63 lines
1.5 KiB
Factor
63 lines
1.5 KiB
Factor
! Copyright (C) 2006 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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IN: generic
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USING: arrays definitions errors hashtables help kernel
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sequences words ;
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PREDICATE: array method-spec
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dup length 2 = [
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first2 generic? >r class? r> and
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] [
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drop f
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] if ;
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TUPLE: method def loc ;
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M: f method-def ;
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M: f method-loc ;
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M: quotation method-def ;
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M: quotation method-loc drop f ;
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: method ( class generic -- quot )
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"methods" word-prop hash method-def ;
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: methods ( generic -- alist )
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"methods" word-prop hash>alist
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[ [ first ] 2apply class-compare ] sort
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[ first2 method-def 2array ] map ;
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: order ( generic -- list )
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"methods" word-prop hash-keys [ class-compare ] sort ;
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TUPLE: check-method class generic ;
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: check-method ( class generic -- class generic )
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dup generic? [ <check-method> throw ] unless
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over class? [ <check-method> throw ] unless ;
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: with-methods ( word quot -- )
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swap [ "methods" word-prop swap call ] keep ?make-generic ;
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inline
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: define-method ( method class generic -- )
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>r bootstrap-word r> check-method
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[ set-hash ] with-methods ;
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: implementors ( class -- list )
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[ "methods" word-prop ?hash* nip ] word-subset-with ;
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M: method-spec where
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dup first2 "methods" word-prop hash method-loc
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[ ] [ second where ] ?if ;
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M: method-spec subdefs drop f ;
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M: generic subdefs
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dup order [ swap 2array ] map-with ;
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M: class subdefs
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dup implementors [ 2array ] map-with ;
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M: method-spec forget
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first2 [ remove-hash ] with-methods ;
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