| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // polymorphic_allocator |
| // polymorphic_allocator<T>::select_on_container_copy_construction() const |
| |
| #include <experimental/memory_resource> |
| #include <type_traits> |
| #include <cassert> |
| |
| namespace ex = std::experimental::pmr; |
| |
| int main() |
| { |
| typedef ex::polymorphic_allocator<void> A; |
| { |
| A const a; |
| static_assert( |
| std::is_same<decltype(a.select_on_container_copy_construction()), A>::value, |
| ""); |
| } |
| { |
| ex::memory_resource * mptr = (ex::memory_resource*)42; |
| A const a(mptr); |
| assert(a.resource() == mptr); |
| A const other = a.select_on_container_copy_construction(); |
| assert(other.resource() == ex::get_default_resource()); |
| assert(a.resource() == mptr); |
| } |
| { |
| ex::memory_resource * mptr = (ex::memory_resource*)42; |
| ex::set_default_resource(mptr); |
| A const a(nullptr); |
| assert(a.resource() == nullptr); |
| A const other = a.select_on_container_copy_construction(); |
| assert(other.resource() == ex::get_default_resource()); |
| assert(other.resource() == mptr); |
| assert(a.resource() == nullptr); |
| } |
| } |