Function: format-proper-list-p

format-proper-list-p is a function alias for proper-list-p, defined in fns.c.

This function is obsolete since 27.1; use proper-list-p instead.

Signature

(format-proper-list-p OBJECT)

Documentation

Return OBJECT's length if it is a proper list, nil otherwise.

A proper list is neither circular nor dotted (i.e., its last cdr is nil).

Probably introduced at or before Emacs version 27.1.

Aliases

format-proper-list-p (obsolete since 27.1)