Re: [pygccxml-commit] string type mismatch between python and C++

[Roman Y. <rom...@gm...>]

On Mon, Apr 7, 2008 at 9:00 AM, Johnson Lu <joh...@op...> wrote:
> Hi:
>
> I am extending an embedded python using PY++ (a great product, along with
> Boost, IMHO),

Thanks

> my problem is that the C++ function being called from Python
> takes a (wstring) or wchar argument, but the corresponding function
> signature assigned to Python seems to take a regular str.  So when I try to
> make a call I get…
>
>
>
>     ClassificationOutput.setApplicationName(ClassificationOutput, str)
>
> did not match C++ signature:
>
>     setApplicationName(struct ClassificationOutput_wrapper {lvalue}, class
> std::basic_string<unsigne
>
> d short,struct std::char_traits<unsigned short>,class
> std::allocator<unsigned short> > applicationNa
>
> me)
>
>     setApplicationName(class ClassificationOutput {lvalue}, class
> std::basic_string<unsigned short,s
>
> truct std::char_traits<unsigned short>,class std::allocator<unsigned short>
> > applicationName)
>
>
>
> And obviously that doesn't work.  The funny thing is while python can't pass
> a string into C++, C++ can pass that wchar to Python just fine.   This
> simple string exchange seems such common place that it must have been solved
> multiple times before, but I just can't get a handle on how to deal with it.

Can you post small C++ and & Python code that reproduce the problem.
Also what compiler/STL do you use?
Another question: why your string is defined using unsigned short,
instead of wchar_t?


-- 
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/