one-variable-only? ( object -- ? )

Vocabulary

namespaces.extras

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the one-variable-only class.

Definition

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

IN: namespaces.extras

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