Move pyupgrade violations to rule modules (#2490)

src/registry.rs

@@ -224,38 +224,38 @@ ruff_macros::define_rule_mapping!(
     SIM300 => violations::YodaConditions,
     SIM401 => violations::DictGetWithDefault,
     // pyupgrade
-    UP001 => violations::UselessMetaclassType,
-    UP003 => violations::TypeOfPrimitive,
-    UP004 => violations::UselessObjectInheritance,
-    UP005 => violations::DeprecatedUnittestAlias,
-    UP006 => violations::UsePEP585Annotation,
-    UP007 => violations::UsePEP604Annotation,
-    UP008 => violations::SuperCallWithParameters,
-    UP009 => violations::PEP3120UnnecessaryCodingComment,
-    UP010 => violations::UnnecessaryFutureImport,
-    UP011 => violations::LRUCacheWithoutParameters,
-    UP012 => violations::UnnecessaryEncodeUTF8,
-    UP013 => violations::ConvertTypedDictFunctionalToClass,
-    UP014 => violations::ConvertNamedTupleFunctionalToClass,
-    UP015 => violations::RedundantOpenModes,
-    UP017 => violations::DatetimeTimezoneUTC,
-    UP018 => violations::NativeLiterals,
-    UP019 => violations::TypingTextStrAlias,
-    UP020 => violations::OpenAlias,
-    UP021 => violations::ReplaceUniversalNewlines,
-    UP022 => violations::ReplaceStdoutStderr,
-    UP023 => violations::RewriteCElementTree,
-    UP024 => violations::OSErrorAlias,
-    UP025 => violations::RewriteUnicodeLiteral,
-    UP026 => violations::RewriteMockImport,
-    UP027 => violations::RewriteListComprehension,
-    UP028 => violations::RewriteYieldFrom,
-    UP029 => violations::UnnecessaryBuiltinImport,
-    UP030 => violations::FormatLiterals,
-    UP031 => violations::PrintfStringFormatting,
-    UP032 => violations::FString,
-    UP033 => violations::FunctoolsCache,
-    UP034 => violations::ExtraneousParentheses,
+    UP001 => rules::pyupgrade::rules::UselessMetaclassType,
+    UP003 => rules::pyupgrade::rules::TypeOfPrimitive,
+    UP004 => rules::pyupgrade::rules::UselessObjectInheritance,
+    UP005 => rules::pyupgrade::rules::DeprecatedUnittestAlias,
+    UP006 => rules::pyupgrade::rules::UsePEP585Annotation,
+    UP007 => rules::pyupgrade::rules::UsePEP604Annotation,
+    UP008 => rules::pyupgrade::rules::SuperCallWithParameters,
+    UP009 => rules::pyupgrade::rules::PEP3120UnnecessaryCodingComment,
+    UP010 => rules::pyupgrade::rules::UnnecessaryFutureImport,
+    UP011 => rules::pyupgrade::rules::LRUCacheWithoutParameters,
+    UP012 => rules::pyupgrade::rules::UnnecessaryEncodeUTF8,
+    UP013 => rules::pyupgrade::rules::ConvertTypedDictFunctionalToClass,
+    UP014 => rules::pyupgrade::rules::ConvertNamedTupleFunctionalToClass,
+    UP015 => rules::pyupgrade::rules::RedundantOpenModes,
+    UP017 => rules::pyupgrade::rules::DatetimeTimezoneUTC,
+    UP018 => rules::pyupgrade::rules::NativeLiterals,
+    UP019 => rules::pyupgrade::rules::TypingTextStrAlias,
+    UP020 => rules::pyupgrade::rules::OpenAlias,
+    UP021 => rules::pyupgrade::rules::ReplaceUniversalNewlines,
+    UP022 => rules::pyupgrade::rules::ReplaceStdoutStderr,
+    UP023 => rules::pyupgrade::rules::RewriteCElementTree,
+    UP024 => rules::pyupgrade::rules::OSErrorAlias,
+    UP025 => rules::pyupgrade::rules::RewriteUnicodeLiteral,
+    UP026 => rules::pyupgrade::rules::RewriteMockImport,
+    UP027 => rules::pyupgrade::rules::RewriteListComprehension,
+    UP028 => rules::pyupgrade::rules::RewriteYieldFrom,
+    UP029 => rules::pyupgrade::rules::UnnecessaryBuiltinImport,
+    UP030 => rules::pyupgrade::rules::FormatLiterals,
+    UP031 => rules::pyupgrade::rules::PrintfStringFormatting,
+    UP032 => rules::pyupgrade::rules::FString,
+    UP033 => rules::pyupgrade::rules::FunctoolsCache,
+    UP034 => rules::pyupgrade::rules::ExtraneousParentheses,
     UP035 => rules::pyupgrade::rules::ImportReplacements,
     UP036 => rules::pyupgrade::rules::OutdatedVersionBlock,
     // pydocstyle

src/rules/pyupgrade/rules/convert_named_tuple_functional_to_class.rs

@@ -1,5 +1,8 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
 use anyhow::{bail, Result};
 use log::debug;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Constant, Expr, ExprContext, ExprKind, Keyword, Stmt, StmtKind};
 
 use crate::ast::helpers::{create_expr, create_stmt, unparse_stmt};
@@ -10,7 +13,24 @@ use crate::python::identifiers::is_identifier;
 use crate::python::keyword::KWLIST;
 use crate::registry::Diagnostic;
 use crate::source_code::Stylist;
-use crate::violations;
+
+define_violation!(
+    pub struct ConvertNamedTupleFunctionalToClass {
+        pub name: String,
+    }
+);
+impl AlwaysAutofixableViolation for ConvertNamedTupleFunctionalToClass {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let ConvertNamedTupleFunctionalToClass { name } = self;
+        format!("Convert `{name}` from `NamedTuple` functional to class syntax")
+    }
+
+    fn autofix_title(&self) -> String {
+        let ConvertNamedTupleFunctionalToClass { name } = self;
+        format!("Convert `{name}` to class syntax")
+    }
+}
 
 /// Return the typename, args, keywords, and base class.
 fn match_named_tuple_assign<'a>(
@@ -154,7 +174,7 @@ pub fn convert_named_tuple_functional_to_class(
         return;
     };
     let mut diagnostic = Diagnostic::new(
-        violations::ConvertNamedTupleFunctionalToClass {
+        ConvertNamedTupleFunctionalToClass {
             name: typename.to_string(),
         },
         Range::from_located(stmt),

src/rules/pyupgrade/rules/convert_typed_dict_functional_to_class.rs

@@ -1,5 +1,8 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
 use anyhow::{bail, Result};
 use log::debug;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Constant, Expr, ExprContext, ExprKind, Keyword, Stmt, StmtKind};
 
 use crate::ast::helpers::{create_expr, create_stmt, unparse_stmt};
@@ -10,7 +13,24 @@ use crate::python::identifiers::is_identifier;
 use crate::python::keyword::KWLIST;
 use crate::registry::Diagnostic;
 use crate::source_code::Stylist;
-use crate::violations;
+
+define_violation!(
+    pub struct ConvertTypedDictFunctionalToClass {
+        pub name: String,
+    }
+);
+impl AlwaysAutofixableViolation for ConvertTypedDictFunctionalToClass {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let ConvertTypedDictFunctionalToClass { name } = self;
+        format!("Convert `{name}` from `TypedDict` functional to class syntax")
+    }
+
+    fn autofix_title(&self) -> String {
+        let ConvertTypedDictFunctionalToClass { name } = self;
+        format!("Convert `{name}` to class syntax")
+    }
+}
 
 /// Return the class name, arguments, keywords and base class for a `TypedDict`
 /// assignment.
@@ -201,7 +221,7 @@ pub fn convert_typed_dict_functional_to_class(
     };
 
     let mut diagnostic = Diagnostic::new(
-        violations::ConvertTypedDictFunctionalToClass {
+        ConvertTypedDictFunctionalToClass {
             name: class_name.to_string(),
         },
         Range::from_located(stmt),

src/rules/pyupgrade/rules/datetime_utc_alias.rs

@@ -1,3 +1,6 @@
+use crate::violation::{Availability, Violation};
+use crate::{define_violation, AutofixKind};
+use ruff_macros::derive_message_formats;
 use rustpython_ast::Expr;
 
 use crate::ast::helpers::collect_call_path;
@@ -5,7 +8,28 @@ use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct DatetimeTimezoneUTC {
+        pub straight_import: bool,
+    }
+);
+impl Violation for DatetimeTimezoneUTC {
+    const AUTOFIX: Option<AutofixKind> = Some(AutofixKind::new(Availability::Always));
+
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Use `datetime.UTC` alias")
+    }
+
+    fn autofix_title_formatter(&self) -> Option<fn(&Self) -> String> {
+        if self.straight_import {
+            Some(|_| "Convert to `datetime.UTC` alias".to_string())
+        } else {
+            None
+        }
+    }
+}
 
 /// UP017
 pub fn datetime_utc_alias(checker: &mut Checker, expr: &Expr) {
@@ -14,7 +38,7 @@ pub fn datetime_utc_alias(checker: &mut Checker, expr: &Expr) {
     }) {
         let straight_import = collect_call_path(expr).as_slice() == ["datetime", "timezone", "utc"];
         let mut diagnostic = Diagnostic::new(
-            violations::DatetimeTimezoneUTC { straight_import },
+            DatetimeTimezoneUTC { straight_import },
             Range::from_located(expr),
         );
         if checker.patch(diagnostic.kind.rule()) {

src/rules/pyupgrade/rules/deprecated_unittest_alias.rs

@@ -1,4 +1,7 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
 use once_cell::sync::Lazy;
+use ruff_macros::derive_message_formats;
 use rustc_hash::FxHashMap;
 use rustpython_ast::{Expr, ExprKind};
 
@@ -6,7 +9,25 @@ use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct DeprecatedUnittestAlias {
+        pub alias: String,
+        pub target: String,
+    }
+);
+impl AlwaysAutofixableViolation for DeprecatedUnittestAlias {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let DeprecatedUnittestAlias { alias, target } = self;
+        format!("`{alias}` is deprecated, use `{target}`")
+    }
+
+    fn autofix_title(&self) -> String {
+        let DeprecatedUnittestAlias { alias, target } = self;
+        format!("Replace `{target}` with `{alias}`")
+    }
+}
 
 static DEPRECATED_ALIASES: Lazy<FxHashMap<&'static str, &'static str>> = Lazy::new(|| {
     FxHashMap::from_iter([
@@ -43,7 +64,7 @@ pub fn deprecated_unittest_alias(checker: &mut Checker, expr: &Expr) {
         return;
     }
     let mut diagnostic = Diagnostic::new(
-        violations::DeprecatedUnittestAlias {
+        DeprecatedUnittestAlias {
             alias: attr.to_string(),
             target: target.to_string(),
         },

src/rules/pyupgrade/rules/extraneous_parentheses.rs

@@ -1,3 +1,6 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_parser::lexer::{LexResult, Tok};
 
 use crate::ast::types::Range;
@@ -5,7 +8,20 @@ use crate::fix::Fix;
 use crate::registry::{Diagnostic, Rule};
 use crate::settings::{flags, Settings};
 use crate::source_code::Locator;
-use crate::violations;
+
+define_violation!(
+    pub struct ExtraneousParentheses;
+);
+impl AlwaysAutofixableViolation for ExtraneousParentheses {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Avoid extraneous parentheses")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Remove extraneous parentheses".to_string()
+    }
+}
 
 // See: https://github.com/asottile/pyupgrade/blob/97ed6fb3cf2e650d4f762ba231c3f04c41797710/pyupgrade/_main.py#L148
 fn match_extraneous_parentheses(tokens: &[LexResult], mut i: usize) -> Option<(usize, usize)> {
@@ -120,7 +136,7 @@ pub fn extraneous_parentheses(
                     return diagnostics;
                 };
                 let mut diagnostic =
-                    Diagnostic::new(violations::ExtraneousParentheses, Range::new(*start, *end));
+                    Diagnostic::new(ExtraneousParentheses, Range::new(*start, *end));
                 if matches!(autofix, flags::Autofix::Enabled)
                     && settings.rules.should_fix(&Rule::ExtraneousParentheses)
                 {

src/rules/pyupgrade/rules/f_strings.rs

@@ -1,3 +1,6 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustc_hash::FxHashMap;
 use rustpython_ast::{Constant, Expr, ExprKind, KeywordData};
 use rustpython_common::format::{
@@ -13,7 +16,20 @@ use crate::registry::Diagnostic;
 use crate::rules::pydocstyle::helpers::{leading_quote, trailing_quote};
 use crate::rules::pyflakes::format::FormatSummary;
 use crate::rules::pyupgrade::helpers::curly_escape;
-use crate::violations;
+
+define_violation!(
+    pub struct FString;
+);
+impl AlwaysAutofixableViolation for FString {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Use f-string instead of `format` call")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Convert to f-string".to_string()
+    }
+}
 
 /// Like [`FormatSummary`], but maps positional and keyword arguments to their
 /// values. For example, given `{a} {b}".format(a=1, b=2)`, `FormatFunction`
@@ -257,7 +273,7 @@ pub(crate) fn f_strings(checker: &mut Checker, summary: &FormatSummary, expr: &E
         return;
     }
 
-    let mut diagnostic = Diagnostic::new(violations::FString, Range::from_located(expr));
+    let mut diagnostic = Diagnostic::new(FString, Range::from_located(expr));
     if checker.patch(diagnostic.kind.rule()) {
         diagnostic.amend(Fix::replacement(
             contents,

src/rules/pyupgrade/rules/format_literals.rs

@@ -1,7 +1,10 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
 use anyhow::{anyhow, bail, Result};
 use libcst_native::{Arg, Codegen, CodegenState, Expression};
 use once_cell::sync::Lazy;
 use regex::Regex;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::Expr;
 
 use crate::ast::types::Range;
@@ -11,7 +14,20 @@ use crate::fix::Fix;
 use crate::registry::Diagnostic;
 use crate::rules::pyflakes::format::FormatSummary;
 use crate::source_code::{Locator, Stylist};
-use crate::violations;
+
+define_violation!(
+    pub struct FormatLiterals;
+);
+impl AlwaysAutofixableViolation for FormatLiterals {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Use implicit references for positional format fields")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Remove explicit positional indexes".to_string()
+    }
+}
 
 // An opening curly brace, followed by any integer, followed by any text,
 // followed by a closing brace.
@@ -112,7 +128,7 @@ pub(crate) fn format_literals(checker: &mut Checker, summary: &FormatSummary, ex
         return;
     }
 
-    let mut diagnostic = Diagnostic::new(violations::FormatLiterals, Range::from_located(expr));
+    let mut diagnostic = Diagnostic::new(FormatLiterals, Range::from_located(expr));
     if checker.patch(diagnostic.kind.rule()) {
         // Currently, the only issue we know of is in LibCST:
         // https://github.com/Instagram/LibCST/issues/846

src/rules/pyupgrade/rules/functools_cache.rs

@@ -1,3 +1,6 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Constant, ExprKind, KeywordData};
 use rustpython_parser::ast::Expr;
 
@@ -6,7 +9,20 @@ use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct FunctoolsCache;
+);
+impl AlwaysAutofixableViolation for FunctoolsCache {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Use `@functools.cache` instead of `@functools.lru_cache(maxsize=None)`")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Rewrite with `@functools.cache".to_string()
+    }
+}
 
 /// UP033
 pub fn functools_cache(checker: &mut Checker, decorator_list: &[Expr]) {
@@ -37,7 +53,7 @@ pub fn functools_cache(checker: &mut Checker, decorator_list: &[Expr]) {
                 )
             {
                 let mut diagnostic = Diagnostic::new(
-                    violations::FunctoolsCache,
+                    FunctoolsCache,
                     Range::new(func.end_location.unwrap(), expr.end_location.unwrap()),
                 );
                 if checker.patch(diagnostic.kind.rule()) {

src/rules/pyupgrade/rules/import_replacements.rs

@@ -1,7 +1,6 @@
 use itertools::Itertools;
-use rustpython_ast::{Alias, AliasData, Stmt};
-
 use ruff_macros::derive_message_formats;
+use rustpython_ast::{Alias, AliasData, Stmt};
 
 use crate::ast::types::Range;
 use crate::ast::whitespace::indentation;

src/rules/pyupgrade/rules/lru_cache_without_parameters.rs

@@ -1,3 +1,6 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::ExprKind;
 use rustpython_parser::ast::Expr;
 
@@ -6,7 +9,20 @@ use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct LRUCacheWithoutParameters;
+);
+impl AlwaysAutofixableViolation for LRUCacheWithoutParameters {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Unnecessary parameters to `functools.lru_cache`")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Remove unnecessary parameters".to_string()
+    }
+}
 
 /// UP011
 pub fn lru_cache_without_parameters(checker: &mut Checker, decorator_list: &[Expr]) {
@@ -27,7 +43,7 @@ pub fn lru_cache_without_parameters(checker: &mut Checker, decorator_list: &[Exp
             })
         {
             let mut diagnostic = Diagnostic::new(
-                violations::LRUCacheWithoutParameters,
+                LRUCacheWithoutParameters,
                 Range::new(func.end_location.unwrap(), expr.end_location.unwrap()),
             );
             if checker.patch(diagnostic.kind.rule()) {

src/rules/pyupgrade/rules/mod.rs

@@ -1,38 +1,48 @@
-pub(crate) use convert_named_tuple_functional_to_class::convert_named_tuple_functional_to_class;
-pub(crate) use convert_typed_dict_functional_to_class::convert_typed_dict_functional_to_class;
-pub(crate) use datetime_utc_alias::datetime_utc_alias;
-pub(crate) use deprecated_unittest_alias::deprecated_unittest_alias;
-pub(crate) use extraneous_parentheses::extraneous_parentheses;
-pub(crate) use f_strings::f_strings;
-pub(crate) use format_literals::format_literals;
-pub(crate) use functools_cache::functools_cache;
+pub(crate) use convert_named_tuple_functional_to_class::{
+    convert_named_tuple_functional_to_class, ConvertNamedTupleFunctionalToClass,
+};
+pub(crate) use convert_typed_dict_functional_to_class::{
+    convert_typed_dict_functional_to_class, ConvertTypedDictFunctionalToClass,
+};
+pub(crate) use datetime_utc_alias::{datetime_utc_alias, DatetimeTimezoneUTC};
+pub(crate) use deprecated_unittest_alias::{deprecated_unittest_alias, DeprecatedUnittestAlias};
+pub(crate) use extraneous_parentheses::{extraneous_parentheses, ExtraneousParentheses};
+pub(crate) use f_strings::{f_strings, FString};
+pub(crate) use format_literals::{format_literals, FormatLiterals};
+pub(crate) use functools_cache::{functools_cache, FunctoolsCache};
 pub(crate) use import_replacements::{import_replacements, ImportReplacements};
-pub(crate) use lru_cache_without_parameters::lru_cache_without_parameters;
-pub(crate) use native_literals::native_literals;
-pub(crate) use open_alias::open_alias;
-pub(crate) use os_error_alias::os_error_alias;
+pub(crate) use lru_cache_without_parameters::{
+    lru_cache_without_parameters, LRUCacheWithoutParameters,
+};
+pub(crate) use native_literals::{native_literals, NativeLiterals};
+pub(crate) use open_alias::{open_alias, OpenAlias};
+pub(crate) use os_error_alias::{os_error_alias, OSErrorAlias};
 pub(crate) use outdated_version_block::{outdated_version_block, OutdatedVersionBlock};
-pub(crate) use printf_string_formatting::printf_string_formatting;
-pub(crate) use redundant_open_modes::redundant_open_modes;
-pub(crate) use replace_stdout_stderr::replace_stdout_stderr;
-pub(crate) use replace_universal_newlines::replace_universal_newlines;
-pub(crate) use rewrite_c_element_tree::replace_c_element_tree;
-pub(crate) use rewrite_mock_import::{rewrite_mock_attribute, rewrite_mock_import};
-pub(crate) use rewrite_unicode_literal::rewrite_unicode_literal;
-pub(crate) use rewrite_yield_from::rewrite_yield_from;
+pub(crate) use printf_string_formatting::{printf_string_formatting, PrintfStringFormatting};
+pub(crate) use redundant_open_modes::{redundant_open_modes, RedundantOpenModes};
+pub(crate) use replace_stdout_stderr::{replace_stdout_stderr, ReplaceStdoutStderr};
+pub(crate) use replace_universal_newlines::{replace_universal_newlines, ReplaceUniversalNewlines};
+pub(crate) use rewrite_c_element_tree::{replace_c_element_tree, RewriteCElementTree};
+pub(crate) use rewrite_mock_import::{
+    rewrite_mock_attribute, rewrite_mock_import, RewriteMockImport,
+};
+pub(crate) use rewrite_unicode_literal::{rewrite_unicode_literal, RewriteUnicodeLiteral};
+pub(crate) use rewrite_yield_from::{rewrite_yield_from, RewriteYieldFrom};
 pub(crate) use super_args::super_args;
-pub(crate) use super_call_with_parameters::super_call_with_parameters;
-pub(crate) use type_of_primitive::type_of_primitive;
-pub(crate) use typing_text_str_alias::typing_text_str_alias;
-pub(crate) use unnecessary_builtin_import::unnecessary_builtin_import;
-pub(crate) use unnecessary_coding_comment::unnecessary_coding_comment;
-pub(crate) use unnecessary_encode_utf8::unnecessary_encode_utf8;
-pub(crate) use unnecessary_future_import::unnecessary_future_import;
-pub(crate) use unpack_list_comprehension::unpack_list_comprehension;
-pub(crate) use use_pep585_annotation::use_pep585_annotation;
-pub(crate) use use_pep604_annotation::use_pep604_annotation;
-pub(crate) use useless_metaclass_type::useless_metaclass_type;
-pub(crate) use useless_object_inheritance::useless_object_inheritance;
+pub(crate) use super_call_with_parameters::{super_call_with_parameters, SuperCallWithParameters};
+pub(crate) use type_of_primitive::{type_of_primitive, TypeOfPrimitive};
+pub(crate) use typing_text_str_alias::{typing_text_str_alias, TypingTextStrAlias};
+pub(crate) use unnecessary_builtin_import::{unnecessary_builtin_import, UnnecessaryBuiltinImport};
+pub(crate) use unnecessary_coding_comment::{
+    unnecessary_coding_comment, PEP3120UnnecessaryCodingComment,
+};
+pub(crate) use unnecessary_encode_utf8::{unnecessary_encode_utf8, UnnecessaryEncodeUTF8};
+pub(crate) use unnecessary_future_import::{unnecessary_future_import, UnnecessaryFutureImport};
+pub(crate) use unpack_list_comprehension::{unpack_list_comprehension, RewriteListComprehension};
+pub(crate) use use_pep585_annotation::{use_pep585_annotation, UsePEP585Annotation};
+pub(crate) use use_pep604_annotation::{use_pep604_annotation, UsePEP604Annotation};
+pub(crate) use useless_metaclass_type::{useless_metaclass_type, UselessMetaclassType};
+pub(crate) use useless_object_inheritance::{useless_object_inheritance, UselessObjectInheritance};
 
 mod convert_named_tuple_functional_to_class;
 mod convert_typed_dict_functional_to_class;

src/rules/pyupgrade/rules/native_literals.rs

@@ -1,13 +1,49 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Constant, Expr, ExprKind, Keyword};
 use rustpython_parser::lexer;
 use rustpython_parser::lexer::Tok;
+use serde::{Deserialize, Serialize};
+use std::fmt;
 
 use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
-use crate::violations::LiteralType;
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub enum LiteralType {
+    Str,
+    Bytes,
+}
+
+impl fmt::Display for LiteralType {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            LiteralType::Str => fmt.write_str("str"),
+            LiteralType::Bytes => fmt.write_str("bytes"),
+        }
+    }
+}
+
+define_violation!(
+    pub struct NativeLiterals {
+        pub literal_type: LiteralType,
+    }
+);
+impl AlwaysAutofixableViolation for NativeLiterals {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let NativeLiterals { literal_type } = self;
+        format!("Unnecessary call to `{literal_type}`")
+    }
+
+    fn autofix_title(&self) -> String {
+        let NativeLiterals { literal_type } = self;
+        format!("Replace with `{literal_type}`")
+    }
+}
 
 /// UP018
 pub fn native_literals(
@@ -25,7 +61,7 @@ pub fn native_literals(
 
     if (id == "str" || id == "bytes") && checker.is_builtin(id) {
         let Some(arg) = args.get(0) else {
-            let mut diagnostic = Diagnostic::new(violations::NativeLiterals{literal_type:if id == "str" {
+            let mut diagnostic = Diagnostic::new(NativeLiterals{literal_type:if id == "str" {
                 LiteralType::Str
             } else {
                 LiteralType::Bytes
@@ -94,7 +130,7 @@ pub fn native_literals(
         }
 
         let mut diagnostic = Diagnostic::new(
-            violations::NativeLiterals {
+            NativeLiterals {
                 literal_type: if id == "str" {
                     LiteralType::Str
                 } else {

src/rules/pyupgrade/rules/open_alias.rs

@@ -1,10 +1,26 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::Expr;
 
 use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct OpenAlias;
+);
+impl AlwaysAutofixableViolation for OpenAlias {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Use builtin `open`")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Replace with builtin `open`".to_string()
+    }
+}
 
 /// UP020
 pub fn open_alias(checker: &mut Checker, expr: &Expr, func: &Expr) {
@@ -12,7 +28,7 @@ pub fn open_alias(checker: &mut Checker, expr: &Expr, func: &Expr) {
         .resolve_call_path(func)
         .map_or(false, |call_path| call_path.as_slice() == ["io", "open"])
     {
-        let mut diagnostic = Diagnostic::new(violations::OpenAlias, Range::from_located(expr));
+        let mut diagnostic = Diagnostic::new(OpenAlias, Range::from_located(expr));
         if checker.patch(diagnostic.kind.rule()) {
             diagnostic.amend(Fix::replacement(
                 "open".to_string(),

src/rules/pyupgrade/rules/os_error_alias.rs

@@ -1,4 +1,7 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
 use itertools::Itertools;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Excepthandler, ExcepthandlerKind, Expr, ExprKind, Located};
 
 use crate::ast::helpers::compose_call_path;
@@ -6,7 +9,26 @@ use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct OSErrorAlias {
+        pub name: Option<String>,
+    }
+);
+impl AlwaysAutofixableViolation for OSErrorAlias {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Replace aliased errors with `OSError`")
+    }
+
+    fn autofix_title(&self) -> String {
+        let OSErrorAlias { name } = self;
+        match name {
+            None => "Replace with builtin `OSError`".to_string(),
+            Some(name) => format!("Replace `{name}` with builtin `OSError`"),
+        }
+    }
+}
 
 const ERROR_NAMES: &[&str] = &["EnvironmentError", "IOError", "WindowsError"];
 const ERROR_MODULES: &[&str] = &["mmap", "select", "socket"];
@@ -145,7 +167,7 @@ fn handle_making_changes(
             final_str.push(')');
         }
         let mut diagnostic = Diagnostic::new(
-            violations::OSErrorAlias {
+            OSErrorAlias {
                 name: compose_call_path(target),
             },
             Range::from_located(target),

src/rules/pyupgrade/rules/outdated_version_block.rs

@@ -1,3 +1,5 @@
+use ruff_macros::derive_message_formats;
+
 use std::cmp::Ordering;
 
 use log::error;
@@ -7,8 +9,6 @@ use rustpython_parser::ast::{Cmpop, Constant, Expr, ExprKind, Located, Stmt};
 use rustpython_parser::lexer;
 use rustpython_parser::lexer::Tok;
 
-use ruff_macros::derive_message_formats;
-
 use crate::ast::types::{Range, RefEquality};
 use crate::ast::whitespace::indentation;
 use crate::autofix::helpers::delete_stmt;

src/rules/pyupgrade/rules/printf_string_formatting.rs

@@ -1,3 +1,7 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
+
 use std::str::FromStr;
 
 use rustpython_ast::Location;
@@ -17,7 +21,20 @@ use crate::python::keyword::KWLIST;
 use crate::registry::Diagnostic;
 use crate::rules::pydocstyle::helpers::{leading_quote, trailing_quote};
 use crate::rules::pyupgrade::helpers::curly_escape;
-use crate::violations;
+
+define_violation!(
+    pub struct PrintfStringFormatting;
+);
+impl AlwaysAutofixableViolation for PrintfStringFormatting {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Use format specifiers instead of percent format")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Replace with format specifiers".to_string()
+    }
+}
 
 fn simplify_conversion_flag(flags: CConversionFlags) -> String {
     let mut flag_string = String::new();
@@ -406,10 +423,7 @@ pub(crate) fn printf_string_formatting(
     // Add the `.format` call.
     contents.push_str(&format!(".format{params_string}"));
 
-    let mut diagnostic = Diagnostic::new(
-        violations::PrintfStringFormatting,
-        Range::from_located(expr),
-    );
+    let mut diagnostic = Diagnostic::new(PrintfStringFormatting, Range::from_located(expr));
     if checker.patch(diagnostic.kind.rule()) {
         diagnostic.amend(Fix::replacement(
             contents,

src/rules/pyupgrade/rules/redundant_open_modes.rs

@@ -1,3 +1,7 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
+
 use std::str::FromStr;
 
 use anyhow::{anyhow, Result};
@@ -12,7 +16,34 @@ use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::{Diagnostic, Rule};
 use crate::source_code::Locator;
-use crate::violations;
+
+define_violation!(
+    pub struct RedundantOpenModes {
+        pub replacement: Option<String>,
+    }
+);
+impl AlwaysAutofixableViolation for RedundantOpenModes {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let RedundantOpenModes { replacement } = self;
+        match replacement {
+            None => format!("Unnecessary open mode parameters"),
+            Some(replacement) => {
+                format!("Unnecessary open mode parameters, use \"{replacement}\"")
+            }
+        }
+    }
+
+    fn autofix_title(&self) -> String {
+        let RedundantOpenModes { replacement } = self;
+        match replacement {
+            None => "Remove open mode parameters".to_string(),
+            Some(replacement) => {
+                format!("Replace with \"{replacement}\"")
+            }
+        }
+    }
+}
 
 const OPEN_FUNC_NAME: &str = "open";
 const MODE_KEYWORD_ARGUMENT: &str = "mode";
@@ -81,7 +112,7 @@ fn create_check(
     patch: bool,
 ) -> Diagnostic {
     let mut diagnostic = Diagnostic::new(
-        violations::RedundantOpenModes {
+        RedundantOpenModes {
             replacement: replacement_value.clone(),
         },
         Range::from_located(expr),

src/rules/pyupgrade/rules/replace_stdout_stderr.rs

@@ -1,3 +1,6 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Expr, Keyword};
 
 use crate::ast::helpers::find_keyword;
@@ -7,7 +10,20 @@ use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
 use crate::source_code::{Locator, Stylist};
-use crate::violations;
+
+define_violation!(
+    pub struct ReplaceStdoutStderr;
+);
+impl AlwaysAutofixableViolation for ReplaceStdoutStderr {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Sending stdout and stderr to pipe is deprecated, use `capture_output`")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Replace with `capture_output` keyword argument".to_string()
+    }
+}
 
 #[derive(Debug)]
 struct MiddleContent<'a> {
@@ -116,8 +132,7 @@ pub fn replace_stdout_stderr(checker: &mut Checker, expr: &Expr, kwargs: &[Keywo
             return;
         }
 
-        let mut diagnostic =
-            Diagnostic::new(violations::ReplaceStdoutStderr, Range::from_located(expr));
+        let mut diagnostic = Diagnostic::new(ReplaceStdoutStderr, Range::from_located(expr));
         if checker.patch(diagnostic.kind.rule()) {
             if let Some(fix) = generate_fix(checker.stylist, checker.locator, stdout, stderr) {
                 diagnostic.amend(fix);

src/rules/pyupgrade/rules/replace_universal_newlines.rs

@@ -1,3 +1,6 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Expr, Keyword, Location};
 
 use crate::ast::helpers::find_keyword;
@@ -5,7 +8,20 @@ use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct ReplaceUniversalNewlines;
+);
+impl AlwaysAutofixableViolation for ReplaceUniversalNewlines {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("`universal_newlines` is deprecated, use `text`")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Replace with `text` keyword argument".to_string()
+    }
+}
 
 /// UP021
 pub fn replace_universal_newlines(checker: &mut Checker, expr: &Expr, kwargs: &[Keyword]) {
@@ -20,7 +36,7 @@ pub fn replace_universal_newlines(checker: &mut Checker, expr: &Expr, kwargs: &[
                 kwarg.location.column() + "universal_newlines".len(),
             ),
         );
-        let mut diagnostic = Diagnostic::new(violations::ReplaceUniversalNewlines, range);
+        let mut diagnostic = Diagnostic::new(ReplaceUniversalNewlines, range);
         if checker.patch(diagnostic.kind.rule()) {
             diagnostic.amend(Fix::replacement(
                 "text".to_string(),

src/rules/pyupgrade/rules/rewrite_c_element_tree.rs

@@ -1,14 +1,29 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Located, Stmt, StmtKind};
 
 use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct RewriteCElementTree;
+);
+impl AlwaysAutofixableViolation for RewriteCElementTree {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("`cElementTree` is deprecated, use `ElementTree`")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Replace with `ElementTree`".to_string()
+    }
+}
 
 fn add_check_for_node<T>(checker: &mut Checker, node: &Located<T>) {
-    let mut diagnostic =
-        Diagnostic::new(violations::RewriteCElementTree, Range::from_located(node));
+    let mut diagnostic = Diagnostic::new(RewriteCElementTree, Range::from_located(node));
     if checker.patch(diagnostic.kind.rule()) {
         let contents = checker
             .locator

src/rules/pyupgrade/rules/rewrite_mock_import.rs

@@ -1,10 +1,14 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
 use anyhow::Result;
 use libcst_native::{
     AsName, AssignTargetExpression, Attribute, Codegen, CodegenState, Dot, Expression, Import,
     ImportAlias, ImportFrom, ImportNames, Name, NameOrAttribute, ParenthesizableWhitespace,
 };
 use log::error;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Expr, ExprKind, Stmt, StmtKind};
+use serde::{Deserialize, Serialize};
 
 use crate::ast::helpers::collect_call_path;
 use crate::ast::types::Range;
@@ -14,8 +18,32 @@ use crate::cst::matchers::{match_import, match_import_from, match_module};
 use crate::fix::Fix;
 use crate::registry::{Diagnostic, Rule};
 use crate::source_code::{Locator, Stylist};
-use crate::violations;
-use crate::violations::MockReference;
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub enum MockReference {
+    Import,
+    Attribute,
+}
+
+define_violation!(
+    pub struct RewriteMockImport {
+        pub reference_type: MockReference,
+    }
+);
+impl AlwaysAutofixableViolation for RewriteMockImport {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("`mock` is deprecated, use `unittest.mock`")
+    }
+
+    fn autofix_title(&self) -> String {
+        let RewriteMockImport { reference_type } = self;
+        match reference_type {
+            MockReference::Import => "Import from `unittest.mock` instead".to_string(),
+            MockReference::Attribute => "Replace `mock.mock` with `mock`".to_string(),
+        }
+    }
+}
 
 /// Return a vector of all non-`mock` imports.
 fn clean_import_aliases(aliases: Vec<ImportAlias>) -> (Vec<ImportAlias>, Vec<Option<AsName>>) {
@@ -209,7 +237,7 @@ pub fn rewrite_mock_attribute(checker: &mut Checker, expr: &Expr) {
     if let ExprKind::Attribute { value, .. } = &expr.node {
         if collect_call_path(value).as_slice() == ["mock", "mock"] {
             let mut diagnostic = Diagnostic::new(
-                violations::RewriteMockImport {
+                RewriteMockImport {
                     reference_type: MockReference::Attribute,
                 },
                 Range::from_located(value),
@@ -256,7 +284,7 @@ pub fn rewrite_mock_import(checker: &mut Checker, stmt: &Stmt) {
                 for name in names {
                     if name.node.name == "mock" || name.node.name == "mock.mock" {
                         let mut diagnostic = Diagnostic::new(
-                            violations::RewriteMockImport {
+                            RewriteMockImport {
                                 reference_type: MockReference::Import,
                             },
                             Range::from_located(name),
@@ -284,7 +312,7 @@ pub fn rewrite_mock_import(checker: &mut Checker, stmt: &Stmt) {
 
             if module == "mock" {
                 let mut diagnostic = Diagnostic::new(
-                    violations::RewriteMockImport {
+                    RewriteMockImport {
                         reference_type: MockReference::Import,
                     },
                     Range::from_located(stmt),

src/rules/pyupgrade/rules/rewrite_unicode_literal.rs

@@ -1,17 +1,32 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Expr, Location};
 
 use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct RewriteUnicodeLiteral;
+);
+impl AlwaysAutofixableViolation for RewriteUnicodeLiteral {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Remove unicode literals from strings")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Remove unicode prefix".to_string()
+    }
+}
 
 /// UP025
 pub fn rewrite_unicode_literal(checker: &mut Checker, expr: &Expr, kind: Option<&str>) {
     if let Some(const_kind) = kind {
         if const_kind.to_lowercase() == "u" {
-            let mut diagnostic =
-                Diagnostic::new(violations::RewriteUnicodeLiteral, Range::from_located(expr));
+            let mut diagnostic = Diagnostic::new(RewriteUnicodeLiteral, Range::from_located(expr));
             if checker.patch(diagnostic.kind.rule()) {
                 diagnostic.amend(Fix::deletion(
                     expr.location,

src/rules/pyupgrade/rules/rewrite_yield_from.rs

@@ -1,3 +1,6 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustc_hash::FxHashMap;
 use rustpython_ast::{Expr, ExprContext, ExprKind, Stmt, StmtKind};
 
@@ -7,7 +10,20 @@ use crate::ast::visitor::Visitor;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct RewriteYieldFrom;
+);
+impl AlwaysAutofixableViolation for RewriteYieldFrom {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Replace `yield` over `for` loop with `yield from`")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Replace with `yield from`".to_string()
+    }
+}
 
 /// Return `true` if the two expressions are equivalent, and consistent solely
 /// of tuples and names.
@@ -157,8 +173,7 @@ pub fn rewrite_yield_from(checker: &mut Checker, stmt: &Stmt) {
                 continue;
             }
 
-            let mut diagnostic =
-                Diagnostic::new(violations::RewriteYieldFrom, Range::from_located(item.stmt));
+            let mut diagnostic = Diagnostic::new(RewriteYieldFrom, Range::from_located(item.stmt));
             if checker.patch(diagnostic.kind.rule()) {
                 let contents = checker
                     .locator

src/rules/pyupgrade/rules/super_args.rs

@@ -1,7 +1,10 @@
 use crate::ast::helpers;
 use crate::ast::types::{Range, Scope, ScopeKind};
+
 use crate::registry::Diagnostic;
-use crate::violations;
+
+use crate::rules::pyupgrade::rules::SuperCallWithParameters;
+
 use rustpython_ast::{ArgData, Expr, ExprKind, Stmt, StmtKind};
 
 /// UP008
@@ -68,7 +71,7 @@ pub fn super_args(
 
     if first_arg_id == parent_name && second_arg_id == parent_arg {
         return Some(Diagnostic::new(
-            violations::SuperCallWithParameters,
+            SuperCallWithParameters,
             Range::from_located(expr),
         ));
     }

src/rules/pyupgrade/rules/super_call_with_parameters.rs

@@ -1,9 +1,26 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Expr, Stmt};
 
 use super::super::fixes;
 use crate::ast::helpers;
 use crate::checkers::ast::Checker;
 
+define_violation!(
+    pub struct SuperCallWithParameters;
+);
+impl AlwaysAutofixableViolation for SuperCallWithParameters {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Use `super()` instead of `super(__class__, self)`")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Remove `__super__` parameters".to_string()
+    }
+}
+
 /// UP008
 pub fn super_call_with_parameters(checker: &mut Checker, expr: &Expr, func: &Expr, args: &[Expr]) {
     // Only bother going through the super check at all if we're in a `super` call.

src/rules/pyupgrade/rules/type_of_primitive.rs

@@ -1,3 +1,6 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Expr, ExprKind};
 
 use super::super::types::Primitive;
@@ -5,7 +8,24 @@ use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct TypeOfPrimitive {
+        pub primitive: Primitive,
+    }
+);
+impl AlwaysAutofixableViolation for TypeOfPrimitive {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let TypeOfPrimitive { primitive } = self;
+        format!("Use `{}` instead of `type(...)`", primitive.builtin())
+    }
+
+    fn autofix_title(&self) -> String {
+        let TypeOfPrimitive { primitive } = self;
+        format!("Replace `type(...)` with `{}`", primitive.builtin())
+    }
+}
 
 /// UP003
 pub fn type_of_primitive(checker: &mut Checker, expr: &Expr, func: &Expr, args: &[Expr]) {
@@ -24,10 +44,7 @@ pub fn type_of_primitive(checker: &mut Checker, expr: &Expr, func: &Expr, args:
     let Some(primitive) = Primitive::from_constant(value) else {
         return;
     };
-    let mut diagnostic = Diagnostic::new(
-        violations::TypeOfPrimitive { primitive },
-        Range::from_located(expr),
-    );
+    let mut diagnostic = Diagnostic::new(TypeOfPrimitive { primitive }, Range::from_located(expr));
     if checker.patch(diagnostic.kind.rule()) {
         diagnostic.amend(Fix::replacement(
             primitive.builtin(),

src/rules/pyupgrade/rules/typing_text_str_alias.rs

@@ -1,18 +1,33 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::Expr;
 
 use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct TypingTextStrAlias;
+);
+impl AlwaysAutofixableViolation for TypingTextStrAlias {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("`typing.Text` is deprecated, use `str`")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Replace with `str`".to_string()
+    }
+}
 
 /// UP019
 pub fn typing_text_str_alias(checker: &mut Checker, expr: &Expr) {
     if checker.resolve_call_path(expr).map_or(false, |call_path| {
         call_path.as_slice() == ["typing", "Text"]
     }) {
-        let mut diagnostic =
-            Diagnostic::new(violations::TypingTextStrAlias, Range::from_located(expr));
+        let mut diagnostic = Diagnostic::new(TypingTextStrAlias, Range::from_located(expr));
         if checker.patch(diagnostic.kind.rule()) {
             diagnostic.amend(Fix::replacement(
                 "str".to_string(),

src/rules/pyupgrade/rules/unnecessary_builtin_import.rs

@@ -1,12 +1,38 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
 use itertools::Itertools;
 use log::error;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Alias, AliasData, Located};
 use rustpython_parser::ast::Stmt;
 
 use crate::ast::types::Range;
+use crate::autofix;
 use crate::checkers::ast::Checker;
 use crate::registry::Diagnostic;
-use crate::{autofix, violations};
+
+define_violation!(
+    pub struct UnnecessaryBuiltinImport {
+        pub names: Vec<String>,
+    }
+);
+impl AlwaysAutofixableViolation for UnnecessaryBuiltinImport {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let UnnecessaryBuiltinImport { names } = self;
+        if names.len() == 1 {
+            let import = &names[0];
+            format!("Unnecessary builtin import: `{import}`")
+        } else {
+            let imports = names.iter().map(|name| format!("`{name}`")).join(", ");
+            format!("Unnecessary builtin imports: {imports}")
+        }
+    }
+
+    fn autofix_title(&self) -> String {
+        "Remove unnecessary builtin import".to_string()
+    }
+}
 
 const BUILTINS: &[&str] = &[
     "*",
@@ -69,7 +95,7 @@ pub fn unnecessary_builtin_import(
         return;
     }
     let mut diagnostic = Diagnostic::new(
-        violations::UnnecessaryBuiltinImport {
+        UnnecessaryBuiltinImport {
             names: unused_imports
                 .iter()
                 .map(|alias| alias.node.name.to_string())

src/rules/pyupgrade/rules/unnecessary_coding_comment.rs

@@ -1,11 +1,28 @@
 use crate::ast::types::Range;
+use crate::define_violation;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+use crate::violation::AlwaysAutofixableViolation;
+
 use once_cell::sync::Lazy;
 use regex::Regex;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::Location;
 
+define_violation!(
+    pub struct PEP3120UnnecessaryCodingComment;
+);
+impl AlwaysAutofixableViolation for PEP3120UnnecessaryCodingComment {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("UTF-8 encoding declaration is unnecessary")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Remove unnecessary coding comment".to_string()
+    }
+}
+
 // Regex from PEP263.
 static CODING_COMMENT_REGEX: Lazy<Regex> =
     Lazy::new(|| Regex::new(r"^[ \t\f]*#.*?coding[:=][ \t]*utf-?8").unwrap());
@@ -15,7 +32,7 @@ pub fn unnecessary_coding_comment(lineno: usize, line: &str, autofix: bool) -> O
     // PEP3120 makes utf-8 the default encoding.
     if CODING_COMMENT_REGEX.is_match(line) {
         let mut diagnostic = Diagnostic::new(
-            violations::PEP3120UnnecessaryCodingComment,
+            PEP3120UnnecessaryCodingComment,
             Range::new(Location::new(lineno + 1, 0), Location::new(lineno + 2, 0)),
         );
         if autofix {

src/rules/pyupgrade/rules/unnecessary_encode_utf8.rs

@@ -1,3 +1,6 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Constant, Expr, ExprKind, Keyword};
 
 use crate::ast::types::Range;
@@ -5,7 +8,20 @@ use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::{Diagnostic, Rule};
 use crate::source_code::Locator;
-use crate::violations;
+
+define_violation!(
+    pub struct UnnecessaryEncodeUTF8;
+);
+impl AlwaysAutofixableViolation for UnnecessaryEncodeUTF8 {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Unnecessary call to `encode` as UTF-8")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Remove unnecessary `encode`".to_string()
+    }
+}
 
 const UTF8_LITERALS: &[&str] = &["utf-8", "utf8", "utf_8", "u8", "utf", "cp65001"];
 
@@ -60,15 +76,13 @@ fn delete_default_encode_arg_or_kwarg(
     patch: bool,
 ) -> Option<Diagnostic> {
     if let Some(arg) = args.get(0) {
-        let mut diagnostic =
-            Diagnostic::new(violations::UnnecessaryEncodeUTF8, Range::from_located(expr));
+        let mut diagnostic = Diagnostic::new(UnnecessaryEncodeUTF8, Range::from_located(expr));
         if patch {
             diagnostic.amend(Fix::deletion(arg.location, arg.end_location.unwrap()));
         }
         Some(diagnostic)
     } else if let Some(kwarg) = kwargs.get(0) {
-        let mut diagnostic =
-            Diagnostic::new(violations::UnnecessaryEncodeUTF8, Range::from_located(expr));
+        let mut diagnostic = Diagnostic::new(UnnecessaryEncodeUTF8, Range::from_located(expr));
         if patch {
             diagnostic.amend(Fix::deletion(kwarg.location, kwarg.end_location.unwrap()));
         }
@@ -85,8 +99,7 @@ fn replace_with_bytes_literal(
     locator: &Locator,
     patch: bool,
 ) -> Diagnostic {
-    let mut diagnostic =
-        Diagnostic::new(violations::UnnecessaryEncodeUTF8, Range::from_located(expr));
+    let mut diagnostic = Diagnostic::new(UnnecessaryEncodeUTF8, Range::from_located(expr));
     if patch {
         let content = locator.slice_source_code_range(&Range::new(
             constant.location,

src/rules/pyupgrade/rules/unnecessary_future_import.rs

@@ -1,12 +1,38 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
 use itertools::Itertools;
 use log::error;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Alias, AliasData, Located};
 use rustpython_parser::ast::Stmt;
 
 use crate::ast::types::Range;
+use crate::autofix;
 use crate::checkers::ast::Checker;
 use crate::registry::Diagnostic;
-use crate::{autofix, violations};
+
+define_violation!(
+    pub struct UnnecessaryFutureImport {
+        pub names: Vec<String>,
+    }
+);
+impl AlwaysAutofixableViolation for UnnecessaryFutureImport {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let UnnecessaryFutureImport { names } = self;
+        if names.len() == 1 {
+            let import = &names[0];
+            format!("Unnecessary `__future__` import `{import}` for target Python version")
+        } else {
+            let imports = names.iter().map(|name| format!("`{name}`")).join(", ");
+            format!("Unnecessary `__future__` imports {imports} for target Python version")
+        }
+    }
+
+    fn autofix_title(&self) -> String {
+        "Remove unnecessary `__future__` import".to_string()
+    }
+}
 
 const PY33_PLUS_REMOVE_FUTURES: &[&str] = &[
     "nested_scopes",
@@ -49,7 +75,7 @@ pub fn unnecessary_future_import(checker: &mut Checker, stmt: &Stmt, names: &[Lo
         return;
     }
     let mut diagnostic = Diagnostic::new(
-        violations::UnnecessaryFutureImport {
+        UnnecessaryFutureImport {
             names: unused_imports
                 .iter()
                 .map(|alias| alias.node.name.to_string())

src/rules/pyupgrade/rules/unpack_list_comprehension.rs

@@ -1,10 +1,26 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Expr, ExprKind};
 
 use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct RewriteListComprehension;
+);
+impl AlwaysAutofixableViolation for RewriteListComprehension {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Replace unpacked list comprehension with a generator expression")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Replace with generator expression".to_string()
+    }
+}
 
 /// Returns `true` if `expr` contains an `ExprKind::Await`.
 fn contains_await(expr: &Expr) -> bool {
@@ -79,10 +95,8 @@ pub fn unpack_list_comprehension(checker: &mut Checker, targets: &[Expr], value:
                 return;
             }
 
-            let mut diagnostic = Diagnostic::new(
-                violations::RewriteListComprehension,
-                Range::from_located(value),
-            );
+            let mut diagnostic =
+                Diagnostic::new(RewriteListComprehension, Range::from_located(value));
             if checker.patch(diagnostic.kind.rule()) {
                 let existing = checker
                     .locator

src/rules/pyupgrade/rules/use_pep585_annotation.rs

@@ -1,10 +1,34 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::Expr;
 
 use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct UsePEP585Annotation {
+        pub name: String,
+    }
+);
+impl AlwaysAutofixableViolation for UsePEP585Annotation {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let UsePEP585Annotation { name } = self;
+        format!(
+            "Use `{}` instead of `{}` for type annotations",
+            name.to_lowercase(),
+            name,
+        )
+    }
+
+    fn autofix_title(&self) -> String {
+        let UsePEP585Annotation { name } = self;
+        format!("Replace `{name}` with `{}`", name.to_lowercase(),)
+    }
+}
 
 /// UP006
 pub fn use_pep585_annotation(checker: &mut Checker, expr: &Expr) {
@@ -13,7 +37,7 @@ pub fn use_pep585_annotation(checker: &mut Checker, expr: &Expr) {
         .and_then(|call_path| call_path.last().copied())
     {
         let mut diagnostic = Diagnostic::new(
-            violations::UsePEP585Annotation {
+            UsePEP585Annotation {
                 name: binding.to_string(),
             },
             Range::from_located(expr),

src/rules/pyupgrade/rules/use_pep604_annotation.rs

@@ -1,3 +1,6 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Constant, Expr, ExprKind, Location, Operator};
 
 use crate::ast::helpers::unparse_expr;
@@ -5,7 +8,20 @@ use crate::ast::types::Range;
 use crate::checkers::ast::Checker;
 use crate::fix::Fix;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct UsePEP604Annotation;
+);
+impl AlwaysAutofixableViolation for UsePEP604Annotation {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Use `X | Y` for type annotations")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Convert to `X | Y`".to_string()
+    }
+}
 
 fn optional(expr: &Expr) -> Expr {
     Expr::new(
@@ -80,8 +96,7 @@ pub fn use_pep604_annotation(checker: &mut Checker, expr: &Expr, value: &Expr, s
 
     match typing_member {
         TypingMember::Optional => {
-            let mut diagnostic =
-                Diagnostic::new(violations::UsePEP604Annotation, Range::from_located(expr));
+            let mut diagnostic = Diagnostic::new(UsePEP604Annotation, Range::from_located(expr));
             if checker.patch(diagnostic.kind.rule()) {
                 diagnostic.amend(Fix::replacement(
                     unparse_expr(&optional(slice), checker.stylist),
@@ -92,8 +107,7 @@ pub fn use_pep604_annotation(checker: &mut Checker, expr: &Expr, value: &Expr, s
             checker.diagnostics.push(diagnostic);
         }
         TypingMember::Union => {
-            let mut diagnostic =
-                Diagnostic::new(violations::UsePEP604Annotation, Range::from_located(expr));
+            let mut diagnostic = Diagnostic::new(UsePEP604Annotation, Range::from_located(expr));
             if checker.patch(diagnostic.kind.rule()) {
                 match &slice.node {
                     ExprKind::Slice { .. } => {

src/rules/pyupgrade/rules/useless_metaclass_type.rs

@@ -1,11 +1,27 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
 use log::error;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Expr, ExprKind, Stmt};
 
 use crate::ast::types::Range;
 use crate::autofix::helpers;
 use crate::checkers::ast::Checker;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct UselessMetaclassType;
+);
+impl AlwaysAutofixableViolation for UselessMetaclassType {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("`__metaclass__ = type` is implied")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Remove `__metaclass__ = type`".to_string()
+    }
+}
 
 fn rule(targets: &[Expr], value: &Expr, location: Range) -> Option<Diagnostic> {
     if targets.len() != 1 {
@@ -23,7 +39,7 @@ fn rule(targets: &[Expr], value: &Expr, location: Range) -> Option<Diagnostic> {
     if id != "type" {
         return None;
     }
-    Some(Diagnostic::new(violations::UselessMetaclassType, location))
+    Some(Diagnostic::new(UselessMetaclassType, location))
 }
 
 /// UP001

src/rules/pyupgrade/rules/useless_object_inheritance.rs

@@ -1,10 +1,29 @@
+use crate::define_violation;
+use crate::violation::AlwaysAutofixableViolation;
+use ruff_macros::derive_message_formats;
 use rustpython_ast::{Expr, ExprKind, Keyword, Stmt};
 
 use super::super::fixes;
 use crate::ast::types::{Binding, BindingKind, Range, Scope};
 use crate::checkers::ast::Checker;
 use crate::registry::Diagnostic;
-use crate::violations;
+
+define_violation!(
+    pub struct UselessObjectInheritance {
+        pub name: String,
+    }
+);
+impl AlwaysAutofixableViolation for UselessObjectInheritance {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let UselessObjectInheritance { name } = self;
+        format!("Class `{name}` inherits from `object`")
+    }
+
+    fn autofix_title(&self) -> String {
+        "Remove `object` inheritance".to_string()
+    }
+}
 
 fn rule(name: &str, bases: &[Expr], scope: &Scope, bindings: &[Binding]) -> Option<Diagnostic> {
     for expr in bases {
@@ -27,7 +46,7 @@ fn rule(name: &str, bases: &[Expr], scope: &Scope, bindings: &[Binding]) -> Opti
             continue;
         }
         return Some(Diagnostic::new(
-            violations::UselessObjectInheritance {
+            UselessObjectInheritance {
                 name: name.to_string(),
             },
             Range::from_located(expr),

src/violations.rs

@@ -8,7 +8,7 @@ use serde::{Deserialize, Serialize};
 
 use crate::define_violation;
 use crate::rules::flake8_debugger::types::DebuggerUsingType;
-use crate::rules::pyupgrade::types::Primitive;
+
 use crate::violation::{AlwaysAutofixableViolation, AutofixKind, Availability, Violation};
 
 // pylint
@@ -1176,561 +1176,6 @@ impl Violation for UnpackInsteadOfConcatenatingToCollectionLiteral {
     }
 }
 
-// pyupgrade
-
-define_violation!(
-    pub struct UselessMetaclassType;
-);
-impl AlwaysAutofixableViolation for UselessMetaclassType {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("`__metaclass__ = type` is implied")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Remove `__metaclass__ = type`".to_string()
-    }
-}
-
-define_violation!(
-    pub struct TypeOfPrimitive {
-        pub primitive: Primitive,
-    }
-);
-impl AlwaysAutofixableViolation for TypeOfPrimitive {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        let TypeOfPrimitive { primitive } = self;
-        format!("Use `{}` instead of `type(...)`", primitive.builtin())
-    }
-
-    fn autofix_title(&self) -> String {
-        let TypeOfPrimitive { primitive } = self;
-        format!("Replace `type(...)` with `{}`", primitive.builtin())
-    }
-}
-
-define_violation!(
-    pub struct UselessObjectInheritance {
-        pub name: String,
-    }
-);
-impl AlwaysAutofixableViolation for UselessObjectInheritance {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        let UselessObjectInheritance { name } = self;
-        format!("Class `{name}` inherits from `object`")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Remove `object` inheritance".to_string()
-    }
-}
-
-define_violation!(
-    pub struct DeprecatedUnittestAlias {
-        pub alias: String,
-        pub target: String,
-    }
-);
-impl AlwaysAutofixableViolation for DeprecatedUnittestAlias {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        let DeprecatedUnittestAlias { alias, target } = self;
-        format!("`{alias}` is deprecated, use `{target}`")
-    }
-
-    fn autofix_title(&self) -> String {
-        let DeprecatedUnittestAlias { alias, target } = self;
-        format!("Replace `{target}` with `{alias}`")
-    }
-}
-
-define_violation!(
-    pub struct UsePEP585Annotation {
-        pub name: String,
-    }
-);
-impl AlwaysAutofixableViolation for UsePEP585Annotation {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        let UsePEP585Annotation { name } = self;
-        format!(
-            "Use `{}` instead of `{}` for type annotations",
-            name.to_lowercase(),
-            name,
-        )
-    }
-
-    fn autofix_title(&self) -> String {
-        let UsePEP585Annotation { name } = self;
-        format!("Replace `{name}` with `{}`", name.to_lowercase(),)
-    }
-}
-
-define_violation!(
-    pub struct UsePEP604Annotation;
-);
-impl AlwaysAutofixableViolation for UsePEP604Annotation {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Use `X | Y` for type annotations")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Convert to `X | Y`".to_string()
-    }
-}
-
-define_violation!(
-    pub struct SuperCallWithParameters;
-);
-impl AlwaysAutofixableViolation for SuperCallWithParameters {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Use `super()` instead of `super(__class__, self)`")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Remove `__super__` parameters".to_string()
-    }
-}
-
-define_violation!(
-    pub struct PEP3120UnnecessaryCodingComment;
-);
-impl AlwaysAutofixableViolation for PEP3120UnnecessaryCodingComment {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("UTF-8 encoding declaration is unnecessary")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Remove unnecessary coding comment".to_string()
-    }
-}
-
-define_violation!(
-    pub struct UnnecessaryFutureImport {
-        pub names: Vec<String>,
-    }
-);
-impl AlwaysAutofixableViolation for UnnecessaryFutureImport {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        let UnnecessaryFutureImport { names } = self;
-        if names.len() == 1 {
-            let import = &names[0];
-            format!("Unnecessary `__future__` import `{import}` for target Python version")
-        } else {
-            let imports = names.iter().map(|name| format!("`{name}`")).join(", ");
-            format!("Unnecessary `__future__` imports {imports} for target Python version")
-        }
-    }
-
-    fn autofix_title(&self) -> String {
-        "Remove unnecessary `__future__` import".to_string()
-    }
-}
-
-define_violation!(
-    pub struct LRUCacheWithoutParameters;
-);
-impl AlwaysAutofixableViolation for LRUCacheWithoutParameters {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Unnecessary parameters to `functools.lru_cache`")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Remove unnecessary parameters".to_string()
-    }
-}
-
-define_violation!(
-    pub struct UnnecessaryEncodeUTF8;
-);
-impl AlwaysAutofixableViolation for UnnecessaryEncodeUTF8 {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Unnecessary call to `encode` as UTF-8")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Remove unnecessary `encode`".to_string()
-    }
-}
-
-define_violation!(
-    pub struct ConvertTypedDictFunctionalToClass {
-        pub name: String,
-    }
-);
-impl AlwaysAutofixableViolation for ConvertTypedDictFunctionalToClass {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        let ConvertTypedDictFunctionalToClass { name } = self;
-        format!("Convert `{name}` from `TypedDict` functional to class syntax")
-    }
-
-    fn autofix_title(&self) -> String {
-        let ConvertTypedDictFunctionalToClass { name } = self;
-        format!("Convert `{name}` to class syntax")
-    }
-}
-
-define_violation!(
-    pub struct ConvertNamedTupleFunctionalToClass {
-        pub name: String,
-    }
-);
-impl AlwaysAutofixableViolation for ConvertNamedTupleFunctionalToClass {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        let ConvertNamedTupleFunctionalToClass { name } = self;
-        format!("Convert `{name}` from `NamedTuple` functional to class syntax")
-    }
-
-    fn autofix_title(&self) -> String {
-        let ConvertNamedTupleFunctionalToClass { name } = self;
-        format!("Convert `{name}` to class syntax")
-    }
-}
-
-define_violation!(
-    pub struct RedundantOpenModes {
-        pub replacement: Option<String>,
-    }
-);
-impl AlwaysAutofixableViolation for RedundantOpenModes {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        let RedundantOpenModes { replacement } = self;
-        match replacement {
-            None => format!("Unnecessary open mode parameters"),
-            Some(replacement) => {
-                format!("Unnecessary open mode parameters, use \"{replacement}\"")
-            }
-        }
-    }
-
-    fn autofix_title(&self) -> String {
-        let RedundantOpenModes { replacement } = self;
-        match replacement {
-            None => "Remove open mode parameters".to_string(),
-            Some(replacement) => {
-                format!("Replace with \"{replacement}\"")
-            }
-        }
-    }
-}
-
-define_violation!(
-    pub struct DatetimeTimezoneUTC {
-        pub straight_import: bool,
-    }
-);
-impl Violation for DatetimeTimezoneUTC {
-    const AUTOFIX: Option<AutofixKind> = Some(AutofixKind::new(Availability::Always));
-
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Use `datetime.UTC` alias")
-    }
-
-    fn autofix_title_formatter(&self) -> Option<fn(&Self) -> String> {
-        if self.straight_import {
-            Some(|_| "Convert to `datetime.UTC` alias".to_string())
-        } else {
-            None
-        }
-    }
-}
-
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
-pub enum LiteralType {
-    Str,
-    Bytes,
-}
-
-impl fmt::Display for LiteralType {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        match self {
-            LiteralType::Str => fmt.write_str("str"),
-            LiteralType::Bytes => fmt.write_str("bytes"),
-        }
-    }
-}
-
-define_violation!(
-    pub struct NativeLiterals {
-        pub literal_type: LiteralType,
-    }
-);
-impl AlwaysAutofixableViolation for NativeLiterals {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        let NativeLiterals { literal_type } = self;
-        format!("Unnecessary call to `{literal_type}`")
-    }
-
-    fn autofix_title(&self) -> String {
-        let NativeLiterals { literal_type } = self;
-        format!("Replace with `{literal_type}`")
-    }
-}
-
-define_violation!(
-    pub struct TypingTextStrAlias;
-);
-impl AlwaysAutofixableViolation for TypingTextStrAlias {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("`typing.Text` is deprecated, use `str`")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Replace with `str`".to_string()
-    }
-}
-
-define_violation!(
-    pub struct OpenAlias;
-);
-impl AlwaysAutofixableViolation for OpenAlias {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Use builtin `open`")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Replace with builtin `open`".to_string()
-    }
-}
-
-define_violation!(
-    pub struct ReplaceUniversalNewlines;
-);
-impl AlwaysAutofixableViolation for ReplaceUniversalNewlines {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("`universal_newlines` is deprecated, use `text`")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Replace with `text` keyword argument".to_string()
-    }
-}
-
-define_violation!(
-    pub struct PrintfStringFormatting;
-);
-impl AlwaysAutofixableViolation for PrintfStringFormatting {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Use format specifiers instead of percent format")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Replace with format specifiers".to_string()
-    }
-}
-
-define_violation!(
-    pub struct ReplaceStdoutStderr;
-);
-impl AlwaysAutofixableViolation for ReplaceStdoutStderr {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Sending stdout and stderr to pipe is deprecated, use `capture_output`")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Replace with `capture_output` keyword argument".to_string()
-    }
-}
-
-define_violation!(
-    pub struct RewriteCElementTree;
-);
-impl AlwaysAutofixableViolation for RewriteCElementTree {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("`cElementTree` is deprecated, use `ElementTree`")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Replace with `ElementTree`".to_string()
-    }
-}
-
-define_violation!(
-    pub struct OSErrorAlias {
-        pub name: Option<String>,
-    }
-);
-impl AlwaysAutofixableViolation for OSErrorAlias {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Replace aliased errors with `OSError`")
-    }
-
-    fn autofix_title(&self) -> String {
-        let OSErrorAlias { name } = self;
-        match name {
-            None => "Replace with builtin `OSError`".to_string(),
-            Some(name) => format!("Replace `{name}` with builtin `OSError`"),
-        }
-    }
-}
-
-define_violation!(
-    pub struct RewriteUnicodeLiteral;
-);
-impl AlwaysAutofixableViolation for RewriteUnicodeLiteral {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Remove unicode literals from strings")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Remove unicode prefix".to_string()
-    }
-}
-
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
-pub enum MockReference {
-    Import,
-    Attribute,
-}
-
-define_violation!(
-    pub struct RewriteMockImport {
-        pub reference_type: MockReference,
-    }
-);
-impl AlwaysAutofixableViolation for RewriteMockImport {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("`mock` is deprecated, use `unittest.mock`")
-    }
-
-    fn autofix_title(&self) -> String {
-        let RewriteMockImport { reference_type } = self;
-        match reference_type {
-            MockReference::Import => "Import from `unittest.mock` instead".to_string(),
-            MockReference::Attribute => "Replace `mock.mock` with `mock`".to_string(),
-        }
-    }
-}
-
-define_violation!(
-    pub struct RewriteListComprehension;
-);
-impl AlwaysAutofixableViolation for RewriteListComprehension {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Replace unpacked list comprehension with a generator expression")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Replace with generator expression".to_string()
-    }
-}
-
-define_violation!(
-    pub struct RewriteYieldFrom;
-);
-impl AlwaysAutofixableViolation for RewriteYieldFrom {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Replace `yield` over `for` loop with `yield from`")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Replace with `yield from`".to_string()
-    }
-}
-
-define_violation!(
-    pub struct UnnecessaryBuiltinImport {
-        pub names: Vec<String>,
-    }
-);
-impl AlwaysAutofixableViolation for UnnecessaryBuiltinImport {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        let UnnecessaryBuiltinImport { names } = self;
-        if names.len() == 1 {
-            let import = &names[0];
-            format!("Unnecessary builtin import: `{import}`")
-        } else {
-            let imports = names.iter().map(|name| format!("`{name}`")).join(", ");
-            format!("Unnecessary builtin imports: {imports}")
-        }
-    }
-
-    fn autofix_title(&self) -> String {
-        "Remove unnecessary builtin import".to_string()
-    }
-}
-
-define_violation!(
-    pub struct FormatLiterals;
-);
-impl AlwaysAutofixableViolation for FormatLiterals {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Use implicit references for positional format fields")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Remove explicit positional indexes".to_string()
-    }
-}
-
-define_violation!(
-    pub struct ExtraneousParentheses;
-);
-impl AlwaysAutofixableViolation for ExtraneousParentheses {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Avoid extraneous parentheses")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Remove extraneous parentheses".to_string()
-    }
-}
-
-define_violation!(
-    pub struct FString;
-);
-impl AlwaysAutofixableViolation for FString {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Use f-string instead of `format` call")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Convert to f-string".to_string()
-    }
-}
-
-define_violation!(
-    pub struct FunctoolsCache;
-);
-impl AlwaysAutofixableViolation for FunctoolsCache {
-    #[derive_message_formats]
-    fn message(&self) -> String {
-        format!("Use `@functools.cache` instead of `@functools.lru_cache(maxsize=None)`")
-    }
-
-    fn autofix_title(&self) -> String {
-        "Rewrite with `@functools.cache".to_string()
-    }
-}
-
 // pydocstyle
 
 define_violation!(