factor/library/generic/null.factor

! Copyright (C) 2004, 2005 Slava Pestov.
! See http://factor.sf.net/license.txt for BSD license.
IN: generic
USING: kernel words ;

! Null metaclass with no instances.
null { } "types" set-word-prop
null [ drop f ] "predicate" set-word-prop
null null define-class
0.72 ready for release 2005-02-18 20:37:01 -05:00			`! Copyright (C) 2004, 2005 Slava Pestov.`
			`! See http://factor.sf.net/license.txt for BSD license.`
faster generic arithmetic, messing around with inference 2005-01-16 17:58:28 -05:00			`IN: generic`
0.72 ready for release 2005-02-18 20:37:01 -05:00			`USING: kernel words ;`
faster generic arithmetic, messing around with inference 2005-01-16 17:58:28 -05:00
			`! Null metaclass with no instances.`
clean up metaclasses 2005-08-14 18:13:16 -04:00			`null { } "types" set-word-prop`
renaming word-parameter to word-def; renaming word-property to word-prop 2005-03-05 14:45:23 -05:00			`null [ drop f ] "predicate" set-word-prop`
faster generic arithmetic, messing around with inference 2005-01-16 17:58:28 -05:00			`null null define-class`