pointers to undefined structs

[mlubin]

The pattern below is relatively common in header files:

typedef struct mysecretstruct SECRET;

void foo(SECRET*);

without any definition of mysecretstruct.

Right now, wrap_c will output

WARNING: Skipping empty struct: "mysecretstruct"

and produce:

function foo(::Ptr{SECRET})
  ccall( (:foo, test), None, (Ptr{SECRET},), )
end

which doesn't quite work because SECRET isn't defined anywhere in Julia. It seems like the right thing to do is produce Ptr{Void} here instead?

[ihnorton]

Fixed by making a proper typealias, although the mysecretstruct must actually exist somewhere.

[mlubin]

What do you mean by somewhere? It's perfectly valid C to not define mysecretstruct anywhere in the public headers.

[ihnorton]

You are right, mysecretstruct should never show up on the Julia side. I changed it to check the validity of a type reference and emit Void as a fallback. I tested with your snippet above, but let me know if it doesn't work properly with the full header.