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diff --git a/sources/scalac/Unit.java b/sources/scalac/Unit.java
new file mode 100644
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+++ b/sources/scalac/Unit.java
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+/*     ____ ____  ____ ____  ______                                     *\
+**    / __// __ \/ __// __ \/ ____/    SOcos COmpiles Scala             **
+**  __\_ \/ /_/ / /__/ /_/ /\_ \       (c) 2002, LAMP/EPFL              **
+** /_____/\____/\___/\____/____/                                        **
+**                                                                      **
+** $Id$
+\*                                                                      */
+
+package scalac;
+
+import scalac.util.*;
+import scalac.symtab.NameMangler;
+import scalac.ast.parser.Sourcefile;
+import scalac.ast.Tree;
+import scala.compiler.typechecker.*;
+import java.io.*;
+import java.util.*;
+
+
+/** A representation for a compilation unit in scala
+ *
+ *  @author     Matthias Zenger
+ *  @version    1.0
+ */
+public class Unit {
+
+    /** the global compilation environment
+     */
+    public Global global;
+
+    /** the associated source code file
+     */
+    public Sourcefile source;
+
+    /** the content of the compilation unit in tree form
+     */
+    public Tree[] body;
+
+    /** the generated symbol data; Symbol -> byte[]
+    public SymData symdata;
+     */
+
+    /** the name mangler
+     */
+    public NameMangler mangler = new NameMangler();
+
+    /** number of errors issued for this compilation unit
+     */
+    public int errors;
+
+    /** number of warnings issued for this compilation unit
+     */
+    public int warnings;
+
+    /** number of notes issued for this compilation unit
+     */
+    public int notes;
+
+    public Unit(Global global, Sourcefile source) {
+        this.global = global;
+        this.source = source;
+    }
+    /*
+    public void print(String message) {
+        print(System.out, message);
+    }
+
+    public void print(PrintStream out, String message) {
+        out.println("[[begin " + message + "]]");
+        new Printer(out).printCompilationUnit(this);
+        out.println();
+        out.println("[[end " + message + "]]");
+    }
+    */
+    /** issue an error in this compilation unit
+     */
+    public void error(String message) {
+        error(Position.NOPOS, message);
+    }
+
+    /** issue an error in this compilation unit at a specific location
+     */
+    public void error(int pos, String message) {
+        boolean hidden = source.testAndSetLog(pos, message);
+        if (!hidden) errors++;
+        global.reporter.error(source.getMessage(pos, message), hidden);
+    }
+
+    /** issue a warning in this compilation unit
+     */
+    public void warning(String message) {
+        warning(Position.NOPOS, message);
+    }
+
+    /** issue a warning in this compilation unit at a specific location
+     */
+    public void warning(int pos, String message) {
+        if (global.reporter.nowarn) return;
+        message = "warning: " + message;
+        boolean hidden = source.testAndSetLog(pos, message);
+        if (!hidden) warnings++;
+        global.reporter.warning(source.getMessage(pos, message), hidden);
+    }
+
+    /** issue a note in this compilation unit
+     */
+    public void note(String message) {
+        note(Position.NOPOS, message);
+    }
+
+    /** issue a note in this compilation unit at a specific location
+     */
+    public void note(int pos, String message) {
+        global.reporter.note(source.getMessage(pos, message));
+        notes++;
+    }
+
+    /** return a string representation
+     */
+    public String toString() {
+        return source.toString();
+    }
+}