1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <utility>
11
12// template<class T, T... I>
13// struct integer_sequence
14// {
15//     typedef T type;
16//
17//     static constexpr size_t size() noexcept;
18// };
19
20#include <utility>
21#include <type_traits>
22#include <cassert>
23
24int main()
25{
26#if _LIBCPP_STD_VER > 11
27
28//  Make a few of sequences
29    using int3    = std::integer_sequence<int, 3, 2, 1>;
30    using size1   = std::integer_sequence<size_t, 7>;
31    using ushort2 = std::integer_sequence<unsigned short, 4, 6>;
32    using bool0   = std::integer_sequence<bool>;
33
34//  Make sure they're what we expect
35    static_assert ( std::is_same<int3::value_type, int>::value, "int3 type wrong" );
36    static_assert ( int3::size() == 3, "int3 size wrong" );
37
38    static_assert ( std::is_same<size1::value_type, size_t>::value, "size1 type wrong" );
39    static_assert ( size1::size() == 1, "size1 size wrong" );
40
41    static_assert ( std::is_same<ushort2::value_type, unsigned short>::value, "ushort2 type wrong" );
42    static_assert ( ushort2::size() == 2, "ushort2 size wrong" );
43
44    static_assert ( std::is_same<bool0::value_type, bool>::value, "bool0 type wrong" );
45    static_assert ( bool0::size() == 0, "bool0 size wrong" );
46
47#endif  // _LIBCPP_STD_VER > 11
48}
49