blob: 0d3dd45d5413431bfcaa28a7df2edbf90cc76a59 (
plain)
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
|
// TR2 <type_traits> -*- C++ -*-
// Copyright (C) 2011-2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/** @file tr2/type_traits
* This is a TR2 C++ Library header.
*/
#ifndef _GLIBCXX_TR2_TYPE_TRAITS
#define _GLIBCXX_TR2_TYPE_TRAITS 1
#pragma GCC system_header
#include <type_traits>
#include <bits/c++config.h>
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
namespace tr2
{
/**
* @addtogroup metaprogramming
* @{
*/
/**
* See N2965: Type traits and base classes
* by Michael Spertus
*/
/**
* Simple typelist. Compile-time list of types.
*/
template<typename... _Elements>
struct __reflection_typelist;
/// Specialization for an empty typelist.
template<>
struct __reflection_typelist<>
{
typedef std::true_type empty;
};
/// Partial specialization.
template<typename _First, typename... _Rest>
struct __reflection_typelist<_First, _Rest...>
{
typedef std::false_type empty;
struct first
{
typedef _First type;
};
struct rest
{
typedef __reflection_typelist<_Rest...> type;
};
};
/// Sequence abstraction metafunctions for manipulating a typelist.
/// Enumerate all the base classes of a class. Form of a typelist.
template<typename _Tp>
struct bases
{
typedef __reflection_typelist<__bases(_Tp)...> type;
};
/// Enumerate all the direct base classes of a class. Form of a typelist.
template<typename _Tp>
struct direct_bases
{
typedef __reflection_typelist<__direct_bases(_Tp)...> type;
};
/// @} group metaprogramming
}
_GLIBCXX_END_NAMESPACE_VERSION
}
#endif // _GLIBCXX_TR2_TYPE_TRAITS
|