/*
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Rhino code, released
 * May 6, 1999.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1997-1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Bob Jervis
 *   Google Inc.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License Version 2 or later (the "GPL"), in which
 * case the provisions of the GPL are applicable instead of those above. If
 * you wish to allow use of your version of this file only under the terms of
 * the GPL and not to allow others to use your version of this file under the
 * MPL, indicate your decision by deleting the provisions above and replacing
 * them with the notice and other provisions required by the GPL. If you do
 * not delete the provisions above, a recipient may use your version of this
 * file under either the MPL or the GPL.
 *
 * ***** END LICENSE BLOCK ***** */

package com.google.javascript.rhino.jstype;





/**
 * A type visitor.<p>
 *
 * This code will calculate a specific value of type {@code T} from a type
 * based on its structure:
 *
 * <pre>JSType type = &hellip;;
 * T value = type.visit(new Visitor&lt;T&gt;() {
 * &nbsp;&nbsp;&hellip;
 * });</pre>
 *
 */
public interface Visitor<T> {
  /**
   * Bottom type's case.
   */
  T caseNoType();

  /**
   * Enum element type's case.
   */
  T caseEnumElementType(EnumElementType type);

  /**
   * All type's case.
   */
  T caseAllType();

  /**
   * Boolean value type's case.
   */
  T caseBooleanType();

  /**
   * Bottom Object type's case.
   */
  T caseNoObjectType();

  /**
   * Function type's case.
   */
  T caseFunctionType(FunctionType type);

  /**
   * Object type's case.
   */
  T caseObjectType(ObjectType type);

  /**
   * Unknown type's case.
   */
  T caseUnknownType();

  /**
   * Null type's case.
   */
  T caseNullType();

  /**
   * Number value type's case.
   */
  T caseNumberType();

  /**
   * String value type's case.
   */
  T caseStringType();

  /**
   * Void type's case.
   */
  T caseVoidType();

  /**
   * Union type's case.
   */
  T caseUnionType(UnionType type);

  /**
   * Templatized type's case.
   */
  T caseTemplatizedType(TemplatizedType type);

  /**
   * Template type's case.
   */
  T caseTemplateType(TemplateType templateType);
}
