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
|
//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11
// <experimental/tuple>
// template <class T> constexpr size_t tuple_size_v = tuple_size<T>::value;
#include <experimental/tuple>
#include <utility>
#include <array>
namespace ex = std::experimental;
template <class Tuple, int Expect>
void test()
{
static_assert(ex::tuple_size_v<Tuple> == Expect, "");
static_assert(ex::tuple_size_v<Tuple> == std::tuple_size<Tuple>::value, "");
static_assert(ex::tuple_size_v<Tuple const> == std::tuple_size<Tuple>::value, "");
static_assert(ex::tuple_size_v<Tuple volatile> == std::tuple_size<Tuple>::value, "");
static_assert(ex::tuple_size_v<Tuple const volatile> == std::tuple_size<Tuple>::value, "");
}
int main()
{
test<std::tuple<>, 0>();
test<std::tuple<int>, 1>();
test<std::array<int, 1>, 1>();
test<std::tuple<int, int>, 2>();
test<std::pair<int, int>, 2>();
test<std::array<int, 2>, 2>();
test<std::tuple<int, int, int>, 3>();
test<std::array<int, 3>, 3>();
}
|
