16 lines
329 B
Factor
16 lines
329 B
Factor
! Copyright (C) 2004, 2005 Slava Pestov.
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! See http://factor.sf.net/license.txt for BSD license.
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IN: generic
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USING: kernel words ;
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! Null metaclass with no instances.
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SYMBOL: null
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null { } "types" set-word-prop
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null [ 2drop 2drop ] "add-method" set-word-prop
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null [ drop f ] "predicate" set-word-prop
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null null define-class
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