topological-sort-failed? ( object -- ? )

Vocabulary

classes.algebra

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the topological-sort-failed class.

Definition

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

IN: classes.algebra

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