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 // This test is a conforming extension. The extension turns undefined behavior
21 // into a compile-time error.
22
23 #include <utility>
24
25 #include "test_macros.h"
26
main()27 int main()
28 {
29 #if TEST_STD_VER > 11
30
31 // Should fail to compile, since float is not an integral type
32 using floatmix = std::integer_sequence<float>;
33 floatmix::value_type I;
34
35 #else
36
37 X
38
39 #endif // TEST_STD_VER > 11
40 }
41