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 * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * 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).
 *
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package jdk.internal.classfile.instruction;

import jdk.internal.classfile.CodeElement;
import jdk.internal.classfile.CodeModel;
import jdk.internal.classfile.Instruction;
import jdk.internal.classfile.Opcode;
import jdk.internal.classfile.impl.AbstractInstruction;

/**
 * Models a local variable increment instruction in the {@code code} array of a
 * {@code Code} attribute.  Corresponding opcodes will have a {@code kind} of
 * {@link Opcode.Kind#INCREMENT}.  Delivered as a {@link CodeElement} when
 * traversing the elements of a {@link CodeModel}.
 */
public sealed interface IncrementInstruction extends Instruction
        permits AbstractInstruction.BoundIncrementInstruction,
                AbstractInstruction.UnboundIncrementInstruction {
    /**
     * {@return the local variable slot to increment}
     */
    int slot();

    /**
     * {@return the value to increment by}
     */
    int constant();

    /**
     * {@return an increment instruction}
     *
     * @param slot the local variable slot to increment
     * @param constant the value to increment by
     */
    static IncrementInstruction of(int slot, int constant) {
        return new AbstractInstruction.UnboundIncrementInstruction(slot, constant);
    }
}
