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
|
// { dg-do compile { target c++11 } }
//
// Copyright (C) 2011-2020 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.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// NB: Don't include any other headers in this file.
// LWG 2212 requires <array> to define tuple_element<cv T> specializations.
#include <array>
void
test01()
{
using std::array;
using std::tuple_element;
// This relies on the fact that <utility> includes <type_traits>:
using std::is_same;
const std::size_t len = 3;
typedef array<int, len> array_type;
static_assert(is_same<tuple_element<0, array_type>::type, int>::value, "" );
static_assert(is_same<tuple_element<1, array_type>::type, int>::value, "" );
static_assert(is_same<tuple_element<2, array_type>::type, int>::value, "");
static_assert(is_same<tuple_element<0, const array_type>::type,
const int>::value, "");
static_assert(is_same<tuple_element<1, const array_type>::type,
const int>::value, "");
static_assert(is_same<tuple_element<2, const array_type>::type,
const int>::value, "");
static_assert(is_same<tuple_element<0, volatile array_type>::type,
volatile int>::value, "");
static_assert(is_same<tuple_element<1, volatile array_type>::type,
volatile int>::value, "");
static_assert( (is_same<tuple_element<2, volatile array_type>::type,
volatile int>::value == true), "" );
static_assert(is_same<tuple_element<0, const volatile array_type>::type,
const volatile int>::value, "");
static_assert(is_same<tuple_element<1, const volatile array_type>::type,
const volatile int>::value, "");
static_assert(is_same<tuple_element<2, const volatile array_type>::type,
const volatile int>::value, "");
}
int main()
{
test01();
return 0;
}
|
