[C++-sig] throw_error_already_set()

[Niall Douglas]

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Now I have my custom exception which interrogates python and builds a 
very useful C++ exception replete with python traceback, I'd like 
this to be generated whenever there's a python exception raised.

Unfortunately, the C++ exception error_already_set appears to be 
thrown not only for python exceptions but also for internal BPL 
errors. I'd far prefer BPL to keep throwing error_already_set when it 
can't match parameter types etc. and throw my exception when it's 
just a plain python problem. OTOH, BPL seems to set the python error 
state when it throws error_already_set so maybe this is okay.

Is it possible to modify BPL to do this or am I relegated to wrapping 
every BPL call with a try...catch(error_already_set &)? I did notice 
there only appears to be one place where error_already_set is caught 
within BPL - therefore couldn't I literally just do a find & replace 
(or better, a #define throw_error_already_set 
FXPython::int_throwPythonException() so I don't have problems with 
merging new releases)

Cheers,
Niall





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