= Exceptions =
[[TracNav(TracNav/TOC_Development)]]

This article assumes that you know what an Exception is and how to throw it. Otherwise, see [http://en.wikipedia.org/wiki/Exception_handling wikipedia] or [http://www.cplusplus.com/doc/tutorial/exceptions.html cpluscplus.com]. [[br]][[br]]

When an exception gets thrown, its message, containing file, line number, function name, exception type and programmer message, is displayed via {{{orxout(internal_error)}}}. That means the user usually doesn't see them anywhere because it is better left up to the programmer to display the message at the right position. But you can still open the log and search for it unless the output level is below {{{internal_error}}}. [[br]][[br]]

To throw an exception you best use the 'ThrowException(type, message)' macro that automatically adds line number, function and file name. 'Type' is a user defined derived class of orxonox::Exception so that different exceptions can be caught with different 'catch' clauses. [[br]]
Currently available types are: [[br]]
|| Name || Description ||
|| || ||
|| General || Anything. Avoid using it and rather define a new one. ||
|| FileNotFound || Obviously a file was not found ||
|| Argument || A function argument in a parser was wrong. ||
|| PluginsNotFound || No Ogre plugins were found but are required ||
|| InitialisationFailed || When starting the game engine, something went terribly wrong. ||
|| NotImplemented || The feature requested has not yet been implemented ||
|| GameState || Something went wrong with a GameState class ||
[[br]]