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(rust_2018_preview)]
  15 #![warn(rust_2018_idioms)]
  16
  17 #[macro_use]
  18 extern crate rustc;
  19
  20 use toml;
  21 use rustc_plugin;
  22
  23 #[macro_use]
  24 extern crate matches as matches_macro;
  25
  26 #[macro_use]
  27 extern crate serde_derive;
  28
  29 #[macro_use]
  30 extern crate lazy_static;
  31
  32 #[macro_use]
  33 extern crate if_chain;
  34
  35 macro_rules! declare_clippy_lint {
  36     { pub $name:tt, style, $description:tt } => {
  37         declare_lint! { pub $name, Warn, $description }
  38     };
  39     { pub $name:tt, correctness, $description:tt } => {
  40         declare_lint! { pub $name, Deny, $description }
  41     };
  42     { pub $name:tt, complexity, $description:tt } => {
  43         declare_lint! { pub $name, Warn, $description }
  44     };
  45     { pub $name:tt, perf, $description:tt } => {
  46         declare_lint! { pub $name, Warn, $description }
  47     };
  48     { pub $name:tt, pedantic, $description:tt } => {
  49         declare_lint! { pub $name, Allow, $description }
  50     };
  51     { pub $name:tt, restriction, $description:tt } => {
  52         declare_lint! { pub $name, Allow, $description }
  53     };
  54     { pub $name:tt, cargo, $description:tt } => {
  55         declare_lint! { pub $name, Allow, $description }
  56     };
  57     { pub $name:tt, nursery, $description:tt } => {
  58         declare_lint! { pub $name, Allow, $description }
  59     };
  60     { pub $name:tt, internal, $description:tt } => {
  61         declare_lint! { pub $name, Allow, $description }
  62     };
  63     { pub $name:tt, internal_warn, $description:tt } => {
  64         declare_lint! { pub $name, Warn, $description }
  65     };
  66 }
  67
  68 pub mod consts;
  69 #[macro_use]
  70 pub mod utils;
  71
  72 // begin lints modules, do not remove this comment, it’s used in `update_lints`
  73 pub mod approx_const;
  74 pub mod arithmetic;
  75 pub mod assign_ops;
  76 pub mod attrs;
  77 pub mod bit_mask;
  78 pub mod blacklisted_name;
  79 pub mod block_in_if_condition;
  80 pub mod booleans;
  81 pub mod bytecount;
  82 pub mod collapsible_if;
  83 pub mod const_static_lifetime;
  84 pub mod copies;
  85 pub mod cyclomatic_complexity;
  86 pub mod default_trait_access;
  87 pub mod derive;
  88 pub mod doc;
  89 pub mod double_comparison;
  90 pub mod double_parens;
  91 pub mod drop_forget_ref;
  92 pub mod duration_subsec;
  93 pub mod else_if_without_else;
  94 pub mod empty_enum;
  95 pub mod entry;
  96 pub mod enum_clike;
  97 pub mod enum_glob_use;
  98 pub mod enum_variants;
  99 pub mod eq_op;
 100 pub mod erasing_op;
 101 pub mod escape;
 102 pub mod eta_reduction;
 103 pub mod eval_order_dependence;
 104 pub mod excessive_precision;
 105 pub mod explicit_write;
 106 pub mod fallible_impl_from;
 107 pub mod format;
 108 pub mod formatting;
 109 pub mod functions;
 110 pub mod identity_conversion;
 111 pub mod identity_op;
 112 pub mod if_let_redundant_pattern_matching;
 113 pub mod if_not_else;
 114 pub mod indexing_slicing;
 115 pub mod infallible_destructuring_match;
 116 pub mod infinite_iter;
 117 pub mod inherent_impl;
 118 pub mod inline_fn_without_body;
 119 pub mod int_plus_one;
 120 pub mod invalid_ref;
 121 pub mod items_after_statements;
 122 pub mod large_enum_variant;
 123 pub mod len_zero;
 124 pub mod let_if_seq;
 125 pub mod lifetimes;
 126 pub mod literal_representation;
 127 pub mod loops;
 128 pub mod map_clone;
 129 pub mod map_unit_fn;
 130 pub mod matches;
 131 pub mod mem_forget;
 132 pub mod methods;
 133 pub mod minmax;
 134 pub mod misc;
 135 pub mod misc_early;
 136 pub mod missing_doc;
 137 pub mod missing_inline;
 138 pub mod multiple_crate_versions;
 139 pub mod mut_mut;
 140 pub mod mut_reference;
 141 pub mod mutex_atomic;
 142 pub mod needless_bool;
 143 pub mod needless_borrow;
 144 pub mod needless_borrowed_ref;
 145 pub mod needless_continue;
 146 pub mod needless_pass_by_value;
 147 pub mod needless_update;
 148 pub mod neg_cmp_op_on_partial_ord;
 149 pub mod neg_multiply;
 150 pub mod new_without_default;
 151 pub mod no_effect;
 152 pub mod non_copy_const;
 153 pub mod non_expressive_names;
 154 pub mod ok_if_let;
 155 pub mod open_options;
 156 pub mod overflow_check_conditional;
 157 pub mod panic_unimplemented;
 158 pub mod partialeq_ne_impl;
 159 pub mod precedence;
 160 pub mod ptr;
 161 pub mod question_mark;
 162 pub mod ranges;
 163 pub mod redundant_field_names;
 164 pub mod reference;
 165 pub mod regex;
 166 pub mod replace_consts;
 167 pub mod returns;
 168 pub mod serde_api;
 169 pub mod shadow;
 170 pub mod strings;
 171 pub mod suspicious_trait_impl;
 172 pub mod swap;
 173 pub mod temporary_assignment;
 174 pub mod transmute;
 175 pub mod trivially_copy_pass_by_ref;
 176 pub mod types;
 177 pub mod unicode;
 178 pub mod unsafe_removed_from_name;
 179 pub mod unused_io_amount;
 180 pub mod unused_label;
 181 pub mod unwrap;
 182 pub mod use_self;
 183 pub mod vec;
 184 pub mod write;
 185 pub mod zero_div_zero;
 186 // end lints modules, do not remove this comment, it’s used in `update_lints`
 187
 188 mod reexport {
 189     crate use syntax::ast::{Name, NodeId};
 190 }
 191
 192 #[cfg_attr(rustfmt, rustfmt_skip)]
 193 pub fn register_plugins(reg: &mut rustc_plugin::Registry) {
 194     let conf = match utils::conf::file_from_args(reg.args()) {
 195         Ok(file_name) => {
 196             // if the user specified a file, it must exist, otherwise default to `clippy.toml` but
 197             // do not require the file to exist
 198             let file_name = if let Some(file_name) = file_name {
 199                 Some(file_name)
 200             } else {
 201                 match utils::conf::lookup_conf_file() {
 202                     Ok(path) => path,
 203                     Err(error) => {
 204                         reg.sess.struct_err(&format!("error finding Clippy's configuration file: {}", error)).emit();
 205                         None
 206                     }
 207                 }
 208             };
 209
 210             let file_name = file_name.map(|file_name| if file_name.is_relative() {
 211                 reg.sess
 212                     .local_crate_source_file
 213                     .as_ref()
 214                     .and_then(|file| std::path::Path::new(&file).parent().map(std::path::Path::to_path_buf))
 215                     .unwrap_or_default()
 216                     .join(file_name)
 217             } else {
 218                 file_name
 219             });
 220
 221             let (conf, errors) = utils::conf::read(file_name.as_ref().map(|p| p.as_ref()));
 222
 223             // all conf errors are non-fatal, we just use the default conf in case of error
 224             for error in errors {
 225                 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();
 226             }
 227
 228             conf
 229         }
 230         Err((err, span)) => {
 231             reg.sess.struct_span_err(span, err)
 232                     .span_note(span, "Clippy will use default configuration")
 233                     .emit();
 234             toml::from_str("").expect("we never error on empty config files")
 235         }
 236     };
 237
 238     let mut store = reg.sess.lint_store.borrow_mut();
 239     store.register_removed(
 240         "should_assert_eq",
 241         "`assert!()` will be more flexible with RFC 2011",
 242     );
 243     store.register_removed(
 244         "extend_from_slice",
 245         "`.extend_from_slice(_)` is a faster way to extend a Vec by a slice",
 246     );
 247     store.register_removed(
 248         "range_step_by_zero",
 249         "`iterator.step_by(0)` panics nowadays",
 250     );
 251     store.register_removed(
 252         "unstable_as_slice",
 253         "`Vec::as_slice` has been stabilized in 1.7",
 254     );
 255     store.register_removed(
 256         "unstable_as_mut_slice",
 257         "`Vec::as_mut_slice` has been stabilized in 1.7",
 258     );
 259     store.register_removed(
 260         "str_to_string",
 261         "using `str::to_string` is common even today and specialization will likely happen soon",
 262     );
 263     store.register_removed(
 264         "string_to_string",
 265         "using `string::to_string` is common even today and specialization will likely happen soon",
 266     );
 267     store.register_removed(
 268         "misaligned_transmute",
 269         "this lint has been split into cast_ptr_alignment and transmute_ptr_to_ptr",
 270     );
 271     // end deprecated lints, do not remove this comment, it’s used in `update_lints`
 272
 273     reg.register_late_lint_pass(box serde_api::Serde);
 274     reg.register_early_lint_pass(box utils::internal_lints::Clippy);
 275     reg.register_late_lint_pass(box utils::internal_lints::LintWithoutLintPass::default());
 276     reg.register_late_lint_pass(box utils::inspector::Pass);
 277     reg.register_late_lint_pass(box utils::author::Pass);
 278     reg.register_late_lint_pass(box types::TypePass);
 279     reg.register_late_lint_pass(box booleans::NonminimalBool);
 280     reg.register_late_lint_pass(box eq_op::EqOp);
 281     reg.register_early_lint_pass(box enum_variants::EnumVariantNames::new(conf.enum_variant_name_threshold));
 282     reg.register_late_lint_pass(box enum_glob_use::EnumGlobUse);
 283     reg.register_late_lint_pass(box enum_clike::UnportableVariant);
 284     reg.register_late_lint_pass(box excessive_precision::ExcessivePrecision);
 285     reg.register_late_lint_pass(box bit_mask::BitMask::new(conf.verbose_bit_mask_threshold));
 286     reg.register_late_lint_pass(box ptr::PointerPass);
 287     reg.register_late_lint_pass(box needless_bool::NeedlessBool);
 288     reg.register_late_lint_pass(box needless_bool::BoolComparison);
 289     reg.register_late_lint_pass(box approx_const::Pass);
 290     reg.register_late_lint_pass(box misc::Pass);
 291     reg.register_early_lint_pass(box precedence::Precedence);
 292     reg.register_early_lint_pass(box needless_continue::NeedlessContinue);
 293     reg.register_late_lint_pass(box eta_reduction::EtaPass);
 294     reg.register_late_lint_pass(box identity_op::IdentityOp);
 295     reg.register_late_lint_pass(box erasing_op::ErasingOp);
 296     reg.register_early_lint_pass(box items_after_statements::ItemsAfterStatements);
 297     reg.register_late_lint_pass(box mut_mut::MutMut);
 298     reg.register_late_lint_pass(box mut_reference::UnnecessaryMutPassed);
 299     reg.register_late_lint_pass(box len_zero::LenZero);
 300     reg.register_late_lint_pass(box attrs::AttrPass);
 301     reg.register_early_lint_pass(box collapsible_if::CollapsibleIf);
 302     reg.register_late_lint_pass(box block_in_if_condition::BlockInIfCondition);
 303     reg.register_late_lint_pass(box unicode::Unicode);
 304     reg.register_late_lint_pass(box strings::StringAdd);
 305     reg.register_early_lint_pass(box returns::ReturnPass);
 306     reg.register_late_lint_pass(box methods::Pass);
 307     reg.register_late_lint_pass(box shadow::Pass);
 308     reg.register_late_lint_pass(box types::LetPass);
 309     reg.register_late_lint_pass(box types::UnitCmp);
 310     reg.register_late_lint_pass(box loops::Pass);
 311     reg.register_late_lint_pass(box lifetimes::LifetimePass);
 312     reg.register_late_lint_pass(box entry::HashMapLint);
 313     reg.register_late_lint_pass(box ranges::Pass);
 314     reg.register_late_lint_pass(box types::CastPass);
 315     reg.register_late_lint_pass(box types::TypeComplexityPass::new(conf.type_complexity_threshold));
 316     reg.register_late_lint_pass(box matches::MatchPass);
 317     reg.register_late_lint_pass(box minmax::MinMaxPass);
 318     reg.register_late_lint_pass(box open_options::NonSensical);
 319     reg.register_late_lint_pass(box zero_div_zero::Pass);
 320     reg.register_late_lint_pass(box mutex_atomic::MutexAtomic);
 321     reg.register_late_lint_pass(box needless_update::Pass);
 322     reg.register_late_lint_pass(box needless_borrow::NeedlessBorrow);
 323     reg.register_late_lint_pass(box needless_borrowed_ref::NeedlessBorrowedRef);
 324     reg.register_late_lint_pass(box no_effect::Pass);
 325     reg.register_late_lint_pass(box map_clone::Pass);
 326     reg.register_late_lint_pass(box temporary_assignment::Pass);
 327     reg.register_late_lint_pass(box transmute::Transmute);
 328     reg.register_late_lint_pass(
 329         box cyclomatic_complexity::CyclomaticComplexity::new(conf.cyclomatic_complexity_threshold)
 330     );
 331     reg.register_late_lint_pass(box escape::Pass{too_large_for_stack: conf.too_large_for_stack});
 332     reg.register_early_lint_pass(box misc_early::MiscEarly);
 333     reg.register_late_lint_pass(box panic_unimplemented::Pass);
 334     reg.register_late_lint_pass(box strings::StringLitAsBytes);
 335     reg.register_late_lint_pass(box derive::Derive);
 336     reg.register_late_lint_pass(box types::CharLitAsU8);
 337     reg.register_late_lint_pass(box write::Pass);
 338     reg.register_late_lint_pass(box vec::Pass);
 339     reg.register_early_lint_pass(box non_expressive_names::NonExpressiveNames {
 340         single_char_binding_names_threshold: conf.single_char_binding_names_threshold,
 341     });
 342     reg.register_late_lint_pass(box drop_forget_ref::Pass);
 343     reg.register_late_lint_pass(box empty_enum::EmptyEnum);
 344     reg.register_late_lint_pass(box types::AbsurdExtremeComparisons);
 345     reg.register_late_lint_pass(box types::InvalidUpcastComparisons);
 346     reg.register_late_lint_pass(box regex::Pass::default());
 347     reg.register_late_lint_pass(box copies::CopyAndPaste);
 348     reg.register_late_lint_pass(box format::Pass);
 349     reg.register_early_lint_pass(box formatting::Formatting);
 350     reg.register_late_lint_pass(box swap::Swap);
 351     reg.register_early_lint_pass(box if_not_else::IfNotElse);
 352     reg.register_early_lint_pass(box else_if_without_else::ElseIfWithoutElse);
 353     reg.register_early_lint_pass(box int_plus_one::IntPlusOne);
 354     reg.register_late_lint_pass(box overflow_check_conditional::OverflowCheckConditional);
 355     reg.register_late_lint_pass(box unused_label::UnusedLabel);
 356     reg.register_late_lint_pass(box new_without_default::NewWithoutDefault);
 357     reg.register_late_lint_pass(box blacklisted_name::BlackListedName::new(conf.blacklisted_names));
 358     reg.register_late_lint_pass(box functions::Functions::new(conf.too_many_arguments_threshold));
 359     reg.register_early_lint_pass(box doc::Doc::new(conf.doc_valid_idents));
 360     reg.register_late_lint_pass(box neg_multiply::NegMultiply);
 361     reg.register_early_lint_pass(box unsafe_removed_from_name::UnsafeNameRemoval);
 362     reg.register_late_lint_pass(box mem_forget::MemForget);
 363     reg.register_late_lint_pass(box arithmetic::Arithmetic::default());
 364     reg.register_late_lint_pass(box assign_ops::AssignOps);
 365     reg.register_late_lint_pass(box let_if_seq::LetIfSeq);
 366     reg.register_late_lint_pass(box eval_order_dependence::EvalOrderDependence);
 367     reg.register_late_lint_pass(box missing_doc::MissingDoc::new());
 368     reg.register_late_lint_pass(box missing_inline::MissingInline);
 369     reg.register_late_lint_pass(box ok_if_let::Pass);
 370     reg.register_late_lint_pass(box if_let_redundant_pattern_matching::Pass);
 371     reg.register_late_lint_pass(box partialeq_ne_impl::Pass);
 372     reg.register_early_lint_pass(box reference::Pass);
 373     reg.register_early_lint_pass(box reference::DerefPass);
 374     reg.register_early_lint_pass(box double_parens::DoubleParens);
 375     reg.register_late_lint_pass(box unused_io_amount::UnusedIoAmount);
 376     reg.register_late_lint_pass(box large_enum_variant::LargeEnumVariant::new(conf.enum_variant_size_threshold));
 377     reg.register_late_lint_pass(box explicit_write::Pass);
 378     reg.register_late_lint_pass(box needless_pass_by_value::NeedlessPassByValue);
 379     reg.register_late_lint_pass(box trivially_copy_pass_by_ref::TriviallyCopyPassByRef::new(
 380             conf.trivial_copy_size_limit,
 381             &reg.sess.target,
 382     ));
 383     reg.register_early_lint_pass(box literal_representation::LiteralDigitGrouping);
 384     reg.register_early_lint_pass(box literal_representation::LiteralRepresentation::new(
 385             conf.literal_representation_threshold
 386     ));
 387     reg.register_late_lint_pass(box use_self::UseSelf);
 388     reg.register_late_lint_pass(box bytecount::ByteCount);
 389     reg.register_late_lint_pass(box infinite_iter::Pass);
 390     reg.register_late_lint_pass(box inline_fn_without_body::Pass);
 391     reg.register_late_lint_pass(box invalid_ref::InvalidRef);
 392     reg.register_late_lint_pass(box identity_conversion::IdentityConversion::default());
 393     reg.register_late_lint_pass(box types::ImplicitHasher);
 394     reg.register_early_lint_pass(box const_static_lifetime::StaticConst);
 395     reg.register_late_lint_pass(box fallible_impl_from::FallibleImplFrom);
 396     reg.register_late_lint_pass(box replace_consts::ReplaceConsts);
 397     reg.register_late_lint_pass(box types::UnitArg);
 398     reg.register_late_lint_pass(box double_comparison::DoubleComparisonPass);
 399     reg.register_late_lint_pass(box question_mark::QuestionMarkPass);
 400     reg.register_late_lint_pass(box suspicious_trait_impl::SuspiciousImpl);
 401     reg.register_late_lint_pass(box redundant_field_names::RedundantFieldNames);
 402     reg.register_early_lint_pass(box multiple_crate_versions::Pass);
 403     reg.register_late_lint_pass(box map_unit_fn::Pass);
 404     reg.register_late_lint_pass(box infallible_destructuring_match::Pass);
 405     reg.register_late_lint_pass(box inherent_impl::Pass::default());
 406     reg.register_late_lint_pass(box neg_cmp_op_on_partial_ord::NoNegCompOpForPartialOrd);
 407     reg.register_late_lint_pass(box unwrap::Pass);
 408     reg.register_late_lint_pass(box duration_subsec::DurationSubsec);
 409     reg.register_late_lint_pass(box default_trait_access::DefaultTraitAccess);
 410     reg.register_late_lint_pass(box indexing_slicing::IndexingSlicing);
 411     reg.register_late_lint_pass(box non_copy_const::NonCopyConst);
 412
 413     reg.register_lint_group("clippy_restriction", vec![
 414         arithmetic::FLOAT_ARITHMETIC,
 415         arithmetic::INTEGER_ARITHMETIC,
 416         assign_ops::ASSIGN_OPS,
 417         else_if_without_else::ELSE_IF_WITHOUT_ELSE,
 418         inherent_impl::MULTIPLE_INHERENT_IMPL,
 419         literal_representation::DECIMAL_LITERAL_REPRESENTATION,
 420         mem_forget::MEM_FORGET,
 421         methods::CLONE_ON_REF_PTR,
 422         methods::OPTION_UNWRAP_USED,
 423         methods::RESULT_UNWRAP_USED,
 424         methods::WRONG_PUB_SELF_CONVENTION,
 425         misc::FLOAT_CMP_CONST,
 426         missing_doc::MISSING_DOCS_IN_PRIVATE_ITEMS,
 427         missing_inline::MISSING_INLINE_IN_PUBLIC_ITEMS,
 428         panic_unimplemented::UNIMPLEMENTED,
 429         shadow::SHADOW_REUSE,
 430         shadow::SHADOW_SAME,
 431         shadow::SHADOW_UNRELATED,
 432         strings::STRING_ADD,
 433         write::PRINT_STDOUT,
 434         write::USE_DEBUG,
 435     ]);
 436
 437     reg.register_lint_group("clippy_pedantic", vec![
 438         attrs::INLINE_ALWAYS,
 439         copies::MATCH_SAME_ARMS,
 440         default_trait_access::DEFAULT_TRAIT_ACCESS,
 441         derive::EXPL_IMPL_CLONE_ON_COPY,
 442         doc::DOC_MARKDOWN,
 443         empty_enum::EMPTY_ENUM,
 444         enum_glob_use::ENUM_GLOB_USE,
 445         enum_variants::PUB_ENUM_VARIANT_NAMES,
 446         enum_variants::STUTTER,
 447         if_not_else::IF_NOT_ELSE,
 448         indexing_slicing::INDEXING_SLICING,
 449         infinite_iter::MAYBE_INFINITE_ITER,
 450         items_after_statements::ITEMS_AFTER_STATEMENTS,
 451         matches::SINGLE_MATCH_ELSE,
 452         methods::FILTER_MAP,
 453         methods::OPTION_MAP_UNWRAP_OR,
 454         methods::OPTION_MAP_UNWRAP_OR_ELSE,
 455         methods::RESULT_MAP_UNWRAP_OR_ELSE,
 456         misc::USED_UNDERSCORE_BINDING,
 457         misc_early::UNSEPARATED_LITERAL_SUFFIX,
 458         mut_mut::MUT_MUT,
 459         needless_continue::NEEDLESS_CONTINUE,
 460         non_expressive_names::SIMILAR_NAMES,
 461         replace_consts::REPLACE_CONSTS,
 462         strings::STRING_ADD_ASSIGN,
 463         types::CAST_POSSIBLE_TRUNCATION,
 464         types::CAST_POSSIBLE_WRAP,
 465         types::CAST_PRECISION_LOSS,
 466         types::CAST_SIGN_LOSS,
 467         types::INVALID_UPCAST_COMPARISONS,
 468         types::LINKEDLIST,
 469         unicode::NON_ASCII_LITERAL,
 470         unicode::UNICODE_NOT_NFC,
 471         use_self::USE_SELF,
 472     ]);
 473
 474     reg.register_lint_group("clippy_internal", vec![
 475         utils::internal_lints::CLIPPY_LINTS_INTERNAL,
 476         utils::internal_lints::LINT_WITHOUT_LINT_PASS,
 477     ]);
 478
 479     reg.register_lint_group("clippy", vec![
 480         approx_const::APPROX_CONSTANT,
 481         assign_ops::ASSIGN_OP_PATTERN,
 482         assign_ops::MISREFACTORED_ASSIGN_OP,
 483         attrs::DEPRECATED_SEMVER,
 484         attrs::USELESS_ATTRIBUTE,
 485         bit_mask::BAD_BIT_MASK,
 486         bit_mask::INEFFECTIVE_BIT_MASK,
 487         bit_mask::VERBOSE_BIT_MASK,
 488         blacklisted_name::BLACKLISTED_NAME,
 489         block_in_if_condition::BLOCK_IN_IF_CONDITION_EXPR,
 490         block_in_if_condition::BLOCK_IN_IF_CONDITION_STMT,
 491         booleans::LOGIC_BUG,
 492         booleans::NONMINIMAL_BOOL,
 493         bytecount::NAIVE_BYTECOUNT,
 494         collapsible_if::COLLAPSIBLE_IF,
 495         const_static_lifetime::CONST_STATIC_LIFETIME,
 496         copies::IF_SAME_THEN_ELSE,
 497         copies::IFS_SAME_COND,
 498         cyclomatic_complexity::CYCLOMATIC_COMPLEXITY,
 499         derive::DERIVE_HASH_XOR_EQ,
 500         double_comparison::DOUBLE_COMPARISONS,
 501         double_parens::DOUBLE_PARENS,
 502         drop_forget_ref::DROP_COPY,
 503         drop_forget_ref::DROP_REF,
 504         drop_forget_ref::FORGET_COPY,
 505         drop_forget_ref::FORGET_REF,
 506         duration_subsec::DURATION_SUBSEC,
 507         entry::MAP_ENTRY,
 508         enum_clike::ENUM_CLIKE_UNPORTABLE_VARIANT,
 509         enum_variants::ENUM_VARIANT_NAMES,
 510         enum_variants::MODULE_INCEPTION,
 511         eq_op::EQ_OP,
 512         eq_op::OP_REF,
 513         erasing_op::ERASING_OP,
 514         escape::BOXED_LOCAL,
 515         eta_reduction::REDUNDANT_CLOSURE,
 516         eval_order_dependence::DIVERGING_SUB_EXPRESSION,
 517         eval_order_dependence::EVAL_ORDER_DEPENDENCE,
 518         excessive_precision::EXCESSIVE_PRECISION,
 519         explicit_write::EXPLICIT_WRITE,
 520         format::USELESS_FORMAT,
 521         formatting::POSSIBLE_MISSING_COMMA,
 522         formatting::SUSPICIOUS_ASSIGNMENT_FORMATTING,
 523         formatting::SUSPICIOUS_ELSE_FORMATTING,
 524         functions::NOT_UNSAFE_PTR_ARG_DEREF,
 525         functions::TOO_MANY_ARGUMENTS,
 526         identity_conversion::IDENTITY_CONVERSION,
 527         identity_op::IDENTITY_OP,
 528         if_let_redundant_pattern_matching::IF_LET_REDUNDANT_PATTERN_MATCHING,
 529         indexing_slicing::OUT_OF_BOUNDS_INDEXING,
 530         infallible_destructuring_match::INFALLIBLE_DESTRUCTURING_MATCH,
 531         infinite_iter::INFINITE_ITER,
 532         inline_fn_without_body::INLINE_FN_WITHOUT_BODY,
 533         int_plus_one::INT_PLUS_ONE,
 534         invalid_ref::INVALID_REF,
 535         large_enum_variant::LARGE_ENUM_VARIANT,
 536         len_zero::LEN_WITHOUT_IS_EMPTY,
 537         len_zero::LEN_ZERO,
 538         let_if_seq::USELESS_LET_IF_SEQ,
 539         lifetimes::EXTRA_UNUSED_LIFETIMES,
 540         lifetimes::NEEDLESS_LIFETIMES,
 541         literal_representation::INCONSISTENT_DIGIT_GROUPING,
 542         literal_representation::LARGE_DIGIT_GROUPS,
 543         literal_representation::UNREADABLE_LITERAL,
 544         loops::EMPTY_LOOP,
 545         loops::EXPLICIT_COUNTER_LOOP,
 546         loops::EXPLICIT_INTO_ITER_LOOP,
 547         loops::EXPLICIT_ITER_LOOP,
 548         loops::FOR_KV_MAP,
 549         loops::FOR_LOOP_OVER_OPTION,
 550         loops::FOR_LOOP_OVER_RESULT,
 551         loops::ITER_NEXT_LOOP,
 552         loops::MANUAL_MEMCPY,
 553         loops::MUT_RANGE_BOUND,
 554         loops::NEEDLESS_RANGE_LOOP,
 555         loops::NEVER_LOOP,
 556         loops::REVERSE_RANGE_LOOP,
 557         loops::UNUSED_COLLECT,
 558         loops::WHILE_IMMUTABLE_CONDITION,
 559         loops::WHILE_LET_LOOP,
 560         loops::WHILE_LET_ON_ITERATOR,
 561         map_clone::MAP_CLONE,
 562         map_unit_fn::OPTION_MAP_UNIT_FN,
 563         map_unit_fn::RESULT_MAP_UNIT_FN,
 564         matches::MATCH_AS_REF,
 565         matches::MATCH_BOOL,
 566         matches::MATCH_OVERLAPPING_ARM,
 567         matches::MATCH_REF_PATS,
 568         matches::MATCH_WILD_ERR_ARM,
 569         matches::SINGLE_MATCH,
 570         methods::CHARS_LAST_CMP,
 571         methods::CHARS_NEXT_CMP,
 572         methods::CLONE_DOUBLE_REF,
 573         methods::CLONE_ON_COPY,
 574         methods::EXPECT_FUN_CALL,
 575         methods::FILTER_NEXT,
 576         methods::GET_UNWRAP,
 577         methods::ITER_CLONED_COLLECT,
 578         methods::ITER_NTH,
 579         methods::ITER_SKIP_NEXT,
 580         methods::NEW_RET_NO_SELF,
 581         methods::OK_EXPECT,
 582         methods::OPTION_MAP_OR_NONE,
 583         methods::OR_FUN_CALL,
 584         methods::SEARCH_IS_SOME,
 585         methods::SHOULD_IMPLEMENT_TRAIT,
 586         methods::SINGLE_CHAR_PATTERN,
 587         methods::STRING_EXTEND_CHARS,
 588         methods::TEMPORARY_CSTRING_AS_PTR,
 589         methods::UNNECESSARY_FOLD,
 590         methods::USELESS_ASREF,
 591         methods::WRONG_SELF_CONVENTION,
 592         minmax::MIN_MAX,
 593         misc::CMP_NAN,
 594         misc::CMP_OWNED,
 595         misc::FLOAT_CMP,
 596         misc::MODULO_ONE,
 597         misc::REDUNDANT_PATTERN,
 598         misc::SHORT_CIRCUIT_STATEMENT,
 599         misc::TOPLEVEL_REF_ARG,
 600         misc::ZERO_PTR,
 601         misc_early::BUILTIN_TYPE_SHADOW,
 602         misc_early::DOUBLE_NEG,
 603         misc_early::DUPLICATE_UNDERSCORE_ARGUMENT,
 604         misc_early::MIXED_CASE_HEX_LITERALS,
 605         misc_early::REDUNDANT_CLOSURE_CALL,
 606         misc_early::UNNEEDED_FIELD_PATTERN,
 607         misc_early::ZERO_PREFIXED_LITERAL,
 608         mut_reference::UNNECESSARY_MUT_PASSED,
 609         mutex_atomic::MUTEX_ATOMIC,
 610         needless_bool::BOOL_COMPARISON,
 611         needless_bool::NEEDLESS_BOOL,
 612         needless_borrowed_ref::NEEDLESS_BORROWED_REFERENCE,
 613         needless_pass_by_value::NEEDLESS_PASS_BY_VALUE,
 614         needless_update::NEEDLESS_UPDATE,
 615         neg_cmp_op_on_partial_ord::NEG_CMP_OP_ON_PARTIAL_ORD,
 616         neg_multiply::NEG_MULTIPLY,
 617         new_without_default::NEW_WITHOUT_DEFAULT,
 618         new_without_default::NEW_WITHOUT_DEFAULT_DERIVE,
 619         no_effect::NO_EFFECT,
 620         no_effect::UNNECESSARY_OPERATION,
 621         non_copy_const::BORROW_INTERIOR_MUTABLE_CONST,
 622         non_copy_const::DECLARE_INTERIOR_MUTABLE_CONST,
 623         non_expressive_names::JUST_UNDERSCORES_AND_DIGITS,
 624         non_expressive_names::MANY_SINGLE_CHAR_NAMES,
 625         ok_if_let::IF_LET_SOME_RESULT,
 626         open_options::NONSENSICAL_OPEN_OPTIONS,
 627         overflow_check_conditional::OVERFLOW_CHECK_CONDITIONAL,
 628         panic_unimplemented::PANIC_PARAMS,
 629         partialeq_ne_impl::PARTIALEQ_NE_IMPL,
 630         precedence::PRECEDENCE,
 631         ptr::CMP_NULL,
 632         ptr::MUT_FROM_REF,
 633         ptr::PTR_ARG,
 634         question_mark::QUESTION_MARK,
 635         ranges::ITERATOR_STEP_BY_ZERO,
 636         ranges::RANGE_MINUS_ONE,
 637         ranges::RANGE_ZIP_WITH_LEN,
 638         redundant_field_names::REDUNDANT_FIELD_NAMES,
 639         reference::DEREF_ADDROF,
 640         reference::REF_IN_DEREF,
 641         regex::INVALID_REGEX,
 642         regex::REGEX_MACRO,
 643         regex::TRIVIAL_REGEX,
 644         returns::LET_AND_RETURN,
 645         returns::NEEDLESS_RETURN,
 646         serde_api::SERDE_API_MISUSE,
 647         strings::STRING_LIT_AS_BYTES,
 648         suspicious_trait_impl::SUSPICIOUS_ARITHMETIC_IMPL,
 649         suspicious_trait_impl::SUSPICIOUS_OP_ASSIGN_IMPL,
 650         swap::ALMOST_SWAPPED,
 651         swap::MANUAL_SWAP,
 652         temporary_assignment::TEMPORARY_ASSIGNMENT,
 653         transmute::CROSSPOINTER_TRANSMUTE,
 654         transmute::TRANSMUTE_BYTES_TO_STR,
 655         transmute::TRANSMUTE_INT_TO_BOOL,
 656         transmute::TRANSMUTE_INT_TO_CHAR,
 657         transmute::TRANSMUTE_INT_TO_FLOAT,
 658         transmute::TRANSMUTE_PTR_TO_PTR,
 659         transmute::TRANSMUTE_PTR_TO_REF,
 660         transmute::USELESS_TRANSMUTE,
 661         transmute::WRONG_TRANSMUTE,
 662         trivially_copy_pass_by_ref::TRIVIALLY_COPY_PASS_BY_REF,
 663         types::ABSURD_EXTREME_COMPARISONS,
 664         types::BORROWED_BOX,
 665         types::BOX_VEC,
 666         types::CAST_LOSSLESS,
 667         types::CAST_PTR_ALIGNMENT,
 668         types::CHAR_LIT_AS_U8,
 669         types::FN_TO_NUMERIC_CAST,
 670         types::FN_TO_NUMERIC_CAST_WITH_TRUNCATION,
 671         types::IMPLICIT_HASHER,
 672         types::LET_UNIT_VALUE,
 673         types::OPTION_OPTION,
 674         types::TYPE_COMPLEXITY,
 675         types::UNIT_ARG,
 676         types::UNIT_CMP,
 677         types::UNNECESSARY_CAST,
 678         unicode::ZERO_WIDTH_SPACE,
 679         unsafe_removed_from_name::UNSAFE_REMOVED_FROM_NAME,
 680         unused_io_amount::UNUSED_IO_AMOUNT,
 681         unused_label::UNUSED_LABEL,
 682         vec::USELESS_VEC,
 683         write::PRINT_LITERAL,
 684         write::PRINT_WITH_NEWLINE,
 685         write::PRINTLN_EMPTY_STRING,
 686         write::WRITE_LITERAL,
 687         write::WRITE_WITH_NEWLINE,
 688         write::WRITELN_EMPTY_STRING,
 689         zero_div_zero::ZERO_DIVIDED_BY_ZERO,
 690     ]);
 691
 692     reg.register_lint_group("clippy_style", vec![
 693         assign_ops::ASSIGN_OP_PATTERN,
 694         bit_mask::VERBOSE_BIT_MASK,
 695         blacklisted_name::BLACKLISTED_NAME,
 696         block_in_if_condition::BLOCK_IN_IF_CONDITION_EXPR,
 697         block_in_if_condition::BLOCK_IN_IF_CONDITION_STMT,
 698         collapsible_if::COLLAPSIBLE_IF,
 699         const_static_lifetime::CONST_STATIC_LIFETIME,
 700         enum_variants::ENUM_VARIANT_NAMES,
 701         enum_variants::MODULE_INCEPTION,
 702         eq_op::OP_REF,
 703         eta_reduction::REDUNDANT_CLOSURE,
 704         excessive_precision::EXCESSIVE_PRECISION,
 705         formatting::SUSPICIOUS_ASSIGNMENT_FORMATTING,
 706         formatting::SUSPICIOUS_ELSE_FORMATTING,
 707         if_let_redundant_pattern_matching::IF_LET_REDUNDANT_PATTERN_MATCHING,
 708         infallible_destructuring_match::INFALLIBLE_DESTRUCTURING_MATCH,
 709         len_zero::LEN_WITHOUT_IS_EMPTY,
 710         len_zero::LEN_ZERO,
 711         let_if_seq::USELESS_LET_IF_SEQ,
 712         literal_representation::INCONSISTENT_DIGIT_GROUPING,
 713         literal_representation::LARGE_DIGIT_GROUPS,
 714         literal_representation::UNREADABLE_LITERAL,
 715         loops::EMPTY_LOOP,
 716         loops::EXPLICIT_INTO_ITER_LOOP,
 717         loops::EXPLICIT_ITER_LOOP,
 718         loops::FOR_KV_MAP,
 719         loops::NEEDLESS_RANGE_LOOP,
 720         loops::WHILE_LET_ON_ITERATOR,
 721         map_clone::MAP_CLONE,
 722         matches::MATCH_BOOL,
 723         matches::MATCH_OVERLAPPING_ARM,
 724         matches::MATCH_REF_PATS,
 725         matches::MATCH_WILD_ERR_ARM,
 726         matches::SINGLE_MATCH,
 727         methods::CHARS_LAST_CMP,
 728         methods::GET_UNWRAP,
 729         methods::ITER_CLONED_COLLECT,
 730         methods::ITER_SKIP_NEXT,
 731         methods::NEW_RET_NO_SELF,
 732         methods::OK_EXPECT,
 733         methods::OPTION_MAP_OR_NONE,
 734         methods::SHOULD_IMPLEMENT_TRAIT,
 735         methods::STRING_EXTEND_CHARS,
 736         methods::UNNECESSARY_FOLD,
 737         methods::WRONG_SELF_CONVENTION,
 738         misc::REDUNDANT_PATTERN,
 739         misc::TOPLEVEL_REF_ARG,
 740         misc::ZERO_PTR,
 741         misc_early::BUILTIN_TYPE_SHADOW,
 742         misc_early::DOUBLE_NEG,
 743         misc_early::DUPLICATE_UNDERSCORE_ARGUMENT,
 744         misc_early::MIXED_CASE_HEX_LITERALS,
 745         misc_early::UNNEEDED_FIELD_PATTERN,
 746         mut_reference::UNNECESSARY_MUT_PASSED,
 747         needless_pass_by_value::NEEDLESS_PASS_BY_VALUE,
 748         neg_multiply::NEG_MULTIPLY,
 749         new_without_default::NEW_WITHOUT_DEFAULT,
 750         new_without_default::NEW_WITHOUT_DEFAULT_DERIVE,
 751         non_expressive_names::JUST_UNDERSCORES_AND_DIGITS,
 752         non_expressive_names::MANY_SINGLE_CHAR_NAMES,
 753         ok_if_let::IF_LET_SOME_RESULT,
 754         panic_unimplemented::PANIC_PARAMS,
 755         ptr::CMP_NULL,
 756         ptr::PTR_ARG,
 757         question_mark::QUESTION_MARK,
 758         ranges::RANGE_MINUS_ONE,
 759         redundant_field_names::REDUNDANT_FIELD_NAMES,
 760         regex::REGEX_MACRO,
 761         regex::TRIVIAL_REGEX,
 762         returns::LET_AND_RETURN,
 763         returns::NEEDLESS_RETURN,
 764         strings::STRING_LIT_AS_BYTES,
 765         types::FN_TO_NUMERIC_CAST,
 766         types::IMPLICIT_HASHER,
 767         types::LET_UNIT_VALUE,
 768         unsafe_removed_from_name::UNSAFE_REMOVED_FROM_NAME,
 769         write::PRINT_LITERAL,
 770         write::PRINT_WITH_NEWLINE,
 771         write::PRINTLN_EMPTY_STRING,
 772         write::WRITE_LITERAL,
 773         write::WRITE_WITH_NEWLINE,
 774         write::WRITELN_EMPTY_STRING,
 775     ]);
 776
 777     reg.register_lint_group("clippy_complexity", vec![
 778         assign_ops::MISREFACTORED_ASSIGN_OP,
 779         booleans::NONMINIMAL_BOOL,
 780         cyclomatic_complexity::CYCLOMATIC_COMPLEXITY,
 781         double_comparison::DOUBLE_COMPARISONS,
 782         double_parens::DOUBLE_PARENS,
 783         duration_subsec::DURATION_SUBSEC,
 784         eval_order_dependence::DIVERGING_SUB_EXPRESSION,
 785         eval_order_dependence::EVAL_ORDER_DEPENDENCE,
 786         explicit_write::EXPLICIT_WRITE,
 787         format::USELESS_FORMAT,
 788         functions::TOO_MANY_ARGUMENTS,
 789         identity_conversion::IDENTITY_CONVERSION,
 790         identity_op::IDENTITY_OP,
 791         int_plus_one::INT_PLUS_ONE,
 792         lifetimes::EXTRA_UNUSED_LIFETIMES,
 793         lifetimes::NEEDLESS_LIFETIMES,
 794         loops::EXPLICIT_COUNTER_LOOP,
 795         loops::MUT_RANGE_BOUND,
 796         loops::WHILE_LET_LOOP,
 797         map_unit_fn::OPTION_MAP_UNIT_FN,
 798         map_unit_fn::RESULT_MAP_UNIT_FN,
 799         matches::MATCH_AS_REF,
 800         methods::CHARS_NEXT_CMP,
 801         methods::CLONE_ON_COPY,
 802         methods::FILTER_NEXT,
 803         methods::SEARCH_IS_SOME,
 804         methods::USELESS_ASREF,
 805         misc::SHORT_CIRCUIT_STATEMENT,
 806         misc_early::REDUNDANT_CLOSURE_CALL,
 807         misc_early::ZERO_PREFIXED_LITERAL,
 808         needless_bool::BOOL_COMPARISON,
 809         needless_bool::NEEDLESS_BOOL,
 810         needless_borrowed_ref::NEEDLESS_BORROWED_REFERENCE,
 811         needless_update::NEEDLESS_UPDATE,
 812         neg_cmp_op_on_partial_ord::NEG_CMP_OP_ON_PARTIAL_ORD,
 813         no_effect::NO_EFFECT,
 814         no_effect::UNNECESSARY_OPERATION,
 815         overflow_check_conditional::OVERFLOW_CHECK_CONDITIONAL,
 816         partialeq_ne_impl::PARTIALEQ_NE_IMPL,
 817         precedence::PRECEDENCE,
 818         ranges::RANGE_ZIP_WITH_LEN,
 819         reference::DEREF_ADDROF,
 820         reference::REF_IN_DEREF,
 821         swap::MANUAL_SWAP,
 822         temporary_assignment::TEMPORARY_ASSIGNMENT,
 823         transmute::CROSSPOINTER_TRANSMUTE,
 824         transmute::TRANSMUTE_BYTES_TO_STR,
 825         transmute::TRANSMUTE_INT_TO_BOOL,
 826         transmute::TRANSMUTE_INT_TO_CHAR,
 827         transmute::TRANSMUTE_INT_TO_FLOAT,
 828         transmute::TRANSMUTE_PTR_TO_PTR,
 829         transmute::TRANSMUTE_PTR_TO_REF,
 830         transmute::USELESS_TRANSMUTE,
 831         types::BORROWED_BOX,
 832         types::CAST_LOSSLESS,
 833         types::CHAR_LIT_AS_U8,
 834         types::OPTION_OPTION,
 835         types::TYPE_COMPLEXITY,
 836         types::UNIT_ARG,
 837         types::UNNECESSARY_CAST,
 838         unused_label::UNUSED_LABEL,
 839         zero_div_zero::ZERO_DIVIDED_BY_ZERO,
 840     ]);
 841
 842     reg.register_lint_group("clippy_correctness", vec![
 843         approx_const::APPROX_CONSTANT,
 844         attrs::DEPRECATED_SEMVER,
 845         attrs::USELESS_ATTRIBUTE,
 846         bit_mask::BAD_BIT_MASK,
 847         bit_mask::INEFFECTIVE_BIT_MASK,
 848         booleans::LOGIC_BUG,
 849         copies::IF_SAME_THEN_ELSE,
 850         copies::IFS_SAME_COND,
 851         derive::DERIVE_HASH_XOR_EQ,
 852         drop_forget_ref::DROP_COPY,
 853         drop_forget_ref::DROP_REF,
 854         drop_forget_ref::FORGET_COPY,
 855         drop_forget_ref::FORGET_REF,
 856         enum_clike::ENUM_CLIKE_UNPORTABLE_VARIANT,
 857         eq_op::EQ_OP,
 858         erasing_op::ERASING_OP,
 859         formatting::POSSIBLE_MISSING_COMMA,
 860         functions::NOT_UNSAFE_PTR_ARG_DEREF,
 861         indexing_slicing::OUT_OF_BOUNDS_INDEXING,
 862         infinite_iter::INFINITE_ITER,
 863         inline_fn_without_body::INLINE_FN_WITHOUT_BODY,
 864         invalid_ref::INVALID_REF,
 865         loops::FOR_LOOP_OVER_OPTION,
 866         loops::FOR_LOOP_OVER_RESULT,
 867         loops::ITER_NEXT_LOOP,
 868         loops::NEVER_LOOP,
 869         loops::REVERSE_RANGE_LOOP,
 870         loops::WHILE_IMMUTABLE_CONDITION,
 871         methods::CLONE_DOUBLE_REF,
 872         methods::TEMPORARY_CSTRING_AS_PTR,
 873         minmax::MIN_MAX,
 874         misc::CMP_NAN,
 875         misc::FLOAT_CMP,
 876         misc::MODULO_ONE,
 877         non_copy_const::BORROW_INTERIOR_MUTABLE_CONST,
 878         non_copy_const::DECLARE_INTERIOR_MUTABLE_CONST,
 879         open_options::NONSENSICAL_OPEN_OPTIONS,
 880         ptr::MUT_FROM_REF,
 881         ranges::ITERATOR_STEP_BY_ZERO,
 882         regex::INVALID_REGEX,
 883         serde_api::SERDE_API_MISUSE,
 884         suspicious_trait_impl::SUSPICIOUS_ARITHMETIC_IMPL,
 885         suspicious_trait_impl::SUSPICIOUS_OP_ASSIGN_IMPL,
 886         swap::ALMOST_SWAPPED,
 887         transmute::WRONG_TRANSMUTE,
 888         types::ABSURD_EXTREME_COMPARISONS,
 889         types::CAST_PTR_ALIGNMENT,
 890         types::FN_TO_NUMERIC_CAST_WITH_TRUNCATION,
 891         types::UNIT_CMP,
 892         unicode::ZERO_WIDTH_SPACE,
 893         unused_io_amount::UNUSED_IO_AMOUNT,
 894     ]);
 895
 896     reg.register_lint_group("clippy_perf", vec![
 897         bytecount::NAIVE_BYTECOUNT,
 898         entry::MAP_ENTRY,
 899         escape::BOXED_LOCAL,
 900         large_enum_variant::LARGE_ENUM_VARIANT,
 901         loops::MANUAL_MEMCPY,
 902         loops::UNUSED_COLLECT,
 903         methods::EXPECT_FUN_CALL,
 904         methods::ITER_NTH,
 905         methods::OR_FUN_CALL,
 906         methods::SINGLE_CHAR_PATTERN,
 907         misc::CMP_OWNED,
 908         mutex_atomic::MUTEX_ATOMIC,
 909         trivially_copy_pass_by_ref::TRIVIALLY_COPY_PASS_BY_REF,
 910         types::BOX_VEC,
 911         vec::USELESS_VEC,
 912     ]);
 913
 914     reg.register_lint_group("clippy_cargo", vec![
 915         multiple_crate_versions::MULTIPLE_CRATE_VERSIONS,
 916     ]);
 917
 918     reg.register_lint_group("clippy_nursery", vec![
 919         attrs::EMPTY_LINE_AFTER_OUTER_ATTR,
 920         fallible_impl_from::FALLIBLE_IMPL_FROM,
 921         mutex_atomic::MUTEX_INTEGER,
 922         needless_borrow::NEEDLESS_BORROW,
 923         ranges::RANGE_PLUS_ONE,
 924         unwrap::PANICKING_UNWRAP,
 925         unwrap::UNNECESSARY_UNWRAP,
 926     ]);
 927 }
 928
 929 // only exists to let the dogfood integration test works.
 930 // Don't run clippy as an executable directly
 931 #[allow(dead_code, print_stdout)]
 932 fn main() {
 933     panic!("Please use the cargo-clippy executable");
 934 }