.. _program_listing_file__tmp_ws_src_ecl_core_ecl_command_line_include_ecl_command_line_optional_unlabeled_tracker.hpp:

Program Listing for File optional_unlabeled_tracker.hpp
=======================================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_ecl_core_ecl_command_line_include_ecl_command_line_optional_unlabeled_tracker.hpp>` (``/tmp/ws/src/ecl_core/ecl_command_line/include/ecl/command_line/optional_unlabeled_tracker.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   
   /*****************************************************************************
   ** Ifdefs
   *****************************************************************************/
   
   #ifndef TCLAP_OPTIONAL_UNLABELED_TRACKER_H
   #define TCLAP_OPTIONAL_UNLABELED_TRACKER_H
   
   #include <string>
   
   namespace ecl {
   
   class OptionalUnlabeledTracker
   {
   
       public:
   
           static void check( bool req, const std::string& argName );
   
           static void gotOptional() { alreadyOptionalRef() = true; }
   
           static bool& alreadyOptional() { return alreadyOptionalRef(); }
   
       private:
   
           static bool& alreadyOptionalRef() { static bool ct = false; return ct; }
   };
   
   
   inline void OptionalUnlabeledTracker::check( bool req, const std::string& argName )
   {
       if ( OptionalUnlabeledTracker::alreadyOptional() )
           throw( SpecificationException(
       "You can't specify ANY Unlabeled Arg following an optional Unlabeled Arg",
                       argName ) );
   
       if ( !req )
           OptionalUnlabeledTracker::gotOptional();
   }
   
   } // namespace ecl
   
   
   #endif