883     if (argvars[0].v_type != VAR_STRING || argvars[1].v_type != VAR_NUMBER  in f_charidx()
884 	    || (argvars[2].v_type != VAR_UNKNOWN  in f_charidx()
885 					   && argvars[2].v_type != VAR_NUMBER  in f_charidx()
886 					   && argvars[2].v_type != VAR_BOOL))  in f_charidx()
897     if (argvars[2].v_type != VAR_UNKNOWN)  in f_charidx()
937     if (argvars[1].v_type != VAR_UNKNOWN)  in f_str2list()
981 		|| (argvars[1].v_type != VAR_UNKNOWN  in f_str2nr()
985     if (argvars[1].v_type != VAR_UNKNOWN)  in f_str2nr()
993 	if (argvars[2].v_type != VAR_UNKNOWN && tv_get_bool(&argvars[2]))  in f_str2nr()
1080     if (argvars[2].v_type != VAR_UNKNOWN)  in f_stridx()
1105     rettv->v_type = VAR_STRING;  in f_string()
1169     if (argvars[1].v_type != VAR_UNKNOWN)  in f_strchars()
1194     if (argvars[1].v_type != VAR_UNKNOWN)  in f_strdisplaywidth()
1234 		|| (argvars[2].v_type != VAR_UNKNOWN  in f_strcharpart()
1244 	if (argvars[2].v_type != VAR_UNKNOWN  in f_strcharpart()
1245 					   && argvars[3].v_type != VAR_UNKNOWN)  in f_strcharpart()
1266 	if (argvars[2].v_type != VAR_UNKNOWN)  in f_strcharpart()
1303     rettv->v_type = VAR_STRING;  in f_strcharpart()
1323 		|| (argvars[2].v_type != VAR_UNKNOWN  in f_strpart()
1333     else if (argvars[2].v_type != VAR_UNKNOWN)  in f_strpart()
1352     if (argvars[2].v_type != VAR_UNKNOWN && argvars[3].v_type != VAR_UNKNOWN)  in f_strpart()
1362     rettv->v_type = VAR_STRING;  in f_strpart()
1393     if (argvars[2].v_type != VAR_UNKNOWN)  in f_strridx()
1434     rettv->v_type = VAR_STRING;  in f_strtrans()
1447     rettv->v_type = VAR_STRING;  in f_tolower()
1460     rettv->v_type = VAR_STRING;  in f_toupper()
1496     rettv->v_type = VAR_STRING;  in f_tr()
1599     rettv->v_type = VAR_STRING;  in f_trim()
1605 		|| (argvars[1].v_type != VAR_UNKNOWN  in f_trim()
1613     if (argvars[1].v_type != VAR_UNKNOWN && argvars[1].v_type != VAR_STRING)  in f_trim()
1619     if (argvars[1].v_type == VAR_STRING)  in f_trim()
1623 	if (argvars[2].v_type != VAR_UNKNOWN)  in f_trim()
1704     if (tvs[idx].v_type == VAR_UNKNOWN)  in tv_nr()
1731     if (tvs[idx].v_type == VAR_UNKNOWN)  in tv_str()
1754     if (tvs[idx].v_type == VAR_UNKNOWN)  in tv_float()
1759 	if (tvs[idx].v_type == VAR_FLOAT)  in tv_float()
1761 	else if (tvs[idx].v_type == VAR_NUMBER)  in tv_float()
2794     if (tvs != NULL && tvs[arg_idx - 1].v_type != VAR_UNKNOWN)  in vim_vsnprintf_typval()