001/*
002 * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.nodeinfo;
024
025import java.lang.annotation.*;
026
027/**
028 * Marker type for describing node inputs in snippets that are not of type {@link InputType#Value}.
029 */
030public abstract class StructuralInput {
031
032    private StructuralInput() {
033        throw new Error("Illegal instance of StructuralInput. This class should be used in snippets only.");
034    }
035
036    @Retention(RetentionPolicy.RUNTIME)
037    @Target(ElementType.TYPE)
038    @Inherited
039    public @interface MarkerType {
040        InputType value();
041    }
042
043    /**
044     * Marker type for {@link InputType#Memory} edges in snippets.
045     */
046    @MarkerType(InputType.Memory)
047    public abstract static class Memory extends StructuralInput {
048    }
049
050    /**
051     * Marker type for {@link InputType#Condition} edges in snippets.
052     */
053    @MarkerType(InputType.Condition)
054    public abstract static class Condition extends StructuralInput {
055    }
056
057    /**
058     * Marker type for {@link InputType#State} edges in snippets.
059     */
060    @MarkerType(InputType.State)
061    public abstract static class State extends StructuralInput {
062    }
063
064    /**
065     * Marker type for {@link InputType#Guard} edges in snippets.
066     */
067    @MarkerType(InputType.Guard)
068    public abstract static class Guard extends StructuralInput {
069    }
070
071    /**
072     * Marker type for {@link InputType#Anchor} edges in snippets.
073     */
074    @MarkerType(InputType.Anchor)
075    public abstract static class Anchor extends StructuralInput {
076    }
077
078    /**
079     * Marker type for {@link InputType#Association} edges in snippets.
080     */
081    @MarkerType(InputType.Association)
082    public abstract static class Association extends StructuralInput {
083    }
084
085    /**
086     * Marker type for {@link InputType#Extension} edges in snippets.
087     */
088    @MarkerType(InputType.Extension)
089    public abstract static class Extension extends StructuralInput {
090    }
091}