[Ns-developers] NS-3 PyBindGen again
mathieu.lacage at sophia.inria.fr
Mon Jan 7 07:34:39 PST 2008
On Mon, 2008-01-07 at 13:52 +0000, Gustavo Carneiro wrote:
> > but this code compiles which appears to indicate it can be
> done. I
> This is really weird because my c++ spec states clearly that
> it is not
> possible to copy std::type_info objects. i.e., their copy
> and assignment operators are expected to be private.
> I ran into that problem, but then I changed the return type to "const
> std::type_info &". Returning by reference does not require copying,
> so all is well. Same could be done with TraceDoc, but TraceDoc offers
> a list of strings, with each parameter type, matching by a single
> type name string is much easier.
Are you sure that it is safe to assume that string equality of the
type_info::name () value is equivalent to std::type_info equality ?
> > This API (template <typename T> bool GetElement (T &context)
> const) is
> > based on templated methods. I need to generate all method
> > instantiations, but then the method names have to be mangled
> with the
> > type names. Again, adding dynamic introspection features to
> the C++
> > API would be most welcome for Python bindings, else user
> will have to
> > call methods with mangled names.
> Clearly, asking the user to use mangled names is not a
> Well, this is one more example among many where NS-3 is favouring C++
> programming in detriment of language bindings. I have known this for
> a very long time, and accept it. That's why it is perhaps prudent to
> not wait until NS-3 API is finalized to start making language
> bindings, because making these bindings will shed some light on what
> needs to be improved in the API in order to better support them...
This specific problem is quite similar to the problem of binding the
Packet and Tags classes, I think. I don't have any specific solution to
this problem but it is something which we need to addressed before the
february release if you want to target that release for merging.
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