// -*- C++ -*- //

 #ifndef HUGO_ERROR_H

 #define HUGO_ERROR_H

 //! \file

 //! \brief Basic error handling (signaling) routines.

 #include <string>

 #include <sstream>

 namespace hugo {

   /**

    * \brief Generic exception class.

    *

    * \todo Do we need this?

    *

    * \todo Don't we need different kind of exceptions for different kind

    * of errors?

    * Shouldn't we use <stdexcept> instead?

    */

   class Exception : public std::exception {

   protected:

     std::ostringstream buf;

   public:

     Exception() {}

     explicit Exception(const std::string &s) { buf << s; }

     Exception(const Exception &e) { buf << e.buf.str(); }

     virtual ~Exception() throw() {}

     virtual const char* what() const throw() {

       return buf.str().c_str();

     }

     Exception& operator<<(std::string const& s) { buf << s; return *this; }

     Exception& operator<<(char const *s) { buf << s; return *this; }

     Exception& operator<<(int i) { buf << i; return *this; }

   };

   /**

    * \brief Generic error signaling function.

    *

    * \todo Do we really need this? Is it helpful?

    */

   inline void fault(const std::string &msg) {

     throw Exception(msg);

   }

   /**

    * \brief Macro for mark not yet implemented features.

    *

    * \todo Is this the right place for this? It should be used only in

    * modules under development.

    */

 # define FIXME(msg) \

     do { throw ::hugo::Exception("FIXME: " msg) << " (in: "    \

       << __FILE__ << ", " << __LINE__ << ")";                  \

     } while(false)

 }

 #endif // HUGO_ERROR_H