std::pmr::polymorphic_allocator<T>::select_on_container_copy_construction
Since C++17
polymorphic_allocator select_on_container_copy_construction() const;
Returns a default-constructed polymorphic_allocator object.
Parameters
(none)
Return Value
A default-constructed polymorphic_allocator object.
Notes
polymorphic_allocators do not propagate on container copy construction.