[issue20440] Use Py_REPLACE/Py_XREPLACE macros

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

According to the results of recent poll [1], Py_SETREF is the most popular candidate. It was also one of leaders in previous poll [2], and this is a name used in original Antoine's proposition [3].

[1] http://comments.gmane.org/gmane.comp.python.devel/155654
[2] http://comments.gmane.org/gmane.comp.python.devel/145974
[3] https://mail.python.org/pipermail/python-dev/2008-May/079862.html

Hence there is a patch that introduces and uses the Py_SETREF macro.

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assignee:  -> serhiy.storchaka
versions: +Python 2.7, Python 3.6
Added file: http://bugs.python.org/file41380/py_setref.patch

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