Re: [boost] Re: Boost.Python compilation problem with latest Compaq comiler

From: David Abrahams (abrahams_at_[hidden])
Date: 2001-05-15 07:53:13

You might also try splitting the classes which generate these friend
functions into levels of inheritance corresponding to the dependencies
between the friend functions: the base classes would generate the
from_python functions which had to be used by derived classes. I don't know
whether this works or whether it is too much work...

-Dave

----- Original Message -----
From: <rwgk_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Monday, May 14, 2001 10:13 PM
Subject: [boost] Re: Boost.Python compilation problem with latest Compaq
comiler

> Thanks David, your suggestion actually works!
>
> Unfortunately, the same problem keeps creeping up with
> many other friend functions (e.g. all from_python).
> Adding function declarations all over the place does
> not seem to be a viable option to me. The source code would get
> really cluttered. Instead I will try to file a bug report.
> Hopefully this problem will get fixed in the next release.
>
> Thanks!
>         Ralf
>
> --- In boost_at_y..., "David Abrahams" <abrahams_at_m...> wrote:
> > Hi Ralf,
> >
> > You might try adding some function declarations in the calling
> functions,
> > e.g.:
> >
> >     friend T* from_python(PyObject* obj, boost::python::type<T*>)
> >     {
> >         T* non_null_from_python(PyObject*, boost::python::type<T*>);
> >         if (obj == Py_None)
> >             return 0;
> >         else
> >             return non_null_from_python(obj, boost::python::type<T*>
> ());
> >     }
> >     ...
> >     // Convert to T&
> >     friend T& from_python(PyObject* p, boost::python::type<T&>)
> >         { T* non_null_from_python(PyObject*,
> boost::python::type<T*>);
> >           return
> > *boost::python::detail::check_non_null(non_null_from_python(p,
> > boost::python::type<T*>())); }
> >
> > Best of luck,
> > Dave
>
>
>
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