Marek Kurdej 43e4214173 [libc++] [C++2b] [P1682] Add to_underlying.
* https://wg21.link/P1682

Reviewed By: ldionne, Mordante, #libc

Differential Revision: https://reviews.llvm.org/D97365
2021-03-05 10:31:21 +01:00

25 lines
796 B
C++

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++2a
// [utility.underlying], to_underlying
// template <class T>
// constexpr underlying_type_t<T> to_underlying( T value ) noexcept; // C++2b
#include <utility>
struct S {};
int main(int, char**) {
std::to_underlying(125); // expected-error {{no matching function for call}}
std::to_underlying(S{}); // expected-error {{no matching function for call}}
return 0;
}