diff -r 663c2a9108d1 -r 4de31fdc0d67 main_testing3/re_test.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main_testing3/re_test.sh	Mon Nov 02 02:31:44 2020 +0000
@@ -0,0 +1,173 @@
+#!/bin/bash
+set -euo pipefail
+
+
+out=${1:-output}
+
+echo -e "" > $out
+
+echo -e "Below is the feedback for your submission of re.scala." >> $out
+echo -e "" >> $out
+
+
+# compilation tests
+
+function scala_compile {
+  (ulimit -t 30; JAVA_OPTS="-Xmx1g" scala -Xprint:parser "$1" 2> c$out 1> c$out)
+}
+
+# functional tests
+
+function scala_assert {
+  (ulimit -t 30; JAVA_OPTS="-Xmx1g" scala -i "$1" -- "$2" -e "" 2> /dev/null 1> /dev/null)
+}
+
+# purity test
+
+function scala_vars {
+   (egrep '\bvar\b|\breturn\b|\.par\.|\.par |ListBuffer|mutable|util.control|new Array' c$out 2> /dev/null 1> /dev/null)
+}
+
+
+
+# compilation test
+
+echo -e "re.scala runs?" >> $out
+
+if (scala_compile re.scala)
+then
+    echo -e "  --> yes" >> $out
+    tsts=$(( 0 ))
+else
+    echo -e "  --> SCALA DID NOT RUN RE.SCALA\n" >> $out
+    tsts=$(( 1 )) 
+fi
+
+# var, return, ListBuffer test
+#
+
+if [ $tsts -eq 0 ]
+then
+    echo -e "re.scala does not contain vars, returns etc?" >> $out
+
+    if (scala_vars re.scala)
+    then
+	echo -e "   --> FAIL (make triple-sure your program conforms to the required format)" >> $out 
+	tsts=$(( 1 ))
+    else
+	echo -e "  --> success" >> $out
+	tsts=$(( 0 )) 
+    fi
+fi
+
+
+
+### re tests
+
+if [ $tsts -eq 0 ]
+then
+  echo -e " nullable(ZERO) == false" >> $out
+  echo -e " nullable(ONE) == true" >> $out
+  echo -e " nullable(CHAR('a')) == false" >> $out
+  echo -e " nullable(ZERO | ONE) == true" >> $out
+  echo -e " nullable(ZERO | CHAR('a')) == false" >> $out
+  echo -e " nullable(ONE ~  ONE) == true" >> $out
+  echo -e " nullable(ONE ~ CHAR('a')) == false" >> $out
+  echo -e " nullable(STAR(ZERO)) == true" >> $out
+  
+  if (scala_assert "re.scala" "re_test1.scala")
+  then
+    echo -e "  --> success" >> $out
+  else
+    echo -e "  --> \n ONE TEST FAILED\n" >> $out
+  fi
+fi
+
+
+
+if [ $tsts -eq 0 ]
+then
+  echo -e " der('a', ZERO | ONE) == (ZERO | ZERO)" >> $out
+  echo -e " der('a', (CHAR('a') | ONE) ~ CHAR('a')) ==" >> $out
+  echo -e "                 ALT((ONE | ZERO) ~ CHAR('a'), ONE)" >> $out
+  echo -e " der('a', STAR(CHAR('a'))) == (ONE ~ STAR(CHAR('a')))" >> $out
+  echo -e " der('b', STAR(CHAR('a'))) == (ZERO ~ STAR(CHAR('a')))" >> $out
+  
+  if (scala_assert "re.scala" "re_test2.scala")
+  then
+    echo -e "  --> success" >> $out
+  else
+    echo -e "  --> \n ONE TEST FAILED\n" >> $out
+  fi
+fi
+
+
+
+if [ $tsts -eq 0 ]
+then
+  echo -e " simp(ZERO | ONE) == ONE" >> $out
+  echo -e " simp(STAR(ZERO | ONE)) == STAR(ZERO | ONE)" >> $out
+  echo -e " simp(ONE ~ (ONE ~ (ONE ~ CHAR('a')))) == CHAR('a')" >> $out
+  echo -e " simp(((ONE ~ ONE) ~ ONE) ~ CHAR('a')) == CHAR('a'))" >> $out
+  echo -e " simp(((ONE | ONE) ~ ONE) ~ CHAR('a')) == CHAR('a'))" >> $out
+  echo -e " simp(ONE ~ (ONE ~ (ONE ~ ZERO))) == ZERO" >> $out
+  echo -e " simp(ALT(ONE ~ (ONE ~ (ONE ~ ZERO)), CHAR('a'))) == CHAR('a')" >> $out
+  echo -e " simp(CHAR('a') | CHAR('a')) == CHAR('a')" >> $out
+  echo -e " simp(CHAR('a') ~ CHAR('a')) == CHAR('a') ~ CHAR('a')" >> $out
+  echo -e " simp(ONE | CHAR('a')) == (ONE | CHAR('a'))" >> $out
+  echo -e " simp(ALT((CHAR('a') | ZERO) ~ ONE," >> $out
+  echo -e "          ((ONE | CHAR('b')) | CHAR('c')) ~ (CHAR('d') ~ ZERO))) == CHAR('a')" >> $out
+  echo -e " simp((ZERO | ((ZERO | ZERO) | (ZERO | ZERO))) ~ ((ONE | ZERO) | ONE ) ~ (CHAR('a'))) == ZERO" >> $out
+  echo -e " simp(ALT(ONE | ONE, ONE | ONE)) == ONE" >> $out
+  echo -e " simp(ALT(ZERO | CHAR('a'), CHAR('a') | ZERO)) == CHAR('a')" >> $out
+  echo -e " simp(ALT(ONE | CHAR('a'), CHAR('a') | ONE)) == ALT(ONE | CHAR('a'), CHAR('a') | ONE)" >> $out
+  if (scala_assert "re.scala" "re_test3.scala")
+  then
+    echo -e "  --> success" >> $out
+  else
+    echo -e "  --> \n ONE TEST FAILED\n" >> $out
+  fi
+fi
+
+
+if [ $tsts -eq 0 ]
+then
+  echo -e " val EVIL = SEQ(STAR(STAR(CHAR('a'))), CHAR('b'))" >> $out
+  echo -e " ders(\"aaaaa\".toList, EVIL) == SEQ(SEQ(STAR(CHAR('a')),STAR(STAR(CHAR('a')))),CHAR('b'))" >> $out
+  echo -e " ders(List('b'), EVIL) == ONE" >> $out
+  echo -e " ders(\"bb\".toList, EVIL) == ZERO" >> $out
+  echo -e " matcher(EVIL, \"a\" * 5 ++ \"b\") == true" >> $out
+  echo -e " matcher(EVIL, \"b\") == true" >> $out
+  echo -e " matcher(EVIL, \"bb\") == false" >> $out
+  echo -e " matcher(\"abc\", \"abc\") == true" >> $out
+  echo -e " matcher((\"ab\" | \"a\") ~ (ONE | \"bc\"), \"abc\") == true" >> $out
+  echo -e " matcher(ONE, \"\") == true" >> $out
+  echo -e " matcher(ZERO, \"\") == false" >> $out
+  echo -e " matcher(ONE | CHAR('a'), \"\") == true" >> $out
+  echo -e " matcher(ONE | CHAR('a'), \"a\") == true" >> $out
+  
+  if (scala_assert "re.scala" "re_test4.scala")
+  then
+    echo -e "  --> success" >> $out
+  else
+    echo -e "  --> \n ONE TEST FAILED\n" >> $out  
+  fi
+fi
+
+
+if [ $tsts -eq 0 ]
+then
+  echo -e " val EVIL = SEQ(STAR(STAR(CHAR('a'))), CHAR('b'))" >> $out  
+  echo -e " size(der('a', der('a', EVIL))) == 28" >> $out
+  echo -e " size(der('a', der('a', der('a', EVIL)))) == 58" >> $out
+  echo -e " size(ders(\"aaaaaa\".toList, EVIL)) == 8" >> $out
+  
+  if (scala_assert "re.scala" "re_test5.scala")
+  then
+    echo -e "  --> success" >> $out
+  else
+    echo -e "  --> \n ONE TEST FAILED\n" >> $out   
+  fi
+fi
+
+