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