Combining modules and namespaces

I'm trying generate C# bindings for a c++ API, and I'm running into
problems with the combination of modules and namespaces.

Some context on the problem I'm trying to solve: most of my c++ API is
defined in a single namespace. For the C# API, it was preferred to have a
more finegrained namespace structure. As far as I can see, the nspace
feature can't accomplish that exactly though. For that reason, I have tried
to use an alternative approach: split up the swig binding into multiple
modules (one per namespace), and use the -namespace cl argument for each of
the modules. Note that many of the modules depend on other modules. This
works well, except that I run into a few problems:

a) Other modules don't know anything about the namespace of an other
module. I'm working around this by adding
  - %typemap(csimports)
  - %pragma(csharp) imclassimports
This works ok, but it is manual work, i.e. harder to maintain. This is not
a critical problem, but it makes the definition files harder to write.

b) I end up with naming clashes in a very specific case. When a method
argment type has the same name as the method itself, C# doesn't correctly
resolve this. Example of the generated C# code:

using Ns;

void Rectangle(Rectangle rect) {
  xxxPINVOKE.Xxx_Rectangle(swigCPtr, Rectangle.getCPtr(rect));
  // ...
}

When using the nspace feature (which I probably can't use), this is not an
issue, because the generated C# code ends up as:

void Rectangle(Ns.Rectangle rect) {
  xxxPINVOKE.Xxx_Rectangle(swigCPtr, Ns.Rectangle.getCPtr(rect));
  // ...
}

You could argue that a method name should not be the same as the method
argument's type, but in many cases (within the naming conventions that are
used), it does make sense. So I would like to avoid renaming the methods if
possible.


My general question would be: Am I taking the correct approach to solve the
'single c++ namespace -> multiple C# namespaces' problem ? Or is there a
better way to do this ? If you have suggestions to solve the sub-problems
(a) and (b), that would be welcome too.

Note: I came across a similar question in this mailing list, but it doesn't
give a complete solution to my problem. It's also 10 years old, so a better
solution might be available now.
https://sourceforge.net/p/swig/mailman/message/24058732/

Let me know if you need more information.

Thanks,
Hans

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