Polymorphic wrapper around an STL-style allocator.
Declared in <bslma_allocatoradaptor.h>
template<class STL_ALLOC>
using AllocatorAdaptor = /* implementation-defined */;
Note that AllocatorAdaptor::Type is the same type regardless of whether or not the compiler supports alias templates. It should be used, therefore, whenever the exact type of the adaptor is important.