(BOOST_PHOENIX_CREATE_PREPROCESSED_FILES)
79 #include <boost/phoenix/core/detail/argument.hpp>
80 #else
81 
82 #if defined(__WAVE__) && defined(BOOST_PHOENIX_CREATE_PREPROCESSED_FILES)
83 #pragma wave option(preserve: 2, line: 0, output: "detail/cpp03/preprocessed/argument_predefined_" BOOST_PHOENIX_LIMIT_STR ".hpp")
84 #endif
85 /*==============================================================================
86     Copyright (c) 2001-2010 Joel de Guzman
87     Copyright (c) 2010-2011 Thomas Heller
88 
89     Distributed under the Boost Software License, Version 1.0. (See accompanying
90     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
91 ==============================================================================*/
92 
93 #if defined(__WAVE__) && defined(BOOST_PHOENIX_CREATE_PREPROCESSED_FILES)
94 #pragma wave option(preserve: 1)
95 #endif
96 
97 #ifdef BOOST_PHOENIX_NO_PREDEFINED_TERMINALS
98 #undef BOOST_PHOENIX_NO_PREDEFINED_TERMINALS
99 #define BOOST_PHOENIX_NO_PREDEFINED_TERMINALS_RESTORE
100 #endif
101 
102 #include <boost/phoenix/core/detail/argument.hpp>
103 
104 #ifndef BOOST_PHOENIX_NO_PREDEFINED_TERMINALS_RESTORE
105 #define BOOST_PHOENIX_NO_PREDEFINED_TERMINALS
106 #undef BOOST_PHOENIX_NO_PREDEFINED_TERIMINALS_RESTORE
107 #endif
108 
109 #if defined(__WAVE__) && defined(BOOST_PHOENIX_CREATE_PREPROCESSED_FILES)
110 #pragma wave option(output: null)
111 #endif
112 
113 #if defined(__WAVE__) && defined(BOOST_PHOENIX_CREATE_PREPROCESSED_FILES)
114 #pragma wave option(preserve: 2, line: 0, output: "detail/cpp03/preprocessed/argument_no_predefined_" BOOST_PHOENIX_LIMIT_STR ".hpp")
115 #endif
116 /*==============================================================================
117     Copyright (c) 2001-2010 Joel de Guzman
118     Copyright (c) 2010-2011 Thomas Heller
119 
120     Distributed under the Boost Software License, Version 1.0. (See accompanying
121     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
122 ==============================================================================*/
123 
124 #if defined(__WAVE__) && defined(BOOST_PHOENIX_CREATE_PREPROCESSED_FILES)
125 #pragma wave option(preserve: 1)
126 #endif
127 
128 #ifndef BOOST_PHOENIX_NO_PREDEFINED_TERMINALS
129 #define BOOST_PHOENIX_NO_PREDEFINED_TERMINALS
130 #define BOOST_PHOENIX_NO_PREDEFINED_TERMINALS_RESTORE
131 #endif
132 
133 #include <boost/phoenix/core/detail/argument.hpp>
134 
135 #ifndef BOOST_PHOENIX_NO_PREDEFINED_TERMINALS_RESTORE
136 #undef BOOST_PHOENIX_NO_PREDEFINED_TERMINALS
137 #undef BOOST_PHOENIX_NO_PREDEFINED_TERIMINALS_RESTORE
138 #endif
139 
140 #if defined(__WAVE__) && defined(BOOST_PHOENIX_CREATE_PREPROCESSED_FILES)
141 #pragma wave option(output: null)
142 #endif
143 
144 #endif
145 
146 #endif
147 
148 }}
149 
150 #endif
151