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 // [[nodiscard]] void* operator new[](std::size_t); 10 // [[nodiscard]] void* operator new[](std::size_t, std::nothrow_t const&); 11 // [[nodiscard]] void* operator new[](std::size_t, std::align_val_t); 12 // [[nodiscard]] void* operator new[](std::size_t, std::align_val_t, std::nothrow_t const&); 13 14 // [[nodiscard]] is not supported at all in c++03 15 // UNSUPPORTED: c++03 16 17 // [[nodiscard]] enabled before C++20 in libc++ as an extension 18 // UNSUPPORTED: (c++11 || c++14 || c++17) && !stdlib=libc++ 19 20 // We get availability markup errors when aligned allocation is missing 21 // XFAIL: availability-aligned_allocation-missing 22 23 // Libc++ when built for z/OS doesn't contain the aligned allocation functions, 24 // nor does the dynamic library shipped with z/OS. 25 // UNSUPPORTED: target={{.+}}-zos{{.*}} 26 27 #include <new> 28 29 #include "test_macros.h" 30 31 void f() { 32 ::operator new[](4); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} 33 ::operator new[](4, std::nothrow); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} 34 35 #if TEST_STD_VER >= 17 36 ::operator new[](4, std::align_val_t{4}); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} 37 ::operator new[](4, std::align_val_t{4}, std::nothrow); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} 38 #endif 39 } 40