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: Nov 3, 2005
   */
  
  package jintgen.isdl;
  
  import cck.util.Util;
  import jintgen.isdl.parser.Token;
  import jintgen.jigir.JIGIRTypeEnv;
  import jintgen.types.*;
  
  /**
   * @author Ben L. Titzer
   */
  public class EnumTypeRef extends TypeRef {
  
      EnumDecl decl;
  
      public EnumTypeRef(Token t) {
          super(t);
      }
  
      public EnumTypeRef(Type t) {
          super(t);
          TypeCon tc = t.getTypeCon();
          if ( tc instanceof JIGIRTypeEnv.TYPE_enum ) {
              decl = ((JIGIRTypeEnv.TYPE_enum)tc).decl;
          } else {
              throw Util.failure("Cannot create enum type reference to type "+t);
          }
      }
  
      public Type resolve(TypeEnv te) {
          Type t = super.resolve(te);
          TypeCon tc = t.getTypeCon();
          if ( tc instanceof JIGIRTypeEnv.TYPE_enum ) {
              decl = ((JIGIRTypeEnv.TYPE_enum)tc).decl;
              return t;
          }
          // default case: not the right type class
          te.ERROR.ExpectedTypeClass(this, "enum");
          return t;
      }
  
      public EnumDecl getEnumDecl() {
          if ( decl == null ) throw Util.failure("Enum type reference not resolved at "+tcName.getSourcePoint());
          return decl;
      }
  }
  