unique-deque? ( object -- ? )

Vocabulary

spider.unique-deque

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the unique-deque class.

Definition

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

IN: spider.unique-deque

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