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 10 // TODO: Change to XFAIL once https://github.com/llvm/llvm-project/issues/40340 is fixed 11 // UNSUPPORTED: availability-pmr-missing 12 13 // <memory_resource> 14 15 // template <class T> class polymorphic_allocator 16 17 // memory_resource * 18 // polymorphic_allocator<T>::resource() const 19 20 #include <memory_resource> 21 #include <cassert> 22 23 #include "test_macros.h" 24 main(int,char **)25int main(int, char**) { 26 typedef std::pmr::polymorphic_allocator<void> A; 27 { 28 A const a; 29 ASSERT_SAME_TYPE(decltype(a.resource()), std::pmr::memory_resource*); 30 } 31 { 32 std::pmr::memory_resource* mptr = (std::pmr::memory_resource*)42; 33 A const a(mptr); 34 assert(a.resource() == mptr); 35 } 36 { 37 A const a(nullptr); 38 assert(a.resource() == nullptr); 39 assert(a.resource() == nullptr); 40 } 41 { 42 A const a; 43 assert(a.resource() == std::pmr::get_default_resource()); 44 } 45 { 46 std::pmr::memory_resource* mptr = (std::pmr::memory_resource*)42; 47 std::pmr::set_default_resource(mptr); 48 A const a; 49 assert(a.resource() == mptr); 50 assert(a.resource() == std::pmr::get_default_resource()); 51 } 52 53 return 0; 54 } 55