1// Copyright Daniel Wallin 2006.
2// Copyright Cromwell D. Enage 2017.
3// Distributed under the Boost Software License, Version 1.0.
4// (See accompanying file LICENSE_1_0.txt or copy at
5// http://www.boost.org/LICENSE_1_0.txt)
6
7#ifndef BOOST_PARAMETER_AUX_PP_IMPL_ARGUMENT_PACK_HPP
8#define BOOST_PARAMETER_AUX_PP_IMPL_ARGUMENT_PACK_HPP
9
10#include <boost/parameter/aux_/pack/tag_keyword_arg.hpp>
11#include <boost/parameter/aux_/pack/make_arg_list.hpp>
12#include <boost/parameter/config.hpp>
13
14#if defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
15#include <boost/parameter/aux_/pack/make_parameter_spec_items.hpp>
16
17#if defined(BOOST_PARAMETER_CAN_USE_MP11)
18#include <boost/mp11/integral.hpp>
19#include <boost/mp11/list.hpp>
20#else
21#include <boost/mpl/bool.hpp>
22#include <boost/mpl/pair.hpp>
23#endif
24
25namespace boost { namespace parameter { namespace aux {
26
27 template <typename Parameters, typename ...Args>
28 struct argument_pack
29 {
30 typedef typename ::boost::parameter::aux::make_arg_list<
31 typename ::boost::parameter::aux::make_parameter_spec_items<
32 typename Parameters::parameter_spec
33 , Args...
34 >::type
35 , typename Parameters::deduced_list
36 , ::boost::parameter::aux::tag_keyword_arg
37#if defined(BOOST_PARAMETER_CAN_USE_MP11)
38 , ::boost::mp11::mp_false
39#else
40 , ::boost::mpl::false_
41#endif
42 >::type result;
43#if defined(BOOST_PARAMETER_CAN_USE_MP11)
44 using type = ::boost::mp11::mp_at_c<result,0>;
45#else
46 typedef typename ::boost::mpl::first<result>::type type;
47#endif
48 };
49}}} // namespace boost::parameter::aux
50
51#else // !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
52#include <boost/parameter/aux_/void.hpp>
53#include <boost/parameter/aux_/pack/make_items.hpp>
54#include <boost/parameter/aux_/preprocessor/no_perfect_forwarding_begin.hpp>
55#include <boost/preprocessor/facilities/intercept.hpp>
56#include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp>
57#include <boost/mpl/bool.hpp>
58#include <boost/mpl/pair.hpp>
59
60namespace boost { namespace parameter { namespace aux {
61
62 template <
63 typename Parameters
64 BOOST_PP_ENUM_TRAILING_BINARY_PARAMS(
65 BOOST_PARAMETER_MAX_ARITY
66 , typename A
67 , = ::boost::parameter::void_ BOOST_PP_INTERCEPT
68 )
69 >
70 struct argument_pack
71 {
72 typedef typename ::boost::parameter::aux::make_arg_list<
73 typename BOOST_PARAMETER_build_arg_list(
74 BOOST_PARAMETER_MAX_ARITY
75 , ::boost::parameter::aux::make_items
76 , typename Parameters::parameter_spec
77 , A
78 )::type
79 , typename Parameters::deduced_list
80 , ::boost::parameter::aux::tag_keyword_arg
81 , ::boost::mpl::false_
82 >::type result;
83 typedef typename ::boost::mpl::first<result>::type type;
84 };
85}}} // namespace boost::parameter::aux
86
87#include <boost/parameter/aux_/preprocessor/no_perfect_forwarding_end.hpp>
88
89#endif // BOOST_PARAMETER_HAS_PERFECT_FORWARDING
90#endif // include guard
91
92

source code of boost/libs/parameter/include/boost/parameter/aux_/pp_impl/argument_pack.hpp