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• RelationshipVisitor.java

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com.google.javascript.rhino.jstype.RelationshipVisitor Maven / Gradle / Ivy

/*
 *
 * ***** 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):
 *   John Lenz
 *   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 relationship visitor.

 *
 * This code will calculate a specific value of type {@code T} from
 * two types based on its structure.
 *
 * @author [email protected] (John Lenz)
 */
interface RelationshipVisitor {

  /**
   * Unknown type's case.
   */
  T caseUnknownType(JSType thisType, JSType thatType);

  /**
   * Bottom type's case.
   */
  T caseNoType(JSType thatType);

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

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

  /**
   * Value type's case.
   */
  T caseValueType(ValueType thisType, JSType thatType);

  /**
   * Object type's case.
   */
  T caseObjectType(ObjectType thisType, JSType thatType);

  /**
   * Function type's case.
   */
  T caseFunctionType(FunctionType thisType, JSType thatType);

  /**
   * Union type's case.
   */
  T caseUnionType(UnionType thisType, JSType thatType);

  /**
   * Templatized type's case.
   */
  T caseTemplatizedType(TemplatizedType thisType, JSType thatType);

  /**
   * Template type's case.
   */
  T caseTemplateType(TemplateType thisType, JSType thatType);

  /**
   * Enum element type's case.
   */
  T caseEnumElementType(EnumElementType typeType, JSType thatType);

}