Re: [Libguestfs] [nbdkit PATCH 2/2] ocaml: Implement .list_exports and friends

I guess my remaining questions are whether there is a better approach than: func : export list = [ { "name1"; None }; { "name2"; Some "desc" } ] In python, I was able to use: return [ "name1", ( "name2", "desc" ) ] where the alternation was on a string vs. a 2-tuple of strings, rather than all list members being a record but where the record had an optional member. But I'm not sure how to represent that in the ocaml interface. Maybe I'm thinking of something like: type export = | Name of string | NameDesc of string * string but I'm not quite sure how to write a list that initializes that. On the other hand, I think I understand the C binding for such a type: either val is Val_int(0) (C 1) for the Name branch (Field(v, 0) is a string), or val is Val_int(1) (C 2) for the NameDesc branch (Field(v, 0) is name, Field(v, 1) is desc).