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A bit of a cleanup

db4
Slava Pestov 2008-06-06 01:56:40 -05:00
parent 58dd889379
commit 32a95a79e4
1 changed files with 4 additions and 5 deletions
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9
extra/persistent-vectors/persistent-vectors.factor
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@ -1,7 +1,7 @@
! Based on Clojure's PersistentVector by Rich Hickey.
USING: math accessors kernel sequences.private sequences arrays
combinators parser prettyprint.backend fry debugger ;
combinators parser prettyprint.backend ;
IN: persistent-vectors
ERROR: empty-error pvec ;
@ -64,7 +64,6 @@ M: persistent-vector nth-unsafe
swap 1array >>children ;
: 2node ( first second -- node )
2dup [ level>> ] bi@ assert=
[ 2array ] [ drop level>> 1+ ] 2bi node boa ;
: new-child ( new-child node -- node' expansion/f )
@ -102,9 +101,9 @@ M: persistent-vector ppush ( obj pvec -- pvec' )
clone [ new-nth ] change-children ;
: node-change-nth ( i node quot -- node' )
[ clone ] dip '[
clone [ , change-nth ] keep
] change-children ; inline
[ clone ] dip [
[ clone ] dip [ change-nth ] 2keep drop
] curry change-children ; inline
: (new-nth) ( val i node -- node' )
dup level>> 0 = [