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 int main() 26 { 27 #if _LIBCPP_STD_VER > 11 28 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 33 #else 34 35 X 36 37 #endif // _LIBCPP_STD_VER > 11 38 } 39
