set? ( object -- ? )
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Vocabulary
sets

Inputs and outputs

object	an object
?	a boolean

Word description
Tests if the object is an instance of the set class.

Definition

USING: bit-sets classes.tuple.private hash-sets
hash-sets.wrapped kernel linked-sets sequences slots.private ;

IN: sets

: set? ( object -- ? )
    dup dup tuple? [
        layout-of
        7
        slot
        dup
        \ linked-set
        eq?
        [ drop t ]
        [
            dup \ wrapped-hash-set eq?
            [ drop t ] [
                dup \ bit-set eq?
                [ drop t ] [ \ hash-set eq? ] if
            ] if
        ]
        if
    ] [ drop f ] if [ drop t ] [ sequence? ] if ;