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 // UNSUPPORTED: c++03, c++11, c++14, c++17 10 11 // <memory> 12 13 // allocator: 14 // T* allocate(size_t n); 15 16 #include <memory> 17 18 struct incomplete; 19 20 void f() { 21 { 22 std::allocator<int> a; 23 a.allocate(3); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} 24 } 25 { 26 std::allocator<void> a; 27 [[maybe_unused]] auto b = 28 a.allocate(3); // expected-error@*:* {{invalid application of 'sizeof' to an incomplete type 'void'}} 29 } 30 { 31 std::allocator<incomplete> a; 32 [[maybe_unused]] auto b = 33 a.allocate(3); // expected-error@*:* {{invalid application of 'sizeof' to an incomplete type 'incomplete'}} 34 } 35 } 36