Re: That depends... (Was: Regarding assignment to struct)

On Sat, 3 May 2025 01:13:48 -0000 (UTC), Lew Pitcher wrote:

But... I remembered this (apparently) seldom-used feature of being able
to pass a struct by value up and down the chain (down, as a function
argument, up as a function return value). As I've not done this before,
and I've not /seen/ it done in other peoples code, I wonder how viable
a solution it might be.

As someone who has written lots of Python wrappers around C libraries, one
thing I could never get to work right was passing structs as arguments by
value. (The case of returning a struct as a function result never arose.)
Presumably this was a limitation of libffi, which lies at the heart of the
Python ctypes module.

Luckily, in the one case where this happened, there were alternative API
calls I was able to use.