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
|
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// type_traits
// void_t
// UNSUPPORTED: c++98, c++03, c++11, c++14
// XFAIL: gcc-5.1 gcc-5.2
#include <type_traits>
template <class T>
void test1()
{
static_assert( std::is_same<void, std::void_t<T>>::value, "");
static_assert( std::is_same<void, std::void_t<const T>>::value, "");
static_assert( std::is_same<void, std::void_t<volatile T>>::value, "");
static_assert( std::is_same<void, std::void_t<const volatile T>>::value, "");
}
template <class T, class U>
void test2()
{
static_assert( std::is_same<void, std::void_t<T, U>>::value, "");
static_assert( std::is_same<void, std::void_t<const T, U>>::value, "");
static_assert( std::is_same<void, std::void_t<volatile T, U>>::value, "");
static_assert( std::is_same<void, std::void_t<const volatile T, U>>::value, "");
static_assert( std::is_same<void, std::void_t<T, const U>>::value, "");
static_assert( std::is_same<void, std::void_t<const T, const U>>::value, "");
static_assert( std::is_same<void, std::void_t<volatile T, const U>>::value, "");
static_assert( std::is_same<void, std::void_t<const volatile T, const U>>::value, "");
}
class Class
{
public:
~Class();
};
int main()
{
static_assert( std::is_same<void, std::void_t<>>::value, "");
test1<void>();
test1<int>();
test1<double>();
test1<int&>();
test1<Class>();
test1<Class[]>();
test1<Class[5]>();
test2<void, int>();
test2<double, int>();
test2<int&, int>();
test2<Class&, bool>();
test2<void *, int&>();
static_assert( std::is_same<void, std::void_t<int, double const &, Class, volatile int[], void>>::value, "");
}
|
