Structural Informatics Group (SIG) logo
Home | Projects | Demos | Downloads | Publications | Local Info | About Us | New site
Go to the first, previous, next, last section, table of contents.

objectp

objectp

type: predicate function (subr)
location: built-in
source file: xlbfun.c
Common LISP compatible: no
supported on: all machines

SYNTAX

(objectp  <expr> )
        <expr>          -       the expression to check

DESCRIPTION

The OBJECTP predicate checks if the <expr> is an object. T is returned if <expr> is an object, NIL is returned otherwise.

EXAMPLES

(objectp object)                        ; returns T
(objectp class)                         ; returns T
(objectp NIL)                           ; returns NIL
(objectp '(a b))                        ; returns NIL


Go to the first, previous, next, last section, table of contents.