[fetter-devel] Global variables, macros and structs.

[Brad Beveridge]

Hi all, I have a few questions about VZN.  I have used VZN to generate
bindings for ncurses.
I've started using the bindings and noticed a couple of things.

1) Global variables are not exported.  Is there a reason for this, or
just something that is on the to-do list?

2) Macros don't get auto generated.  This sounds like a hard problem
though, since C macros can be pretty weird at times.

3) If a header defines a struct the name of the struct is exported
from the package, but the struct members are not.  Eg, given a package
FOO, with a struct BAR having a member BAZ, you need to access it as
(cffi:with-foreign-slots ((FOO::BAZ) ptr BAR) ... )
For ease of use should the members also be exported?

Back to #2, since C macros are probably hard to auto-generate, but
trivial to hand code, does VZN support a mechanism for injecting
custom code to the binding.
What I mean is, I'd like 1 file (library.binding) that contains the
info on how to generate the binding plus some code that I have hand
done that should also end up (verbatim) in the generated file.  That
way I can write some helper code, and when the C header changes I can
just re-generate from one file.

Thoughts?

Cheers
Brad