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When applied to pointer objects:
eq? is true only if the two arguments are
both pointers and they refer to the same Scheme storage location.
eqv? and equal? is true only if the
two arguments are both pointers and they reference the same raw memory
location.
pointers also have pointer=? as specialised comparison predicate.
The following bindings are exported by the libraries (vicare)
and (vicare system $foreign) and reexported by the library
(vicare ffi).
Compare the pointer arguments as indicated by the name.
The arguments must be pointers. Return #t if the arguments are all
different: no two arguments are equal; otherwise return #f. When
applied to a single argument: return #f.
Return the maximal or minimal pointer argument according to
pointer<?.