[C++-sig] Re: Hnadling Python exceptions in C++

[David Abrahams]

From: "Berthold Höllmann" <hoel at germanlloyd.org>


> OK, after thinking a bit about such a facility here is my idea. It
> would be nice to have a C++ exception class that reads out PyErr_Fetch
> when instantiated and can be converted back into a Python exception if
> needed. I tried to start an implementation.

Hi Berthold,

Before posting an implementation, could you please explain the use-case
you're trying to cover, show the interface, and how it would be used?

> The attached code is
> untested, it is just posted to share the idea.

Please don't use tabs when posting code; as you can see they disappear.

schnipp-schnapp-to-you-too-ly y'rs,
dave

> except.hpp:
> --8<------------------------schnipp------------------------->8---
> #ifndef EXCEPT_BH20020719_H_
> #define EXCEPT_BH20020719_H_
>
> #include <Python.h>
> #include <string>
>
> namespace boost {
>   namespace python {
>     namespace Error {
>       class PyErrHandler {
>       public:
> PyErrHandler();
> virtual void printOn(std::ostream&) const;
>       private:
> PyObject *stype, *svalue, *straceback;
>       };
>       std::ostream& operator<<(std::ostream& os,
>        const PyErrHandler& el);
>     }
>   }
> }
>
> #endif // EXCEPT_BH20020719_H_
> --8<------------------------schnapp------------------------->8---