text: #pragma once
  //------------------------------------------------------------------------------
  //
  //   Copyright 2018-2020 Fetch.AI Limited
  //
  //   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.
  //
  //------------------------------------------------------------------------------
  
  #include "settings/detail/csv_string_helpers.hpp"
  #include "settings/setting_base.hpp"
  
  #include <iostream>
  #include <string>
  #include <vector>
  
  namespace fetch {
  namespace settings {
  
  class SettingCollection;
  
  class Help : public SettingBase
  {
  public:
    // Construction / Destruction
    explicit Help(SettingCollection &reg);
  
    Help(Help const &) = delete;
    Help(Help &&)      = delete;
    ~Help() override   = default;
  
    Help &operator=(Help const &) = delete;
    Help &operator=(Help &&) = delete;
  
    void FromStream(std::istream &stream) override;
    void ToStream(std::ostream &stream) const override;
  
    bool        TerminateNow() const override;
    std::string envname() const override;
  
  private:
    SettingCollection &reg_;
  };
  
  }  // namespace settings
  }  // namespace fetch
  