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streamsupport is a backport of the Java 8 java.util.function (functional interfaces) and java.util.stream (streams) API for Java 6 / 7 and Android developers

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/*
 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * 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
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 * 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 java8.util.function;

import java8.util.function.BinaryOperator;
import java8.util.function.LongUnaryOperator;

/**
 * Represents an operation upon two {@code long}-valued operands and producing a
 * {@code long}-valued result.   This is the primitive type specialization of
 * {@link BinaryOperator} for {@code long}.
 *
 * This is a functional interface
 * whose functional method is {@link #applyAsLong(long, long)}.
 *
 * @see BinaryOperator
 * @see LongUnaryOperator
 * @since 1.8
 */
public interface LongBinaryOperator {

    /**
     * Applies this operator to the given operands.
     *
     * @param left the first operand
     * @param right the second operand
     * @return the operator result
     */
    long applyAsLong(long left, long right);
}