objc:objc-object-pointer

(objc:objc-object-pointer object)

The pointer of an object: a pointer answers itself, an objc:standard-objc-object its Objective-C object's pointer, and a class objc:define-objc-class defined ((find-class 'my-object)) its Objective-C class. objc:objc-object-pointer is also the type of every Objective-C object value. Part of the macOS-only objc package -- the interpreter (java -jar, or the rontolisp native binary), a compiled .class / .jar and a --native executable for macOS on Apple silicon, never a .wasm; on a machine without the runtime it signals an error. See the macOS GUI guide.

CL-USER> (eq (objc:objc-object-pointer *s*) *s*)
T
CL-USER> (typep *s* 'objc:objc-object-pointer)
T