Mark de Wever 71400505ca [libc++] Updates C++2b to C++23.
During the ISO C++ Committee meeting plenary session the C++23 Standard
has been voted as technical complete.

This updates the reference to c++2b to c++23 and updates the __cplusplus
macro.

Note since we use clang-tidy 16 a small work-around is needed. Clang
knows -std=c++23 but clang-tidy not so for now force the lit compiler
flag to use -std=c++2b instead of -std=c++23.

Reviewed By: #libc, philnik, jloser, ldionne

Differential Revision: https://reviews.llvm.org/D150795
2023-05-23 18:44:41 +02:00

23 lines
770 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++20
// [utility.underlying], to_underlying
// template <class T>
// constexpr underlying_type_t<T> to_underlying( T value ) noexcept; // C++23
#include <utility>
struct S {};
void f() {
std::to_underlying(125); // expected-error {{no matching function for call}}
std::to_underlying(S{}); // expected-error {{no matching function for call}}
}