no-payload? ( object -- ? )

Vocabulary

tools.image-analyzer.data-heap-reader

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the no-payload class.

Definition

USING: classes.tuple.private kernel math.private slots.private
tools.image-analyzer.vm ;

IN: tools.image-analyzer.data-heap-reader

: no-payload? ( object -- ? )
    dup tuple? [
        layout-of
        dup
        1
        slot
        9
        fixnum>=
        [
            9
            slot
            dup
            \ word
            eq?
            [ drop t ]
            [
                dup \ wrapper eq?
                [ drop t ] [
                    dup \ quotation eq?
                    [ drop t ]
                    [ dup \ dll eq? ~quotation~ ~quotation~ if ]
                    if
                ] if
            ]
            if
        ]
        [ drop f ]
        if
    ] [ drop f ] if ;