165 lines
4.4 KiB
Factor
165 lines
4.4 KiB
Factor
! Copyright (C) 2007, 2008 Daniel Ehrenberg
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! Portions copyright (C) 2009 Slava Pestov
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors arrays assocs classes.tuple definitions generic
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generic.standard hashtables kernel lexer math parser
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generic.parser sequences sets slots words words.symbol fry
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compiler.units ;
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IN: delegate
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<PRIVATE
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: protocol-words ( protocol -- words )
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\ protocol-words word-prop ;
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: protocol-consult ( protocol -- consulters )
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\ protocol-consult word-prop ;
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GENERIC: group-words ( group -- words )
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M: standard-generic group-words
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dup "combination" word-prop #>> 2array 1array ;
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M: tuple-class group-words
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all-slots [
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name>>
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[ reader-word 0 2array ]
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[ writer-word 0 2array ] bi
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2array
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] map concat ;
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! Consultation
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TUPLE: consultation group class quot loc ;
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: <consultation> ( group class quot -- consultation )
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f consultation boa ;
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: create-consult-method ( word consultation -- method )
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[ class>> swap first create-method dup fake-definition ] keep
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[ drop ] [ "consultation" set-word-prop ] 2bi ;
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PREDICATE: consult-method < method-body "consultation" word-prop ;
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M: consult-method reset-word
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[ call-next-method ] [ f "consultation" set-word-prop ] bi ;
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: consult-method-quot ( quot word -- object )
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[ second [ [ dip ] curry ] times ] [ first ] bi
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'[ _ call _ execute ] ;
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: consult-method ( word consultation -- )
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[ create-consult-method ]
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[ quot>> swap consult-method-quot ] 2bi
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define ;
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: change-word-prop ( word prop quot -- )
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[ swap props>> ] dip change-at ; inline
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: each-generic ( consultation quot -- )
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[ [ group>> group-words ] keep ] dip curry each ; inline
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: register-consult ( consultation -- )
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[ group>> \ protocol-consult ] [ ] [ class>> ] tri
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'[ [ _ _ ] dip ?set-at ] change-word-prop ;
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: consult-methods ( consultation -- )
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[ consult-method ] each-generic ;
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: unregister-consult ( consultation -- )
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[ class>> ] [ group>> ] bi
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\ protocol-consult word-prop delete-at ;
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: unconsult-method ( word consultation -- )
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[ class>> swap first method ] keep
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over [
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over "consultation" word-prop eq?
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[ forget ] [ drop ] if
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] [ 2drop ] if ;
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: unconsult-methods ( consultation -- )
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[ unconsult-method ] each-generic ;
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PRIVATE>
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: define-consult ( consultation -- )
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[ register-consult ] [ consult-methods ] bi ;
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SYNTAX: CONSULT:
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scan-word scan-word parse-definition <consultation>
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[ save-location ] [ define-consult ] bi ;
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M: consultation where loc>> ;
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M: consultation set-where (>>loc) ;
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M: consultation forget*
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[ unconsult-methods ] [ unregister-consult ] bi ;
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! Protocols
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<PRIVATE
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: cross-2each ( seq1 seq2 quot -- )
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[ with each ] 2curry each ; inline
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: forget-all-methods ( classes words -- )
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[ first method forget ] cross-2each ;
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: protocol-users ( protocol -- users )
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protocol-consult keys ;
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: lost-words ( protocol wordlist -- lost-words )
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[ protocol-words ] dip diff ;
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: forget-old-definitions ( protocol new-wordlist -- )
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[ drop protocol-users ] [ lost-words ] 2bi
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forget-all-methods ;
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: added-words ( protocol wordlist -- added-words )
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swap protocol-words diff ;
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: add-new-definitions ( protocol wordlist -- )
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[ drop protocol-consult values ] [ added-words ] 2bi
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[ swap consult-method ] cross-2each ;
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: initialize-protocol-props ( protocol wordlist -- )
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[
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drop \ protocol-consult
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[ H{ } assoc-like ] change-word-prop
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] [ { } like \ protocol-words set-word-prop ] 2bi ;
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: fill-in-depth ( wordlist -- wordlist' )
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[ dup word? [ 0 2array ] when ] map ;
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: show-words ( wordlist' -- wordlist )
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[ dup second zero? [ first ] when ] map ;
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PRIVATE>
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: define-protocol ( protocol wordlist -- )
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[ drop define-symbol ] [
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fill-in-depth
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[ forget-old-definitions ]
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[ add-new-definitions ]
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[ initialize-protocol-props ] 2tri
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] 2bi ;
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SYNTAX: PROTOCOL:
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CREATE-WORD parse-definition define-protocol ;
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PREDICATE: protocol < word protocol-words ; ! Subclass of symbol?
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M: protocol forget*
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[ f forget-old-definitions ] [ call-next-method ] bi ;
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M: protocol definition protocol-words show-words ;
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M: protocol definer drop \ PROTOCOL: \ ; ;
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M: protocol group-words protocol-words ;
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SYNTAX: SLOT-PROTOCOL:
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CREATE-WORD ";" parse-tokens
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[ [ reader-word ] [ writer-word ] bi 2array ] map concat
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define-protocol ; |