## Lint Configuration Options |
Option
| Default Value | |--|--| | [arithmetic-side-effects-allowed](#arithmetic-side-effects-allowed) | `{}` | | [arithmetic-side-effects-allowed-binary](#arithmetic-side-effects-allowed-binary) | `[]` | | [arithmetic-side-effects-allowed-unary](#arithmetic-side-effects-allowed-unary) | `{}` | | [avoid-breaking-exported-api](#avoid-breaking-exported-api) | `true` | | [msrv](#msrv) | `None` | | [cognitive-complexity-threshold](#cognitive-complexity-threshold) | `25` | | [disallowed-names](#disallowed-names) | `["foo", "baz", "quux"]` | | [doc-valid-idents](#doc-valid-idents) | `["KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "DirectX", "ECMAScript", "GPLv2", "GPLv3", "GitHub", "GitLab", "IPv4", "IPv6", "ClojureScript", "CoffeeScript", "JavaScript", "PureScript", "TypeScript", "NaN", "NaNs", "OAuth", "GraphQL", "OCaml", "OpenGL", "OpenMP", "OpenSSH", "OpenSSL", "OpenStreetMap", "OpenDNS", "WebGL", "TensorFlow", "TrueType", "iOS", "macOS", "FreeBSD", "TeX", "LaTeX", "BibTeX", "BibLaTeX", "MinGW", "CamelCase"]` | | [too-many-arguments-threshold](#too-many-arguments-threshold) | `7` | | [type-complexity-threshold](#type-complexity-threshold) | `250` | | [single-char-binding-names-threshold](#single-char-binding-names-threshold) | `4` | | [too-large-for-stack](#too-large-for-stack) | `200` | | [enum-variant-name-threshold](#enum-variant-name-threshold) | `3` | | [enum-variant-size-threshold](#enum-variant-size-threshold) | `200` | | [verbose-bit-mask-threshold](#verbose-bit-mask-threshold) | `1` | | [literal-representation-threshold](#literal-representation-threshold) | `16384` | | [trivial-copy-size-limit](#trivial-copy-size-limit) | `None` | | [pass-by-value-size-limit](#pass-by-value-size-limit) | `256` | | [too-many-lines-threshold](#too-many-lines-threshold) | `100` | | [array-size-threshold](#array-size-threshold) | `512000` | | [vec-box-size-threshold](#vec-box-size-threshold) | `4096` | | [max-trait-bounds](#max-trait-bounds) | `3` | | [max-struct-bools](#max-struct-bools) | `3` | | [max-fn-params-bools](#max-fn-params-bools) | `3` | | [warn-on-all-wildcard-imports](#warn-on-all-wildcard-imports) | `false` | | [disallowed-macros](#disallowed-macros) | `[]` | | [disallowed-methods](#disallowed-methods) | `[]` | | [disallowed-types](#disallowed-types) | `[]` | | [unreadable-literal-lint-fractions](#unreadable-literal-lint-fractions) | `true` | | [upper-case-acronyms-aggressive](#upper-case-acronyms-aggressive) | `false` | | [matches-for-let-else](#matches-for-let-else) | `WellKnownTypes` | | [cargo-ignore-publish](#cargo-ignore-publish) | `false` | | [standard-macro-braces](#standard-macro-braces) | `[]` | | [enforced-import-renames](#enforced-import-renames) | `[]` | | [allowed-scripts](#allowed-scripts) | `["Latin"]` | | [enable-raw-pointer-heuristic-for-send](#enable-raw-pointer-heuristic-for-send) | `true` | | [max-suggested-slice-pattern-length](#max-suggested-slice-pattern-length) | `3` | | [await-holding-invalid-types](#await-holding-invalid-types) | `[]` | | [max-include-file-size](#max-include-file-size) | `1000000` | | [allow-expect-in-tests](#allow-expect-in-tests) | `false` | | [allow-unwrap-in-tests](#allow-unwrap-in-tests) | `false` | | [allow-dbg-in-tests](#allow-dbg-in-tests) | `false` | | [allow-print-in-tests](#allow-print-in-tests) | `false` | | [large-error-threshold](#large-error-threshold) | `128` | | [ignore-interior-mutability](#ignore-interior-mutability) | `["bytes::Bytes"]` | | [allow-mixed-uninlined-format-args](#allow-mixed-uninlined-format-args) | `true` | | [suppress-restriction-lint-in-const](#suppress-restriction-lint-in-const) | `false` | ### arithmetic-side-effects-allowed Suppress checking of the passed type names in all types of operations. If a specific operation is desired, consider using `arithmetic_side_effects_allowed_binary` or `arithmetic_side_effects_allowed_unary` instead. #### Example ```toml arithmetic-side-effects-allowed = ["SomeType", "AnotherType"] ``` #### Noteworthy A type, say `SomeType`, listed in this configuration has the same behavior of `["SomeType" , "*"], ["*", "SomeType"]` in `arithmetic_side_effects_allowed_binary`. **Default Value:** `{}` (`rustc_data_structures::fx::FxHashSet`) * [arithmetic_side_effects](https://rust-lang.github.io/rust-clippy/master/index.html#arithmetic_side_effects) ### arithmetic-side-effects-allowed-binary Suppress checking of the passed type pair names in binary operations like addition or multiplication. Supports the "*" wildcard to indicate that a certain type won't trigger the lint regardless of the involved counterpart. For example, `["SomeType", "*"]` or `["*", "AnotherType"]`. Pairs are asymmetric, which means that `["SomeType", "AnotherType"]` is not the same as `["AnotherType", "SomeType"]`. #### Example ```toml arithmetic-side-effects-allowed-binary = [["SomeType" , "f32"], ["AnotherType", "*"]] ``` **Default Value:** `[]` (`Vec<[String; 2]>`) * [arithmetic_side_effects](https://rust-lang.github.io/rust-clippy/master/index.html#arithmetic_side_effects) ### arithmetic-side-effects-allowed-unary Suppress checking of the passed type names in unary operations like "negation" (`-`). #### Example ```toml arithmetic-side-effects-allowed-unary = ["SomeType", "AnotherType"] ``` **Default Value:** `{}` (`rustc_data_structures::fx::FxHashSet`) * [arithmetic_side_effects](https://rust-lang.github.io/rust-clippy/master/index.html#arithmetic_side_effects) ### avoid-breaking-exported-api Suppress lints whenever the suggested change would cause breakage for other crates. **Default Value:** `true` (`bool`) * [enum_variant_names](https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names) * [large_types_passed_by_value](https://rust-lang.github.io/rust-clippy/master/index.html#large_types_passed_by_value) * [trivially_copy_pass_by_ref](https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref) * [unnecessary_wraps](https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_wraps) * [unused_self](https://rust-lang.github.io/rust-clippy/master/index.html#unused_self) * [upper_case_acronyms](https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms) * [wrong_self_convention](https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention) * [box_collection](https://rust-lang.github.io/rust-clippy/master/index.html#box_collection) * [redundant_allocation](https://rust-lang.github.io/rust-clippy/master/index.html#redundant_allocation) * [rc_buffer](https://rust-lang.github.io/rust-clippy/master/index.html#rc_buffer) * [vec_box](https://rust-lang.github.io/rust-clippy/master/index.html#vec_box) * [option_option](https://rust-lang.github.io/rust-clippy/master/index.html#option_option) * [linkedlist](https://rust-lang.github.io/rust-clippy/master/index.html#linkedlist) * [rc_mutex](https://rust-lang.github.io/rust-clippy/master/index.html#rc_mutex) ### msrv The minimum rust version that the project supports **Default Value:** `None` (`Option`) * [manual_split_once](https://rust-lang.github.io/rust-clippy/master/index.html#manual_split_once) * [manual_str_repeat](https://rust-lang.github.io/rust-clippy/master/index.html#manual_str_repeat) * [cloned_instead_of_copied](https://rust-lang.github.io/rust-clippy/master/index.html#cloned_instead_of_copied) * [redundant_field_names](https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names) * [redundant_static_lifetimes](https://rust-lang.github.io/rust-clippy/master/index.html#redundant_static_lifetimes) * [filter_map_next](https://rust-lang.github.io/rust-clippy/master/index.html#filter_map_next) * [checked_conversions](https://rust-lang.github.io/rust-clippy/master/index.html#checked_conversions) * [manual_range_contains](https://rust-lang.github.io/rust-clippy/master/index.html#manual_range_contains) * [use_self](https://rust-lang.github.io/rust-clippy/master/index.html#use_self) * [mem_replace_with_default](https://rust-lang.github.io/rust-clippy/master/index.html#mem_replace_with_default) * [manual_non_exhaustive](https://rust-lang.github.io/rust-clippy/master/index.html#manual_non_exhaustive) * [option_as_ref_deref](https://rust-lang.github.io/rust-clippy/master/index.html#option_as_ref_deref) * [map_unwrap_or](https://rust-lang.github.io/rust-clippy/master/index.html#map_unwrap_or) * [match_like_matches_macro](https://rust-lang.github.io/rust-clippy/master/index.html#match_like_matches_macro) * [manual_strip](https://rust-lang.github.io/rust-clippy/master/index.html#manual_strip) * [missing_const_for_fn](https://rust-lang.github.io/rust-clippy/master/index.html#missing_const_for_fn) * [unnested_or_patterns](https://rust-lang.github.io/rust-clippy/master/index.html#unnested_or_patterns) * [from_over_into](https://rust-lang.github.io/rust-clippy/master/index.html#from_over_into) * [ptr_as_ptr](https://rust-lang.github.io/rust-clippy/master/index.html#ptr_as_ptr) * [if_then_some_else_none](https://rust-lang.github.io/rust-clippy/master/index.html#if_then_some_else_none) * [approx_constant](https://rust-lang.github.io/rust-clippy/master/index.html#approx_constant) * [deprecated_cfg_attr](https://rust-lang.github.io/rust-clippy/master/index.html#deprecated_cfg_attr) * [index_refutable_slice](https://rust-lang.github.io/rust-clippy/master/index.html#index_refutable_slice) * [map_clone](https://rust-lang.github.io/rust-clippy/master/index.html#map_clone) * [borrow_as_ptr](https://rust-lang.github.io/rust-clippy/master/index.html#borrow_as_ptr) * [manual_bits](https://rust-lang.github.io/rust-clippy/master/index.html#manual_bits) * [err_expect](https://rust-lang.github.io/rust-clippy/master/index.html#err_expect) * [cast_abs_to_unsigned](https://rust-lang.github.io/rust-clippy/master/index.html#cast_abs_to_unsigned) * [uninlined_format_args](https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args) * [manual_clamp](https://rust-lang.github.io/rust-clippy/master/index.html#manual_clamp) * [manual_let_else](https://rust-lang.github.io/rust-clippy/master/index.html#manual_let_else) * [unchecked_duration_subtraction](https://rust-lang.github.io/rust-clippy/master/index.html#unchecked_duration_subtraction) * [collapsible_str_replace](https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_str_replace) * [seek_from_current](https://rust-lang.github.io/rust-clippy/master/index.html#seek_from_current) * [seek_rewind](https://rust-lang.github.io/rust-clippy/master/index.html#seek_rewind) * [unnecessary_lazy_evaluations](https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_lazy_evaluations) * [transmute_ptr_to_ref](https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ref) * [almost_complete_range](https://rust-lang.github.io/rust-clippy/master/index.html#almost_complete_range) * [needless_borrow](https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow) * [derivable_impls](https://rust-lang.github.io/rust-clippy/master/index.html#derivable_impls) ### cognitive-complexity-threshold The maximum cognitive complexity a function can have **Default Value:** `25` (`u64`) * [cognitive_complexity](https://rust-lang.github.io/rust-clippy/master/index.html#cognitive_complexity) ### disallowed-names The list of disallowed names to lint about. NB: `bar` is not here since it has legitimate uses. The value `".."` can be used as part of the list to indicate, that the configured values should be appended to the default configuration of Clippy. By default any configuration will replace the default value. **Default Value:** `["foo", "baz", "quux"]` (`Vec`) * [disallowed_names](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_names) ### doc-valid-idents The list of words this lint should not consider as identifiers needing ticks. The value `".."` can be used as part of the list to indicate, that the configured values should be appended to the default configuration of Clippy. By default any configuraction will replace the default value. For example: * `doc-valid-idents = ["ClipPy"]` would replace the default list with `["ClipPy"]`. * `doc-valid-idents = ["ClipPy", ".."]` would append `ClipPy` to the default list. Default list: **Default Value:** `["KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "DirectX", "ECMAScript", "GPLv2", "GPLv3", "GitHub", "GitLab", "IPv4", "IPv6", "ClojureScript", "CoffeeScript", "JavaScript", "PureScript", "TypeScript", "NaN", "NaNs", "OAuth", "GraphQL", "OCaml", "OpenGL", "OpenMP", "OpenSSH", "OpenSSL", "OpenStreetMap", "OpenDNS", "WebGL", "TensorFlow", "TrueType", "iOS", "macOS", "FreeBSD", "TeX", "LaTeX", "BibTeX", "BibLaTeX", "MinGW", "CamelCase"]` (`Vec`) * [doc_markdown](https://rust-lang.github.io/rust-clippy/master/index.html#doc_markdown) ### too-many-arguments-threshold The maximum number of argument a function or method can have **Default Value:** `7` (`u64`) * [too_many_arguments](https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments) ### type-complexity-threshold The maximum complexity a type can have **Default Value:** `250` (`u64`) * [type_complexity](https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity) ### single-char-binding-names-threshold The maximum number of single char bindings a scope may have **Default Value:** `4` (`u64`) * [many_single_char_names](https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names) ### too-large-for-stack The maximum size of objects (in bytes) that will be linted. Larger objects are ok on the heap **Default Value:** `200` (`u64`) * [boxed_local](https://rust-lang.github.io/rust-clippy/master/index.html#boxed_local) * [useless_vec](https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec) ### enum-variant-name-threshold The minimum number of enum variants for the lints about variant names to trigger **Default Value:** `3` (`u64`) * [enum_variant_names](https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names) ### enum-variant-size-threshold The maximum size of an enum's variant to avoid box suggestion **Default Value:** `200` (`u64`) * [large_enum_variant](https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant) ### verbose-bit-mask-threshold The maximum allowed size of a bit mask before suggesting to use 'trailing_zeros' **Default Value:** `1` (`u64`) * [verbose_bit_mask](https://rust-lang.github.io/rust-clippy/master/index.html#verbose_bit_mask) ### literal-representation-threshold The lower bound for linting decimal literals **Default Value:** `16384` (`u64`) * [decimal_literal_representation](https://rust-lang.github.io/rust-clippy/master/index.html#decimal_literal_representation) ### trivial-copy-size-limit The maximum size (in bytes) to consider a `Copy` type for passing by value instead of by reference. **Default Value:** `None` (`Option`) * [trivially_copy_pass_by_ref](https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref) ### pass-by-value-size-limit The minimum size (in bytes) to consider a type for passing by reference instead of by value. **Default Value:** `256` (`u64`) * [large_type_pass_by_move](https://rust-lang.github.io/rust-clippy/master/index.html#large_type_pass_by_move) ### too-many-lines-threshold The maximum number of lines a function or method can have **Default Value:** `100` (`u64`) * [too_many_lines](https://rust-lang.github.io/rust-clippy/master/index.html#too_many_lines) ### array-size-threshold The maximum allowed size for arrays on the stack **Default Value:** `512000` (`u128`) * [large_stack_arrays](https://rust-lang.github.io/rust-clippy/master/index.html#large_stack_arrays) * [large_const_arrays](https://rust-lang.github.io/rust-clippy/master/index.html#large_const_arrays) ### vec-box-size-threshold The size of the boxed type in bytes, where boxing in a `Vec` is allowed **Default Value:** `4096` (`u64`) * [vec_box](https://rust-lang.github.io/rust-clippy/master/index.html#vec_box) ### max-trait-bounds The maximum number of bounds a trait can have to be linted **Default Value:** `3` (`u64`) * [type_repetition_in_bounds](https://rust-lang.github.io/rust-clippy/master/index.html#type_repetition_in_bounds) ### max-struct-bools The maximum number of bool fields a struct can have **Default Value:** `3` (`u64`) * [struct_excessive_bools](https://rust-lang.github.io/rust-clippy/master/index.html#struct_excessive_bools) ### max-fn-params-bools The maximum number of bool parameters a function can have **Default Value:** `3` (`u64`) * [fn_params_excessive_bools](https://rust-lang.github.io/rust-clippy/master/index.html#fn_params_excessive_bools) ### warn-on-all-wildcard-imports Whether to allow certain wildcard imports (prelude, super in tests). **Default Value:** `false` (`bool`) * [wildcard_imports](https://rust-lang.github.io/rust-clippy/master/index.html#wildcard_imports) ### disallowed-macros The list of disallowed macros, written as fully qualified paths. **Default Value:** `[]` (`Vec`) * [disallowed_macros](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_macros) ### disallowed-methods The list of disallowed methods, written as fully qualified paths. **Default Value:** `[]` (`Vec`) * [disallowed_methods](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_methods) ### disallowed-types The list of disallowed types, written as fully qualified paths. **Default Value:** `[]` (`Vec`) * [disallowed_types](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_types) ### unreadable-literal-lint-fractions Should the fraction of a decimal be linted to include separators. **Default Value:** `true` (`bool`) * [unreadable_literal](https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal) ### upper-case-acronyms-aggressive Enables verbose mode. Triggers if there is more than one uppercase char next to each other **Default Value:** `false` (`bool`) * [upper_case_acronyms](https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms) ### matches-for-let-else Whether the matches should be considered by the lint, and whether there should be filtering for common types. **Default Value:** `WellKnownTypes` (`crate::manual_let_else::MatchLintBehaviour`) * [manual_let_else](https://rust-lang.github.io/rust-clippy/master/index.html#manual_let_else) ### cargo-ignore-publish For internal testing only, ignores the current `publish` settings in the Cargo manifest. **Default Value:** `false` (`bool`) * [_cargo_common_metadata](https://rust-lang.github.io/rust-clippy/master/index.html#_cargo_common_metadata) ### standard-macro-braces Enforce the named macros always use the braces specified. A `MacroMatcher` can be added like so `{ name = "macro_name", brace = "(" }`. If the macro is could be used with a full path two `MacroMatcher`s have to be added one with the full path `crate_name::macro_name` and one with just the macro name. **Default Value:** `[]` (`Vec`) * [nonstandard_macro_braces](https://rust-lang.github.io/rust-clippy/master/index.html#nonstandard_macro_braces) ### enforced-import-renames The list of imports to always rename, a fully qualified path followed by the rename. **Default Value:** `[]` (`Vec`) * [missing_enforced_import_renames](https://rust-lang.github.io/rust-clippy/master/index.html#missing_enforced_import_renames) ### allowed-scripts The list of unicode scripts allowed to be used in the scope. **Default Value:** `["Latin"]` (`Vec`) * [disallowed_script_idents](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_script_idents) ### enable-raw-pointer-heuristic-for-send Whether to apply the raw pointer heuristic to determine if a type is `Send`. **Default Value:** `true` (`bool`) * [non_send_fields_in_send_ty](https://rust-lang.github.io/rust-clippy/master/index.html#non_send_fields_in_send_ty) ### max-suggested-slice-pattern-length When Clippy suggests using a slice pattern, this is the maximum number of elements allowed in the slice pattern that is suggested. If more elements would be necessary, the lint is suppressed. For example, `[_, _, _, e, ..]` is a slice pattern with 4 elements. **Default Value:** `3` (`u64`) * [index_refutable_slice](https://rust-lang.github.io/rust-clippy/master/index.html#index_refutable_slice) ### await-holding-invalid-types **Default Value:** `[]` (`Vec`) * [await_holding_invalid_type](https://rust-lang.github.io/rust-clippy/master/index.html#await_holding_invalid_type) ### max-include-file-size The maximum size of a file included via `include_bytes!()` or `include_str!()`, in bytes **Default Value:** `1000000` (`u64`) * [large_include_file](https://rust-lang.github.io/rust-clippy/master/index.html#large_include_file) ### allow-expect-in-tests Whether `expect` should be allowed within `#[cfg(test)]` **Default Value:** `false` (`bool`) * [expect_used](https://rust-lang.github.io/rust-clippy/master/index.html#expect_used) ### allow-unwrap-in-tests Whether `unwrap` should be allowed in test cfg **Default Value:** `false` (`bool`) * [unwrap_used](https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_used) ### allow-dbg-in-tests Whether `dbg!` should be allowed in test functions **Default Value:** `false` (`bool`) * [dbg_macro](https://rust-lang.github.io/rust-clippy/master/index.html#dbg_macro) ### allow-print-in-tests Whether print macros (ex. `println!`) should be allowed in test functions **Default Value:** `false` (`bool`) * [print_stdout](https://rust-lang.github.io/rust-clippy/master/index.html#print_stdout) * [print_stderr](https://rust-lang.github.io/rust-clippy/master/index.html#print_stderr) ### large-error-threshold The maximum size of the `Err`-variant in a `Result` returned from a function **Default Value:** `128` (`u64`) * [result_large_err](https://rust-lang.github.io/rust-clippy/master/index.html#result_large_err) ### ignore-interior-mutability A list of paths to types that should be treated like `Arc`, i.e. ignored but for the generic parameters for determining interior mutability **Default Value:** `["bytes::Bytes"]` (`Vec`) * [mutable_key](https://rust-lang.github.io/rust-clippy/master/index.html#mutable_key) ### allow-mixed-uninlined-format-args Whether to allow mixed uninlined format args, e.g. `format!("{} {}", a, foo.bar)` **Default Value:** `true` (`bool`) * [uninlined_format_args](https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args) ### suppress-restriction-lint-in-const In same cases the restructured operation might not be unavoidable, as the suggested counterparts are unavailable in constant code. This configuration will cause restriction lints to trigger even if no suggestion can be made. **Default Value:** `false` (`bool`) * [indexing_slicing](https://rust-lang.github.io/rust-clippy/master/index.html#indexing_slicing)