58 lines
1.6 KiB
Factor
58 lines
1.6 KiB
Factor
! Copyright (C) 2007, 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: assocs hashtables kernel sequences generic words
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arrays classes slots slots.private classes.tuple
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classes.tuple.private math vectors quotations accessors
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combinators ;
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IN: mirrors
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TUPLE: mirror { object read-only } ;
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C: <mirror> mirror
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: object-slots ( mirror -- slots ) object>> class all-slots ; inline
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M: mirror at*
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[ nip object>> ] [ object-slots slot-named ] 2bi
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dup [ offset>> slot t ] [ 2drop f f ] if ;
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ERROR: no-such-slot slot ;
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ERROR: read-only-slot slot ;
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: check-set-slot ( val slot -- val offset )
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{
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{ [ dup not ] [ no-such-slot ] }
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{ [ dup read-only>> ] [ read-only-slot ] }
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{ [ 2dup class>> instance? not ] [ class>> bad-slot-value ] }
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[ offset>> ]
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} cond ; inline
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M: mirror set-at ( val key mirror -- )
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[ object-slots slot-named check-set-slot ] [ object>> ] bi
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swap set-slot ;
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M: mirror delete-at ( key mirror -- )
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[ f ] 2dip set-at ;
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M: mirror clear-assoc ( mirror -- )
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[ object>> ] [ object-slots ] bi [
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[ initial>> ] [ offset>> ] bi swapd set-slot
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] with each ;
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M: mirror >alist ( mirror -- alist )
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[ object-slots [ [ name>> ] map ] [ [ offset>> ] map ] bi ]
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[ object>> [ swap slot ] curry ] bi
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map zip ;
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M: mirror assoc-size object>> layout-of second ;
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INSTANCE: mirror assoc
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GENERIC: make-mirror ( obj -- assoc )
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M: hashtable make-mirror ;
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M: integer make-mirror drop f ;
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M: array make-mirror <enum> ;
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M: vector make-mirror <enum> ;
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M: quotation make-mirror <enum> ;
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M: object make-mirror <mirror> ;
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