Function: primitive-function-p

primitive-function-p is a byte-compiled function defined in subr.el.gz.

Signature

(primitive-function-p OBJECT)

Documentation

Return t if OBJECT is a built-in primitive function.

This excludes special forms, since they are not functions.

View in manual

Probably introduced at or before Emacs version 30.1.

Source Code

;; Defined in /usr/src/emacs/lisp/subr.el.gz
(defsubst primitive-function-p (object)
  "Return t if OBJECT is a built-in primitive function.
This excludes special forms, since they are not functions."
  (declare (side-effect-free error-free))
  (and (subrp object)
       (not (or (native-comp-function-p object)
                (eq (cdr (subr-arity object)) 'unevalled)))))