Consider __all__.remove when determining explicit exports - #4638
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When checking for implicit re-exports, Pyrefly previously filtered only DunderAllEntry::Name entries from explicit __all__ definitions, ignoring subsequent __all__.remove(...) mutations. As a result, symbols removed from __all__ were still treated as explicitly exported. Compute the final explicit __all__ names by replaying mutations in source order (inserting on Name, removing on Remove), and use this resulting set for explicit export queries and implicit-reexport checks.
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
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Summary
Fixes #4564.
When checking for implicit re-exports, Pyrefly previously filtered only
DunderAllEntry::Nameentries from explicit__all__definitions, ignoring subsequent__all__.remove(...)mutations. As a result, symbols removed from__all__were still treated as explicitly exported.Changes
Exports::get_explicit_dunder_all_namesto compute the final set of user-defined__all__symbols by applying mutations in source order (inserting onName, removing onRemove), consistent withget_partially_known_dunder_allandwildcard.explicit_dunder_all_names: Option<SmallSet<Name>>onExportsand updatedget_explicit_dunder_all_names_iter,is_implicit_reexport, andchanged_exports.test_implicit_reexport_removed_from_allinpyrefly/lib/test/imports.rs.Test Plan
CARGO_BUILD_JOBS=1 cargo test -p pyrefly --lib test::imports::test_implicit_reexport_removed_from_all -- --exact --nocaptureCARGO_BUILD_JOBS=1 cargo check -p pyrefly --libCARGO_BUILD_JOBS=1 cargo check -p pyrefly --testspython3 test.py --no-test --no-tensor-shapes --no-conformance --no-jsonschema[tool.pyrefly.errors] implicit-reexport = "error"verifying that removing a name triggers the diagnostic and appending it back silences it.AI Disclosure
This PR was developed and verified with the assistance of an AI coding assistant (Google Antigravity).