diff -r de701b64a4e0 -r 6af86ba1208f main_testing3/re_test6.scala
--- a/main_testing3/re_test6.scala	Thu Nov 03 11:30:09 2022 +0000
+++ b/main_testing3/re_test6.scala	Tue Nov 08 00:27:47 2022 +0000
@@ -1,9 +1,10 @@
 import M3._
 
-val EVIL_urban = SEQ(STAR(STAR(CHAR('a'))), CHAR('b'))
-
-
-assert(simp(Iterator.iterate(ONE:Rexp)(r => SEQ(r, ONE | ONE)).drop(50).next) == ONE)
-assert(simp(Iterator.iterate(ONE:Rexp)(r => ALT(r, r)).drop(20).next) == ONE)
-assert(matcher(EVIL_urban, "a" * 1000000) == false)
-assert(matcher(EVIL_urban, "a" * 1000000 ++ "b") == true)
+assert(SEQs_smart(Nil) == ONE)
+assert(SEQs_smart(List(ZERO)) == ZERO)
+assert(SEQs_smart(List(CHAR('a'))) == CHAR('a'))
+assert(SEQs_smart(List(ONE ~ ONE)) == ONE ~ ONE)
+assert(SEQs_smart(List(ONE, ONE)) == SEQs(List(ONE, ONE)))
+assert(ALTs_smart(Nil) == ZERO)
+assert(ALTs_smart(List(ONE ~ ONE)) == ONE ~ ONE)
+assert(ALTs_smart(List(ZERO, ZERO)) == ALTs(List(ZERO, ZERO)))