| |
| Available lint options: |
| -W <foo> Warn about <foo> |
| -A <foo> Allow <foo> |
| -D <foo> Deny <foo> |
| -F <foo> Forbid <foo> (deny <foo> and all attempts to override) |
| |
| |
| Lint checks provided by rustc: |
| |
| name default meaning |
| ---- ------- ------- |
| absolute-paths-not-starting-with-crate allow fully qualified paths that start with a module name instead of `crate`, `self`, or an extern crate name |
| anonymous-parameters allow detects anonymous parameters |
| box-pointers allow use of owned (Box type) heap memory |
| deprecated-in-future allow detects use of items that will be deprecated in a future version |
| elided-lifetimes-in-paths allow hidden lifetime parameters in types are deprecated |
| explicit-outlives-requirements allow outlives requirements can be inferred |
| indirect-structural-match allow pattern with const indirectly referencing non-structural-match type |
| keyword-idents allow detects edition keywords being used as an identifier |
| macro-use-extern-crate allow the `#[macro_use]` attribute is now deprecated in favor of using macros via the module system |
| meta-variable-misuse allow possible meta-variable misuse at macro definition |
| missing-copy-implementations allow detects potentially-forgotten implementations of `Copy` |
| missing-crate-level-docs allow detects crates with no crate-level documentation |
| missing-debug-implementations allow detects missing implementations of Debug |
| missing-docs allow detects missing documentation for public members |
| missing-doc-code-examples allow detects publicly-exported items without code samples in their documentation |
| non-ascii-idents allow detects non-ASCII identifiers |
| private-doc-tests allow detects code samples in docs of private items not documented by rustdoc |
| single-use-lifetimes allow detects lifetime parameters that are only used once |
| trivial-casts allow detects trivial casts which could be removed |
| trivial-numeric-casts allow detects trivial casts of numeric types which could be removed |
| unaligned-references allow detects unaligned references to fields of packed structs |
| unreachable-pub allow `pub` items not reachable from crate root |
| unsafe-code allow usage of `unsafe` code |
| unsafe-op-in-unsafe-fn allow unsafe operations in unsafe functions without an explicit unsafe block are deprecated |
| unstable-features allow enabling unstable features (deprecated. do not use) |
| unused-crate-dependencies allow crate dependencies that are never used |
| unused-extern-crates allow extern crates that are never used |
| unused-import-braces allow unnecessary braces around an imported item |
| unused-lifetimes allow detects lifetime parameters that are never used |
| unused-qualifications allow detects unnecessarily qualified names |
| unused-results allow unused result of an expression in a statement |
| variant-size-differences allow detects enums with widely varying variant sizes |
| array-into-iter warn detects calling `into_iter` on arrays |
| asm-sub-register warn using only a subset of a register for inline asm inputs |
| bare-trait-objects warn suggest using `dyn Trait` for trait objects |
| bindings-with-variant-name warn detects pattern bindings with the same name as one of the matched variants |
| cenum-impl-drop-cast warn a C-like enum implementing Drop is cast |
| clashing-extern-declarations warn detects when an extern fn has been declared with the same name but different types |
| coherence-leak-check warn distinct impls distinguished only by the leak-check code |
| confusable-idents warn detects visually confusable pairs between identifiers |
| dead-code warn detect unused, unexported items |
| deprecated warn detects use of deprecated items |
| ellipsis-inclusive-range-patterns warn `...` range patterns are deprecated |
| exported-private-dependencies warn public interface leaks type from a private dependency |
| illegal-floating-point-literal-pattern warn floating-point literals cannot be used in patterns |
| improper-ctypes warn proper use of libc types in foreign modules |
| improper-ctypes-definitions warn proper use of libc types in foreign item definitions |
| incomplete-features warn incomplete features that may function improperly in some or all cases |
| inline-no-sanitize warn detects incompatible use of `#[inline(always)]` and `#[no_sanitize(...)]` |
| intra-doc-link-resolution-failure warn failures in resolving intra-doc link targets |
| invalid-codeblock-attributes warn codeblock attribute looks a lot like a known one |
| invalid-value warn an invalid value is being created (such as a NULL reference) |
| irrefutable-let-patterns warn detects irrefutable patterns in if-let and while-let statements |
| late-bound-lifetime-arguments warn detects generic lifetime arguments in path segments with late bound lifetime parameters |
| mixed-script-confusables warn detects Unicode scripts whose mixed script confusables codepoints are solely used |
| mutable-borrow-reservation-conflict warn reservation of a two-phased borrow conflicts with other shared borrows |
| non-camel-case-types warn types, variants, traits and type parameters should have camel case names |
| non-shorthand-field-patterns warn using `Struct { x: x }` instead of `Struct { x }` in a pattern |
| non-snake-case warn variables, methods, functions, lifetime parameters and modules should have snake case names |
| non-upper-case-globals warn static constants should have uppercase identifiers |
| no-mangle-generic-items warn generic items must be mangled |
| overlapping-patterns warn detects overlapping patterns |
| path-statements warn path statements with no effect |
| private-in-public warn detect private items in public interfaces not caught by the old implementation |
| proc-macro-derive-resolution-fallback warn detects proc macro derives using inaccessible names from parent modules |
| redundant-semicolons warn detects unnecessary trailing semicolons |
| renamed-and-removed-lints warn lints that have been renamed or removed |
| safe-packed-borrows warn safe borrows of fields of packed structs were erroneously allowed |
| stable-features warn stable features found in `#[feature]` directive |
| trivial-bounds warn these bounds don't depend on an type parameters |
| type-alias-bounds warn bounds in type aliases are not enforced |
| tyvar-behind-raw-pointer warn raw pointer to an inference variable |
| uncommon-codepoints warn detects uncommon Unicode codepoints in identifiers |
| unconditional-recursion warn functions that cannot return without calling themselves |
| unknown-lints warn unrecognized lint attribute |
| unnameable-test-items warn detects an item that cannot be named being marked as `#[test_case]` |
| unreachable-code warn detects unreachable code paths |
| unreachable-patterns warn detects unreachable patterns |
| unstable-name-collisions warn detects name collision with an existing but unstable method |
| unused-allocation warn detects unnecessary allocations that can be eliminated |
| unused-assignments warn detect assignments that will never be read |
| unused-attributes warn detects attributes that were not used by the compiler |
| unused-braces warn unnecessary braces around an expression |
| unused-comparisons warn comparisons made useless by limits of the types involved |
| unused-doc-comments warn detects doc comments that aren't used by rustdoc |
| unused-features warn unused features found in crate-level `#[feature]` directives |
| unused-imports warn imports that are never used |
| unused-labels warn detects labels that are never used |
| unused-macros warn detects macros that were not used |
| unused-must-use warn unused result of a type flagged as `#[must_use]` |
| unused-mut warn detect mut variables which don't need to be mutable |
| unused-parens warn `if`, `match`, `while` and `return` do not need parentheses |
| unused-unsafe warn unnecessary use of an `unsafe` block |
| unused-variables warn detect variables which are not used in any way |
| warnings warn mass-change the level for lints which produce warnings |
| where-clauses-object-safety warn checks the object safety of where clauses |
| while-true warn suggest using `loop { }` instead of `while true { }` |
| ambiguous-associated-items deny ambiguous associated items |
| arithmetic-overflow deny arithmetic operation overflows |
| conflicting-repr-hints deny conflicts between `#[repr(..)]` hints that were previously accepted and used in practice |
| const-err deny constant evaluation detected erroneous expression |
| ill-formed-attribute-input deny ill-formed attribute inputs that were previously accepted and used in practice |
| incomplete-include deny trailing content in included file |
| invalid-type-param-default deny type parameter default erroneously allowed in invalid location |
| macro-expanded-macro-exports-accessed-by-absolute-paths deny macro-expanded `macro_export` macros from the current crate cannot be referred to by absolute paths |
| missing-fragment-specifier deny detects missing fragment specifiers in unused `macro_rules!` patterns |
| mutable-transmutes deny mutating transmuted &mut T from &T may cause undefined behavior |
| no-mangle-const-items deny const items will not have their symbols exported |
| order-dependent-trait-objects deny trait-object types were treated as different depending on marker-trait order |
| overflowing-literals deny literal out of range for its type |
| patterns-in-fns-without-body deny patterns in functions without body were erroneously allowed |
| pub-use-of-private-extern-crate deny detect public re-exports of private extern crates |
| soft-unstable deny a feature gate that doesn't break dependent crates |
| unconditional-panic deny operation will cause a panic at runtime |
| unknown-crate-types deny unknown crate type found in `#[crate_type]` directive |
| |
| |
| Lint groups provided by rustc: |
| |
| name sub-lints |
| ---- --------- |
| warnings all lints that are set to issue warnings |
| future-incompatible keyword-idents, anonymous-parameters, illegal-floating-point-literal-pattern, private-in-public, pub-use-of-private-extern-crate, invalid-type-param-default, safe-packed-borrows, patterns-in-fns-without-body, missing-fragment-specifier, late-bound-lifetime-arguments, order-dependent-trait-objects, coherence-leak-check, tyvar-behind-raw-pointer, absolute-paths-not-starting-with-crate, unstable-name-collisions, where-clauses-object-safety, proc-macro-derive-resolution-fallback, macro-expanded-macro-exports-accessed-by-absolute-paths, ill-formed-attribute-input, conflicting-repr-hints, ambiguous-associated-items, mutable-borrow-reservation-conflict, indirect-structural-match, soft-unstable, cenum-impl-drop-cast, array-into-iter |
| nonstandard-style non-camel-case-types, non-snake-case, non-upper-case-globals |
| rust-2018-compatibility keyword-idents, anonymous-parameters, tyvar-behind-raw-pointer, absolute-paths-not-starting-with-crate |
| rust-2018-idioms bare-trait-objects, unused-extern-crates, ellipsis-inclusive-range-patterns, elided-lifetimes-in-paths, explicit-outlives-requirements |
| rustdoc intra-doc-link-resolution-failure, invalid-codeblock-attributes, missing-doc-code-examples, private-doc-tests |
| unused unused-imports, unused-variables, unused-assignments, dead-code, unused-mut, unreachable-code, unreachable-patterns, overlapping-patterns, unused-must-use, unused-unsafe, path-statements, unused-attributes, unused-macros, unused-allocation, unused-doc-comments, unused-extern-crates, unused-features, unused-labels, unused-parens, unused-braces, redundant-semicolons |
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| Compiler plugins can provide additional lints and lint groups. To see a listing of these, re-run `rustc -W help` with a crate filename. |
