1 /*
   2  * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package java.lang.annotation;
  26 
  27 import java.lang.invoke.Constable;
  28 import java.lang.invoke.Constables;
  29 import java.lang.invoke.Intrinsics;
  30 
  31 /**
  32  * Identifies a {@link Constable}-yielding factory method or combinator
  33  * in {@link java.lang.invoke.Constables}.  For invocations of methods
  34  * annotated as {@linkplain TrackableConstant} whose arguments (and, for instance
  35  * methods, the receiver) are all constant expressions, the compiler will track
  36  * the result as a constant expression, for possible intrinsification.
  37  *
  38  * @see Constable
  39  * @see Constables
  40  * @see Intrinsics
  41  */
  42 @Retention(RetentionPolicy.CLASS)
  43 @Target({ ElementType.METHOD})
  44 public @interface TrackableConstant {}