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TypeI.java
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TypeI.java
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/*
*
* ***** 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):
* Ben Lickly
* Dimitris Vardoulakis
*
* 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;
/**
* A common interface for types in the old type system and the new type system,
* so that the other passes need not know which type system they are using.
*
* @author blickly@google.com (Ben Lickly)
* @author dimvar@google.com (Dimitris Vardoulakis)
*/
public interface TypeI {
boolean isBottom();
boolean isTop();
boolean isTypeVariable();
boolean isUnresolved();
// Hacky method to abstract away corner case handling of the way OTI
// represents unresolved types.
boolean isUnresolvedOrResolvedUnknown();
boolean isConstructor();
boolean isEquivalentTo(TypeI type);
boolean isFunctionType();
boolean isInterface();
boolean isSubtypeOf(TypeI type);
boolean containsArray();
boolean isUnknownType();
boolean isUnionType();
boolean isNullable();
boolean isVoidable();
boolean isPrototypeObject();
boolean isInstanceofObject();
ObjectTypeI autoboxAndGetObject();
JSDocInfo getJSDocInfo();
/**
* If this is a union type, returns a union type that does not include
* the null or undefined type.
*/
TypeI restrictByNotNullOrUndefined();
/**
* Downcasts this to a FunctionTypeI, or returns null if this is not
* a function.
*/
FunctionTypeI toMaybeFunctionType();
/**
* If this type is a single object, downcast it to ObjectTypeI.
* If it is a non-object or a union of objects, return null.
*/
ObjectTypeI toMaybeObjectType();
/**
* If this type is a union type, returns a list of its members. Otherwise
* returns null.
*/
Iterable<? extends TypeI> getUnionMembers();
String getDisplayName();
}