On Sun, Aug 28, 2011 at 4:41 AM, Luís Oliveira <luis...@gmail.com> wrote:
> What kind of macro are you thinking of? In the COMPLEX case, do you > want to abstract away the need to allocate (and free) the structure > object explicitly? > I've written a macro define-structure-conversion to flesh out what I see as the way to go. Eventually, I think this would be best as a couple of key arguments in the defcstruct, similar to FSBV's current :constructor and :deconstructor arguments. I am stuck however on recursive conversion of slots. What I have works for the complex example, but if I built on that with a "real-and-complex" structure and try to convert to foreign, I get an error because the complex slot is already converted by the time it gets in the setf. Even with an existing pointer, as would be obtained from foreign-slot-pointer, the only function I have at my disposal for translating the slot is translate-to-foreign which creates a new foreign struct, it does not write to an existing struct. It seems I need something like a setf function. See the define-structure-conversion definition and test case examples<https://github.com/cffi/cffi/blob/4d475077a6c00dd12aa0fc72f8b36b8cb5b8c3d3/src/structures.lisp>. Any thoughts on how to proceed? Liam > > -- > Luís Oliveira > http://r42.eu/~luis/ >
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