On 18 Jan 2023, at 15:35, Frederick Virchanza Gotham <cauldwell.thomas@gmail.com> wrote:

On Wed, Jan 18, 2023 at 3:07 PM Jason McKesson wrote:

Also, this proposal seems to be missing the biggest issue with
cross-language exception handling: the fact that you can't throw
exceptions across languages. The only thing you *can* do is catch
exceptions on the source language end, convert them into some data
packet, and throw a different exception on the destination language
side.

Yes this is what I had in mind. Behind the scenes, the C++ compiler
would catch the Python exception and then throw something that C++ can
deal with "such as std::aliens::python::exception".

In PyCXX I allows exceptions to go into and out of python and C++.

You can raise in C++ go into python and back into C++ and the exception arrives as expected.

You can riase in Python fo into C++ and back to Python and again the exception arrives as expected.

That is as long as its a python exception.

Barry

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