1 /*
   2  * Copyright (c) 2010, 2013, 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 
  26 package jdk.nashorn.internal.ir;
  27 
  28 import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor;
  29 
  30 /**
  31  * Interface used by AccessNodes, IndexNodes and IdentNodes to signal that when evaluated, their value will be treated
  32  * as a function and immediately invoked, e.g. {@code foo()}, {@code foo.bar()} or {@code foo[bar]()}. Used to customize
  33  * the priority of composite dynamic operations when emitting {@code INVOKEDYNAMIC} instructions that implement them,
  34  * namely prioritize {@code getMethod} over {@code getElem} or {@code getProp}. An access or ident node with isFunction
  35  * set to true will be emitted as {@link NashornCallSiteDescriptor#GET_METHOD_PROPERTY} while one with it set to false will be emitted
  36  * as {@link NashornCallSiteDescriptor#GET_PROPERTY}. Similarly, an index node with isFunction set to true will be emitted as
  37  * {@link NashornCallSiteDescriptor#GET_METHOD_ELEMENT} while the one set to false will be emitted as {@link NashornCallSiteDescriptor#GET_ELEMENT}.
  38  */
  39 public interface FunctionCall {
  40     /**
  41      * Returns true if the value of this expression will be treated as a function and immediately invoked.
  42      * @return true if the value of this expression will be treated as a function and immediately invoked.
  43      */
  44     public boolean isFunction();
  45 }