amb-failure? ( object -- ? )

Vocabulary

backtrack

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the amb-failure class.

Definition

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

IN: backtrack

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