mirror of
https://github.com/astral-sh/ruff.git
synced 2025-11-18 19:41:34 +00:00
1d111c8780
## Summary In general, when we have an invalid assignment (inferred assigned type is not assignable to declared type), we fall back to inferring the declared type, since the declared type is a more explicit declaration of the programmer's intent. This also maintains the invariant that our inferred type for a name is always assignable to the declared type for that same name. For example: ```py x: str = 1 reveal_type(x) # revealed: str ``` We weren't following this pattern for dictionary literals inferred (via type context) as a typed dictionary; if the literal was not valid for the annotated TypedDict type, we would just fall back to the normal inferred type of the dict literal, effectively ignoring the annotation, and resulting in inferred type not assignable to declared type. ## Test Plan Added mdtest assertions. |
||
|---|---|---|
| .. | ||
| corpus | ||
| mdtest | ||
| primer | ||
| README.md | ||
Markdown files within the mdtest/ subdirectory are tests of type inference and type checking;
executed by the tests/mdtest.rs integration test.
See crates/ty_test/README.md for documentation of this test format.