content: /*
   * 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 org.apache.calcite.linq4j.function;
  
  /**
   * Function with two parameters returning a native {@code boolean} value.
   *
   * @param <T0> Type of argument #0
   * @param <T1> Type of argument #1
   */
  public interface Predicate2<T0, T1> extends Function<Boolean> {
    /**
     * Predicate that always evaluates to {@code true}.
     *
     * @see org.apache.calcite.linq4j.function.Functions#truePredicate1()
     */
    Predicate2<Object, Object> TRUE = (v0, v1) -> true;
  
    /**
     * Predicate that always evaluates to {@code false}.
     *
     * @see org.apache.calcite.linq4j.function.Functions#falsePredicate1()
     */
    Predicate2<Object, Object> FALSE = (v0, v1) -> false;
  
    boolean apply(T0 v0, T1 v1);
  }
  