Class CommandLineParser

tutorials/common/tutorial/application.h:12–70

  void waitForKeyPressedUnderWindows();
  
  struct CommandLineParser
  {
    enum Verbosity {
      NORMAL = 0,
      SILENT
    };
    
    CommandLineParser(Verbosity verbosity = NORMAL) : verbosity(verbosity) {}

    /* virtual interface for command line option processing */
    struct CommandLineOption : public RefCount 
    {
      CommandLineOption (const std::string& description) 
        : description(description) {}

      virtual void parse(Ref<ParseStream> cin, const FileName& path) = 0;
      
      std::string description;
    };

    /* helper class to provide parsing function via lambda function */
    template<typename F>
    struct CommandLineOptionClosure : public CommandLineOption
    {
      CommandLineOptionClosure (std::string description, const F& f) 
        : CommandLineOption(description), f(f) {}
      
      virtual void parse(Ref<ParseStream> cin, const FileName& path) {
        f(cin,path);
      }
      
      F f;
    };

    /* registers a command line option */
    template<typename F>
      void registerOption(const std::string& name, const F& f, const std::string& description) 
    {
      Ref<CommandLineOption> closure = new CommandLineOptionClosure<F>(description,f);
      commandLineOptionList.push_back(closure);
      commandLineOptionMap[name] = closure;
    }

    /* registers an alias for a command line option */
    void registerOptionAlias(const std::string& name, const std::string& alternativeName); 
    
    /* command line parsing */
    void parseCommandLine(int argc, char** argv);
    void parseCommandLine(Ref<ParseStream> cin, const FileName& path);

    /* prints help for all supported command line options */
    void printCommandLineHelp();

    /* command line options database */
    std::vector<         Ref<CommandLineOption> > commandLineOptionList;
    std::map<std::string,Ref<CommandLineOption> > commandLineOptionMap;
    
    Verbosity verbosity;