Victor Hugo Gomes c0dbcb3434 [flake8-pyi] Implement PYI018 (#6018) ... ## Summary Check for unused private `TypeVar`. See [original implementation](2a86db8271/pyi.py (L1958)). ``` $ flake8 --select Y018 crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi:4:1: Y018 TypeVar "_T" is not used crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi:5:1: Y018 TypeVar "_P" is not used ``` ``` $ ./target/debug/ruff --select PYI018 crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi --no-cache crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi:4:1: PYI018 TypeVar `_T` is never used crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi:5:1: PYI018 TypeVar `_P` is never used Found 2 errors. ``` In the file `unused_private_type_declaration.rs`, I'm planning to add other rules that are similar to `PYI018` like the `PYI046`, `PYI047` and `PYI049`. ref #848 ## Test Plan Snapshots and manual runs of flake8.		2023-07-26 22:56:15 +00:00
..
analyze	Remove parser dependency from ruff-python-ast (#6096)	2023-07-26 17:47:22 +02:00
binding.rs	[flake8-pyi] Implement PYI018 (#6018)	2023-07-26 22:56:15 +00:00
context.rs	Remove separate ReferenceContext enum (#4631)	2023-05-24 15:12:38 +00:00
definition.rs	Remove parser dependency from ruff-python-ast (#6096)	2023-07-26 17:47:22 +02:00
globals.rs	Remove parser dependency from ruff-python-ast (#6096)	2023-07-26 17:47:22 +02:00
lib.rs	Move StarImport to its own module (#5186)	2023-06-20 13:12:46 -04:00
model.rs	Add comment regarding class scope short circuit (#6101)	2023-07-26 14:55:05 -05:00
node.rs	Remove parser dependency from ruff-python-ast (#6096)	2023-07-26 17:47:22 +02:00
reference.rs	Remove parser dependency from ruff-python-ast (#6096)	2023-07-26 17:47:22 +02:00
scope.rs	Replace NoHashHasher usages with FxHashMap (#6049)	2023-07-24 23:41:57 +00:00
star_import.rs	Move StarImport to its own module (#5186)	2023-06-20 13:12:46 -04:00