turtle? ( object -- ? )

Vocabulary

L-system

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the turtle class.

Definition

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

IN: L-system

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