context-modifier? ( object -- ? )

Vocabulary

compiler.cfg.save-contexts

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the context-modifier class.

Definition

USING: classes.tuple.private compiler.cfg.instructions kernel
math.private slots.private ;

IN: compiler.cfg.save-contexts

: context-modifier? ( object -- ? )
    dup tuple? [
        layout-of
        dup
        dup
        1
        slot
        13
        fixnum>=
        [ 13 slot \ ##phi eq? ]
        [ drop f ]
        if
        [ drop t ]
        [
            dup dup 1 slot 11 fixnum>=
            [ 11 slot \ ##callback-inputs eq? ] [ drop f ] if
            [ drop t ] [
                dup
                1
                slot
                9
                fixnum>=
                [ 9 slot \ ##inc eq? ]
                [ drop f ]
                if
            ] if
        ]
        if
    ] [ drop f ] if ;