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 24 namespace ex = std::experimental::pmr; 25 26 int 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
