1
2#if !defined(BOOST_PP_IS_ITERATING)
3
4///// header body
5
6#ifndef BOOST_MPL_ARG_HPP_INCLUDED
7#define BOOST_MPL_ARG_HPP_INCLUDED
8
9// Copyright Peter Dimov 2001-2002
10// Copyright Aleksey Gurtovoy 2001-2004
11//
12// Distributed under the Boost Software License, Version 1.0.
13// (See accompanying file LICENSE_1_0.txt or copy at
14// http://www.boost.org/LICENSE_1_0.txt)
15//
16// See http://www.boost.org/libs/mpl for documentation.
17
18// $Id$
19// $Date$
20// $Revision$
21
22#if !defined(BOOST_MPL_PREPROCESSING_MODE)
23# include <boost/mpl/arg_fwd.hpp>
24# include <boost/mpl/aux_/na.hpp>
25# include <boost/mpl/aux_/na_assert.hpp>
26# include <boost/mpl/aux_/arity_spec.hpp>
27# include <boost/mpl/aux_/arg_typedef.hpp>
28#endif
29
30#include <boost/mpl/aux_/config/static_constant.hpp>
31#include <boost/mpl/aux_/config/use_preprocessed.hpp>
32
33#if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \
34 && !defined(BOOST_MPL_PREPROCESSING_MODE)
35
36# define BOOST_MPL_PREPROCESSED_HEADER arg.hpp
37# include <boost/mpl/aux_/include_preprocessed.hpp>
38
39#else
40
41# include <boost/mpl/limits/arity.hpp>
42# include <boost/mpl/aux_/preprocessor/default_params.hpp>
43# include <boost/mpl/aux_/preprocessor/params.hpp>
44# include <boost/mpl/aux_/config/lambda.hpp>
45# include <boost/mpl/aux_/config/dtp.hpp>
46# include <boost/mpl/aux_/nttp_decl.hpp>
47
48# include <boost/preprocessor/iterate.hpp>
49# include <boost/preprocessor/inc.hpp>
50# include <boost/preprocessor/cat.hpp>
51
52BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
53
54// local macro, #undef-ined at the end of the header
55#if !defined(BOOST_MPL_CFG_NO_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES)
56# define AUX778076_ARG_N_DEFAULT_PARAMS(param,value) \
57 BOOST_MPL_PP_DEFAULT_PARAMS( \
58 BOOST_MPL_LIMIT_METAFUNCTION_ARITY \
59 , param \
60 , value \
61 ) \
62 /**/
63#else
64# define AUX778076_ARG_N_DEFAULT_PARAMS(param,value) \
65 BOOST_MPL_PP_PARAMS( \
66 BOOST_MPL_LIMIT_METAFUNCTION_ARITY \
67 , param \
68 ) \
69 /**/
70#endif
71
72#define BOOST_PP_ITERATION_PARAMS_1 \
73 (3,(0, BOOST_MPL_LIMIT_METAFUNCTION_ARITY, <boost/mpl/arg.hpp>))
74#include BOOST_PP_ITERATE()
75
76
77# undef AUX778076_ARG_N_DEFAULT_PARAMS
78
79BOOST_MPL_AUX_NONTYPE_ARITY_SPEC(1,int,arg)
80
81BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
82
83#endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
84#endif // BOOST_MPL_ARG_HPP_INCLUDED
85
86///// iteration
87
88#else
89#define i_ BOOST_PP_FRAME_ITERATION(1)
90
91#if i_ > 0
92
93template<> struct arg<i_>
94{
95 BOOST_STATIC_CONSTANT(int, value = i_);
96 typedef arg<BOOST_PP_INC(i_)> next;
97 BOOST_MPL_AUX_ARG_TYPEDEF(na, tag)
98 BOOST_MPL_AUX_ARG_TYPEDEF(na, type)
99
100 template<
101 AUX778076_ARG_N_DEFAULT_PARAMS(typename U, na)
102 >
103 struct apply
104 {
105 typedef BOOST_PP_CAT(U,i_) type;
106 BOOST_MPL_AUX_ASSERT_NOT_NA(type);
107 };
108};
109
110#else
111
112template<> struct arg<-1>
113{
114 BOOST_STATIC_CONSTANT(int, value = -1);
115 BOOST_MPL_AUX_ARG_TYPEDEF(na, tag)
116 BOOST_MPL_AUX_ARG_TYPEDEF(na, type)
117
118 template<
119 AUX778076_ARG_N_DEFAULT_PARAMS(typename U, na)
120 >
121 struct apply
122 {
123 typedef U1 type;
124 BOOST_MPL_AUX_ASSERT_NOT_NA(type);
125 };
126};
127
128#endif // i_ > 0
129
130#undef i_
131#endif // BOOST_PP_IS_ITERATING
132

source code of include/boost/mpl/arg.hpp