[issue20092] type() constructor should bind __int__ to __index__ when __index__ is defined and __int__ is not

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

See also the discussion on the duplicated issue33039.

Few months ago I wrote the PR that makes constructors of int, float and complex to fall back to __index__ if corresponding special methods __int__, __float__ and __complex__ are not defined. I did not exposed it to public because binding __int__ to __index__ looks better to me. But perhaps some tests from that PR can be used in an alternate PR.

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components: +Interpreter Core
nosy: +serhiy.storchaka
versions: +Python 3.8 -Python 3.5

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