On Wednesday, 2003-07-23, 10:11, CEST, Krasimir Angelov wrote:
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By the way, are you still using functions with an arbitrary number of arguments? (I mean those declared with the ellipsis, like printf.) This would be a problem when creating Ada bindings. But meanwhile I'm not so interested in Ada bindings anymore, but rather am looking for a good Haskell GUI library ;-).
The functions with an arbitrary number of arguments are problem for both Haskell and Ada. I use only functions constant number of arguments and the arguments are always of scalar types (int, BOOL, char *, ...).
Ok, I probably mixed something up here. GTK+ uses functions with an arbitrary number of arguments but you didn't use them in HToolkit. The problem for creating Ada bindings is that there is no standard mapping of (void *) to an Ada type. But if you want to handle pointers to values of arbitrary type but not to functions, you can use (char *) instead of (void *) like malloc etc. do. Besides that this allows portable Ada bindings, it has the advantage that on some platforms the pointer may take less space. If you have, e.g, one code and one data segment, a function pointer and a char pointer each have to store only the offset address while a void pointer has to store also the kind of segment.
Krasimir
Wolfgang