29 lines
716 B
Factor
29 lines
716 B
Factor
! Copyright (C) 2007, 2009 Slava Pestov.
|
|
! See http://factorcode.org/license.txt for BSD license.
|
|
USING: parser kernel sequences words effects combinators assocs
|
|
definitions quotations namespaces memoize accessors ;
|
|
IN: macros
|
|
|
|
<PRIVATE
|
|
|
|
: real-macro-effect ( word -- effect' )
|
|
stack-effect in>> 1 <effect> ;
|
|
|
|
PRIVATE>
|
|
|
|
: define-macro ( word definition -- )
|
|
[ "macro" set-word-prop ]
|
|
[ over real-macro-effect memoize-quot [ call ] append define ]
|
|
2bi ;
|
|
|
|
SYNTAX: MACRO: (:) define-macro ;
|
|
|
|
PREDICATE: macro < word "macro" word-prop >boolean ;
|
|
|
|
M: macro definer drop \ MACRO: \ ; ;
|
|
|
|
M: macro definition "macro" word-prop ;
|
|
|
|
M: macro reset-word
|
|
[ call-next-method ] [ f "macro" set-word-prop ] bi ;
|