/*
 * Copyright 2019-present Facebook, Inc.
 *
 * Licensed 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 com.facebook.buck.util.function;

/**
 * Represents a function that accepts four arguments and produces a result. This is the four-arity
 * specialization of {@link java.util.function.Function}.
 *
 * <p>This is a functional interface whose functional method is {@link #apply(Object, Object, Object
 * )}.
 *
 * @param <T> the type of the first argument to the function
 * @param <U> the type of the second argument to the function
 * @param <V> the type of the third argument to the function
 * @param <R> the type of the result of the function
 * @see java.util.function.Function
 */
@FunctionalInterface
public interface TriFunction<T, U, V, R> {
  /**
   * Applies this function to the given arguments.
   *
   * @param t the first function argument
   * @param u the second function argument
   * @param v the third function argument
   * @return the function result
   */
  R apply(T t, U u, V v);
}

Add new TriFunction interface