libcxx/test/std/utilities/utility/utility.underlying/to_underlying.verify.cpp

   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++23
  14
  15 #include <utility>
  16
  17 struct S {};
  18
  19 void f() {
  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 }