Returns a dynamically-typed CSharedAllocator built around a given statically-
typed allocator a of type A. Passing a pointer to the allocator
creates a dynamic allocator around the allocator pointed to by the pointer,
without attempting to copy or move it. Passing the allocator by value or
reference behaves as follows.
If A has no state, the resulting object is allocated in static
shared storage.
If A has state and is copyable, the result will store a copy of it
within. The result itself is allocated in its own statically-typed allocator.
If A has state and is not copyable, the result will move the
passed-in argument into the result. The result itself is allocated in its own
statically-typed allocator.
Returns a dynamically-typed CSharedAllocator built around a given statically- typed allocator a of type A. Passing a pointer to the allocator creates a dynamic allocator around the allocator pointed to by the pointer, without attempting to copy or move it. Passing the allocator by value or reference behaves as follows.