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David Peter a90e404c3f [red-knot] PEP 695 type aliases (#14357 ) ## Summary Add support for (non-generic) type aliases. The main motivation behind this was to get rid of panics involving expressions in (generic) type aliases. But it turned out the best way to fix it was to implement (partial) support for type aliases. ```py type IntOrStr = int \| str reveal_type(IntOrStr) # revealed: typing.TypeAliasType reveal_type(IntOrStr.__name__) # revealed: Literal["IntOrStr"] x: IntOrStr = 1 reveal_type(x) # revealed: Literal[1] def f() -> None: reveal_type(x) # revealed: int \| str ``` ## Test Plan - Updated corpus test allow list to reflect that we don't panic anymore. - Added Markdown-based test for type aliases (`type_alias.md`)	2024-11-22 08:47:14 +01:00
..
mdtest	[red-knot] PEP 695 type aliases (#14357 )	2024-11-22 08:47:14 +01:00
README.md

[red-knot] PEP 695 type aliases (#14357 )

## Summary

Add support for (non-generic) type aliases. The main motivation behind
this was to get rid of panics involving expressions in (generic) type
aliases. But it turned out the best way to fix it was to implement
(partial) support for type aliases.

```py
type IntOrStr = int | str

reveal_type(IntOrStr)  # revealed: typing.TypeAliasType
reveal_type(IntOrStr.__name__)  # revealed: Literal["IntOrStr"]

x: IntOrStr = 1

reveal_type(x)  # revealed: Literal[1]

def f() -> None:
    reveal_type(x)  # revealed: int | str
```

## Test Plan

- Updated corpus test allow list to reflect that we don't panic anymore.
- Added Markdown-based test for type aliases (`type_alias.md`)

2024-11-22 08:47:14 +01:00

mdtest

[red-knot] PEP 695 type aliases (#14357 )

2024-11-22 08:47:14 +01:00

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/red_knot_test/README.md for documentation of this test format.