text: /*****************************************************************************
   *
   * This file is part of Mapnik (c++ mapping toolkit)
   *
   * Copyright (C) 2015 Artem Pavlenko
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   *
   *****************************************************************************/
  
  #ifndef MAPNIK_IMAGE_OPTIONS_HPP
  #define MAPNIK_IMAGE_OPTIONS_HPP
  
  #include <map>
  #include <string>
  
  #pragma GCC diagnostic push
  #include <mapnik/warning_ignore.hpp>
  #include <boost/optional.hpp>
  #pragma GCC diagnostic pop
  
  
  namespace mapnik {
  
  using image_options_map = std::map<std::string, boost::optional<std::string> >;
  inline std::string to_string(boost::optional<std::string> const& val) { return val ? *val : "<unitialised>";}
  image_options_map parse_image_options(std::string const& options);
  
  }
  
  #endif // MAPNIK_IMAGE_OPTIONS_HPP
  