[issue40025] enum: _generate_next_value_ is not called if its definition occurs after calls to auto()

[Ethan Furman]

Ethan Furman <ethan at stoneleaf.us> added the comment:

Jonathan Hsu, you are correct -- and "don't do that" was my initial response; but Enum takes many pains to make sure the user doesn't shoot themselves in the foot, so raising a TypeError is appropriate instead of silently doing the wrong thing.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40025>
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