42 lines
1.2 KiB
Factor
42 lines
1.2 KiB
Factor
! Copyright (C) 2004, 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors classes classes.algebra classes.algebra.private
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words kernel kernel.private namespaces sequences math
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math.private combinators assocs quotations ;
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IN: classes.builtin
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SYMBOL: builtins
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PREDICATE: builtin-class < class
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"metaclass" word-prop builtin-class eq? ;
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: class>type ( class -- n ) "type" word-prop ; foldable
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: type>class ( n -- class ) builtins get-global nth ;
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: bootstrap-type>class ( n -- class ) builtins get nth ;
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M: object class tag type>class ; inline
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M: builtin-class rank-class drop 0 ;
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GENERIC: define-builtin-predicate ( class -- )
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M: builtin-class define-builtin-predicate
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dup class>type [ eq? ] curry [ tag ] prepend define-predicate ;
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M: builtin-class instance? [ tag ] [ class>type ] bi* eq? ;
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M: builtin-class (flatten-class) dup set ;
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M: builtin-class (classes-intersect?)
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{
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{ [ 2dup eq? ] [ 2drop t ] }
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{ [ over builtin-class? ] [ 2drop f ] }
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[ swap classes-intersect? ]
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} cond ;
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: full-cover ( -- ) builtins get [ (flatten-class) ] each ;
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M: anonymous-complement (flatten-class) drop full-cover ;
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