Re: [pygccxml-development] Implicit virtual functions in derived classes

[Julian S. <jul...@rs...>]

Roman Yakovenko wrote:
> Thank you very much for bug reporting. Few minutes ago I committed fix
> and added new test case.
> 
> The whole revision content:
> http://pygccxml.svn.sourceforge.net/viewvc/pygccxml?view=rev&revision=1238
> 
> The fix:
> http://pygccxml.svn.sourceforge.net/viewvc/pygccxml/pyplusplus_dev/pyplusplus/decl_wrappers/class_wrapper.py?r1=1238&r2=1237&pathrev=1238
> 
> I tested the fix again Py++ 0.9.5, but I guess it will also work for
> your version too.

There's also another problem with this approach (both your patch and my 
similar fix): the API I'm wrapping is a rather large class hierarchy, 
and nearly all classes are derived from a common base class with a large 
number of virtual functions.

Let's say for the sake of argument that it's 100 classes and 10 virtual 
functions in the common base class. This leads to 1000 times the wrapper 
functions generated, with almost identical code in each wrapper. I found 
that my Py++ wrapper library, which is already quite large at roughly 20 
MB, gets blown up to over 40 MB once I include the base classes' virtual 
functions.

I wonder if it would be possible to derive wrappers from the base class 
wrapper to help reduce this overhead? E.g. in my example, derive 
B_wrapper from A_wrapper? Ideally you could also reuse the registration 
code so that register_B_class would call something like 
register_A_class_virtuals.

Thanks,

Julian