cas.hxx

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/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 *   Copyright 2020-Present Couchbase, 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.
 */
 
#pragma once
 
#include <cstdint>
 
namespace couchbase
{
class cas
{
public:
  cas() = default;
 
  explicit cas(std::uint64_t value)
    : value_{ value }
  {
  }
 
  auto operator==(const cas& other) const -> bool
  {
    return this->value_ == other.value_;
  }
 
  auto operator!=(const cas& other) const -> bool
  {
    return !(*this == other);
  }
 
  [[nodiscard]] auto empty() const -> bool
  {
    return value_ == 0;
  }
 
  [[nodiscard]] auto value() const -> std::uint64_t
  {
    return value_;
  }
 
private:
  std::uint64_t value_{ 0 };
};
} // namespace couchbase