[ty] Add KnownUnion::to_type()
#21948
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AlexWaygood
commented
Dec 12, 2025
Comment on lines
-7299
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7290
| let ty = match class.known(db) { | ||
| Some(KnownClass::Complex) => UnionType::from_elements( | ||
| db, | ||
| [ | ||
| KnownClass::Int.to_instance(db), | ||
| KnownClass::Float.to_instance(db), | ||
| KnownClass::Complex.to_instance(db), | ||
| ], | ||
| ), | ||
| Some(KnownClass::Float) => UnionType::from_elements( | ||
| db, | ||
| [ | ||
| KnownClass::Int.to_instance(db), | ||
| KnownClass::Float.to_instance(db), | ||
| ], | ||
| ), | ||
| _ if class.is_typed_dict(db) => { | ||
| Type::typed_dict(class.default_specialization(db)) | ||
| } | ||
| Some(KnownClass::Complex) => KnownUnion::Complex.to_type(db), | ||
| Some(KnownClass::Float) => KnownUnion::Float.to_type(db), | ||
| _ => Type::instance(db, class.default_specialization(db)), | ||
| }; | ||
| Ok(ty) | ||
| } | ||
| Type::GenericAlias(alias) if alias.is_typed_dict(db) => Ok(Type::typed_dict(*alias)), | ||
| Type::GenericAlias(alias) => Ok(Type::instance(db, ClassType::from(*alias))), |
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whether or not the class is a TypedDict is also checked in the Type::instance() call. Checking whether the class-literal/generic-alias is a TypedDict before calling Type::instance() is redundant.
MichaReiser
approved these changes
Dec 12, 2025
Diagnostic diff on typing conformance testsNo changes detected when running ty on typing conformance tests ✅ |
|
dcreager
added a commit
that referenced
this pull request
Dec 13, 2025
* origin/main: (22 commits) [ty] Allow gradual lower/upper bounds in a constraint set (#21957) [ty] disallow explicit specialization of type variables themselves (#21938) [ty] Improve diagnostics for unsupported binary operations and unsupported augmented assignments (#21947) [ty] update implicit root docs (#21955) [ty] Enable even more goto-definition on inlay hints (#21950) Document known lambda formatting deviations from Black (#21954) [ty] fix hover type on named expression target (#21952) Bump benchmark dependencies (#21951) Keep lambda parameters on one line and parenthesize the body if it expands (#21385) [ty] Improve resolution of absolute imports in tests (#21817) [ty] Support `__all__ += submodule.__all__` [ty] Change frequency of invalid `__all__` debug message [ty] Add `KnownUnion::to_type()` (#21948) [ty] Classify `cls` as class parameter (#21944) [ty] Stabilize rename (#21940) [ty] Ignore `__all__` for document and workspace symbol requests [ty] Attach db to background request handler task (#21941) [ty] Fix outdated version in publish diagnostics after `didChange` (#21943) [ty] avoid fixpoint unioning of types containing current-cycle Divergent (#21910) [ty] improve bad specialization results & error messages (#21840) ...
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Summary
A small refactor followup to #21886. Now that we have a
KnownUnionenum, we can use it in more places to make our code a bit more DRYTest Plan
pure refactor; no added tests