1 // Copyright Daniel Wallin 2005. Use, modification and distribution is
2 // subject to the Boost Software License, Version 1.0. (See accompanying
3 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
5 #ifndef BOOST_PARAMETER_FLATTEN_051217_HPP
6 # define BOOST_PARAMETER_FLATTEN_051217_HPP
8 # include <boost/preprocessor/tuple/elem.hpp>
9 # include <boost/preprocessor/tuple/rem.hpp>
10 # include <boost/preprocessor/cat.hpp>
11 # include <boost/preprocessor/seq/for_each.hpp>
12 # include <boost/preprocessor/seq/for_each_i.hpp>
13 # include <boost/preprocessor/identity.hpp>
14 # include <boost/preprocessor/selection/max.hpp>
15 # include <boost/preprocessor/arithmetic/sub.hpp>
16 # include <boost/preprocessor/repetition/enum_trailing.hpp>
17 # include <boost/parameter/aux_/preprocessor/for_each.hpp>
19 # define BOOST_PARAMETER_FLATTEN_SPLIT_required required,
20 # define BOOST_PARAMETER_FLATTEN_SPLIT_optional optional,
21 # define BOOST_PARAMETER_FLATTEN_SPLIT_deduced deduced,
23 # define BOOST_PARAMETER_FLATTEN_SPLIT(sub) \
24 BOOST_PP_CAT(BOOST_PARAMETER_FLATTEN_SPLIT_, sub)
26 # define BOOST_PARAMETER_FLATTEN_QUALIFIER(sub) \
27 BOOST_PP_SPLIT(0, BOOST_PARAMETER_FLATTEN_SPLIT(sub))
29 # define BOOST_PARAMETER_FLATTEN_ARGS(sub) \
30 BOOST_PP_SPLIT(1, BOOST_PARAMETER_FLATTEN_SPLIT(sub))
32 # define BOOST_PARAMETER_FLATTEN_ARITY_optional(arities) \
33 BOOST_PP_TUPLE_ELEM(3,0,arities)
35 # define BOOST_PARAMETER_FLATTEN_ARITY_required(arities) \
36 BOOST_PP_TUPLE_ELEM(3,1,arities)
38 # define BOOST_PARAMETER_FLATTEN_SPEC0_DUMMY_ELEM(z, n, data) ~
39 # define BOOST_PARAMETER_FLATTEN_SPEC0(r, n, elem, data) \
41 BOOST_PP_TUPLE_ELEM(3,2,data) \
42 , BOOST_PP_TUPLE_REM(BOOST_PP_TUPLE_ELEM(3,0,data)) elem \
43 BOOST_PP_ENUM_TRAILING( \
45 BOOST_PP_TUPLE_ELEM(3,1,data) \
46 , BOOST_PP_TUPLE_ELEM(3,0,data) \
48 , BOOST_PARAMETER_FLATTEN_SPEC0_DUMMY_ELEM \
53 # define BOOST_PARAMETER_FLATTEN_SPEC_AUX(r, arity, max_arity, spec, transform) \
54 BOOST_PARAMETER_FOR_EACH_R( \
57 , BOOST_PARAMETER_FLATTEN_ARGS(spec) \
58 , (arity, max_arity, transform(BOOST_PARAMETER_FLATTEN_QUALIFIER(spec))) \
59 , BOOST_PARAMETER_FLATTEN_SPEC0 \
62 # define BOOST_PARAMETER_FLATTEN_IDENTITY(x) x
64 # define BOOST_PARAMETER_FLATTEN_SPEC_optional(r, arities, spec) \
65 BOOST_PARAMETER_FLATTEN_SPEC_AUX( \
68 BOOST_PARAMETER_FLATTEN_ARITY_, BOOST_PARAMETER_FLATTEN_QUALIFIER(spec) \
70 , BOOST_PP_TUPLE_ELEM(3,2,arities) \
72 , BOOST_PARAMETER_FLATTEN_IDENTITY \
75 # define BOOST_PARAMETER_FLATTEN_SPEC_required(r, arities, spec) \
76 BOOST_PARAMETER_FLATTEN_SPEC_optional(r, arities, spec)
78 # define BOOST_PARAMETER_FLATTEN_SPEC_AS_DEDUCED(x) BOOST_PP_CAT(deduced_,x)
80 # define BOOST_PARAMETER_FLATTEN_SPEC_deduced_M(r, arities, n, spec) \
81 BOOST_PARAMETER_FLATTEN_SPEC_AUX( \
84 BOOST_PARAMETER_FLATTEN_ARITY_, BOOST_PARAMETER_FLATTEN_QUALIFIER(spec) \
86 , BOOST_PP_TUPLE_ELEM(3,2,arities) \
88 , BOOST_PARAMETER_FLATTEN_SPEC_AS_DEDUCED \
91 # define BOOST_PARAMETER_FLATTEN_SPEC_deduced(r, arities, spec) \
92 BOOST_PP_SEQ_FOR_EACH_I_R( \
94 , BOOST_PARAMETER_FLATTEN_SPEC_deduced_M \
96 , BOOST_PARAMETER_FLATTEN_ARGS(spec) \
99 # define BOOST_PARAMETER_FLATTEN_SPEC(r, arities, spec) \
101 BOOST_PARAMETER_FLATTEN_SPEC_, BOOST_PARAMETER_FLATTEN_QUALIFIER(spec) \
104 # define BOOST_PARAMETER_FLATTEN(optional_arity, required_arity, wanted_arity, specs) \
105 BOOST_PP_SEQ_FOR_EACH( \
106 BOOST_PARAMETER_FLATTEN_SPEC \
108 optional_arity, required_arity \
114 #endif // BOOST_PARAMETER_FLATTEN_051217_HPP