clippy_lints/src/lib.rs

   1 // error-pattern:cargo-clippy
   2
   3 #![feature(box_syntax)]
   4 #![feature(rustc_private)]
   5 #![feature(slice_patterns)]
   6 #![feature(stmt_expr_attributes)]
   7 #![feature(range_contains)]
   8 #![feature(macro_vis_matcher)]
   9 #![allow(unknown_lints, shadow_reuse, missing_docs_in_private_items)]
  10 #![recursion_limit = "256"]
  11 #![allow(stable_features)]
  12 #![feature(iterator_find_map)]
  13 #![feature(macro_at_most_once_rep)]
  14 #![feature(tool_attributes)]
  15 #![feature(rust_2018_preview)]
  16 #![warn(rust_2018_idioms)]
  17
  18 use toml;
  19 use rustc_plugin;
  20 use rustc;
  21
  22
  23 macro_rules! declare_clippy_lint {
  24     { pub $name:tt, style, $description:tt } => {
  25         declare_lint! { pub $name, Warn, $description, report_in_external_macro: true }
  26     };
  27     { pub $name:tt, correctness, $description:tt } => {
  28         declare_lint! { pub $name, Deny, $description, report_in_external_macro: true }
  29     };
  30     { pub $name:tt, complexity, $description:tt } => {
  31         declare_lint! { pub $name, Warn, $description, report_in_external_macro: true }
  32     };
  33     { pub $name:tt, perf, $description:tt } => {
  34         declare_lint! { pub $name, Warn, $description, report_in_external_macro: true }
  35     };
  36     { pub $name:tt, pedantic, $description:tt } => {
  37         declare_lint! { pub $name, Allow, $description, report_in_external_macro: true }
  38     };
  39     { pub $name:tt, restriction, $description:tt } => {
  40         declare_lint! { pub $name, Allow, $description, report_in_external_macro: true }
  41     };
  42     { pub $name:tt, cargo, $description:tt } => {
  43         declare_lint! { pub $name, Allow, $description, report_in_external_macro: true }
  44     };
  45     { pub $name:tt, nursery, $description:tt } => {
  46         declare_lint! { pub $name, Allow, $description, report_in_external_macro: true }
  47     };
  48     { pub $name:tt, internal, $description:tt } => {
  49         declare_lint! { pub $name, Allow, $description, report_in_external_macro: true }
  50     };
  51     { pub $name:tt, internal_warn, $description:tt } => {
  52         declare_lint! { pub $name, Warn, $description, report_in_external_macro: true }
  53     };
  54 }
  55
  56 pub mod consts;
  57 #[macro_use]
  58 pub mod utils;
  59
  60 // begin lints modules, do not remove this comment, it’s used in `update_lints`
  61 pub mod approx_const;
  62 pub mod arithmetic;
  63 pub mod assign_ops;
  64 pub mod attrs;
  65 pub mod bit_mask;
  66 pub mod blacklisted_name;
  67 pub mod block_in_if_condition;
  68 pub mod booleans;
  69 pub mod bytecount;
  70 pub mod collapsible_if;
  71 pub mod const_static_lifetime;
  72 pub mod copies;
  73 pub mod cyclomatic_complexity;
  74 pub mod default_trait_access;
  75 pub mod derive;
  76 pub mod doc;
  77 pub mod double_comparison;
  78 pub mod double_parens;
  79 pub mod drop_forget_ref;
  80 pub mod duration_subsec;
  81 pub mod else_if_without_else;
  82 pub mod empty_enum;
  83 pub mod entry;
  84 pub mod enum_clike;
  85 pub mod enum_glob_use;
  86 pub mod enum_variants;
  87 pub mod eq_op;
  88 pub mod erasing_op;
  89 pub mod escape;
  90 pub mod eta_reduction;
  91 pub mod eval_order_dependence;
  92 pub mod excessive_precision;
  93 pub mod explicit_write;
  94 pub mod fallible_impl_from;
  95 pub mod format;
  96 pub mod formatting;
  97 pub mod functions;
  98 pub mod identity_conversion;
  99 pub mod identity_op;
 100 pub mod if_let_redundant_pattern_matching;
 101 pub mod if_not_else;
 102 pub mod indexing_slicing;
 103 pub mod infallible_destructuring_match;
 104 pub mod infinite_iter;
 105 pub mod inherent_impl;
 106 pub mod inline_fn_without_body;
 107 pub mod int_plus_one;
 108 pub mod invalid_ref;
 109 pub mod items_after_statements;
 110 pub mod large_enum_variant;
 111 pub mod len_zero;
 112 pub mod let_if_seq;
 113 pub mod lifetimes;
 114 pub mod literal_representation;
 115 pub mod loops;
 116 pub mod map_clone;
 117 pub mod map_unit_fn;
 118 pub mod matches;
 119 pub mod mem_forget;
 120 pub mod methods;
 121 pub mod minmax;
 122 pub mod misc;
 123 pub mod misc_early;
 124 pub mod missing_doc;
 125 pub mod missing_inline;
 126 pub mod multiple_crate_versions;
 127 pub mod mut_mut;
 128 pub mod mut_reference;
 129 pub mod mutex_atomic;
 130 pub mod needless_bool;
 131 pub mod needless_borrow;
 132 pub mod needless_borrowed_ref;
 133 pub mod needless_continue;
 134 pub mod needless_pass_by_value;
 135 pub mod needless_update;
 136 pub mod neg_cmp_op_on_partial_ord;
 137 pub mod neg_multiply;
 138 pub mod new_without_default;
 139 pub mod no_effect;
 140 pub mod non_copy_const;
 141 pub mod non_expressive_names;
 142 pub mod ok_if_let;
 143 pub mod open_options;
 144 pub mod overflow_check_conditional;
 145 pub mod panic_unimplemented;
 146 pub mod partialeq_ne_impl;
 147 pub mod precedence;
 148 pub mod ptr;
 149 pub mod question_mark;
 150 pub mod ranges;
 151 pub mod redundant_field_names;
 152 pub mod reference;
 153 pub mod regex;
 154 pub mod replace_consts;
 155 pub mod returns;
 156 pub mod serde_api;
 157 pub mod shadow;
 158 pub mod strings;
 159 pub mod suspicious_trait_impl;
 160 pub mod swap;
 161 pub mod temporary_assignment;
 162 pub mod transmute;
 163 pub mod trivially_copy_pass_by_ref;
 164 pub mod types;
 165 pub mod unicode;
 166 pub mod unsafe_removed_from_name;
 167 pub mod unused_io_amount;
 168 pub mod unused_label;
 169 pub mod unwrap;
 170 pub mod use_self;
 171 pub mod vec;
 172 pub mod write;
 173 pub mod zero_div_zero;
 174 // end lints modules, do not remove this comment, it’s used in `update_lints`
 175
 176 mod reexport {
 177     crate use syntax::ast::{Name, NodeId};
 178 }
 179
 180 pub fn register_pre_expansion_lints(session: &rustc::session::Session, store: &mut rustc::lint::LintStore) {
 181     store.register_pre_expansion_pass(Some(session), box write::Pass);
 182     store.register_pre_expansion_pass(Some(session), box redundant_field_names::RedundantFieldNames);
 183 }
 184
 185 #[rustfmt::skip]
 186 pub fn register_plugins(reg: &mut rustc_plugin::Registry<'_>) {
 187     let conf = match utils::conf::file_from_args(reg.args()) {
 188         Ok(file_name) => {
 189             // if the user specified a file, it must exist, otherwise default to `clippy.toml` but
 190             // do not require the file to exist
 191             let file_name = if let Some(file_name) = file_name {
 192                 Some(file_name)
 193             } else {
 194                 match utils::conf::lookup_conf_file() {
 195                     Ok(path) => path,
 196                     Err(error) => {
 197                         reg.sess.struct_err(&format!("error finding Clippy's configuration file: {}", error)).emit();
 198                         None
 199                     }
 200                 }
 201             };
 202
 203             let file_name = file_name.map(|file_name| if file_name.is_relative() {
 204                 reg.sess
 205                     .local_crate_source_file
 206                     .as_ref()
 207                     .and_then(|file| std::path::Path::new(&file).parent().map(std::path::Path::to_path_buf))
 208                     .unwrap_or_default()
 209                     .join(file_name)
 210             } else {
 211                 file_name
 212             });
 213
 214             let (conf, errors) = utils::conf::read(file_name.as_ref().map(|p| p.as_ref()));
 215
 216             // all conf errors are non-fatal, we just use the default conf in case of error
 217             for error in errors {
 218                 reg.sess.struct_err(&format!("error reading Clippy's configuration file `{}`: {}", file_name.as_ref().and_then(|p| p.to_str()).unwrap_or(""), error)).emit();
 219             }
 220
 221             conf
 222         }
 223         Err((err, span)) => {
 224             reg.sess.struct_span_err(span, err)
 225                     .span_note(span, "Clippy will use default configuration")
 226                     .emit();
 227             toml::from_str("").expect("we never error on empty config files")
 228         }
 229     };
 230
 231     let mut store = reg.sess.lint_store.borrow_mut();
 232     store.register_removed(
 233         "should_assert_eq",
 234         "`assert!()` will be more flexible with RFC 2011",
 235     );
 236     store.register_removed(
 237         "extend_from_slice",
 238         "`.extend_from_slice(_)` is a faster way to extend a Vec by a slice",
 239     );
 240     store.register_removed(
 241         "range_step_by_zero",
 242         "`iterator.step_by(0)` panics nowadays",
 243     );
 244     store.register_removed(
 245         "unstable_as_slice",
 246         "`Vec::as_slice` has been stabilized in 1.7",
 247     );
 248     store.register_removed(
 249         "unstable_as_mut_slice",
 250         "`Vec::as_mut_slice` has been stabilized in 1.7",
 251     );
 252     store.register_removed(
 253         "str_to_string",
 254         "using `str::to_string` is common even today and specialization will likely happen soon",
 255     );
 256     store.register_removed(
 257         "string_to_string",
 258         "using `string::to_string` is common even today and specialization will likely happen soon",
 259     );
 260     store.register_removed(
 261         "misaligned_transmute",
 262         "this lint has been split into cast_ptr_alignment and transmute_ptr_to_ptr",
 263     );
 264     // end deprecated lints, do not remove this comment, it’s used in `update_lints`
 265
 266     reg.register_late_lint_pass(box serde_api::Serde);
 267     reg.register_early_lint_pass(box utils::internal_lints::Clippy);
 268     reg.register_late_lint_pass(box utils::internal_lints::LintWithoutLintPass::default());
 269     reg.register_early_lint_pass(box utils::internal_lints::DefaultHashTypes::default());
 270     reg.register_late_lint_pass(box utils::inspector::Pass);
 271     reg.register_late_lint_pass(box utils::author::Pass);
 272     reg.register_late_lint_pass(box types::TypePass);
 273     reg.register_late_lint_pass(box booleans::NonminimalBool);
 274     reg.register_late_lint_pass(box eq_op::EqOp);
 275     reg.register_early_lint_pass(box enum_variants::EnumVariantNames::new(conf.enum_variant_name_threshold));
 276     reg.register_late_lint_pass(box enum_glob_use::EnumGlobUse);
 277     reg.register_late_lint_pass(box enum_clike::UnportableVariant);
 278     reg.register_late_lint_pass(box excessive_precision::ExcessivePrecision);
 279     reg.register_late_lint_pass(box bit_mask::BitMask::new(conf.verbose_bit_mask_threshold));
 280     reg.register_late_lint_pass(box ptr::PointerPass);
 281     reg.register_late_lint_pass(box needless_bool::NeedlessBool);
 282     reg.register_late_lint_pass(box needless_bool::BoolComparison);
 283     reg.register_late_lint_pass(box approx_const::Pass);
 284     reg.register_late_lint_pass(box misc::Pass);
 285     reg.register_early_lint_pass(box precedence::Precedence);
 286     reg.register_early_lint_pass(box needless_continue::NeedlessContinue);
 287     reg.register_late_lint_pass(box eta_reduction::EtaPass);
 288     reg.register_late_lint_pass(box identity_op::IdentityOp);
 289     reg.register_late_lint_pass(box erasing_op::ErasingOp);
 290     reg.register_early_lint_pass(box items_after_statements::ItemsAfterStatements);
 291     reg.register_late_lint_pass(box mut_mut::MutMut);
 292     reg.register_late_lint_pass(box mut_reference::UnnecessaryMutPassed);
 293     reg.register_late_lint_pass(box len_zero::LenZero);
 294     reg.register_late_lint_pass(box attrs::AttrPass);
 295     reg.register_early_lint_pass(box collapsible_if::CollapsibleIf);
 296     reg.register_late_lint_pass(box block_in_if_condition::BlockInIfCondition);
 297     reg.register_late_lint_pass(box unicode::Unicode);
 298     reg.register_late_lint_pass(box strings::StringAdd);
 299     reg.register_early_lint_pass(box returns::ReturnPass);
 300     reg.register_late_lint_pass(box methods::Pass);
 301     reg.register_late_lint_pass(box shadow::Pass);
 302     reg.register_late_lint_pass(box types::LetPass);
 303     reg.register_late_lint_pass(box types::UnitCmp);
 304     reg.register_late_lint_pass(box loops::Pass);
 305     reg.register_late_lint_pass(box lifetimes::LifetimePass);
 306     reg.register_late_lint_pass(box entry::HashMapLint);
 307     reg.register_late_lint_pass(box ranges::Pass);
 308     reg.register_late_lint_pass(box types::CastPass);
 309     reg.register_late_lint_pass(box types::TypeComplexityPass::new(conf.type_complexity_threshold));
 310     reg.register_late_lint_pass(box matches::MatchPass);
 311     reg.register_late_lint_pass(box minmax::MinMaxPass);
 312     reg.register_late_lint_pass(box open_options::NonSensical);
 313     reg.register_late_lint_pass(box zero_div_zero::Pass);
 314     reg.register_late_lint_pass(box mutex_atomic::MutexAtomic);
 315     reg.register_late_lint_pass(box needless_update::Pass);
 316     reg.register_late_lint_pass(box needless_borrow::NeedlessBorrow);
 317     reg.register_late_lint_pass(box needless_borrowed_ref::NeedlessBorrowedRef);
 318     reg.register_late_lint_pass(box no_effect::Pass);
 319     reg.register_late_lint_pass(box map_clone::Pass);
 320     reg.register_late_lint_pass(box temporary_assignment::Pass);
 321     reg.register_late_lint_pass(box transmute::Transmute);
 322     reg.register_late_lint_pass(
 323         box cyclomatic_complexity::CyclomaticComplexity::new(conf.cyclomatic_complexity_threshold)
 324     );
 325     reg.register_late_lint_pass(box escape::Pass{too_large_for_stack: conf.too_large_for_stack});
 326     reg.register_early_lint_pass(box misc_early::MiscEarly);
 327     reg.register_late_lint_pass(box panic_unimplemented::Pass);
 328     reg.register_late_lint_pass(box strings::StringLitAsBytes);
 329     reg.register_late_lint_pass(box derive::Derive);
 330     reg.register_late_lint_pass(box types::CharLitAsU8);
 331     reg.register_late_lint_pass(box vec::Pass);
 332     reg.register_early_lint_pass(box non_expressive_names::NonExpressiveNames {
 333         single_char_binding_names_threshold: conf.single_char_binding_names_threshold,
 334     });
 335     reg.register_late_lint_pass(box drop_forget_ref::Pass);
 336     reg.register_late_lint_pass(box empty_enum::EmptyEnum);
 337     reg.register_late_lint_pass(box types::AbsurdExtremeComparisons);
 338     reg.register_late_lint_pass(box types::InvalidUpcastComparisons);
 339     reg.register_late_lint_pass(box regex::Pass::default());
 340     reg.register_late_lint_pass(box copies::CopyAndPaste);
 341     reg.register_late_lint_pass(box format::Pass);
 342     reg.register_early_lint_pass(box formatting::Formatting);
 343     reg.register_late_lint_pass(box swap::Swap);
 344     reg.register_early_lint_pass(box if_not_else::IfNotElse);
 345     reg.register_early_lint_pass(box else_if_without_else::ElseIfWithoutElse);
 346     reg.register_early_lint_pass(box int_plus_one::IntPlusOne);
 347     reg.register_late_lint_pass(box overflow_check_conditional::OverflowCheckConditional);
 348     reg.register_late_lint_pass(box unused_label::UnusedLabel);
 349     reg.register_late_lint_pass(box new_without_default::NewWithoutDefault);
 350     reg.register_late_lint_pass(box blacklisted_name::BlackListedName::new(conf.blacklisted_names));
 351     reg.register_late_lint_pass(box functions::Functions::new(conf.too_many_arguments_threshold));
 352     reg.register_early_lint_pass(box doc::Doc::new(conf.doc_valid_idents));
 353     reg.register_late_lint_pass(box neg_multiply::NegMultiply);
 354     reg.register_early_lint_pass(box unsafe_removed_from_name::UnsafeNameRemoval);
 355     reg.register_late_lint_pass(box mem_forget::MemForget);
 356     reg.register_late_lint_pass(box arithmetic::Arithmetic::default());
 357     reg.register_late_lint_pass(box assign_ops::AssignOps);
 358     reg.register_late_lint_pass(box let_if_seq::LetIfSeq);
 359     reg.register_late_lint_pass(box eval_order_dependence::EvalOrderDependence);
 360     reg.register_late_lint_pass(box missing_doc::MissingDoc::new());
 361     reg.register_late_lint_pass(box missing_inline::MissingInline);
 362     reg.register_late_lint_pass(box ok_if_let::Pass);
 363     reg.register_late_lint_pass(box if_let_redundant_pattern_matching::Pass);
 364     reg.register_late_lint_pass(box partialeq_ne_impl::Pass);
 365     reg.register_early_lint_pass(box reference::Pass);
 366     reg.register_early_lint_pass(box reference::DerefPass);
 367     reg.register_early_lint_pass(box double_parens::DoubleParens);
 368     reg.register_late_lint_pass(box unused_io_amount::UnusedIoAmount);
 369     reg.register_late_lint_pass(box large_enum_variant::LargeEnumVariant::new(conf.enum_variant_size_threshold));
 370     reg.register_late_lint_pass(box explicit_write::Pass);
 371     reg.register_late_lint_pass(box needless_pass_by_value::NeedlessPassByValue);
 372
 373     let target = &reg.sess.target;
 374     reg.register_late_lint_pass(box trivially_copy_pass_by_ref::TriviallyCopyPassByRef::new(
 375             conf.trivial_copy_size_limit,
 376             target,
 377     ));
 378     reg.register_early_lint_pass(box literal_representation::LiteralDigitGrouping);
 379     reg.register_early_lint_pass(box literal_representation::LiteralRepresentation::new(
 380             conf.literal_representation_threshold
 381     ));
 382     reg.register_late_lint_pass(box use_self::UseSelf);
 383     reg.register_late_lint_pass(box bytecount::ByteCount);
 384     reg.register_late_lint_pass(box infinite_iter::Pass);
 385     reg.register_late_lint_pass(box inline_fn_without_body::Pass);
 386     reg.register_late_lint_pass(box invalid_ref::InvalidRef);
 387     reg.register_late_lint_pass(box identity_conversion::IdentityConversion::default());
 388     reg.register_late_lint_pass(box types::ImplicitHasher);
 389     reg.register_early_lint_pass(box const_static_lifetime::StaticConst);
 390     reg.register_late_lint_pass(box fallible_impl_from::FallibleImplFrom);
 391     reg.register_late_lint_pass(box replace_consts::ReplaceConsts);
 392     reg.register_late_lint_pass(box types::UnitArg);
 393     reg.register_late_lint_pass(box double_comparison::DoubleComparisonPass);
 394     reg.register_late_lint_pass(box question_mark::QuestionMarkPass);
 395     reg.register_late_lint_pass(box suspicious_trait_impl::SuspiciousImpl);
 396     reg.register_early_lint_pass(box multiple_crate_versions::Pass);
 397     reg.register_late_lint_pass(box map_unit_fn::Pass);
 398     reg.register_late_lint_pass(box infallible_destructuring_match::Pass);
 399     reg.register_late_lint_pass(box inherent_impl::Pass::default());
 400     reg.register_late_lint_pass(box neg_cmp_op_on_partial_ord::NoNegCompOpForPartialOrd);
 401     reg.register_late_lint_pass(box unwrap::Pass);
 402     reg.register_late_lint_pass(box duration_subsec::DurationSubsec);
 403     reg.register_late_lint_pass(box default_trait_access::DefaultTraitAccess);
 404     reg.register_late_lint_pass(box indexing_slicing::IndexingSlicing);
 405     reg.register_late_lint_pass(box non_copy_const::NonCopyConst);
 406
 407     reg.register_lint_group("clippy_restriction", vec![
 408         arithmetic::FLOAT_ARITHMETIC,
 409         arithmetic::INTEGER_ARITHMETIC,
 410         assign_ops::ASSIGN_OPS,
 411         else_if_without_else::ELSE_IF_WITHOUT_ELSE,
 412         indexing_slicing::INDEXING_SLICING,
 413         inherent_impl::MULTIPLE_INHERENT_IMPL,
 414         literal_representation::DECIMAL_LITERAL_REPRESENTATION,
 415         mem_forget::MEM_FORGET,
 416         methods::CLONE_ON_REF_PTR,
 417         methods::OPTION_UNWRAP_USED,
 418         methods::RESULT_UNWRAP_USED,
 419         methods::WRONG_PUB_SELF_CONVENTION,
 420         misc::FLOAT_CMP_CONST,
 421         missing_doc::MISSING_DOCS_IN_PRIVATE_ITEMS,
 422         missing_inline::MISSING_INLINE_IN_PUBLIC_ITEMS,
 423         panic_unimplemented::UNIMPLEMENTED,
 424         shadow::SHADOW_REUSE,
 425         shadow::SHADOW_SAME,
 426         shadow::SHADOW_UNRELATED,
 427         strings::STRING_ADD,
 428         write::PRINT_STDOUT,
 429         write::USE_DEBUG,
 430     ]);
 431
 432     reg.register_lint_group("clippy_pedantic", vec![
 433         attrs::INLINE_ALWAYS,
 434         copies::MATCH_SAME_ARMS,
 435         default_trait_access::DEFAULT_TRAIT_ACCESS,
 436         derive::EXPL_IMPL_CLONE_ON_COPY,
 437         doc::DOC_MARKDOWN,
 438         empty_enum::EMPTY_ENUM,
 439         enum_glob_use::ENUM_GLOB_USE,
 440         enum_variants::PUB_ENUM_VARIANT_NAMES,
 441         enum_variants::STUTTER,
 442         if_not_else::IF_NOT_ELSE,
 443         infinite_iter::MAYBE_INFINITE_ITER,
 444         items_after_statements::ITEMS_AFTER_STATEMENTS,
 445         matches::SINGLE_MATCH_ELSE,
 446         methods::FILTER_MAP,
 447         methods::OPTION_MAP_UNWRAP_OR,
 448         methods::OPTION_MAP_UNWRAP_OR_ELSE,
 449         methods::RESULT_MAP_UNWRAP_OR_ELSE,
 450         misc::USED_UNDERSCORE_BINDING,
 451         misc_early::UNSEPARATED_LITERAL_SUFFIX,
 452         mut_mut::MUT_MUT,
 453         needless_continue::NEEDLESS_CONTINUE,
 454         non_expressive_names::SIMILAR_NAMES,
 455         replace_consts::REPLACE_CONSTS,
 456         strings::STRING_ADD_ASSIGN,
 457         types::CAST_POSSIBLE_TRUNCATION,
 458         types::CAST_POSSIBLE_WRAP,
 459         types::CAST_PRECISION_LOSS,
 460         types::CAST_SIGN_LOSS,
 461         types::INVALID_UPCAST_COMPARISONS,
 462         types::LINKEDLIST,
 463         unicode::NON_ASCII_LITERAL,
 464         unicode::UNICODE_NOT_NFC,
 465         use_self::USE_SELF,
 466     ]);
 467
 468     reg.register_lint_group("clippy_internal", vec![
 469         utils::internal_lints::CLIPPY_LINTS_INTERNAL,
 470         utils::internal_lints::LINT_WITHOUT_LINT_PASS,
 471         utils::internal_lints::DEFAULT_HASH_TYPES,
 472     ]);
 473
 474     reg.register_lint_group("clippy", vec![
 475         approx_const::APPROX_CONSTANT,
 476         assign_ops::ASSIGN_OP_PATTERN,
 477         assign_ops::MISREFACTORED_ASSIGN_OP,
 478         attrs::DEPRECATED_SEMVER,
 479         attrs::USELESS_ATTRIBUTE,
 480         bit_mask::BAD_BIT_MASK,
 481         bit_mask::INEFFECTIVE_BIT_MASK,
 482         bit_mask::VERBOSE_BIT_MASK,
 483         blacklisted_name::BLACKLISTED_NAME,
 484         block_in_if_condition::BLOCK_IN_IF_CONDITION_EXPR,
 485         block_in_if_condition::BLOCK_IN_IF_CONDITION_STMT,
 486         booleans::LOGIC_BUG,
 487         booleans::NONMINIMAL_BOOL,
 488         bytecount::NAIVE_BYTECOUNT,
 489         collapsible_if::COLLAPSIBLE_IF,
 490         const_static_lifetime::CONST_STATIC_LIFETIME,
 491         copies::IF_SAME_THEN_ELSE,
 492         copies::IFS_SAME_COND,
 493         cyclomatic_complexity::CYCLOMATIC_COMPLEXITY,
 494         derive::DERIVE_HASH_XOR_EQ,
 495         double_comparison::DOUBLE_COMPARISONS,
 496         double_parens::DOUBLE_PARENS,
 497         drop_forget_ref::DROP_COPY,
 498         drop_forget_ref::DROP_REF,
 499         drop_forget_ref::FORGET_COPY,
 500         drop_forget_ref::FORGET_REF,
 501         duration_subsec::DURATION_SUBSEC,
 502         entry::MAP_ENTRY,
 503         enum_clike::ENUM_CLIKE_UNPORTABLE_VARIANT,
 504         enum_variants::ENUM_VARIANT_NAMES,
 505         enum_variants::MODULE_INCEPTION,
 506         eq_op::EQ_OP,
 507         eq_op::OP_REF,
 508         erasing_op::ERASING_OP,
 509         escape::BOXED_LOCAL,
 510         eta_reduction::REDUNDANT_CLOSURE,
 511         eval_order_dependence::DIVERGING_SUB_EXPRESSION,
 512         eval_order_dependence::EVAL_ORDER_DEPENDENCE,
 513         excessive_precision::EXCESSIVE_PRECISION,
 514         explicit_write::EXPLICIT_WRITE,
 515         format::USELESS_FORMAT,
 516         formatting::POSSIBLE_MISSING_COMMA,
 517         formatting::SUSPICIOUS_ASSIGNMENT_FORMATTING,
 518         formatting::SUSPICIOUS_ELSE_FORMATTING,
 519         functions::NOT_UNSAFE_PTR_ARG_DEREF,
 520         functions::TOO_MANY_ARGUMENTS,
 521         identity_conversion::IDENTITY_CONVERSION,
 522         identity_op::IDENTITY_OP,
 523         if_let_redundant_pattern_matching::IF_LET_REDUNDANT_PATTERN_MATCHING,
 524         indexing_slicing::OUT_OF_BOUNDS_INDEXING,
 525         infallible_destructuring_match::INFALLIBLE_DESTRUCTURING_MATCH,
 526         infinite_iter::INFINITE_ITER,
 527         inline_fn_without_body::INLINE_FN_WITHOUT_BODY,
 528         int_plus_one::INT_PLUS_ONE,
 529         invalid_ref::INVALID_REF,
 530         large_enum_variant::LARGE_ENUM_VARIANT,
 531         len_zero::LEN_WITHOUT_IS_EMPTY,
 532         len_zero::LEN_ZERO,
 533         let_if_seq::USELESS_LET_IF_SEQ,
 534         lifetimes::EXTRA_UNUSED_LIFETIMES,
 535         lifetimes::NEEDLESS_LIFETIMES,
 536         literal_representation::INCONSISTENT_DIGIT_GROUPING,
 537         literal_representation::LARGE_DIGIT_GROUPS,
 538         literal_representation::UNREADABLE_LITERAL,
 539         loops::EMPTY_LOOP,
 540         loops::EXPLICIT_COUNTER_LOOP,
 541         loops::EXPLICIT_INTO_ITER_LOOP,
 542         loops::EXPLICIT_ITER_LOOP,
 543         loops::FOR_KV_MAP,
 544         loops::FOR_LOOP_OVER_OPTION,
 545         loops::FOR_LOOP_OVER_RESULT,
 546         loops::ITER_NEXT_LOOP,
 547         loops::MANUAL_MEMCPY,
 548         loops::MUT_RANGE_BOUND,
 549         loops::NEEDLESS_RANGE_LOOP,
 550         loops::NEVER_LOOP,
 551         loops::REVERSE_RANGE_LOOP,
 552         loops::UNUSED_COLLECT,
 553         loops::WHILE_IMMUTABLE_CONDITION,
 554         loops::WHILE_LET_LOOP,
 555         loops::WHILE_LET_ON_ITERATOR,
 556         map_clone::MAP_CLONE,
 557         map_unit_fn::OPTION_MAP_UNIT_FN,
 558         map_unit_fn::RESULT_MAP_UNIT_FN,
 559         matches::MATCH_AS_REF,
 560         matches::MATCH_BOOL,
 561         matches::MATCH_OVERLAPPING_ARM,
 562         matches::MATCH_REF_PATS,
 563         matches::MATCH_WILD_ERR_ARM,
 564         matches::SINGLE_MATCH,
 565         methods::CHARS_LAST_CMP,
 566         methods::CHARS_NEXT_CMP,
 567         methods::CLONE_DOUBLE_REF,
 568         methods::CLONE_ON_COPY,
 569         methods::EXPECT_FUN_CALL,
 570         methods::FILTER_NEXT,
 571         methods::GET_UNWRAP,
 572         methods::ITER_CLONED_COLLECT,
 573         methods::ITER_NTH,
 574         methods::ITER_SKIP_NEXT,
 575         methods::NEW_RET_NO_SELF,
 576         methods::OK_EXPECT,
 577         methods::OPTION_MAP_OR_NONE,
 578         methods::OR_FUN_CALL,
 579         methods::SEARCH_IS_SOME,
 580         methods::SHOULD_IMPLEMENT_TRAIT,
 581         methods::SINGLE_CHAR_PATTERN,
 582         methods::STRING_EXTEND_CHARS,
 583         methods::TEMPORARY_CSTRING_AS_PTR,
 584         methods::UNNECESSARY_FOLD,
 585         methods::USELESS_ASREF,
 586         methods::WRONG_SELF_CONVENTION,
 587         minmax::MIN_MAX,
 588         misc::CMP_NAN,
 589         misc::CMP_OWNED,
 590         misc::FLOAT_CMP,
 591         misc::MODULO_ONE,
 592         misc::REDUNDANT_PATTERN,
 593         misc::SHORT_CIRCUIT_STATEMENT,
 594         misc::TOPLEVEL_REF_ARG,
 595         misc::ZERO_PTR,
 596         misc_early::BUILTIN_TYPE_SHADOW,
 597         misc_early::DOUBLE_NEG,
 598         misc_early::DUPLICATE_UNDERSCORE_ARGUMENT,
 599         misc_early::MIXED_CASE_HEX_LITERALS,
 600         misc_early::REDUNDANT_CLOSURE_CALL,
 601         misc_early::UNNEEDED_FIELD_PATTERN,
 602         misc_early::ZERO_PREFIXED_LITERAL,
 603         mut_reference::UNNECESSARY_MUT_PASSED,
 604         mutex_atomic::MUTEX_ATOMIC,
 605         needless_bool::BOOL_COMPARISON,
 606         needless_bool::NEEDLESS_BOOL,
 607         needless_borrowed_ref::NEEDLESS_BORROWED_REFERENCE,
 608         needless_pass_by_value::NEEDLESS_PASS_BY_VALUE,
 609         needless_update::NEEDLESS_UPDATE,
 610         neg_cmp_op_on_partial_ord::NEG_CMP_OP_ON_PARTIAL_ORD,
 611         neg_multiply::NEG_MULTIPLY,
 612         new_without_default::NEW_WITHOUT_DEFAULT,
 613         new_without_default::NEW_WITHOUT_DEFAULT_DERIVE,
 614         no_effect::NO_EFFECT,
 615         no_effect::UNNECESSARY_OPERATION,
 616         non_copy_const::BORROW_INTERIOR_MUTABLE_CONST,
 617         non_copy_const::DECLARE_INTERIOR_MUTABLE_CONST,
 618         non_expressive_names::JUST_UNDERSCORES_AND_DIGITS,
 619         non_expressive_names::MANY_SINGLE_CHAR_NAMES,
 620         ok_if_let::IF_LET_SOME_RESULT,
 621         open_options::NONSENSICAL_OPEN_OPTIONS,
 622         overflow_check_conditional::OVERFLOW_CHECK_CONDITIONAL,
 623         panic_unimplemented::PANIC_PARAMS,
 624         partialeq_ne_impl::PARTIALEQ_NE_IMPL,
 625         precedence::PRECEDENCE,
 626         ptr::CMP_NULL,
 627         ptr::MUT_FROM_REF,
 628         ptr::PTR_ARG,
 629         question_mark::QUESTION_MARK,
 630         ranges::ITERATOR_STEP_BY_ZERO,
 631         ranges::RANGE_MINUS_ONE,
 632         ranges::RANGE_ZIP_WITH_LEN,
 633         redundant_field_names::REDUNDANT_FIELD_NAMES,
 634         reference::DEREF_ADDROF,
 635         reference::REF_IN_DEREF,
 636         regex::INVALID_REGEX,
 637         regex::REGEX_MACRO,
 638         regex::TRIVIAL_REGEX,
 639         returns::LET_AND_RETURN,
 640         returns::NEEDLESS_RETURN,
 641         serde_api::SERDE_API_MISUSE,
 642         strings::STRING_LIT_AS_BYTES,
 643         suspicious_trait_impl::SUSPICIOUS_ARITHMETIC_IMPL,
 644         suspicious_trait_impl::SUSPICIOUS_OP_ASSIGN_IMPL,
 645         swap::ALMOST_SWAPPED,
 646         swap::MANUAL_SWAP,
 647         temporary_assignment::TEMPORARY_ASSIGNMENT,
 648         transmute::CROSSPOINTER_TRANSMUTE,
 649         transmute::TRANSMUTE_BYTES_TO_STR,
 650         transmute::TRANSMUTE_INT_TO_BOOL,
 651         transmute::TRANSMUTE_INT_TO_CHAR,
 652         transmute::TRANSMUTE_INT_TO_FLOAT,
 653         transmute::TRANSMUTE_PTR_TO_PTR,
 654         transmute::TRANSMUTE_PTR_TO_REF,
 655         transmute::USELESS_TRANSMUTE,
 656         transmute::WRONG_TRANSMUTE,
 657         trivially_copy_pass_by_ref::TRIVIALLY_COPY_PASS_BY_REF,
 658         types::ABSURD_EXTREME_COMPARISONS,
 659         types::BORROWED_BOX,
 660         types::BOX_VEC,
 661         types::CAST_LOSSLESS,
 662         types::CAST_PTR_ALIGNMENT,
 663         types::CHAR_LIT_AS_U8,
 664         types::FN_TO_NUMERIC_CAST,
 665         types::FN_TO_NUMERIC_CAST_WITH_TRUNCATION,
 666         types::IMPLICIT_HASHER,
 667         types::LET_UNIT_VALUE,
 668         types::OPTION_OPTION,
 669         types::TYPE_COMPLEXITY,
 670         types::UNIT_ARG,
 671         types::UNIT_CMP,
 672         types::UNNECESSARY_CAST,
 673         unicode::ZERO_WIDTH_SPACE,
 674         unsafe_removed_from_name::UNSAFE_REMOVED_FROM_NAME,
 675         unused_io_amount::UNUSED_IO_AMOUNT,
 676         unused_label::UNUSED_LABEL,
 677         vec::USELESS_VEC,
 678         write::PRINT_LITERAL,
 679         write::PRINT_WITH_NEWLINE,
 680         write::PRINTLN_EMPTY_STRING,
 681         write::WRITE_LITERAL,
 682         write::WRITE_WITH_NEWLINE,
 683         write::WRITELN_EMPTY_STRING,
 684         zero_div_zero::ZERO_DIVIDED_BY_ZERO,
 685     ]);
 686
 687     reg.register_lint_group("clippy_style", vec![
 688         assign_ops::ASSIGN_OP_PATTERN,
 689         bit_mask::VERBOSE_BIT_MASK,
 690         blacklisted_name::BLACKLISTED_NAME,
 691         block_in_if_condition::BLOCK_IN_IF_CONDITION_EXPR,
 692         block_in_if_condition::BLOCK_IN_IF_CONDITION_STMT,
 693         collapsible_if::COLLAPSIBLE_IF,
 694         const_static_lifetime::CONST_STATIC_LIFETIME,
 695         enum_variants::ENUM_VARIANT_NAMES,
 696         enum_variants::MODULE_INCEPTION,
 697         eq_op::OP_REF,
 698         eta_reduction::REDUNDANT_CLOSURE,
 699         excessive_precision::EXCESSIVE_PRECISION,
 700         formatting::SUSPICIOUS_ASSIGNMENT_FORMATTING,
 701         formatting::SUSPICIOUS_ELSE_FORMATTING,
 702         if_let_redundant_pattern_matching::IF_LET_REDUNDANT_PATTERN_MATCHING,
 703         infallible_destructuring_match::INFALLIBLE_DESTRUCTURING_MATCH,
 704         len_zero::LEN_WITHOUT_IS_EMPTY,
 705         len_zero::LEN_ZERO,
 706         let_if_seq::USELESS_LET_IF_SEQ,
 707         literal_representation::INCONSISTENT_DIGIT_GROUPING,
 708         literal_representation::LARGE_DIGIT_GROUPS,
 709         literal_representation::UNREADABLE_LITERAL,
 710         loops::EMPTY_LOOP,
 711         loops::EXPLICIT_INTO_ITER_LOOP,
 712         loops::EXPLICIT_ITER_LOOP,
 713         loops::FOR_KV_MAP,
 714         loops::NEEDLESS_RANGE_LOOP,
 715         loops::WHILE_LET_ON_ITERATOR,
 716         map_clone::MAP_CLONE,
 717         matches::MATCH_BOOL,
 718         matches::MATCH_OVERLAPPING_ARM,
 719         matches::MATCH_REF_PATS,
 720         matches::MATCH_WILD_ERR_ARM,
 721         matches::SINGLE_MATCH,
 722         methods::CHARS_LAST_CMP,
 723         methods::GET_UNWRAP,
 724         methods::ITER_CLONED_COLLECT,
 725         methods::ITER_SKIP_NEXT,
 726         methods::NEW_RET_NO_SELF,
 727         methods::OK_EXPECT,
 728         methods::OPTION_MAP_OR_NONE,
 729         methods::SHOULD_IMPLEMENT_TRAIT,
 730         methods::STRING_EXTEND_CHARS,
 731         methods::UNNECESSARY_FOLD,
 732         methods::WRONG_SELF_CONVENTION,
 733         misc::REDUNDANT_PATTERN,
 734         misc::TOPLEVEL_REF_ARG,
 735         misc::ZERO_PTR,
 736         misc_early::BUILTIN_TYPE_SHADOW,
 737         misc_early::DOUBLE_NEG,
 738         misc_early::DUPLICATE_UNDERSCORE_ARGUMENT,
 739         misc_early::MIXED_CASE_HEX_LITERALS,
 740         misc_early::UNNEEDED_FIELD_PATTERN,
 741         mut_reference::UNNECESSARY_MUT_PASSED,
 742         needless_pass_by_value::NEEDLESS_PASS_BY_VALUE,
 743         neg_multiply::NEG_MULTIPLY,
 744         new_without_default::NEW_WITHOUT_DEFAULT,
 745         new_without_default::NEW_WITHOUT_DEFAULT_DERIVE,
 746         non_expressive_names::JUST_UNDERSCORES_AND_DIGITS,
 747         non_expressive_names::MANY_SINGLE_CHAR_NAMES,
 748         ok_if_let::IF_LET_SOME_RESULT,
 749         panic_unimplemented::PANIC_PARAMS,
 750         ptr::CMP_NULL,
 751         ptr::PTR_ARG,
 752         question_mark::QUESTION_MARK,
 753         ranges::RANGE_MINUS_ONE,
 754         redundant_field_names::REDUNDANT_FIELD_NAMES,
 755         regex::REGEX_MACRO,
 756         regex::TRIVIAL_REGEX,
 757         returns::LET_AND_RETURN,
 758         returns::NEEDLESS_RETURN,
 759         strings::STRING_LIT_AS_BYTES,
 760         types::FN_TO_NUMERIC_CAST,
 761         types::IMPLICIT_HASHER,
 762         types::LET_UNIT_VALUE,
 763         unsafe_removed_from_name::UNSAFE_REMOVED_FROM_NAME,
 764         write::PRINT_LITERAL,
 765         write::PRINT_WITH_NEWLINE,
 766         write::PRINTLN_EMPTY_STRING,
 767         write::WRITE_LITERAL,
 768         write::WRITE_WITH_NEWLINE,
 769         write::WRITELN_EMPTY_STRING,
 770     ]);
 771
 772     reg.register_lint_group("clippy_complexity", vec![
 773         assign_ops::MISREFACTORED_ASSIGN_OP,
 774         booleans::NONMINIMAL_BOOL,
 775         cyclomatic_complexity::CYCLOMATIC_COMPLEXITY,
 776         double_comparison::DOUBLE_COMPARISONS,
 777         double_parens::DOUBLE_PARENS,
 778         duration_subsec::DURATION_SUBSEC,
 779         eval_order_dependence::DIVERGING_SUB_EXPRESSION,
 780         eval_order_dependence::EVAL_ORDER_DEPENDENCE,
 781         explicit_write::EXPLICIT_WRITE,
 782         format::USELESS_FORMAT,
 783         functions::TOO_MANY_ARGUMENTS,
 784         identity_conversion::IDENTITY_CONVERSION,
 785         identity_op::IDENTITY_OP,
 786         int_plus_one::INT_PLUS_ONE,
 787         lifetimes::EXTRA_UNUSED_LIFETIMES,
 788         lifetimes::NEEDLESS_LIFETIMES,
 789         loops::EXPLICIT_COUNTER_LOOP,
 790         loops::MUT_RANGE_BOUND,
 791         loops::WHILE_LET_LOOP,
 792         map_unit_fn::OPTION_MAP_UNIT_FN,
 793         map_unit_fn::RESULT_MAP_UNIT_FN,
 794         matches::MATCH_AS_REF,
 795         methods::CHARS_NEXT_CMP,
 796         methods::CLONE_ON_COPY,
 797         methods::FILTER_NEXT,
 798         methods::SEARCH_IS_SOME,
 799         methods::USELESS_ASREF,
 800         misc::SHORT_CIRCUIT_STATEMENT,
 801         misc_early::REDUNDANT_CLOSURE_CALL,
 802         misc_early::ZERO_PREFIXED_LITERAL,
 803         needless_bool::BOOL_COMPARISON,
 804         needless_bool::NEEDLESS_BOOL,
 805         needless_borrowed_ref::NEEDLESS_BORROWED_REFERENCE,
 806         needless_update::NEEDLESS_UPDATE,
 807         neg_cmp_op_on_partial_ord::NEG_CMP_OP_ON_PARTIAL_ORD,
 808         no_effect::NO_EFFECT,
 809         no_effect::UNNECESSARY_OPERATION,
 810         overflow_check_conditional::OVERFLOW_CHECK_CONDITIONAL,
 811         partialeq_ne_impl::PARTIALEQ_NE_IMPL,
 812         precedence::PRECEDENCE,
 813         ranges::RANGE_ZIP_WITH_LEN,
 814         reference::DEREF_ADDROF,
 815         reference::REF_IN_DEREF,
 816         swap::MANUAL_SWAP,
 817         temporary_assignment::TEMPORARY_ASSIGNMENT,
 818         transmute::CROSSPOINTER_TRANSMUTE,
 819         transmute::TRANSMUTE_BYTES_TO_STR,
 820         transmute::TRANSMUTE_INT_TO_BOOL,
 821         transmute::TRANSMUTE_INT_TO_CHAR,
 822         transmute::TRANSMUTE_INT_TO_FLOAT,
 823         transmute::TRANSMUTE_PTR_TO_PTR,
 824         transmute::TRANSMUTE_PTR_TO_REF,
 825         transmute::USELESS_TRANSMUTE,
 826         types::BORROWED_BOX,
 827         types::CAST_LOSSLESS,
 828         types::CHAR_LIT_AS_U8,
 829         types::OPTION_OPTION,
 830         types::TYPE_COMPLEXITY,
 831         types::UNIT_ARG,
 832         types::UNNECESSARY_CAST,
 833         unused_label::UNUSED_LABEL,
 834         zero_div_zero::ZERO_DIVIDED_BY_ZERO,
 835     ]);
 836
 837     reg.register_lint_group("clippy_correctness", vec![
 838         approx_const::APPROX_CONSTANT,
 839         attrs::DEPRECATED_SEMVER,
 840         attrs::USELESS_ATTRIBUTE,
 841         bit_mask::BAD_BIT_MASK,
 842         bit_mask::INEFFECTIVE_BIT_MASK,
 843         booleans::LOGIC_BUG,
 844         copies::IF_SAME_THEN_ELSE,
 845         copies::IFS_SAME_COND,
 846         derive::DERIVE_HASH_XOR_EQ,
 847         drop_forget_ref::DROP_COPY,
 848         drop_forget_ref::DROP_REF,
 849         drop_forget_ref::FORGET_COPY,
 850         drop_forget_ref::FORGET_REF,
 851         enum_clike::ENUM_CLIKE_UNPORTABLE_VARIANT,
 852         eq_op::EQ_OP,
 853         erasing_op::ERASING_OP,
 854         formatting::POSSIBLE_MISSING_COMMA,
 855         functions::NOT_UNSAFE_PTR_ARG_DEREF,
 856         indexing_slicing::OUT_OF_BOUNDS_INDEXING,
 857         infinite_iter::INFINITE_ITER,
 858         inline_fn_without_body::INLINE_FN_WITHOUT_BODY,
 859         invalid_ref::INVALID_REF,
 860         loops::FOR_LOOP_OVER_OPTION,
 861         loops::FOR_LOOP_OVER_RESULT,
 862         loops::ITER_NEXT_LOOP,
 863         loops::NEVER_LOOP,
 864         loops::REVERSE_RANGE_LOOP,
 865         loops::WHILE_IMMUTABLE_CONDITION,
 866         methods::CLONE_DOUBLE_REF,
 867         methods::TEMPORARY_CSTRING_AS_PTR,
 868         minmax::MIN_MAX,
 869         misc::CMP_NAN,
 870         misc::FLOAT_CMP,
 871         misc::MODULO_ONE,
 872         non_copy_const::BORROW_INTERIOR_MUTABLE_CONST,
 873         non_copy_const::DECLARE_INTERIOR_MUTABLE_CONST,
 874         open_options::NONSENSICAL_OPEN_OPTIONS,
 875         ptr::MUT_FROM_REF,
 876         ranges::ITERATOR_STEP_BY_ZERO,
 877         regex::INVALID_REGEX,
 878         serde_api::SERDE_API_MISUSE,
 879         suspicious_trait_impl::SUSPICIOUS_ARITHMETIC_IMPL,
 880         suspicious_trait_impl::SUSPICIOUS_OP_ASSIGN_IMPL,
 881         swap::ALMOST_SWAPPED,
 882         transmute::WRONG_TRANSMUTE,
 883         types::ABSURD_EXTREME_COMPARISONS,
 884         types::CAST_PTR_ALIGNMENT,
 885         types::FN_TO_NUMERIC_CAST_WITH_TRUNCATION,
 886         types::UNIT_CMP,
 887         unicode::ZERO_WIDTH_SPACE,
 888         unused_io_amount::UNUSED_IO_AMOUNT,
 889     ]);
 890
 891     reg.register_lint_group("clippy_perf", vec![
 892         bytecount::NAIVE_BYTECOUNT,
 893         entry::MAP_ENTRY,
 894         escape::BOXED_LOCAL,
 895         large_enum_variant::LARGE_ENUM_VARIANT,
 896         loops::MANUAL_MEMCPY,
 897         loops::UNUSED_COLLECT,
 898         methods::EXPECT_FUN_CALL,
 899         methods::ITER_NTH,
 900         methods::OR_FUN_CALL,
 901         methods::SINGLE_CHAR_PATTERN,
 902         misc::CMP_OWNED,
 903         mutex_atomic::MUTEX_ATOMIC,
 904         trivially_copy_pass_by_ref::TRIVIALLY_COPY_PASS_BY_REF,
 905         types::BOX_VEC,
 906         vec::USELESS_VEC,
 907     ]);
 908
 909     reg.register_lint_group("clippy_cargo", vec![
 910         multiple_crate_versions::MULTIPLE_CRATE_VERSIONS,
 911     ]);
 912
 913     reg.register_lint_group("clippy_nursery", vec![
 914         attrs::EMPTY_LINE_AFTER_OUTER_ATTR,
 915         fallible_impl_from::FALLIBLE_IMPL_FROM,
 916         mutex_atomic::MUTEX_INTEGER,
 917         needless_borrow::NEEDLESS_BORROW,
 918         ranges::RANGE_PLUS_ONE,
 919         unwrap::PANICKING_UNWRAP,
 920         unwrap::UNNECESSARY_UNWRAP,
 921     ]);
 922 }
 923
 924 // only exists to let the dogfood integration test works.
 925 // Don't run clippy as an executable directly
 926 #[allow(dead_code, print_stdout)]
 927 fn main() {
 928     panic!("Please use the cargo-clippy executable");
 929 }