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
|
//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// <tuple>
// template <class... Types> class tuple;
// template <class... Types>
// class tuple_size<tuple<Types...>>
// : public integral_constant<size_t, sizeof...(Types)> { };
#include <tuple>
#include <type_traits>
template <class T, std::size_t N>
void test()
{
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
std::tuple_size<T> >::value), "");
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
std::tuple_size<const T> >::value), "");
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
std::tuple_size<volatile T> >::value), "");
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
std::tuple_size<const volatile T> >::value), "");
}
int main()
{
test<std::tuple<>, 0>();
test<std::tuple<int>, 1>();
test<std::tuple<char, int>, 2>();
test<std::tuple<char, char*, int>, 3>();
}
|
