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David Peter 04457f99b6
[ty] Protocols: Fixpoint iteration for fully-static check (#17880) 
## Summary

A recursive protocol like the following would previously lead to stack
overflows when attempting to create the union type for the `P | None`
member, because `UnionBuilder` checks if element types are fully static,
and the fully-static check on `P` would in turn list all members and
check whether all of them were fully static, leading to a cycle.

```py
from __future__ import annotations

from typing import Protocol

class P(Protocol):
    parent: P | None
```

Here, we make the fully-static check on protocols a salsa query and add
fixpoint iteration, starting with `true` as the initial value (assume
that the recursive protocol is fully-static). If the recursive protocol
has any non-fully-static members, we still return `false` when
re-executing the query (see newly added tests).

closes #17861

## Test Plan

Added regression test
2025-05-07 08:55:21 +02:00
..
ruff Default to latest supported Python version for version-related syntax errors (#17529) 2025-05-06 10:19:13 -04:00
ruff_annotate_snippets ruff_annotate_snippets: address unused code warnings 2025-04-07 08:24:08 -04:00
ruff_benchmark Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_cache Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_db Show a warning at the end of the diagnostic list if there are any fatal warnings (#17855) 2025-05-06 07:14:21 +00:00
ruff_dev Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_diagnostics
ruff_formatter Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_graph Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
ruff_index Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_linter Default to latest supported Python version for version-related syntax errors (#17529) 2025-05-06 10:19:13 -04:00
ruff_macros Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_notebook Split SourceLocation into LineColumn and SourceLocation (#17587) 2025-04-27 11:27:33 +01:00
ruff_python_ast Implement deferred annotations for Python 3.14 (#17658) 2025-05-05 06:40:36 -05:00
ruff_python_ast_integration_tests Visit Identifier node as part of the SourceOrderVisitor (#17110) 2025-04-01 16:58:09 +02:00
ruff_python_codegen Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_python_formatter Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_python_index Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_python_literal Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_python_parser Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_python_resolver Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_python_semantic [isort] Check full module path against project root(s) when categorizing first-party (#16565) 2025-05-05 11:40:01 -05:00
ruff_python_stdlib Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_python_trivia Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_python_trivia_integration_tests Pass ParserOptions to the parser (#16220) 2025-02-19 10:50:50 -05:00
ruff_server Default to latest supported Python version for version-related syntax errors (#17529) 2025-05-06 10:19:13 -04:00
ruff_source_file Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_text_size Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ruff_wasm Default to latest supported Python version for version-related syntax errors (#17529) 2025-05-06 10:19:13 -04:00
ruff_workspace Default to latest supported Python version for version-related syntax errors (#17529) 2025-05-06 10:19:13 -04:00
ty [ty] Support generate-shell-completion (#17879) 2025-05-06 18:04:57 -07:00
ty_ide Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ty_project [ty] Fix standalone expression type retrieval in presence of cycles (#17849) 2025-05-05 13:52:08 +02:00
ty_python_semantic [ty] Protocols: Fixpoint iteration for fully-static check (#17880) 2025-05-07 08:55:21 +02:00
ty_server Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ty_test Use #[expect(lint)] over #[allow(lint)] where possible (#17822) 2025-05-03 21:20:31 +02:00
ty_vendored Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
ty_wasm [ty] Fix duplicate diagnostics for unresolved module when an import from statement imports multiple members (#17886) 2025-05-06 12:37:10 +01:00