1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03, c++11
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 <cstddef>
23#include <cassert>
24
25#include "test_macros.h"
26
27int main(int, char**)
28{
29// Make a few of sequences
30 using int3 = std::integer_sequence<int, 3, 2, 1>;
31 using size1 = std::integer_sequence<std::size_t, 7>;
32 using ushort2 = std::integer_sequence<unsigned short, 4, 6>;
33 using bool0 = std::integer_sequence<bool>;
34
35// Make sure they're what we expect
36 static_assert ( std::is_same<int3::value_type, int>::value, "int3 type wrong" );
37 static_assert ( int3::size() == 3, "int3 size wrong" );
38
39 static_assert ( std::is_same<size1::value_type, std::size_t>::value, "size1 type wrong" );
40 static_assert ( size1::size() == 1, "size1 size wrong" );
41
42 static_assert ( std::is_same<ushort2::value_type, unsigned short>::value, "ushort2 type wrong" );
43 static_assert ( ushort2::size() == 2, "ushort2 size wrong" );
44
45 static_assert ( std::is_same<bool0::value_type, bool>::value, "bool0 type wrong" );
46 static_assert ( bool0::size() == 0, "bool0 size wrong" );
47
48 return 0;
49}
50

source code of libcxx/test/std/utilities/intseq/intseq.intseq/integer_seq.pass.cpp