diff -r f5214da1976e -r 8067d0a8ba04 progs/compile_arrays.scala
--- a/progs/compile_arrays.scala	Sun Jul 28 21:10:39 2019 +0100
+++ b/progs/compile_arrays.scala	Tue Jul 30 20:19:40 2019 +0100
@@ -69,9 +69,9 @@
 .end method
 """
 
+
 // Compiler functions
 
-
 // for generating new labels
 var counter = -1
 
@@ -186,33 +186,21 @@
   (beginning ++ instructions.mkString ++ ending).replaceAllLiterally("XXX", class_name)
 }
 
-// compiling and running files
-//
-// JVM files can be assembled with 
-//
-//    java -jar jvm/jasmin-2.4/jasmin.jar fib.j
-//
-// and started with
-//
-//    java fib/fib
 
-
-
+// main compiler functions
 import scala.util._
 import scala.sys.process._
 import scala.io
 
 def compile_tofile(bl: Block, class_name: String) = {
   val output = compile(bl, class_name)
-  val fw = new java.io.FileWriter(class_name + ".j") 
-  fw.write(output) 
-  fw.close()
+  scala.tools.nsc.io.File(s"${class_name}.j").writeAll(output)
 }
 
 def compile_all(bl: Block, class_name: String) : Unit = {
   compile_tofile(bl, class_name)
   println("compiled ")
-  val test = ("java -jar jvm/jasmin-2.4/jasmin.jar " + class_name + ".j").!!
+  (s"java -jar jvm/jasmin-2.4/jasmin.jar ${class_name}.j").!!
   println("assembled ")
 }
 
@@ -227,91 +215,20 @@
 def compile_run(bl: Block, class_name: String) : Unit = {
   println("Start compilation")
   compile_all(bl, class_name)
-  println("running")
-  println("Time: " + time_needed(1, ("java " + class_name + "/" + class_name).!))
-}
-
-
-// BF Part
-
-// simple instructions
-def instr(c: Char) : String = c match {
-  case '>' => "ptr := ptr + 1;"
-  case '<' => "ptr := ptr - 1;"
-  case '+' => "field[ptr] := field[ptr] + 1;"
-  case '-' => "field[ptr] := field[ptr] - 1;"
-  case '.' => "x := field[ptr]; write x;"
-  case '['  => "while (field[ptr] != 0) do {"
-  case ']'  => "skip};"
-  case _ => ""
-}
-
-def instrs(prog: String) : String =
-  prog.toList.map(instr).mkString
-
-
-// compound instructions
-def splice(cs: List[Char], acc: List[(Char, Int)]) : List[(Char, Int)] = (cs, acc) match {
-  case (Nil, acc) => acc
-  case (c :: cs, Nil) => splice(cs, List((c, 1)))
-  case (c :: cs, (d, n) :: acc) => 
-    if (c == d) splice(cs, (c, n + 1) :: acc)
-    else splice(cs, (c, 1) :: (d, n) :: acc)
+  println("Start running")
+  println("Time: " + time_needed(1, (s"java ${class_name}/${class_name}").!))
 }
 
-def spl(s: String) = splice(s.toList, Nil).reverse
-
-def instr2(c: Char, n: Int) : String = c match {
-  case '>' => s"ptr := ptr + $n;"
-  case '<' => s"ptr := ptr - $n;"
-  case '+' => s"field[ptr] := field[ptr] + $n;"
-  case '-' => s"field[ptr] := field[ptr] - $n;"
-  case '.' => s"x := field[ptr]; write x;" 
-  case '['  => s"while (field[ptr] != 0) do {" * n 
-  case ']'  => s"skip};" * n
-  case _ => ""
-}
-
-def instrs2(prog: String) : String =
-  spl(prog).map{ case (c, n) => instr2(c, n) }.mkString
-
-
-def bf_str(prog: String) : String = {
-  "\n" ++
-  //"new field[30000];\n" ++
-  "ptr := 15000;" ++
-  instrs2(prog) ++
-  "skip"
-}
+// a simple test case
+val arr_test = 
+  List(Array("a", 10),                 // a[10]
+       Array("b", 2),                  // b[2]
+       AssignA("a", Num(0), Num(10)),  // a[0] := 10
+       Assign("x", Ref("a", Num(0))),  // x := a[0]
+       Write("x"),                     // write x
+       AssignA("b", Num(1), Num(5)),   // b[1] := 5
+       Assign("x", Ref("b", Num(1))),  // x := b[1]
+       Write("x"))                     // write x
 
-def bf_run(bfprog: String, name: String) = {
-  println("BF processing start")
-  val bf_string = bf_str(bfprog).replaceAll("\\s", "")
-  println(s"BF parsing start (string length ${bf_string.length})")
-  val bf_prog = Stmts.parse_all(bf_string).toList.head
-  println("BF Compile start")
-  compile_run(Array("field", 30000) :: bf_prog, name)
-}
-
-
-
-val bf1 = """++++++++[>+>++++<<-]>++>>+<[-[>>+<<-]+>>]>+[-<<<[
-      ->[+[-]+>++>>>-<<]<[<]>>++++++[<<+++++>>-]+<<++.[-]<<
-      ]>.>+[>>]>+]"""
+compile_run(arr_test, "a")
 
-bf_run(bf1, "sier")
-
-bf_run("""++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++
-       ..+++.>>.<-.<.+++.------.--------.>>+.>++.""", "hello")
-
-bf_run("""+++++++++++
-      >+>>>>++++++++++++++++++++++++++++++++++++++++++++
-      >++++++++++++++++++++++++++++++++<<<<<<[>[>>>>>>+>
-      +<<<<<<<-]>>>>>>>[<<<<<<<+>>>>>>>-]<[>++++++++++[-
-      <-[>>+>+<<<-]>>>[<<<+>>>-]+<[>[-]<[-]]>[<<[>>>+<<<
-      -]>>[-]]<<]>>>[>>+>+<<<-]>>>[<<<+>>>-]+<[>[-]<[-]]
-      >[<<+>>[-]]<<<<<<<]>>>>>[+++++++++++++++++++++++++
-      +++++++++++++++++++++++.[-]]++++++++++<[->-<]>++++
-      ++++++++++++++++++++++++++++++++++++++++++++.[-]<<
-      <<<<<<<<<<[>>>+>+<<<<-]>>>>[<<<<+>>>>-]<-[>>.>.<<<
-      [-]]<<[>>+>+<<<-]>>>[<<<+>>>-]<<[<+>-]>[<+>-]<<<-]""", "fibs")