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/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package jdk.nashorn.internal.objects.annotations;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* The Optimistic annotation is used for builtins that can throw UnwarrantedOptimism
* exception if they are wrong, whose callsite is optimistic and contains a program
* point. Every optimistic builtin callsite needs to bind its programPoint to an
* argument of the implementation at compile time
*
* Typical use case would be something like: if you want to do an optimistic "push" function
* in NativeArray that takes an int, write
*
* <pre>
* {@literal @}SpecializedFunction {@literal @}Optimistic
* public static int push(final Object self, final int x, final int programPoint) {
* try {
* //push code assuming that this is an int array
* //return new length of array, assuming it's an int
* } catch (ArrayWasWrong e) {
* //undo any array modifications
* throw new UnwarrantedOptimismExceptionArrayType(x, programPoint);
* } catch (LengthOverFlowed e) {
* //undo any array modifications
* throw new UnwarratnedOptimismExceptionArrayLength(uint32lenThatOverFlowed, programPoint)
* }
* }
* </pre>
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface Optimistic {
//empty
}
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