* \brief Message variabel will contain messages which must be displayed.
*/
externstd::stringstreammessage;
/*!
* \brief Putting ende in message variable will triggered message display with the error flag.
*/
externEnderrorende;
/*!
* \brief Putting endw in message variable will triggered message display with the warning flag.
*/
externEndwarningendw;
/*!
* \brief Putting endi in message variable will triggered message display with the information flag.
*/
externEndinformationendi;
/* the operator function declaration */
/*******************************
The operator function declaration
********************************/
/*!
* \brief The macro OP_FUNC_DECL defines operator << for message displaying system.
*
* It will create as operator << functions as different kind of message classes. Operator takes a string stream (it can be strings with numbers and booleans) than trigger the display of this stream according to the second argument which decides what kind of message it is (for example : an error message or a warning message).