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Proto-allocator requirements

A type A meets the proto-allocator requirements if A is CopyConstructible (C++Std [copyconstructible]), Destructible (C++Std [destructible]), and allocator_traits<A>::rebind_alloc<U> meets the allocator requirements (C++Std [allocator.requirements]), where U is an object type. [Note: For example, std::allocator<void> meets the proto-allocator requirements but not the allocator requirements. —end note] No constructor, comparison operator, copy operation, move operation, or swap operation on these types shall exit via an exception.


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