| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // REQUIRES: c++experimental |
| // UNSUPPORTED: c++98, c++03 |
| |
| // <experimental/memory_resource> |
| |
| // template <class T> class polymorphic_allocator |
| |
| // template <class U> |
| // void polymorphic_allocator<T>::destroy(U * ptr); |
| |
| #include <experimental/memory_resource> |
| #include <type_traits> |
| #include <new> |
| #include <cassert> |
| #include <cstdlib> |
| |
| namespace ex = std::experimental::pmr; |
| |
| int count = 0; |
| |
| struct destroyable |
| { |
| destroyable() { ++count; } |
| ~destroyable() { --count; } |
| }; |
| |
| int main() |
| { |
| typedef ex::polymorphic_allocator<double> A; |
| { |
| A a; |
| static_assert( |
| std::is_same<decltype(a.destroy((destroyable*)nullptr)), void>::value, |
| ""); |
| } |
| { |
| destroyable * ptr = ::new (std::malloc(sizeof(destroyable))) destroyable(); |
| assert(count == 1); |
| A{}.destroy(ptr); |
| assert(count == 0); |
| std::free(ptr); |
| } |
| } |