Julien Palard added the comment:
Hi Raymond,
I don't like having the converters in the C implementation too, that's why I'm
working on issue28933 to clean this.
> letting the C function handle both -1 and None in the implementation rather
> than in AC?
It works, yes. But I prefer to clearly split responsibilities: AC being
responsible of adapting argument from PyObjects to C types, and C functions
being responsible of ... doing their job.
If the idea in issue28933 is accepted, we'll be able to declare hi as simply as:
hi: Py_ssize_t(c_default="-1") = None
meaning "C function will get a Py_ssize_t, default value for C code is -1, None
is documented, and None can be passed to get the C default value", that's this
last point "None can be passed to get the C default value" that I introduce in
issue28933.
With this syntax, both C converters and the python hi_parameter_converter can
be dropped.
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<http://bugs.python.org/issue28754>
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