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// memory_resource * 18// polymorphic_allocator<T>::resource() const 19 20#include <experimental/memory_resource> 21#include <type_traits> 22#include <cassert> 23 24namespace ex = std::experimental::pmr; 25 26int main() 27{ 28 typedef ex::polymorphic_allocator<void> A; 29 { 30 A const a; 31 static_assert( 32 std::is_same<decltype(a.resource()), ex::memory_resource*>::value 33 , "" 34 ); 35 } 36 { 37 ex::memory_resource * mptr = (ex::memory_resource*)42; 38 A const a(mptr); 39 assert(a.resource() == mptr); 40 } 41 { 42 A const a(nullptr); 43 assert(a.resource() == nullptr); 44 assert(a.resource() == nullptr); 45 } 46 { 47 A const a; 48 assert(a.resource() == ex::get_default_resource()); 49 } 50 { 51 ex::memory_resource * mptr = (ex::memory_resource*)42; 52 ex::set_default_resource(mptr); 53 A const a; 54 assert(a.resource() == mptr); 55 assert(a.resource() == ex::get_default_resource()); 56 } 57} 58