[issue23699] Add a macro to ease writing rich comparisons

[Stefan Krah]

Stefan Krah added the comment:

I mean it's clearer to have:

    result = long_compare(self, other);
    return Py_cmp_to_bool(result, op);

than:

    result = long_compare(self, other);
    Py_RETURN_RICHCOMPARE(result, 0, op);


This is because in other places, like the proposed use
case in

  https://mail.python.org/pipermail/python-ideas/2015-March/032564.html ,


the macro actually *performs* the "rich" comparison. In the above case
it just *converts* the result of long_compare().


Maybe the distinction does not matter in practice, but I'm not
too happy with it.

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<http://bugs.python.org/issue23699>
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