1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // REQUIRES: c++experimental 11 // UNSUPPORTED: c++98, c++03 12 13 // <experimental/memory_resource> 14 15 // template <class T> class polymorphic_allocator 16 17 // template <class U> 18 // void polymorphic_allocator<T>::destroy(U * ptr); 19 20 #include <experimental/memory_resource> 21 #include <type_traits> 22 #include <new> 23 #include <cassert> 24 #include <cstdlib> 25 26 namespace ex = std::experimental::pmr; 27 28 int count = 0; 29 30 struct destroyable 31 { 32 destroyable() { ++count; } 33 ~destroyable() { --count; } 34 }; 35 36 int main() 37 { 38 typedef ex::polymorphic_allocator<double> A; 39 { 40 A a; 41 static_assert( 42 std::is_same<decltype(a.destroy((destroyable*)nullptr)), void>::value, 43 ""); 44 } 45 { 46 destroyable * ptr = ::new (std::malloc(sizeof(destroyable))) destroyable(); 47 assert(count == 1); 48 A{}.destroy(ptr); 49 assert(count == 0); 50 std::free(ptr); 51 } 52 } 53
