1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
// Boost.TypeErasure library
//
// Copyright 2012 Steven Watanabe
//
// Distributed under the Boost Software License Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// $Id$
#ifndef BOOST_TYPE_ERASURE_DETAIL_CHECK_MAP_HPP_INCLUDED
#define BOOST_TYPE_ERASURE_DETAIL_CHECK_MAP_HPP_INCLUDED
#include <boost/mpl/not.hpp>
#include <boost/mpl/or.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/set.hpp>
#include <boost/mpl/has_key.hpp>
#include <boost/mpl/find_if.hpp>
#include <boost/mpl/fold.hpp>
#include <boost/mpl/end.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_erasure/detail/get_placeholders.hpp>
#include <boost/type_erasure/detail/normalize.hpp>
#include <boost/type_erasure/deduced.hpp>
#include <boost/type_erasure/static_binding.hpp>
namespace boost {
namespace type_erasure {
namespace detail {
template<class T>
struct is_deduced : boost::mpl::false_ {};
template<class T>
struct is_deduced< ::boost::type_erasure::deduced<T> > : boost::mpl::true_ {};
// returns true if Map has a key for every non-deduced placeholder in Concept
template<class Concept, class Map>
struct check_map {
#ifndef BOOST_TYPE_ERASURE_USE_MP11
typedef typename normalize_concept<Concept>::basic basic_components;
typedef typename ::boost::mpl::fold<
basic_components,
::boost::mpl::set0<>,
::boost::type_erasure::detail::get_placeholders<
::boost::mpl::_2,
::boost::mpl::_1
>
>::type placeholders;
// Every non-deduced placeholder referenced in this
// map is indirectly deduced.
typedef typename ::boost::type_erasure::detail::get_placeholder_normalization_map<
Concept>::type placeholder_subs;
typedef typename ::boost::mpl::fold<
placeholder_subs,
::boost::mpl::set0<>,
::boost::mpl::insert<
::boost::mpl::_1,
::boost::mpl::second< ::boost::mpl::_2>
>
>::type indirect_deduced_placeholders;
typedef typename ::boost::is_same<
typename ::boost::mpl::find_if<
placeholders,
::boost::mpl::not_<
::boost::mpl::or_<
::boost::type_erasure::detail::is_deduced< ::boost::mpl::_1>,
::boost::mpl::has_key<Map, ::boost::mpl::_1>,
::boost::mpl::has_key<indirect_deduced_placeholders, ::boost::mpl::_1>
>
>
>::type,
typename ::boost::mpl::end<placeholders>::type
>::type type;
#else
typedef ::boost::type_erasure::detail::get_all_placeholders<
::boost::type_erasure::detail::normalize_concept_t<Concept>
> placeholders;
// Every non-deduced placeholder referenced in this
// map is indirectly deduced.
typedef typename ::boost::type_erasure::detail::get_placeholder_normalization_map<
Concept>::type placeholder_subs;
typedef ::boost::mp11::mp_unique<
::boost::mp11::mp_append<
::boost::mp11::mp_transform<
::boost::mp11::mp_first,
::boost::type_erasure::detail::make_mp_list<Map>
>,
::boost::mp11::mp_transform<
::boost::mp11::mp_second,
::boost::type_erasure::detail::make_mp_list<placeholder_subs>
>
>
> okay_placeholders;
template<class P>
using check_placeholder = ::boost::mpl::or_<
::boost::type_erasure::detail::is_deduced<P>,
::boost::mp11::mp_set_contains<okay_placeholders, P>
>;
typedef ::boost::mp11::mp_all_of<placeholders, check_placeholder> type;
#endif
};
template<class Concept, class Map>
struct check_map<Concept, ::boost::type_erasure::static_binding<Map> > :
check_map<Concept, Map>
{};
}
}
}
#endif
|
