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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
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 * 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 java.util.function;

/**
 * An operation on a {@code double} operand yielding a {@code double}
 * result. This is the primitive type specialization of {@link UnaryOperator}
 * for {@code double}.
 *
 * @see UnaryOperator
 * @since 1.8
 */
@FunctionalInterface
public interface DoubleUnaryOperator {

    /**
     * Returns the {@code double} result of the operation upon the
     * {@code double} operand.
     *
     * @param operand the operand value
     * @return the operation result value
     */
    public double applyAsDouble(double operand);
}