Eric Fiselier | 257fd69 | 2016-05-07 01:04:55 +0000 | [diff] [blame] | 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 | // UNSUPPORTED: c++98, c++03 |
| 11 | |
| 12 | // <experimental/memory_resource> |
| 13 | |
| 14 | // template <class T> class polymorphic_allocator |
| 15 | |
| 16 | // memory_resource * |
| 17 | // polymorphic_allocator<T>::resource() const |
| 18 | |
| 19 | #include <experimental/memory_resource> |
| 20 | #include <type_traits> |
| 21 | #include <cassert> |
| 22 | |
| 23 | namespace ex = std::experimental::pmr; |
| 24 | |
| 25 | int main() |
| 26 | { |
| 27 | typedef ex::polymorphic_allocator<void> A; |
| 28 | { |
| 29 | A const a; |
| 30 | static_assert( |
| 31 | std::is_same<decltype(a.resource()), ex::memory_resource*>::value |
| 32 | , "" |
| 33 | ); |
| 34 | } |
| 35 | { |
| 36 | ex::memory_resource * mptr = (ex::memory_resource*)42; |
| 37 | A const a(mptr); |
| 38 | assert(a.resource() == mptr); |
| 39 | } |
| 40 | { |
| 41 | A const a(nullptr); |
| 42 | assert(a.resource() == nullptr); |
| 43 | assert(a.resource() == nullptr); |
| 44 | } |
| 45 | { |
| 46 | A const a; |
| 47 | assert(a.resource() == ex::get_default_resource()); |
| 48 | } |
| 49 | { |
| 50 | ex::memory_resource * mptr = (ex::memory_resource*)42; |
| 51 | ex::set_default_resource(mptr); |
| 52 | A const a; |
| 53 | assert(a.resource() == mptr); |
| 54 | assert(a.resource() == ex::get_default_resource()); |
| 55 | } |
| 56 | } |