forgot the pretty-printer...

src/funcheck/purescala/PrettyPrinter.scala

+package funcheck.purescala
+
+import Trees._
+import Common._
+
+object PrettyPrinter {
+  def apply(tree: Expr): String = {
+    val retSB = pp(tree, new StringBuffer)
+    retSB.toString
+  }
+
+  import java.lang.StringBuffer
+
+  private def pp(tree: Expr, sb: StringBuffer): StringBuffer = tree match {
+    case And(exprs) => {
+      var nsb = sb
+      nsb.append("(")
+      val sz = exprs.size
+      var c = 0
+      exprs.foreach(ex => { nsb = pp(ex, nsb) ; c += 1 ; if(c < sz) nsb.append(" \u2227 ") })
+      nsb.append(")")
+      nsb
+    }
+
+    case Or(exprs) => {
+      var nsb = sb
+      nsb.append("(")
+      val sz = exprs.size
+      var c = 0
+      exprs.foreach(ex => { nsb = pp(ex, nsb) ; c += 1 ; if(c < sz) nsb.append(" \u2228 ") })
+      nsb.append(")")
+      nsb
+    }
+
+    case Not(expr) => {
+      sb.append("\u00AC(")
+      pp(expr, sb)
+      sb.append(")")
+    }
+
+    case IntLiteral(v) => sb.append(v)
+
+    case BooleanLiteral(v) => sb.append(v)
+
+    case _ => sb.append("?")
+  }
+
+}