19 lines
480 B
Factor
19 lines
480 B
Factor
! Copyright (C) 2008, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors kernel models sequences ;
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IN: models.arrow
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TUPLE: arrow < model quot ;
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: <arrow> ( model quot -- arrow )
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f arrow new-model
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swap >>quot
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[ add-dependency ] keep ;
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M: arrow model-changed
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[ [ value>> ] [ quot>> ] bi* call( old -- new ) ]
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[ set-model ] bi ;
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M: arrow model-activated
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[ dependencies>> ] keep [ model-changed ] curry each ;
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