Can we support passing structs with array members?

[yallop]

Currently ctypes.foreign doesn't support passing or returning structs with array members, since there's no direct support for adding array members to structs in libffi.

If it's safe to assume that a struct with a member of type T[n] is passed in the same way as a struct with n members of type T, then we can add support by doing the equivalent of this: https://gist.github.com/TooTallNate/3797011.

[aziem]

Is there a work-around for this issue at the moment? I googled around and couldn't find an answer.
I have a struct with an array member as below for which I am trying to create an equivalent OCaml type:

struct {...void *data[2]...}

Using the following fails:

let _ = field blah "data" (array 2 (ptr void))

I am using the stub generation to generate my bindings and the build fails saying that libffi does not support passing arrays. Is there a solution/work around? The build works if I do:

let _ = field blah "data" (ptr void)

but I don't think this is the correct way to handle this?

[yallop]

Yes, stub generation supports structs with array members. There's a definition of such a struct in the testsuite:

  type triple
  let triple : triple structure typ = structure "triple"
  let elements = field triple "elements" (array 3 double)
  let () = seal triple

with a corresponding test that calls a C function.

[aziem]

Sorry for the noise: I had made a silly mistake in my stub generation code and it's working now.

Thanks!