[MIT-Scheme-devel] [PATCH] FFI: Fixing problem with groveller for structures with typedefs.

[Matt Birkholz]

> From: Peter Feigl <address@hidden>
> Date: Wed, 12 Dec 2012 14:05:51 +0100
> 
> [...] This patch removes the "struct" from the declaration of the
> struct in grovel_struct_<name> and from the sizeof(<name>) in the
> -const.c file generated by the FFI.

I can't imagine just chopping "struct" off a type declaration (moving
it from one namespace to another!) can be the solution.  Can we start
with an example?

I tried generating a shim for the API you gave and had no problem.

    (typedef a (struct (x int)))

    (extern (* a) test_func (arg (* a)))

There IS a problem with

    (extern a test_func (arg a))

signaled by a warning "Unexpected return type: (struct (x . int))".
(It could call that an "unsupported return type", and warn about the
type of ARG too.)