objc:objc-class-method-signature

(objc:objc-class-method-signature class-spec method-name)

Three values describing a method of a class (a name, a class pointer, or an object whose class is meant): the argument types, receiver and selector included, the result type, and the runtime's type encoding. The instance method is preferred to a class method of the same name; nil when neither exists. 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> (objc:objc-class-method-signature "NSString" "rangeOfString:")
(OBJC:OBJC-OBJECT-POINTER OBJC:SEL OBJC:OBJC-OBJECT-POINTER)
(:STRUCT COCOA:NS-RANGE)
"{_NSRange=QQ}24@0:8@16"