16 lines
546 B
Factor
16 lines
546 B
Factor
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USING: accessors models models.arrow inverse inverse.vectors kernel ;
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IN: models.illusion
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TUPLE: illusion < arrow ;
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: <illusion> ( model quot -- illusion )
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illusion new V{ } clone >>connections V{ } clone >>dependencies 0 >>ref
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swap >>quot over >>model [ add-dependency ] keep ;
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: backtalk ( value object -- ) [ quot>> [undo] call( a -- b ) ] [ model>> ] bi (>>value) ;
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IN: accessors
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M: illusion (>>value) ( value object -- ) swap throw [ call-next-method ] 2keep
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dup [ quot>> ] [ model>> ] bi and
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[ backtalk ]
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[ 2drop ] if ;
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