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Open-source constraint solver.

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/*
 * This file is part of choco-solver, http://choco-solver.org/
 *
 * Copyright (c) 2024, IMT Atlantique. All rights reserved.
 *
 * Licensed under the BSD 4-clause license.
 *
 * See LICENSE file in the project root for full license information.
 */
package org.chocosolver.util;

/**
 * 

 *
 * @author Charles Prud'homme
 * @since 01/06/12
 */
public interface Indexable {

    /**
     * Return the index of this in variable
     *
     * @param key the key element, must be a known this
     * @return index index of this in variable list of event recorder
     */
    int getIdx(K key);

    /**
     * Return the index of this in variable
     *
     * @param key a key element, must be a known this
     * @param idx index of this in variable list of event recorder
     */
    void setIdx(K key, int idx);
}