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ruff/crates/red_knot_python_semantic/resources/mdtest/protocols.md
Matthew Mckee 3a5f1d46c0
[red-knot] Make' Type::in_type_expression()' exhaustive for Type::KnownInstance (#16836) 
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## Summary

fixes #15048 
We want to handle more types from Type::KnownInstance 

## Test Plan

Add tests for each type added explicitly in the match

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Co-authored-by: Dhruv Manilawala <dhruvmanila@gmail.com>
2025-03-19 07:36:28 -07:00

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Protocols

We do not support protocols yet, but to avoid false positives, we partially support some known protocols.

typing.SupportsIndex

from typing import SupportsIndex, Literal

def _(some_int: int, some_literal_int: Literal[1], some_indexable: SupportsIndex):
    a: SupportsIndex = some_int
    b: SupportsIndex = some_literal_int
    c: SupportsIndex = some_indexable

Invalid

from typing import Protocol

# error: [invalid-type-form] "`typing.Protocol` is not allowed in type expressions"
def f(x: Protocol) -> None:
    reveal_type(x)  # revealed: Unknown