invalid-cursor? ( object -- ? )

Vocabulary

cursors

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the invalid-cursor class.

Definition

USING: classes.tuple.private kernel slots.private ;

IN: cursors

: invalid-cursor? ( object -- ? )
    dup tuple?
    [ layout-of 7 slot \ invalid-cursor eq? ] [ drop f ] if ;