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Showing content from https://mail.python.org/pipermail/python-dev/2003-April/034495.html below:

[Python-Dev] Re: tp_clear return value

[Python-Dev] Re: tp_clear return value [Python-Dev] Re: tp_clear return valueGreg Ewing greg@cosc.canterbury.ac.nz
Fri, 11 Apr 2003 12:54:01 +1200 (NZST)
> it would be nice to get rid of the endlessly repeated ... ugly
> incantations out of the many tp_traverse slots, in return for putting
> a little bit of setjmp/longjmp ugliness in exactly four functions
> hiding in a single module.

I'd be pretty nervous about having any longjmps anywhere
near anything Python.

If you do this, you'll have to make it very clear that
tp_traverse implementations MUST NOT alter any Python
ref counts, or rely in any other way on running to 
completion.

Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury,	   | A citizen of NewZealandCorp, a	  |
Christchurch, New Zealand	   | wholly-owned subsidiary of USA Inc.  |
greg@cosc.canterbury.ac.nz	   +--------------------------------------+



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