Function: car-safe

car-safe is a function defined in data.c.

Signature

(car-safe OBJECT)

Documentation

Return the car of OBJECT if it is a cons cell, or else nil.

Other relevant functions are documented in the list group.

Probably introduced at or before Emacs version 14.

Shortdoc

;; list
(car-safe '(one two three))
    => one

Source Code

// Defined in /usr/src/emacs/src/data.c
{
  return CAR_SAFE (object);
}