std::experimental::pmr::polymorphic_allocator<T>::select_on_container_copy_construction
Min standard notice:
Returns a default-constructed polymorphic_allocator object.
# Declarations
polymorphic_allocator select_on_container_copy_construction() const;
(library fundamentals TS)
# Return value
A default-constructed polymorphic_allocator object.
# Notes
polymorphic_allocators do not propagate on container copy construction.