Bump version to 0.0.93

.pre-commit-config.yaml

@@ -1,8 +1,8 @@
 repos:
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.40
+    rev: v0.0.93
     hooks:
-      - id: lint
+      - id: ruff
 
   - repo: https://github.com/abravalheri/validate-pyproject
     rev: v0.10.1

Cargo.lock

@@ -37,6 +37,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "anes"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b46cbb362ab8752921c97e041f5e366ee6297bd428a31275b9fcf1e380f7299"
+
 [[package]]
 name = "annotate-snippets"
 version = "0.6.1"
@@ -368,6 +374,12 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c1db59621ec70f09c5e9b597b220c7a2b43611f4710dc03ceb8748637775692c"
 
+[[package]]
+name = "cast"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
+
 [[package]]
 name = "cc"
 version = "1.0.73"
@@ -416,6 +428,45 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fff857943da45f546682664a79488be82e69e43c1a7a2307679ab9afb3a66d2e"
 
+[[package]]
+name = "ciborium"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0c137568cc60b904a7724001b35ce2630fd00d5d84805fbb608ab89509d788f"
+dependencies = [
+ "ciborium-io",
+ "ciborium-ll",
+ "serde",
+]
+
+[[package]]
+name = "ciborium-io"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "346de753af073cc87b52b2083a506b38ac176a44cfb05497b622e27be899b369"
+
+[[package]]
+name = "ciborium-ll"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "213030a2b5a4e0c0892b6652260cf6ccac84827b83a85a534e178e3906c4cf1b"
+dependencies = [
+ "ciborium-io",
+ "half",
+]
+
+[[package]]
+name = "clap"
+version = "3.2.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "71655c45cb9845d3270c9d6df84ebe72b4dad3c2ba3f7023ad47c144e4e473a5"
+dependencies = [
+ "bitflags",
+ "clap_lex 0.2.4",
+ "indexmap",
+ "textwrap 0.16.0",
+]
+
 [[package]]
 name = "clap"
 version = "4.0.15"
@@ -425,7 +476,7 @@ dependencies = [
  "atty",
  "bitflags",
  "clap_derive",
- "clap_lex",
+ "clap_lex 0.3.0",
  "once_cell",
  "strsim",
  "termcolor",
@@ -444,6 +495,15 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "clap_lex"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2850f2f5a82cbf437dd5af4d49848fbdfc27c157c3d010345776f952765261c5"
+dependencies = [
+ "os_str_bytes",
+]
+
 [[package]]
 name = "clap_lex"
 version = "0.3.0"
@@ -466,6 +526,15 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "codegen"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff61280aed771c3070e7dcc9e050c66f1eb1e3b96431ba66f9f74641d02fc41d"
+dependencies = [
+ "indexmap",
+]
+
 [[package]]
 name = "codespan-reporting"
 version = "0.11.1"
@@ -539,6 +608,42 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "criterion"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7c76e09c1aae2bc52b3d2f29e13c6572553b30c4aa1b8a49fd70de6412654cb"
+dependencies = [
+ "anes",
+ "atty",
+ "cast",
+ "ciborium",
+ "clap 3.2.23",
+ "criterion-plot",
+ "itertools",
+ "lazy_static",
+ "num-traits",
+ "oorandom",
+ "plotters",
+ "rayon",
+ "regex",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "tinytemplate",
+ "walkdir",
+]
+
+[[package]]
+name = "criterion-plot"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b50826342786a51a89e2da3a28f1c32b06e387201bc2d19791f622c673706b1"
+dependencies = [
+ "cast",
+ "itertools",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.6"
@@ -1032,6 +1137,12 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "half"
+version = "1.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eabb4a44450da02c90444cf74558da904edde8fb4e9035a9a6a4e15445af0bd7"
+
 [[package]]
 name = "hashbrown"
 version = "0.12.3"
@@ -1562,6 +1673,12 @@ version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e82dad04139b71a90c080c8463fe0dc7902db5192d939bd0950f074d014339e1"
 
+[[package]]
+name = "oorandom"
+version = "11.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
+
 [[package]]
 name = "opaque-debug"
 version = "0.2.3"
@@ -1770,6 +1887,34 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "plotters"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2538b639e642295546c50fcd545198c9d64ee2a38620a628724a3b266d5fbf97"
+dependencies = [
+ "num-traits",
+ "plotters-backend",
+ "plotters-svg",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "plotters-backend"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "193228616381fecdc1224c62e96946dfbc73ff4384fba576e052ff8c1bea8142"
+
+[[package]]
+name = "plotters-svg"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f9a81d2759aae1dae668f783c308bc5c8ebd191ff4184aaa1b37f65a6ae5a56f"
+dependencies = [
+ "plotters-backend",
+]
+
 [[package]]
 name = "polling"
 version = "2.3.0"
@@ -2045,17 +2190,19 @@ dependencies = [
 
 [[package]]
 name = "ruff"
-version = "0.0.78"
+version = "0.0.93"
 dependencies = [
  "anyhow",
  "assert_cmd",
  "bincode",
  "cacache",
  "chrono",
- "clap",
+ "clap 4.0.15",
  "clearscreen",
+ "codegen",
  "colored",
  "common-path",
+ "criterion",
  "dirs 4.0.0",
  "fern",
  "filetime",
@@ -2079,7 +2226,7 @@ dependencies = [
  "strum",
  "strum_macros",
  "test-case",
- "textwrap",
+ "textwrap 0.15.1",
  "titlecase",
  "toml",
  "update-informer",
@@ -2101,7 +2248,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.1.0"
-source = "git+https://github.com/charliermarsh/RustPython.git?rev=210db77e4274787028dc3ebc0b4841d1334c8c10#210db77e4274787028dc3ebc0b4841d1334c8c10"
+source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
 dependencies = [
  "num-bigint",
  "rustpython-common",
@@ -2111,7 +2258,7 @@ dependencies = [
 [[package]]
 name = "rustpython-common"
 version = "0.0.0"
-source = "git+https://github.com/charliermarsh/RustPython.git?rev=210db77e4274787028dc3ebc0b4841d1334c8c10#210db77e4274787028dc3ebc0b4841d1334c8c10"
+source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
 dependencies = [
  "ascii",
  "cfg-if 1.0.0",
@@ -2134,7 +2281,7 @@ dependencies = [
 [[package]]
 name = "rustpython-compiler-core"
 version = "0.1.2"
-source = "git+https://github.com/charliermarsh/RustPython.git?rev=210db77e4274787028dc3ebc0b4841d1334c8c10#210db77e4274787028dc3ebc0b4841d1334c8c10"
+source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
 dependencies = [
  "bincode",
  "bitflags",
@@ -2151,7 +2298,7 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.1.2"
-source = "git+https://github.com/charliermarsh/RustPython.git?rev=210db77e4274787028dc3ebc0b4841d1334c8c10#210db77e4274787028dc3ebc0b4841d1334c8c10"
+source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
 dependencies = [
  "ahash",
  "anyhow",
@@ -2539,6 +2686,12 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "222a222a5bfe1bba4a77b45ec488a741b3cb8872e5e499451fd7d0129c9c7c3d"
+
 [[package]]
 name = "thiserror"
 version = "1.0.37"
@@ -2579,6 +2732,16 @@ dependencies = [
  "crunchy",
 ]
 
+[[package]]
+name = "tinytemplate"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be4d6b5f19ff7664e8c98d03e2139cb510db9b0a60b55f8e8709b689d939b6bc"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "tinyvec"
 version = "1.6.0"

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ruff"
-version = "0.0.78"
+version = "0.0.93"
 edition = "2021"
 
 [lib]
@@ -26,9 +26,9 @@ once_cell = { version = "1.13.1" }
 path-absolutize = { version = "3.0.14", features = ["once_cell_cache", "use_unix_paths_on_wasm"] }
 rayon = { version = "1.5.3" }
 regex = { version = "1.6.0" }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/charliermarsh/RustPython.git", rev = "210db77e4274787028dc3ebc0b4841d1334c8c10" }
-rustpython-common = { git = "https://github.com/charliermarsh/RustPython.git", rev = "210db77e4274787028dc3ebc0b4841d1334c8c10" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/charliermarsh/RustPython.git", rev = "210db77e4274787028dc3ebc0b4841d1334c8c10" }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
 serde = { version = "1.0.143", features = ["derive"] }
 serde_json = { version = "1.0.83" }
 strum = { version = "0.24.1", features = ["strum_macros"] }
@@ -50,6 +50,8 @@ getrandom = { version = "0.2.7", features = ["js"] }
 
 [dev-dependencies]
 assert_cmd = { version = "2.0.4" }
+codegen = { version = "0.2.0" }
+criterion = { version = "0.4.0" }
 insta = { version = "1.19.1", features = ["yaml"] }
 test-case = { version = "2.2.2" }
 
@@ -68,3 +70,7 @@ opt-level = 3
 
 [profile.dev.package.similar]
 opt-level = 3
+
+[[bench]]
+name = "source_code_locator"
+harness = false

README.md

@@ -22,7 +22,7 @@ An extremely fast Python linter, written in Rust.
 - 📦 [ESLint](https://eslint.org/docs/latest/user-guide/command-line-interface#caching)-inspired cache support
 - 🔧 [ESLint](https://eslint.org/docs/latest/user-guide/command-line-interface#--fix)-inspired autofix support (e.g., automatically remove unused imports)
 - 👀 [TypeScript](https://www.typescriptlang.org/docs/handbook/configuring-watch.html)-inspired `--watch` support, for continuous file monitoring
-- ⚖️ [Near-parity](#Parity-with-Flake8) with the built-in Flake8 rule set
+- ⚖️ [Near-parity](#how-does-ruff-compare-to-flake8) with the built-in Flake8 rule set
 - 🔌 Native re-implementations of popular Flake8 plugins, like [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/) ([`pydocstyle`](https://pypi.org/project/pydocstyle/))
 
 Ruff aims to be orders of magnitude faster than alternative tools while integrating more
@@ -38,13 +38,25 @@ Read the [launch blog post](https://notes.crmarsh.com/python-tooling-could-be-mu
 1. [Installation and Usage](#installation-and-usage)
 2. [Configuration](#configuration)
 3. [Supported Rules](#supported-rules)
-4. [Editor Integrations](#editor-integrations)
-5. [FAQ](#faq)
-6. [Development](#development)
-7. [Releases](#releases)
-8. [Benchmarks](#benchmarks)
-9. [License](#license)
-10. [Contributing](#contributing)
+   1. [Pyflakes](#pyflakes)
+   2. [pycodestyle (error)](#pycodestyle-error)
+   3. [pycodestyle (warning)](#pycodestyle-warning)
+   4. [pydocstyle](#pydocstyle)
+   5. [pyupgrade](#pyupgrade)
+   6. [pep8-naming](#pep8-naming)
+   7. [flake8-comprehensions](#flake8-comprehensions)
+   8. [flake8-bugbear](#flake8-bugbear)
+   9. [flake8-builtins](#flake8-builtins)
+   10. [flake8-print](#flake8-print)
+   11. [flake8-quotes](#flake8-quotes)
+   12. [Meta rules](#meta-rules)
+5. [Editor Integrations](#editor-integrations)
+6. [FAQ](#faq)
+7. [Development](#development)
+8. [Releases](#releases)
+9. [Benchmarks](#benchmarks)
+10. [License](#license)
+11. [Contributing](#contributing)
 
 ## Installation and Usage
 
@@ -77,11 +89,14 @@ Ruff also works with [pre-commit](https://pre-commit.com):
 ```yaml
 repos:
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.78
+    rev: v0.0.93
     hooks:
-      - id: lint
+      - id: ruff
 ```
 
+<!-- TODO(charlie): Remove this message a few versions after v0.0.86. -->
+_Note: prior to `v0.0.86`, `ruff-pre-commit` used `lint` (rather than `ruff`) as the hook ID._
+
 ## Configuration
 
 Ruff is configurable both via `pyproject.toml` and the command line.
@@ -91,13 +106,25 @@ For example, you could configure Ruff to only enforce a subset of rules with:
 ```toml
 [tool.ruff]
 line-length = 88
-select = [
-    "F401",
-    "F403",
+select = ["E", "F"]
+ignore = ["E501"]
+per-file-ignores = [
+    "__init__.py:F401",
+    "path/to/file.py:F401"
 ]
 ```
 
-Alternatively, on the command-line:
+Plugin configurations should be expressed as subsections, e.g.:
+
+```toml
+[tool.ruff]
+line-length = 88
+
+[tool.ruff.flake8-quotes]
+docstring-quotes = "double"
+```
+
+Alternatively, common configuration settings can be provided via the command-line:
 
 ```shell
 ruff path/to/code/ --select F401 --select F403
@@ -219,8 +246,7 @@ add `noqa` directives to all failing lines, with the appropriate error codes.**
 
 ## Supported Rules
 
-By default, Ruff enables all `E`, `W`, and `F` error codes, which correspond to those built-in to
-Flake8.
+By default, Ruff enables all `E` and `F` error codes, which correspond to those built-in to Flake8.
 
 The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` command-line option.
 
@@ -246,7 +272,7 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | F634 | IfTuple | If test is a tuple, which is always `True` |  |
 | F701 | BreakOutsideLoop | `break` outside loop |  |
 | F702 | ContinueOutsideLoop | `continue` not properly in loop |  |
-| F704 | YieldOutsideFunction | `yield` or `yield from` statement outside of a function/method |  |
+| F704 | YieldOutsideFunction | `yield` or `yield from` statement outside of a function |  |
 | F706 | ReturnOutsideFunction | `return` statement outside of a function/method |  |
 | F707 | DefaultExceptNotLast | An `except:` block as not the last exception handler |  |
 | F722 | ForwardAnnotationSyntaxError | Syntax error in forward annotation: `...` |  |
@@ -257,7 +283,7 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | F841 | UnusedVariable | Local variable `...` is assigned to but never used |  |
 | F901 | RaiseNotImplemented | `raise NotImplemented` should be `raise NotImplementedError` |  |
 
-### pycodestyle
+### pycodestyle (error)
 
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
@@ -275,7 +301,13 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | E743 | AmbiguousFunctionName | Ambiguous function name: `...` |  |
 | E902 | IOError | IOError: `...` |  |
 | E999 | SyntaxError | SyntaxError: `...` |  |
+
+### pycodestyle (warning)
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
 | W292 | NoNewLineAtEndOfFile | No newline at end of file |  |
+| W605 | InvalidEscapeSequence | Invalid escape sequence: '\c' |  |
 
 ### pydocstyle
 
@@ -294,36 +326,36 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | D202 | NoBlankLineAfterFunction | No blank lines allowed after function docstring (found 1) | 🛠 |
 | D203 | OneBlankLineBeforeClass | 1 blank line required before class docstring | 🛠 |
 | D204 | OneBlankLineAfterClass | 1 blank line required after class docstring | 🛠 |
-| D205 | NoBlankLineAfterSummary | 1 blank line required between summary line and description | 🛠 |
+| D205 | BlankLineAfterSummary | 1 blank line required between summary line and description | 🛠 |
 | D206 | IndentWithSpaces | Docstring should be indented with spaces, not tabs |  |
-| D207 | NoUnderIndentation | Docstring is under-indented |  |
-| D208 | NoOverIndentation | Docstring is over-indented |  |
+| D207 | NoUnderIndentation | Docstring is under-indented | 🛠 |
+| D208 | NoOverIndentation | Docstring is over-indented | 🛠 |
 | D209 | NewLineAfterLastParagraph | Multi-line docstring closing quotes should be on a separate line | 🛠 |
 | D210 | NoSurroundingWhitespace | No whitespaces allowed surrounding docstring text | 🛠 |
 | D211 | NoBlankLineBeforeClass | No blank lines allowed before class docstring | 🛠 |
 | D212 | MultiLineSummaryFirstLine | Multi-line docstring summary should start at the first line |  |
 | D213 | MultiLineSummarySecondLine | Multi-line docstring summary should start at the second line |  |
-| D214 | SectionNotOverIndented | Section is over-indented ("Returns") |  |
-| D215 | SectionUnderlineNotOverIndented | Section underline is over-indented ("Returns") |  |
+| D214 | SectionNotOverIndented | Section is over-indented ("Returns") | 🛠 |
+| D215 | SectionUnderlineNotOverIndented | Section underline is over-indented ("Returns") | 🛠 |
 | D300 | UsesTripleQuotes | Use """triple double quotes""" |  |
 | D400 | EndsInPeriod | First line should end with a period |  |
-| D402 | NoSignature | First line should not be the function's 'signature' |  |
+| D402 | NoSignature | First line should not be the function's signature |  |
 | D403 | FirstLineCapitalized | First word of the first line should be properly capitalized |  |
-| D404 | NoThisPrefix | First word of the docstring should not be `This` |  |
-| D405 | CapitalizeSectionName | Section name should be properly capitalized ("returns") |  |
-| D406 | NewLineAfterSectionName | Section name should end with a newline ("Returns") |  |
-| D407 | DashedUnderlineAfterSection | Missing dashed underline after section ("Returns") |  |
-| D408 | SectionUnderlineAfterName | Section underline should be in the line following the section's name ("Returns") |  |
-| D409 | SectionUnderlineMatchesSectionLength | Section underline should match the length of its name ("Returns") |  |
+| D404 | NoThisPrefix | First word of the docstring should not be 'This' |  |
+| D405 | CapitalizeSectionName | Section name should be properly capitalized ("returns") | 🛠 |
+| D406 | NewLineAfterSectionName | Section name should end with a newline ("Returns") | 🛠 |
+| D407 | DashedUnderlineAfterSection | Missing dashed underline after section ("Returns") | 🛠 |
+| D408 | SectionUnderlineAfterName | Section underline should be in the line following the section's name ("Returns") | 🛠 |
+| D409 | SectionUnderlineMatchesSectionLength | Section underline should match the length of its name ("Returns") | 🛠 |
 | D410 | BlankLineAfterSection | Missing blank line after section ("Returns") | 🛠 |
-| D411 | BlankLineBeforeSection | Missing blank line before section ("Returns") |  |
-| D412 | NoBlankLinesBetweenHeaderAndContent | No blank lines allowed between a section header and its content ("Returns") |  |
+| D411 | BlankLineBeforeSection | Missing blank line before section ("Returns") | 🛠 |
+| D412 | NoBlankLinesBetweenHeaderAndContent | No blank lines allowed between a section header and its content ("Returns") | 🛠 |
 | D413 | BlankLineAfterLastSection | Missing blank line after last section ("Returns") | 🛠 |
 | D414 | NonEmptySection | Section has no content ("Returns") |  |
 | D415 | EndsInPunctuation | First line should end with a period, question mark, or exclamation point |  |
-| D416 | SectionNameEndsInColon | Section name should end with a colon ("Returns") |  |
+| D416 | SectionNameEndsInColon | Section name should end with a colon ("Returns") | 🛠 |
 | D417 | DocumentAllArguments | Missing argument descriptions in the docstring: `x`, `y` |  |
-| D418 | SkipDocstring | Function decorated with @overload shouldn't contain a docstring |  |
+| D418 | SkipDocstring | Function decorated with `@overload` shouldn't contain a docstring |  |
 | D419 | NonEmpty | Docstring is empty |  |
 
 ### pyupgrade
@@ -348,6 +380,16 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | N803 | InvalidArgumentName | Argument name `...` should be lowercase |  |
 | N804 | InvalidFirstArgumentNameForClassMethod | First argument of a class method should be named `cls` |  |
 | N805 | InvalidFirstArgumentNameForMethod | First argument of a method should be named `self` |  |
+| N806 | NonLowercaseVariableInFunction | Variable `...` in function should be lowercase |  |
+| N807 | DunderFunctionName | Function name should not start and end with `__` |  |
+| N811 | ConstantImportedAsNonConstant | Constant `...` imported as non-constant `...` |  |
+| N812 | LowercaseImportedAsNonLowercase | Lowercase `...` imported as non-lowercase `...` |  |
+| N813 | CamelcaseImportedAsLowercase | Camelcase `...` imported as lowercase `...` |  |
+| N814 | CamelcaseImportedAsConstant | Camelcase `...` imported as constant `...` |  |
+| N815 | MixedCaseVariableInClassScope | Variable `mixedCase` in class scope should not be mixedCase |  |
+| N816 | MixedCaseVariableInGlobalScope | Variable `mixedCase` in global scope should not be mixedCase |  |
+| N817 | CamelcaseImportedAsAcronym | Camelcase `...` imported as acronym `...` |  |
+| N818 | ErrorSuffixOnExceptionName | Exception name `...` should be named with an Error suffix |  |
 
 ### flake8-comprehensions
 
@@ -367,15 +409,20 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | C413 | UnnecessaryCallAroundSorted | Unnecessary `(list\|reversed)` call around `sorted()` |  |
 | C414 | UnnecessaryDoubleCastOrProcess | Unnecessary `(list\|reversed\|set\|sorted\|tuple)` call within `(list\|set\|sorted\|tuple)()` |  |
 | C415 | UnnecessarySubscriptReversal | Unnecessary subscript reversal of iterable within `(reversed\|set\|sorted)()` |  |
-| C416 | UnnecessaryComprehension |  Unnecessary `(list\|set)` comprehension (rewrite using `(list\|set)()`) |  |
+| C416 | UnnecessaryComprehension | Unnecessary `(list\|set)` comprehension (rewrite using `(list\|set)()`) |  |
 | C417 | UnnecessaryMap | Unnecessary `map` usage (rewrite using a `(list\|set\|dict)` comprehension) |  |
 
 ### flake8-bugbear
 
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
+| B002 | UnaryPrefixIncrement | Python does not support the unary prefix increment. |  |
+| B006 | MutableArgumentDefault | Do not use mutable data structures for argument defaults. |  |
+| B007 | UnusedLoopControlVariable | Loop control variable `i` not used within the loop body. | 🛠 |
 | B011 | DoNotAssertFalse | Do not `assert False` (`python -O` removes these calls), raise `AssertionError()` | 🛠 |
+| B013 | RedundantTupleInExceptionHandler | A length-one tuple literal is redundant. Write `except ValueError:` instead of `except (ValueError,):`. |  |
 | B014 | DuplicateHandlerException | Exception handler with duplicate exception: `ValueError` | 🛠 |
+| B017 | NoAssertRaisesException | `assertRaises(Exception):` should be considered evil. |  |
 | B025 | DuplicateTryBlockException | try-except block with duplicate exception `Exception` |  |
 
 ### flake8-builtins
@@ -393,6 +440,15 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | T201 | PrintFound | `print` found | 🛠 |
 | T203 | PPrintFound | `pprint` found | 🛠 |
 
+### flake8-quotes
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| Q000 | BadQuotesInlineString | Single quotes found but double quotes preferred |  |
+| Q001 | BadQuotesMultilineString | Single quote multiline found but double quotes preferred |  |
+| Q002 | BadQuotesDocstring | Single quote docstring found but double quotes preferred |  |
+| Q003 | AvoidQuoteEscape | Change outer quotes to avoid escaping inner quotes |  |
+
 ### Meta rules
 
 | Code | Name | Message | Fix |
@@ -459,13 +515,15 @@ Ruff re-implements some of the most popular Flake8 plugins and related code qual
 including:
 
 - [`pydocstyle`](https://pypi.org/project/pydocstyle/)
+- [`pep8-naming`](https://pypi.org/project/pep8-naming/)
 - [`yesqa`](https://github.com/asottile/yesqa)
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-builtins`](https://pypi.org/project/flake8-builtins/)
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
+- [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
 - [`flake8-comprehensions`](https://pypi.org/project/flake8-comprehensions/)
-- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (3/32)
+- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (10/32)
 - [`pyupgrade`](https://pypi.org/project/pyupgrade/) (8/34)
 - [`autoflake`](https://pypi.org/project/autoflake/) (1/7)
 
@@ -480,12 +538,14 @@ Beyond rule-set parity, Ruff suffers from the following limitations vis-à-vis F
 
 Today, Ruff can be used to replace Flake8 when used with any of the following plugins:
 
+- [`pep8-naming`](https://pypi.org/project/pep8-naming/)
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-builtins`](https://pypi.org/project/flake8-builtins/)
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
+- [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
 - [`flake8-comprehensions`](https://pypi.org/project/flake8-comprehensions/)
-- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (3/32)
+- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (10/32)
 
 Ruff also implements the functionality that you get from [`yesqa`](https://github.com/asottile/yesqa),
 and a subset of the rules implemented in [`pyupgrade`](https://pypi.org/project/pyupgrade/) (8/34).
@@ -506,7 +566,7 @@ on Rust at all.
 ### Can I write my own plugins for Ruff?
 
 Ruff does not yet support third-party plugins, though a plugin system is within-scope for the
-project. See [#283](https://github.com/charliermarsh/ruff/issues/2830) for more.
+project. See [#283](https://github.com/charliermarsh/ruff/issues/283) for more.
 
 ### Does Ruff support NumPy- or Google-style docstrings?
 
@@ -514,35 +574,55 @@ Yes! To enable a specific docstring convention, start by enabling all `pydocstyl
 then selectively disabling based on your [preferred convention](https://www.pydocstyle.org/en/latest/error_codes.html#default-conventions).
 
 For example, if you're coming from `flake8-docstrings`, the following configuration is equivalent to
-`--docstring-convention numpy`:
+`--docstring-convention=numpy`:
 
 ```toml
 [tool.ruff]
-extend-select = [
-    "D100",
-    "D101",
-    "D102",
-    "D103",
-    "D104",
-    "D105",
-    "D106",
-    "D200",
-    "D201",
-    "D202",
+extend-select = ["D"]
+extend-ignore = [
+    "D107",
+    "D203",
+    "D212",
+    "D213",
+    "D402",
+    "D413",
+    "D415",
+    "D416",
+    "D417",
+]
+```
+
+Similarly, the following is equivalent to `--docstring-convention=google`:
+
+```toml
+[tool.ruff]
+extend-select = ["D"]
+extend-ignore = [
+    "D203",
     "D204",
-    "D205",
-    "D206",
-    "D207",
-    "D208",
-    "D209",
-    "D210",
-    "D211",
+    "D213",
+    "D215",
+    "D400",
+    "D404",
+    "D406",
+    "D407",
+    "D408",
+    "D409",
+    "D413",
+]
+```
+
+Similarly, the following is equivalent to `--docstring-convention=pep8`:
+
+```toml
+[tool.ruff]
+extend-select = ["D"]
+extend-ignore = [
+    "D203",
+    "D212",
+    "D213",
     "D214",
     "D215",
-    "D300",
-    "D400",
-    "D402",
-    "D403",
     "D404",
     "D405",
     "D406",
@@ -551,51 +631,10 @@ extend-select = [
     "D409",
     "D410",
     "D411",
-    "D412",
     "D413",
-    "D418",
-    "D419",
-]
-```
-
-Similarly, the following is equivalent to `--docstring-convention google`:
-
-```toml
-[tool.ruff]
-extend-select = [
-    "D100",
-    "D101",
-    "D102",
-    "D103",
-    "D104",
-    "D105",
-    "D106",
-    "D107",
-    "D200",
-    "D201",
-    "D202",
-    "D205",
-    "D206",
-    "D207",
-    "D208",
-    "D209",
-    "D210",
-    "D211",
-    "D212",
-    "D214",
-    "D300",
-    "D402",
-    "D403",
-    "D405",
-    "D410",
-    "D411",
-    "D412",
-    "D414",
     "D415",
     "D416",
     "D417",
-    "D418",
-    "D419",
 ]
 ```
 

benches/source_code_locator.rs

@@ -0,0 +1,16 @@
+use std::path::Path;
+
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+
+use ruff::fs;
+use ruff::source_code_locator::compute_offsets;
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let contents = fs::read_file(Path::new("resources/test/fixtures/D.py")).unwrap();
+    c.bench_function("compute_offsets", |b| {
+        b.iter(|| compute_offsets(black_box(&contents)))
+    });
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);

examples/generate_check_code_prefix.rs

@@ -0,0 +1,105 @@
+//! Generate the CheckCodePrefix enum.
+
+use std::collections::{BTreeMap, BTreeSet};
+
+use codegen::{Scope, Type, Variant};
+use itertools::Itertools;
+use strum::IntoEnumIterator;
+
+use ruff::checks::CheckCode;
+
+fn main() {
+    // Build up a map from prefix to matching CheckCodes.
+    let mut prefix_to_codes: BTreeMap<String, BTreeSet<CheckCode>> = Default::default();
+    for check_code in CheckCode::iter() {
+        let as_ref = check_code.as_ref().to_string();
+        for i in 1..=as_ref.len() {
+            let prefix = as_ref[..i].to_string();
+            let entry = prefix_to_codes
+                .entry(prefix)
+                .or_insert_with(|| Default::default());
+            entry.insert(check_code.clone());
+        }
+    }
+
+    let mut scope = Scope::new();
+
+    // Create the `CheckCodePrefix` definition.
+    let mut gen = scope
+        .new_enum("CheckCodePrefix")
+        .vis("pub")
+        .derive("EnumString")
+        .derive("Debug")
+        .derive("PartialEq")
+        .derive("Eq")
+        .derive("Clone")
+        .derive("Serialize")
+        .derive("Deserialize");
+    for (prefix, _) in &prefix_to_codes {
+        gen = gen.push_variant(Variant::new(prefix.to_string()));
+    }
+
+    // Create the `PrefixSpecificity` definition.
+    scope
+        .new_enum("PrefixSpecificity")
+        .vis("pub")
+        .derive("PartialEq")
+        .derive("Eq")
+        .derive("PartialOrd")
+        .derive("Ord")
+        .push_variant(Variant::new("Category"))
+        .push_variant(Variant::new("Hundreds"))
+        .push_variant(Variant::new("Tens"))
+        .push_variant(Variant::new("Explicit"));
+
+    // Create the `match` statement, to map from definition to relevant codes.
+    let mut gen = scope
+        .new_impl("CheckCodePrefix")
+        .new_fn("codes")
+        .arg_ref_self()
+        .ret(Type::new("Vec<CheckCode>"))
+        .vis("pub")
+        .line("match self {");
+    for (prefix, codes) in &prefix_to_codes {
+        gen = gen.line(format!(
+            "CheckCodePrefix::{prefix} => vec![{}],",
+            codes
+                .iter()
+                .map(|code| format!("CheckCode::{}", code.as_ref()))
+                .join(", ")
+        ));
+    }
+    gen.line("}");
+
+    // Create the `match` statement, to map from definition to specificity.
+    let mut gen = scope
+        .new_impl("CheckCodePrefix")
+        .new_fn("specificity")
+        .arg_ref_self()
+        .ret(Type::new("PrefixSpecificity"))
+        .vis("pub")
+        .line("match self {");
+    for (prefix, _) in &prefix_to_codes {
+        let specificity = match prefix.len() {
+            4 => "Explicit",
+            3 => "Tens",
+            2 => "Hundreds",
+            1 => "Category",
+            _ => panic!("Invalid prefix: {}", prefix),
+        };
+        gen = gen.line(format!(
+            "CheckCodePrefix::{prefix} => PrefixSpecificity::{},",
+            specificity
+        ));
+    }
+    gen.line("}");
+
+    println!("//! File automatically generated by examples/generate_check_code_prefix.rs.");
+    println!();
+    println!("use serde::{{Deserialize, Serialize}};");
+    println!("use strum_macros::EnumString;");
+    println!();
+    println!("use crate::checks::CheckCode;");
+    println!();
+    println!("{}", scope.to_string());
+}

examples/generate_rules_table.rs

@@ -19,7 +19,7 @@ fn main() {
                     "| {} | {} | {} | {} |",
                     check_kind.code().as_ref(),
                     check_kind.as_ref(),
-                    check_kind.body().replace("|", r"\|"),
+                    check_kind.summary().replace("|", r"\|"),
                     fix_token
                 );
             }

resources/test/fixtures/B002.py

@@ -0,0 +1,20 @@
+"""
+Should emit:
+B002 - on lines 15 and 20
+"""
+
+
+def this_is_all_fine(n):
+    x = n + 1
+    y = 1 + n
+    z = +x + y
+    return +z
+
+
+def this_is_buggy(n):
+    x = ++n
+    return x
+
+
+def this_is_buggy_too(n):
+    return ++n

resources/test/fixtures/B006_B008.py

@@ -0,0 +1,187 @@
+import collections
+import datetime as dt
+import logging
+import operator
+import random
+import re
+import time
+import types
+from operator import attrgetter, itemgetter, methodcaller
+from types import MappingProxyType
+
+
+# B006
+# Allow immutable literals/calls/comprehensions
+def this_is_okay(value=(1, 2, 3)):
+    ...
+
+
+async def and_this_also(value=tuple()):
+    pass
+
+
+def frozenset_also_okay(value=frozenset()):
+    pass
+
+
+def mappingproxytype_okay(
+    value=MappingProxyType({}), value2=types.MappingProxyType({})
+):
+    pass
+
+
+def re_compile_ok(value=re.compile("foo")):
+    pass
+
+
+def operators_ok(
+    v=operator.attrgetter("foo"),
+    v2=operator.itemgetter("foo"),
+    v3=operator.methodcaller("foo"),
+):
+    pass
+
+
+def operators_ok_unqualified(
+    v=attrgetter("foo"),
+    v2=itemgetter("foo"),
+    v3=methodcaller("foo"),
+):
+    pass
+
+
+def kwonlyargs_immutable(*, value=()):
+    ...
+
+
+# Flag mutable literals/comprehensions
+
+
+def this_is_wrong(value=[1, 2, 3]):
+    ...
+
+
+def this_is_also_wrong(value={}):
+    ...
+
+
+def and_this(value=set()):
+    ...
+
+
+def this_too(value=collections.OrderedDict()):
+    ...
+
+
+async def async_this_too(value=collections.defaultdict()):
+    ...
+
+
+def dont_forget_me(value=collections.deque()):
+    ...
+
+
+# N.B. we're also flagging the function call in the comprehension
+def list_comprehension_also_not_okay(default=[i**2 for i in range(3)]):
+    pass
+
+
+def dict_comprehension_also_not_okay(default={i: i**2 for i in range(3)}):
+    pass
+
+
+def set_comprehension_also_not_okay(default={i**2 for i in range(3)}):
+    pass
+
+
+def kwonlyargs_mutable(*, value=[]):
+    ...
+
+
+# Recommended approach for mutable defaults
+def do_this_instead(value=None):
+    if value is None:
+        value = set()
+
+
+# B008
+# Flag function calls as default args (including if they are part of a sub-expression)
+def in_fact_all_calls_are_wrong(value=time.time()):
+    ...
+
+
+def f(when=dt.datetime.now() + dt.timedelta(days=7)):
+    pass
+
+
+def can_even_catch_lambdas(a=(lambda x: x)()):
+    ...
+
+
+# Recommended approach for function calls as default args
+LOGGER = logging.getLogger(__name__)
+
+
+def do_this_instead_of_calls_in_defaults(logger=LOGGER):
+    # That makes it more obvious that this one value is reused.
+    ...
+
+
+# Handle inf/infinity/nan special case
+def float_inf_okay(value=float("inf")):
+    pass
+
+
+def float_infinity_okay(value=float("infinity")):
+    pass
+
+
+def float_plus_infinity_okay(value=float("+infinity")):
+    pass
+
+
+def float_minus_inf_okay(value=float("-inf")):
+    pass
+
+
+def float_nan_okay(value=float("nan")):
+    pass
+
+
+def float_minus_NaN_okay(value=float("-NaN")):
+    pass
+
+
+def float_infinity_literal(value=float("1e999")):
+    pass
+
+
+# But don't allow standard floats
+def float_int_is_wrong(value=float(3)):
+    pass
+
+
+def float_str_not_inf_or_nan_is_wrong(value=float("3.14")):
+    pass
+
+
+# B006 and B008
+# We should handle arbitrary nesting of these B008.
+def nested_combo(a=[float(3), dt.datetime.now()]):
+    pass
+
+
+# Don't flag nested B006 since we can't guarantee that
+# it isn't made mutable by the outer operation.
+def no_nested_b006(a=map(lambda s: s.upper(), ["a", "b", "c"])):
+    pass
+
+
+# B008-ception.
+def nested_b008(a=random.randint(0, dt.datetime.now().year)):
+    pass
+
+
+# Ignore lambda contents since they are evaluated at call time.
+def foo(f=lambda x: print(x)):
+    f(1)

resources/test/fixtures/B007.py

@@ -0,0 +1,31 @@
+for i in range(10):
+    print(i)
+
+print(i)  # name no longer defined on Python 3; no warning yet
+
+for i in range(10):  # name not used within the loop; B007
+    print(10)
+
+print(i)  # name no longer defined on Python 3; no warning yet
+
+
+for _ in range(10):  # _ is okay for a throw-away variable
+    print(10)
+
+
+for i in range(10):
+    for j in range(10):
+        for k in range(10):  # k not used, i and j used transitively
+            print(i + j)
+
+
+def strange_generator():
+    for i in range(10):
+        for j in range(10):
+            for k in range(10):
+                for l in range(10):
+                    yield i, (j, (k, l))
+
+
+for i, (j, (k, l)) in strange_generator():  # i, k not used
+    print(j, l)

resources/test/fixtures/B013.py

@@ -0,0 +1,8 @@
+try:
+    pass
+except (ValueError,):
+    pass
+except AttributeError:
+    pass
+except (ImportError, TypeError):
+    pass

resources/test/fixtures/B017.py

@@ -0,0 +1,36 @@
+"""
+Should emit:
+B017 - on lines 20
+"""
+import asyncio
+import unittest
+
+CONSTANT = True
+
+
+def something_else() -> None:
+    for i in (1, 2, 3):
+        print(i)
+
+
+class Foo:
+    pass
+
+
+class Foobar(unittest.TestCase):
+    def evil_raises(self) -> None:
+        with self.assertRaises(Exception):
+            raise Exception("Evil I say!")
+
+    def context_manager_raises(self) -> None:
+        with self.assertRaises(Exception) as ex:
+            raise Exception("Context manager is good")
+        self.assertEqual("Context manager is good", str(ex.exception))
+
+    def regex_raises(self) -> None:
+        with self.assertRaisesRegex(Exception, "Regex is good"):
+            raise Exception("Regex is good")
+
+    def raises_with_absolute_reference(self):
+        with self.assertRaises(asyncio.CancelledError):
+            Foo()

resources/test/fixtures/C402.py

@@ -1 +1,2 @@
-d = dict((x, x) for x in range(3))
+dict((x, x) for x in range(3))
+dict(((x, x) for x in range(3)), z=3)

resources/test/fixtures/C404.py

@@ -1 +1,2 @@
-d = dict([(i, i) for i in range(3)])
+dict([(i, i) for i in range(3)])
+dict([(i, i) for i in range(3)], z=4)

resources/test/fixtures/F401_5.py

@@ -0,0 +1,5 @@
+"""Test: removal of multi-segment and aliases imports."""
+from a.b import c
+from d.e import f as g
+import h.i
+import j.k as l

resources/test/fixtures/N802.py

@@ -1,3 +1,6 @@
+import unittest
+
+
 def Bad():
     pass
 
@@ -24,3 +27,15 @@ def _good():
 
 def good_func():
     pass
+
+
+def tearDownModule():
+    pass
+
+
+class Test(unittest.TestCase):
+    def tearDown(self):
+        return super().tearDown()
+
+    def testTest(self):
+        assert True

resources/test/fixtures/N806.py

@@ -0,0 +1,4 @@
+def f():
+    lower = 0
+    Camel = 0
+    CONSTANT = 0

resources/test/fixtures/N807.py

@@ -0,0 +1,15 @@
+def __bad__():
+    pass
+
+
+def __good():
+    pass
+
+
+def good__():
+    pass
+
+
+class Class:
+    def __good__(self):
+        pass

resources/test/fixtures/N811.py

@@ -0,0 +1,3 @@
+import mod.CONST as const
+from mod import CONSTANT as constant
+from mod import ANOTHER_CONSTANT as another_constant

resources/test/fixtures/N812.py

@@ -0,0 +1,3 @@
+import modl.lowercase as Lower
+from mod import lowercase as Lowercase
+from mod import another_lowercase as AnotherLowercase

resources/test/fixtures/N813.py

@@ -0,0 +1,3 @@
+import mod.Camel as camel
+from mod import CamelCase as camelcase
+from mod import AnotherCamelCase as another_camelcase

resources/test/fixtures/N814.py

@@ -0,0 +1,3 @@
+import mod.Camel as CAMEL
+from mod import CamelCase as CAMELCASE
+from mod import AnotherCamelCase as ANOTHER_CAMELCASE

resources/test/fixtures/N815.py

@@ -0,0 +1,6 @@
+class C:
+    lower = 0
+    CONSTANT = 0
+    mixedCase = 0
+    _mixedCase = 0
+    mixed_Case = 0

resources/test/fixtures/N816.py

@@ -0,0 +1,5 @@
+lower = 0
+CONSTANT = 0
+mixedCase = 0
+_mixedCase = 0
+mixed_Case = 0

resources/test/fixtures/N817.py

@@ -0,0 +1,2 @@
+import mod.CaMel as CM
+from mod import CamelCase as CC

resources/test/fixtures/N818.py

@@ -0,0 +1,10 @@
+class Error(Exception):
+    pass
+
+
+class AnotherError(Exception):
+    pass
+
+
+class C(Exception):
+    pass

resources/test/fixtures/W605.py

@@ -0,0 +1,35 @@
+#: W605:1:10
+regex = '\.png$'
+
+#: W605:2:1
+regex = '''
+\.png$
+'''
+
+#: W605:2:6
+f(
+    '\_'
+)
+
+#: W605:4:6
+"""
+multi-line
+literal
+with \_ somewhere
+in the middle
+"""
+
+#: Okay
+regex = r'\.png$'
+regex = '\\.png$'
+regex = r'''
+\.png$
+'''
+regex = r'''
+\\.png$
+'''
+s = '\\'
+regex = '\w'  # noqa
+regex = '''
+\w
+'''  # noqa

resources/test/fixtures/__init__.py

@@ -1,3 +1,5 @@
+import os
+
 print(__path__)
 
 __all__ = ["a", "b", "c"]

resources/test/fixtures/flake8_quotes/docstring_doubles.py

@@ -0,0 +1,38 @@
+"""
+Double quotes multiline module docstring
+"""
+
+"""
+this is not a docstring
+"""
+
+l = []
+
+class Cls:
+    """
+    Double quotes multiline class docstring
+    """
+
+    """
+    this is not a docstring
+    """
+
+    # The colon in the list indexing below is an edge case for the docstring scanner
+    def f(self, bar="""
+        definitely not a docstring""",
+        val=l[Cls():3]):
+        """
+        Double quotes multiline function docstring
+        """
+
+        some_expression = 'hello world'
+
+        """
+        this is not a docstring
+        """
+
+        if l:
+            """
+            Looks like a docstring, but in reality it isn't - only modules, classes and functions
+            """
+            pass

resources/test/fixtures/flake8_quotes/docstring_doubles_class.py

@@ -0,0 +1,9 @@
+class SingleLineDocstrings():
+    """ Double quotes single line class docstring """
+    """ Not a docstring """
+
+    def foo(self, bar="""not a docstring"""):
+        """ Double quotes single line method docstring"""
+        pass
+
+    class Nested(foo()[:]): """ inline docstring """; pass

resources/test/fixtures/flake8_quotes/docstring_doubles_function.py

@@ -0,0 +1,22 @@
+def foo():
+    """function without params, single line docstring"""
+    """ not a docstring"""
+    return
+
+
+def foo2():
+    """
+        function without params, multiline docstring
+    """
+    """ not a docstring"""
+    return
+
+
+def fun_with_params_no_docstring(a, b="""
+    not a
+""" """docstring"""):
+    pass
+
+def fun_with_params_no_docstring2(a, b=c[foo():], c=\
+    """ not a docstring """):
+    pass

resources/test/fixtures/flake8_quotes/docstring_doubles_module_multiline.py

@@ -0,0 +1,11 @@
+"""
+Double quotes multiline module docstring
+"""
+"""
+this is not a docstring
+"""
+def foo():
+    pass
+"""
+this is not a docstring
+"""

resources/test/fixtures/flake8_quotes/docstring_doubles_module_singleline.py

@@ -0,0 +1,6 @@
+""" Double quotes singleline module docstring """
+""" this is not a docstring """
+
+def foo():
+    pass
+""" this is not a docstring """

resources/test/fixtures/flake8_quotes/docstring_singles.py

@@ -0,0 +1,40 @@
+'''
+Single quotes multiline module docstring
+'''
+
+'''
+this is not a docstring
+'''
+
+l = []
+
+class Cls(MakeKlass('''
+    class params \t not a docstring
+''')):
+    '''
+    Single quotes multiline class docstring
+    '''
+
+    '''
+    this is not a docstring
+    '''
+
+    # The colon in the list indexing below is an edge case for the docstring scanner
+    def f(self, bar='''
+        definitely not a docstring''',
+        val=l[Cls():3]):
+        '''
+        Single quotes multiline function docstring
+        '''
+
+        some_expression = 'hello world'
+
+        '''
+        this is not a docstring
+        '''
+
+        if l:
+            '''
+            Looks like a docstring, but in reality it isn't - only modules, classes and functions
+            '''
+            pass

resources/test/fixtures/flake8_quotes/docstring_singles_class.py

@@ -0,0 +1,9 @@
+class SingleLineDocstrings():
+    ''' Double quotes single line class docstring '''
+    ''' Not a docstring '''
+
+    def foo(self, bar='''not a docstring'''):
+        ''' Double quotes single line method docstring'''
+        pass
+
+    class Nested(foo()[:]): ''' inline docstring '''; pass

resources/test/fixtures/flake8_quotes/docstring_singles_function.py

@@ -0,0 +1,23 @@
+def foo():
+    '''function without params, single line docstring'''
+    ''' not a docstring'''
+    return
+
+
+def foo2():
+    '''
+        function without params, multiline docstring
+    '''
+    ''' not a docstring'''
+    return
+
+
+def fun_with_params_no_docstring(a, b='''
+    not a 
+''' '''docstring'''):
+    pass
+
+def fun_with_params_no_docstring2(a, b=c[foo():], c=\
+    ''' not a docstring '''):
+    pass
+

resources/test/fixtures/flake8_quotes/docstring_singles_module_multiline.py

@@ -0,0 +1,11 @@
+'''
+Double quotes multiline module docstring
+'''
+'''
+this is not a docstring
+'''
+def foo():
+    pass
+'''
+this is not a docstring
+'''

resources/test/fixtures/flake8_quotes/docstring_singles_module_singleline.py

@@ -0,0 +1,6 @@
+''' Double quotes singleline module docstring '''
+''' this is not a docstring '''
+
+def foo():
+    pass
+''' this is not a docstring '''

resources/test/fixtures/flake8_quotes/doubles.py

@@ -0,0 +1,2 @@
+this_should_be_linted = "double quote string"
+this_should_be_linted = u"double quote string"

resources/test/fixtures/flake8_quotes/doubles_escaped.py

@@ -0,0 +1,5 @@
+this_should_raise_Q003 = 'This is a \'string\''
+this_is_fine = '"This" is a \'string\''
+this_is_fine = "This is a 'string'"
+this_is_fine = "\"This\" is a 'string'"
+this_is_fine = r'This is a \'string\''

resources/test/fixtures/flake8_quotes/doubles_multiline_string.py

@@ -0,0 +1,9 @@
+s = """ This "should"
+be
+"linted" """
+
+s = ''' This "should"
+"not" be
+"linted" '''
+
+s = """'This should not be linted due to having would-be quadruple end quote'"""

resources/test/fixtures/flake8_quotes/doubles_noqa.py

@@ -0,0 +1 @@
+this_should_not_be_linted = "double quote string"  # noqa

resources/test/fixtures/flake8_quotes/doubles_wrapped.py

@@ -0,0 +1,2 @@
+s = 'double "quotes" wrapped in singles are ignored'
+s = "single 'quotes' wrapped in doubles are ignored"

resources/test/fixtures/flake8_quotes/singles.py

@@ -0,0 +1,2 @@
+this_should_be_linted = 'single quote string'
+this_should_be_linted = u'double quote string'

resources/test/fixtures/flake8_quotes/singles_escaped.py

@@ -0,0 +1,5 @@
+this_should_raise_Q003 = "This is a \"string\""
+this_is_fine = "'This' is a \"string\""
+this_is_fine = 'This is a "string"'
+this_is_fine = '\'This\' is a "string"'
+this_is_fine = r"This is a \"string\""

resources/test/fixtures/flake8_quotes/singles_multiline_string.py

@@ -0,0 +1,9 @@
+s = ''' This 'should'
+be
+'linted' '''
+
+s = """ This 'should'
+'not' be
+'linted' """
+
+s = '''"This should not be linted due to having would-be quadruple end quote"'''

resources/test/fixtures/flake8_quotes/singles_noqa.py

@@ -0,0 +1 @@
+this_should_not_be_linted = 'single quote string'  # noqa

resources/test/fixtures/flake8_quotes/singles_wrapped.py

@@ -0,0 +1,2 @@
+s = "single 'quotes' wrapped in doubles are ignored"
+s = 'double "quotes" wrapped in singles are ignored'

resources/test/fixtures/pyproject.toml

@@ -5,3 +5,34 @@ extend-exclude = [
     "migrations",
     "directory/also_excluded.py",
 ]
+per-file-ignores = [
+    "__init__.py:F401",
+]
+
+[tool.ruff.flake8-quotes]
+inline-quotes = "single"
+multiline-quotes = "double"
+docstring-quotes = "double"
+avoid-escape = true
+
+[tool.ruff.pep8-naming]
+ignore-names = [
+    "setUp",
+    "tearDown",
+    "setUpClass",
+    "tearDownClass",
+    "setUpModule",
+    "tearDownModule",
+    "asyncSetUp",
+    "asyncTearDown",
+    "setUpTestData",
+    "failureException",
+    "longMessage",
+    "maxDiff",
+]
+classmethod-decorators = [
+    "classmethod",
+]
+staticmethod-decorators = [
+    "staticmethod",
+]

src/ast/helpers.rs

@@ -1,6 +1,6 @@
 use once_cell::sync::Lazy;
 use regex::Regex;
-use rustpython_ast::{Excepthandler, ExcepthandlerKind, Expr, ExprKind, StmtKind};
+use rustpython_ast::{Excepthandler, ExcepthandlerKind, Expr, ExprKind, Location, StmtKind};
 
 use crate::python::typing;
 
@@ -131,3 +131,15 @@ pub fn is_super_call_with_arguments(func: &Expr, args: &[Expr]) -> bool {
         false
     }
 }
+
+/// Convert a location within a file (relative to `base`) to an absolute position.
+pub fn to_absolute(relative: &Location, base: &Location) -> Location {
+    if relative.row() == 1 {
+        Location::new(
+            relative.row() + base.row() - 1,
+            relative.column() + base.column(),
+        )
+    } else {
+        Location::new(relative.row() + base.row() - 1, relative.column())
+    }
+}

src/ast/mod.rs

@@ -1,4 +1,3 @@
-pub mod checkers;
 pub mod helpers;
 pub mod operations;
 pub mod relocate;

src/ast/operations.rs

@@ -1,6 +1,6 @@
-use rustpython_parser::ast::{Constant, Expr, ExprKind, Location, Stmt, StmtKind};
+use rustpython_parser::ast::{Constant, Expr, ExprKind, Stmt, StmtKind};
 
-use crate::ast::types::{BindingKind, Range, Scope};
+use crate::ast::types::{BindingKind, Scope};
 
 /// Extract the names bound to a given __all__ assignment.
 pub fn extract_all_names(stmt: &Stmt, scope: &Scope) -> Vec<String> {
@@ -117,69 +117,3 @@ pub fn is_unpacking_assignment(stmt: &Stmt) -> bool {
     }
     false
 }
-
-/// Struct used to efficiently slice source code at (row, column) Locations.
-pub struct SourceCodeLocator<'a> {
-    content: &'a str,
-    offsets: Vec<Vec<usize>>,
-    initialized: bool,
-}
-
-impl<'a> SourceCodeLocator<'a> {
-    pub fn new(content: &'a str) -> Self {
-        SourceCodeLocator {
-            content,
-            offsets: vec![],
-            initialized: false,
-        }
-    }
-
-    fn init(&mut self) {
-        if !self.initialized {
-            let mut offset = 0;
-            for line in self.content.lines() {
-                let mut newline = 0;
-                let mut line_offsets: Vec<usize> = vec![];
-                for (i, _char) in line.char_indices() {
-                    line_offsets.push(offset + i);
-                    newline = i + 1;
-                }
-                line_offsets.push(offset + newline);
-                self.offsets.push(line_offsets);
-                offset += newline + 1;
-            }
-            self.offsets.push(vec![offset]);
-            self.initialized = true;
-        }
-    }
-
-    pub fn slice_source_code_at(&mut self, location: &Location) -> &'a str {
-        self.init();
-        let offset = self.offsets[location.row() - 1][location.column() - 1];
-        &self.content[offset..]
-    }
-
-    pub fn slice_source_code_range(&mut self, range: &Range) -> &'a str {
-        self.init();
-        let start = self.offsets[range.location.row() - 1][range.location.column() - 1];
-        let end = self.offsets[range.end_location.row() - 1][range.end_location.column() - 1];
-        &self.content[start..end]
-    }
-
-    pub fn partition_source_code_at(
-        &mut self,
-        outer: &Range,
-        inner: &Range,
-    ) -> (&'a str, &'a str, &'a str) {
-        self.init();
-        let outer_start = self.offsets[outer.location.row() - 1][outer.location.column() - 1];
-        let outer_end = self.offsets[outer.end_location.row() - 1][outer.end_location.column() - 1];
-        let inner_start = self.offsets[inner.location.row() - 1][inner.location.column() - 1];
-        let inner_end = self.offsets[inner.end_location.row() - 1][inner.end_location.column() - 1];
-        (
-            &self.content[outer_start..inner_start],
-            &self.content[inner_start..inner_end],
-            &self.content[inner_end..outer_end],
-        )
-    }
-}

src/ast/relocate.rs

@@ -4,14 +4,14 @@ use crate::ast::types::Range;
 
 fn relocate_keyword(keyword: &mut Keyword, location: Range) {
     keyword.location = location.location;
-    keyword.end_location = location.end_location;
+    keyword.end_location = Some(location.end_location);
     relocate_expr(&mut keyword.node.value, location);
 }
 
 /// Change an expression's location (recursively) to match a desired, fixed location.
 pub fn relocate_expr(expr: &mut Expr, location: Range) {
     expr.location = location.location;
-    expr.end_location = location.end_location;
+    expr.end_location = Some(location.end_location);
     match &mut expr.node {
         ExprKind::BoolOp { values, .. } => {
             for expr in values {

src/ast/types.rs

@@ -18,7 +18,9 @@ impl Range {
     pub fn from_located<T>(located: &Located<T>) -> Self {
         Range {
             location: located.location,
-            end_location: located.end_location,
+            end_location: located
+                .end_location
+                .expect("AST nodes should have end_location."),
         }
     }
 }

src/autofix.rs

@@ -1,2 +0,0 @@
-pub mod fixer;
-pub mod fixes;

src/autofix/fixer.rs

@@ -1,7 +1,11 @@
+use std::collections::BTreeSet;
+
 use itertools::Itertools;
 use rustpython_parser::ast::Location;
 
-use crate::checks::{Check, Fix};
+use crate::autofix::Fix;
+use crate::autofix::Patch;
+use crate::checks::Check;
 
 #[derive(Hash)]
 pub enum Mode {
@@ -10,6 +14,17 @@ pub enum Mode {
     None,
 }
 
+impl Mode {
+    /// Return `true` if a patch should be generated under the given `Mode`.
+    pub fn patch(&self) -> bool {
+        match &self {
+            Mode::Generate => true,
+            Mode::Apply => true,
+            Mode::None => false,
+        }
+    }
+}
+
 impl From<bool> for Mode {
     fn from(value: bool) -> Self {
         match value {
@@ -35,34 +50,43 @@ pub fn fix_file(checks: &mut [Check], contents: &str) -> Option<String> {
 fn apply_fixes<'a>(fixes: impl Iterator<Item = &'a mut Fix>, contents: &str) -> String {
     let lines: Vec<&str> = contents.lines().collect();
 
-    let mut output = "".to_string();
-    let mut last_pos: Location = Location::new(0, 0);
+    let mut output: String = Default::default();
+    let mut last_pos: Location = Default::default();
+    let mut applied: BTreeSet<&Patch> = Default::default();
 
-    for fix in fixes.sorted_by_key(|fix| fix.location) {
-        // Best-effort approach: if this fix overlaps with a fix we've already applied, skip it.
-        if last_pos > fix.location {
+    for fix in fixes.sorted_by_key(|fix| fix.patch.location) {
+        // If we already applied an identical fix as part of another correction, skip any
+        // re-application.
+        if applied.contains(&fix.patch) {
+            fix.applied = true;
             continue;
         }
 
-        if fix.location.row() > last_pos.row() {
+        // Best-effort approach: if this fix overlaps with a fix we've already applied, skip it.
+        if last_pos > fix.patch.location {
+            continue;
+        }
+
+        if fix.patch.location.row() > last_pos.row() {
             if last_pos.row() > 0 || last_pos.column() > 0 {
-                output.push_str(&lines[last_pos.row() - 1][last_pos.column() - 1..]);
+                output.push_str(&lines[last_pos.row() - 1][last_pos.column()..]);
                 output.push('\n');
             }
-            for line in &lines[last_pos.row()..fix.location.row() - 1] {
+            for line in &lines[last_pos.row()..fix.patch.location.row() - 1] {
                 output.push_str(line);
                 output.push('\n');
             }
-            output.push_str(&lines[fix.location.row() - 1][..fix.location.column() - 1]);
-            output.push_str(&fix.content);
+            output.push_str(&lines[fix.patch.location.row() - 1][..fix.patch.location.column()]);
+            output.push_str(&fix.patch.content);
         } else {
             output.push_str(
-                &lines[last_pos.row() - 1][last_pos.column() - 1..fix.location.column() - 1],
+                &lines[last_pos.row() - 1][last_pos.column()..fix.patch.location.column()],
             );
-            output.push_str(&fix.content);
+            output.push_str(&fix.patch.content);
         }
+        last_pos = fix.patch.end_location;
 
-        last_pos = fix.end_location;
+        applied.insert(&fix.patch);
         fix.applied = true;
     }
 
@@ -70,7 +94,7 @@ fn apply_fixes<'a>(fixes: impl Iterator<Item = &'a mut Fix>, contents: &str) ->
         && (last_pos.row() - 1) < lines.len()
         && (last_pos.row() > 0 || last_pos.column() > 0)
     {
-        output.push_str(&lines[last_pos.row() - 1][last_pos.column() - 1..]);
+        output.push_str(&lines[last_pos.row() - 1][last_pos.column()..]);
         output.push('\n');
     }
     if last_pos.row() < lines.len() {
@@ -89,7 +113,8 @@ mod tests {
     use rustpython_parser::ast::Location;
 
     use crate::autofix::fixer::apply_fixes;
-    use crate::checks::Fix;
+    use crate::autofix::Fix;
+    use crate::autofix::Patch;
 
     #[test]
     fn empty_file() -> Result<()> {
@@ -105,9 +130,11 @@ mod tests {
     #[test]
     fn apply_single_replacement() -> Result<()> {
         let mut fixes = vec![Fix {
-            content: "Bar".to_string(),
-            location: Location::new(1, 9),
-            end_location: Location::new(1, 15),
+            patch: Patch {
+                content: "Bar".to_string(),
+                location: Location::new(1, 8),
+                end_location: Location::new(1, 14),
+            },
             applied: false,
         }];
         let actual = apply_fixes(
@@ -129,9 +156,11 @@ mod tests {
     #[test]
     fn apply_single_removal() -> Result<()> {
         let mut fixes = vec![Fix {
-            content: "".to_string(),
-            location: Location::new(1, 8),
-            end_location: Location::new(1, 16),
+            patch: Patch {
+                content: "".to_string(),
+                location: Location::new(1, 7),
+                end_location: Location::new(1, 15),
+            },
             applied: false,
         }];
         let actual = apply_fixes(
@@ -154,15 +183,19 @@ mod tests {
     fn apply_double_removal() -> Result<()> {
         let mut fixes = vec![
             Fix {
-                content: "".to_string(),
-                location: Location::new(1, 8),
-                end_location: Location::new(1, 17),
+                patch: Patch {
+                    content: "".to_string(),
+                    location: Location::new(1, 7),
+                    end_location: Location::new(1, 16),
+                },
                 applied: false,
             },
             Fix {
-                content: "".to_string(),
-                location: Location::new(1, 17),
-                end_location: Location::new(1, 24),
+                patch: Patch {
+                    content: "".to_string(),
+                    location: Location::new(1, 16),
+                    end_location: Location::new(1, 23),
+                },
                 applied: false,
             },
         ];
@@ -186,15 +219,19 @@ mod tests {
     fn ignore_overlapping_fixes() -> Result<()> {
         let mut fixes = vec![
             Fix {
-                content: "".to_string(),
-                location: Location::new(1, 8),
-                end_location: Location::new(1, 16),
+                patch: Patch {
+                    content: "".to_string(),
+                    location: Location::new(1, 7),
+                    end_location: Location::new(1, 15),
+                },
                 applied: false,
             },
             Fix {
-                content: "ignored".to_string(),
-                location: Location::new(1, 10),
-                end_location: Location::new(1, 12),
+                patch: Patch {
+                    content: "ignored".to_string(),
+                    location: Location::new(1, 9),
+                    end_location: Location::new(1, 11),
+                },
                 applied: false,
             },
         ];

src/autofix/fixes.rs

@@ -1,392 +0,0 @@
-use anyhow::Result;
-use itertools::Itertools;
-use libcst_native::ImportNames::Aliases;
-use libcst_native::NameOrAttribute::N;
-use libcst_native::{Codegen, Expression, SmallStatement, Statement};
-use rustpython_parser::ast::{ExcepthandlerKind, Expr, Keyword, Location, Stmt, StmtKind};
-use rustpython_parser::lexer;
-use rustpython_parser::token::Tok;
-
-use crate::ast::operations::SourceCodeLocator;
-use crate::ast::types::Range;
-use crate::checks::Fix;
-
-/// Convert a location within a file (relative to `base`) to an absolute position.
-fn to_absolute(relative: &Location, base: &Location) -> Location {
-    if relative.row() == 1 {
-        Location::new(
-            relative.row() + base.row() - 1,
-            relative.column() + base.column() - 1,
-        )
-    } else {
-        Location::new(relative.row() + base.row() - 1, relative.column())
-    }
-}
-
-/// Generate a fix to remove a base from a ClassDef statement.
-pub fn remove_class_def_base(
-    locator: &mut SourceCodeLocator,
-    stmt_at: &Location,
-    expr_at: Location,
-    bases: &[Expr],
-    keywords: &[Keyword],
-) -> Option<Fix> {
-    let content = locator.slice_source_code_at(stmt_at);
-
-    // Case 1: `object` is the only base.
-    if bases.len() == 1 && keywords.is_empty() {
-        let mut fix_start = None;
-        let mut fix_end = None;
-        let mut count: usize = 0;
-        for (start, tok, end) in lexer::make_tokenizer(content).flatten() {
-            if matches!(tok, Tok::Lpar) {
-                if count == 0 {
-                    fix_start = Some(to_absolute(&start, stmt_at));
-                }
-                count += 1;
-            }
-
-            if matches!(tok, Tok::Rpar) {
-                count -= 1;
-                if count == 0 {
-                    fix_end = Some(to_absolute(&end, stmt_at));
-                    break;
-                }
-            }
-        }
-
-        return match (fix_start, fix_end) {
-            (Some(start), Some(end)) => Some(Fix {
-                content: "".to_string(),
-                location: start,
-                end_location: end,
-                applied: false,
-            }),
-            _ => None,
-        };
-    }
-
-    if bases
-        .iter()
-        .map(|node| node.location)
-        .chain(keywords.iter().map(|node| node.location))
-        .any(|location| location > expr_at)
-    {
-        // Case 2: `object` is _not_ the last node.
-        let mut fix_start: Option<Location> = None;
-        let mut fix_end: Option<Location> = None;
-        let mut seen_comma = false;
-        for (start, tok, end) in lexer::make_tokenizer(content).flatten() {
-            let start = to_absolute(&start, stmt_at);
-            if seen_comma {
-                if matches!(tok, Tok::Newline) {
-                    fix_end = Some(end);
-                } else {
-                    fix_end = Some(start);
-                }
-                break;
-            }
-            if start == expr_at {
-                fix_start = Some(start);
-            }
-            if fix_start.is_some() && matches!(tok, Tok::Comma) {
-                seen_comma = true;
-            }
-        }
-
-        match (fix_start, fix_end) {
-            (Some(start), Some(end)) => Some(Fix {
-                content: "".to_string(),
-                location: start,
-                end_location: end,
-                applied: false,
-            }),
-            _ => None,
-        }
-    } else {
-        // Case 3: `object` is the last node, so we have to find the last token that isn't a comma.
-        let mut fix_start: Option<Location> = None;
-        let mut fix_end: Option<Location> = None;
-        for (start, tok, end) in lexer::make_tokenizer(content).flatten() {
-            let start = to_absolute(&start, stmt_at);
-            let end = to_absolute(&end, stmt_at);
-            if start == expr_at {
-                fix_end = Some(end);
-                break;
-            }
-            if matches!(tok, Tok::Comma) {
-                fix_start = Some(start);
-            }
-        }
-
-        match (fix_start, fix_end) {
-            (Some(start), Some(end)) => Some(Fix {
-                content: "".to_string(),
-                location: start,
-                end_location: end,
-                applied: false,
-            }),
-            _ => None,
-        }
-    }
-}
-
-pub fn remove_super_arguments(locator: &mut SourceCodeLocator, expr: &Expr) -> Option<Fix> {
-    let range = Range::from_located(expr);
-    let contents = locator.slice_source_code_range(&range);
-
-    let mut tree = match libcst_native::parse_module(contents, None) {
-        Ok(m) => m,
-        Err(_) => return None,
-    };
-
-    if let Some(Statement::Simple(body)) = tree.body.first_mut() {
-        if let Some(SmallStatement::Expr(body)) = body.body.first_mut() {
-            if let Expression::Call(body) = &mut body.value {
-                body.args = vec![];
-                body.whitespace_before_args = Default::default();
-                body.whitespace_after_func = Default::default();
-
-                let mut state = Default::default();
-                tree.codegen(&mut state);
-
-                return Some(Fix {
-                    content: state.to_string(),
-                    location: range.location,
-                    end_location: range.end_location,
-                    applied: false,
-                });
-            }
-        }
-    }
-
-    None
-}
-
-/// Determine if a body contains only a single statement, taking into account deleted.
-fn has_single_child(body: &[Stmt], deleted: &[&Stmt]) -> bool {
-    body.iter().filter(|child| !deleted.contains(child)).count() == 1
-}
-
-/// Determine if a child is the only statement in its body.
-fn is_lone_child(child: &Stmt, parent: &Stmt, deleted: &[&Stmt]) -> Result<bool> {
-    match &parent.node {
-        StmtKind::FunctionDef { body, .. }
-        | StmtKind::AsyncFunctionDef { body, .. }
-        | StmtKind::ClassDef { body, .. }
-        | StmtKind::With { body, .. }
-        | StmtKind::AsyncWith { body, .. } => {
-            if body.iter().contains(child) {
-                Ok(has_single_child(body, deleted))
-            } else {
-                Err(anyhow::anyhow!("Unable to find child in parent body."))
-            }
-        }
-        StmtKind::For { body, orelse, .. }
-        | StmtKind::AsyncFor { body, orelse, .. }
-        | StmtKind::While { body, orelse, .. }
-        | StmtKind::If { body, orelse, .. } => {
-            if body.iter().contains(child) {
-                Ok(has_single_child(body, deleted))
-            } else if orelse.iter().contains(child) {
-                Ok(has_single_child(orelse, deleted))
-            } else {
-                Err(anyhow::anyhow!("Unable to find child in parent body."))
-            }
-        }
-        StmtKind::Try {
-            body,
-            handlers,
-            orelse,
-            finalbody,
-        } => {
-            if body.iter().contains(child) {
-                Ok(has_single_child(body, deleted))
-            } else if orelse.iter().contains(child) {
-                Ok(has_single_child(orelse, deleted))
-            } else if finalbody.iter().contains(child) {
-                Ok(has_single_child(finalbody, deleted))
-            } else if let Some(body) = handlers.iter().find_map(|handler| match &handler.node {
-                ExcepthandlerKind::ExceptHandler { body, .. } => {
-                    if body.iter().contains(child) {
-                        Some(body)
-                    } else {
-                        None
-                    }
-                }
-            }) {
-                Ok(has_single_child(body, deleted))
-            } else {
-                Err(anyhow::anyhow!("Unable to find child in parent body."))
-            }
-        }
-        _ => Err(anyhow::anyhow!("Unable to find child in parent body.")),
-    }
-}
-
-pub fn remove_stmt(stmt: &Stmt, parent: Option<&Stmt>, deleted: &[&Stmt]) -> Result<Fix> {
-    if parent
-        .map(|parent| is_lone_child(stmt, parent, deleted))
-        .map_or(Ok(None), |v| v.map(Some))?
-        .unwrap_or_default()
-    {
-        // If removing this node would lead to an invalid syntax tree, replace
-        // it with a `pass`.
-        Ok(Fix {
-            location: stmt.location,
-            end_location: stmt.end_location,
-            content: "pass".to_string(),
-            applied: false,
-        })
-    } else {
-        // Otherwise, nuke the entire line.
-        // TODO(charlie): This logic assumes that there are no multi-statement physical lines.
-        Ok(Fix {
-            location: Location::new(stmt.location.row(), 1),
-            end_location: Location::new(stmt.end_location.row() + 1, 1),
-            content: "".to_string(),
-            applied: false,
-        })
-    }
-}
-
-/// Generate a Fix to remove any unused imports from an `import` statement.
-pub fn remove_unused_imports(
-    locator: &mut SourceCodeLocator,
-    full_names: &[&str],
-    stmt: &Stmt,
-    parent: Option<&Stmt>,
-    deleted: &[&Stmt],
-) -> Result<Fix> {
-    let mut tree = match libcst_native::parse_module(
-        locator.slice_source_code_range(&Range::from_located(stmt)),
-        None,
-    ) {
-        Ok(m) => m,
-        Err(_) => return Err(anyhow::anyhow!("Failed to extract CST from source.")),
-    };
-
-    let body = if let Some(Statement::Simple(body)) = tree.body.first_mut() {
-        body
-    } else {
-        return Err(anyhow::anyhow!("Expected node to be: Statement::Simple."));
-    };
-    let body = if let Some(SmallStatement::Import(body)) = body.body.first_mut() {
-        body
-    } else {
-        return Err(anyhow::anyhow!(
-            "Expected node to be: SmallStatement::ImportFrom."
-        ));
-    };
-    let aliases = &mut body.names;
-
-    // Preserve the trailing comma (or not) from the last entry.
-    let trailing_comma = aliases.last().and_then(|alias| alias.comma.clone());
-
-    // Identify unused imports from within the `import from`.
-    let mut removable = vec![];
-    for (index, alias) in aliases.iter().enumerate() {
-        if let N(import_name) = &alias.name {
-            if full_names.contains(&import_name.value) {
-                removable.push(index);
-            }
-        }
-    }
-    // TODO(charlie): This is quadratic.
-    for index in removable.iter().rev() {
-        aliases.remove(*index);
-    }
-
-    if let Some(alias) = aliases.last_mut() {
-        alias.comma = trailing_comma;
-    }
-
-    if aliases.is_empty() {
-        remove_stmt(stmt, parent, deleted)
-    } else {
-        let mut state = Default::default();
-        tree.codegen(&mut state);
-
-        Ok(Fix {
-            content: state.to_string(),
-            location: stmt.location,
-            end_location: stmt.end_location,
-            applied: false,
-        })
-    }
-}
-
-/// Generate a Fix to remove any unused imports from an `import from` statement.
-pub fn remove_unused_import_froms(
-    locator: &mut SourceCodeLocator,
-    full_names: &[&str],
-    stmt: &Stmt,
-    parent: Option<&Stmt>,
-    deleted: &[&Stmt],
-) -> Result<Fix> {
-    let mut tree = match libcst_native::parse_module(
-        locator.slice_source_code_range(&Range::from_located(stmt)),
-        None,
-    ) {
-        Ok(m) => m,
-        Err(_) => return Err(anyhow::anyhow!("Failed to extract CST from source.")),
-    };
-
-    let body = if let Some(Statement::Simple(body)) = tree.body.first_mut() {
-        body
-    } else {
-        return Err(anyhow::anyhow!("Expected node to be: Statement::Simple."));
-    };
-    let body = if let Some(SmallStatement::ImportFrom(body)) = body.body.first_mut() {
-        body
-    } else {
-        return Err(anyhow::anyhow!(
-            "Expected node to be: SmallStatement::ImportFrom."
-        ));
-    };
-    let aliases = if let Aliases(aliases) = &mut body.names {
-        aliases
-    } else {
-        return Err(anyhow::anyhow!("Expected node to be: Aliases."));
-    };
-
-    // Preserve the trailing comma (or not) from the last entry.
-    let trailing_comma = aliases.last().and_then(|alias| alias.comma.clone());
-
-    // Identify unused imports from within the `import from`.
-    let mut removable = vec![];
-    for (index, alias) in aliases.iter().enumerate() {
-        if let N(name) = &alias.name {
-            let import_name = if let Some(N(module_name)) = &body.module {
-                format!("{}.{}", module_name.value, name.value)
-            } else {
-                name.value.to_string()
-            };
-            if full_names.contains(&import_name.as_str()) {
-                removable.push(index);
-            }
-        }
-    }
-    // TODO(charlie): This is quadratic.
-    for index in removable.iter().rev() {
-        aliases.remove(*index);
-    }
-
-    if let Some(alias) = aliases.last_mut() {
-        alias.comma = trailing_comma;
-    }
-
-    if aliases.is_empty() {
-        remove_stmt(stmt, parent, deleted)
-    } else {
-        let mut state = Default::default();
-        tree.codegen(&mut state);
-
-        Ok(Fix {
-            content: state.to_string(),
-            location: stmt.location,
-            end_location: stmt.end_location,
-            applied: false,
-        })
-    }
-}

src/autofix/helpers.rs

@@ -0,0 +1,89 @@
+use anyhow::Result;
+use itertools::Itertools;
+use rustpython_parser::ast::{ExcepthandlerKind, Location, Stmt, StmtKind};
+
+use crate::autofix::Fix;
+
+/// Determine if a body contains only a single statement, taking into account deleted.
+fn has_single_child(body: &[Stmt], deleted: &[&Stmt]) -> bool {
+    body.iter().filter(|child| !deleted.contains(child)).count() == 1
+}
+
+/// Determine if a child is the only statement in its body.
+fn is_lone_child(child: &Stmt, parent: &Stmt, deleted: &[&Stmt]) -> Result<bool> {
+    match &parent.node {
+        StmtKind::FunctionDef { body, .. }
+        | StmtKind::AsyncFunctionDef { body, .. }
+        | StmtKind::ClassDef { body, .. }
+        | StmtKind::With { body, .. }
+        | StmtKind::AsyncWith { body, .. } => {
+            if body.iter().contains(child) {
+                Ok(has_single_child(body, deleted))
+            } else {
+                Err(anyhow::anyhow!("Unable to find child in parent body."))
+            }
+        }
+        StmtKind::For { body, orelse, .. }
+        | StmtKind::AsyncFor { body, orelse, .. }
+        | StmtKind::While { body, orelse, .. }
+        | StmtKind::If { body, orelse, .. } => {
+            if body.iter().contains(child) {
+                Ok(has_single_child(body, deleted))
+            } else if orelse.iter().contains(child) {
+                Ok(has_single_child(orelse, deleted))
+            } else {
+                Err(anyhow::anyhow!("Unable to find child in parent body."))
+            }
+        }
+        StmtKind::Try {
+            body,
+            handlers,
+            orelse,
+            finalbody,
+        } => {
+            if body.iter().contains(child) {
+                Ok(has_single_child(body, deleted))
+            } else if orelse.iter().contains(child) {
+                Ok(has_single_child(orelse, deleted))
+            } else if finalbody.iter().contains(child) {
+                Ok(has_single_child(finalbody, deleted))
+            } else if let Some(body) = handlers.iter().find_map(|handler| match &handler.node {
+                ExcepthandlerKind::ExceptHandler { body, .. } => {
+                    if body.iter().contains(child) {
+                        Some(body)
+                    } else {
+                        None
+                    }
+                }
+            }) {
+                Ok(has_single_child(body, deleted))
+            } else {
+                Err(anyhow::anyhow!("Unable to find child in parent body."))
+            }
+        }
+        _ => Err(anyhow::anyhow!("Unable to find child in parent body.")),
+    }
+}
+
+pub fn remove_stmt(stmt: &Stmt, parent: Option<&Stmt>, deleted: &[&Stmt]) -> Result<Fix> {
+    if parent
+        .map(|parent| is_lone_child(stmt, parent, deleted))
+        .map_or(Ok(None), |v| v.map(Some))?
+        .unwrap_or_default()
+    {
+        // If removing this node would lead to an invalid syntax tree, replace
+        // it with a `pass`.
+        Ok(Fix::replacement(
+            "pass".to_string(),
+            stmt.location,
+            stmt.end_location.unwrap(),
+        ))
+    } else {
+        // Otherwise, nuke the entire line.
+        // TODO(charlie): This logic assumes that there are no multi-statement physical lines.
+        Ok(Fix::deletion(
+            Location::new(stmt.location.row(), 0),
+            Location::new(stmt.end_location.unwrap().row() + 1, 0),
+        ))
+    }
+}

src/autofix/mod.rs

@@ -0,0 +1,53 @@
+use rustpython_ast::Location;
+use serde::{Deserialize, Serialize};
+
+pub mod fixer;
+pub mod helpers;
+
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
+pub struct Patch {
+    pub content: String,
+    pub location: Location,
+    pub end_location: Location,
+}
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct Fix {
+    pub patch: Patch,
+    pub applied: bool,
+}
+
+impl Fix {
+    pub fn deletion(start: Location, end: Location) -> Self {
+        Self {
+            patch: Patch {
+                content: "".to_string(),
+                location: start,
+                end_location: end,
+            },
+            applied: false,
+        }
+    }
+
+    pub fn replacement(content: String, start: Location, end: Location) -> Self {
+        Self {
+            patch: Patch {
+                content,
+                location: start,
+                end_location: end,
+            },
+            applied: false,
+        }
+    }
+
+    pub fn insertion(content: String, at: Location) -> Self {
+        Self {
+            patch: Patch {
+                content,
+                location: at,
+                end_location: at,
+            },
+            applied: false,
+        }
+    }
+}

src/check_lines.rs

@@ -1,10 +1,13 @@
+//! Lint rules based on checking raw physical lines.
+
 use std::collections::BTreeMap;
 
 use rustpython_parser::ast::Location;
 
 use crate::ast::types::Range;
 use crate::autofix::fixer;
-use crate::checks::{Check, CheckCode, CheckKind, Fix};
+use crate::autofix::Fix;
+use crate::checks::{Check, CheckCode, CheckKind};
 use crate::noqa;
 use crate::noqa::Directive;
 use crate::settings::Settings;
@@ -91,8 +94,8 @@ pub fn check_lines(
                 let check = Check::new(
                     CheckKind::LineTooLong(line_length, settings.line_length),
                     Range {
-                        location: Location::new(lineno + 1, 1),
-                        end_location: Location::new(lineno + 1, line_length + 1),
+                        location: Location::new(lineno + 1, 0),
+                        end_location: Location::new(lineno + 1, line_length),
                     },
                 );
 
@@ -161,20 +164,15 @@ pub fn check_lines(
                         let mut check = Check::new(
                             CheckKind::UnusedNOQA(None),
                             Range {
-                                location: Location::new(row + 1, start + 1),
-                                end_location: Location::new(row + 1, end + 1),
+                                location: Location::new(row + 1, start),
+                                end_location: Location::new(row + 1, end),
                             },
                         );
-                        if matches!(autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
-                            check.amend(Fix {
-                                content: "".to_string(),
-                                location: Location::new(row + 1, start + 1),
-                                end_location: Location::new(
-                                    row + 1,
-                                    lines[row].chars().count() + 1,
-                                ),
-                                applied: false,
-                            });
+                        if autofix.patch() {
+                            check.amend(Fix::deletion(
+                                Location::new(row + 1, start),
+                                Location::new(row + 1, lines[row].chars().count()),
+                            ));
                         }
                         line_checks.push(check);
                     }
@@ -194,31 +192,22 @@ pub fn check_lines(
                         let mut check = Check::new(
                             CheckKind::UnusedNOQA(Some(invalid_codes)),
                             Range {
-                                location: Location::new(row + 1, start + 1),
-                                end_location: Location::new(row + 1, end + 1),
+                                location: Location::new(row + 1, start),
+                                end_location: Location::new(row + 1, end),
                             },
                         );
-                        if matches!(autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
+                        if autofix.patch() {
                             if valid_codes.is_empty() {
-                                check.amend(Fix {
-                                    content: "".to_string(),
-                                    location: Location::new(row + 1, start + 1),
-                                    end_location: Location::new(
-                                        row + 1,
-                                        lines[row].chars().count() + 1,
-                                    ),
-                                    applied: false,
-                                });
+                                check.amend(Fix::deletion(
+                                    Location::new(row + 1, start),
+                                    Location::new(row + 1, lines[row].chars().count()),
+                                ));
                             } else {
-                                check.amend(Fix {
-                                    content: format!("  # noqa: {}", valid_codes.join(", ")),
-                                    location: Location::new(row + 1, start + 1),
-                                    end_location: Location::new(
-                                        row + 1,
-                                        lines[row].chars().count() + 1,
-                                    ),
-                                    applied: false,
-                                });
+                                check.amend(Fix::replacement(
+                                    format!("  # noqa: {}", valid_codes.join(", ")),
+                                    Location::new(row + 1, start),
+                                    Location::new(row + 1, lines[row].chars().count()),
+                                ));
                             }
                         }
                         line_checks.push(check);
@@ -240,7 +229,7 @@ pub fn check_lines(
 mod tests {
     use crate::autofix::fixer;
     use crate::checks::{Check, CheckCode};
-    use crate::settings;
+    use crate::settings::Settings;
 
     use super::check_lines;
 
@@ -254,9 +243,9 @@ mod tests {
                 &mut checks,
                 line,
                 &noqa_line_for,
-                &settings::Settings {
+                &Settings {
                     line_length,
-                    ..settings::Settings::for_rule(CheckCode::E501)
+                    ..Settings::for_rule(CheckCode::E501)
                 },
                 &fixer::Mode::Generate,
             );

src/check_tokens.rs

@@ -0,0 +1,51 @@
+//! Lint rules based on token traversal.
+
+use rustpython_parser::lexer::{LexResult, Tok};
+
+use crate::checks::{Check, CheckCode};
+use crate::flake8_quotes::docstring_detection::StateMachine;
+use crate::source_code_locator::SourceCodeLocator;
+use crate::{flake8_quotes, pycodestyle, Settings};
+
+pub fn check_tokens(
+    checks: &mut Vec<Check>,
+    locator: &SourceCodeLocator,
+    tokens: &[LexResult],
+    settings: &Settings,
+) {
+    let enforce_invalid_escape_sequence = settings.enabled.contains(&CheckCode::W605);
+    let enforce_quotes = settings.enabled.contains(&CheckCode::Q000)
+        | settings.enabled.contains(&CheckCode::Q001)
+        | settings.enabled.contains(&CheckCode::Q002)
+        | settings.enabled.contains(&CheckCode::Q003);
+
+    let mut state_machine = StateMachine::new();
+    for (start, tok, end) in tokens.iter().flatten() {
+        // W605
+        if enforce_invalid_escape_sequence {
+            if matches!(tok, Tok::String { .. }) {
+                checks.extend(pycodestyle::checks::invalid_escape_sequence(
+                    locator, start, end,
+                ));
+            }
+        }
+
+        // flake8-quotes
+        if enforce_quotes {
+            let is_docstring = state_machine.consume(tok);
+            if matches!(tok, Tok::String { .. }) {
+                if let Some(check) = flake8_quotes::checks::quotes(
+                    locator,
+                    start,
+                    end,
+                    is_docstring,
+                    &settings.flake8_quotes,
+                ) {
+                    if settings.enabled.contains(check.kind.code()) {
+                        checks.push(check);
+                    }
+                }
+            }
+        }
+    }
+}

src/checks.rs

@@ -5,8 +5,10 @@ use rustpython_parser::ast::Location;
 use serde::{Deserialize, Serialize};
 use strum_macros::{AsRefStr, EnumIter, EnumString};
 
-use crate::ast::checkers::Primitive;
 use crate::ast::types::Range;
+use crate::autofix::Fix;
+use crate::flake8_quotes::settings::Quote;
+use crate::pyupgrade::types::Primitive;
 
 #[derive(
     AsRefStr,
@@ -40,6 +42,7 @@ pub enum CheckCode {
     E999,
     // pycodestyle warnings
     W292,
+    W605,
     // pyflakes
     F401,
     F402,
@@ -74,8 +77,13 @@ pub enum CheckCode {
     A002,
     A003,
     // flake8-bugbear
+    B002,
+    B006,
+    B007,
     B011,
+    B013,
     B014,
+    B017,
     B025,
     // flake8-comprehensions
     C400,
@@ -97,6 +105,11 @@ pub enum CheckCode {
     // flake8-print
     T201,
     T203,
+    // flake8-quotes
+    Q000,
+    Q001,
+    Q002,
+    Q003,
     // pyupgrade
     U001,
     U002,
@@ -157,6 +170,16 @@ pub enum CheckCode {
     N803,
     N804,
     N805,
+    N806,
+    N807,
+    N811,
+    N812,
+    N813,
+    N814,
+    N815,
+    N816,
+    N817,
+    N818,
     // Meta
     M001,
 }
@@ -164,7 +187,8 @@ pub enum CheckCode {
 #[derive(EnumIter, Debug, PartialEq, Eq)]
 pub enum CheckCategory {
     Pyflakes,
-    Pycodestyle,
+    PycodestyleError,
+    PycodestyleWarning,
     Pydocstyle,
     Pyupgrade,
     PEP8Naming,
@@ -172,18 +196,21 @@ pub enum CheckCategory {
     Flake8Bugbear,
     Flake8Builtins,
     Flake8Print,
+    Flake8Quotes,
     Meta,
 }
 
 impl CheckCategory {
     pub fn title(&self) -> &'static str {
         match self {
-            CheckCategory::Pycodestyle => "pycodestyle",
+            CheckCategory::PycodestyleError => "pycodestyle (error)",
+            CheckCategory::PycodestyleWarning => "pycodestyle (warning)",
             CheckCategory::Pyflakes => "Pyflakes",
             CheckCategory::Flake8Builtins => "flake8-builtins",
             CheckCategory::Flake8Bugbear => "flake8-bugbear",
             CheckCategory::Flake8Comprehensions => "flake8-comprehensions",
             CheckCategory::Flake8Print => "flake8-print",
+            CheckCategory::Flake8Quotes => "flake8-quotes",
             CheckCategory::Pyupgrade => "pyupgrade",
             CheckCategory::Pydocstyle => "pydocstyle",
             CheckCategory::PEP8Naming => "pep8-naming",
@@ -195,8 +222,9 @@ impl CheckCategory {
 #[allow(clippy::upper_case_acronyms)]
 pub enum LintSource {
     AST,
-    Lines,
     FileSystem,
+    Lines,
+    Tokens,
 }
 
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
@@ -211,18 +239,30 @@ pub enum CheckKind {
     AmbiguousClassName(String),
     AmbiguousFunctionName(String),
     AmbiguousVariableName(String),
+    DoNotAssignLambda,
+    DoNotUseBareExcept,
+    IOError(String),
+    LineTooLong(usize, usize),
+    ModuleImportNotAtTopOfFile,
+    NoneComparison(RejectedCmpop),
+    NotInTest,
+    NotIsTest,
+    SyntaxError(String),
+    TrueFalseComparison(bool, RejectedCmpop),
+    TypeComparison,
+    // pycodestyle warnings
+    NoNewLineAtEndOfFile,
+    InvalidEscapeSequence(char),
+    // pyflakes
     AssertTuple,
     BreakOutsideLoop,
     ContinueOutsideLoop,
     DefaultExceptNotLast,
-    DoNotAssignLambda,
-    DoNotUseBareExcept,
     DuplicateArgumentName,
     ExpressionsInStarAssignment,
     FStringMissingPlaceholders,
     ForwardAnnotationSyntaxError(String),
     FutureFeatureNotDefined(String),
-    IOError(String),
     IfTuple,
     ImportShadowedByLoopVar(String, usize),
     ImportStarNotPermitted(String),
@@ -231,34 +271,29 @@ pub enum CheckKind {
     InvalidPrintSyntax,
     IsLiteral,
     LateFutureImport,
-    LineTooLong(usize, usize),
-    ModuleImportNotAtTopOfFile,
     MultiValueRepeatedKeyLiteral,
     MultiValueRepeatedKeyVariable(String),
-    NoneComparison(RejectedCmpop),
-    NotInTest,
-    NotIsTest,
     RaiseNotImplemented,
     ReturnOutsideFunction,
-    SyntaxError(String),
-    TrueFalseComparison(bool, RejectedCmpop),
     TwoStarredExpressions,
-    TypeComparison,
     UndefinedExport(String),
     UndefinedLocal(String),
     UndefinedName(String),
-    UnusedImport(Vec<String>),
+    UnusedImport(Vec<String>, bool),
     UnusedVariable(String),
     YieldOutsideFunction,
-    // pycodestyle warnings
-    NoNewLineAtEndOfFile,
-    // flake8-builtin
+    // flake8-builtins
     BuiltinVariableShadowing(String),
     BuiltinArgumentShadowing(String),
     BuiltinAttributeShadowing(String),
     // flake8-bugbear
+    UnaryPrefixIncrement,
+    MutableArgumentDefault,
+    UnusedLoopControlVariable(String),
     DoNotAssertFalse,
+    RedundantTupleInExceptionHandler(String),
     DuplicateHandlerException(Vec<String>),
+    NoAssertRaisesException,
     DuplicateTryBlockException(String),
     // flake8-comprehensions
     UnnecessaryGeneratorList,
@@ -280,6 +315,11 @@ pub enum CheckKind {
     // flake8-print
     PrintFound,
     PPrintFound,
+    // flake8-quotes
+    BadQuotesInlineString(Quote),
+    BadQuotesMultilineString(Quote),
+    BadQuotesDocstring(Quote),
+    AvoidQuoteEscape,
     // pyupgrade
     TypeOfPrimitive(Primitive),
     UnnecessaryAbspath,
@@ -292,6 +332,7 @@ pub enum CheckKind {
     // pydocstyle
     BlankLineAfterLastSection(String),
     BlankLineAfterSection(String),
+    BlankLineAfterSummary,
     BlankLineBeforeSection(String),
     CapitalizeSectionName(String),
     DashedUnderlineAfterSection(String),
@@ -307,7 +348,6 @@ pub enum CheckKind {
     NewLineAfterLastParagraph,
     NewLineAfterSectionName(String),
     NoBlankLineAfterFunction(usize),
-    NoBlankLineAfterSummary,
     NoBlankLineBeforeClass(usize),
     NoBlankLineBeforeFunction(usize),
     NoBlankLinesBetweenHeaderAndContent(String),
@@ -340,6 +380,16 @@ pub enum CheckKind {
     InvalidArgumentName(String),
     InvalidFirstArgumentNameForClassMethod,
     InvalidFirstArgumentNameForMethod,
+    NonLowercaseVariableInFunction(String),
+    DunderFunctionName,
+    ConstantImportedAsNonConstant(String, String),
+    LowercaseImportedAsNonLowercase(String, String),
+    CamelcaseImportedAsLowercase(String, String),
+    CamelcaseImportedAsConstant(String, String),
+    MixedCaseVariableInClassScope(String),
+    MixedCaseVariableInGlobalScope(String),
+    CamelcaseImportedAsAcronym(String, String),
+    ErrorSuffixOnExceptionName(String),
     // Meta
     UnusedNOQA(Option<Vec<String>>),
 }
@@ -349,6 +399,11 @@ impl CheckCode {
     pub fn lint_source(&self) -> &'static LintSource {
         match self {
             CheckCode::E501 | CheckCode::W292 | CheckCode::M001 => &LintSource::Lines,
+            CheckCode::W605
+            | CheckCode::Q000
+            | CheckCode::Q001
+            | CheckCode::Q002
+            | CheckCode::Q003 => &LintSource::Tokens,
             CheckCode::E902 => &LintSource::FileSystem,
             _ => &LintSource::AST,
         }
@@ -374,8 +429,9 @@ impl CheckCode {
             CheckCode::E999 => CheckKind::SyntaxError("`...`".to_string()),
             // pycodestyle warnings
             CheckCode::W292 => CheckKind::NoNewLineAtEndOfFile,
+            CheckCode::W605 => CheckKind::InvalidEscapeSequence('c'),
             // pyflakes
-            CheckCode::F401 => CheckKind::UnusedImport(vec!["...".to_string()]),
+            CheckCode::F401 => CheckKind::UnusedImport(vec!["...".to_string()], false),
             CheckCode::F402 => CheckKind::ImportShadowedByLoopVar("...".to_string(), 1),
             CheckCode::F403 => CheckKind::ImportStarUsed("...".to_string()),
             CheckCode::F404 => CheckKind::LateFutureImport,
@@ -410,8 +466,15 @@ impl CheckCode {
             CheckCode::A002 => CheckKind::BuiltinArgumentShadowing("...".to_string()),
             CheckCode::A003 => CheckKind::BuiltinAttributeShadowing("...".to_string()),
             // flake8-bugbear
+            CheckCode::B002 => CheckKind::UnaryPrefixIncrement,
+            CheckCode::B006 => CheckKind::MutableArgumentDefault,
+            CheckCode::B007 => CheckKind::UnusedLoopControlVariable("i".to_string()),
             CheckCode::B011 => CheckKind::DoNotAssertFalse,
+            CheckCode::B013 => {
+                CheckKind::RedundantTupleInExceptionHandler("ValueError".to_string())
+            }
             CheckCode::B014 => CheckKind::DuplicateHandlerException(vec!["ValueError".to_string()]),
+            CheckCode::B017 => CheckKind::NoAssertRaisesException,
             CheckCode::B025 => CheckKind::DuplicateTryBlockException("Exception".to_string()),
             // flake8-comprehensions
             CheckCode::C400 => CheckKind::UnnecessaryGeneratorList,
@@ -446,6 +509,11 @@ impl CheckCode {
             // flake8-print
             CheckCode::T201 => CheckKind::PrintFound,
             CheckCode::T203 => CheckKind::PPrintFound,
+            // flake8-quotes
+            CheckCode::Q000 => CheckKind::BadQuotesInlineString(Quote::Double),
+            CheckCode::Q001 => CheckKind::BadQuotesMultilineString(Quote::Double),
+            CheckCode::Q002 => CheckKind::BadQuotesDocstring(Quote::Double),
+            CheckCode::Q003 => CheckKind::AvoidQuoteEscape,
             // pyupgrade
             CheckCode::U001 => CheckKind::UselessMetaclassType,
             CheckCode::U002 => CheckKind::UnnecessaryAbspath,
@@ -472,7 +540,7 @@ impl CheckCode {
             CheckCode::D202 => CheckKind::NoBlankLineAfterFunction(1),
             CheckCode::D203 => CheckKind::OneBlankLineBeforeClass(0),
             CheckCode::D204 => CheckKind::OneBlankLineAfterClass(0),
-            CheckCode::D205 => CheckKind::NoBlankLineAfterSummary,
+            CheckCode::D205 => CheckKind::BlankLineAfterSummary,
             CheckCode::D206 => CheckKind::IndentWithSpaces,
             CheckCode::D207 => CheckKind::NoUnderIndentation,
             CheckCode::D208 => CheckKind::NoOverIndentation,
@@ -515,6 +583,26 @@ impl CheckCode {
             CheckCode::N803 => CheckKind::InvalidArgumentName("...".to_string()),
             CheckCode::N804 => CheckKind::InvalidFirstArgumentNameForClassMethod,
             CheckCode::N805 => CheckKind::InvalidFirstArgumentNameForMethod,
+            CheckCode::N806 => CheckKind::NonLowercaseVariableInFunction("...".to_string()),
+            CheckCode::N807 => CheckKind::DunderFunctionName,
+            CheckCode::N811 => {
+                CheckKind::ConstantImportedAsNonConstant("...".to_string(), "...".to_string())
+            }
+            CheckCode::N812 => {
+                CheckKind::LowercaseImportedAsNonLowercase("...".to_string(), "...".to_string())
+            }
+            CheckCode::N813 => {
+                CheckKind::CamelcaseImportedAsLowercase("...".to_string(), "...".to_string())
+            }
+            CheckCode::N814 => {
+                CheckKind::CamelcaseImportedAsConstant("...".to_string(), "...".to_string())
+            }
+            CheckCode::N815 => CheckKind::MixedCaseVariableInClassScope("mixedCase".to_string()),
+            CheckCode::N816 => CheckKind::MixedCaseVariableInGlobalScope("mixedCase".to_string()),
+            CheckCode::N817 => {
+                CheckKind::CamelcaseImportedAsAcronym("...".to_string(), "...".to_string())
+            }
+            CheckCode::N818 => CheckKind::ErrorSuffixOnExceptionName("...".to_string()),
             // Meta
             CheckCode::M001 => CheckKind::UnusedNOQA(None),
         }
@@ -522,21 +610,22 @@ impl CheckCode {
 
     pub fn category(&self) -> CheckCategory {
         match self {
-            CheckCode::E402 => CheckCategory::Pycodestyle,
-            CheckCode::E501 => CheckCategory::Pycodestyle,
-            CheckCode::E711 => CheckCategory::Pycodestyle,
-            CheckCode::E712 => CheckCategory::Pycodestyle,
-            CheckCode::E713 => CheckCategory::Pycodestyle,
-            CheckCode::E714 => CheckCategory::Pycodestyle,
-            CheckCode::E721 => CheckCategory::Pycodestyle,
-            CheckCode::E722 => CheckCategory::Pycodestyle,
-            CheckCode::E731 => CheckCategory::Pycodestyle,
-            CheckCode::E741 => CheckCategory::Pycodestyle,
-            CheckCode::E742 => CheckCategory::Pycodestyle,
-            CheckCode::E743 => CheckCategory::Pycodestyle,
-            CheckCode::E902 => CheckCategory::Pycodestyle,
-            CheckCode::E999 => CheckCategory::Pycodestyle,
-            CheckCode::W292 => CheckCategory::Pycodestyle,
+            CheckCode::E402 => CheckCategory::PycodestyleError,
+            CheckCode::E501 => CheckCategory::PycodestyleError,
+            CheckCode::E711 => CheckCategory::PycodestyleError,
+            CheckCode::E712 => CheckCategory::PycodestyleError,
+            CheckCode::E713 => CheckCategory::PycodestyleError,
+            CheckCode::E714 => CheckCategory::PycodestyleError,
+            CheckCode::E721 => CheckCategory::PycodestyleError,
+            CheckCode::E722 => CheckCategory::PycodestyleError,
+            CheckCode::E731 => CheckCategory::PycodestyleError,
+            CheckCode::E741 => CheckCategory::PycodestyleError,
+            CheckCode::E742 => CheckCategory::PycodestyleError,
+            CheckCode::E743 => CheckCategory::PycodestyleError,
+            CheckCode::E902 => CheckCategory::PycodestyleError,
+            CheckCode::E999 => CheckCategory::PycodestyleError,
+            CheckCode::W292 => CheckCategory::PycodestyleWarning,
+            CheckCode::W605 => CheckCategory::PycodestyleWarning,
             CheckCode::F401 => CheckCategory::Pyflakes,
             CheckCode::F402 => CheckCategory::Pyflakes,
             CheckCode::F403 => CheckCategory::Pyflakes,
@@ -568,8 +657,13 @@ impl CheckCode {
             CheckCode::A001 => CheckCategory::Flake8Builtins,
             CheckCode::A002 => CheckCategory::Flake8Builtins,
             CheckCode::A003 => CheckCategory::Flake8Builtins,
+            CheckCode::B002 => CheckCategory::Flake8Bugbear,
+            CheckCode::B006 => CheckCategory::Flake8Bugbear,
+            CheckCode::B007 => CheckCategory::Flake8Bugbear,
             CheckCode::B011 => CheckCategory::Flake8Bugbear,
+            CheckCode::B013 => CheckCategory::Flake8Bugbear,
             CheckCode::B014 => CheckCategory::Flake8Bugbear,
+            CheckCode::B017 => CheckCategory::Flake8Bugbear,
             CheckCode::B025 => CheckCategory::Flake8Bugbear,
             CheckCode::C400 => CheckCategory::Flake8Comprehensions,
             CheckCode::C401 => CheckCategory::Flake8Comprehensions,
@@ -589,6 +683,10 @@ impl CheckCode {
             CheckCode::C417 => CheckCategory::Flake8Comprehensions,
             CheckCode::T201 => CheckCategory::Flake8Print,
             CheckCode::T203 => CheckCategory::Flake8Print,
+            CheckCode::Q000 => CheckCategory::Flake8Quotes,
+            CheckCode::Q001 => CheckCategory::Flake8Quotes,
+            CheckCode::Q002 => CheckCategory::Flake8Quotes,
+            CheckCode::Q003 => CheckCategory::Flake8Quotes,
             CheckCode::U001 => CheckCategory::Pyupgrade,
             CheckCode::U002 => CheckCategory::Pyupgrade,
             CheckCode::U003 => CheckCategory::Pyupgrade,
@@ -646,6 +744,16 @@ impl CheckCode {
             CheckCode::N803 => CheckCategory::PEP8Naming,
             CheckCode::N804 => CheckCategory::PEP8Naming,
             CheckCode::N805 => CheckCategory::PEP8Naming,
+            CheckCode::N806 => CheckCategory::PEP8Naming,
+            CheckCode::N807 => CheckCategory::PEP8Naming,
+            CheckCode::N811 => CheckCategory::PEP8Naming,
+            CheckCode::N812 => CheckCategory::PEP8Naming,
+            CheckCode::N813 => CheckCategory::PEP8Naming,
+            CheckCode::N814 => CheckCategory::PEP8Naming,
+            CheckCode::N815 => CheckCategory::PEP8Naming,
+            CheckCode::N816 => CheckCategory::PEP8Naming,
+            CheckCode::N817 => CheckCategory::PEP8Naming,
+            CheckCode::N818 => CheckCategory::PEP8Naming,
             CheckCode::M001 => CheckCategory::Meta,
         }
     }
@@ -695,18 +803,24 @@ impl CheckKind {
             CheckKind::UndefinedExport(_) => &CheckCode::F822,
             CheckKind::UndefinedLocal(_) => &CheckCode::F823,
             CheckKind::UndefinedName(_) => &CheckCode::F821,
-            CheckKind::UnusedImport(_) => &CheckCode::F401,
+            CheckKind::UnusedImport(_, _) => &CheckCode::F401,
             CheckKind::UnusedVariable(_) => &CheckCode::F841,
             CheckKind::YieldOutsideFunction => &CheckCode::F704,
             // pycodestyle warnings
             CheckKind::NoNewLineAtEndOfFile => &CheckCode::W292,
+            CheckKind::InvalidEscapeSequence(_) => &CheckCode::W605,
             // flake8-builtins
             CheckKind::BuiltinVariableShadowing(_) => &CheckCode::A001,
             CheckKind::BuiltinArgumentShadowing(_) => &CheckCode::A002,
             CheckKind::BuiltinAttributeShadowing(_) => &CheckCode::A003,
             // flake8-bugbear
+            CheckKind::UnaryPrefixIncrement => &CheckCode::B002,
+            CheckKind::MutableArgumentDefault => &CheckCode::B006,
+            CheckKind::UnusedLoopControlVariable(_) => &CheckCode::B007,
             CheckKind::DoNotAssertFalse => &CheckCode::B011,
+            CheckKind::RedundantTupleInExceptionHandler(_) => &CheckCode::B013,
             CheckKind::DuplicateHandlerException(_) => &CheckCode::B014,
+            CheckKind::NoAssertRaisesException => &CheckCode::B017,
             CheckKind::DuplicateTryBlockException(_) => &CheckCode::B025,
             // flake8-comprehensions
             CheckKind::UnnecessaryGeneratorList => &CheckCode::C400,
@@ -728,6 +842,11 @@ impl CheckKind {
             // flake8-print
             CheckKind::PrintFound => &CheckCode::T201,
             CheckKind::PPrintFound => &CheckCode::T203,
+            // flake8-quotes
+            CheckKind::BadQuotesInlineString(_) => &CheckCode::Q000,
+            CheckKind::BadQuotesMultilineString(_) => &CheckCode::Q001,
+            CheckKind::BadQuotesDocstring(_) => &CheckCode::Q002,
+            CheckKind::AvoidQuoteEscape => &CheckCode::Q003,
             // pyupgrade
             CheckKind::TypeOfPrimitive(_) => &CheckCode::U003,
             CheckKind::UnnecessaryAbspath => &CheckCode::U002,
@@ -755,7 +874,7 @@ impl CheckKind {
             CheckKind::NewLineAfterLastParagraph => &CheckCode::D209,
             CheckKind::NewLineAfterSectionName(_) => &CheckCode::D406,
             CheckKind::NoBlankLineAfterFunction(_) => &CheckCode::D202,
-            CheckKind::NoBlankLineAfterSummary => &CheckCode::D205,
+            CheckKind::BlankLineAfterSummary => &CheckCode::D205,
             CheckKind::NoBlankLineBeforeClass(_) => &CheckCode::D211,
             CheckKind::NoBlankLineBeforeFunction(_) => &CheckCode::D201,
             CheckKind::NoBlankLinesBetweenHeaderAndContent(_) => &CheckCode::D412,
@@ -788,6 +907,16 @@ impl CheckKind {
             CheckKind::InvalidArgumentName(_) => &CheckCode::N803,
             CheckKind::InvalidFirstArgumentNameForClassMethod => &CheckCode::N804,
             CheckKind::InvalidFirstArgumentNameForMethod => &CheckCode::N805,
+            CheckKind::NonLowercaseVariableInFunction(..) => &CheckCode::N806,
+            CheckKind::DunderFunctionName => &CheckCode::N807,
+            CheckKind::ConstantImportedAsNonConstant(..) => &CheckCode::N811,
+            CheckKind::LowercaseImportedAsNonLowercase(..) => &CheckCode::N812,
+            CheckKind::CamelcaseImportedAsLowercase(..) => &CheckCode::N813,
+            CheckKind::CamelcaseImportedAsConstant(..) => &CheckCode::N814,
+            CheckKind::MixedCaseVariableInClassScope(..) => &CheckCode::N815,
+            CheckKind::MixedCaseVariableInGlobalScope(..) => &CheckCode::N816,
+            CheckKind::CamelcaseImportedAsAcronym(..) => &CheckCode::N817,
+            CheckKind::ErrorSuffixOnExceptionName(..) => &CheckCode::N818,
             // Meta
             CheckKind::UnusedNOQA(_) => &CheckCode::M001,
         }
@@ -914,18 +1043,23 @@ impl CheckKind {
             CheckKind::UndefinedName(name) => {
                 format!("Undefined name `{name}`")
             }
-            CheckKind::UnusedImport(names) => {
+            CheckKind::UnusedImport(names, in_init_py) => {
                 let names = names.iter().map(|name| format!("`{name}`")).join(", ");
-                format!("{names} imported but unused")
+                if *in_init_py {
+                    format!("{names} imported but unused and missing from `__all__`")
+                } else {
+                    format!("{names} imported but unused")
+                }
             }
             CheckKind::UnusedVariable(name) => {
                 format!("Local variable `{name}` is assigned to but never used")
             }
             CheckKind::YieldOutsideFunction => {
-                "`yield` or `yield from` statement outside of a function/method".to_string()
+                "`yield` or `yield from` statement outside of a function".to_string()
             }
             // pycodestyle warnings
             CheckKind::NoNewLineAtEndOfFile => "No newline at end of file".to_string(),
+            CheckKind::InvalidEscapeSequence(char) => format!("Invalid escape sequence: '\\{char}'"),
             // flake8-builtins
             CheckKind::BuiltinVariableShadowing(name) => {
                 format!("Variable `{name}` is shadowing a python builtin")
@@ -937,10 +1071,16 @@ impl CheckKind {
                 format!("Class attribute `{name}` is shadowing a python builtin")
             }
             // flake8-bugbear
+            CheckKind::UnaryPrefixIncrement => "Python does not support the unary prefix increment. Writing `++n` is equivalent to `+(+(n))`, which equals `n`. You meant `n += 1`.".to_string(),
+            CheckKind::MutableArgumentDefault => "Do not use mutable data structures for argument defaults.".to_string(),
+            CheckKind::UnusedLoopControlVariable(name) => format!("Loop control variable `{name}` not used within the loop body. If this is intended, start the name with an underscore."),
             CheckKind::DoNotAssertFalse => {
                 "Do not `assert False` (`python -O` removes these calls), raise `AssertionError()`"
                     .to_string()
             }
+            CheckKind::RedundantTupleInExceptionHandler(name) => {
+                format!("A length-one tuple literal is redundant. Write `except {name}:` instead of `except ({name},):`.")
+            }
             CheckKind::DuplicateHandlerException(names) => {
                 if names.len() == 1 {
                     let name = &names[0];
@@ -950,6 +1090,9 @@ impl CheckKind {
                     format!("Exception handler with duplicate exceptions: {names}")
                 }
             }
+            CheckKind::NoAssertRaisesException => {
+                "`assertRaises(Exception):` should be considered evil. It can lead to your test passing even if the code being tested is never executed due to a typo. Either assert for a more specific exception (builtin or custom), use `assertRaisesRegex`, or use the context manager form of `assertRaises`.".to_string()
+           }
             CheckKind::DuplicateTryBlockException(name) => {
                 format!("try-except block with duplicate exception `{name}`")
             }
@@ -1013,7 +1156,7 @@ impl CheckKind {
                 format!("Unnecessary subscript reversal of iterable within `{func}()`")
             }
             CheckKind::UnnecessaryComprehension(obj_type) => {
-                format!(" Unnecessary `{obj_type}` comprehension (rewrite using `{obj_type}()`)")
+                format!("Unnecessary `{obj_type}` comprehension (rewrite using `{obj_type}()`)")
             }
             CheckKind::UnnecessaryMap(obj_type) => {
                 if obj_type == "generator" {
@@ -1025,6 +1168,26 @@ impl CheckKind {
             // flake8-print
             CheckKind::PrintFound => "`print` found".to_string(),
             CheckKind::PPrintFound => "`pprint` found".to_string(),
+            // flake8-quotes
+            CheckKind::BadQuotesInlineString(quote) => {
+                match quote {
+                    Quote::Single => "Double quotes found but single quotes preferred".to_string(),
+                    Quote::Double => "Single quotes found but double quotes preferred".to_string(),
+                }
+            },
+            CheckKind::BadQuotesMultilineString(quote) => {
+                match quote {
+                    Quote::Single => "Double quote multiline found but single quotes preferred".to_string(),
+                    Quote::Double => "Single quote multiline found but double quotes preferred".to_string(),
+                }
+            },
+            CheckKind::BadQuotesDocstring(quote) => {
+                match quote {
+                    Quote::Single => "Double quote docstring found but single quotes preferred".to_string(),
+                    Quote::Double => "Single quote docstring found but double quotes preferred".to_string(),
+                }
+            },
+            CheckKind::AvoidQuoteEscape => "Change outer quotes to avoid escaping inner quotes".to_string(),
             // pyupgrade
             CheckKind::TypeOfPrimitive(primitive) => {
                 format!("Use `{}` instead of `type(...)`", primitive.builtin())
@@ -1034,7 +1197,7 @@ impl CheckKind {
             }
             CheckKind::UselessMetaclassType => "`__metaclass__ = type` is implied".to_string(),
             CheckKind::DeprecatedUnittestAlias(alias, target) => {
-                format!("`{}` is deprecated, use `{}` instead", alias, target)
+                format!("`{alias}` is deprecated, use `{target}` instead")
             }
             CheckKind::UselessObjectInheritance(name) => {
                 format!("Class `{name}` inherits from object")
@@ -1052,7 +1215,7 @@ impl CheckKind {
             }
             // pydocstyle
             CheckKind::FitsOnOneLine => "One-line docstring should fit on one line".to_string(),
-            CheckKind::NoBlankLineAfterSummary => {
+            CheckKind::BlankLineAfterSummary => {
                 "1 blank line required between summary line and description".to_string()
             }
             CheckKind::NewLineAfterLastParagraph => {
@@ -1078,7 +1241,7 @@ impl CheckKind {
                 "Multi-line docstring summary should start at the second line".to_string()
             }
             CheckKind::NoSignature => {
-                "First line should not be the function's 'signature'".to_string()
+                "First line should not be the function's signature".to_string()
             }
             CheckKind::NoBlankLineBeforeFunction(num_lines) => {
                 format!("No blank lines allowed before function docstring (found {num_lines})")
@@ -1104,10 +1267,10 @@ impl CheckKind {
             CheckKind::PublicNestedClass => "Missing docstring in public nested class".to_string(),
             CheckKind::PublicInit => "Missing docstring in `__init__`".to_string(),
             CheckKind::NoThisPrefix => {
-                "First word of the docstring should not be `This`".to_string()
+                "First word of the docstring should not be 'This'".to_string()
             }
             CheckKind::SkipDocstring => {
-                "Function decorated with @overload shouldn't contain a docstring".to_string()
+                "Function decorated with `@overload` shouldn't contain a docstring".to_string()
             }
             CheckKind::CapitalizeSectionName(name) => {
                 format!("Section name should be properly capitalized (\"{name}\")")
@@ -1178,6 +1341,36 @@ impl CheckKind {
             CheckKind::InvalidFirstArgumentNameForMethod => {
                 "First argument of a method should be named `self`".to_string()
             }
+            CheckKind::NonLowercaseVariableInFunction(name) => {
+                format!("Variable `{name}` in function should be lowercase")
+            }
+            CheckKind::DunderFunctionName => {
+                "Function name should not start and end with `__`".to_string()
+            }
+            CheckKind::ConstantImportedAsNonConstant(name, asname) => {
+                format!("Constant `{name}` imported as non-constant `{asname}`")
+            }
+            CheckKind::LowercaseImportedAsNonLowercase(name, asname) => {
+                format!("Lowercase `{name}` imported as non-lowercase `{asname}`")
+            }
+            CheckKind::CamelcaseImportedAsLowercase(name, asname) => {
+                format!("Camelcase `{name}` imported as lowercase `{asname}`")
+            }
+            CheckKind::CamelcaseImportedAsConstant(name, asname) => {
+                format!("Camelcase `{name}` imported as constant `{asname}`")
+            }
+            CheckKind::MixedCaseVariableInClassScope(name) => {
+                format!("Variable `{name}` in class scope should not be mixedCase")
+            }
+            CheckKind::MixedCaseVariableInGlobalScope(name) => {
+                format!("Variable `{name}` in global scope should not be mixedCase")
+            }
+            CheckKind::CamelcaseImportedAsAcronym(name, asname) => {
+                format!("Camelcase `{name}` imported as acronym `{asname}`")
+            }
+            CheckKind::ErrorSuffixOnExceptionName(name) => {
+                format!("Exception name `{name}` should be named with an Error suffix")
+            }
             // Meta
             CheckKind::UnusedNOQA(codes) => match codes {
                 None => "Unused `noqa` directive".to_string(),
@@ -1198,28 +1391,58 @@ impl CheckKind {
         }
     }
 
+    /// The summary text for the check. Typically a truncated form of the body text.
+    pub fn summary(&self) -> String {
+        match self {
+            CheckKind::UnaryPrefixIncrement => {
+                "Python does not support the unary prefix increment.".to_string()
+            }
+            CheckKind::UnusedLoopControlVariable(name) => {
+                format!("Loop control variable `{name}` not used within the loop body.")
+            }
+            CheckKind::NoAssertRaisesException => {
+                "`assertRaises(Exception):` should be considered evil.".to_string()
+            }
+            _ => self.body(),
+        }
+    }
+
     /// Whether the check kind is (potentially) fixable.
     pub fn fixable(&self) -> bool {
         matches!(
             self,
-            |CheckKind::BlankLineAfterLastSection(_)| CheckKind::BlankLineAfterSection(_)
+            CheckKind::BlankLineAfterLastSection(_)
+                | CheckKind::BlankLineAfterSection(_)
+                | CheckKind::BlankLineAfterSummary
+                | CheckKind::BlankLineBeforeSection(_)
+                | CheckKind::CapitalizeSectionName(_)
+                | CheckKind::DashedUnderlineAfterSection(_)
                 | CheckKind::DeprecatedUnittestAlias(_, _)
                 | CheckKind::DoNotAssertFalse
                 | CheckKind::DuplicateHandlerException(_)
                 | CheckKind::NewLineAfterLastParagraph
+                | CheckKind::NewLineAfterSectionName(_)
                 | CheckKind::NoBlankLineAfterFunction(_)
-                | CheckKind::NoBlankLineAfterSummary
                 | CheckKind::NoBlankLineBeforeClass(_)
                 | CheckKind::NoBlankLineBeforeFunction(_)
+                | CheckKind::NoBlankLinesBetweenHeaderAndContent(_)
+                | CheckKind::NoOverIndentation
                 | CheckKind::NoSurroundingWhitespace
+                | CheckKind::NoUnderIndentation
                 | CheckKind::OneBlankLineAfterClass(_)
                 | CheckKind::OneBlankLineBeforeClass(_)
                 | CheckKind::PPrintFound
                 | CheckKind::PrintFound
+                | CheckKind::SectionNameEndsInColon(_)
+                | CheckKind::SectionNotOverIndented(_)
+                | CheckKind::SectionUnderlineAfterName(_)
+                | CheckKind::SectionUnderlineMatchesSectionLength(_)
+                | CheckKind::SectionUnderlineNotOverIndented(_)
                 | CheckKind::SuperCallWithParameters
                 | CheckKind::TypeOfPrimitive(_)
                 | CheckKind::UnnecessaryAbspath
-                | CheckKind::UnusedImport(_)
+                | CheckKind::UnusedImport(_, false)
+                | CheckKind::UnusedLoopControlVariable(_)
                 | CheckKind::UnusedNOQA(_)
                 | CheckKind::UsePEP585Annotation(_)
                 | CheckKind::UsePEP604Annotation
@@ -1229,43 +1452,6 @@ impl CheckKind {
     }
 }
 
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
-pub struct Fix {
-    pub content: String,
-    pub location: Location,
-    pub end_location: Location,
-    pub applied: bool,
-}
-
-impl Fix {
-    pub fn deletion(start: Location, end: Location) -> Self {
-        Self {
-            content: "".to_string(),
-            location: start,
-            end_location: end,
-            applied: false,
-        }
-    }
-
-    pub fn replacement(content: String, start: Location, end: Location) -> Self {
-        Self {
-            content,
-            location: start,
-            end_location: end,
-            applied: false,
-        }
-    }
-
-    pub fn insertion(content: String, at: Location) -> Self {
-        Self {
-            content,
-            location: at,
-            end_location: at,
-            applied: false,
-        }
-    }
-}
-
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct Check {
     pub kind: CheckKind,
@@ -1275,11 +1461,11 @@ pub struct Check {
 }
 
 impl Check {
-    pub fn new(kind: CheckKind, rage: Range) -> Self {
+    pub fn new(kind: CheckKind, range: Range) -> Self {
         Self {
             kind,
-            location: rage.location,
-            end_location: rage.end_location,
+            location: range.location,
+            end_location: range.end_location,
             fix: None,
         }
     }

src/cli.rs

@@ -5,11 +5,11 @@ use clap::{command, Parser};
 use log::warn;
 use regex::Regex;
 
-use crate::checks::CheckCode;
+use crate::checks_gen::CheckCodePrefix;
 use crate::printer::SerializationFormat;
-use crate::pyproject::StrCheckCodePair;
-use crate::settings::PythonVersion;
-use crate::RawSettings;
+use crate::settings::configuration::Configuration;
+use crate::settings::types::PythonVersion;
+use crate::settings::types::StrCheckCodePair;
 
 #[derive(Debug, Parser)]
 #[command(author, about = "ruff: An extremely fast Python linter.")]
@@ -21,11 +21,14 @@ pub struct Cli {
     #[arg(long)]
     pub config: Option<PathBuf>,
     /// Enable verbose logging.
-    #[arg(short, long)]
+    #[arg(short, long, group = "verbosity")]
     pub verbose: bool,
-    /// Disable all logging (but still exit with status code "1" upon detecting errors).
-    #[arg(short, long)]
+    /// Only log errors.
+    #[arg(short, long, group = "verbosity")]
     pub quiet: bool,
+    /// Disable all logging (but still exit with status code "1" upon detecting errors).
+    #[arg(short, long, group = "verbosity")]
+    pub silent: bool,
     /// Exit with status code "0", even upon detecting errors.
     #[arg(short, long)]
     pub exit_zero: bool,
@@ -40,16 +43,16 @@ pub struct Cli {
     pub no_cache: bool,
     /// List of error codes to enable.
     #[arg(long, value_delimiter = ',')]
-    pub select: Vec<CheckCode>,
+    pub select: Vec<CheckCodePrefix>,
     /// Like --select, but adds additional error codes on top of the selected ones.
     #[arg(long, value_delimiter = ',')]
-    pub extend_select: Vec<CheckCode>,
+    pub extend_select: Vec<CheckCodePrefix>,
     /// List of error codes to ignore.
     #[arg(long, value_delimiter = ',')]
-    pub ignore: Vec<CheckCode>,
+    pub ignore: Vec<CheckCodePrefix>,
     /// Like --ignore, but adds additional error codes on top of the ignored ones.
     #[arg(long, value_delimiter = ',')]
-    pub extend_ignore: Vec<CheckCode>,
+    pub extend_ignore: Vec<CheckCodePrefix>,
     /// List of paths, used to exclude files and/or directories from checks.
     #[arg(long, value_delimiter = ',')]
     pub exclude: Vec<String>,
@@ -103,10 +106,10 @@ impl fmt::Display for Warnable {
 /// Warn the user if they attempt to enable a code that won't be respected.
 pub fn warn_on(
     flag: Warnable,
-    codes: &[CheckCode],
-    cli_ignore: &[CheckCode],
-    cli_extend_ignore: &[CheckCode],
-    pyproject_settings: &RawSettings,
+    codes: &[CheckCodePrefix],
+    cli_ignore: &[CheckCodePrefix],
+    cli_extend_ignore: &[CheckCodePrefix],
+    pyproject_configuration: &Configuration,
     pyproject_path: &Option<PathBuf>,
 ) {
     for code in codes {
@@ -114,7 +117,7 @@ pub fn warn_on(
             if cli_ignore.contains(code) {
                 warn!("{code:?} was passed to {flag}, but ignored via --ignore")
             }
-        } else if pyproject_settings.ignore.contains(code) {
+        } else if pyproject_configuration.ignore.contains(code) {
             if let Some(path) = pyproject_path {
                 warn!(
                     "{code:?} was passed to {flag}, but ignored by the `ignore` field in {}",
@@ -128,7 +131,7 @@ pub fn warn_on(
             if cli_extend_ignore.contains(code) {
                 warn!("{code:?} was passed to {flag}, but ignored via --extend-ignore")
             }
-        } else if pyproject_settings.extend_ignore.contains(code) {
+        } else if pyproject_configuration.extend_ignore.contains(code) {
             if let Some(path) = pyproject_path {
                 warn!(
                     "{code:?} was passed to {flag}, but ignored by the `extend_ignore` field in {}",

src/cst/helpers.rs

@@ -0,0 +1,42 @@
+use libcst_native::{Expression, NameOrAttribute};
+
+fn compose_call_path_inner<'a>(expr: &'a Expression, parts: &mut Vec<&'a str>) {
+    match &expr {
+        Expression::Call(expr) => {
+            compose_call_path_inner(&expr.func, parts);
+        }
+        Expression::Attribute(expr) => {
+            compose_call_path_inner(&expr.value, parts);
+            parts.push(expr.attr.value);
+        }
+        Expression::Name(expr) => {
+            parts.push(expr.value);
+        }
+        _ => {}
+    }
+}
+
+pub fn compose_call_path(expr: &Expression) -> Option<String> {
+    let mut segments = vec![];
+    compose_call_path_inner(expr, &mut segments);
+    if segments.is_empty() {
+        None
+    } else {
+        Some(segments.join("."))
+    }
+}
+
+pub fn compose_module_path(module: &NameOrAttribute) -> String {
+    match module {
+        NameOrAttribute::N(name) => name.value.to_string(),
+        NameOrAttribute::A(attr) => {
+            let name = attr.attr.value;
+            let prefix = compose_call_path(&attr.value);
+            if let Some(prefix) = prefix {
+                format!("{prefix}.{name}")
+            } else {
+                name.to_string()
+            }
+        }
+    }
+}

src/cst/mod.rs

@@ -0,0 +1 @@
+pub mod helpers;

src/docstrings.rs

@@ -1,8 +0,0 @@
-pub mod definition;
-pub mod extraction;
-mod google;
-mod helpers;
-mod numpy;
-pub mod plugins;
-pub mod sections;
-mod styles;

src/docstrings/google.rs

@@ -2,16 +2,7 @@
 
 use std::collections::BTreeSet;
 
-use crate::ast::types::Range;
 use once_cell::sync::Lazy;
-use regex::Regex;
-
-use crate::check_ast::Checker;
-use crate::checks::{Check, CheckCode, CheckKind};
-use crate::docstrings::definition::Definition;
-use crate::docstrings::sections;
-use crate::docstrings::sections::SectionContext;
-use crate::docstrings::styles::SectionStyle;
 
 pub(crate) static GOOGLE_SECTION_NAMES: Lazy<BTreeSet<&'static str>> = Lazy::new(|| {
     BTreeSet::from([
@@ -78,73 +69,3 @@ pub(crate) static LOWERCASE_GOOGLE_SECTION_NAMES: Lazy<BTreeSet<&'static str>> =
         "yields",
     ])
 });
-
-// See: `GOOGLE_ARGS_REGEX` in `pydocstyle/checker.py`.
-static GOOGLE_ARGS_REGEX: Lazy<Regex> =
-    Lazy::new(|| Regex::new(r"^\s*(\w+)\s*(\(.*?\))?\s*:\n?\s*.+").expect("Invalid regex"));
-
-fn check_args_section(checker: &mut Checker, definition: &Definition, context: &SectionContext) {
-    let mut args_sections: Vec<String> = vec![];
-    for line in textwrap::dedent(&context.following_lines.join("\n")).lines() {
-        if line
-            .chars()
-            .next()
-            .map(|char| char.is_whitespace())
-            .unwrap_or(true)
-        {
-            // This is a continuation of documentation for the last
-            // parameter because it does start with whitespace.
-            if let Some(current) = args_sections.last_mut() {
-                current.push_str(line);
-            }
-        } else {
-            // This line is the start of documentation for the next
-            // parameter because it doesn't start with any whitespace.
-            args_sections.push(line.to_string());
-        }
-    }
-
-    sections::check_missing_args(
-        checker,
-        definition,
-        // Collect the list of arguments documented in the docstring.
-        &BTreeSet::from_iter(args_sections.iter().filter_map(|section| {
-            match GOOGLE_ARGS_REGEX.captures(section.as_str()) {
-                Some(caps) => caps.get(1).map(|arg_name| arg_name.as_str()),
-                None => None,
-            }
-        })),
-    )
-}
-
-pub(crate) fn check_google_section(
-    checker: &mut Checker,
-    definition: &Definition,
-    context: &SectionContext,
-) {
-    sections::check_common_section(checker, definition, context, &SectionStyle::Google);
-
-    if checker.settings.enabled.contains(&CheckCode::D416) {
-        let suffix = context
-            .line
-            .trim()
-            .strip_prefix(&context.section_name)
-            .unwrap();
-        if suffix != ":" {
-            let docstring = definition
-                .docstring
-                .expect("Sections are only available for docstrings.");
-            checker.add_check(Check::new(
-                CheckKind::SectionNameEndsInColon(context.section_name.to_string()),
-                Range::from_located(docstring),
-            ))
-        }
-    }
-
-    if checker.settings.enabled.contains(&CheckCode::D417) {
-        let capitalized_section_name = titlecase::titlecase(&context.section_name);
-        if capitalized_section_name == "Args" || capitalized_section_name == "Arguments" {
-            check_args_section(checker, definition, context);
-        }
-    }
-}

src/docstrings/helpers.rs

@@ -25,10 +25,18 @@ pub fn leading_space(line: &str) -> String {
 }
 
 /// Extract the leading indentation from a docstring.
-pub fn indentation<'a>(checker: &'a mut Checker, docstring: &Expr) -> &'a str {
+pub fn indentation<'a>(checker: &'a Checker, docstring: &Expr) -> &'a str {
     let range = Range::from_located(docstring);
     checker.locator.slice_source_code_range(&Range {
-        location: Location::new(range.location.row(), 1),
+        location: Location::new(range.location.row(), 0),
         end_location: Location::new(range.location.row(), range.location.column()),
     })
 }
+
+/// Replace any non-whitespace characters from an indentation string.
+pub fn clean(indentation: &str) -> String {
+    indentation
+        .chars()
+        .map(|char| if char.is_whitespace() { char } else { ' ' })
+        .collect()
+}

src/docstrings/mod.rs

@@ -0,0 +1,7 @@
+pub mod definition;
+pub mod extraction;
+pub mod google;
+pub mod helpers;
+pub mod numpy;
+pub mod sections;
+pub mod styles;

src/docstrings/numpy.rs

@@ -2,16 +2,8 @@
 
 use std::collections::BTreeSet;
 
-use crate::ast::types::Range;
 use once_cell::sync::Lazy;
 
-use crate::check_ast::Checker;
-use crate::checks::{Check, CheckCode, CheckKind};
-use crate::docstrings::definition::Definition;
-use crate::docstrings::sections::SectionContext;
-use crate::docstrings::styles::SectionStyle;
-use crate::docstrings::{helpers, sections};
-
 pub(crate) static LOWERCASE_NUMPY_SECTION_NAMES: Lazy<BTreeSet<&'static str>> = Lazy::new(|| {
     BTreeSet::from([
         "short summary",
@@ -47,68 +39,3 @@ pub(crate) static NUMPY_SECTION_NAMES: Lazy<BTreeSet<&'static str>> = Lazy::new(
         "Methods",
     ])
 });
-
-fn check_parameters_section(
-    checker: &mut Checker,
-    definition: &Definition,
-    context: &SectionContext,
-) {
-    // Collect the list of arguments documented in the docstring.
-    let mut docstring_args: BTreeSet<&str> = Default::default();
-    let section_level_indent = helpers::leading_space(context.line);
-    for i in 1..context.following_lines.len() {
-        let current_line = context.following_lines[i - 1];
-        let current_leading_space = helpers::leading_space(current_line);
-        let next_line = context.following_lines[i];
-        if current_leading_space == section_level_indent
-            && (helpers::leading_space(next_line).len() > current_leading_space.len())
-            && !next_line.trim().is_empty()
-        {
-            let parameters = if let Some(semi_index) = current_line.find(':') {
-                // If the parameter has a type annotation, exclude it.
-                &current_line[..semi_index]
-            } else {
-                // Otherwise, it's just a list of parameters on the current line.
-                current_line.trim()
-            };
-            // Notably, NumPy lets you put multiple parameters of the same type on the same line.
-            for parameter in parameters.split(',') {
-                docstring_args.insert(parameter.trim());
-            }
-        }
-    }
-    // Validate that all arguments were documented.
-    sections::check_missing_args(checker, definition, &docstring_args);
-}
-
-pub(crate) fn check_numpy_section(
-    checker: &mut Checker,
-    definition: &Definition,
-    context: &SectionContext,
-) {
-    sections::check_common_section(checker, definition, context, &SectionStyle::NumPy);
-
-    if checker.settings.enabled.contains(&CheckCode::D406) {
-        let suffix = context
-            .line
-            .trim()
-            .strip_prefix(&context.section_name)
-            .unwrap();
-        if !suffix.is_empty() {
-            let docstring = definition
-                .docstring
-                .expect("Sections are only available for docstrings.");
-            checker.add_check(Check::new(
-                CheckKind::NewLineAfterSectionName(context.section_name.to_string()),
-                Range::from_located(docstring),
-            ))
-        }
-    }
-
-    if checker.settings.enabled.contains(&CheckCode::D417) {
-        let capitalized_section_name = titlecase::titlecase(&context.section_name);
-        if capitalized_section_name == "Parameters" {
-            check_parameters_section(checker, definition, context);
-        }
-    }
-}

src/docstrings/plugins.rs

@@ -1,826 +0,0 @@
-//! Abstractions for tracking and validating docstrings in Python code.
-
-use once_cell::sync::Lazy;
-use regex::Regex;
-use rustpython_ast::{Constant, ExprKind, Location, StmtKind};
-
-use crate::ast::types::Range;
-use crate::autofix::fixer;
-use crate::check_ast::Checker;
-use crate::checks::{Check, CheckCode, CheckKind, Fix};
-use crate::docstrings::definition::{Definition, DefinitionKind};
-use crate::docstrings::google::check_google_section;
-use crate::docstrings::helpers::{
-    indentation, leading_space, SINGLE_QUOTE_PREFIXES, TRIPLE_QUOTE_PREFIXES,
-};
-use crate::docstrings::numpy::check_numpy_section;
-use crate::docstrings::sections::section_contexts;
-use crate::docstrings::styles::SectionStyle;
-use crate::visibility::{is_init, is_magic, is_overload, Visibility};
-
-/// D100, D101, D102, D103, D104, D105, D106, D107
-pub fn not_missing(
-    checker: &mut Checker,
-    definition: &Definition,
-    visibility: &Visibility,
-) -> bool {
-    if matches!(visibility, Visibility::Private) {
-        return true;
-    }
-
-    if definition.docstring.is_some() {
-        return true;
-    }
-
-    match definition.kind {
-        DefinitionKind::Module => {
-            if checker.settings.enabled.contains(&CheckCode::D100) {
-                checker.add_check(Check::new(
-                    CheckKind::PublicModule,
-                    Range {
-                        location: Location::new(1, 1),
-                        end_location: Location::new(1, 1),
-                    },
-                ));
-            }
-            false
-        }
-        DefinitionKind::Package => {
-            if checker.settings.enabled.contains(&CheckCode::D104) {
-                checker.add_check(Check::new(
-                    CheckKind::PublicPackage,
-                    Range {
-                        location: Location::new(1, 1),
-                        end_location: Location::new(1, 1),
-                    },
-                ));
-            }
-            false
-        }
-        DefinitionKind::Class(stmt) => {
-            if checker.settings.enabled.contains(&CheckCode::D101) {
-                checker.add_check(Check::new(
-                    CheckKind::PublicClass,
-                    Range::from_located(stmt),
-                ));
-            }
-            false
-        }
-        DefinitionKind::NestedClass(stmt) => {
-            if checker.settings.enabled.contains(&CheckCode::D106) {
-                checker.add_check(Check::new(
-                    CheckKind::PublicNestedClass,
-                    Range::from_located(stmt),
-                ));
-            }
-            false
-        }
-        DefinitionKind::Function(stmt) | DefinitionKind::NestedFunction(stmt) => {
-            if is_overload(stmt) {
-                true
-            } else {
-                if checker.settings.enabled.contains(&CheckCode::D103) {
-                    checker.add_check(Check::new(
-                        CheckKind::PublicFunction,
-                        Range::from_located(stmt),
-                    ));
-                }
-                false
-            }
-        }
-        DefinitionKind::Method(stmt) => {
-            if is_overload(stmt) {
-                true
-            } else if is_magic(stmt) {
-                if checker.settings.enabled.contains(&CheckCode::D105) {
-                    checker.add_check(Check::new(
-                        CheckKind::MagicMethod,
-                        Range::from_located(stmt),
-                    ));
-                }
-                true
-            } else if is_init(stmt) {
-                if checker.settings.enabled.contains(&CheckCode::D107) {
-                    checker.add_check(Check::new(CheckKind::PublicInit, Range::from_located(stmt)));
-                }
-                true
-            } else {
-                if checker.settings.enabled.contains(&CheckCode::D102) {
-                    checker.add_check(Check::new(
-                        CheckKind::PublicMethod,
-                        Range::from_located(stmt),
-                    ));
-                }
-                true
-            }
-        }
-    }
-}
-
-/// D200
-pub fn one_liner(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = &definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            let mut line_count = 0;
-            let mut non_empty_line_count = 0;
-            for line in string.lines() {
-                line_count += 1;
-                if !line.trim().is_empty() {
-                    non_empty_line_count += 1;
-                }
-                if non_empty_line_count > 1 {
-                    break;
-                }
-            }
-
-            if non_empty_line_count == 1 && line_count > 1 {
-                checker.add_check(Check::new(
-                    CheckKind::FitsOnOneLine,
-                    Range::from_located(docstring),
-                ));
-            }
-        }
-    }
-}
-
-static COMMENT_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"^\s*#").unwrap());
-
-static INNER_FUNCTION_OR_CLASS_REGEX: Lazy<Regex> =
-    Lazy::new(|| Regex::new(r"^\s+(?:(?:class|def|async def)\s|@)").unwrap());
-
-/// D201, D202
-pub fn blank_before_after_function(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let DefinitionKind::Function(parent)
-        | DefinitionKind::NestedFunction(parent)
-        | DefinitionKind::Method(parent) = &definition.kind
-        {
-            if let ExprKind::Constant {
-                value: Constant::Str(_),
-                ..
-            } = &docstring.node
-            {
-                let (before, _, after) = checker.locator.partition_source_code_at(
-                    &Range::from_located(parent),
-                    &Range::from_located(docstring),
-                );
-
-                if checker.settings.enabled.contains(&CheckCode::D201) {
-                    let blank_lines_before = before
-                        .lines()
-                        .rev()
-                        .skip(1)
-                        .take_while(|line| line.trim().is_empty())
-                        .count();
-                    if blank_lines_before != 0 {
-                        let mut check = Check::new(
-                            CheckKind::NoBlankLineBeforeFunction(blank_lines_before),
-                            Range::from_located(docstring),
-                        );
-                        if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
-                            check.amend(Fix::deletion(
-                                Location::new(docstring.location.row() - blank_lines_before, 1),
-                                Location::new(docstring.location.row(), 1),
-                            ));
-                        }
-                        checker.add_check(check);
-                    }
-                }
-
-                if checker.settings.enabled.contains(&CheckCode::D202) {
-                    let all_blank_after = after
-                        .lines()
-                        .skip(1)
-                        .all(|line| line.trim().is_empty() || COMMENT_REGEX.is_match(line));
-                    if all_blank_after {
-                        return;
-                    }
-
-                    let blank_lines_after = after
-                        .lines()
-                        .skip(1)
-                        .take_while(|line| line.trim().is_empty())
-                        .count();
-                    // Report a D202 violation if the docstring is followed by a blank line and the
-                    // blank line is not itself followed by an inner function or class.
-                    let expected_blank_lines_after =
-                        if INNER_FUNCTION_OR_CLASS_REGEX.is_match(after) {
-                            1
-                        } else {
-                            0
-                        };
-                    if blank_lines_after != expected_blank_lines_after {
-                        let mut check = Check::new(
-                            CheckKind::NoBlankLineAfterFunction(blank_lines_after),
-                            Range::from_located(docstring),
-                        );
-                        if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
-                            check.amend(Fix::deletion(
-                                Location::new(
-                                    docstring.location.row() + 1 + expected_blank_lines_after,
-                                    1,
-                                ),
-                                Location::new(docstring.location.row() + 1 + blank_lines_after, 1),
-                            ));
-                        }
-                        checker.add_check(check);
-                    }
-                }
-            }
-        }
-    }
-}
-
-/// D203, D204, D211
-pub fn blank_before_after_class(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = &definition.docstring {
-        if let DefinitionKind::Class(parent) | DefinitionKind::NestedClass(parent) =
-            &definition.kind
-        {
-            if let ExprKind::Constant {
-                value: Constant::Str(_),
-                ..
-            } = &docstring.node
-            {
-                let (before, _, after) = checker.locator.partition_source_code_at(
-                    &Range::from_located(parent),
-                    &Range::from_located(docstring),
-                );
-
-                if checker.settings.enabled.contains(&CheckCode::D203)
-                    || checker.settings.enabled.contains(&CheckCode::D211)
-                {
-                    let blank_lines_before = before
-                        .lines()
-                        .rev()
-                        .skip(1)
-                        .take_while(|line| line.trim().is_empty())
-                        .count();
-                    if checker.settings.enabled.contains(&CheckCode::D211) {
-                        if blank_lines_before != 0 {
-                            let mut check = Check::new(
-                                CheckKind::NoBlankLineBeforeClass(blank_lines_before),
-                                Range::from_located(docstring),
-                            );
-                            if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply)
-                            {
-                                check.amend(Fix::deletion(
-                                    Location::new(docstring.location.row() - blank_lines_before, 1),
-                                    Location::new(docstring.location.row(), 1),
-                                ));
-                            }
-                            checker.add_check(check);
-                        }
-                    }
-                    if checker.settings.enabled.contains(&CheckCode::D203) {
-                        if blank_lines_before != 1 {
-                            let mut check = Check::new(
-                                CheckKind::OneBlankLineBeforeClass(blank_lines_before),
-                                Range::from_located(docstring),
-                            );
-                            if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply)
-                            {
-                                check.amend(Fix::replacement(
-                                    "\n".to_string(),
-                                    Location::new(docstring.location.row() - blank_lines_before, 1),
-                                    Location::new(docstring.location.row(), 1),
-                                ));
-                            }
-                            checker.add_check(check);
-                        }
-                    }
-                }
-
-                if checker.settings.enabled.contains(&CheckCode::D204) {
-                    let all_blank_after = after
-                        .lines()
-                        .skip(1)
-                        .all(|line| line.trim().is_empty() || COMMENT_REGEX.is_match(line));
-                    if all_blank_after {
-                        return;
-                    }
-
-                    let blank_lines_after = after
-                        .lines()
-                        .skip(1)
-                        .take_while(|line| line.trim().is_empty())
-                        .count();
-                    if blank_lines_after != 1 {
-                        let mut check = Check::new(
-                            CheckKind::OneBlankLineAfterClass(blank_lines_after),
-                            Range::from_located(docstring),
-                        );
-                        if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
-                            check.amend(Fix::replacement(
-                                "\n".to_string(),
-                                Location::new(docstring.end_location.row() + 1, 1),
-                                Location::new(
-                                    docstring.end_location.row() + 1 + blank_lines_after,
-                                    1,
-                                ),
-                            ));
-                        }
-                        checker.add_check(check);
-                    }
-                }
-            }
-        }
-    }
-}
-
-/// D205
-pub fn blank_after_summary(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            let mut lines_count = 1;
-            let mut blanks_count = 0;
-            for line in string.trim().lines().skip(1) {
-                lines_count += 1;
-                if line.trim().is_empty() {
-                    blanks_count += 1;
-                } else {
-                    break;
-                }
-            }
-            if lines_count > 1 && blanks_count != 1 {
-                let mut check = Check::new(
-                    CheckKind::NoBlankLineAfterSummary,
-                    Range::from_located(docstring),
-                );
-                if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
-                    check.amend(Fix::replacement(
-                        "\n".to_string(),
-                        Location::new(docstring.location.row() + 1, 1),
-                        Location::new(docstring.location.row() + 1 + blanks_count, 1),
-                    ));
-                }
-                checker.add_check(check);
-            }
-        }
-    }
-}
-
-/// D206, D207, D208
-pub fn indent(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            let lines: Vec<&str> = string.lines().collect();
-            if lines.len() <= 1 {
-                return;
-            }
-
-            let mut has_seen_tab = false;
-            let mut has_seen_over_indent = false;
-            let mut has_seen_under_indent = false;
-
-            let docstring_indent = indentation(checker, docstring).to_string();
-            if !has_seen_tab {
-                if docstring_indent.contains('\t') {
-                    if checker.settings.enabled.contains(&CheckCode::D206) {
-                        checker.add_check(Check::new(
-                            CheckKind::IndentWithSpaces,
-                            Range::from_located(docstring),
-                        ));
-                    }
-                    has_seen_tab = true;
-                }
-            }
-
-            for i in 0..lines.len() {
-                // First lines and continuations doesn't need any indentation.
-                if i == 0 || lines[i - 1].ends_with('\\') {
-                    continue;
-                }
-
-                // Omit empty lines, except for the last line, which is non-empty by way of
-                // containing the closing quotation marks.
-                if i < lines.len() - 1 && lines[i].trim().is_empty() {
-                    continue;
-                }
-
-                let line_indent = leading_space(lines[i]);
-                if !has_seen_tab {
-                    if line_indent.contains('\t') {
-                        if checker.settings.enabled.contains(&CheckCode::D206) {
-                            checker.add_check(Check::new(
-                                CheckKind::IndentWithSpaces,
-                                Range::from_located(docstring),
-                            ));
-                        }
-                        has_seen_tab = true;
-                    }
-                }
-
-                if !has_seen_over_indent {
-                    if line_indent.len() > docstring_indent.len() {
-                        if checker.settings.enabled.contains(&CheckCode::D208) {
-                            checker.add_check(Check::new(
-                                CheckKind::NoOverIndentation,
-                                Range::from_located(docstring),
-                            ));
-                        }
-                        has_seen_over_indent = true;
-                    }
-                }
-
-                if !has_seen_under_indent {
-                    if line_indent.len() < docstring_indent.len() {
-                        if checker.settings.enabled.contains(&CheckCode::D207) {
-                            checker.add_check(Check::new(
-                                CheckKind::NoUnderIndentation,
-                                Range::from_located(docstring),
-                            ));
-                        }
-                        has_seen_under_indent = true;
-                    }
-                }
-            }
-        }
-    }
-}
-
-/// D209
-pub fn newline_after_last_paragraph(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            let mut line_count = 0;
-            for line in string.lines() {
-                if !line.trim().is_empty() {
-                    line_count += 1;
-                }
-                if line_count > 1 {
-                    let content = checker
-                        .locator
-                        .slice_source_code_range(&Range::from_located(docstring));
-                    if let Some(last_line) = content.lines().last().map(|line| line.trim()) {
-                        if last_line != "\"\"\"" && last_line != "'''" {
-                            let mut check = Check::new(
-                                CheckKind::NewLineAfterLastParagraph,
-                                Range::from_located(docstring),
-                            );
-                            if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply)
-                            {
-                                // Insert a newline just before the end-quote(s).
-                                let mut content = "\n".to_string();
-                                content.push_str(indentation(checker, docstring));
-                                check.amend(Fix::insertion(
-                                    content,
-                                    Location::new(
-                                        docstring.end_location.row(),
-                                        docstring.end_location.column() - "\"\"\"".len(),
-                                    ),
-                                ));
-                            }
-                            checker.add_check(check);
-                        }
-                    }
-                    return;
-                }
-            }
-        }
-    }
-}
-
-/// D210
-pub fn no_surrounding_whitespace(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            let mut lines = string.lines();
-            if let Some(line) = lines.next() {
-                let trimmed = line.trim();
-                if trimmed.is_empty() {
-                    return;
-                }
-                if line != trimmed {
-                    let mut check = Check::new(
-                        CheckKind::NoSurroundingWhitespace,
-                        Range::from_located(docstring),
-                    );
-                    if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
-                        if let Some(first_line) = checker
-                            .locator
-                            .slice_source_code_range(&Range::from_located(docstring))
-                            .lines()
-                            .next()
-                            .map(|line| line.to_lowercase())
-                        {
-                            for pattern in TRIPLE_QUOTE_PREFIXES.iter().chain(SINGLE_QUOTE_PREFIXES)
-                            {
-                                if first_line.starts_with(pattern) {
-                                    check.amend(Fix::replacement(
-                                        trimmed.to_string(),
-                                        Location::new(
-                                            docstring.location.row(),
-                                            docstring.location.column() + pattern.len(),
-                                        ),
-                                        Location::new(
-                                            docstring.location.row(),
-                                            docstring.location.column()
-                                                + pattern.len()
-                                                + line.chars().count(),
-                                        ),
-                                    ));
-                                    break;
-                                }
-                            }
-                        }
-                    }
-                    checker.add_check(check);
-                }
-            }
-        }
-    }
-}
-
-/// D212, D213
-pub fn multi_line_summary_start(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            if string.lines().nth(1).is_some() {
-                if let Some(first_line) = checker
-                    .locator
-                    .slice_source_code_range(&Range::from_located(docstring))
-                    .lines()
-                    .next()
-                    .map(|line| line.to_lowercase())
-                {
-                    if TRIPLE_QUOTE_PREFIXES.contains(&first_line.as_str()) {
-                        if checker.settings.enabled.contains(&CheckCode::D212) {
-                            checker.add_check(Check::new(
-                                CheckKind::MultiLineSummaryFirstLine,
-                                Range::from_located(docstring),
-                            ));
-                        }
-                    } else {
-                        if checker.settings.enabled.contains(&CheckCode::D213) {
-                            checker.add_check(Check::new(
-                                CheckKind::MultiLineSummarySecondLine,
-                                Range::from_located(docstring),
-                            ));
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
-
-/// D300
-pub fn triple_quotes(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            if let Some(first_line) = checker
-                .locator
-                .slice_source_code_range(&Range::from_located(docstring))
-                .lines()
-                .next()
-                .map(|line| line.to_lowercase())
-            {
-                let starts_with_triple = if string.contains("\"\"\"") {
-                    first_line.starts_with("'''")
-                        || first_line.starts_with("u'''")
-                        || first_line.starts_with("r'''")
-                        || first_line.starts_with("ur'''")
-                } else {
-                    first_line.starts_with("\"\"\"")
-                        || first_line.starts_with("u\"\"\"")
-                        || first_line.starts_with("r\"\"\"")
-                        || first_line.starts_with("ur\"\"\"")
-                };
-                if !starts_with_triple {
-                    checker.add_check(Check::new(
-                        CheckKind::UsesTripleQuotes,
-                        Range::from_located(docstring),
-                    ));
-                }
-            }
-        }
-    }
-}
-
-/// D400
-pub fn ends_with_period(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            if let Some(string) = string.lines().next() {
-                if !string.ends_with('.') {
-                    checker.add_check(Check::new(
-                        CheckKind::EndsInPeriod,
-                        Range::from_located(docstring),
-                    ));
-                }
-            }
-        }
-    }
-}
-
-/// D402
-pub fn no_signature(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let DefinitionKind::Function(parent)
-        | DefinitionKind::NestedFunction(parent)
-        | DefinitionKind::Method(parent) = definition.kind
-        {
-            if let StmtKind::FunctionDef { name, .. } = &parent.node {
-                if let ExprKind::Constant {
-                    value: Constant::Str(string),
-                    ..
-                } = &docstring.node
-                {
-                    if let Some(first_line) = string.lines().next() {
-                        if first_line.contains(&format!("{name}(")) {
-                            checker.add_check(Check::new(
-                                CheckKind::NoSignature,
-                                Range::from_located(docstring),
-                            ));
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
-
-/// D403
-pub fn capitalized(checker: &mut Checker, definition: &Definition) {
-    if !matches!(definition.kind, DefinitionKind::Function(_)) {
-        return;
-    }
-
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            if let Some(first_word) = string.split(' ').next() {
-                if first_word == first_word.to_uppercase() {
-                    return;
-                }
-                for char in first_word.chars() {
-                    if !char.is_ascii_alphabetic() && char != '\'' {
-                        return;
-                    }
-                }
-                if let Some(first_char) = first_word.chars().next() {
-                    if !first_char.is_uppercase() {
-                        checker.add_check(Check::new(
-                            CheckKind::FirstLineCapitalized,
-                            Range::from_located(docstring),
-                        ));
-                    }
-                }
-            }
-        }
-    }
-}
-
-/// D404
-pub fn starts_with_this(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            let trimmed = string.trim();
-            if trimmed.is_empty() {
-                return;
-            }
-
-            if let Some(first_word) = string.split(' ').next() {
-                if first_word
-                    .replace(|c: char| !c.is_alphanumeric(), "")
-                    .to_lowercase()
-                    == "this"
-                {
-                    checker.add_check(Check::new(
-                        CheckKind::NoThisPrefix,
-                        Range::from_located(docstring),
-                    ));
-                }
-            }
-        }
-    }
-}
-
-/// D415
-pub fn ends_with_punctuation(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            if let Some(string) = string.lines().next() {
-                if !(string.ends_with('.') || string.ends_with('!') || string.ends_with('?')) {
-                    checker.add_check(Check::new(
-                        CheckKind::EndsInPunctuation,
-                        Range::from_located(docstring),
-                    ));
-                }
-            }
-        }
-    }
-}
-
-/// D418
-pub fn if_needed(checker: &mut Checker, definition: &Definition) {
-    if definition.docstring.is_some() {
-        if let DefinitionKind::Function(stmt)
-        | DefinitionKind::NestedFunction(stmt)
-        | DefinitionKind::Method(stmt) = definition.kind
-        {
-            if is_overload(stmt) {
-                checker.add_check(Check::new(
-                    CheckKind::SkipDocstring,
-                    Range::from_located(stmt),
-                ));
-            }
-        }
-    }
-}
-
-/// D419
-pub fn not_empty(checker: &mut Checker, definition: &Definition) -> bool {
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            if string.trim().is_empty() {
-                if checker.settings.enabled.contains(&CheckCode::D419) {
-                    checker.add_check(Check::new(
-                        CheckKind::NonEmpty,
-                        Range::from_located(docstring),
-                    ));
-                }
-                return false;
-            }
-        }
-    }
-    true
-}
-
-/// D212, D214, D215, D405, D406, D407, D408, D409, D410, D411, D412, D413, D414, D416, D417
-pub fn sections(checker: &mut Checker, definition: &Definition) {
-    if let Some(docstring) = definition.docstring {
-        if let ExprKind::Constant {
-            value: Constant::Str(string),
-            ..
-        } = &docstring.node
-        {
-            let lines: Vec<&str> = string.lines().collect();
-            if lines.len() < 2 {
-                return;
-            }
-
-            // First, interpret as NumPy-style sections.
-            let mut found_numpy_section = false;
-            for context in &section_contexts(&lines, &SectionStyle::NumPy) {
-                found_numpy_section = true;
-                check_numpy_section(checker, definition, context);
-            }
-
-            // If no such sections were identified, interpret as Google-style sections.
-            if !found_numpy_section {
-                for context in &section_contexts(&lines, &SectionStyle::Google) {
-                    check_google_section(checker, definition, context);
-                }
-            }
-        }
-    }
-}

src/docstrings/sections.rs

@@ -1,17 +1,5 @@
-use std::collections::BTreeSet;
-
-use itertools::Itertools;
-use rustpython_ast::{Arg, Location, StmtKind};
-use titlecase::titlecase;
-
-use crate::ast::types::Range;
-use crate::autofix::fixer;
-use crate::check_ast::Checker;
-use crate::checks::{Check, CheckCode, CheckKind, Fix};
-use crate::docstrings::definition::{Definition, DefinitionKind};
 use crate::docstrings::helpers;
 use crate::docstrings::styles::SectionStyle;
-use crate::visibility::is_static;
 
 #[derive(Debug)]
 pub(crate) struct SectionContext<'a> {
@@ -20,7 +8,7 @@ pub(crate) struct SectionContext<'a> {
     pub(crate) line: &'a str,
     pub(crate) following_lines: &'a [&'a str],
     pub(crate) is_last_section: bool,
-    original_index: usize,
+    pub(crate) original_index: usize,
 }
 
 fn suspected_as_section(line: &str, style: &SectionStyle) -> bool {
@@ -109,295 +97,3 @@ pub(crate) fn section_contexts<'a>(
     truncated_contexts.reverse();
     truncated_contexts
 }
-
-fn check_blanks_and_section_underline(
-    checker: &mut Checker,
-    definition: &Definition,
-    context: &SectionContext,
-) {
-    let docstring = definition
-        .docstring
-        .expect("Sections are only available for docstrings.");
-
-    let mut blank_lines_after_header = 0;
-    for line in context.following_lines {
-        if !line.trim().is_empty() {
-            break;
-        }
-        blank_lines_after_header += 1;
-    }
-
-    // Nothing but blank lines after the section header.
-    if blank_lines_after_header == context.following_lines.len() {
-        if checker.settings.enabled.contains(&CheckCode::D407) {
-            checker.add_check(Check::new(
-                CheckKind::DashedUnderlineAfterSection(context.section_name.to_string()),
-                Range::from_located(docstring),
-            ));
-        }
-        if checker.settings.enabled.contains(&CheckCode::D414) {
-            checker.add_check(Check::new(
-                CheckKind::NonEmptySection(context.section_name.to_string()),
-                Range::from_located(docstring),
-            ));
-        }
-        return;
-    }
-
-    let non_empty_line = context.following_lines[blank_lines_after_header];
-    let dash_line_found = non_empty_line
-        .chars()
-        .all(|char| char.is_whitespace() || char == '-');
-
-    if !dash_line_found {
-        if checker.settings.enabled.contains(&CheckCode::D407) {
-            checker.add_check(Check::new(
-                CheckKind::DashedUnderlineAfterSection(context.section_name.to_string()),
-                Range::from_located(docstring),
-            ));
-        }
-        if blank_lines_after_header > 0 {
-            if checker.settings.enabled.contains(&CheckCode::D212) {
-                checker.add_check(Check::new(
-                    CheckKind::NoBlankLinesBetweenHeaderAndContent(
-                        context.section_name.to_string(),
-                    ),
-                    Range::from_located(docstring),
-                ));
-            }
-        }
-    } else {
-        if blank_lines_after_header > 0 {
-            if checker.settings.enabled.contains(&CheckCode::D408) {
-                checker.add_check(Check::new(
-                    CheckKind::SectionUnderlineAfterName(context.section_name.to_string()),
-                    Range::from_located(docstring),
-                ));
-            }
-        }
-
-        if non_empty_line
-            .trim()
-            .chars()
-            .filter(|char| *char == '-')
-            .count()
-            != context.section_name.len()
-        {
-            if checker.settings.enabled.contains(&CheckCode::D409) {
-                checker.add_check(Check::new(
-                    CheckKind::SectionUnderlineMatchesSectionLength(
-                        context.section_name.to_string(),
-                    ),
-                    Range::from_located(docstring),
-                ));
-            }
-        }
-
-        if checker.settings.enabled.contains(&CheckCode::D215) {
-            if helpers::leading_space(non_empty_line).len()
-                > helpers::indentation(checker, docstring).len()
-            {
-                checker.add_check(Check::new(
-                    CheckKind::SectionUnderlineNotOverIndented(context.section_name.to_string()),
-                    Range::from_located(docstring),
-                ));
-            }
-        }
-
-        let line_after_dashes_index = blank_lines_after_header + 1;
-
-        if line_after_dashes_index < context.following_lines.len() {
-            let line_after_dashes = context.following_lines[line_after_dashes_index];
-            if line_after_dashes.trim().is_empty() {
-                let rest_of_lines = &context.following_lines[line_after_dashes_index..];
-                if rest_of_lines.iter().all(|line| line.trim().is_empty()) {
-                    if checker.settings.enabled.contains(&CheckCode::D414) {
-                        checker.add_check(Check::new(
-                            CheckKind::NonEmptySection(context.section_name.to_string()),
-                            Range::from_located(docstring),
-                        ));
-                    }
-                } else {
-                    if checker.settings.enabled.contains(&CheckCode::D412) {
-                        checker.add_check(Check::new(
-                            CheckKind::NoBlankLinesBetweenHeaderAndContent(
-                                context.section_name.to_string(),
-                            ),
-                            Range::from_located(docstring),
-                        ));
-                    }
-                }
-            }
-        } else {
-            if checker.settings.enabled.contains(&CheckCode::D414) {
-                checker.add_check(Check::new(
-                    CheckKind::NonEmptySection(context.section_name.to_string()),
-                    Range::from_located(docstring),
-                ));
-            }
-        }
-    }
-}
-
-pub(crate) fn check_common_section(
-    checker: &mut Checker,
-    definition: &Definition,
-    context: &SectionContext,
-    style: &SectionStyle,
-) {
-    let docstring = definition
-        .docstring
-        .expect("Sections are only available for docstrings.");
-
-    if checker.settings.enabled.contains(&CheckCode::D405) {
-        if !style
-            .section_names()
-            .contains(&context.section_name.as_str())
-            && style
-                .section_names()
-                .contains(titlecase(&context.section_name).as_str())
-        {
-            checker.add_check(Check::new(
-                CheckKind::CapitalizeSectionName(context.section_name.to_string()),
-                Range::from_located(docstring),
-            ))
-        }
-    }
-
-    if checker.settings.enabled.contains(&CheckCode::D214) {
-        if helpers::leading_space(context.line).len()
-            > helpers::indentation(checker, docstring).len()
-        {
-            checker.add_check(Check::new(
-                CheckKind::SectionNotOverIndented(context.section_name.to_string()),
-                Range::from_located(docstring),
-            ))
-        }
-    }
-
-    if context
-        .following_lines
-        .last()
-        .map(|line| !line.trim().is_empty())
-        .unwrap_or(true)
-    {
-        if context.is_last_section {
-            if checker.settings.enabled.contains(&CheckCode::D413) {
-                let mut check = Check::new(
-                    CheckKind::BlankLineAfterLastSection(context.section_name.to_string()),
-                    Range::from_located(docstring),
-                );
-                if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
-                    check.amend(Fix::insertion(
-                        "\n".to_string(),
-                        Location::new(
-                            docstring.location.row()
-                                + context.original_index
-                                + 1
-                                + context.following_lines.len(),
-                            1,
-                        ),
-                    ))
-                }
-                checker.add_check(check);
-            }
-        } else {
-            if checker.settings.enabled.contains(&CheckCode::D410) {
-                let mut check = Check::new(
-                    CheckKind::BlankLineAfterSection(context.section_name.to_string()),
-                    Range::from_located(docstring),
-                );
-                if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
-                    check.amend(Fix::insertion(
-                        "\n".to_string(),
-                        Location::new(
-                            docstring.location.row()
-                                + context.original_index
-                                + 1
-                                + context.following_lines.len(),
-                            1,
-                        ),
-                    ))
-                }
-                checker.add_check(check);
-            }
-        }
-    }
-
-    if checker.settings.enabled.contains(&CheckCode::D411) {
-        if !context.previous_line.is_empty() {
-            checker.add_check(Check::new(
-                CheckKind::BlankLineBeforeSection(context.section_name.to_string()),
-                Range::from_located(docstring),
-            ))
-        }
-    }
-
-    check_blanks_and_section_underline(checker, definition, context);
-}
-
-pub(crate) fn check_missing_args(
-    checker: &mut Checker,
-    definition: &Definition,
-    docstrings_args: &BTreeSet<&str>,
-) {
-    if let DefinitionKind::Function(parent)
-    | DefinitionKind::NestedFunction(parent)
-    | DefinitionKind::Method(parent) = definition.kind
-    {
-        if let StmtKind::FunctionDef {
-            args: arguments, ..
-        }
-        | StmtKind::AsyncFunctionDef {
-            args: arguments, ..
-        } = &parent.node
-        {
-            // Collect all the arguments into a single vector.
-            let mut all_arguments: Vec<&Arg> = arguments
-                .args
-                .iter()
-                .chain(arguments.posonlyargs.iter())
-                .chain(arguments.kwonlyargs.iter())
-                .skip(
-                    // If this is a non-static method, skip `cls` or `self`.
-                    if matches!(definition.kind, DefinitionKind::Method(_)) && !is_static(parent) {
-                        1
-                    } else {
-                        0
-                    },
-                )
-                .collect();
-            if let Some(arg) = &arguments.vararg {
-                all_arguments.push(arg);
-            }
-            if let Some(arg) = &arguments.kwarg {
-                all_arguments.push(arg);
-            }
-
-            // Look for arguments that weren't included in the docstring.
-            let mut missing_args: BTreeSet<&str> = Default::default();
-            for arg in all_arguments {
-                let arg_name = arg.node.arg.as_str();
-                if arg_name.starts_with('_') {
-                    continue;
-                }
-                if docstrings_args.contains(&arg_name) {
-                    continue;
-                }
-                missing_args.insert(arg_name);
-            }
-
-            if !missing_args.is_empty() {
-                let names = missing_args
-                    .into_iter()
-                    .map(String::from)
-                    .sorted()
-                    .collect();
-                checker.add_check(Check::new(
-                    CheckKind::DocumentAllArguments(names),
-                    Range::from_located(parent),
-                ));
-            }
-        }
-    }
-}

src/flake8_bugbear/mod.rs

@@ -0,0 +1 @@
+pub mod plugins;

src/flake8_bugbear/plugins/assert_false.rs

@@ -1,9 +1,9 @@
 use rustpython_ast::{Constant, Expr, ExprContext, ExprKind, Stmt, StmtKind};
 
 use crate::ast::types::Range;
-use crate::autofix::fixer;
+use crate::autofix::Fix;
 use crate::check_ast::Checker;
-use crate::checks::{Check, CheckKind, Fix};
+use crate::checks::{Check, CheckKind};
 use crate::code_gen::SourceGenerator;
 
 fn assertion_error(msg: &Option<Box<Expr>>) -> Stmt {
@@ -43,16 +43,15 @@ pub fn assert_false(checker: &mut Checker, stmt: &Stmt, test: &Expr, msg: &Optio
     } = &test.node
     {
         let mut check = Check::new(CheckKind::DoNotAssertFalse, Range::from_located(test));
-        if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
+        if checker.patch() {
             let mut generator = SourceGenerator::new();
             if let Ok(()) = generator.unparse_stmt(&assertion_error(msg)) {
                 if let Ok(content) = generator.generate() {
-                    check.amend(Fix {
+                    check.amend(Fix::replacement(
                         content,
-                        location: stmt.location,
-                        end_location: stmt.end_location,
-                        applied: false,
-                    })
+                        stmt.location,
+                        stmt.end_location.unwrap(),
+                    ));
                 }
             }
         }

src/flake8_bugbear/plugins/assert_raises_exception.rs

@@ -0,0 +1,25 @@
+use rustpython_ast::{ExprKind, Stmt, Withitem};
+
+use crate::ast::helpers::match_name_or_attr;
+use crate::ast::types::Range;
+use crate::check_ast::Checker;
+use crate::checks::{Check, CheckKind};
+
+/// B017
+pub fn assert_raises_exception(checker: &mut Checker, stmt: &Stmt, items: &[Withitem]) {
+    if let Some(item) = items.first() {
+        let item_context = &item.context_expr;
+        if let ExprKind::Call { func, args, .. } = &item_context.node {
+            if match_name_or_attr(func, "assertRaises")
+                && args.len() == 1
+                && match_name_or_attr(args.first().unwrap(), "Exception")
+                && item.optional_vars.is_none()
+            {
+                checker.add_check(Check::new(
+                    CheckKind::NoAssertRaisesException,
+                    Range::from_located(stmt),
+                ));
+            }
+        }
+    }
+}

src/flake8_bugbear/plugins/duplicate_exceptions.rs

@@ -5,9 +5,9 @@ use rustpython_ast::{Excepthandler, ExcepthandlerKind, Expr, ExprContext, ExprKi
 
 use crate::ast::helpers;
 use crate::ast::types::{CheckLocator, Range};
-use crate::autofix::fixer;
+use crate::autofix::Fix;
 use crate::check_ast::Checker;
-use crate::checks::{Check, CheckCode, CheckKind, Fix};
+use crate::checks::{Check, CheckCode, CheckKind};
 use crate::code_gen::SourceGenerator;
 
 fn type_pattern(elts: Vec<&Expr>) -> Expr {
@@ -49,17 +49,16 @@ pub fn duplicate_handler_exceptions(
                 ),
                 checker.locate_check(Range::from_located(expr)),
             );
-            if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
+            if checker.patch() {
                 // TODO(charlie): If we have a single element, remove the tuple.
                 let mut generator = SourceGenerator::new();
                 if let Ok(()) = generator.unparse_expr(&type_pattern(unique_elts), 0) {
                     if let Ok(content) = generator.generate() {
-                        check.amend(Fix {
+                        check.amend(Fix::replacement(
                             content,
-                            location: expr.location,
-                            end_location: expr.end_location,
-                            applied: false,
-                        })
+                            expr.location,
+                            expr.end_location.unwrap(),
+                        ))
                     }
                 }
             }

src/flake8_bugbear/plugins/mod.rs

@@ -0,0 +1,16 @@
+pub use assert_false::assert_false;
+pub use assert_raises_exception::assert_raises_exception;
+pub use duplicate_exceptions::duplicate_exceptions;
+pub use duplicate_exceptions::duplicate_handler_exceptions;
+pub use mutable_argument_default::mutable_argument_default;
+pub use redundant_tuple_in_exception_handler::redundant_tuple_in_exception_handler;
+pub use unary_prefix_increment::unary_prefix_increment;
+pub use unused_loop_control_variable::unused_loop_control_variable;
+
+mod assert_false;
+mod assert_raises_exception;
+mod duplicate_exceptions;
+mod mutable_argument_default;
+mod redundant_tuple_in_exception_handler;
+mod unary_prefix_increment;
+mod unused_loop_control_variable;

src/flake8_bugbear/plugins/mutable_argument_default.rs

@@ -0,0 +1,62 @@
+use rustpython_ast::{Arguments, ExprKind};
+
+use crate::ast::types::{CheckLocator, Range};
+use crate::check_ast::Checker;
+use crate::checks::{Check, CheckKind};
+
+/// B006
+pub fn mutable_argument_default(checker: &mut Checker, arguments: &Arguments) {
+    for expr in arguments
+        .defaults
+        .iter()
+        .chain(arguments.kw_defaults.iter())
+    {
+        match &expr.node {
+            ExprKind::List { .. }
+            | ExprKind::Dict { .. }
+            | ExprKind::Set { .. }
+            | ExprKind::ListComp { .. }
+            | ExprKind::DictComp { .. }
+            | ExprKind::SetComp { .. } => {
+                checker.add_check(Check::new(
+                    CheckKind::MutableArgumentDefault,
+                    checker.locate_check(Range::from_located(expr)),
+                ));
+            }
+            ExprKind::Call { func, .. } => match &func.node {
+                ExprKind::Name { id, .. }
+                    if id == "dict"
+                        || id == "list"
+                        || id == "set"
+                        || id == "Counter"
+                        || id == "OrderedDict"
+                        || id == "defaultdict"
+                        || id == "deque" =>
+                {
+                    checker.add_check(Check::new(
+                        CheckKind::MutableArgumentDefault,
+                        checker.locate_check(Range::from_located(expr)),
+                    ));
+                }
+                ExprKind::Attribute { value, attr, .. }
+                    if (attr == "Counter"
+                        || attr == "OrderedDict"
+                        || attr == "defaultdict"
+                        || attr == "deque") =>
+                {
+                    match &value.node {
+                        ExprKind::Name { id, .. } if id == "collections" => {
+                            checker.add_check(Check::new(
+                                CheckKind::MutableArgumentDefault,
+                                checker.locate_check(Range::from_located(expr)),
+                            ));
+                        }
+                        _ => {}
+                    }
+                }
+                _ => {}
+            },
+            _ => {}
+        }
+    }
+}

src/flake8_bugbear/plugins/redundant_tuple_in_exception_handler.rs

@@ -0,0 +1,22 @@
+use rustpython_ast::{Excepthandler, ExcepthandlerKind, ExprKind};
+
+use crate::ast::types::{CheckLocator, Range};
+use crate::check_ast::Checker;
+use crate::checks::{Check, CheckKind};
+
+/// B013
+pub fn redundant_tuple_in_exception_handler(checker: &mut Checker, handlers: &[Excepthandler]) {
+    for handler in handlers {
+        let ExcepthandlerKind::ExceptHandler { type_, .. } = &handler.node;
+        if let Some(type_) = type_ {
+            if let ExprKind::Tuple { elts, .. } = &type_.node {
+                if elts.len() == 1 {
+                    checker.add_check(Check::new(
+                        CheckKind::RedundantTupleInExceptionHandler(elts[0].to_string()),
+                        checker.locate_check(Range::from_located(type_)),
+                    ));
+                }
+            }
+        }
+    }
+}

src/flake8_bugbear/plugins/unary_prefix_increment.rs

@@ -0,0 +1,19 @@
+use rustpython_ast::{Expr, ExprKind, Unaryop};
+
+use crate::ast::types::Range;
+use crate::check_ast::Checker;
+use crate::checks::{Check, CheckKind};
+
+/// B002
+pub fn unary_prefix_increment(checker: &mut Checker, expr: &Expr, op: &Unaryop, operand: &Expr) {
+    if matches!(op, Unaryop::UAdd) {
+        if let ExprKind::UnaryOp { op, .. } = &operand.node {
+            if matches!(op, Unaryop::UAdd) {
+                checker.add_check(Check::new(
+                    CheckKind::UnaryPrefixIncrement,
+                    Range::from_located(expr),
+                ))
+            }
+        }
+    }
+}

src/flake8_bugbear/plugins/unused_loop_control_variable.rs

@@ -0,0 +1,79 @@
+use std::collections::BTreeMap;
+
+use rustpython_ast::{Expr, ExprKind, Stmt};
+
+use crate::ast::types::Range;
+use crate::ast::visitor;
+use crate::ast::visitor::Visitor;
+use crate::autofix::Fix;
+use crate::check_ast::Checker;
+use crate::checks::{Check, CheckKind};
+
+/// Identify all `ExprKind::Name` nodes in an AST.
+struct NameFinder<'a> {
+    /// A map from identifier to defining expression.
+    names: BTreeMap<&'a str, &'a Expr>,
+}
+
+impl NameFinder<'_> {
+    fn new() -> Self {
+        NameFinder {
+            names: Default::default(),
+        }
+    }
+}
+
+impl<'a, 'b> Visitor<'b> for NameFinder<'a>
+where
+    'b: 'a,
+{
+    fn visit_expr(&mut self, expr: &'a Expr) {
+        if let ExprKind::Name { id, .. } = &expr.node {
+            self.names.insert(id, expr);
+        }
+        visitor::walk_expr(self, expr);
+    }
+}
+
+/// B007
+pub fn unused_loop_control_variable(checker: &mut Checker, target: &Expr, body: &[Stmt]) {
+    let control_names = {
+        let mut finder = NameFinder::new();
+        finder.visit_expr(target);
+        finder.names
+    };
+
+    let used_names = {
+        let mut finder = NameFinder::new();
+        for stmt in body {
+            finder.visit_stmt(stmt);
+        }
+        finder.names
+    };
+
+    for (name, expr) in control_names {
+        // Ignore names that are already underscore-prefixed.
+        if name.starts_with('_') {
+            continue;
+        }
+
+        // Ignore any names that are actually used in the loop body.
+        if used_names.contains_key(name) {
+            continue;
+        }
+
+        let mut check = Check::new(
+            CheckKind::UnusedLoopControlVariable(name.to_string()),
+            Range::from_located(expr),
+        );
+        if checker.patch() {
+            // Prefix the variable name with an underscore.
+            check.amend(Fix::replacement(
+                format!("_{name}"),
+                expr.location,
+                expr.end_location.unwrap(),
+            ))
+        }
+        checker.add_check(check);
+    }
+}

src/flake8_builtins/checks.rs

@@ -0,0 +1,20 @@
+use crate::ast::types::Range;
+use crate::checks::{Check, CheckKind};
+use crate::flake8_builtins::types::ShadowingType;
+use crate::python::builtins::BUILTINS;
+
+/// Check builtin name shadowing.
+pub fn builtin_shadowing(name: &str, location: Range, node_type: ShadowingType) -> Option<Check> {
+    if BUILTINS.contains(&name) {
+        Some(Check::new(
+            match node_type {
+                ShadowingType::Variable => CheckKind::BuiltinVariableShadowing(name.to_string()),
+                ShadowingType::Argument => CheckKind::BuiltinArgumentShadowing(name.to_string()),
+                ShadowingType::Attribute => CheckKind::BuiltinAttributeShadowing(name.to_string()),
+            },
+            location,
+        ))
+    } else {
+        None
+    }
+}

src/flake8_builtins/mod.rs

@@ -0,0 +1,2 @@
+pub mod checks;
+pub mod types;

src/flake8_builtins/types.rs

@@ -0,0 +1,5 @@
+pub enum ShadowingType {
+    Variable,
+    Argument,
+    Attribute,
+}

src/flake8_comprehensions/checks.rs

@@ -0,0 +1,420 @@
+use num_bigint::BigInt;
+use rustpython_ast::{
+    Comprehension, Constant, Expr, ExprKind, Keyword, KeywordData, Located, Unaryop,
+};
+
+use crate::ast::types::Range;
+use crate::checks::{Check, CheckKind};
+
+fn function_name(func: &Expr) -> Option<&str> {
+    if let ExprKind::Name { id, .. } = &func.node {
+        Some(id)
+    } else {
+        None
+    }
+}
+
+fn exactly_one_argument_with_matching_function<'a>(
+    name: &str,
+    func: &Expr,
+    args: &'a [Expr],
+    keywords: &[Keyword],
+) -> Option<&'a ExprKind> {
+    if !keywords.is_empty() {
+        return None;
+    }
+    if args.len() != 1 {
+        return None;
+    }
+    if function_name(func)? != name {
+        return None;
+    }
+    Some(&args[0].node)
+}
+
+fn first_argument_with_matching_function<'a>(
+    name: &str,
+    func: &Expr,
+    args: &'a [Expr],
+) -> Option<&'a ExprKind> {
+    if function_name(func)? != name {
+        return None;
+    }
+    Some(&args.first()?.node)
+}
+
+/// C400 (`list(generator)`)
+pub fn unnecessary_generator_list(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("list", func, args, keywords)?;
+    if let ExprKind::GeneratorExp { .. } = argument {
+        return Some(Check::new(
+            CheckKind::UnnecessaryGeneratorList,
+            Range::from_located(expr),
+        ));
+    }
+    None
+}
+
+/// C401 (`set(generator)`)
+pub fn unnecessary_generator_set(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("set", func, args, keywords)?;
+    if let ExprKind::GeneratorExp { .. } = argument {
+        return Some(Check::new(
+            CheckKind::UnnecessaryGeneratorSet,
+            Range::from_located(expr),
+        ));
+    }
+    None
+}
+
+/// C402 (`dict((x, y) for x, y in iterable)`)
+pub fn unnecessary_generator_dict(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("dict", func, args, keywords)?;
+    if let ExprKind::GeneratorExp { elt, .. } = argument {
+        match &elt.node {
+            ExprKind::Tuple { elts, .. } if elts.len() == 2 => {
+                return Some(Check::new(
+                    CheckKind::UnnecessaryGeneratorDict,
+                    Range::from_located(expr),
+                ));
+            }
+            _ => {}
+        }
+    }
+    None
+}
+
+/// C403 (`set([...])`)
+pub fn unnecessary_list_comprehension_set(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("set", func, args, keywords)?;
+    if let ExprKind::ListComp { .. } = &argument {
+        return Some(Check::new(
+            CheckKind::UnnecessaryListComprehensionSet,
+            Range::from_located(expr),
+        ));
+    }
+    None
+}
+
+/// C404 (`dict([...])`)
+pub fn unnecessary_list_comprehension_dict(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("dict", func, args, keywords)?;
+    if let ExprKind::ListComp { elt, .. } = &argument {
+        match &elt.node {
+            ExprKind::Tuple { elts, .. } if elts.len() == 2 => {
+                return Some(Check::new(
+                    CheckKind::UnnecessaryListComprehensionDict,
+                    Range::from_located(expr),
+                ));
+            }
+            _ => {}
+        }
+    }
+    None
+}
+
+/// C405 (`set([1, 2])`)
+pub fn unnecessary_literal_set(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("set", func, args, keywords)?;
+    let kind = match argument {
+        ExprKind::List { .. } => "list",
+        ExprKind::Tuple { .. } => "tuple",
+        _ => return None,
+    };
+    Some(Check::new(
+        CheckKind::UnnecessaryLiteralSet(kind.to_string()),
+        Range::from_located(expr),
+    ))
+}
+
+/// C406 (`dict([(1, 2)])`)
+pub fn unnecessary_literal_dict(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("dict", func, args, keywords)?;
+    let (kind, elts) = match argument {
+        ExprKind::Tuple { elts, .. } => ("tuple", elts),
+        ExprKind::List { elts, .. } => ("list", elts),
+        _ => return None,
+    };
+
+    if let Some(elt) = elts.first() {
+        // dict((1, 2), ...)) or dict([(1, 2), ...])
+        if !matches!(&elt.node, ExprKind::Tuple { elts, .. } if elts.len() == 2) {
+            return None;
+        }
+    }
+
+    Some(Check::new(
+        CheckKind::UnnecessaryLiteralDict(kind.to_string()),
+        Range::from_located(expr),
+    ))
+}
+
+/// C408
+pub fn unnecessary_collection_call(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Located<KeywordData>],
+) -> Option<Check> {
+    if !args.is_empty() {
+        return None;
+    }
+    let id = function_name(func)?;
+    match id {
+        "dict" if keywords.is_empty() || keywords.iter().all(|kw| kw.node.arg.is_some()) => (),
+        "list" | "tuple" => {
+            // list() or tuple()
+        }
+        _ => return None,
+    };
+    Some(Check::new(
+        CheckKind::UnnecessaryCollectionCall(id.to_string()),
+        Range::from_located(expr),
+    ))
+}
+
+/// C409
+pub fn unnecessary_literal_within_tuple_call(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+) -> Option<Check> {
+    let argument = first_argument_with_matching_function("tuple", func, args)?;
+    let argument_kind = match argument {
+        ExprKind::Tuple { .. } => "tuple",
+        ExprKind::List { .. } => "list",
+        _ => return None,
+    };
+    Some(Check::new(
+        CheckKind::UnnecessaryLiteralWithinTupleCall(argument_kind.to_string()),
+        Range::from_located(expr),
+    ))
+}
+
+/// C410
+pub fn unnecessary_literal_within_list_call(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+) -> Option<Check> {
+    let argument = first_argument_with_matching_function("list", func, args)?;
+    let argument_kind = match argument {
+        ExprKind::Tuple { .. } => "tuple",
+        ExprKind::List { .. } => "list",
+        _ => return None,
+    };
+    Some(Check::new(
+        CheckKind::UnnecessaryLiteralWithinListCall(argument_kind.to_string()),
+        Range::from_located(expr),
+    ))
+}
+
+/// C411
+pub fn unnecessary_list_call(expr: &Expr, func: &Expr, args: &[Expr]) -> Option<Check> {
+    let argument = first_argument_with_matching_function("list", func, args)?;
+    if let ExprKind::ListComp { .. } = argument {
+        return Some(Check::new(
+            CheckKind::UnnecessaryListCall,
+            Range::from_located(expr),
+        ));
+    }
+    None
+}
+
+/// C413
+pub fn unnecessary_call_around_sorted(expr: &Expr, func: &Expr, args: &[Expr]) -> Option<Check> {
+    let outer = function_name(func)?;
+    if !(outer == "list" || outer == "reversed") {
+        return None;
+    }
+    if let ExprKind::Call { func, .. } = &args.first()?.node {
+        if function_name(func)? == "sorted" {
+            return Some(Check::new(
+                CheckKind::UnnecessaryCallAroundSorted(outer.to_string()),
+                Range::from_located(expr),
+            ));
+        }
+    }
+    None
+}
+
+/// C414
+pub fn unnecessary_double_cast_or_process(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+) -> Option<Check> {
+    let outer = function_name(func)?;
+    if !["list", "tuple", "set", "reversed", "sorted"].contains(&outer) {
+        return None;
+    }
+
+    fn new_check(inner: &str, outer: &str, expr: &Expr) -> Check {
+        Check::new(
+            CheckKind::UnnecessaryDoubleCastOrProcess(inner.to_string(), outer.to_string()),
+            Range::from_located(expr),
+        )
+    }
+
+    if let ExprKind::Call { func, .. } = &args.first()?.node {
+        let inner = function_name(func)?;
+        // Ex) set(tuple(...))
+        if (outer == "set" || outer == "sorted")
+            && (inner == "list" || inner == "tuple" || inner == "reversed" || inner == "sorted")
+        {
+            return Some(new_check(inner, outer, expr));
+        }
+
+        // Ex) list(tuple(...))
+        if (outer == "list" || outer == "tuple") && (inner == "list" || inner == "tuple") {
+            return Some(new_check(inner, outer, expr));
+        }
+
+        // Ex) set(set(...))
+        if outer == "set" && inner == "set" {
+            return Some(new_check(inner, outer, expr));
+        }
+    }
+    None
+}
+
+/// C415
+pub fn unnecessary_subscript_reversal(expr: &Expr, func: &Expr, args: &[Expr]) -> Option<Check> {
+    let first_arg = args.first()?;
+    let id = function_name(func)?;
+    if !["set", "sorted", "reversed"].contains(&id) {
+        return None;
+    }
+    if let ExprKind::Subscript { slice, .. } = &first_arg.node {
+        if let ExprKind::Slice { lower, upper, step } = &slice.node {
+            if lower.is_none() && upper.is_none() {
+                if let Some(step) = step {
+                    if let ExprKind::UnaryOp {
+                        op: Unaryop::USub,
+                        operand,
+                    } = &step.node
+                    {
+                        if let ExprKind::Constant {
+                            value: Constant::Int(val),
+                            ..
+                        } = &operand.node
+                        {
+                            if *val == BigInt::from(1) {
+                                return Some(Check::new(
+                                    CheckKind::UnnecessarySubscriptReversal(id.to_string()),
+                                    Range::from_located(expr),
+                                ));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    None
+}
+
+/// C416
+pub fn unnecessary_comprehension(
+    expr: &Expr,
+    elt: &Expr,
+    generators: &[Comprehension],
+) -> Option<Check> {
+    if generators.len() != 1 {
+        return None;
+    }
+    let generator = &generators[0];
+    if !(generator.ifs.is_empty() && generator.is_async == 0) {
+        return None;
+    }
+    let elt_id = function_name(elt)?;
+    let target_id = function_name(&generator.target)?;
+    if elt_id != target_id {
+        return None;
+    }
+    let expr_kind = match &expr.node {
+        ExprKind::ListComp { .. } => "list",
+        ExprKind::SetComp { .. } => "set",
+        _ => return None,
+    };
+    Some(Check::new(
+        CheckKind::UnnecessaryComprehension(expr_kind.to_string()),
+        Range::from_located(expr),
+    ))
+}
+
+/// C417
+pub fn unnecessary_map(expr: &Expr, func: &Expr, args: &[Expr]) -> Option<Check> {
+    fn new_check(kind: &str, expr: &Expr) -> Check {
+        Check::new(
+            CheckKind::UnnecessaryMap(kind.to_string()),
+            Range::from_located(expr),
+        )
+    }
+    let id = function_name(func)?;
+    match id {
+        "map" => {
+            if args.len() == 2 && matches!(&args[0].node, ExprKind::Lambda { .. }) {
+                return Some(new_check("generator", expr));
+            }
+        }
+        "list" | "set" => {
+            if let ExprKind::Call { func, args, .. } = &args.first()?.node {
+                let argument = first_argument_with_matching_function("map", func, args)?;
+                if let ExprKind::Lambda { .. } = argument {
+                    return Some(new_check(id, expr));
+                }
+            }
+        }
+        "dict" => {
+            if args.len() == 1 {
+                if let ExprKind::Call { func, args, .. } = &args[0].node {
+                    let argument = first_argument_with_matching_function("map", func, args)?;
+                    if let ExprKind::Lambda { body, .. } = &argument {
+                        if matches!(&body.node, ExprKind::Tuple { elts, .. } | ExprKind::List { elts, .. } if elts.len() == 2)
+                        {
+                            return Some(new_check(id, expr));
+                        }
+                    }
+                }
+            }
+        }
+        _ => (),
+    }
+    None
+}

src/flake8_comprehensions/mod.rs

@@ -0,0 +1 @@
+pub mod checks;

src/flake8_print/checks.rs

@@ -0,0 +1,36 @@
+use rustpython_ast::{Expr, ExprKind};
+
+use crate::ast::types::Range;
+use crate::checks::{Check, CheckKind};
+
+/// Check whether a function call is a `print` or `pprint` invocation
+pub fn print_call(
+    expr: &Expr,
+    func: &Expr,
+    check_print: bool,
+    check_pprint: bool,
+) -> Option<Check> {
+    if let ExprKind::Name { id, .. } = &func.node {
+        if check_print && id == "print" {
+            return Some(Check::new(CheckKind::PrintFound, Range::from_located(expr)));
+        } else if check_pprint && id == "pprint" {
+            return Some(Check::new(
+                CheckKind::PPrintFound,
+                Range::from_located(expr),
+            ));
+        }
+    }
+
+    if let ExprKind::Attribute { value, attr, .. } = &func.node {
+        if let ExprKind::Name { id, .. } = &value.node {
+            if check_pprint && id == "pprint" && attr == "pprint" {
+                return Some(Check::new(
+                    CheckKind::PPrintFound,
+                    Range::from_located(expr),
+                ));
+            }
+        }
+    }
+
+    None
+}

src/flake8_print/mod.rs

@@ -0,0 +1,2 @@
+mod checks;
+pub mod plugins;

src/flake8_print/plugins/mod.rs

@@ -0,0 +1,3 @@
+pub use print_call::print_call;
+
+mod print_call;

src/flake8_print/plugins/print_call.rs

@@ -1,19 +1,19 @@
 use log::error;
 use rustpython_ast::{Expr, Stmt, StmtKind};
 
-use crate::ast::checkers;
-use crate::autofix::{fixer, fixes};
+use crate::autofix::helpers;
 use crate::check_ast::Checker;
 use crate::checks::CheckCode;
+use crate::flake8_print::checks;
 
 pub fn print_call(checker: &mut Checker, expr: &Expr, func: &Expr) {
-    if let Some(mut check) = checkers::print_call(
+    if let Some(mut check) = checks::print_call(
         expr,
         func,
         checker.settings.enabled.contains(&CheckCode::T201),
         checker.settings.enabled.contains(&CheckCode::T203),
     ) {
-        if matches!(checker.autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
+        if checker.patch() {
             let context = checker.binding_context();
             if matches!(
                 checker.parents[context.defined_by].node,
@@ -25,13 +25,13 @@ pub fn print_call(checker: &mut Checker, expr: &Expr, func: &Expr) {
                     .map(|index| checker.parents[*index])
                     .collect();
 
-                match fixes::remove_stmt(
+                match helpers::remove_stmt(
                     checker.parents[context.defined_by],
                     context.defined_in.map(|index| checker.parents[index]),
                     &deleted,
                 ) {
                     Ok(fix) => {
-                        if fix.content.is_empty() || fix.content == "pass" {
+                        if fix.patch.content.is_empty() || fix.patch.content == "pass" {
                             checker.deletions.insert(context.defined_by);
                         }
                         check.amend(fix)

src/flake8_quotes/checks.rs

@@ -0,0 +1,298 @@
+use rustpython_ast::Location;
+
+use crate::ast::types::Range;
+use crate::checks::{Check, CheckKind};
+use crate::flake8_quotes::settings::{Quote, Settings};
+use crate::source_code_locator::SourceCodeLocator;
+
+fn good_single(quote: &Quote) -> char {
+    match quote {
+        Quote::Single => '\'',
+        Quote::Double => '"',
+    }
+}
+
+fn bad_single(quote: &Quote) -> char {
+    match quote {
+        Quote::Double => '\'',
+        Quote::Single => '"',
+    }
+}
+
+fn good_multiline(quote: &Quote) -> &str {
+    match quote {
+        Quote::Single => "'''",
+        Quote::Double => "\"\"\"",
+    }
+}
+
+fn good_multiline_ending(quote: &Quote) -> &str {
+    match quote {
+        Quote::Single => "'\"\"\"",
+        Quote::Double => "\"'''",
+    }
+}
+
+fn good_docstring(quote: &Quote) -> &str {
+    match quote {
+        Quote::Single => "'''",
+        Quote::Double => "\"\"\"",
+    }
+}
+
+pub fn quotes(
+    locator: &SourceCodeLocator,
+    start: &Location,
+    end: &Location,
+    is_docstring: bool,
+    settings: &Settings,
+) -> Option<Check> {
+    let text = locator.slice_source_code_range(&Range {
+        location: *start,
+        end_location: *end,
+    });
+
+    // Remove any prefixes (e.g., remove `u` from `u"foo"`).
+    let last_quote_char = text.chars().last().unwrap();
+    let first_quote_char = text.find(last_quote_char).unwrap();
+    let prefix = &text[..first_quote_char].to_lowercase();
+    let raw_text = &text[first_quote_char..];
+
+    // Determine if the string is multiline-based.
+    let is_multiline = if raw_text.len() >= 3 {
+        let mut chars = raw_text.chars();
+        let first = chars.next().unwrap();
+        let second = chars.next().unwrap();
+        let third = chars.next().unwrap();
+        first == second && second == third
+    } else {
+        false
+    };
+
+    if is_docstring {
+        if raw_text.contains(good_docstring(&settings.docstring_quotes)) {
+            return None;
+        }
+
+        return Some(Check::new(
+            CheckKind::BadQuotesDocstring(settings.docstring_quotes.clone()),
+            Range {
+                location: *start,
+                end_location: *end,
+            },
+        ));
+    } else if is_multiline {
+        // If our string is or contains a known good string, ignore it.
+        if raw_text.contains(good_multiline(&settings.multiline_quotes)) {
+            return None;
+        }
+
+        // If our string ends with a known good ending, then ignore it.
+        if raw_text.ends_with(good_multiline_ending(&settings.multiline_quotes)) {
+            return None;
+        }
+
+        return Some(Check::new(
+            CheckKind::BadQuotesMultilineString(settings.multiline_quotes.clone()),
+            Range {
+                location: *start,
+                end_location: *end,
+            },
+        ));
+    } else {
+        let string_contents = &raw_text[1..raw_text.len() - 1];
+
+        // If we're using the preferred quotation type, check for escapes.
+        if last_quote_char == good_single(&settings.inline_quotes) {
+            if !settings.avoid_escape || prefix.contains('r') {
+                return None;
+            }
+            if string_contents.contains(good_single(&settings.inline_quotes))
+                && !string_contents.contains(bad_single(&settings.inline_quotes))
+            {
+                return Some(Check::new(
+                    CheckKind::AvoidQuoteEscape,
+                    Range {
+                        location: *start,
+                        end_location: *end,
+                    },
+                ));
+            }
+            return None;
+        }
+
+        // If we're not using the preferred type, only allow use to avoid escapes.
+        if !string_contents.contains(good_single(&settings.inline_quotes)) {
+            return Some(Check::new(
+                CheckKind::BadQuotesInlineString(settings.inline_quotes.clone()),
+                Range {
+                    location: *start,
+                    end_location: *end,
+                },
+            ));
+        }
+    }
+
+    None
+}
+
+#[cfg(test)]
+mod tests {
+    use std::path::Path;
+
+    use anyhow::Result;
+    use rustpython_parser::lexer::LexResult;
+    use test_case::test_case;
+
+    use crate::autofix::fixer;
+    use crate::checks::{Check, CheckCode};
+    use crate::flake8_quotes::settings::Quote;
+    use crate::linter::tokenize;
+    use crate::{flake8_quotes, linter, Settings};
+    use crate::{fs, noqa};
+
+    fn check_path(path: &Path, settings: &Settings, autofix: &fixer::Mode) -> Result<Vec<Check>> {
+        let contents = fs::read_file(path)?;
+        let tokens: Vec<LexResult> = tokenize(&contents);
+        let noqa_line_for = noqa::extract_noqa_line_for(&tokens);
+        linter::check_path(path, &contents, tokens, &noqa_line_for, settings, autofix)
+    }
+
+    #[test_case(Path::new("doubles.py"))]
+    #[test_case(Path::new("doubles_escaped.py"))]
+    #[test_case(Path::new("doubles_multiline_string.py"))]
+    #[test_case(Path::new("doubles_noqa.py"))]
+    #[test_case(Path::new("doubles_wrapped.py"))]
+    fn doubles(path: &Path) -> Result<()> {
+        let snapshot = format!("doubles_{}", path.to_string_lossy());
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/flake8_quotes")
+                .join(path)
+                .as_path(),
+            &Settings {
+                flake8_quotes: flake8_quotes::settings::Settings {
+                    inline_quotes: Quote::Single,
+                    multiline_quotes: Quote::Single,
+                    docstring_quotes: Quote::Single,
+                    avoid_escape: true,
+                },
+                ..Settings::for_rules(vec![
+                    CheckCode::Q000,
+                    CheckCode::Q001,
+                    CheckCode::Q002,
+                    CheckCode::Q003,
+                ])
+            },
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(snapshot, checks);
+        Ok(())
+    }
+
+    #[test_case(Path::new("singles.py"))]
+    #[test_case(Path::new("singles_escaped.py"))]
+    #[test_case(Path::new("singles_multiline_string.py"))]
+    #[test_case(Path::new("singles_noqa.py"))]
+    #[test_case(Path::new("singles_wrapped.py"))]
+    fn singles(path: &Path) -> Result<()> {
+        let snapshot = format!("singles_{}", path.to_string_lossy());
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/flake8_quotes")
+                .join(path)
+                .as_path(),
+            &Settings {
+                flake8_quotes: flake8_quotes::settings::Settings {
+                    inline_quotes: Quote::Double,
+                    multiline_quotes: Quote::Double,
+                    docstring_quotes: Quote::Double,
+                    avoid_escape: true,
+                },
+                ..Settings::for_rules(vec![
+                    CheckCode::Q000,
+                    CheckCode::Q001,
+                    CheckCode::Q002,
+                    CheckCode::Q003,
+                ])
+            },
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(snapshot, checks);
+        Ok(())
+    }
+
+    #[test_case(Path::new("docstring_doubles.py"))]
+    #[test_case(Path::new("docstring_doubles_module_multiline.py"))]
+    #[test_case(Path::new("docstring_doubles_module_singleline.py"))]
+    #[test_case(Path::new("docstring_doubles_class.py"))]
+    #[test_case(Path::new("docstring_doubles_function.py"))]
+    #[test_case(Path::new("docstring_singles.py"))]
+    #[test_case(Path::new("docstring_singles_module_multiline.py"))]
+    #[test_case(Path::new("docstring_singles_module_singleline.py"))]
+    #[test_case(Path::new("docstring_singles_class.py"))]
+    #[test_case(Path::new("docstring_singles_function.py"))]
+    fn double_docstring(path: &Path) -> Result<()> {
+        let snapshot = format!("double_docstring_{}", path.to_string_lossy());
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/flake8_quotes")
+                .join(path)
+                .as_path(),
+            &Settings {
+                flake8_quotes: flake8_quotes::settings::Settings {
+                    inline_quotes: Quote::Single,
+                    multiline_quotes: Quote::Single,
+                    docstring_quotes: Quote::Double,
+                    avoid_escape: true,
+                },
+                ..Settings::for_rules(vec![
+                    CheckCode::Q000,
+                    CheckCode::Q001,
+                    CheckCode::Q002,
+                    CheckCode::Q003,
+                ])
+            },
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(snapshot, checks);
+        Ok(())
+    }
+
+    #[test_case(Path::new("docstring_doubles.py"))]
+    #[test_case(Path::new("docstring_doubles_module_multiline.py"))]
+    #[test_case(Path::new("docstring_doubles_module_singleline.py"))]
+    #[test_case(Path::new("docstring_doubles_class.py"))]
+    #[test_case(Path::new("docstring_doubles_function.py"))]
+    #[test_case(Path::new("docstring_singles.py"))]
+    #[test_case(Path::new("docstring_singles_module_multiline.py"))]
+    #[test_case(Path::new("docstring_singles_module_singleline.py"))]
+    #[test_case(Path::new("docstring_singles_class.py"))]
+    #[test_case(Path::new("docstring_singles_function.py"))]
+    fn single_docstring(path: &Path) -> Result<()> {
+        let snapshot = format!("single_docstring_{}", path.to_string_lossy());
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/flake8_quotes")
+                .join(path)
+                .as_path(),
+            &Settings {
+                flake8_quotes: flake8_quotes::settings::Settings {
+                    inline_quotes: Quote::Single,
+                    multiline_quotes: Quote::Double,
+                    docstring_quotes: Quote::Single,
+                    avoid_escape: true,
+                },
+                ..Settings::for_rules(vec![
+                    CheckCode::Q000,
+                    CheckCode::Q001,
+                    CheckCode::Q002,
+                    CheckCode::Q003,
+                ])
+            },
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(snapshot, checks);
+        Ok(())
+    }
+}

src/flake8_quotes/docstring_detection.rs

@@ -0,0 +1,118 @@
+//! Extract docstrings via tokenization.
+//!
+//! See: https://github.com/zheller/flake8-quotes/blob/ef0d9a90249a080e460b70ab62bf4b65e5aa5816/flake8_quotes/docstring_detection.py#L29
+//!
+//! TODO(charlie): Consolidate with the existing AST-based docstring extraction.
+
+use rustpython_parser::lexer::Tok;
+
+#[derive(Debug)]
+enum State {
+    // Start of the module: first string gets marked as a docstring.
+    ExpectModuleDocstring,
+    // After seeing a class definition, we're waiting for the block colon (and do bracket counting).
+    ExpectClassColon,
+    // After seeing the block colon in a class definition, we expect a docstring.
+    ExpectClassDocstring,
+    // Same as ExpectClassColon, but for function definitions.
+    ExpectFunctionColon,
+    // Same as ExpectClassDocstring, but for function definitions.
+    ExpectFunctionDocstring,
+    // Skip tokens until we observe a `class` or `def`.
+    Other,
+}
+
+pub struct StateMachine {
+    state: State,
+    bracket_count: usize,
+}
+
+impl StateMachine {
+    pub fn new() -> Self {
+        Self {
+            state: State::ExpectModuleDocstring,
+            bracket_count: 0,
+        }
+    }
+
+    pub fn consume(&mut self, tok: &Tok) -> bool {
+        if matches!(tok, Tok::Newline | Tok::Indent | Tok::Dedent) {
+            return false;
+        }
+
+        if matches!(tok, Tok::String { .. }) {
+            return if matches!(
+                self.state,
+                State::ExpectModuleDocstring
+                    | State::ExpectClassDocstring
+                    | State::ExpectFunctionDocstring
+            ) {
+                self.state = State::Other;
+                true
+            } else {
+                false
+            };
+        }
+
+        if matches!(tok, Tok::Class) {
+            self.state = State::ExpectClassColon;
+            self.bracket_count = 0;
+            return false;
+        }
+
+        if matches!(tok, Tok::Def) {
+            self.state = State::ExpectFunctionColon;
+            self.bracket_count = 0;
+            return false;
+        }
+
+        if matches!(tok, Tok::Colon) {
+            if self.bracket_count == 0 {
+                if matches!(self.state, State::ExpectClassColon) {
+                    self.state = State::ExpectClassDocstring;
+                } else if matches!(self.state, State::ExpectFunctionColon) {
+                    self.state = State::ExpectFunctionDocstring;
+                }
+            }
+            return false;
+        }
+
+        if matches!(tok, Tok::Lpar | Tok::Lbrace | Tok::Lsqb) {
+            self.bracket_count += 1;
+            if matches!(
+                self.state,
+                State::ExpectModuleDocstring
+                    | State::ExpectClassDocstring
+                    | State::ExpectFunctionDocstring
+            ) {
+                self.state = State::Other;
+            }
+            return false;
+        }
+
+        if matches!(tok, Tok::Rpar | Tok::Rbrace | Tok::Rsqb) {
+            self.bracket_count -= 1;
+            if matches!(
+                self.state,
+                State::ExpectModuleDocstring
+                    | State::ExpectClassDocstring
+                    | State::ExpectFunctionDocstring
+            ) {
+                self.state = State::Other;
+            }
+            return false;
+        }
+
+        if matches!(
+            self.state,
+            State::ExpectModuleDocstring
+                | State::ExpectClassDocstring
+                | State::ExpectFunctionDocstring
+        ) {
+            self.state = State::Other;
+            return false;
+        }
+
+        false
+    }
+}

src/flake8_quotes/mod.rs

@@ -0,0 +1,3 @@
+pub mod checks;
+pub mod docstring_detection;
+pub mod settings;

src/flake8_quotes/settings.rs

@@ -0,0 +1,49 @@
+//! Settings for the `flake-quotes` plugin.
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize)]
+#[serde(deny_unknown_fields, rename_all = "kebab-case")]
+pub enum Quote {
+    Single,
+    Double,
+}
+
+#[derive(Debug, PartialEq, Eq, Deserialize)]
+#[serde(deny_unknown_fields, rename_all = "kebab-case")]
+pub struct Options {
+    pub inline_quotes: Option<Quote>,
+    pub multiline_quotes: Option<Quote>,
+    pub docstring_quotes: Option<Quote>,
+    pub avoid_escape: Option<bool>,
+}
+
+#[derive(Debug)]
+pub struct Settings {
+    pub inline_quotes: Quote,
+    pub multiline_quotes: Quote,
+    pub docstring_quotes: Quote,
+    pub avoid_escape: bool,
+}
+
+impl Settings {
+    pub fn from_options(options: Options) -> Self {
+        Self {
+            inline_quotes: options.inline_quotes.unwrap_or(Quote::Single),
+            multiline_quotes: options.multiline_quotes.unwrap_or(Quote::Double),
+            docstring_quotes: options.docstring_quotes.unwrap_or(Quote::Double),
+            avoid_escape: options.avoid_escape.unwrap_or(true),
+        }
+    }
+}
+
+impl Default for Settings {
+    fn default() -> Self {
+        Self {
+            inline_quotes: Quote::Single,
+            multiline_quotes: Quote::Double,
+            docstring_quotes: Quote::Double,
+            avoid_escape: true,
+        }
+    }
+}

src/flake8_quotes/snapshots/ruff__flake8_quotes__checks__tests__double_docstring_docstring_doubles.py.snap

@@ -0,0 +1,50 @@
+---
+source: src/flake8_quotes/checks.rs
+expression: checks
+---
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 5
+    column: 0
+  end_location:
+    row: 7
+    column: 3
+  fix: ~
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 16
+    column: 4
+  end_location:
+    row: 18
+    column: 7
+  fix: ~
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 21
+    column: 20
+  end_location:
+    row: 22
+    column: 37
+  fix: ~
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 30
+    column: 8
+  end_location:
+    row: 32
+    column: 11
+  fix: ~
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 35
+    column: 12
+  end_location:
+    row: 37
+    column: 15
+  fix: ~
+

src/flake8_quotes/snapshots/ruff__flake8_quotes__checks__tests__double_docstring_docstring_doubles_class.py.snap

@@ -0,0 +1,23 @@
+---
+source: src/flake8_quotes/checks.rs
+expression: checks
+---
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 3
+    column: 4
+  end_location:
+    row: 3
+    column: 27
+  fix: ~
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 5
+    column: 22
+  end_location:
+    row: 5
+    column: 43
+  fix: ~
+

src/flake8_quotes/snapshots/ruff__flake8_quotes__checks__tests__double_docstring_docstring_doubles_function.py.snap

@@ -0,0 +1,50 @@
+---
+source: src/flake8_quotes/checks.rs
+expression: checks
+---
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 3
+    column: 4
+  end_location:
+    row: 3
+    column: 26
+  fix: ~
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 11
+    column: 4
+  end_location:
+    row: 11
+    column: 26
+  fix: ~
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 15
+    column: 38
+  end_location:
+    row: 17
+    column: 3
+  fix: ~
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 17
+    column: 4
+  end_location:
+    row: 17
+    column: 19
+  fix: ~
+- kind:
+    BadQuotesMultilineString: single
+  location:
+    row: 21
+    column: 4
+  end_location:
+    row: 21
+    column: 27
+  fix: ~
+