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Changes how TypeGuard types are checked in subtypes #11314

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Merged
merged 3 commits into from
Oct 30, 2021
Merged

Changes how TypeGuard types are checked in subtypes #11314

merged 3 commits into from
Oct 30, 2021

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sobolevn
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Now two functions are not considered subtypes if:

  1. First returns TypeGuard, other returns bool. We respect subtyping direction here. TypeGuard is considered to be subtype of bool
  2. First returns TypeGuard[int], second returns TypeGuard[str]

Closes #11307

sobolevn
sobolevn commented Oct 11, 2021
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JukkaL
JukkaL reviewed Oct 13, 2021
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sobolevn
sobolevn commented Oct 13, 2021
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Thanks! Now it should be ready.

@sobolevn sobolevn mentioned this pull request Oct 30, 2021
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@hauntsaninja hauntsaninja merged commit 47d2ea5 into python:master Oct 30, 2021
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Thank you!

@sobolevn
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Thanks everyone!

@hauntsaninja hauntsaninja mentioned this pull request Oct 31, 2021
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@sobolevn sobolevn mentioned this pull request Oct 31, 2021
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@sobolevn sobolevn mentioned this pull request Dec 29, 2021
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tushar-deepsource pushed a commit to DeepSourceCorp/mypy that referenced this pull request Jan 20, 2022
@sobolevn @tushar-deepsource
Changes how TypeGuard types are checked in subtypes (python#11314)
c2dc223 
Fixes python#11307
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Successfully merging this pull request may close these issues.

bool and TypeGuard incorrect match in @overload method
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