clippy_lints/src/lib.rs

   1 // error-pattern:cargo-clippy
   2
   3 #![feature(box_syntax)]
   4 #![feature(collections)]
   5 #![feature(custom_attribute)]
   6 #![feature(i128_type)]
   7 #![feature(i128)]
   8 #![feature(rustc_private)]
   9 #![feature(slice_patterns)]
  10 #![feature(stmt_expr_attributes)]
  11 #![feature(conservative_impl_trait)]
  12 #![feature(collections_bound)]
  13
  14 #![allow(indexing_slicing, shadow_reuse, unknown_lints, missing_docs_in_private_items)]
  15 #![allow(needless_lifetimes)]
  16
  17 extern crate syntax;
  18 #[macro_use]
  19 extern crate rustc;
  20 extern crate rustc_data_structures;
  21
  22 extern crate toml;
  23
  24 // Only for the compile time checking of paths
  25 extern crate core;
  26 extern crate collections;
  27
  28 // for unicode nfc normalization
  29 extern crate unicode_normalization;
  30
  31 // for semver check in attrs.rs
  32 extern crate semver;
  33
  34 // for regex checking
  35 extern crate regex_syntax;
  36
  37 // for finding minimal boolean expressions
  38 extern crate quine_mc_cluskey;
  39
  40 extern crate rustc_errors;
  41 extern crate rustc_plugin;
  42 extern crate rustc_const_eval;
  43 extern crate rustc_const_math;
  44
  45 #[macro_use]
  46 extern crate matches as matches_macro;
  47
  48 macro_rules! declare_restriction_lint {
  49     { pub $name:tt, $description:tt } => {
  50         declare_lint! { pub $name, Allow, $description }
  51     };
  52 }
  53
  54 pub mod consts;
  55 #[macro_use]
  56 pub mod utils;
  57
  58 // begin lints modules, do not remove this comment, it’s used in `update_lints`
  59 pub mod approx_const;
  60 pub mod arithmetic;
  61 pub mod array_indexing;
  62 pub mod assign_ops;
  63 pub mod attrs;
  64 pub mod bit_mask;
  65 pub mod blacklisted_name;
  66 pub mod block_in_if_condition;
  67 pub mod booleans;
  68 pub mod collapsible_if;
  69 pub mod copies;
  70 pub mod cyclomatic_complexity;
  71 pub mod derive;
  72 pub mod doc;
  73 pub mod double_parens;
  74 pub mod drop_forget_ref;
  75 pub mod empty_enum;
  76 pub mod entry;
  77 pub mod enum_clike;
  78 pub mod enum_glob_use;
  79 pub mod enum_variants;
  80 pub mod eq_op;
  81 pub mod escape;
  82 pub mod eta_reduction;
  83 pub mod eval_order_dependence;
  84 pub mod format;
  85 pub mod formatting;
  86 pub mod functions;
  87 pub mod identity_op;
  88 pub mod if_let_redundant_pattern_matching;
  89 pub mod if_not_else;
  90 pub mod items_after_statements;
  91 pub mod large_enum_variant;
  92 pub mod len_zero;
  93 pub mod let_if_seq;
  94 pub mod lifetimes;
  95 pub mod loops;
  96 pub mod map_clone;
  97 pub mod matches;
  98 pub mod mem_forget;
  99 pub mod methods;
 100 pub mod minmax;
 101 pub mod misc;
 102 pub mod misc_early;
 103 pub mod missing_doc;
 104 pub mod mut_mut;
 105 pub mod mut_reference;
 106 pub mod mutex_atomic;
 107 pub mod needless_bool;
 108 pub mod needless_borrow;
 109 pub mod needless_update;
 110 pub mod neg_multiply;
 111 pub mod new_without_default;
 112 pub mod no_effect;
 113 pub mod non_expressive_names;
 114 pub mod ok_if_let;
 115 pub mod open_options;
 116 pub mod overflow_check_conditional;
 117 pub mod panic;
 118 pub mod partialeq_ne_impl;
 119 pub mod precedence;
 120 pub mod print;
 121 pub mod ptr;
 122 pub mod ranges;
 123 pub mod reference;
 124 pub mod regex;
 125 pub mod returns;
 126 pub mod serde;
 127 pub mod shadow;
 128 pub mod strings;
 129 pub mod swap;
 130 pub mod temporary_assignment;
 131 pub mod transmute;
 132 pub mod types;
 133 pub mod unicode;
 134 pub mod unsafe_removed_from_name;
 135 pub mod unused_io_amount;
 136 pub mod unused_label;
 137 pub mod vec;
 138 pub mod zero_div_zero;
 139 // end lints modules, do not remove this comment, it’s used in `update_lints`
 140
 141 mod reexport {
 142     pub use syntax::ast::{Name, NodeId};
 143 }
 144
 145 #[cfg_attr(rustfmt, rustfmt_skip)]
 146 pub fn register_plugins(reg: &mut rustc_plugin::Registry) {
 147     let conf = match utils::conf::file_from_args(reg.args()) {
 148         Ok(file_name) => {
 149             // if the user specified a file, it must exist, otherwise default to `clippy.toml` but
 150             // do not require the file to exist
 151             let file_name = if let Some(file_name) = file_name {
 152                 Some(file_name)
 153             } else {
 154                 match utils::conf::lookup_conf_file() {
 155                     Ok(path) => path,
 156                     Err(error) => {
 157                         reg.sess.struct_err(&format!("error reading Clippy's configuration file: {}", error)).emit();
 158                         None
 159                     }
 160                 }
 161             };
 162
 163             let (conf, errors) = utils::conf::read(file_name.as_ref().map(|p| p.as_ref()));
 164
 165             // all conf errors are non-fatal, we just use the default conf in case of error
 166             for error in errors {
 167                 reg.sess.struct_err(&format!("error reading Clippy's configuration file: {}", error)).emit();
 168             }
 169
 170             conf
 171         }
 172         Err((err, span)) => {
 173             reg.sess.struct_span_err(span, err)
 174                     .span_note(span, "Clippy will use default configuration")
 175                     .emit();
 176             utils::conf::Conf::default()
 177         }
 178     };
 179
 180     let mut store = reg.sess.lint_store.borrow_mut();
 181     store.register_removed(
 182         "extend_from_slice",
 183         "`.extend_from_slice(_)` is a faster way to extend a Vec by a slice",
 184     );
 185     store.register_removed(
 186         "unstable_as_slice",
 187         "`Vec::as_slice` has been stabilized in 1.7",
 188     );
 189     store.register_removed(
 190         "unstable_as_mut_slice",
 191         "`Vec::as_mut_slice` has been stabilized in 1.7",
 192     );
 193     store.register_removed(
 194         "str_to_string",
 195         "using `str::to_string` is common even today and specialization will likely happen soon",
 196     );
 197     store.register_removed(
 198         "string_to_string",
 199         "using `string::to_string` is common even today and specialization will likely happen soon",
 200     );
 201     // end deprecated lints, do not remove this comment, it’s used in `update_lints`
 202
 203     reg.register_late_lint_pass(box serde::Serde);
 204     reg.register_early_lint_pass(box utils::internal_lints::Clippy);
 205     reg.register_late_lint_pass(box utils::internal_lints::LintWithoutLintPass::default());
 206     reg.register_late_lint_pass(box utils::inspector::Pass);
 207     reg.register_late_lint_pass(box types::TypePass);
 208     reg.register_late_lint_pass(box booleans::NonminimalBool);
 209     reg.register_late_lint_pass(box eq_op::EqOp);
 210     reg.register_early_lint_pass(box enum_variants::EnumVariantNames::new(conf.enum_variant_name_threshold));
 211     reg.register_late_lint_pass(box enum_glob_use::EnumGlobUse);
 212     reg.register_late_lint_pass(box enum_clike::UnportableVariant);
 213     reg.register_late_lint_pass(box bit_mask::BitMask);
 214     reg.register_late_lint_pass(box ptr::PointerPass);
 215     reg.register_late_lint_pass(box needless_bool::NeedlessBool);
 216     reg.register_late_lint_pass(box needless_bool::BoolComparison);
 217     reg.register_late_lint_pass(box approx_const::Pass);
 218     reg.register_late_lint_pass(box misc::Pass);
 219     reg.register_early_lint_pass(box precedence::Precedence);
 220     reg.register_late_lint_pass(box eta_reduction::EtaPass);
 221     reg.register_late_lint_pass(box identity_op::IdentityOp);
 222     reg.register_early_lint_pass(box items_after_statements::ItemsAfterStatements);
 223     reg.register_late_lint_pass(box mut_mut::MutMut);
 224     reg.register_late_lint_pass(box mut_reference::UnnecessaryMutPassed);
 225     reg.register_late_lint_pass(box len_zero::LenZero);
 226     reg.register_late_lint_pass(box attrs::AttrPass);
 227     reg.register_early_lint_pass(box collapsible_if::CollapsibleIf);
 228     reg.register_late_lint_pass(box block_in_if_condition::BlockInIfCondition);
 229     reg.register_late_lint_pass(box unicode::Unicode);
 230     reg.register_late_lint_pass(box strings::StringAdd);
 231     reg.register_early_lint_pass(box returns::ReturnPass);
 232     reg.register_late_lint_pass(box methods::Pass);
 233     reg.register_late_lint_pass(box shadow::Pass);
 234     reg.register_late_lint_pass(box types::LetPass);
 235     reg.register_late_lint_pass(box types::UnitCmp);
 236     reg.register_late_lint_pass(box loops::Pass);
 237     reg.register_late_lint_pass(box lifetimes::LifetimePass);
 238     reg.register_late_lint_pass(box entry::HashMapLint);
 239     reg.register_late_lint_pass(box ranges::StepByZero);
 240     reg.register_late_lint_pass(box types::CastPass);
 241     reg.register_late_lint_pass(box types::TypeComplexityPass::new(conf.type_complexity_threshold));
 242     reg.register_late_lint_pass(box matches::MatchPass);
 243     reg.register_late_lint_pass(box minmax::MinMaxPass);
 244     reg.register_late_lint_pass(box open_options::NonSensical);
 245     reg.register_late_lint_pass(box zero_div_zero::Pass);
 246     reg.register_late_lint_pass(box mutex_atomic::MutexAtomic);
 247     reg.register_late_lint_pass(box needless_update::Pass);
 248     reg.register_late_lint_pass(box needless_borrow::NeedlessBorrow);
 249     reg.register_late_lint_pass(box no_effect::Pass);
 250     reg.register_late_lint_pass(box map_clone::Pass);
 251     reg.register_late_lint_pass(box temporary_assignment::Pass);
 252     reg.register_late_lint_pass(box transmute::Transmute);
 253     reg.register_late_lint_pass(
 254         box cyclomatic_complexity::CyclomaticComplexity::new(conf.cyclomatic_complexity_threshold)
 255     );
 256     reg.register_late_lint_pass(box escape::Pass{too_large_for_stack: conf.too_large_for_stack});
 257     reg.register_early_lint_pass(box misc_early::MiscEarly);
 258     reg.register_late_lint_pass(box array_indexing::ArrayIndexing);
 259     reg.register_late_lint_pass(box panic::Pass);
 260     reg.register_late_lint_pass(box strings::StringLitAsBytes);
 261     reg.register_late_lint_pass(box derive::Derive);
 262     reg.register_late_lint_pass(box types::CharLitAsU8);
 263     reg.register_late_lint_pass(box print::Pass);
 264     reg.register_late_lint_pass(box vec::Pass);
 265     reg.register_early_lint_pass(box non_expressive_names::NonExpressiveNames {
 266         max_single_char_names: conf.max_single_char_names,
 267     });
 268     reg.register_late_lint_pass(box drop_forget_ref::Pass);
 269     reg.register_late_lint_pass(box empty_enum::EmptyEnum);
 270     reg.register_late_lint_pass(box types::AbsurdExtremeComparisons);
 271     reg.register_late_lint_pass(box types::InvalidUpcastComparisons);
 272     reg.register_late_lint_pass(box regex::Pass::default());
 273     reg.register_late_lint_pass(box copies::CopyAndPaste);
 274     reg.register_late_lint_pass(box format::Pass);
 275     reg.register_early_lint_pass(box formatting::Formatting);
 276     reg.register_late_lint_pass(box swap::Swap);
 277     reg.register_early_lint_pass(box if_not_else::IfNotElse);
 278     reg.register_late_lint_pass(box overflow_check_conditional::OverflowCheckConditional);
 279     reg.register_late_lint_pass(box unused_label::UnusedLabel);
 280     reg.register_late_lint_pass(box new_without_default::NewWithoutDefault);
 281     reg.register_late_lint_pass(box blacklisted_name::BlackListedName::new(conf.blacklisted_names));
 282     reg.register_late_lint_pass(box functions::Functions::new(conf.too_many_arguments_threshold));
 283     reg.register_early_lint_pass(box doc::Doc::new(conf.doc_valid_idents));
 284     reg.register_late_lint_pass(box neg_multiply::NegMultiply);
 285     reg.register_early_lint_pass(box unsafe_removed_from_name::UnsafeNameRemoval);
 286     reg.register_late_lint_pass(box mem_forget::MemForget);
 287     reg.register_late_lint_pass(box arithmetic::Arithmetic::default());
 288     reg.register_late_lint_pass(box assign_ops::AssignOps);
 289     reg.register_late_lint_pass(box let_if_seq::LetIfSeq);
 290     reg.register_late_lint_pass(box eval_order_dependence::EvalOrderDependence);
 291     reg.register_late_lint_pass(box missing_doc::MissingDoc::new());
 292     reg.register_late_lint_pass(box ok_if_let::Pass);
 293     reg.register_late_lint_pass(box if_let_redundant_pattern_matching::Pass);
 294     reg.register_late_lint_pass(box partialeq_ne_impl::Pass);
 295     reg.register_early_lint_pass(box reference::Pass);
 296     reg.register_early_lint_pass(box double_parens::DoubleParens);
 297     reg.register_late_lint_pass(box unused_io_amount::UnusedIoAmount);
 298     reg.register_late_lint_pass(box large_enum_variant::LargeEnumVariant::new(conf.enum_variant_size_threshold));
 299
 300     reg.register_lint_group("clippy_restrictions", vec![
 301         arithmetic::FLOAT_ARITHMETIC,
 302         arithmetic::INTEGER_ARITHMETIC,
 303         array_indexing::INDEXING_SLICING,
 304         assign_ops::ASSIGN_OPS,
 305     ]);
 306
 307     reg.register_lint_group("clippy_pedantic", vec![
 308         booleans::NONMINIMAL_BOOL,
 309         empty_enum::EMPTY_ENUM,
 310         enum_glob_use::ENUM_GLOB_USE,
 311         enum_variants::PUB_ENUM_VARIANT_NAMES,
 312         enum_variants::STUTTER,
 313         if_not_else::IF_NOT_ELSE,
 314         items_after_statements::ITEMS_AFTER_STATEMENTS,
 315         matches::SINGLE_MATCH_ELSE,
 316         mem_forget::MEM_FORGET,
 317         methods::FILTER_MAP,
 318         methods::OPTION_MAP_UNWRAP_OR,
 319         methods::OPTION_MAP_UNWRAP_OR_ELSE,
 320         methods::OPTION_UNWRAP_USED,
 321         methods::RESULT_UNWRAP_USED,
 322         methods::WRONG_PUB_SELF_CONVENTION,
 323         misc::USED_UNDERSCORE_BINDING,
 324         misc_early::UNSEPARATED_LITERAL_SUFFIX,
 325         missing_doc::MISSING_DOCS_IN_PRIVATE_ITEMS,
 326         mut_mut::MUT_MUT,
 327         mutex_atomic::MUTEX_INTEGER,
 328         non_expressive_names::SIMILAR_NAMES,
 329         print::PRINT_STDOUT,
 330         print::USE_DEBUG,
 331         shadow::SHADOW_REUSE,
 332         shadow::SHADOW_SAME,
 333         shadow::SHADOW_UNRELATED,
 334         strings::STRING_ADD,
 335         strings::STRING_ADD_ASSIGN,
 336         types::CAST_POSSIBLE_TRUNCATION,
 337         types::CAST_POSSIBLE_WRAP,
 338         types::CAST_PRECISION_LOSS,
 339         types::CAST_SIGN_LOSS,
 340         types::INVALID_UPCAST_COMPARISONS,
 341         unicode::NON_ASCII_LITERAL,
 342         unicode::UNICODE_NOT_NFC,
 343     ]);
 344
 345     reg.register_lint_group("clippy_internal", vec![
 346         utils::internal_lints::CLIPPY_LINTS_INTERNAL,
 347         utils::internal_lints::LINT_WITHOUT_LINT_PASS,
 348     ]);
 349
 350     reg.register_lint_group("clippy", vec![
 351         approx_const::APPROX_CONSTANT,
 352         array_indexing::OUT_OF_BOUNDS_INDEXING,
 353         assign_ops::ASSIGN_OP_PATTERN,
 354         assign_ops::MISREFACTORED_ASSIGN_OP,
 355         attrs::DEPRECATED_SEMVER,
 356         attrs::INLINE_ALWAYS,
 357         attrs::USELESS_ATTRIBUTE,
 358         bit_mask::BAD_BIT_MASK,
 359         bit_mask::INEFFECTIVE_BIT_MASK,
 360         blacklisted_name::BLACKLISTED_NAME,
 361         block_in_if_condition::BLOCK_IN_IF_CONDITION_EXPR,
 362         block_in_if_condition::BLOCK_IN_IF_CONDITION_STMT,
 363         booleans::LOGIC_BUG,
 364         collapsible_if::COLLAPSIBLE_IF,
 365         copies::IF_SAME_THEN_ELSE,
 366         copies::IFS_SAME_COND,
 367         copies::MATCH_SAME_ARMS,
 368         cyclomatic_complexity::CYCLOMATIC_COMPLEXITY,
 369         derive::DERIVE_HASH_XOR_EQ,
 370         derive::EXPL_IMPL_CLONE_ON_COPY,
 371         doc::DOC_MARKDOWN,
 372         double_parens::DOUBLE_PARENS,
 373         drop_forget_ref::DROP_REF,
 374         drop_forget_ref::FORGET_REF,
 375         entry::MAP_ENTRY,
 376         enum_clike::ENUM_CLIKE_UNPORTABLE_VARIANT,
 377         enum_variants::ENUM_VARIANT_NAMES,
 378         enum_variants::MODULE_INCEPTION,
 379         eq_op::EQ_OP,
 380         escape::BOXED_LOCAL,
 381         eta_reduction::REDUNDANT_CLOSURE,
 382         eval_order_dependence::DIVERGING_SUB_EXPRESSION,
 383         eval_order_dependence::EVAL_ORDER_DEPENDENCE,
 384         format::USELESS_FORMAT,
 385         formatting::POSSIBLE_MISSING_COMMA,
 386         formatting::SUSPICIOUS_ASSIGNMENT_FORMATTING,
 387         formatting::SUSPICIOUS_ELSE_FORMATTING,
 388         functions::NOT_UNSAFE_PTR_ARG_DEREF,
 389         functions::TOO_MANY_ARGUMENTS,
 390         identity_op::IDENTITY_OP,
 391         if_let_redundant_pattern_matching::IF_LET_REDUNDANT_PATTERN_MATCHING,
 392         large_enum_variant::LARGE_ENUM_VARIANT,
 393         len_zero::LEN_WITHOUT_IS_EMPTY,
 394         len_zero::LEN_ZERO,
 395         let_if_seq::USELESS_LET_IF_SEQ,
 396         lifetimes::NEEDLESS_LIFETIMES,
 397         lifetimes::UNUSED_LIFETIMES,
 398         loops::EMPTY_LOOP,
 399         loops::EXPLICIT_COUNTER_LOOP,
 400         loops::EXPLICIT_INTO_ITER_LOOP,
 401         loops::EXPLICIT_ITER_LOOP,
 402         loops::FOR_KV_MAP,
 403         loops::FOR_LOOP_OVER_OPTION,
 404         loops::FOR_LOOP_OVER_RESULT,
 405         loops::ITER_NEXT_LOOP,
 406         loops::NEEDLESS_RANGE_LOOP,
 407         loops::REVERSE_RANGE_LOOP,
 408         loops::UNUSED_COLLECT,
 409         loops::WHILE_LET_LOOP,
 410         loops::WHILE_LET_ON_ITERATOR,
 411         map_clone::MAP_CLONE,
 412         matches::MATCH_BOOL,
 413         matches::MATCH_OVERLAPPING_ARM,
 414         matches::MATCH_REF_PATS,
 415         matches::MATCH_WILD_ERR_ARM,
 416         matches::SINGLE_MATCH,
 417         methods::CHARS_NEXT_CMP,
 418         methods::CLONE_DOUBLE_REF,
 419         methods::CLONE_ON_COPY,
 420         methods::FILTER_NEXT,
 421         methods::GET_UNWRAP,
 422         methods::ITER_NTH,
 423         methods::ITER_SKIP_NEXT,
 424         methods::NEW_RET_NO_SELF,
 425         methods::OK_EXPECT,
 426         methods::OR_FUN_CALL,
 427         methods::SEARCH_IS_SOME,
 428         methods::SHOULD_IMPLEMENT_TRAIT,
 429         methods::SINGLE_CHAR_PATTERN,
 430         methods::STRING_EXTEND_CHARS,
 431         methods::TEMPORARY_CSTRING_AS_PTR,
 432         methods::WRONG_SELF_CONVENTION,
 433         minmax::MIN_MAX,
 434         misc::CMP_NAN,
 435         misc::CMP_OWNED,
 436         misc::FLOAT_CMP,
 437         misc::MODULO_ONE,
 438         misc::REDUNDANT_PATTERN,
 439         misc::SHORT_CIRCUIT_STATEMENT,
 440         misc::TOPLEVEL_REF_ARG,
 441         misc_early::BUILTIN_TYPE_SHADOW,
 442         misc_early::DOUBLE_NEG,
 443         misc_early::DUPLICATE_UNDERSCORE_ARGUMENT,
 444         misc_early::MIXED_CASE_HEX_LITERALS,
 445         misc_early::REDUNDANT_CLOSURE_CALL,
 446         misc_early::UNNEEDED_FIELD_PATTERN,
 447         misc_early::ZERO_PREFIXED_LITERAL,
 448         mut_reference::UNNECESSARY_MUT_PASSED,
 449         mutex_atomic::MUTEX_ATOMIC,
 450         needless_bool::BOOL_COMPARISON,
 451         needless_bool::NEEDLESS_BOOL,
 452         needless_borrow::NEEDLESS_BORROW,
 453         needless_update::NEEDLESS_UPDATE,
 454         neg_multiply::NEG_MULTIPLY,
 455         new_without_default::NEW_WITHOUT_DEFAULT,
 456         new_without_default::NEW_WITHOUT_DEFAULT_DERIVE,
 457         no_effect::NO_EFFECT,
 458         no_effect::UNNECESSARY_OPERATION,
 459         non_expressive_names::MANY_SINGLE_CHAR_NAMES,
 460         ok_if_let::IF_LET_SOME_RESULT,
 461         open_options::NONSENSICAL_OPEN_OPTIONS,
 462         overflow_check_conditional::OVERFLOW_CHECK_CONDITIONAL,
 463         panic::PANIC_PARAMS,
 464         partialeq_ne_impl::PARTIALEQ_NE_IMPL,
 465         precedence::PRECEDENCE,
 466         print::PRINT_WITH_NEWLINE,
 467         ptr::CMP_NULL,
 468         ptr::PTR_ARG,
 469         ranges::RANGE_STEP_BY_ZERO,
 470         ranges::RANGE_ZIP_WITH_LEN,
 471         reference::DEREF_ADDROF,
 472         regex::INVALID_REGEX,
 473         regex::REGEX_MACRO,
 474         regex::TRIVIAL_REGEX,
 475         returns::LET_AND_RETURN,
 476         returns::NEEDLESS_RETURN,
 477         serde::SERDE_API_MISUSE,
 478         strings::STRING_LIT_AS_BYTES,
 479         swap::ALMOST_SWAPPED,
 480         swap::MANUAL_SWAP,
 481         temporary_assignment::TEMPORARY_ASSIGNMENT,
 482         transmute::CROSSPOINTER_TRANSMUTE,
 483         transmute::TRANSMUTE_PTR_TO_REF,
 484         transmute::USELESS_TRANSMUTE,
 485         transmute::WRONG_TRANSMUTE,
 486         types::ABSURD_EXTREME_COMPARISONS,
 487         types::BOX_VEC,
 488         types::CHAR_LIT_AS_U8,
 489         types::LET_UNIT_VALUE,
 490         types::LINKEDLIST,
 491         types::TYPE_COMPLEXITY,
 492         types::UNIT_CMP,
 493         unicode::ZERO_WIDTH_SPACE,
 494         unsafe_removed_from_name::UNSAFE_REMOVED_FROM_NAME,
 495         unused_io_amount::UNUSED_IO_AMOUNT,
 496         unused_label::UNUSED_LABEL,
 497         vec::USELESS_VEC,
 498         zero_div_zero::ZERO_DIVIDED_BY_ZERO,
 499     ]);
 500 }
 501
 502 // only exists to let the dogfood integration test works.
 503 // Don't run clippy as an executable directly
 504 #[allow(dead_code, print_stdout)]
 505 fn main() {
 506     panic!("Please use the cargo-clippy executable");
 507 }