1// Copyright Daniel Wallin 2005.
2// Distributed under the Boost Software License, Version 1.0.
3// (See accompanying file LICENSE_1_0.txt or copy at
4// http://www.boost.org/LICENSE_1_0.txt)
5
6#ifndef BOOST_PARAMETER_AUX_PREPROCESSOR_IMPL_FLATTEN_HPP
7#define BOOST_PARAMETER_AUX_PREPROCESSOR_IMPL_FLATTEN_HPP
8
9#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPLIT_required required,
10#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPLIT_optional optional,
11#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPLIT_deduced deduced,
12#define BOOST_PARAMETER_AUX_PP_FLATTEN_IDENTITY(x) x
13#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC0_DUMMY_ELEM(z, n, data) ~
14
15#include <boost/preprocessor/cat.hpp>
16
17#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPLIT(sub) \
18 BOOST_PP_CAT(BOOST_PARAMETER_AUX_PP_FLATTEN_SPLIT_, sub)
19/**/
20
21#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_AS_DEDUCED(x) \
22 BOOST_PP_CAT(deduced_, x)
23/**/
24
25#include <boost/preprocessor/detail/split.hpp>
26
27#define BOOST_PARAMETER_AUX_PP_FLATTEN_QUALIFIER(sub) \
28 BOOST_PP_SPLIT(0, BOOST_PARAMETER_AUX_PP_FLATTEN_SPLIT(sub))
29/**/
30
31#define BOOST_PARAMETER_AUX_PP_FLATTEN_ARGS(sub) \
32 BOOST_PP_SPLIT(1, BOOST_PARAMETER_AUX_PP_FLATTEN_SPLIT(sub))
33/**/
34
35#include <boost/preprocessor/tuple/elem.hpp>
36
37#define BOOST_PARAMETER_AUX_PP_FLATTEN_ARITY_optional(arities) \
38 BOOST_PP_TUPLE_ELEM(3, 0, arities)
39/**/
40
41#define BOOST_PARAMETER_AUX_PP_FLATTEN_ARITY_required(arities) \
42 BOOST_PP_TUPLE_ELEM(3, 1, arities)
43/**/
44
45#include <boost/preprocessor/arithmetic/sub.hpp>
46#include <boost/preprocessor/repetition/enum_trailing.hpp>
47#include <boost/preprocessor/tuple/rem.hpp>
48
49#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC0(r, n, elem, data) \
50 (( \
51 BOOST_PP_TUPLE_ELEM(3, 2, data) \
52 , BOOST_PP_TUPLE_REM(BOOST_PP_TUPLE_ELEM(3, 0, data)) elem \
53 BOOST_PP_ENUM_TRAILING( \
54 BOOST_PP_SUB( \
55 BOOST_PP_TUPLE_ELEM(3, 1, data) \
56 , BOOST_PP_TUPLE_ELEM(3, 0, data) \
57 ) \
58 , BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC0_DUMMY_ELEM \
59 , ~ \
60 ) \
61 ))
62/**/
63
64#include <boost/parameter/aux_/preprocessor/impl/for_each.hpp>
65
66#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_AUX( \
67 r, arity, max_arity, spec, xform \
68) \
69 BOOST_PARAMETER_AUX_PP_FOR_EACH_R( \
70 r \
71 , arity \
72 , BOOST_PARAMETER_AUX_PP_FLATTEN_ARGS(spec) \
73 , ( \
74 arity \
75 , max_arity \
76 , xform(BOOST_PARAMETER_AUX_PP_FLATTEN_QUALIFIER(spec)) \
77 ) \
78 , BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC0 \
79 )
80/**/
81
82#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_optional(r, arities, spec) \
83 BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_AUX( \
84 r \
85 , BOOST_PP_CAT( \
86 BOOST_PARAMETER_AUX_PP_FLATTEN_ARITY_ \
87 , BOOST_PARAMETER_AUX_PP_FLATTEN_QUALIFIER(spec) \
88 )(arities) \
89 , BOOST_PP_TUPLE_ELEM(3, 2, arities) \
90 , spec \
91 , BOOST_PARAMETER_AUX_PP_FLATTEN_IDENTITY \
92 )
93/**/
94
95#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_required(r, arities, spec) \
96 BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_optional(r, arities, spec)
97/**/
98
99#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_deduced_M(r, arities, n, spec) \
100 BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_AUX( \
101 r \
102 , BOOST_PP_CAT( \
103 BOOST_PARAMETER_AUX_PP_FLATTEN_ARITY_ \
104 , BOOST_PARAMETER_AUX_PP_FLATTEN_QUALIFIER(spec) \
105 )(arities) \
106 , BOOST_PP_TUPLE_ELEM(3, 2, arities) \
107 , spec \
108 , BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_AS_DEDUCED \
109 )
110/**/
111
112#include <boost/preprocessor/seq/for_each_i.hpp>
113
114#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_deduced(r, arities, spec) \
115 BOOST_PP_SEQ_FOR_EACH_I_R( \
116 r \
117 , BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_deduced_M \
118 , arities \
119 , BOOST_PARAMETER_AUX_PP_FLATTEN_ARGS(spec) \
120 )
121/**/
122
123#define BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC(r, arities, spec) \
124 BOOST_PP_CAT( \
125 BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC_ \
126 , BOOST_PARAMETER_AUX_PP_FLATTEN_QUALIFIER(spec) \
127 )(r, arities, spec)
128/**/
129
130#include <boost/preprocessor/seq/for_each.hpp>
131
132#define BOOST_PARAMETER_AUX_PP_FLATTEN( \
133 opt_arity, req_arity, wanted_arity, specs \
134) \
135 BOOST_PP_SEQ_FOR_EACH( \
136 BOOST_PARAMETER_AUX_PP_FLATTEN_SPEC \
137 , (opt_arity, req_arity, wanted_arity) \
138 , specs \
139 )
140/**/
141
142#endif // include guard
143
144

source code of boost/libs/parameter/include/boost/parameter/aux_/preprocessor/impl/flatten.hpp