std::pmr::polymorphic_allocator<T>:: select_on_container_copy_construction
| polymorphic_allocator select_on_container_copy_construction() const; | (since C++17) | 
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.
See also
| [static] | obtains the allocator to use after copying a standard container (public static member function of std::allocator_traits<Alloc>) | 
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