code: /**
   * Copyright (c) 2005, Regents of the University of California
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * Redistributions of source code must retain the above copyright notice,
   * this list of conditions and the following disclaimer.
   *
   * Redistributions in binary form must reproduce the above copyright
   * notice, this list of conditions and the following disclaimer in the
   * documentation and/or other materials provided with the distribution.
   *
   * Neither the name of the University of California, Los Angeles nor the
   * names of its contributors may be used to endorse or promote products
   * derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * Creation date: Oct 5, 2005
   */
  
  package jintgen.types;
  
  import cck.parser.*;
  
  /**
   * The <code>TypeErrorReporter</code> class implements an <code>ErrorReporter</code> subclass
   * that has methods to report typing errors that occur in type checking a program. For example,
   * when a type mismatch occurs, the typechecker can call <code>.TypeMismatch()</code> with the
   * type of syntactic construct in question <code>Typeable</code> instance, and the type expected.
   *
   * An instance of this error reporter is needed with each <code>TypeEnv</code> instance so that
   * an unresolved <code>TypeRef</code> can be reported to the user.
   *
   * @author Ben L. Titzer
   */
  public class TypeErrorReporter extends ErrorReporter {
  
      public void UnresolvedType(AbstractToken t) {
          unresolved("Type", "type", t);
      }
  
      public void TypeMismatch(String what, Typeable expr, Type expect) {
          String report = "Type mismatch in " + what + ": expected " + expect + ", found " + expr.getType();
          error("TypeMismatch", expr.getSourcePoint(), report);
      }
  
      public void TypesCannotBeCompared(Typeable t1, Typeable t2) {
          String report = "Types cannot be compared: " + t1.getType() + " and " + t2.getType();
          SourcePoint sp = new SourcePoint(t1.getSourcePoint(), t2.getSourcePoint());
          error("TypesCannotBeCompared", sp, report);
      }
  
      public void ExpectedTypeClass(Typeable t, String tc) {
          String report = "Expect "+tc+" type, found: "+t.getType();
          error("ExpectedTypeClass", t.getSourcePoint(), report, tc);
  
      }
  }
  