include <string>;

class options
{
  bool --help {"Print usage information and exit."};

  std::string --greeting = "Hello"
  {
    "<text>",
    "Use <text> as a greeting phrase instead of the default \"Hello\"."
  };

  unsigned int --exclamations = 1
  {
    "<num>",
    "Print <num> exclamation marks instead of 1 by default."
  };
};