box? ( object -- ? )

Vocabulary

regexp.compiler.private

Inputs and outputs

object	an object
?	a boolean

Word description

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

Definition

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

IN: regexp.compiler.private

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