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 
11 // <utility>
12 
13 // template<class T, T... I>
14 // struct integer_sequence
15 // {
16 //     typedef T type;
17 //
18 //     static constexpr size_t size() noexcept;
19 // };
20 
21 // This test is a conforming extension.  The extension turns undefined behavior
22 //  into a compile-time error.
23 
24 #include <utility>
25 
26 #include "test_macros.h"
27 
28 int main(int, char**) {
29     // Should fail to compile, since float is not an integral type
30     using floatmix = std::integer_sequence<float>;
31     floatmix::value_type I;
32     return 0;
33 }
34