Re: [boost] Python 3.2: convert convert PyObject* to PyUnicodeObject*?

Subject: Re: [boost] Python 3.2: convert convert PyObject* to PyUnicodeObject*?
From: Ralf W. Grosse-Kunstleve (rwgk_at_[hidden])
Date: 2011-04-06 14:43:55

You may get more help here:

http://mail.python.org/mailman/listinfo/cplusplus-sig

The code you quote is still the same on the boost svn trunk.

Maybe if you post a minimal reproducer someone using Python 3 will
pick this up. (I use Boost.Python only with Python 2.)

Ralf



----- Original Message ----
> From: Steve M. Robbins <steve_at_[hidden]>
> To: boost_at_[hidden]
> Cc: debian-python_at_[hidden]
> Sent: Tue, April 5, 2011 10:53:38 PM
> Subject: [boost] Python 3.2: convert convert PyObject* to PyUnicodeObject*?
> 
> Hi,
> 
> Boost 1.46.1 fails to build with Python 3.2 on linux (Debian).   The
> build fails with:
> 
> error: cannot convert -F¡PyObject*¢ to  ¡PyUnicodeObject*¢ for argument ¡1¢ to 
>¡Py_ssize_t  PyUnicodeUCS4_AsWideChar(PyUnicodeObject*, wchar_t*, Py_ssize_t)¢-A
> 
> at  this code:
> 
>       static std::wstring extract(PyObject*  intermediate)
>       {
>            std::wstring result(::PyObject_Length(intermediate), L' ');
>            if (!result.empty())
>            {
>               int err =  PyUnicode_AsWideChar(
>                    intermediate
>                 ,  &result[0]
>                 ,  result.size());
> 
>               if (err  == -1)
>                    throw_error_already_set();
>           }
>            return result;
>       }
> 
> Is  there an easy fix?
> 
> Thanks,
> -Steve
>