[Gretl-users] 'opt' parameter in gretl_VAR ()

Hello, I am trying to learn libgretl and have one question: in gretl_VAR(), the description of the 4th parameter (opt) says "if includes OPT_R, ..", suggesting that one can combine several flags. Also the source code seems to expect this, having checks of type "opt & flag". However, the parameter is of type gretlopt, which is an enum - so that I have to use exactly one number from the list (at least in C++, not sure about C). Shouldn't the parameter be int, so that one could add several values from gretlopt - or did I misunderstood something, as usual? Thanks. Michal