[ty] Normalize single-member enums to their instance type#19502
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[ty] Normalize single-member enums to their instance type#19502
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sharkdp
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sharkdp
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Jul 23, 2025
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| Type::EnumLiteral(enum_literal) | ||
| if is_single_member_enum(db, enum_literal.enum_class(db)) => | ||
| { | ||
| // Always normalize single-member enums to their class instance (`Literal[Single.VALUE]` => `Single`) | ||
| enum_literal.enum_class_instance(db) | ||
| } |
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I chose this direction, because the other seems more costly in terms of performance: If we wanted to normalize Single => Literal[Single.VALUE], we would have to check every nominal instance type, to see if it's an enum — which requires a MRO traversal.
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AlexWaygood
approved these changes
Jul 23, 2025
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Oh, good call — checked now. Everything still passing. We also didn't have any single-member enums in the pool of types. I added one now. |
UnboundVariable
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Jul 23, 2025
* main: (28 commits) [ty] highlight the argument in `static_assert` error messages (astral-sh#19426) [ty] Infer single-valuedness for enums based on `int`/`str` (astral-sh#19510) [ty] Restructure submodule query around `File` dependency [ty] Make `Module` a Salsa ingredient [ty] Reachability analysis for `isinstance(…)` branches (astral-sh#19503) [ty] Normalize single-member enums to their instance type (astral-sh#19502) [ty] Invert `ty_ide` and `ty_project` dependency (astral-sh#19501) [ty] Implement mock language server for testing (astral-sh#19391) [ty] Detect enums if metaclass is a subtype of EnumType/EnumMeta (astral-sh#19481) [ty] perform type narrowing for places marked `global` too (astral-sh#19381) [ty] Use `ThinVec` for sub segments in `PlaceExpr` (astral-sh#19470) [ty] Splat variadic arguments into parameter list (astral-sh#18996) [`flake8-pyi`] Skip fix if all `Union` members are `None` (`PYI016`) (astral-sh#19416) Skip notebook with errors in ecosystem check (astral-sh#19491) [ty] Consistent use of American english (in rules) (astral-sh#19488) [ty] Support iterating over enums (astral-sh#19486) Fix panic for illegal `Literal[…]` annotations with inner subscript expressions (astral-sh#19489) Move fix suggestion to subdiagnostic (astral-sh#19464) [ty] Implement non-stdlib stub mapping for classes and functions (astral-sh#19471) [ty] Disallow illegal uses of `ClassVar` (astral-sh#19483) ... # Conflicts: # crates/ty_ide/src/goto.rs
dcreager
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Jul 23, 2025
* main: [ty] Fix narrowing and reachability of class patterns with arguments (#19512) [ty] Implemented partial support for "find references" language server feature. (#19475) [`flake8-use-pathlib`] Add autofix for `PTH101`, `PTH104`, `PTH105`, `PTH121` (#19404) [`perflint`] Parenthesize generator expressions (`PERF401`) (#19325) [`pep8-naming`] Fix `N802` false positives for `CGIHTTPRequestHandler` and `SimpleHTTPRequestHandler` (#19432) [`pylint`] Handle empty comments after line continuation (`PLR2044`) (#19405) Move concise diagnostic rendering to `ruff_db` (#19398) [ty] highlight the argument in `static_assert` error messages (#19426) [ty] Infer single-valuedness for enums based on `int`/`str` (#19510) [ty] Restructure submodule query around `File` dependency [ty] Make `Module` a Salsa ingredient [ty] Reachability analysis for `isinstance(…)` branches (#19503) [ty] Normalize single-member enums to their instance type (#19502) [ty] Invert `ty_ide` and `ty_project` dependency (#19501) [ty] Implement mock language server for testing (#19391) [ty] Detect enums if metaclass is a subtype of EnumType/EnumMeta (#19481) [ty] perform type narrowing for places marked `global` too (#19381)
AlexWaygood
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Jul 25, 2025
## Summary Fixes astral-sh/ty#874 Labeling this as `internal`, since we haven't released the enum-expansion feature. ## Test Plan New Markdown tests
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Summary
Fixes astral-sh/ty#874
Labeling this as
internal, since we haven't released the enum-expansion feature.Test Plan
New Markdown tests