Only lint manual_non_exhaustive for exported types
This commit is contained in:
Alex Macleod
parent
a81f1c8277
commit
f7f550561e
@ -633,8 +633,7 @@ pub fn register_lints(store: &mut rustc_lint::LintStore, conf: &'static Conf) {
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let format_args = format_args_storage.clone();
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store.register_late_pass(move |_| Box::new(methods::Methods::new(conf, format_args.clone())));
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store.register_late_pass(move |_| Box::new(matches::Matches::new(conf)));
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store.register_early_pass(move || Box::new(manual_non_exhaustive::ManualNonExhaustiveStruct::new(conf)));
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store.register_late_pass(move |_| Box::new(manual_non_exhaustive::ManualNonExhaustiveEnum::new(conf)));
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store.register_late_pass(move |_| Box::new(manual_non_exhaustive::ManualNonExhaustive::new(conf)));
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store.register_late_pass(move |_| Box::new(manual_strip::ManualStrip::new(conf)));
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store.register_early_pass(move || Box::new(redundant_static_lifetimes::RedundantStaticLifetimes::new(conf)));
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store.register_early_pass(move || Box::new(redundant_field_names::RedundantFieldNames::new(conf)));
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@ -2,16 +2,16 @@
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use clippy_config::Conf;
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use clippy_utils::diagnostics::{span_lint_and_then, span_lint_hir_and_then};
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use clippy_utils::is_doc_hidden;
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use clippy_utils::source::SpanRangeExt;
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use rustc_ast::ast::{self, VisibilityKind};
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use clippy_utils::source::snippet_indent;
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use itertools::Itertools;
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use rustc_ast::attr;
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use rustc_data_structures::fx::FxHashSet;
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use rustc_errors::Applicability;
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use rustc_hir::def::{CtorKind, CtorOf, DefKind, Res};
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use rustc_hir::{self as hir, Expr, ExprKind, QPath};
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use rustc_lint::{EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintContext};
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use rustc_hir::{Expr, ExprKind, Item, ItemKind, QPath, TyKind, VariantData};
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use rustc_lint::{LateContext, LateLintPass};
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use rustc_session::impl_lint_pass;
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use rustc_span::def_id::{DefId, LocalDefId};
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use rustc_span::def_id::LocalDefId;
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use rustc_span::{sym, Span};
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declare_clippy_lint! {
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@ -62,29 +62,13 @@
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"manual implementations of the non-exhaustive pattern can be simplified using #[non_exhaustive]"
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}
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#[expect(clippy::module_name_repetitions)]
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pub struct ManualNonExhaustiveStruct {
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pub struct ManualNonExhaustive {
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msrv: Msrv,
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}
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impl ManualNonExhaustiveStruct {
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pub fn new(conf: &'static Conf) -> Self {
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Self {
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msrv: conf.msrv.clone(),
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}
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}
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}
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impl_lint_pass!(ManualNonExhaustiveStruct => [MANUAL_NON_EXHAUSTIVE]);
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#[expect(clippy::module_name_repetitions)]
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pub struct ManualNonExhaustiveEnum {
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msrv: Msrv,
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constructed_enum_variants: FxHashSet<(DefId, DefId)>,
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constructed_enum_variants: FxHashSet<LocalDefId>,
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potential_enums: Vec<(LocalDefId, LocalDefId, Span, Span)>,
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}
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impl ManualNonExhaustiveEnum {
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impl ManualNonExhaustive {
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pub fn new(conf: &'static Conf) -> Self {
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Self {
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msrv: conf.msrv.clone(),
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@ -94,96 +78,78 @@ pub fn new(conf: &'static Conf) -> Self {
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}
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}
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impl_lint_pass!(ManualNonExhaustiveEnum => [MANUAL_NON_EXHAUSTIVE]);
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impl_lint_pass!(ManualNonExhaustive => [MANUAL_NON_EXHAUSTIVE]);
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impl EarlyLintPass for ManualNonExhaustiveStruct {
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fn check_item(&mut self, cx: &EarlyContext<'_>, item: &ast::Item) {
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if let ast::ItemKind::Struct(variant_data, _) = &item.kind
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&& let (fields, delimiter) = match variant_data {
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ast::VariantData::Struct { fields, .. } => (&**fields, '{'),
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ast::VariantData::Tuple(fields, _) => (&**fields, '('),
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ast::VariantData::Unit(_) => return,
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}
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&& fields.len() > 1
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&& self.msrv.meets(msrvs::NON_EXHAUSTIVE)
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{
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let mut iter = fields.iter().filter_map(|f| match f.vis.kind {
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VisibilityKind::Public => None,
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VisibilityKind::Inherited => Some(Ok(f)),
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VisibilityKind::Restricted { .. } => Some(Err(())),
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});
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if let Some(Ok(field)) = iter.next()
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&& iter.next().is_none()
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&& field.ty.kind.is_unit()
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{
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span_lint_and_then(
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cx,
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MANUAL_NON_EXHAUSTIVE,
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item.span,
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"this seems like a manual implementation of the non-exhaustive pattern",
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|diag| {
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if !item.attrs.iter().any(|attr| attr.has_name(sym::non_exhaustive))
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&& let header_span = cx.sess().source_map().span_until_char(item.span, delimiter)
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&& let Some(snippet) = header_span.get_source_text(cx)
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{
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diag.span_suggestion(
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header_span,
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"add the attribute",
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format!("#[non_exhaustive] {snippet}"),
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Applicability::Unspecified,
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);
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}
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diag.span_help(field.span, "remove this field");
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},
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);
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}
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}
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}
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extract_msrv_attr!(EarlyContext);
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}
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impl<'tcx> LateLintPass<'tcx> for ManualNonExhaustiveEnum {
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fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_>) {
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if !self.msrv.meets(msrvs::NON_EXHAUSTIVE) {
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impl<'tcx> LateLintPass<'tcx> for ManualNonExhaustive {
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fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) {
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if !self.msrv.meets(msrvs::NON_EXHAUSTIVE) || !cx.effective_visibilities.is_exported(item.owner_id.def_id) {
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return;
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}
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if let hir::ItemKind::Enum(def, _) = &item.kind
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&& def.variants.len() > 1
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{
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let mut iter = def.variants.iter().filter_map(|v| {
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(matches!(v.data, hir::VariantData::Unit(_, _))
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&& is_doc_hidden(cx.tcx.hir().attrs(v.hir_id))
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&& !attr::contains_name(cx.tcx.hir().attrs(item.hir_id()), sym::non_exhaustive))
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.then_some((v.def_id, v.span))
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});
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if let Some((id, span)) = iter.next()
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&& iter.next().is_none()
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{
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self.potential_enums.push((item.owner_id.def_id, id, item.span, span));
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}
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match item.kind {
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ItemKind::Enum(def, _) if def.variants.len() > 1 => {
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let iter = def.variants.iter().filter_map(|v| {
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(matches!(v.data, VariantData::Unit(_, _)) && is_doc_hidden(cx.tcx.hir().attrs(v.hir_id)))
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.then_some((v.def_id, v.span))
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});
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if let Ok((id, span)) = iter.exactly_one()
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&& !attr::contains_name(cx.tcx.hir().attrs(item.hir_id()), sym::non_exhaustive)
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{
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self.potential_enums.push((item.owner_id.def_id, id, item.span, span));
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}
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},
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ItemKind::Struct(variant_data, _) => {
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let fields = variant_data.fields();
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let private_fields = fields
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.iter()
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.filter(|field| !cx.effective_visibilities.is_exported(field.def_id));
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if fields.len() > 1
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&& let Ok(field) = private_fields.exactly_one()
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&& let TyKind::Tup([]) = field.ty.kind
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{
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span_lint_and_then(
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cx,
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MANUAL_NON_EXHAUSTIVE,
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item.span,
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"this seems like a manual implementation of the non-exhaustive pattern",
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|diag| {
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if let Some(non_exhaustive) =
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attr::find_by_name(cx.tcx.hir().attrs(item.hir_id()), sym::non_exhaustive)
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{
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diag.span_note(non_exhaustive.span, "the struct is already non-exhaustive");
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} else {
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let indent = snippet_indent(cx, item.span).unwrap_or_default();
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diag.span_suggestion_verbose(
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item.span.shrink_to_lo(),
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"use the `#[non_exhaustive]` attribute instead",
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format!("#[non_exhaustive]\n{indent}"),
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Applicability::MaybeIncorrect,
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);
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}
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diag.span_help(field.span, "remove this field");
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},
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);
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}
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},
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_ => {},
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}
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}
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fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) {
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if let ExprKind::Path(QPath::Resolved(None, p)) = &e.kind
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&& let Res::Def(DefKind::Ctor(CtorOf::Variant, CtorKind::Const), id) = p.res
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&& let Res::Def(DefKind::Ctor(CtorOf::Variant, CtorKind::Const), ctor_id) = p.res
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&& let Some(local_ctor) = ctor_id.as_local()
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{
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let variant_id = cx.tcx.parent(id);
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let enum_id = cx.tcx.parent(variant_id);
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self.constructed_enum_variants.insert((enum_id, variant_id));
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let variant_id = cx.tcx.local_parent(local_ctor);
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self.constructed_enum_variants.insert(variant_id);
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}
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}
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fn check_crate_post(&mut self, cx: &LateContext<'tcx>) {
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for &(enum_id, _, enum_span, variant_span) in
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self.potential_enums.iter().filter(|&&(enum_id, variant_id, _, _)| {
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!self
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.constructed_enum_variants
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.contains(&(enum_id.to_def_id(), variant_id.to_def_id()))
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})
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for &(enum_id, _, enum_span, variant_span) in self
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.potential_enums
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.iter()
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.filter(|(_, variant_id, _, _)| !self.constructed_enum_variants.contains(variant_id))
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{
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let hir_id = cx.tcx.local_def_id_to_hir_id(enum_id);
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span_lint_hir_and_then(
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@ -193,15 +159,13 @@ fn check_crate_post(&mut self, cx: &LateContext<'tcx>) {
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enum_span,
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"this seems like a manual implementation of the non-exhaustive pattern",
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|diag| {
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let header_span = cx.sess().source_map().span_until_char(enum_span, '{');
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if let Some(snippet) = header_span.get_source_text(cx) {
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diag.span_suggestion(
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header_span,
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"add the attribute",
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format!("#[non_exhaustive] {snippet}"),
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Applicability::Unspecified,
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);
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}
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let indent = snippet_indent(cx, enum_span).unwrap_or_default();
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diag.span_suggestion_verbose(
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enum_span.shrink_to_lo(),
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"use the `#[non_exhaustive]` attribute instead",
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format!("#[non_exhaustive]\n{indent}"),
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Applicability::MaybeIncorrect,
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);
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diag.span_help(variant_span, "remove this variant");
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},
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);
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@ -1,8 +1,8 @@
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#![warn(clippy::manual_non_exhaustive)]
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#![allow(unused)]
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//@no-rustfix
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enum E {
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//~^ ERROR: this seems like a manual implementation of the non-exhaustive pattern
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pub enum E {
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//~^ manual_non_exhaustive
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A,
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B,
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#[doc(hidden)]
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@ -11,7 +11,7 @@ enum E {
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// if the user explicitly marks as nonexhaustive we shouldn't warn them
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#[non_exhaustive]
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enum Ep {
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pub enum Ep {
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A,
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B,
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#[doc(hidden)]
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@ -19,14 +19,14 @@ enum Ep {
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}
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// marker variant does not have doc hidden attribute, should be ignored
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enum NoDocHidden {
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pub enum NoDocHidden {
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A,
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B,
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_C,
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}
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// name of variant with doc hidden does not start with underscore
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enum NoUnderscore {
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pub enum NoUnderscore {
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A,
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B,
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#[doc(hidden)]
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@ -34,7 +34,7 @@ enum NoUnderscore {
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}
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// variant with doc hidden is not unit, should be ignored
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enum NotUnit {
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pub enum NotUnit {
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A,
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B,
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#[doc(hidden)]
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@ -42,13 +42,13 @@ enum NotUnit {
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}
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// variant with doc hidden is the only one, should be ignored
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enum OnlyMarker {
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pub enum OnlyMarker {
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#[doc(hidden)]
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_A,
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}
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// variant with multiple markers, should be ignored
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enum MultipleMarkers {
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pub enum MultipleMarkers {
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A,
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#[doc(hidden)]
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_B,
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@ -58,13 +58,13 @@ enum MultipleMarkers {
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// already non_exhaustive and no markers, should be ignored
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#[non_exhaustive]
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enum NonExhaustive {
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pub enum NonExhaustive {
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A,
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B,
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}
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// marked is used, don't lint
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enum UsedHidden {
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pub enum UsedHidden {
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#[doc(hidden)]
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_A,
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B,
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@ -77,11 +77,9 @@ fn foo(x: &mut UsedHidden) {
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}
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#[expect(clippy::manual_non_exhaustive)]
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enum ExpectLint {
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pub enum ExpectLint {
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A,
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B,
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#[doc(hidden)]
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_C,
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}
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fn main() {}
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@ -1,11 +1,7 @@
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error: this seems like a manual implementation of the non-exhaustive pattern
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--> tests/ui/manual_non_exhaustive_enum.rs:4:1
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LL | enum E {
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| ^-----
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| |
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| _help: add the attribute: `#[non_exhaustive] enum E`
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| |
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LL | / pub enum E {
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LL | |
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LL | | A,
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LL | | B,
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@ -21,15 +17,16 @@ LL | _C,
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| ^^
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= note: `-D clippy::manual-non-exhaustive` implied by `-D warnings`
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= help: to override `-D warnings` add `#[allow(clippy::manual_non_exhaustive)]`
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help: use the `#[non_exhaustive]` attribute instead
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|
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LL + #[non_exhaustive]
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LL | pub enum E {
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|
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error: this seems like a manual implementation of the non-exhaustive pattern
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--> tests/ui/manual_non_exhaustive_enum.rs:29:1
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|
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LL | enum NoUnderscore {
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| ^----------------
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| |
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| _help: add the attribute: `#[non_exhaustive] enum NoUnderscore`
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| |
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LL | / pub enum NoUnderscore {
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LL | | A,
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LL | | B,
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LL | | #[doc(hidden)]
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@ -42,6 +39,11 @@ help: remove this variant
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|
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LL | C,
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| ^
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help: use the `#[non_exhaustive]` attribute instead
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|
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LL + #[non_exhaustive]
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LL | pub enum NoUnderscore {
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|
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error: aborting due to 2 previous errors
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@ -1,9 +1,9 @@
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#![warn(clippy::manual_non_exhaustive)]
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#![allow(unused)]
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//@no-rustfix
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mod structs {
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struct S {
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//~^ ERROR: this seems like a manual implementation of the non-exhaustive pattern
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pub mod structs {
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pub struct S {
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//~^ manual_non_exhaustive
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pub a: i32,
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pub b: i32,
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_c: (),
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@ -11,68 +11,76 @@ struct S {
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// user forgot to remove the private field
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#[non_exhaustive]
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struct Sp {
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//~^ ERROR: this seems like a manual implementation of the non-exhaustive pattern
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pub struct Sp {
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//~^ manual_non_exhaustive
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pub a: i32,
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pub b: i32,
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_c: (),
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}
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// some other fields are private, should be ignored
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struct PrivateFields {
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pub struct PrivateFields {
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a: i32,
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pub b: i32,
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_c: (),
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}
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// private field name does not start with underscore, should be ignored
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struct NoUnderscore {
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pub struct NoUnderscore {
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//~^ manual_non_exhaustive
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pub a: i32,
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pub b: i32,
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c: (),
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}
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// private field is not unit type, should be ignored
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struct NotUnit {
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pub struct NotUnit {
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pub a: i32,
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pub b: i32,
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_c: i32,
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}
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// private field is the only field, should be ignored
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struct OnlyMarker {
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pub struct OnlyMarker {
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_a: (),
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}
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// already non exhaustive and no private fields, should be ignored
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#[non_exhaustive]
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struct NonExhaustive {
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pub struct NonExhaustive {
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pub a: i32,
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pub b: i32,
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}
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}
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|
||||
mod tuple_structs {
|
||||
struct T(pub i32, pub i32, ());
|
||||
//~^ ERROR: this seems like a manual implementation of the non-exhaustive pattern
|
||||
pub mod tuple_structs {
|
||||
pub struct T(pub i32, pub i32, ());
|
||||
//~^ manual_non_exhaustive
|
||||
|
||||
// user forgot to remove the private field
|
||||
#[non_exhaustive]
|
||||
struct Tp(pub i32, pub i32, ());
|
||||
//~^ ERROR: this seems like a manual implementation of the non-exhaustive pattern
|
||||
pub struct Tp(pub i32, pub i32, ());
|
||||
//~^ manual_non_exhaustive
|
||||
|
||||
// some other fields are private, should be ignored
|
||||
struct PrivateFields(pub i32, i32, ());
|
||||
pub struct PrivateFields(pub i32, i32, ());
|
||||
|
||||
// private field is not unit type, should be ignored
|
||||
struct NotUnit(pub i32, pub i32, i32);
|
||||
pub struct NotUnit(pub i32, pub i32, i32);
|
||||
|
||||
// private field is the only field, should be ignored
|
||||
struct OnlyMarker(());
|
||||
pub struct OnlyMarker(());
|
||||
|
||||
// already non exhaustive and no private fields, should be ignored
|
||||
#[non_exhaustive]
|
||||
struct NonExhaustive(pub i32, pub i32);
|
||||
pub struct NonExhaustive(pub i32, pub i32);
|
||||
}
|
||||
|
||||
fn main() {}
|
||||
mod private {
|
||||
// Don't lint structs that are not actually public as `#[non_exhaustive]` only applies to
|
||||
// external crates. The manual pattern can still be used to get module local non exhaustiveness
|
||||
pub struct NotPublic {
|
||||
pub a: i32,
|
||||
pub b: i32,
|
||||
_c: (),
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,11 +1,7 @@
|
||||
error: this seems like a manual implementation of the non-exhaustive pattern
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:5:5
|
||||
|
|
||||
LL | struct S {
|
||||
| ^-------
|
||||
| |
|
||||
| _____help: add the attribute: `#[non_exhaustive] struct S`
|
||||
| |
|
||||
LL | / pub struct S {
|
||||
LL | |
|
||||
LL | | pub a: i32,
|
||||
LL | | pub b: i32,
|
||||
@ -20,11 +16,16 @@ LL | _c: (),
|
||||
| ^^^^^^
|
||||
= note: `-D clippy::manual-non-exhaustive` implied by `-D warnings`
|
||||
= help: to override `-D warnings` add `#[allow(clippy::manual_non_exhaustive)]`
|
||||
help: use the `#[non_exhaustive]` attribute instead
|
||||
|
|
||||
LL ~ #[non_exhaustive]
|
||||
LL ~ pub struct S {
|
||||
|
|
||||
|
||||
error: this seems like a manual implementation of the non-exhaustive pattern
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:14:5
|
||||
|
|
||||
LL | / struct Sp {
|
||||
LL | / pub struct Sp {
|
||||
LL | |
|
||||
LL | | pub a: i32,
|
||||
LL | | pub b: i32,
|
||||
@ -32,6 +33,11 @@ LL | | _c: (),
|
||||
LL | | }
|
||||
| |_____^
|
||||
|
|
||||
note: the struct is already non-exhaustive
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:13:5
|
||||
|
|
||||
LL | #[non_exhaustive]
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
help: remove this field
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:18:9
|
||||
|
|
||||
@ -39,13 +45,10 @@ LL | _c: (),
|
||||
| ^^^^^^
|
||||
|
||||
error: this seems like a manual implementation of the non-exhaustive pattern
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:29:5
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:28:5
|
||||
|
|
||||
LL | struct NoUnderscore {
|
||||
| ^------------------
|
||||
| |
|
||||
| _____help: add the attribute: `#[non_exhaustive] struct NoUnderscore`
|
||||
| |
|
||||
LL | / pub struct NoUnderscore {
|
||||
LL | |
|
||||
LL | | pub a: i32,
|
||||
LL | | pub b: i32,
|
||||
LL | | c: (),
|
||||
@ -57,32 +60,45 @@ help: remove this field
|
||||
|
|
||||
LL | c: (),
|
||||
| ^^^^^
|
||||
help: use the `#[non_exhaustive]` attribute instead
|
||||
|
|
||||
LL ~ #[non_exhaustive]
|
||||
LL ~ pub struct NoUnderscore {
|
||||
|
|
||||
|
||||
error: this seems like a manual implementation of the non-exhaustive pattern
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:56:5
|
||||
|
|
||||
LL | struct T(pub i32, pub i32, ());
|
||||
| --------^^^^^^^^^^^^^^^^^^^^^^^
|
||||
| |
|
||||
| help: add the attribute: `#[non_exhaustive] struct T`
|
||||
LL | pub struct T(pub i32, pub i32, ());
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
help: remove this field
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:56:32
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:56:36
|
||||
|
|
||||
LL | pub struct T(pub i32, pub i32, ());
|
||||
| ^^
|
||||
help: use the `#[non_exhaustive]` attribute instead
|
||||
|
|
||||
LL ~ #[non_exhaustive]
|
||||
LL ~ pub struct T(pub i32, pub i32, ());
|
||||
|
|
||||
LL | struct T(pub i32, pub i32, ());
|
||||
| ^^
|
||||
|
||||
error: this seems like a manual implementation of the non-exhaustive pattern
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:61:5
|
||||
|
|
||||
LL | struct Tp(pub i32, pub i32, ());
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
LL | pub struct Tp(pub i32, pub i32, ());
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
note: the struct is already non-exhaustive
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:60:5
|
||||
|
|
||||
LL | #[non_exhaustive]
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
help: remove this field
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:61:33
|
||||
--> tests/ui/manual_non_exhaustive_struct.rs:61:37
|
||||
|
|
||||
LL | struct Tp(pub i32, pub i32, ());
|
||||
| ^^
|
||||
LL | pub struct Tp(pub i32, pub i32, ());
|
||||
| ^^
|
||||
|
||||
error: aborting due to 5 previous errors
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user