Re: Lua bindings break when upgrading from swig 2.0.9 to 4.0.1

Hi Merijn

The %nspace directive provides support for multiple C++ namespaces in the
target language. While this is not provided for all target languages, Lua
support is now available. I suggest you try out the official nspace
support. There is an example in the Examples/Lua/nspace directory and
documentation in the Lua chapter. There is also some info in the CHANGES
file for version 3.0.0.

William


On Thu, 19 Nov 2020 at 14:34, Merijn Broeren via Swig-user <
[email protected]> wrote:

> Hello,
>
>
>
> We're using swig for many years to create Perl, Python and Lua bindings
> for many of our internal C++ libraries. We're now having to upgrade to
> Python 3 which makes it necessary to upgrade swig as well. We've been using
> swig 2.0.9 for years and are attempting to jump to swig 4.0.1. This works
> well for Perl and Python, but we are seeing an issue in Lua.
>
>
>
> We've always had a terrible hack in place to deal with the issue of having
> C++ classes with the same name in different namespaces, and this works
> fine in swig 2, but breaks in swig 4. A much simplified example
> demonstrating the issue, and our hack, can be found here: https://
> github.com/pdtpartners/swig-lua-repro.
>
>
>
> Could somebody tell us how to go about doing this in Swig 4? Or whether
> we're missing a better way of doing this? Renaming our classes to not
> have nameclashes is not an option though.
>
>
>
> Cheers,
>
> Merijn
>
>
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