/**
 * 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.
 **/

#ifndef QUICKSTEP_TYPES_OPERATIONS_COMPARISONS_NOT_EQUAL_COMPARISON_HPP_
#define QUICKSTEP_TYPES_OPERATIONS_COMPARISONS_NOT_EQUAL_COMPARISON_HPP_

#include "types/operations/comparisons/BasicComparison.hpp"
#include "types/operations/comparisons/ComparisonID.hpp"
#include "utility/Macros.hpp"

namespace quickstep {

class Type;
class TypedValue;
class UncheckedComparator;

/** \addtogroup Types
 *  @{
 */

/**
 * @brief The not-equal Comparison.
 **/
class NotEqualComparison : public BasicComparison {
 public:
  /**
   * @brief Get a reference to the singleton instance of this Operation.
   *
   * @return A reference to the singleton instance of this Operation.
   **/
  static const NotEqualComparison& Instance() {
    static NotEqualComparison instance;
    return instance;
  }

  bool compareTypedValuesChecked(const TypedValue &left,
                                 const Type &left_type,
                                 const TypedValue &right,
                                 const Type &right_type) const override;

  UncheckedComparator* makeUncheckedComparatorForTypes(const Type &left,
                                                       const Type &right) const override;

 private:
  NotEqualComparison() : BasicComparison(ComparisonID::kNotEqual) {
  }

  DISALLOW_COPY_AND_ASSIGN(NotEqualComparison);
};

/** @} */

}  // namespace quickstep

#endif  // QUICKSTEP_TYPES_OPERATIONS_COMPARISONS_NOT_EQUAL_COMPARISON_HPP_