optional_unlabeled_tracker.hpp

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/*****************************************************************************
** 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