[issue46475] typing.Never and typing.assert_never

[Jelle Zijlstra]

Jelle Zijlstra <jelle.zijlstra at gmail.com> added the comment:

Based on feedback here and on typing-sig I'm now leaning towards adding typing.Never along with typing.assert_never. I'll submit a single patch for these as the documentation will be closely linked.

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title: Document use of NoReturn as a bottom type -> typing.Never and typing.assert_never
type:  -> enhancement
versions:  -Python 3.10, Python 3.9

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<https://bugs.python.org/issue46475>
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