diff --git a/compiler/rustc_lint_defs/src/builtin.rs b/compiler/rustc_lint_defs/src/builtin.rs index 69b462d32bd55..e742014b44c73 100644 --- a/compiler/rustc_lint_defs/src/builtin.rs +++ b/compiler/rustc_lint_defs/src/builtin.rs @@ -3993,8 +3993,13 @@ declare_lint! { } declare_lint! { - /// The `non_exhaustive_omitted_patterns` lint detects when a wildcard (`_` or `..`) in a - /// pattern for a `#[non_exhaustive]` struct or enum is reachable. + /// The `non_exhaustive_omitted_patterns` lint aims to help consumers of a `#[non_exhaustive]` + /// struct or enum who want to match all of its fields/variants explicitly. + /// + /// The `#[non_exhaustive]` annotation forces matches to use wildcards, so exhaustiveness + /// checking cannot be used to ensure that all fields/variants are matched explicitly. To remedy + /// this, this allow-by-default lint warns the user when a match mentions some but not all of + /// the fields/variants of a `#[non_exhaustive]` struct or enum. /// /// ### Example /// @@ -4008,9 +4013,9 @@ declare_lint! { /// /// // in crate B /// #![feature(non_exhaustive_omitted_patterns_lint)] + /// #[warn(non_exhaustive_omitted_patterns)] /// match Bar::A { /// Bar::A => {}, - /// #[warn(non_exhaustive_omitted_patterns)] /// _ => {}, /// } /// ``` @@ -4018,29 +4023,32 @@ declare_lint! { /// This will produce: /// /// ```text - /// warning: reachable patterns not covered of non exhaustive enum + /// warning: some variants are not matched explicitly /// --> $DIR/reachable-patterns.rs:70:9 /// | - /// LL | _ => {} - /// | ^ pattern `B` not covered + /// LL | match Bar::A { + /// | ^ pattern `Bar::B` not covered /// | /// note: the lint level is defined here /// --> $DIR/reachable-patterns.rs:69:16 /// | /// LL | #[warn(non_exhaustive_omitted_patterns)] /// | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - /// = help: ensure that all possible cases are being handled by adding the suggested match arms + /// = help: ensure that all variants are matched explicitly by adding the suggested match arms /// = note: the matched value is of type `Bar` and the `non_exhaustive_omitted_patterns` attribute was found /// ``` /// + /// Warning: setting this to `deny` will make upstream non-breaking changes (adding fields or + /// variants to a `#[non_exhaustive]` struct or enum) break your crate. This goes against + /// expected semver behavior. + /// /// ### Explanation /// - /// Structs and enums tagged with `#[non_exhaustive]` force the user to add a - /// (potentially redundant) wildcard when pattern-matching, to allow for future - /// addition of fields or variants. The `non_exhaustive_omitted_patterns` lint - /// detects when such a wildcard happens to actually catch some fields/variants. - /// In other words, when the match without the wildcard would not be exhaustive. - /// This lets the user be informed if new fields/variants were added. + /// Structs and enums tagged with `#[non_exhaustive]` force the user to add a (potentially + /// redundant) wildcard when pattern-matching, to allow for future addition of fields or + /// variants. The `non_exhaustive_omitted_patterns` lint detects when such a wildcard happens to + /// actually catch some fields/variants. In other words, when the match without the wildcard + /// would not be exhaustive. This lets the user be informed if new fields/variants were added. pub NON_EXHAUSTIVE_OMITTED_PATTERNS, Allow, "detect when patterns of types marked `non_exhaustive` are missed", diff --git a/compiler/rustc_mir_build/src/thir/pattern/check_match.rs b/compiler/rustc_mir_build/src/thir/pattern/check_match.rs index f3568b682a4b4..a9901b9b9bf00 100644 --- a/compiler/rustc_mir_build/src/thir/pattern/check_match.rs +++ b/compiler/rustc_mir_build/src/thir/pattern/check_match.rs @@ -269,7 +269,7 @@ impl<'p, 'tcx> MatchVisitor<'_, 'p, 'tcx> { let scrut = &self.thir[scrut]; let scrut_ty = scrut.ty; - let report = compute_match_usefulness(&cx, &tarms, self.lint_level, scrut_ty); + let report = compute_match_usefulness(&cx, &tarms, self.lint_level, scrut_ty, scrut.span); match source { // Don't report arm reachability of desugared `match $iter.into_iter() { iter => .. }` @@ -431,7 +431,7 @@ impl<'p, 'tcx> MatchVisitor<'_, 'p, 'tcx> { let pattern = self.lower_pattern(&mut cx, pat); let pattern_ty = pattern.ty(); let arm = MatchArm { pat: pattern, hir_id: self.lint_level, has_guard: false }; - let report = compute_match_usefulness(&cx, &[arm], self.lint_level, pattern_ty); + let report = compute_match_usefulness(&cx, &[arm], self.lint_level, pattern_ty, pattern.span()); // Note: we ignore whether the pattern is unreachable (i.e. whether the type is empty). We // only care about exhaustiveness here. @@ -622,7 +622,7 @@ fn is_let_irrefutable<'p, 'tcx>( pat: &'p DeconstructedPat<'p, 'tcx>, ) -> bool { let arms = [MatchArm { pat, hir_id: pat_id, has_guard: false }]; - let report = compute_match_usefulness(&cx, &arms, pat_id, pat.ty()); + let report = compute_match_usefulness(&cx, &arms, pat_id, pat.ty(), pat.span()); // Report if the pattern is unreachable, which can only occur when the type is uninhabited. // This also reports unreachable sub-patterns though, so we can't just replace it with an diff --git a/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs b/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs index 818a8ff27c81e..359e5333fb90a 100644 --- a/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs +++ b/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs @@ -629,18 +629,11 @@ pub(super) enum Constructor<'tcx> { /// `#[doc(hidden)]` ones. Hidden, /// Fake extra constructor for constructors that are not seen in the matrix, as explained in the - /// code for [`Constructor::split`]. The carried `bool` is used for the - /// `non_exhaustive_omitted_patterns` lint. - Missing { - nonexhaustive_enum_missing_visible_variants: bool, - }, + /// code for [`Constructor::split`]. + Missing, } impl<'tcx> Constructor<'tcx> { - pub(super) fn is_wildcard(&self) -> bool { - matches!(self, Wildcard) - } - pub(super) fn is_non_exhaustive(&self) -> bool { matches!(self, NonExhaustive) } @@ -778,14 +771,8 @@ impl<'tcx> Constructor<'tcx> { let all_missing = split_set.present.is_empty(); let report_when_all_missing = pcx.is_top_level && !IntRange::is_integral(pcx.ty); - let ctor = if all_missing && !report_when_all_missing { - Wildcard - } else { - Missing { - nonexhaustive_enum_missing_visible_variants: split_set - .nonexhaustive_enum_missing_visible_variants, - } - }; + let ctor = + if all_missing && !report_when_all_missing { Wildcard } else { Missing }; smallvec![ctor] } else { split_set.present @@ -905,11 +892,9 @@ pub(super) enum ConstructorSet { /// either fully included in or disjoint from each constructor in the column. This avoids /// non-trivial intersections like between `0..10` and `5..15`. #[derive(Debug)] -struct SplitConstructorSet<'tcx> { - present: SmallVec<[Constructor<'tcx>; 1]>, - missing: Vec>, - /// For the `non_exhaustive_omitted_patterns` lint. - nonexhaustive_enum_missing_visible_variants: bool, +pub(super) struct SplitConstructorSet<'tcx> { + pub(super) present: SmallVec<[Constructor<'tcx>; 1]>, + pub(super) missing: Vec>, } impl ConstructorSet { @@ -1039,7 +1024,7 @@ impl ConstructorSet { /// constructors to 1/ determine which constructors of the type (if any) are missing; 2/ split /// constructors to handle non-trivial intersections e.g. on ranges or slices. #[instrument(level = "debug", skip(self, pcx, ctors), ret)] - fn split<'a, 'tcx>( + pub(super) fn split<'a, 'tcx>( &self, pcx: &PatCtxt<'_, '_, 'tcx>, ctors: impl Iterator> + Clone, @@ -1051,7 +1036,6 @@ impl ConstructorSet { let mut missing = Vec::new(); // Constructors in `ctors`, except wildcards. let mut seen = ctors.filter(|c| !(matches!(c, Opaque | Wildcard))); - let mut nonexhaustive_enum_missing_visible_variants = false; match self { ConstructorSet::Single => { if seen.next().is_none() { @@ -1063,6 +1047,7 @@ impl ConstructorSet { ConstructorSet::Variants { visible_variants, hidden_variants, non_exhaustive } => { let seen_set: FxHashSet<_> = seen.map(|c| c.as_variant().unwrap()).collect(); let mut skipped_a_hidden_variant = false; + for variant in visible_variants { let ctor = Variant(*variant); if seen_set.contains(&variant) { @@ -1071,8 +1056,6 @@ impl ConstructorSet { missing.push(ctor); } } - nonexhaustive_enum_missing_visible_variants = - *non_exhaustive && !missing.is_empty(); for variant in hidden_variants { let ctor = Variant(*variant); @@ -1159,7 +1142,7 @@ impl ConstructorSet { ConstructorSet::Uninhabited => {} } - SplitConstructorSet { present, missing, nonexhaustive_enum_missing_visible_variants } + SplitConstructorSet { present, missing } } /// Compute the set of constructors missing from this column. @@ -1519,6 +1502,13 @@ impl<'p, 'tcx> DeconstructedPat<'p, 'tcx> { pub(super) fn is_or_pat(&self) -> bool { matches!(self.ctor, Or) } + pub(super) fn flatten_or_pat(&'p self) -> SmallVec<[&'p Self; 1]> { + if self.is_or_pat() { + self.iter_fields().flat_map(|p| p.flatten_or_pat()).collect() + } else { + smallvec![self] + } + } pub(super) fn ctor(&self) -> &Constructor<'tcx> { &self.ctor @@ -1704,7 +1694,7 @@ impl<'p, 'tcx> fmt::Debug for DeconstructedPat<'p, 'tcx> { #[derive(Debug, Clone)] pub(crate) struct WitnessPat<'tcx> { ctor: Constructor<'tcx>, - fields: Vec>, + pub(crate) fields: Vec>, ty: Ty<'tcx>, } diff --git a/compiler/rustc_mir_build/src/thir/pattern/usefulness.rs b/compiler/rustc_mir_build/src/thir/pattern/usefulness.rs index 3c54bc9586db7..b2ce238aee225 100644 --- a/compiler/rustc_mir_build/src/thir/pattern/usefulness.rs +++ b/compiler/rustc_mir_build/src/thir/pattern/usefulness.rs @@ -844,8 +844,6 @@ fn is_useful<'p, 'tcx>( } // We split the head constructor of `v`. let split_ctors = v_ctor.split(pcx, matrix.heads().map(DeconstructedPat::ctor)); - let is_non_exhaustive_and_wild = - cx.is_foreign_non_exhaustive_enum(ty) && v_ctor.is_wildcard(); // For each constructor, we compute whether there's a value that starts with it that would // witness the usefulness of `v`. let start_matrix = &matrix; @@ -866,50 +864,6 @@ fn is_useful<'p, 'tcx>( ) }); let usefulness = usefulness.apply_constructor(pcx, start_matrix, &ctor); - - // When all the conditions are met we have a match with a `non_exhaustive` enum - // that has the potential to trigger the `non_exhaustive_omitted_patterns` lint. - // To understand the workings checkout `Constructor::split` and `SplitWildcard::new/into_ctors` - if is_non_exhaustive_and_wild - // Only emit a lint on refutable patterns. - && cx.refutable - // We check that the match has a wildcard pattern and that wildcard is useful, - // meaning there are variants that are covered by the wildcard. Without the check - // for `witness_preference` the lint would trigger on `if let NonExhaustiveEnum::A = foo {}` - && usefulness.is_useful() && matches!(witness_preference, RealArm) - && matches!( - &ctor, - Constructor::Missing { nonexhaustive_enum_missing_visible_variants: true } - ) - { - let missing = ConstructorSet::for_ty(pcx.cx, pcx.ty) - .compute_missing(pcx, matrix.heads().map(DeconstructedPat::ctor)); - // Construct for each missing constructor a "wild" version of this constructor, that - // matches everything that can be built with it. For example, if `ctor` is a - // `Constructor::Variant` for `Option::Some`, we get the pattern `Some(_)`. - let patterns = missing - .into_iter() - // Because of how we computed `nonexhaustive_enum_missing_visible_variants`, - // this will not return an empty `Vec`. - .filter(|c| !(matches!(c, Constructor::NonExhaustive | Constructor::Hidden))) - .map(|missing_ctor| WitnessPat::wild_from_ctor(pcx, missing_ctor)) - .collect::>(); - - // Report that a match of a `non_exhaustive` enum marked with `non_exhaustive_omitted_patterns` - // is not exhaustive enough. - // - // NB: The partner lint for structs lives in `compiler/rustc_hir_analysis/src/check/pat.rs`. - cx.tcx.emit_spanned_lint( - NON_EXHAUSTIVE_OMITTED_PATTERNS, - lint_root, - pcx.span, - NonExhaustiveOmittedPattern { - scrut_ty: pcx.ty, - uncovered: Uncovered::new(pcx.span, pcx.cx, patterns), - }, - ); - } - ret.extend(usefulness); } } @@ -921,6 +875,74 @@ fn is_useful<'p, 'tcx>( ret } +/// Traverse the patterns to collect any variants of a non_exhaustive enum that fail to be mentioned +/// in a given column. This traverses patterns column-by-column, where a column is the intuitive +/// notion of "subpatterns that inspect the same subvalue". +/// Despite similarities with `is_useful`, this traversal is different. Notably this is linear in the +/// depth of patterns, whereas `is_useful` is worst-case exponential (exhaustiveness is NP-complete). +fn collect_nonexhaustive_missing_variants<'p, 'tcx>( + cx: &MatchCheckCtxt<'p, 'tcx>, + column: &[&DeconstructedPat<'p, 'tcx>], +) -> Vec> { + let ty = column[0].ty(); + let pcx = &PatCtxt { cx, ty, span: DUMMY_SP, is_top_level: false }; + + let mut witnesses = Vec::new(); + + let set = ConstructorSet::for_ty(pcx.cx, pcx.ty).split(pcx, column.iter().map(|p| p.ctor())); + if cx.is_foreign_non_exhaustive_enum(ty) { + witnesses.extend( + set.missing + .into_iter() + // This will list missing visible variants. + .filter(|c| !matches!(c, Constructor::Hidden | Constructor::NonExhaustive)) + .map(|missing_ctor| WitnessPat::wild_from_ctor(pcx, missing_ctor)), + ) + } + + // Recurse into the fields. + for ctor in set.present { + let arity = ctor.arity(pcx); + if arity == 0 { + continue; + } + + // We specialize the column by `ctor`. This gives us `arity`-many columns of patterns. These + // columns may have different lengths in the presence of or-patterns (this is why we can't + // reuse `Matrix`). + let mut specialized_columns: Vec> = (0..arity).map(|_| Vec::new()).collect(); + let relevant_patterns = column.iter().filter(|pat| ctor.is_covered_by(pcx, pat.ctor())); + for pat in relevant_patterns { + let specialized = pat.specialize(pcx, &ctor); + for (subpat, sub_column) in specialized.iter().zip(&mut specialized_columns) { + if subpat.is_or_pat() { + sub_column.extend(subpat.iter_fields()) + } else { + sub_column.push(subpat) + } + } + } + debug_assert!( + !specialized_columns[0].is_empty(), + "ctor {ctor:?} was listed as present but isn't" + ); + + let wild_pat = WitnessPat::wild_from_ctor(pcx, ctor); + for (i, col_i) in specialized_columns.iter().enumerate() { + // Compute witnesses for each column. + let wits_for_col_i = collect_nonexhaustive_missing_variants(cx, col_i.as_slice()); + // For each witness, we build a new pattern in the shape of `ctor(_, _, wit, _, _)`, + // adding enough wildcards to match `arity`. + for wit in wits_for_col_i { + let mut pat = wild_pat.clone(); + pat.fields[i] = wit; + witnesses.push(pat); + } + } + } + witnesses +} + /// The arm of a match expression. #[derive(Clone, Copy, Debug)] pub(crate) struct MatchArm<'p, 'tcx> { @@ -961,6 +983,7 @@ pub(crate) fn compute_match_usefulness<'p, 'tcx>( arms: &[MatchArm<'p, 'tcx>], lint_root: HirId, scrut_ty: Ty<'tcx>, + scrut_span: Span, ) -> UsefulnessReport<'p, 'tcx> { let mut matrix = Matrix::empty(); let arm_usefulness: Vec<_> = arms @@ -985,9 +1008,39 @@ pub(crate) fn compute_match_usefulness<'p, 'tcx>( let wild_pattern = cx.pattern_arena.alloc(DeconstructedPat::wildcard(scrut_ty, DUMMY_SP)); let v = PatStack::from_pattern(wild_pattern); let usefulness = is_useful(cx, &matrix, &v, FakeExtraWildcard, lint_root, false, true); - let non_exhaustiveness_witnesses = match usefulness { + let non_exhaustiveness_witnesses: Vec<_> = match usefulness { WithWitnesses(pats) => pats.into_iter().map(|w| w.single_pattern()).collect(), NoWitnesses { .. } => bug!(), }; + + // Run the non_exhaustive_omitted_patterns lint. Only run on refutable patterns to avoid hitting + // `if let`s. Only run if the match is exhaustive otherwise the error is redundant. + if cx.refutable + && non_exhaustiveness_witnesses.is_empty() + && !matches!( + cx.tcx.lint_level_at_node(NON_EXHAUSTIVE_OMITTED_PATTERNS, lint_root).0, + rustc_session::lint::Level::Allow + ) + { + let pat_column = arms.iter().flat_map(|arm| arm.pat.flatten_or_pat()).collect::>(); + let witnesses = collect_nonexhaustive_missing_variants(cx, &pat_column); + + if !witnesses.is_empty() { + // Report that a match of a `non_exhaustive` enum marked with `non_exhaustive_omitted_patterns` + // is not exhaustive enough. + // + // NB: The partner lint for structs lives in `compiler/rustc_hir_analysis/src/check/pat.rs`. + cx.tcx.emit_spanned_lint( + NON_EXHAUSTIVE_OMITTED_PATTERNS, + lint_root, + scrut_span, + NonExhaustiveOmittedPattern { + scrut_ty, + uncovered: Uncovered::new(scrut_span, cx, witnesses), + }, + ); + } + } + UsefulnessReport { arm_usefulness, non_exhaustiveness_witnesses } } diff --git a/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.rs b/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.rs index 240dd90f70dc7..1922bfb4913e4 100644 --- a/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.rs +++ b/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.rs @@ -3,9 +3,11 @@ #![deny(non_exhaustive_omitted_patterns)] //~^ WARNING unknown lint: `non_exhaustive_omitted_patterns` //~| WARNING unknown lint: `non_exhaustive_omitted_patterns` +//~| WARNING unknown lint: `non_exhaustive_omitted_patterns` #![allow(non_exhaustive_omitted_patterns)] //~^ WARNING unknown lint: `non_exhaustive_omitted_patterns` //~| WARNING unknown lint: `non_exhaustive_omitted_patterns` +//~| WARNING unknown lint: `non_exhaustive_omitted_patterns` fn main() { enum Foo { @@ -19,17 +21,19 @@ fn main() { //~| WARNING unknown lint: `non_exhaustive_omitted_patterns` //~| WARNING unknown lint: `non_exhaustive_omitted_patterns` //~| WARNING unknown lint: `non_exhaustive_omitted_patterns` + //~| WARNING unknown lint: `non_exhaustive_omitted_patterns` match Foo::A { + //~^ ERROR non-exhaustive patterns: `Foo::C` not covered Foo::A => {} Foo::B => {} } - //~^^^^ ERROR non-exhaustive patterns: `Foo::C` not covered #[warn(non_exhaustive_omitted_patterns)] //~^ WARNING unknown lint: `non_exhaustive_omitted_patterns` //~| WARNING unknown lint: `non_exhaustive_omitted_patterns` //~| WARNING unknown lint: `non_exhaustive_omitted_patterns` //~| WARNING unknown lint: `non_exhaustive_omitted_patterns` + //~| WARNING unknown lint: `non_exhaustive_omitted_patterns` match Foo::A { Foo::A => {} Foo::B => {} diff --git a/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.stderr b/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.stderr index 22e5481929f5c..eb61c4cf159ab 100644 --- a/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.stderr +++ b/tests/ui/feature-gates/feature-gate-non_exhaustive_omitted_patterns_lint.stderr @@ -10,7 +10,7 @@ LL | #![deny(non_exhaustive_omitted_patterns)] = note: `#[warn(unknown_lints)]` on by default warning: unknown lint: `non_exhaustive_omitted_patterns` - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:6:1 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:7:1 | LL | #![allow(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -20,7 +20,7 @@ LL | #![allow(non_exhaustive_omitted_patterns)] = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable warning: unknown lint: `non_exhaustive_omitted_patterns` - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:17:5 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:19:5 | LL | #[allow(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -30,7 +30,7 @@ LL | #[allow(non_exhaustive_omitted_patterns)] = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable warning: unknown lint: `non_exhaustive_omitted_patterns` - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:17:5 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:19:5 | LL | #[allow(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -41,7 +41,7 @@ LL | #[allow(non_exhaustive_omitted_patterns)] = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` warning: unknown lint: `non_exhaustive_omitted_patterns` - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:28:5 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:31:5 | LL | #[warn(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -51,7 +51,7 @@ LL | #[warn(non_exhaustive_omitted_patterns)] = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable warning: unknown lint: `non_exhaustive_omitted_patterns` - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:28:5 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:31:5 | LL | #[warn(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -73,7 +73,7 @@ LL | #![deny(non_exhaustive_omitted_patterns)] = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` warning: unknown lint: `non_exhaustive_omitted_patterns` - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:6:1 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:7:1 | LL | #![allow(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -84,7 +84,7 @@ LL | #![allow(non_exhaustive_omitted_patterns)] = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` warning: unknown lint: `non_exhaustive_omitted_patterns` - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:17:5 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:19:5 | LL | #[allow(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -95,7 +95,7 @@ LL | #[allow(non_exhaustive_omitted_patterns)] = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` warning: unknown lint: `non_exhaustive_omitted_patterns` - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:17:5 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:19:5 | LL | #[allow(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -106,7 +106,7 @@ LL | #[allow(non_exhaustive_omitted_patterns)] = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` warning: unknown lint: `non_exhaustive_omitted_patterns` - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:28:5 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:31:5 | LL | #[warn(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -117,7 +117,7 @@ LL | #[warn(non_exhaustive_omitted_patterns)] = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` warning: unknown lint: `non_exhaustive_omitted_patterns` - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:28:5 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:31:5 | LL | #[warn(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -128,13 +128,13 @@ LL | #[warn(non_exhaustive_omitted_patterns)] = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error[E0004]: non-exhaustive patterns: `Foo::C` not covered - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:22:11 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:25:11 | LL | match Foo::A { | ^^^^^^ pattern `Foo::C` not covered | note: `Foo` defined here - --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:14:9 + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:16:9 | LL | enum Foo { | --- @@ -148,6 +148,50 @@ LL ~ Foo::B => {}, LL + Foo::C => todo!() | -error: aborting due to previous error; 12 warnings emitted +warning: unknown lint: `non_exhaustive_omitted_patterns` + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:3:1 + | +LL | #![deny(non_exhaustive_omitted_patterns)] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: the `non_exhaustive_omitted_patterns` lint is unstable + = note: see issue #89554 for more information + = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` + +warning: unknown lint: `non_exhaustive_omitted_patterns` + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:7:1 + | +LL | #![allow(non_exhaustive_omitted_patterns)] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: the `non_exhaustive_omitted_patterns` lint is unstable + = note: see issue #89554 for more information + = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` + +warning: unknown lint: `non_exhaustive_omitted_patterns` + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:19:5 + | +LL | #[allow(non_exhaustive_omitted_patterns)] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: the `non_exhaustive_omitted_patterns` lint is unstable + = note: see issue #89554 for more information + = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` + +warning: unknown lint: `non_exhaustive_omitted_patterns` + --> $DIR/feature-gate-non_exhaustive_omitted_patterns_lint.rs:31:5 + | +LL | #[warn(non_exhaustive_omitted_patterns)] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: the `non_exhaustive_omitted_patterns` lint is unstable + = note: see issue #89554 for more information + = help: add `#![feature(non_exhaustive_omitted_patterns_lint)]` to the crate attributes to enable + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` + +error: aborting due to previous error; 16 warnings emitted For more information about this error, try `rustc --explain E0004`. diff --git a/tests/ui/rfcs/rfc-2008-non-exhaustive/omitted-patterns.rs b/tests/ui/rfcs/rfc-2008-non-exhaustive/omitted-patterns.rs index ff9b1996c3d85..34d0d44a86d22 100644 --- a/tests/ui/rfcs/rfc-2008-non-exhaustive/omitted-patterns.rs +++ b/tests/ui/rfcs/rfc-2008-non-exhaustive/omitted-patterns.rs @@ -53,18 +53,18 @@ fn main() { #[deny(non_exhaustive_omitted_patterns)] match non_enum { + //~^ some variants are not matched explicitly NonExhaustiveEnum::Unit => {} NonExhaustiveEnum::Tuple(_) => {} _ => {} } - //~^^ some variants are not matched explicitly #[deny(non_exhaustive_omitted_patterns)] match non_enum { + //~^ some variants are not matched explicitly NonExhaustiveEnum::Unit | NonExhaustiveEnum::Struct { .. } => {} _ => {} } - //~^^ some variants are not matched explicitly let x = 5; #[deny(non_exhaustive_omitted_patterns)] @@ -74,7 +74,6 @@ fn main() { NonExhaustiveEnum::Struct { .. } => {} _ => {} } - //~^^ some variants are not matched explicitly #[deny(non_exhaustive_omitted_patterns)] match (non_enum, true) { @@ -84,7 +83,6 @@ fn main() { _ => {} } - // FIXME(Nadrieril): asymmetrical behavior #[deny(non_exhaustive_omitted_patterns)] match (true, non_enum) { (true, NonExhaustiveEnum::Unit) => {} @@ -92,12 +90,10 @@ fn main() { (false, NonExhaustiveEnum::Struct { .. }) => {} _ => {} } - //~^^ some variants are not matched explicitly - //~| some variants are not matched explicitly - // FIXME(Nadrieril): we should detect this #[deny(non_exhaustive_omitted_patterns)] match Some(non_enum) { + //~^ some variants are not matched explicitly Some(NonExhaustiveEnum::Unit) => {} Some(NonExhaustiveEnum::Tuple(_)) => {} _ => {} @@ -115,13 +111,12 @@ fn main() { #[deny(non_exhaustive_omitted_patterns)] match NestedNonExhaustive::B { + //~^ some variants are not matched explicitly NestedNonExhaustive::A(NonExhaustiveEnum::Unit) => {} NestedNonExhaustive::A(_) => {} NestedNonExhaustive::B => {} _ => {} } - //~^^ some variants are not matched explicitly - //~^^^^^ some variants are not matched explicitly #[warn(non_exhaustive_omitted_patterns)] match VariantNonExhaustive::Baz(1, 2) { @@ -156,9 +151,9 @@ fn main() { #[deny(non_exhaustive_omitted_patterns)] match NonExhaustiveSingleVariant::A(true) { + //~^ some variants are not matched explicitly _ => {} } - //~^^ some variants are not matched explicitly // Ok: we don't lint on `if let` expressions #[deny(non_exhaustive_omitted_patterns)] @@ -166,11 +161,11 @@ fn main() { #[deny(non_exhaustive_omitted_patterns)] match UnstableEnum::Stable { + //~^ some variants are not matched explicitly UnstableEnum::Stable => {} UnstableEnum::Stable2 => {} _ => {} } - //~^^ some variants are not matched explicitly // Ok: the feature is on and all variants are matched #[deny(non_exhaustive_omitted_patterns)] @@ -191,10 +186,10 @@ fn main() { #[deny(non_exhaustive_omitted_patterns)] match OnlyUnstableEnum::Unstable { + //~^ some variants are not matched explicitly OnlyUnstableEnum::Unstable => {} _ => {} } - //~^^ some variants are not matched explicitly #[warn(non_exhaustive_omitted_patterns)] let OnlyUnstableStruct { unstable, .. } = OnlyUnstableStruct::new(); @@ -221,14 +216,13 @@ fn main() { let local_refutable @ NonExhaustiveEnum::Unit = NonExhaustiveEnum::Unit; //~^ refutable pattern in local binding - // Check that matching on a reference results in a correctly spanned diagnostic #[deny(non_exhaustive_omitted_patterns)] match &non_enum { + //~^ some variants are not matched explicitly NonExhaustiveEnum::Unit => {} NonExhaustiveEnum::Tuple(_) => {} _ => {} } - //~^^ some variants are not matched explicitly } #[deny(non_exhaustive_omitted_patterns)] diff --git a/tests/ui/rfcs/rfc-2008-non-exhaustive/omitted-patterns.stderr b/tests/ui/rfcs/rfc-2008-non-exhaustive/omitted-patterns.stderr index e8011f9c3d848..1d65d1fabfaf6 100644 --- a/tests/ui/rfcs/rfc-2008-non-exhaustive/omitted-patterns.stderr +++ b/tests/ui/rfcs/rfc-2008-non-exhaustive/omitted-patterns.stderr @@ -1,5 +1,5 @@ warning: some fields are not explicitly listed - --> $DIR/omitted-patterns.rs:129:9 + --> $DIR/omitted-patterns.rs:124:9 | LL | VariantNonExhaustive::Bar { x, .. } => {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `y` not listed @@ -7,13 +7,13 @@ LL | VariantNonExhaustive::Bar { x, .. } => {} = help: ensure that all fields are mentioned explicitly by adding the suggested fields = note: the pattern is of type `VariantNonExhaustive` and the `non_exhaustive_omitted_patterns` attribute was found note: the lint level is defined here - --> $DIR/omitted-patterns.rs:126:12 + --> $DIR/omitted-patterns.rs:121:12 | LL | #[warn(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ warning: some fields are not explicitly listed - --> $DIR/omitted-patterns.rs:134:9 + --> $DIR/omitted-patterns.rs:129:9 | LL | let FunctionalRecord { first_field, second_field, .. } = FunctionalRecord::default(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `third_field` not listed @@ -21,13 +21,13 @@ LL | let FunctionalRecord { first_field, second_field, .. } = FunctionalReco = help: ensure that all fields are mentioned explicitly by adding the suggested fields = note: the pattern is of type `FunctionalRecord` and the `non_exhaustive_omitted_patterns` attribute was found note: the lint level is defined here - --> $DIR/omitted-patterns.rs:133:12 + --> $DIR/omitted-patterns.rs:128:12 | LL | #[warn(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ warning: some fields are not explicitly listed - --> $DIR/omitted-patterns.rs:142:29 + --> $DIR/omitted-patterns.rs:137:29 | LL | let NestedStruct { bar: NormalStruct { first_field, .. }, .. } = NestedStruct::default(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `second_field` not listed @@ -35,13 +35,13 @@ LL | let NestedStruct { bar: NormalStruct { first_field, .. }, .. } = Nested = help: ensure that all fields are mentioned explicitly by adding the suggested fields = note: the pattern is of type `NormalStruct` and the `non_exhaustive_omitted_patterns` attribute was found note: the lint level is defined here - --> $DIR/omitted-patterns.rs:141:12 + --> $DIR/omitted-patterns.rs:136:12 | LL | #[warn(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ warning: some fields are not explicitly listed - --> $DIR/omitted-patterns.rs:142:9 + --> $DIR/omitted-patterns.rs:137:9 | LL | let NestedStruct { bar: NormalStruct { first_field, .. }, .. } = NestedStruct::default(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `foo` not listed @@ -50,7 +50,7 @@ LL | let NestedStruct { bar: NormalStruct { first_field, .. }, .. } = Nested = note: the pattern is of type `NestedStruct` and the `non_exhaustive_omitted_patterns` attribute was found warning: some fields are not explicitly listed - --> $DIR/omitted-patterns.rs:200:9 + --> $DIR/omitted-patterns.rs:195:9 | LL | let OnlyUnstableStruct { unstable, .. } = OnlyUnstableStruct::new(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `unstable2` not listed @@ -58,13 +58,13 @@ LL | let OnlyUnstableStruct { unstable, .. } = OnlyUnstableStruct::new(); = help: ensure that all fields are mentioned explicitly by adding the suggested fields = note: the pattern is of type `OnlyUnstableStruct` and the `non_exhaustive_omitted_patterns` attribute was found note: the lint level is defined here - --> $DIR/omitted-patterns.rs:199:12 + --> $DIR/omitted-patterns.rs:194:12 | LL | #[warn(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ warning: some fields are not explicitly listed - --> $DIR/omitted-patterns.rs:208:9 + --> $DIR/omitted-patterns.rs:203:9 | LL | let UnstableStruct { stable, stable2, .. } = UnstableStruct::default(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `unstable` not listed @@ -72,16 +72,16 @@ LL | let UnstableStruct { stable, stable2, .. } = UnstableStruct::default(); = help: ensure that all fields are mentioned explicitly by adding the suggested fields = note: the pattern is of type `UnstableStruct` and the `non_exhaustive_omitted_patterns` attribute was found note: the lint level is defined here - --> $DIR/omitted-patterns.rs:207:12 + --> $DIR/omitted-patterns.rs:202:12 | LL | #[warn(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: some variants are not matched explicitly - --> $DIR/omitted-patterns.rs:58:9 + --> $DIR/omitted-patterns.rs:55:11 | -LL | _ => {} - | ^ pattern `NonExhaustiveEnum::Struct { .. }` not covered +LL | match non_enum { + | ^^^^^^^^ pattern `NonExhaustiveEnum::Struct { .. }` not covered | = help: ensure that all variants are matched explicitly by adding the suggested match arms = note: the matched value is of type `NonExhaustiveEnum` and the `non_exhaustive_omitted_patterns` attribute was found @@ -92,10 +92,10 @@ LL | #[deny(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: some variants are not matched explicitly - --> $DIR/omitted-patterns.rs:65:9 + --> $DIR/omitted-patterns.rs:63:11 | -LL | _ => {} - | ^ pattern `NonExhaustiveEnum::Tuple(_)` not covered +LL | match non_enum { + | ^^^^^^^^ pattern `NonExhaustiveEnum::Tuple(_)` not covered | = help: ensure that all variants are matched explicitly by adding the suggested match arms = note: the matched value is of type `NonExhaustiveEnum` and the `non_exhaustive_omitted_patterns` attribute was found @@ -106,109 +106,77 @@ LL | #[deny(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: some variants are not matched explicitly - --> $DIR/omitted-patterns.rs:75:9 + --> $DIR/omitted-patterns.rs:95:11 | -LL | _ => {} - | ^ pattern `NonExhaustiveEnum::Unit` not covered +LL | match Some(non_enum) { + | ^^^^^^^^^^^^^^ pattern `Some(NonExhaustiveEnum::Struct { .. })` not covered | = help: ensure that all variants are matched explicitly by adding the suggested match arms - = note: the matched value is of type `NonExhaustiveEnum` and the `non_exhaustive_omitted_patterns` attribute was found + = note: the matched value is of type `Option` and the `non_exhaustive_omitted_patterns` attribute was found note: the lint level is defined here - --> $DIR/omitted-patterns.rs:70:12 + --> $DIR/omitted-patterns.rs:94:12 | LL | #[deny(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: some variants are not matched explicitly - --> $DIR/omitted-patterns.rs:93:9 - | -LL | _ => {} - | ^ pattern `NonExhaustiveEnum::Unit` not covered - | - = help: ensure that all variants are matched explicitly by adding the suggested match arms - = note: the matched value is of type `NonExhaustiveEnum` and the `non_exhaustive_omitted_patterns` attribute was found -note: the lint level is defined here - --> $DIR/omitted-patterns.rs:88:12 - | -LL | #[deny(non_exhaustive_omitted_patterns)] - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -error: some variants are not matched explicitly - --> $DIR/omitted-patterns.rs:93:9 - | -LL | _ => {} - | ^ patterns `NonExhaustiveEnum::Tuple(_)` and `NonExhaustiveEnum::Struct { .. }` not covered - | - = help: ensure that all variants are matched explicitly by adding the suggested match arms - = note: the matched value is of type `NonExhaustiveEnum` and the `non_exhaustive_omitted_patterns` attribute was found - -error: some variants are not matched explicitly - --> $DIR/omitted-patterns.rs:119:32 + --> $DIR/omitted-patterns.rs:113:11 | -LL | NestedNonExhaustive::A(_) => {} - | ^ patterns `NonExhaustiveEnum::Tuple(_)` and `NonExhaustiveEnum::Struct { .. }` not covered +LL | match NestedNonExhaustive::B { + | ^^^^^^^^^^^^^^^^^^^^^^ patterns `NestedNonExhaustive::C`, `NestedNonExhaustive::A(NonExhaustiveEnum::Tuple(_))` and `NestedNonExhaustive::A(NonExhaustiveEnum::Struct { .. })` not covered | = help: ensure that all variants are matched explicitly by adding the suggested match arms - = note: the matched value is of type `NonExhaustiveEnum` and the `non_exhaustive_omitted_patterns` attribute was found + = note: the matched value is of type `NestedNonExhaustive` and the `non_exhaustive_omitted_patterns` attribute was found note: the lint level is defined here - --> $DIR/omitted-patterns.rs:116:12 + --> $DIR/omitted-patterns.rs:112:12 | LL | #[deny(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: some variants are not matched explicitly - --> $DIR/omitted-patterns.rs:121:9 + --> $DIR/omitted-patterns.rs:153:11 | -LL | _ => {} - | ^ pattern `NestedNonExhaustive::C` not covered - | - = help: ensure that all variants are matched explicitly by adding the suggested match arms - = note: the matched value is of type `NestedNonExhaustive` and the `non_exhaustive_omitted_patterns` attribute was found - -error: some variants are not matched explicitly - --> $DIR/omitted-patterns.rs:159:9 - | -LL | _ => {} - | ^ pattern `NonExhaustiveSingleVariant::A(_)` not covered +LL | match NonExhaustiveSingleVariant::A(true) { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ pattern `NonExhaustiveSingleVariant::A(_)` not covered | = help: ensure that all variants are matched explicitly by adding the suggested match arms = note: the matched value is of type `NonExhaustiveSingleVariant` and the `non_exhaustive_omitted_patterns` attribute was found note: the lint level is defined here - --> $DIR/omitted-patterns.rs:157:12 + --> $DIR/omitted-patterns.rs:152:12 | LL | #[deny(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: some variants are not matched explicitly - --> $DIR/omitted-patterns.rs:171:9 + --> $DIR/omitted-patterns.rs:163:11 | -LL | _ => {} - | ^ pattern `UnstableEnum::Unstable` not covered +LL | match UnstableEnum::Stable { + | ^^^^^^^^^^^^^^^^^^^^ pattern `UnstableEnum::Unstable` not covered | = help: ensure that all variants are matched explicitly by adding the suggested match arms = note: the matched value is of type `UnstableEnum` and the `non_exhaustive_omitted_patterns` attribute was found note: the lint level is defined here - --> $DIR/omitted-patterns.rs:167:12 + --> $DIR/omitted-patterns.rs:162:12 | LL | #[deny(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: some variants are not matched explicitly - --> $DIR/omitted-patterns.rs:195:9 + --> $DIR/omitted-patterns.rs:188:11 | -LL | _ => {} - | ^ pattern `OnlyUnstableEnum::Unstable2` not covered +LL | match OnlyUnstableEnum::Unstable { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^ pattern `OnlyUnstableEnum::Unstable2` not covered | = help: ensure that all variants are matched explicitly by adding the suggested match arms = note: the matched value is of type `OnlyUnstableEnum` and the `non_exhaustive_omitted_patterns` attribute was found note: the lint level is defined here - --> $DIR/omitted-patterns.rs:192:12 + --> $DIR/omitted-patterns.rs:187:12 | LL | #[deny(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error[E0005]: refutable pattern in local binding - --> $DIR/omitted-patterns.rs:221:9 + --> $DIR/omitted-patterns.rs:216:9 | LL | let local_refutable @ NonExhaustiveEnum::Unit = NonExhaustiveEnum::Unit; | ^^^^^^^^^^^^^^^ pattern `_` not covered @@ -222,19 +190,19 @@ LL | let local_refutable @ NonExhaustiveEnum::Unit = NonExhaustiveEnum::Unit | ++++++++++++++++ error: some variants are not matched explicitly - --> $DIR/omitted-patterns.rs:229:9 + --> $DIR/omitted-patterns.rs:220:11 | -LL | _ => {} - | ^ pattern `NonExhaustiveEnum::Struct { .. }` not covered +LL | match &non_enum { + | ^^^^^^^^^ pattern `&NonExhaustiveEnum::Struct { .. }` not covered | = help: ensure that all variants are matched explicitly by adding the suggested match arms - = note: the matched value is of type `NonExhaustiveEnum` and the `non_exhaustive_omitted_patterns` attribute was found + = note: the matched value is of type `&NonExhaustiveEnum` and the `non_exhaustive_omitted_patterns` attribute was found note: the lint level is defined here - --> $DIR/omitted-patterns.rs:225:12 + --> $DIR/omitted-patterns.rs:219:12 | LL | #[deny(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -error: aborting due to 12 previous errors; 6 warnings emitted +error: aborting due to 9 previous errors; 6 warnings emitted For more information about this error, try `rustc --explain E0005`. diff --git a/tests/ui/rfcs/rfc-2008-non-exhaustive/stable-omitted-patterns.rs b/tests/ui/rfcs/rfc-2008-non-exhaustive/stable-omitted-patterns.rs index 20b51a5cf3f72..1828fdef90139 100644 --- a/tests/ui/rfcs/rfc-2008-non-exhaustive/stable-omitted-patterns.rs +++ b/tests/ui/rfcs/rfc-2008-non-exhaustive/stable-omitted-patterns.rs @@ -19,10 +19,10 @@ fn main() { #[deny(non_exhaustive_omitted_patterns)] match UnstableEnum::Stable { + //~^ some variants are not matched explicitly UnstableEnum::Stable => {} _ => {} } - //~^^ some variants are not matched explicitly // Ok: although this is a bit odd, we don't have anything to report // since there is no stable variants and the feature is off diff --git a/tests/ui/rfcs/rfc-2008-non-exhaustive/stable-omitted-patterns.stderr b/tests/ui/rfcs/rfc-2008-non-exhaustive/stable-omitted-patterns.stderr index 5b75cfb69fe0c..27939176f75ed 100644 --- a/tests/ui/rfcs/rfc-2008-non-exhaustive/stable-omitted-patterns.stderr +++ b/tests/ui/rfcs/rfc-2008-non-exhaustive/stable-omitted-patterns.stderr @@ -13,10 +13,10 @@ LL | #[warn(non_exhaustive_omitted_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: some variants are not matched explicitly - --> $DIR/stable-omitted-patterns.rs:23:9 + --> $DIR/stable-omitted-patterns.rs:21:11 | -LL | _ => {} - | ^ pattern `UnstableEnum::Stable2` not covered +LL | match UnstableEnum::Stable { + | ^^^^^^^^^^^^^^^^^^^^ pattern `UnstableEnum::Stable2` not covered | = help: ensure that all variants are matched explicitly by adding the suggested match arms = note: the matched value is of type `UnstableEnum` and the `non_exhaustive_omitted_patterns` attribute was found