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4B Make infer_condition_value recognize the whole truth table by sterliakov · Pull Request #18944 · python/mypy · GitHub
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Make infer_condition_value recognize the whole truth table #18944

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Merged
merged 7 commits into from
Jun 5, 2025
Merged

Make infer_condition_value recognize the whole truth table #18944

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cae4615
Make infer_condition_value recognize the whole truth table
sterliakov Apr 20, 2025
a500826
Test that we do not try to handle other operators
sterliakov Apr 21, 2025
648bd84
Remove short-circuiting logic here, it is safe to check truthiness of…
sterliakov Apr 21, 2025
7d2b466
Remove duplicated check from condition
sterliakov May 1, 2025
5120c4e
Merge remote-tracking branch 'upstream/master' into bugfix/gh-18901-r…
sterliakov May 1, 2025
29bd0c2
Do not depend on literal inference in test
sterliakov May 2, 2025
0ec9e82
Merge branch 'master' into bugfix/gh-18901-reachability
sterliakov Jun 4, 2025
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Test that we do not try to handle other operators
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@sterliakov
sterliakov committed Apr 21, 2025
commit a50082672f473792ed4135e7bc9108f1684c2535
10 changes: 10 additions & 0 deletions test-data/unit/check-unreachable-code.test
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Expand Up @@ -540,6 +540,16 @@ reveal_type(not_or_t) # N: Revealed type is "builtins.bool"
reveal_type(not_or_f) # N: Revealed type is "Literal['s']"
[builtins fixtures/ops.pyi]

[case testConditionalValuesUnsupportedOps]
# flags: --platform linux
import sys

unary_minus = -(sys.platform == 'linux') and 's'
binary_minus = ((sys.platform == 'linux') - (sys.platform == 'linux')) and 's'
reveal_type(unary_minus) # N: Revealed type is "Union[Literal[0], builtins.str]"
reveal_type(binary_minus) # N: Revealed type is "Union[Literal[0], builtins.str]"
[builtins fixtures/ops.pyi]

[case testShortCircuitAndWithConditionalAssignment]
# flags: --platform linux
import sys
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