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/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package java.util.function;

@FunctionalInterface
public interface DoubleUnaryOperator {
	double applyAsDouble(double operand);

	default DoubleUnaryOperator compose(DoubleUnaryOperator before) {
		return (double v) -> applyAsDouble(before.applyAsDouble(v));
	}

	default DoubleUnaryOperator andThen(DoubleUnaryOperator after) {
		return (double t) -> after.applyAsDouble(applyAsDouble(t));
	}

	static DoubleUnaryOperator identity() {
		return t -> t;
	}
}