vl-consp (AutoLISP)

(vl-consp  list-variable)

The vl-consp function determines whether a variable contains a valid list definition.

Arguments

list-variable

A list.

Return Values

T, if list-variable is a list and is not nil; otherwise nil.

Examples

(vl-consp nil)
nil

(vl-consp t)
nil

(vl-consp (cons 0 "LINE"))
T