undefined-derivative? ( object -- ? )

Vocabulary

math.derivatives

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the undefined-derivative class.

Definition

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

IN: math.derivatives

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