Identical to, or derived from true_type if an allocator of parameterized ALLOCATOR_TYPE should be copied when a container using that ALLOCATOR_TYPE is copy-assigned; otherwise identical to or derived from false_type. This type is ALLOCATOR_TYPE::propagate_on_container_copy_assignment if such a type is defined, and false_type otherwise.
Declared in <bslma_allocatortraits.h>
typedef BloombergLP::bslma::AllocatorTraits_PropOnCopyAssign<ALLOCATOR_TYPE>::type propagate_on_container_copy_assignment;