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https://github.com/rust-lang/rust-clippy
synced 2024-11-26 22:50:56 +00:00
ignore generics and allow arbitrary threshold
This commit is contained in:
parent
03c8db048e
commit
7cdd87ca4a
14 changed files with 270 additions and 175 deletions
|
@ -4958,6 +4958,7 @@ Released 2018-09-13
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[`mem_replace_option_with_none`]: https://rust-lang.github.io/rust-clippy/master/index.html#mem_replace_option_with_none
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[`mem_replace_with_default`]: https://rust-lang.github.io/rust-clippy/master/index.html#mem_replace_with_default
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[`mem_replace_with_uninit`]: https://rust-lang.github.io/rust-clippy/master/index.html#mem_replace_with_uninit
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[`min_ident_chars`]: https://rust-lang.github.io/rust-clippy/master/index.html#min_ident_chars
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[`min_max`]: https://rust-lang.github.io/rust-clippy/master/index.html#min_max
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[`misaligned_transmute`]: https://rust-lang.github.io/rust-clippy/master/index.html#misaligned_transmute
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[`mismatched_target_os`]: https://rust-lang.github.io/rust-clippy/master/index.html#mismatched_target_os
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@ -5155,7 +5156,6 @@ Released 2018-09-13
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[`significant_drop_tightening`]: https://rust-lang.github.io/rust-clippy/master/index.html#significant_drop_tightening
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[`similar_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#similar_names
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[`single_char_add_str`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
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[`single_char_idents`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_idents
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[`single_char_lifetime_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_lifetime_names
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[`single_char_pattern`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
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[`single_char_push_str`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_push_str
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@ -416,6 +416,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
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crate::methods::VERBOSE_FILE_READS_INFO,
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crate::methods::WRONG_SELF_CONVENTION_INFO,
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crate::methods::ZST_OFFSET_INFO,
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crate::min_ident_chars::MIN_IDENT_CHARS_INFO,
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crate::minmax::MIN_MAX_INFO,
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crate::misc::SHORT_CIRCUIT_STATEMENT_INFO,
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crate::misc::TOPLEVEL_REF_ARG_INFO,
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@ -565,7 +566,6 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
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crate::shadow::SHADOW_SAME_INFO,
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crate::shadow::SHADOW_UNRELATED_INFO,
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crate::significant_drop_tightening::SIGNIFICANT_DROP_TIGHTENING_INFO,
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crate::single_char_idents::SINGLE_CHAR_IDENTS_INFO,
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crate::single_char_lifetime_names::SINGLE_CHAR_LIFETIME_NAMES_INFO,
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crate::single_component_path_imports::SINGLE_COMPONENT_PATH_IMPORTS_INFO,
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crate::size_of_in_element_count::SIZE_OF_IN_ELEMENT_COUNT_INFO,
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@ -197,6 +197,7 @@ mod matches;
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mod mem_forget;
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mod mem_replace;
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mod methods;
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mod min_ident_chars;
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mod minmax;
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mod misc;
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mod misc_early;
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@ -284,7 +285,6 @@ mod semicolon_if_nothing_returned;
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mod serde_api;
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mod shadow;
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mod significant_drop_tightening;
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mod single_char_idents;
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mod single_char_lifetime_names;
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mod single_component_path_imports;
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mod size_of_in_element_count;
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@ -1034,10 +1034,12 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
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store.register_late_pass(|_| Box::new(redundant_type_annotations::RedundantTypeAnnotations));
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store.register_late_pass(|_| Box::new(arc_with_non_send_sync::ArcWithNonSendSync));
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store.register_late_pass(|_| Box::new(needless_if::NeedlessIf));
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let allowed_idents = conf.allowed_idents.clone();
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store.register_early_pass(move || {
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Box::new(single_char_idents::SingleCharIdents {
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allowed_idents: allowed_idents.clone(),
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let allowed_idents_below_min_chars = conf.allowed_idents_below_min_chars.clone();
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let min_ident_chars_threshold = conf.min_ident_chars_threshold;
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store.register_late_pass(move |_| {
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Box::new(min_ident_chars::MinIdentChars {
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allowed_idents_below_min_chars: allowed_idents_below_min_chars.clone(),
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min_ident_chars_threshold,
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})
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});
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// add lints here, do not remove this comment, it's used in `new_lint`
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133
clippy_lints/src/min_ident_chars.rs
Normal file
133
clippy_lints/src/min_ident_chars.rs
Normal file
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@ -0,0 +1,133 @@
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use clippy_utils::{diagnostics::span_lint, is_from_proc_macro};
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use rustc_data_structures::fx::FxHashSet;
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use rustc_hir::{
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def::{DefKind, Res},
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intravisit::{walk_item, Visitor},
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GenericParamKind, HirId, Item, ItemKind, ItemLocalId, Node,
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};
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use rustc_lint::{LateContext, LateLintPass, LintContext};
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use rustc_middle::lint::in_external_macro;
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use rustc_session::{declare_tool_lint, impl_lint_pass};
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use std::borrow::Cow;
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declare_clippy_lint! {
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/// ### What it does
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/// Checks for idents which comprise of a single letter.
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///
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/// Note: This lint can be very noisy when enabled; it may be desirable to only enable it
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/// temporarily.
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///
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/// ### Why is this bad?
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/// In many cases it's not, but at times it can severely hinder readability. Some codebases may
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/// wish to disallow this to improve readability.
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///
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/// ### Example
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/// ```rust,ignore
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/// for m in movies {
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/// let title = m.t;
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/// }
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/// ```
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/// Use instead:
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/// ```rust,ignore
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/// for movie in movies {
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/// let title = movie.title;
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/// }
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/// ```
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/// ```
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#[clippy::version = "1.72.0"]
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pub MIN_IDENT_CHARS,
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restriction,
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"disallows idents that are too short"
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}
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impl_lint_pass!(MinIdentChars => [MIN_IDENT_CHARS]);
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#[derive(Clone)]
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pub struct MinIdentChars {
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pub allowed_idents_below_min_chars: FxHashSet<String>,
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pub min_ident_chars_threshold: u64,
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}
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impl LateLintPass<'_> for MinIdentChars {
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fn check_item(&mut self, cx: &LateContext<'_>, item: &Item<'_>) {
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if self.min_ident_chars_threshold == 0 {
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return;
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}
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walk_item(&mut IdentVisitor { conf: self, cx }, item);
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}
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}
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struct IdentVisitor<'cx, 'tcx> {
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conf: &'cx MinIdentChars,
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cx: &'cx LateContext<'tcx>,
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}
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#[expect(clippy::cast_possible_truncation)]
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impl Visitor<'_> for IdentVisitor<'_, '_> {
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fn visit_id(&mut self, hir_id: HirId) {
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let Self { conf, cx } = *self;
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// Reimplementation of `find`, as it uses indexing, which can (and will in async functions) panic.
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// This should probably be fixed on the rustc side, this is just a temporary workaround.
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// FIXME: Remove me if/when this is fixed in rustc
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let node = if hir_id.local_id == ItemLocalId::from_u32(0) {
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// In this case, we can just use `find`, `Owner`'s `node` field is private anyway so we can't
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// reimplement it even if we wanted to
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cx.tcx.hir().find(hir_id)
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} else {
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let Some(owner) = cx.tcx.hir_owner_nodes(hir_id.owner).as_owner() else {
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return;
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};
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owner.nodes.get(hir_id.local_id).copied().flatten().map(|p| p.node)
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};
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let Some(node) = node else {
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return;
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};
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let Some(ident) = node.ident() else {
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return;
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};
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let str = ident.as_str();
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if !in_external_macro(cx.sess(), ident.span)
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&& str.len() <= conf.min_ident_chars_threshold as usize
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&& !str.is_empty()
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&& conf.allowed_idents_below_min_chars.get(&str.to_owned()).is_none()
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{
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if let Node::Item(item) = node && let ItemKind::Use(..) = item.kind {
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return;
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}
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// `struct Awa<T>(T)`
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// ^
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if let Node::PathSegment(path) = node {
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if let Res::Def(def_kind, ..) = path.res && let DefKind::TyParam = def_kind {
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return;
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}
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if matches!(path.res, Res::PrimTy(..)) || path.res.opt_def_id().is_some_and(|def_id| !def_id.is_local())
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{
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return;
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}
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}
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// `struct Awa<T>(T)`
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// ^
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if let Node::GenericParam(generic_param) = node
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&& let GenericParamKind::Type { .. } = generic_param.kind
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{
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return;
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}
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if is_from_proc_macro(cx, &ident) {
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return;
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}
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let help = if conf.min_ident_chars_threshold == 1 {
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Cow::Borrowed("this ident consists of a single char")
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} else {
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Cow::Owned(format!(
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"this ident is too short ({} <= {}) ",
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str.len(),
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conf.min_ident_chars_threshold
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))
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};
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span_lint(cx, MIN_IDENT_CHARS, ident.span, &help);
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}
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}
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}
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@ -1,59 +0,0 @@
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use clippy_utils::{diagnostics::span_lint, source::snippet};
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use itertools::Itertools;
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use rustc_data_structures::fx::FxHashSet;
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use rustc_lint::{EarlyContext, EarlyLintPass, LintContext};
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use rustc_middle::lint::in_external_macro;
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use rustc_session::{declare_tool_lint, impl_lint_pass};
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use rustc_span::symbol::Ident;
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declare_clippy_lint! {
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/// ### What it does
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/// Checks for idents which comprise of a single letter.
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///
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/// Note: This lint can be very noisy when enabled; it even lints generics! it may be desirable
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/// to only enable it temporarily.
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///
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/// ### Why is this bad?
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/// In many cases it's not, but at times it can severely hinder readability. Some codebases may
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/// wish to disallow this to improve readability.
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///
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/// ### Example
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/// ```rust,ignore
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/// for m in movies {
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/// let title = m.t;
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/// }
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/// ```
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/// Use instead:
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/// ```rust,ignore
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/// for movie in movies {
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/// let title = movie.title;
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/// }
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/// ```
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/// ```
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#[clippy::version = "1.72.0"]
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pub SINGLE_CHAR_IDENTS,
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restriction,
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"disallows idents that can be represented as a char"
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}
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impl_lint_pass!(SingleCharIdents => [SINGLE_CHAR_IDENTS]);
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#[derive(Clone)]
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pub struct SingleCharIdents {
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pub allowed_idents: FxHashSet<char>,
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}
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impl EarlyLintPass for SingleCharIdents {
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fn check_ident(&mut self, cx: &EarlyContext<'_>, ident: Ident) {
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let str = ident.name.as_str();
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let chars = str.chars();
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if let [char, rest @ ..] = &*chars.collect_vec()
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&& rest.is_empty()
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&& self.allowed_idents.get(char).is_none()
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&& !in_external_macro(cx.sess(), ident.span)
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// Ignore proc macros. Let's implement `WithSearchPat` for early lints someday :)
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&& snippet(cx, ident.span, str) == str
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{
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span_lint(cx, SINGLE_CHAR_IDENTS, ident.span, "this ident comprises of a single char");
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}
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}
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}
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@ -34,7 +34,7 @@ const DEFAULT_DOC_VALID_IDENTS: &[&str] = &[
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"CamelCase",
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];
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const DEFAULT_DISALLOWED_NAMES: &[&str] = &["foo", "baz", "quux"];
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const DEFAULT_ALLOWED_IDENTS: &[char] = &['i', 'j', 'x', 'y', 'z', 'n'];
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const DEFAULT_ALLOWED_IDENTS_BELOW_MIN_CHARS: &[&str] = &["i", "j", "x", "y", "z", "n"];
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/// Holds information used by `MISSING_ENFORCED_IMPORT_RENAMES` lint.
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#[derive(Clone, Debug, Deserialize)]
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@ -523,6 +523,15 @@ define_Conf! {
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///
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/// Whether to allow module inception if it's not public.
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(allow_private_module_inception: bool = false),
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/// Lint: MIN_IDENT_CHARS.
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///
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/// Allowed names below the minimum allowed characters.
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(allowed_idents_below_min_chars: rustc_data_structures::fx::FxHashSet<String> =
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super::DEFAULT_ALLOWED_IDENTS_BELOW_MIN_CHARS.iter().map(ToString::to_string).collect()),
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/// Lint: MIN_IDENT_CHARS.
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///
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/// Minimum chars an ident can have, anything below or equal to this will be linted.
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(min_ident_chars_threshold: u64 = 1),
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}
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/// Search for the configuration file.
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3
tests/ui-toml/min_ident_chars/auxiliary/extern_types.rs
Normal file
3
tests/ui-toml/min_ident_chars/auxiliary/extern_types.rs
Normal file
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@ -0,0 +1,3 @@
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#![allow(nonstandard_style, unused)]
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pub struct Aaa;
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2
tests/ui-toml/min_ident_chars/clippy.toml
Normal file
2
tests/ui-toml/min_ident_chars/clippy.toml
Normal file
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@ -0,0 +1,2 @@
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allowed-idents-below-min-chars = ["Owo", "Uwu", "wha", "t_e", "lse", "_do", "_i_", "put", "her", "_e"]
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min-ident-chars-threshold = 3
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17
tests/ui-toml/min_ident_chars/min_ident_chars.rs
Normal file
17
tests/ui-toml/min_ident_chars/min_ident_chars.rs
Normal file
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@ -0,0 +1,17 @@
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//@aux-build:extern_types.rs
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#![allow(nonstandard_style, unused)]
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#![warn(clippy::min_ident_chars)]
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extern crate extern_types;
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use extern_types::Aaa;
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struct Owo {
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Uwu: u128,
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aaa: Aaa,
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}
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fn main() {
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let wha = 1;
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let vvv = 1;
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let uuu = 1;
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}
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16
tests/ui-toml/min_ident_chars/min_ident_chars.stderr
Normal file
16
tests/ui-toml/min_ident_chars/min_ident_chars.stderr
Normal file
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@ -0,0 +1,16 @@
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error: this ident is too short (3 <= 3)
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--> $DIR/min_ident_chars.rs:6:19
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LL | use extern_types::Aaa;
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| ^^^
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|
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= note: `-D clippy::min-ident-chars` implied by `-D warnings`
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error: this ident is too short (3 <= 3)
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--> $DIR/min_ident_chars.rs:10:5
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|
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LL | aaa: Aaa,
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| ^^^
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error: aborting due to 2 previous errors
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@ -5,7 +5,7 @@ error: error reading Clippy's configuration file: unknown field `foobar`, expect
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allow-print-in-tests
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allow-private-module-inception
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allow-unwrap-in-tests
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allowed-idents
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allowed-idents-below-min-chars
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allowed-scripts
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arithmetic-side-effects-allowed
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arithmetic-side-effects-allowed-binary
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@ -37,6 +37,7 @@ error: error reading Clippy's configuration file: unknown field `foobar`, expect
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max-struct-bools
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max-suggested-slice-pattern-length
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max-trait-bounds
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min-ident-chars-threshold
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missing-docs-in-crate-items
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msrv
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pass-by-value-size-limit
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|
@ -69,7 +70,7 @@ error: error reading Clippy's configuration file: unknown field `barfoo`, expect
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allow-print-in-tests
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allow-private-module-inception
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allow-unwrap-in-tests
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allowed-idents
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allowed-idents-below-min-chars
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allowed-scripts
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arithmetic-side-effects-allowed
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arithmetic-side-effects-allowed-binary
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|
@ -101,6 +102,7 @@ error: error reading Clippy's configuration file: unknown field `barfoo`, expect
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max-struct-bools
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max-suggested-slice-pattern-length
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max-trait-bounds
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min-ident-chars-threshold
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missing-docs-in-crate-items
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msrv
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pass-by-value-size-limit
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|
|
|
@ -1,6 +1,6 @@
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//@aux-build:proc_macros.rs
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#![allow(nonstandard_style, unused)]
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#![warn(clippy::single_char_idents)]
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#![warn(clippy::min_ident_chars)]
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extern crate proc_macros;
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use proc_macros::external;
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@ -38,11 +38,11 @@ fn main() {
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let w = 1;
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// Ok, not this one
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// let i = 1;
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let j = 1;
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let n = 1;
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let x = 1;
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let y = 1;
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let z = 1;
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let jz = 1;
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let nz = 1;
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let zx = 1;
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let yz = 1;
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let zz = 1;
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for j in 0..1000 {}
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|
70
tests/ui/min_ident_chars.stderr
Normal file
70
tests/ui/min_ident_chars.stderr
Normal file
|
@ -0,0 +1,70 @@
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error: this ident consists of a single char
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--> $DIR/min_ident_chars.rs:9:8
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|
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LL | struct A {
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||||
| ^
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||||
|
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= note: `-D clippy::min-ident-chars` implied by `-D warnings`
|
||||
|
||||
error: this ident consists of a single char
|
||||
--> $DIR/min_ident_chars.rs:10:5
|
||||
|
|
||||
LL | a: u32,
|
||||
| ^
|
||||
|
||||
error: this ident consists of a single char
|
||||
--> $DIR/min_ident_chars.rs:12:5
|
||||
|
|
||||
LL | A: u32,
|
||||
| ^
|
||||
|
||||
error: this ident consists of a single char
|
||||
--> $DIR/min_ident_chars.rs:13:5
|
||||
|
|
||||
LL | I: u32,
|
||||
| ^
|
||||
|
||||
error: this ident consists of a single char
|
||||
--> $DIR/min_ident_chars.rs:16:8
|
||||
|
|
||||
LL | struct B(u32);
|
||||
| ^
|
||||
|
||||
error: this ident consists of a single char
|
||||
--> $DIR/min_ident_chars.rs:20:6
|
||||
|
|
||||
LL | enum C {
|
||||
| ^
|
||||
|
||||
error: this ident consists of a single char
|
||||
--> $DIR/min_ident_chars.rs:21:5
|
||||
|
|
||||
LL | D,
|
||||
| ^
|
||||
|
||||
error: this ident consists of a single char
|
||||
--> $DIR/min_ident_chars.rs:22:5
|
||||
|
|
||||
LL | E,
|
||||
| ^
|
||||
|
||||
error: this ident consists of a single char
|
||||
--> $DIR/min_ident_chars.rs:23:5
|
||||
|
|
||||
LL | F,
|
||||
| ^
|
||||
|
||||
error: this ident consists of a single char
|
||||
--> $DIR/min_ident_chars.rs:31:5
|
||||
|
|
||||
LL | w: u32,
|
||||
| ^
|
||||
|
||||
error: this ident consists of a single char
|
||||
--> $DIR/min_ident_chars.rs:58:4
|
||||
|
|
||||
LL | fn b() {}
|
||||
| ^
|
||||
|
||||
error: aborting due to 11 previous errors
|
||||
|
|
@ -1,100 +0,0 @@
|
|||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:9:8
|
||||
|
|
||||
LL | struct A {
|
||||
| ^
|
||||
|
|
||||
= note: `-D clippy::single-char-idents` implied by `-D warnings`
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:10:5
|
||||
|
|
||||
LL | a: u32,
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:12:5
|
||||
|
|
||||
LL | A: u32,
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:13:5
|
||||
|
|
||||
LL | I: u32,
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:16:8
|
||||
|
|
||||
LL | struct B(u32);
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:20:6
|
||||
|
|
||||
LL | enum C {
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:21:5
|
||||
|
|
||||
LL | D,
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:22:5
|
||||
|
|
||||
LL | E,
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:23:5
|
||||
|
|
||||
LL | F,
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:31:5
|
||||
|
|
||||
LL | w: u32,
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:34:11
|
||||
|
|
||||
LL | struct AA<T, E>(T, E);
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:34:14
|
||||
|
|
||||
LL | struct AA<T, E>(T, E);
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:34:17
|
||||
|
|
||||
LL | struct AA<T, E>(T, E);
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:34:20
|
||||
|
|
||||
LL | struct AA<T, E>(T, E);
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:38:9
|
||||
|
|
||||
LL | let w = 1;
|
||||
| ^
|
||||
|
||||
error: this ident comprises of a single char
|
||||
--> $DIR/single_char_idents.rs:58:4
|
||||
|
|
||||
LL | fn b() {}
|
||||
| ^
|
||||
|
||||
error: aborting due to 16 previous errors
|
||||
|
Loading…
Reference in a new issue