+ throw ModuleException("Letter is already in use for mode " + mh->name);
+
+ // The mode needs an id if it is either a user mode, a simple mode (flag) or a parameter mode.
+ // Otherwise (for listmodes and prefix modes) the id remains MODEID_MAX, which is invalid.
+ ModeHandler::Id modeid = MODEID_MAX;
+ if ((mh->GetModeType() == MODETYPE_USER) || (mh->IsParameterMode()) || (!mh->IsListMode()))
+ modeid = AllocateModeId(mh->GetModeType());