+/** This class can be used on its own to represent an exception, or derived to represent a module-specific exception.
+ * When a module whishes to abort, e.g. within a constructor, it should throw an exception using ModuleException or
+ * a class derived from ModuleException. If a module throws an exception during its constructor, the module will not
+ * be loaded. If this happens, the error message returned by ModuleException::GetReason will be displayed to the user
+ * attempting to load the module, or dumped to the console if the ircd is currently loading for the first time.
+ */
+class ModuleException
+{
+ private:
+ /** Holds the error message to be displayed
+ */
+ std::string err;
+ public:
+ /** Default constructor, just uses the error mesage 'Module threw an exception'.
+ */
+ ModuleException() : err("Module threw an exception") {}
+ /** This constructor can be used to specify an error message before throwing.
+ */
+ ModuleException(std::string message) : err(message) {}
+ /** This destructor solves world hunger, cancels the world debt, and causes the world to end.
+ * Actually no, it does nothing. Never mind.
+ */
+ virtual ~ModuleException() {};
+ /** Returns the reason for the exception.
+ * The module should probably put something informative here as the user will see this upon failure.
+ */
+ virtual char *GetReason()
+ {
+ return (char*)err.c_str();
+ }
+};