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Update lindenmayer to not use lists

darcs
wayo.cavazos 2006-08-24 03:37:36 +00:00
parent 4ba810d7f7
commit f5e5777b8d
1 changed files with 6 additions and 6 deletions
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12
contrib/x11/examples/lindenmayer/lindenmayer.factor
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@ -1,5 +1,5 @@
USING: kernel alien namespaces arrays vectors math opengl math-contrib
lists parser sequences hashtables strings ;
parser sequences hashtables strings ;
IN: lindenmayer
@ -127,13 +127,13 @@ SYMBOL: rules
: segment ( str -- seq )
{ { [ dup "" = ] [ drop [ ] ] }
{ [ dup length* 1 = ] [ f cons ] }
{ [ dup 1 swap nth CHAR: ( = ]
[ dup CHAR: ) swap index 1 +
{ [ dup length* 1 = ] [ unit ] }
{ [ 1 over nth CHAR: ( = ]
[ CHAR: ) over index 1 + ! str i
2dup head ! str i head
-rot tail ! head tail
segment cons ] }
{ [ t ] [ dup 1 head swap 1 tail segment cons ] } }
segment swap add* ] }
{ [ t ] [ dup 1 head swap 1 tail segment swap add* ] } }
cond ;
: lookup ( str -- str ) dup 1 head rules get hash dup [ nip ] [ drop ] if ;