Nikolas Klauser 7d3bba5e2f [libc++] Add [[nodiscard]] extensions to the functions in <bit>
Reviewed By: #libc, ldionne, Mordante

Spies: Mordante, ldionne, libcxx-commits

Differential Revision: https://reviews.llvm.org/D152653
2023-06-13 08:01:34 -07:00

19 lines
738 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
// Check that std::rotl and std::rotr are marked [[nodiscard]]
#include <bit>
void func() {
std::rotl(0u, 0); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
std::rotr(0u, 0); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
}