// Copyright 2020 Google LLC
//
// 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.google.api.generator.util;

import java.util.Objects;
import java.util.function.Function;

@FunctionalInterface
public interface TriFunction<A, B, C, R> {
  R apply(A a, B b, C c);

  default <V> TriFunction<A, B, C, V> andThen(Function<? super R, ? extends V> after) {
    Objects.requireNonNull(after);
    return (A a, B b, C c) -> after.apply(apply(a, b, c));
  }
}

add a TriFunction (#624)