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, c++14, c++17, c++20 10 11 // [utility.underlying], to_underlying 12 // template <class T> 13 // constexpr underlying_type_t<T> to_underlying( T value ) noexcept; // C++2b 14 15 #include <utility> 16 17 struct S {}; 18 19 int main(int, char**) { 20 std::to_underlying(125); // expected-error {{no matching function for call}} 21 std::to_underlying(S{}); // expected-error {{no matching function for call}} 22 23 return 0; 24 } 25