+ // 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());
+
+ if (!modehandlersbyname[mh->GetModeType()].insert(std::make_pair(mh->name, mh)).second)
+ throw ModuleException("Mode name already in use: " + mh->name);