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 // <array> 10 11 // class array 12 13 // bool empty() const noexcept; 14 15 // UNSUPPORTED: c++03, c++11, c++14, c++17 16 17 #include <array> 18 19 #include "test_macros.h" 20 21 int main(int, char**) 22 { 23 24 std::array<int, 1> c; 25 c.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} 26 std::array<int, 0> c0; 27 c0.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} 28 29 return 0; 30 } 31