diff options
Diffstat (limited to 'compiler')
50 files changed, 154 insertions, 140 deletions
diff --git a/compiler/rustc_borrowck/src/diagnostics/bound_region_errors.rs b/compiler/rustc_borrowck/src/diagnostics/bound_region_errors.rs index aa968a1e40f..134f30ed6f5 100644 --- a/compiler/rustc_borrowck/src/diagnostics/bound_region_errors.rs +++ b/compiler/rustc_borrowck/src/diagnostics/bound_region_errors.rs @@ -406,8 +406,8 @@ impl<'tcx> TypeOpInfo<'tcx> for crate::type_check::InstantiateOpaqueType<'tcx> { // started MIR borrowchecking with, so the region // constraints have already been taken. Use the data from // our `mbcx` instead. - |vid| mbcx.regioncx.var_infos[vid].origin, - |vid| mbcx.regioncx.var_infos[vid].universe, + |vid| RegionVariableOrigin::Nll(mbcx.regioncx.definitions[vid].origin), + |vid| mbcx.regioncx.definitions[vid].universe, ) } } @@ -487,7 +487,7 @@ fn try_extract_error_from_region_constraints<'a, 'tcx>( let (sub_region, cause) = info?; debug!(?sub_region, "cause = {:#?}", cause); - let error = match (error_region, *sub_region) { + let error = match (error_region, sub_region.kind()) { (Some(error_region), ty::ReVar(vid)) => RegionResolutionError::SubSupConflict( vid, region_var_origin(vid), diff --git a/compiler/rustc_borrowck/src/diagnostics/mod.rs b/compiler/rustc_borrowck/src/diagnostics/mod.rs index 899e145c2c0..eb664f1d4f2 100644 --- a/compiler/rustc_borrowck/src/diagnostics/mod.rs +++ b/compiler/rustc_borrowck/src/diagnostics/mod.rs @@ -8,9 +8,7 @@ use rustc_errors::{Applicability, Diag, EmissionGuarantee, MultiSpan, listify}; use rustc_hir::def::{CtorKind, Namespace}; use rustc_hir::{self as hir, CoroutineKind, LangItem}; use rustc_index::IndexSlice; -use rustc_infer::infer::{ - BoundRegionConversionTime, NllRegionVariableOrigin, RegionVariableOrigin, -}; +use rustc_infer::infer::{BoundRegionConversionTime, NllRegionVariableOrigin}; use rustc_infer::traits::SelectionError; use rustc_middle::bug; use rustc_middle::mir::{ @@ -587,7 +585,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> { // this by hooking into the pretty printer and telling it to label the // lifetimes without names with the value `'0`. if let ty::Ref(region, ..) = ty.kind() { - match **region { + match region.kind() { ty::ReBound(_, ty::BoundRegion { kind: br, .. }) | ty::RePlaceholder(ty::PlaceholderRegion { bound: ty::BoundRegion { kind: br, .. }, @@ -607,7 +605,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> { let mut printer = ty::print::FmtPrinter::new(self.infcx.tcx, Namespace::TypeNS); let region = if let ty::Ref(region, ..) = ty.kind() { - match **region { + match region.kind() { ty::ReBound(_, ty::BoundRegion { kind: br, .. }) | ty::RePlaceholder(ty::PlaceholderRegion { bound: ty::BoundRegion { kind: br, .. }, @@ -633,9 +631,8 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> { ) { let predicate_span = path.iter().find_map(|constraint| { let outlived = constraint.sub; - if let Some(origin) = self.regioncx.var_infos.get(outlived) - && let RegionVariableOrigin::Nll(NllRegionVariableOrigin::Placeholder(_)) = - origin.origin + if let Some(origin) = self.regioncx.definitions.get(outlived) + && let NllRegionVariableOrigin::Placeholder(_) = origin.origin && let ConstraintCategory::Predicate(span) = constraint.category { Some(span) diff --git a/compiler/rustc_borrowck/src/diagnostics/region_errors.rs b/compiler/rustc_borrowck/src/diagnostics/region_errors.rs index d1d783c22e3..8d530b51636 100644 --- a/compiler/rustc_borrowck/src/diagnostics/region_errors.rs +++ b/compiler/rustc_borrowck/src/diagnostics/region_errors.rs @@ -190,7 +190,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> { where T: TypeFoldable<TyCtxt<'tcx>>, { - fold_regions(tcx, ty, |region, _| match *region { + fold_regions(tcx, ty, |region, _| match region.kind() { ty::ReVar(vid) => self.to_error_region(vid).unwrap_or(region), _ => region, }) @@ -198,7 +198,8 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> { /// Returns `true` if a closure is inferred to be an `FnMut` closure. fn is_closure_fn_mut(&self, fr: RegionVid) -> bool { - if let Some(ty::ReLateParam(late_param)) = self.to_error_region(fr).as_deref() + if let Some(r) = self.to_error_region(fr) + && let ty::ReLateParam(late_param) = r.kind() && let ty::LateParamRegionKind::ClosureEnv = late_param.kind && let DefiningTy::Closure(_, args) = self.regioncx.universal_regions().defining_ty { @@ -832,7 +833,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> { if let (Some(f), Some(outlived_f)) = (self.to_error_region(fr), self.to_error_region(outlived_fr)) { - if *outlived_f != ty::ReStatic { + if outlived_f.kind() != ty::ReStatic { return; } let suitable_region = self.infcx.tcx.is_suitable_region(self.mir_def_id(), f); diff --git a/compiler/rustc_borrowck/src/diagnostics/region_name.rs b/compiler/rustc_borrowck/src/diagnostics/region_name.rs index 45f5eaa514b..b08c10983bb 100644 --- a/compiler/rustc_borrowck/src/diagnostics/region_name.rs +++ b/compiler/rustc_borrowck/src/diagnostics/region_name.rs @@ -288,7 +288,7 @@ impl<'tcx> MirBorrowckCtxt<'_, '_, 'tcx> { let tcx = self.infcx.tcx; debug!("give_region_a_name: error_region = {:?}", error_region); - match *error_region { + match error_region.kind() { ty::ReEarlyParam(ebr) => ebr.has_name().then(|| { let def_id = tcx.generics_of(self.mir_def_id()).region_param(ebr, tcx).def_id; let span = tcx.hir_span_if_local(def_id).unwrap_or(DUMMY_SP); @@ -896,7 +896,7 @@ impl<'tcx> MirBorrowckCtxt<'_, '_, 'tcx> { &self, fr: RegionVid, ) -> Option<RegionName> { - let ty::ReEarlyParam(region) = *self.to_error_region(fr)? else { + let ty::ReEarlyParam(region) = self.to_error_region(fr)?.kind() else { return None; }; if region.has_name() { @@ -912,7 +912,7 @@ impl<'tcx> MirBorrowckCtxt<'_, '_, 'tcx> { let found = tcx .any_free_region_meets(&tcx.type_of(region_parent).instantiate_identity(), |r| { - *r == ty::ReEarlyParam(region) + r.kind() == ty::ReEarlyParam(region) }); Some(RegionName { @@ -931,7 +931,7 @@ impl<'tcx> MirBorrowckCtxt<'_, '_, 'tcx> { &self, fr: RegionVid, ) -> Option<RegionName> { - let ty::ReEarlyParam(region) = *self.to_error_region(fr)? else { + let ty::ReEarlyParam(region) = self.to_error_region(fr)?.kind() else { return None; }; if region.has_name() { @@ -1007,7 +1007,7 @@ impl<'tcx> MirBorrowckCtxt<'_, '_, 'tcx> { if data.projection_term.self_ty() == ty => {} _ => return false, } - tcx.any_free_region_meets(pred, |r| *r == ty::ReEarlyParam(region)) + tcx.any_free_region_meets(pred, |r| r.kind() == ty::ReEarlyParam(region)) }) } else { false diff --git a/compiler/rustc_borrowck/src/polonius/dump.rs b/compiler/rustc_borrowck/src/polonius/dump.rs index 9e4ebfa5930..eb53a98832c 100644 --- a/compiler/rustc_borrowck/src/polonius/dump.rs +++ b/compiler/rustc_borrowck/src/polonius/dump.rs @@ -334,7 +334,7 @@ fn emit_mermaid_nll_regions<'tcx>( writeln!(out, "flowchart TD")?; // Emit the region nodes. - for region in regioncx.var_infos.indices() { + for region in regioncx.definitions.indices() { write!(out, "{}[\"", region.as_usize())?; render_region(region, regioncx, out)?; writeln!(out, "\"]")?; @@ -387,7 +387,7 @@ fn emit_mermaid_nll_sccs<'tcx>( // Gather and emit the SCC nodes. let mut nodes_per_scc: IndexVec<_, _> = regioncx.constraint_sccs().all_sccs().map(|_| Vec::new()).collect(); - for region in regioncx.var_infos.indices() { + for region in regioncx.definitions.indices() { let scc = regioncx.constraint_sccs().scc(region); nodes_per_scc[scc].push(region); } diff --git a/compiler/rustc_borrowck/src/region_infer/mod.rs b/compiler/rustc_borrowck/src/region_infer/mod.rs index 15a515a501a..569c46e6403 100644 --- a/compiler/rustc_borrowck/src/region_infer/mod.rs +++ b/compiler/rustc_borrowck/src/region_infer/mod.rs @@ -141,13 +141,11 @@ impl RegionTracker { } pub struct RegionInferenceContext<'tcx> { - pub var_infos: VarInfos, - /// Contains the definition for every region variable. Region /// variables are identified by their index (`RegionVid`). The /// definition contains information about where the region came /// from as well as its final inferred value. - definitions: IndexVec<RegionVid, RegionDefinition<'tcx>>, + pub(crate) definitions: IndexVec<RegionVid, RegionDefinition<'tcx>>, /// The liveness constraints added to each region. For most /// regions, these start out empty and steadily grow, though for @@ -455,7 +453,6 @@ impl<'tcx> RegionInferenceContext<'tcx> { Rc::new(member_constraints.into_mapped(|r| constraint_sccs.scc(r))); let mut result = Self { - var_infos, definitions, liveness_constraints, constraints, diff --git a/compiler/rustc_borrowck/src/region_infer/opaque_types.rs b/compiler/rustc_borrowck/src/region_infer/opaque_types.rs index 5dc21667447..550c57338d3 100644 --- a/compiler/rustc_borrowck/src/region_infer/opaque_types.rs +++ b/compiler/rustc_borrowck/src/region_infer/opaque_types.rs @@ -186,7 +186,7 @@ impl<'tcx> RegionInferenceContext<'tcx> { where T: TypeFoldable<TyCtxt<'tcx>>, { - fold_regions(tcx, ty, |region, _| match *region { + fold_regions(tcx, ty, |region, _| match region.kind() { ty::ReVar(vid) => { let scc = self.constraint_sccs.scc(vid); diff --git a/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs b/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs index a1fb64e85dc..ccb257ae093 100644 --- a/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs +++ b/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs @@ -205,7 +205,7 @@ impl<'a, 'tcx> ConstraintConversion<'a, 'tcx> { /// are dealt with during trait solving. fn replace_placeholders_with_nll<T: TypeFoldable<TyCtxt<'tcx>>>(&mut self, value: T) -> T { if value.has_placeholders() { - fold_regions(self.tcx, value, |r, _| match *r { + fold_regions(self.tcx, value, |r, _| match r.kind() { ty::RePlaceholder(placeholder) => { self.constraints.placeholder_region(self.infcx, placeholder) } @@ -227,7 +227,7 @@ impl<'a, 'tcx> ConstraintConversion<'a, 'tcx> { } fn to_region_vid(&mut self, r: ty::Region<'tcx>) -> ty::RegionVid { - if let ty::RePlaceholder(placeholder) = *r { + if let ty::RePlaceholder(placeholder) = r.kind() { self.constraints.placeholder_region(self.infcx, placeholder).as_var() } else { self.universal_regions.to_region_vid(r) diff --git a/compiler/rustc_borrowck/src/type_check/opaque_types.rs b/compiler/rustc_borrowck/src/type_check/opaque_types.rs index 8bab979a724..d41cbf757d7 100644 --- a/compiler/rustc_borrowck/src/type_check/opaque_types.rs +++ b/compiler/rustc_borrowck/src/type_check/opaque_types.rs @@ -271,7 +271,7 @@ where } fn visit_region(&mut self, r: ty::Region<'tcx>) { - match *r { + match r.kind() { // ignore bound regions, keep visiting ty::ReBound(_, _) => {} _ => (self.op)(r), diff --git a/compiler/rustc_borrowck/src/universal_regions.rs b/compiler/rustc_borrowck/src/universal_regions.rs index 8f6b405fcef..5c57ab99a85 100644 --- a/compiler/rustc_borrowck/src/universal_regions.rs +++ b/compiler/rustc_borrowck/src/universal_regions.rs @@ -909,19 +909,19 @@ impl<'tcx> UniversalRegionIndices<'tcx> { /// if it is a placeholder. Handling placeholders requires access to the /// `MirTypeckRegionConstraints`. fn to_region_vid(&self, r: ty::Region<'tcx>) -> RegionVid { - if let ty::ReVar(..) = *r { - r.as_var() - } else if let ty::ReError(guar) = *r { - self.tainted_by_errors.set(Some(guar)); - // We use the `'static` `RegionVid` because `ReError` doesn't actually exist in the - // `UniversalRegionIndices`. This is fine because 1) it is a fallback only used if - // errors are being emitted and 2) it leaves the happy path unaffected. - self.fr_static - } else { - *self + match r.kind() { + ty::ReVar(..) => r.as_var(), + ty::ReError(guar) => { + self.tainted_by_errors.set(Some(guar)); + // We use the `'static` `RegionVid` because `ReError` doesn't actually exist in the + // `UniversalRegionIndices`. This is fine because 1) it is a fallback only used if + // errors are being emitted and 2) it leaves the happy path unaffected. + self.fr_static + } + _ => *self .indices .get(&r) - .unwrap_or_else(|| bug!("cannot convert `{:?}` to a region vid", r)) + .unwrap_or_else(|| bug!("cannot convert `{:?}` to a region vid", r)), } } diff --git a/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs b/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs index 5e68bb31001..32a8f101849 100644 --- a/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs +++ b/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs @@ -442,7 +442,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for RemapLateParam<'tcx> { } fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> { - if let ty::ReLateParam(fr) = *r { + if let ty::ReLateParam(fr) = r.kind() { ty::Region::new_late_param( self.tcx, fr.scope, diff --git a/compiler/rustc_hir_analysis/src/check/wfcheck.rs b/compiler/rustc_hir_analysis/src/check/wfcheck.rs index 83d095ab72e..6292d03bf6a 100644 --- a/compiler/rustc_hir_analysis/src/check/wfcheck.rs +++ b/compiler/rustc_hir_analysis/src/check/wfcheck.rs @@ -631,7 +631,7 @@ fn gather_gat_bounds<'tcx, T: TypeFoldable<TyCtxt<'tcx>>>( // Ignore `'static` lifetimes for the purpose of this lint: it's // because we know it outlives everything and so doesn't give meaningful // clues. Also ignore `ReError`, to avoid knock-down errors. - if let ty::ReStatic | ty::ReError(_) = **region_a { + if let ty::ReStatic | ty::ReError(_) = region_a.kind() { continue; } // For each region argument (e.g., `'a` in our example), check for a @@ -672,7 +672,7 @@ fn gather_gat_bounds<'tcx, T: TypeFoldable<TyCtxt<'tcx>>>( // Again, skip `'static` because it outlives everything. Also, we trivially // know that a region outlives itself. Also ignore `ReError`, to avoid // knock-down errors. - if matches!(**region_b, ty::ReStatic | ty::ReError(_)) || region_a == region_b { + if matches!(region_b.kind(), ty::ReStatic | ty::ReError(_)) || region_a == region_b { continue; } if region_known_to_outlive(tcx, item_def_id, param_env, wf_tys, *region_a, *region_b) { diff --git a/compiler/rustc_hir_analysis/src/coherence/builtin.rs b/compiler/rustc_hir_analysis/src/coherence/builtin.rs index 1f3f0b754bb..8ad9d80c6b5 100644 --- a/compiler/rustc_hir_analysis/src/coherence/builtin.rs +++ b/compiler/rustc_hir_analysis/src/coherence/builtin.rs @@ -656,7 +656,7 @@ fn infringing_fields_error<'tcx>( .entry((ty.clone(), predicate.clone())) .or_default() .push(origin.span()); - if let ty::RegionKind::ReEarlyParam(ebr) = *b + if let ty::RegionKind::ReEarlyParam(ebr) = b.kind() && ebr.has_name() { bounds.push((b.to_string(), a.to_string(), None)); diff --git a/compiler/rustc_hir_analysis/src/collect.rs b/compiler/rustc_hir_analysis/src/collect.rs index e9cd22435d9..f577f0c457e 100644 --- a/compiler/rustc_hir_analysis/src/collect.rs +++ b/compiler/rustc_hir_analysis/src/collect.rs @@ -1416,7 +1416,7 @@ fn recover_infer_ret_ty<'tcx>( GenericParamKind::Lifetime { .. } => true, _ => false, }); - let fn_sig = fold_regions(tcx, fn_sig, |r, _| match *r { + let fn_sig = fold_regions(tcx, fn_sig, |r, _| match r.kind() { ty::ReErased => { if has_region_params { ty::Region::new_error_with_message( diff --git a/compiler/rustc_hir_analysis/src/collect/predicates_of.rs b/compiler/rustc_hir_analysis/src/collect/predicates_of.rs index 320225a7a66..e90a1cc24c1 100644 --- a/compiler/rustc_hir_analysis/src/collect/predicates_of.rs +++ b/compiler/rustc_hir_analysis/src/collect/predicates_of.rs @@ -359,7 +359,7 @@ fn compute_bidirectional_outlives_predicates<'tcx>( ) { for param in opaque_own_params { let orig_lifetime = tcx.map_opaque_lifetime_to_parent_lifetime(param.def_id.expect_local()); - if let ty::ReEarlyParam(..) = *orig_lifetime { + if let ty::ReEarlyParam(..) = orig_lifetime.kind() { let dup_lifetime = ty::Region::new_early_param( tcx, ty::EarlyParamRegion { index: param.index, name: param.name }, diff --git a/compiler/rustc_hir_analysis/src/constrained_generic_params.rs b/compiler/rustc_hir_analysis/src/constrained_generic_params.rs index 53866aa27b1..951eda72ffe 100644 --- a/compiler/rustc_hir_analysis/src/constrained_generic_params.rs +++ b/compiler/rustc_hir_analysis/src/constrained_generic_params.rs @@ -80,7 +80,7 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for ParameterCollector { } fn visit_region(&mut self, r: ty::Region<'tcx>) { - if let ty::ReEarlyParam(data) = *r { + if let ty::ReEarlyParam(data) = r.kind() { self.parameters.push(Parameter::from(data)); } } diff --git a/compiler/rustc_hir_analysis/src/outlives/utils.rs b/compiler/rustc_hir_analysis/src/outlives/utils.rs index d0a2a2230ab..044fb64ca82 100644 --- a/compiler/rustc_hir_analysis/src/outlives/utils.rs +++ b/compiler/rustc_hir_analysis/src/outlives/utils.rs @@ -146,7 +146,7 @@ pub(crate) fn insert_outlives_predicate<'tcx>( fn is_free_region(region: Region<'_>) -> bool { // First, screen for regions that might appear in a type header. - match *region { + match region.kind() { // These correspond to `T: 'a` relationships: // // struct Foo<'a, T> { diff --git a/compiler/rustc_hir_analysis/src/variance/constraints.rs b/compiler/rustc_hir_analysis/src/variance/constraints.rs index 8475903c68f..23223de918c 100644 --- a/compiler/rustc_hir_analysis/src/variance/constraints.rs +++ b/compiler/rustc_hir_analysis/src/variance/constraints.rs @@ -428,7 +428,7 @@ impl<'a, 'tcx> ConstraintContext<'a, 'tcx> { region: ty::Region<'tcx>, variance: VarianceTermPtr<'a>, ) { - match *region { + match region.kind() { ty::ReEarlyParam(ref data) => { self.add_constraint(current, data.index, variance); } diff --git a/compiler/rustc_infer/src/infer/canonical/canonicalizer.rs b/compiler/rustc_infer/src/infer/canonical/canonicalizer.rs index 307110d9fbc..a1a0926cd81 100644 --- a/compiler/rustc_infer/src/infer/canonical/canonicalizer.rs +++ b/compiler/rustc_infer/src/infer/canonical/canonicalizer.rs @@ -159,7 +159,7 @@ impl CanonicalizeMode for CanonicalizeQueryResponse { ) -> ty::Region<'tcx> { let infcx = canonicalizer.infcx.unwrap(); - if let ty::ReVar(vid) = *r { + if let ty::ReVar(vid) = r.kind() { r = infcx .inner .borrow_mut() @@ -171,7 +171,7 @@ impl CanonicalizeMode for CanonicalizeQueryResponse { ); }; - match *r { + match r.kind() { ty::ReLateParam(_) | ty::ReErased | ty::ReStatic | ty::ReEarlyParam(..) => r, ty::RePlaceholder(placeholder) => canonicalizer.canonical_var_for_region( @@ -227,7 +227,7 @@ impl CanonicalizeMode for CanonicalizeUserTypeAnnotation { canonicalizer: &mut Canonicalizer<'_, 'tcx>, r: ty::Region<'tcx>, ) -> ty::Region<'tcx> { - match *r { + match r.kind() { ty::ReEarlyParam(_) | ty::ReLateParam(_) | ty::ReErased @@ -321,7 +321,7 @@ impl<'cx, 'tcx> TypeFolder<TyCtxt<'tcx>> for Canonicalizer<'cx, 'tcx> { } fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> { - match *r { + match r.kind() { ty::ReBound(index, ..) => { if index >= self.binder_index { bug!("escaping late-bound region during canonicalization"); diff --git a/compiler/rustc_infer/src/infer/canonical/query_response.rs b/compiler/rustc_infer/src/infer/canonical/query_response.rs index d53f631cc07..5220071c500 100644 --- a/compiler/rustc_infer/src/infer/canonical/query_response.rs +++ b/compiler/rustc_infer/src/infer/canonical/query_response.rs @@ -432,7 +432,7 @@ impl<'tcx> InferCtxt<'tcx> { } GenericArgKind::Lifetime(result_value) => { // e.g., here `result_value` might be `'?1` in the example above... - if let ty::ReBound(debruijn, br) = *result_value { + if let ty::ReBound(debruijn, br) = result_value.kind() { // ... in which case we would set `canonical_vars[0]` to `Some('static)`. // We only allow a `ty::INNERMOST` index in generic parameters. diff --git a/compiler/rustc_infer/src/infer/freshen.rs b/compiler/rustc_infer/src/infer/freshen.rs index f2bb66ff736..cae674165f0 100644 --- a/compiler/rustc_infer/src/infer/freshen.rs +++ b/compiler/rustc_infer/src/infer/freshen.rs @@ -109,7 +109,7 @@ impl<'a, 'tcx> TypeFolder<TyCtxt<'tcx>> for TypeFreshener<'a, 'tcx> { } fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> { - match *r { + match r.kind() { ty::ReBound(..) => { // leave bound regions alone r diff --git a/compiler/rustc_infer/src/infer/lexical_region_resolve/mod.rs b/compiler/rustc_infer/src/infer/lexical_region_resolve/mod.rs index 91595de97f7..e3522137d83 100644 --- a/compiler/rustc_infer/src/infer/lexical_region_resolve/mod.rs +++ b/compiler/rustc_infer/src/infer/lexical_region_resolve/mod.rs @@ -218,7 +218,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> { true } VarValue::Value(cur_region) => { - match *cur_region { + match cur_region.kind() { // If this empty region is from a universe that can name the // placeholder universe, then the LUB is the Placeholder region // (which is the cur_region). Otherwise, the LUB is the Static @@ -310,7 +310,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> { match *b_data { VarValue::Empty(empty_ui) => { - let lub = match *a_region { + let lub = match a_region.kind() { RePlaceholder(placeholder) => { // If this empty region is from a universe that can // name the placeholder, then the placeholder is @@ -350,7 +350,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> { // tighter bound than `'static`. // // (This might e.g. arise from being asked to prove `for<'a> { 'b: 'a }`.) - if let ty::RePlaceholder(p) = *lub + if let ty::RePlaceholder(p) = lub.kind() && b_universe.cannot_name(p.universe) { lub = self.tcx().lifetimes.re_static; @@ -377,7 +377,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> { a_ui.min(b_ui) == b_ui } (VarValue::Value(a), VarValue::Empty(_)) => { - match *a { + match a.kind() { // this is always on an error path, // so it doesn't really matter if it's shorter or longer than an empty region ReError(_) => false, @@ -410,7 +410,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> { } } (VarValue::Empty(a_ui), VarValue::Value(b)) => { - match *b { + match b.kind() { // this is always on an error path, // so it doesn't really matter if it's shorter or longer than an empty region ReError(_) => false, @@ -479,7 +479,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> { /// term "concrete regions"). #[instrument(level = "trace", skip(self), ret)] fn lub_concrete_regions(&self, a: Region<'tcx>, b: Region<'tcx>) -> Region<'tcx> { - match (*a, *b) { + match (a.kind(), b.kind()) { (ReBound(..), _) | (_, ReBound(..)) | (ReErased, _) | (_, ReErased) => { bug!("cannot relate region: LUB({:?}, {:?})", a, b); } @@ -725,7 +725,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> { // SubSupConflict(ReLateParam, ReLateParam) when reporting error, and so // the user will more likely get a specific suggestion. fn region_order_key(x: &RegionAndOrigin<'_>) -> u8 { - match *x.region { + match x.region.kind() { ReEarlyParam(_) => 0, ReLateParam(_) => 1, _ => 2, @@ -737,7 +737,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> { let node_universe = self.var_infos[node_idx].universe; for lower_bound in &lower_bounds { - let effective_lower_bound = if let ty::RePlaceholder(p) = *lower_bound.region { + let effective_lower_bound = if let ty::RePlaceholder(p) = lower_bound.region.kind() { if node_universe.cannot_name(p.universe) { self.tcx().lifetimes.re_static } else { @@ -785,7 +785,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> { .expect("lower_vid_bounds should at least include `node_idx`"); for upper_bound in &upper_bounds { - if let ty::RePlaceholder(p) = *upper_bound.region { + if let ty::RePlaceholder(p) = upper_bound.region.kind() { if min_universe.cannot_name(p.universe) { let origin = self.var_infos[node_idx].origin; errors.push(RegionResolutionError::UpperBoundUniverseConflict( @@ -913,7 +913,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> { generic_ty: Ty<'tcx>, min: ty::Region<'tcx>, ) -> bool { - if let ty::ReError(_) = *min { + if let ty::ReError(_) = min.kind() { return true; } @@ -931,18 +931,18 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> { } VerifyBound::OutlivedBy(r) => { - let a = match *min { + let a = match min.kind() { ty::ReVar(rid) => var_values.values[rid], _ => VarValue::Value(min), }; - let b = match **r { + let b = match r.kind() { ty::ReVar(rid) => var_values.values[rid], _ => VarValue::Value(*r), }; self.sub_region_values(a, b) } - VerifyBound::IsEmpty => match *min { + VerifyBound::IsEmpty => match min.kind() { ty::ReVar(rid) => match var_values.values[rid] { VarValue::ErrorValue => false, VarValue::Empty(_) => true, @@ -989,7 +989,7 @@ impl<'tcx> LexicalRegionResolutions<'tcx> { tcx: TyCtxt<'tcx>, r: ty::Region<'tcx>, ) -> ty::Region<'tcx> { - let result = match *r { + let result = match r.kind() { ty::ReVar(rid) => match self.values[rid] { VarValue::Empty(_) => r, VarValue::Value(r) => r, diff --git a/compiler/rustc_infer/src/infer/outlives/env.rs b/compiler/rustc_infer/src/infer/outlives/env.rs index e924c974a02..cb5a33c5c97 100644 --- a/compiler/rustc_infer/src/infer/outlives/env.rs +++ b/compiler/rustc_infer/src/infer/outlives/env.rs @@ -69,7 +69,7 @@ impl<'tcx> OutlivesEnvironment<'tcx> { region_bound_pairs .insert(ty::OutlivesPredicate(GenericKind::Alias(alias_b), r_a)); } - OutlivesBound::RegionSubRegion(r_a, r_b) => match (*r_a, *r_b) { + OutlivesBound::RegionSubRegion(r_a, r_b) => match (r_a.kind(), r_b.kind()) { ( ty::ReStatic | ty::ReEarlyParam(_) | ty::ReLateParam(_), ty::ReStatic | ty::ReEarlyParam(_) | ty::ReLateParam(_), diff --git a/compiler/rustc_infer/src/infer/outlives/for_liveness.rs b/compiler/rustc_infer/src/infer/outlives/for_liveness.rs index 379410641fe..c44d9723f29 100644 --- a/compiler/rustc_infer/src/infer/outlives/for_liveness.rs +++ b/compiler/rustc_infer/src/infer/outlives/for_liveness.rs @@ -29,7 +29,7 @@ where } fn visit_region(&mut self, r: ty::Region<'tcx>) { - match *r { + match r.kind() { // ignore bound regions, keep visiting ty::ReBound(_, _) => {} _ => (self.op)(r), diff --git a/compiler/rustc_infer/src/infer/region_constraints/leak_check.rs b/compiler/rustc_infer/src/infer/region_constraints/leak_check.rs index 3cfc58dea05..e332b6d0447 100644 --- a/compiler/rustc_infer/src/infer/region_constraints/leak_check.rs +++ b/compiler/rustc_infer/src/infer/region_constraints/leak_check.rs @@ -155,7 +155,7 @@ impl<'a, 'tcx> LeakCheck<'a, 'tcx> { self.scc_universes[scc].take_min(universe, *region); // Detect those SCCs that directly contain a placeholder - if let ty::RePlaceholder(placeholder) = **region { + if let ty::RePlaceholder(placeholder) = region.kind() { if self.outer_universe.cannot_name(placeholder.universe) { // Update `scc_placeholders` to account for the fact that `P: S` must hold. match self.scc_placeholders[scc] { diff --git a/compiler/rustc_infer/src/infer/region_constraints/mod.rs b/compiler/rustc_infer/src/infer/region_constraints/mod.rs index 57555db37ab..8366aa6ec42 100644 --- a/compiler/rustc_infer/src/infer/region_constraints/mod.rs +++ b/compiler/rustc_infer/src/infer/region_constraints/mod.rs @@ -463,7 +463,7 @@ impl<'tcx> RegionConstraintCollector<'_, 'tcx> { // cannot add constraints once regions are resolved debug!("origin = {:#?}", origin); - match (*sub, *sup) { + match (sub.kind(), sup.kind()) { (ReBound(..), _) | (_, ReBound(..)) => { span_bug!(origin.span(), "cannot relate bound region: {:?} <= {:?}", sub, sup); } @@ -595,7 +595,7 @@ impl<'tcx> RegionConstraintCollector<'_, 'tcx> { } pub fn universe(&mut self, region: Region<'tcx>) -> ty::UniverseIndex { - match *region { + match region.kind() { ty::ReStatic | ty::ReErased | ty::ReLateParam(..) diff --git a/compiler/rustc_infer/src/infer/relate/generalize.rs b/compiler/rustc_infer/src/infer/relate/generalize.rs index e16212955ff..b0ccd35e8f0 100644 --- a/compiler/rustc_infer/src/infer/relate/generalize.rs +++ b/compiler/rustc_infer/src/infer/relate/generalize.rs @@ -571,7 +571,7 @@ impl<'tcx> TypeRelation<TyCtxt<'tcx>> for Generalizer<'_, 'tcx> { ) -> RelateResult<'tcx, ty::Region<'tcx>> { assert_eq!(r, r2); // we are misusing TypeRelation here; both LHS and RHS ought to be == - match *r { + match r.kind() { // Never make variables for regions bound within the type itself, // nor for erased regions. ty::ReBound(..) | ty::ReErased => { diff --git a/compiler/rustc_infer/src/infer/resolve.rs b/compiler/rustc_infer/src/infer/resolve.rs index 4a99c220975..245f1a4ac5e 100644 --- a/compiler/rustc_infer/src/infer/resolve.rs +++ b/compiler/rustc_infer/src/infer/resolve.rs @@ -89,7 +89,7 @@ impl<'a, 'tcx> TypeFolder<TyCtxt<'tcx>> for OpportunisticRegionResolver<'a, 'tcx } fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> { - match *r { + match r.kind() { ty::ReVar(vid) => self .infcx .inner @@ -153,7 +153,7 @@ impl<'a, 'tcx> FallibleTypeFolder<TyCtxt<'tcx>> for FullTypeResolver<'a, 'tcx> { } fn try_fold_region(&mut self, r: ty::Region<'tcx>) -> Result<ty::Region<'tcx>, Self::Error> { - match *r { + match r.kind() { ty::ReVar(_) => Ok(self .infcx .lexical_region_resolutions diff --git a/compiler/rustc_lint/src/builtin.rs b/compiler/rustc_lint/src/builtin.rs index 38c2bf54432..e65f4beab24 100644 --- a/compiler/rustc_lint/src/builtin.rs +++ b/compiler/rustc_lint/src/builtin.rs @@ -1988,7 +1988,7 @@ impl ExplicitOutlivesRequirements { inferred_outlives .filter_map(|(clause, _)| match clause.kind().skip_binder() { - ty::ClauseKind::RegionOutlives(ty::OutlivesPredicate(a, b)) => match *a { + ty::ClauseKind::RegionOutlives(ty::OutlivesPredicate(a, b)) => match a.kind() { ty::ReEarlyParam(ebr) if item_generics.region_param(ebr, tcx).def_id == lifetime.to_def_id() => { @@ -2038,7 +2038,7 @@ impl ExplicitOutlivesRequirements { let is_inferred = match tcx.named_bound_var(lifetime.hir_id) { Some(ResolvedArg::EarlyBound(def_id)) => inferred_outlives .iter() - .any(|r| matches!(**r, ty::ReEarlyParam(ebr) if { item_generics.region_param(ebr, tcx).def_id == def_id.to_def_id() })), + .any(|r| matches!(r.kind(), ty::ReEarlyParam(ebr) if { item_generics.region_param(ebr, tcx).def_id == def_id.to_def_id() })), _ => false, }; diff --git a/compiler/rustc_lint/src/impl_trait_overcaptures.rs b/compiler/rustc_lint/src/impl_trait_overcaptures.rs index 26481b97076..f1dc420aa3c 100644 --- a/compiler/rustc_lint/src/impl_trait_overcaptures.rs +++ b/compiler/rustc_lint/src/impl_trait_overcaptures.rs @@ -461,7 +461,7 @@ fn extract_def_id_from_arg<'tcx>( arg: ty::GenericArg<'tcx>, ) -> DefId { match arg.unpack() { - ty::GenericArgKind::Lifetime(re) => match *re { + ty::GenericArgKind::Lifetime(re) => match re.kind() { ty::ReEarlyParam(ebr) => generics.region_param(ebr, tcx).def_id, ty::ReBound( _, @@ -530,7 +530,7 @@ impl<'tcx> TypeRelation<TyCtxt<'tcx>> for FunctionalVariances<'tcx> { a: ty::Region<'tcx>, _: ty::Region<'tcx>, ) -> RelateResult<'tcx, ty::Region<'tcx>> { - let def_id = match *a { + let def_id = match a.kind() { ty::ReEarlyParam(ebr) => self.generics.region_param(ebr, self.tcx).def_id, ty::ReBound( _, diff --git a/compiler/rustc_middle/src/ty/erase_regions.rs b/compiler/rustc_middle/src/ty/erase_regions.rs index 8bddb5c0fd7..45a0b1288db 100644 --- a/compiler/rustc_middle/src/ty/erase_regions.rs +++ b/compiler/rustc_middle/src/ty/erase_regions.rs @@ -65,7 +65,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for RegionEraserVisitor<'tcx> { // We must not erase bound regions. `for<'a> fn(&'a ())` and // `fn(&'free ())` are different types: they may implement different // traits and have a different `TypeId`. - match *r { + match r.kind() { ty::ReBound(..) => r, _ => self.tcx.lifetimes.re_erased, } diff --git a/compiler/rustc_middle/src/ty/flags.rs b/compiler/rustc_middle/src/ty/flags.rs index b0c442d28f0..2424923fb78 100644 --- a/compiler/rustc_middle/src/ty/flags.rs +++ b/compiler/rustc_middle/src/ty/flags.rs @@ -288,7 +288,7 @@ impl FlagComputation { fn add_region(&mut self, r: ty::Region<'_>) { self.add_flags(r.type_flags()); - if let ty::ReBound(debruijn, _) = *r { + if let ty::ReBound(debruijn, _) = r.kind() { self.add_bound_var(debruijn); } } diff --git a/compiler/rustc_middle/src/ty/fold.rs b/compiler/rustc_middle/src/ty/fold.rs index dc2c9e3d9f1..8dc73e4ce85 100644 --- a/compiler/rustc_middle/src/ty/fold.rs +++ b/compiler/rustc_middle/src/ty/fold.rs @@ -145,10 +145,10 @@ where } fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> { - match *r { + match r.kind() { ty::ReBound(debruijn, br) if debruijn == self.current_index => { let region = self.delegate.replace_region(br); - if let ty::ReBound(debruijn1, br) = *region { + if let ty::ReBound(debruijn1, br) = region.kind() { // If the callback returns a bound region, // that region should always use the INNERMOST // debruijn index. Then we adjust it to the diff --git a/compiler/rustc_middle/src/ty/opaque_types.rs b/compiler/rustc_middle/src/ty/opaque_types.rs index c72efde0994..9445a18ad76 100644 --- a/compiler/rustc_middle/src/ty/opaque_types.rs +++ b/compiler/rustc_middle/src/ty/opaque_types.rs @@ -95,7 +95,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for ReverseMapper<'tcx> { #[instrument(skip(self), level = "debug")] fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> { - match *r { + match r.kind() { // Ignore bound regions and `'static` regions that appear in the // type, we only need to remap regions that reference lifetimes // from the function declaration. diff --git a/compiler/rustc_middle/src/ty/print/pretty.rs b/compiler/rustc_middle/src/ty/print/pretty.rs index 3281cb4135a..0765d066fe9 100644 --- a/compiler/rustc_middle/src/ty/print/pretty.rs +++ b/compiler/rustc_middle/src/ty/print/pretty.rs @@ -2520,7 +2520,7 @@ impl<'tcx> PrettyPrinter<'tcx> for FmtPrinter<'_, 'tcx> { let identify_regions = self.tcx.sess.opts.unstable_opts.identify_regions; - match *region { + match region.kind() { ty::ReEarlyParam(ref data) => data.has_name(), ty::ReLateParam(ty::LateParamRegion { kind, .. }) => kind.is_named(), @@ -2590,7 +2590,7 @@ impl<'tcx> FmtPrinter<'_, 'tcx> { // the user might want to diagnose an error, but there is basically no way // to fit that into a short string. Hence the recommendation to use // `explain_region()` or `note_and_explain_region()`. - match *region { + match region.kind() { ty::ReEarlyParam(data) => { p!(write("{}", data.name)); return Ok(()); @@ -2680,7 +2680,7 @@ impl<'a, 'tcx> ty::TypeFolder<TyCtxt<'tcx>> for RegionFolder<'a, 'tcx> { fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> { let name = &mut self.name; - let region = match *r { + let region = match r.kind() { ty::ReBound(db, br) if db >= self.current_index => { *self.region_map.entry(br).or_insert_with(|| name(Some(db), self.current_index, br)) } @@ -2704,7 +2704,7 @@ impl<'a, 'tcx> ty::TypeFolder<TyCtxt<'tcx>> for RegionFolder<'a, 'tcx> { } _ => return r, }; - if let ty::ReBound(debruijn1, br) = *region { + if let ty::ReBound(debruijn1, br) = region.kind() { assert_eq!(debruijn1, ty::INNERMOST); ty::Region::new_bound(self.tcx, self.current_index, br) } else { diff --git a/compiler/rustc_middle/src/ty/region.rs b/compiler/rustc_middle/src/ty/region.rs index c78306f2ca3..3e4f7a79d53 100644 --- a/compiler/rustc_middle/src/ty/region.rs +++ b/compiler/rustc_middle/src/ty/region.rs @@ -1,5 +1,3 @@ -use std::ops::Deref; - use rustc_data_structures::intern::Interned; use rustc_errors::MultiSpan; use rustc_hir::def_id::DefId; @@ -22,7 +20,7 @@ impl<'tcx> rustc_type_ir::inherent::IntoKind for Region<'tcx> { type Kind = RegionKind<'tcx>; fn kind(self) -> RegionKind<'tcx> { - *self + *self.0.0 } } @@ -32,7 +30,7 @@ impl<'tcx> rustc_type_ir::Flags for Region<'tcx> { } fn outer_exclusive_binder(&self) -> ty::DebruijnIndex { - match **self { + match self.kind() { ty::ReBound(debruijn, _) => debruijn.shifted_in(1), _ => ty::INNERMOST, } @@ -163,7 +161,7 @@ impl<'tcx> Region<'tcx> { pub fn get_name(self) -> Option<Symbol> { if self.has_name() { - match *self { + match self.kind() { ty::ReEarlyParam(ebr) => Some(ebr.name), ty::ReBound(_, br) => br.kind.get_name(), ty::ReLateParam(fr) => fr.kind.get_name(), @@ -185,7 +183,7 @@ impl<'tcx> Region<'tcx> { /// Is this region named by the user? pub fn has_name(self) -> bool { - match *self { + match self.kind() { ty::ReEarlyParam(ebr) => ebr.has_name(), ty::ReBound(_, br) => br.kind.is_named(), ty::ReLateParam(fr) => fr.kind.is_named(), @@ -199,32 +197,32 @@ impl<'tcx> Region<'tcx> { #[inline] pub fn is_error(self) -> bool { - matches!(*self, ty::ReError(_)) + matches!(self.kind(), ty::ReError(_)) } #[inline] pub fn is_static(self) -> bool { - matches!(*self, ty::ReStatic) + matches!(self.kind(), ty::ReStatic) } #[inline] pub fn is_erased(self) -> bool { - matches!(*self, ty::ReErased) + matches!(self.kind(), ty::ReErased) } #[inline] pub fn is_bound(self) -> bool { - matches!(*self, ty::ReBound(..)) + matches!(self.kind(), ty::ReBound(..)) } #[inline] pub fn is_placeholder(self) -> bool { - matches!(*self, ty::RePlaceholder(..)) + matches!(self.kind(), ty::RePlaceholder(..)) } #[inline] pub fn bound_at_or_above_binder(self, index: ty::DebruijnIndex) -> bool { - match *self { + match self.kind() { ty::ReBound(debruijn, _) => debruijn >= index, _ => false, } @@ -233,7 +231,7 @@ impl<'tcx> Region<'tcx> { pub fn type_flags(self) -> TypeFlags { let mut flags = TypeFlags::empty(); - match *self { + match self.kind() { ty::ReVar(..) => { flags = flags | TypeFlags::HAS_FREE_REGIONS; flags = flags | TypeFlags::HAS_FREE_LOCAL_REGIONS; @@ -275,14 +273,14 @@ impl<'tcx> Region<'tcx> { /// True for free regions other than `'static`. pub fn is_param(self) -> bool { - matches!(*self, ty::ReEarlyParam(_) | ty::ReLateParam(_)) + matches!(self.kind(), ty::ReEarlyParam(_) | ty::ReLateParam(_)) } /// True for free region in the current context. /// /// This is the case for `'static` and param regions. pub fn is_free(self) -> bool { - match *self { + match self.kind() { ty::ReStatic | ty::ReEarlyParam(..) | ty::ReLateParam(..) => true, ty::ReVar(..) | ty::RePlaceholder(..) @@ -319,15 +317,6 @@ impl<'tcx> Region<'tcx> { } } -impl<'tcx> Deref for Region<'tcx> { - type Target = RegionKind<'tcx>; - - #[inline] - fn deref(&self) -> &RegionKind<'tcx> { - self.0.0 - } -} - #[derive(Copy, Clone, PartialEq, Eq, Hash, TyEncodable, TyDecodable)] #[derive(HashStable)] pub struct EarlyParamRegion { diff --git a/compiler/rustc_middle/src/ty/typeck_results.rs b/compiler/rustc_middle/src/ty/typeck_results.rs index 7c437abfe24..90c6ef67fb8 100644 --- a/compiler/rustc_middle/src/ty/typeck_results.rs +++ b/compiler/rustc_middle/src/ty/typeck_results.rs @@ -758,7 +758,7 @@ impl<'tcx> IsIdentity for CanonicalUserType<'tcx> { _ => false, }, - GenericArgKind::Lifetime(r) => match *r { + GenericArgKind::Lifetime(r) => match r.kind() { ty::ReBound(debruijn, br) => { // We only allow a `ty::INNERMOST` index in generic parameters. assert_eq!(debruijn, ty::INNERMOST); diff --git a/compiler/rustc_middle/src/ty/visit.rs b/compiler/rustc_middle/src/ty/visit.rs index e3b7a258c39..b341b30af6a 100644 --- a/compiler/rustc_middle/src/ty/visit.rs +++ b/compiler/rustc_middle/src/ty/visit.rs @@ -77,7 +77,7 @@ impl<'tcx> TyCtxt<'tcx> { } fn visit_region(&mut self, r: ty::Region<'tcx>) -> Self::Result { - match *r { + match r.kind() { ty::ReBound(debruijn, _) if debruijn < self.outer_index => { ControlFlow::Continue(()) } @@ -205,7 +205,7 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for LateBoundRegionsCollector { } fn visit_region(&mut self, r: ty::Region<'tcx>) { - if let ty::ReBound(debruijn, br) = *r { + if let ty::ReBound(debruijn, br) = r.kind() { if debruijn == self.current_index { self.regions.insert(br.kind); } @@ -250,7 +250,7 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for MaxUniverse { } fn visit_region(&mut self, r: ty::Region<'tcx>) { - if let ty::RePlaceholder(placeholder) = *r { + if let ty::RePlaceholder(placeholder) = r.kind() { self.max_universe = ty::UniverseIndex::from_u32( self.max_universe.as_u32().max(placeholder.universe.as_u32()), ); diff --git a/compiler/rustc_pattern_analysis/src/rustc.rs b/compiler/rustc_pattern_analysis/src/rustc.rs index 88d45ead295..7c12f69f14c 100644 --- a/compiler/rustc_pattern_analysis/src/rustc.rs +++ b/compiler/rustc_pattern_analysis/src/rustc.rs @@ -1,5 +1,6 @@ use std::fmt; use std::iter::once; +use std::ops::ControlFlow; use rustc_abi::{FIRST_VARIANT, FieldIdx, Integer, VariantIdx}; use rustc_arena::DroplessArena; @@ -11,7 +12,8 @@ use rustc_middle::mir::{self, Const}; use rustc_middle::thir::{self, Pat, PatKind, PatRange, PatRangeBoundary}; use rustc_middle::ty::layout::IntegerExt; use rustc_middle::ty::{ - self, FieldDef, OpaqueTypeKey, ScalarInt, Ty, TyCtxt, TypeVisitableExt, VariantDef, + self, FieldDef, OpaqueTypeKey, ScalarInt, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, + TypeVisitableExt, TypeVisitor, VariantDef, }; use rustc_middle::{bug, span_bug}; use rustc_session::lint; @@ -135,11 +137,22 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> { /// Returns the hidden type corresponding to this key if the body under analysis is allowed to /// know it. fn reveal_opaque_key(&self, key: OpaqueTypeKey<'tcx>) -> Option<Ty<'tcx>> { - self.typeck_results - .concrete_opaque_types - .get(&key.def_id) - .map(|x| ty::EarlyBinder::bind(x.ty).instantiate(self.tcx, key.args)) + if let Some(hidden_ty) = self.typeck_results.concrete_opaque_types.get(&key.def_id) { + let ty = ty::EarlyBinder::bind(hidden_ty.ty).instantiate(self.tcx, key.args); + if ty.visit_with(&mut RecursiveOpaque { def_id: key.def_id.into() }).is_continue() { + Some(ty) + } else { + // HACK: We skip revealing opaque types which recursively expand + // to themselves. This is because we may infer hidden types like + // `Opaque<T> = Opaque<Opaque<T>>` or `Opaque<T> = Opaque<(T,)>` + // in hir typeck. + None + } + } else { + None + } } + // This can take a non-revealed `Ty` because it reveals opaques itself. pub fn is_uninhabited(&self, ty: Ty<'tcx>) -> bool { !ty.inhabited_predicate(self.tcx).apply_revealing_opaque( @@ -1105,3 +1118,20 @@ pub fn analyze_match<'p, 'tcx>( Ok(report) } + +struct RecursiveOpaque { + def_id: DefId, +} +impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for RecursiveOpaque { + type Result = ControlFlow<()>; + + fn visit_ty(&mut self, t: Ty<'tcx>) -> Self::Result { + if let ty::Alias(ty::Opaque, alias_ty) = t.kind() { + if alias_ty.def_id == self.def_id { + return ControlFlow::Break(()); + } + } + + if t.has_opaque_types() { t.super_visit_with(self) } else { ControlFlow::Continue(()) } + } +} diff --git a/compiler/rustc_symbol_mangling/src/v0.rs b/compiler/rustc_symbol_mangling/src/v0.rs index 99d44bcd7eb..8edfd16016c 100644 --- a/compiler/rustc_symbol_mangling/src/v0.rs +++ b/compiler/rustc_symbol_mangling/src/v0.rs @@ -368,7 +368,7 @@ impl<'tcx> Printer<'tcx> for SymbolMangler<'tcx> { } fn print_region(&mut self, region: ty::Region<'_>) -> Result<(), PrintError> { - let i = match *region { + let i = match region.kind() { // Erased lifetimes use the index 0, for a // shorter mangling of `L_`. ty::ReErased => 0, diff --git a/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/util.rs b/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/util.rs index 683b5b528c6..fd2d2fa7210 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/util.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/util.rs @@ -42,7 +42,7 @@ pub fn find_param_with_region<'tcx>( anon_region: Region<'tcx>, replace_region: Region<'tcx>, ) -> Option<AnonymousParamInfo<'tcx>> { - let (id, kind) = match *anon_region { + let (id, kind) = match anon_region.kind() { ty::ReLateParam(late_param) => (late_param.scope, late_param.kind), ty::ReEarlyParam(ebr) => { let region_def = tcx.generics_of(generic_param_scope).region_param(ebr, tcx).def_id; diff --git a/compiler/rustc_trait_selection/src/error_reporting/infer/region.rs b/compiler/rustc_trait_selection/src/error_reporting/infer/region.rs index c7f0a88f951..593baa9ad45 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/infer/region.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/infer/region.rs @@ -299,7 +299,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { self.tcx.param_env(generic_param_scope), terr, ); - match (*sub, *sup) { + match (sub.kind(), sup.kind()) { (ty::RePlaceholder(_), ty::RePlaceholder(_)) => {} (ty::RePlaceholder(_), _) => { note_and_explain_region( @@ -391,7 +391,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { }) } infer::RelateParamBound(span, ty, opt_span) => { - let prefix = match *sub { + let prefix = match sub.kind() { ty::ReStatic => note_and_explain::PrefixKind::TypeSatisfy, _ => note_and_explain::PrefixKind::TypeOutlive, }; @@ -1048,7 +1048,7 @@ pub(super) fn note_and_explain_region<'tcx>( suffix: &str, alt_span: Option<Span>, ) { - let (description, span) = match *region { + let (description, span) = match region.kind() { ty::ReEarlyParam(_) | ty::ReLateParam(_) | ty::RePlaceholder(_) | ty::ReStatic => { msg_span_from_named_region(tcx, generic_param_scope, region, alt_span) } @@ -1085,7 +1085,7 @@ fn msg_span_from_named_region<'tcx>( region: ty::Region<'tcx>, alt_span: Option<Span>, ) -> (String, Option<Span>) { - match *region { + match region.kind() { ty::ReEarlyParam(br) => { let param_def_id = tcx.generics_of(generic_param_scope).region_param(br, tcx).def_id; let span = tcx.def_span(param_def_id); @@ -1185,7 +1185,7 @@ pub fn unexpected_hidden_region_diagnostic<'a, 'tcx>( }); // Explain the region we are capturing. - match *hidden_region { + match hidden_region.kind() { ty::ReEarlyParam(_) | ty::ReLateParam(_) | ty::ReStatic => { // Assuming regionck succeeded (*), we ought to always be // capturing *some* region from the fn header, and hence it diff --git a/compiler/rustc_trait_selection/src/errors/note_and_explain.rs b/compiler/rustc_trait_selection/src/errors/note_and_explain.rs index 46622246a17..e4ab78b6247 100644 --- a/compiler/rustc_trait_selection/src/errors/note_and_explain.rs +++ b/compiler/rustc_trait_selection/src/errors/note_and_explain.rs @@ -20,7 +20,7 @@ impl<'a> DescriptionCtx<'a> { region: ty::Region<'tcx>, alt_span: Option<Span>, ) -> Option<Self> { - let (span, kind, arg) = match *region { + let (span, kind, arg) = match region.kind() { ty::ReEarlyParam(br) => { let scope = tcx .parent(tcx.generics_of(generic_param_scope).region_param(br, tcx).def_id) diff --git a/compiler/rustc_trait_selection/src/opaque_types.rs b/compiler/rustc_trait_selection/src/opaque_types.rs index c7b8f063196..309bf4dda3d 100644 --- a/compiler/rustc_trait_selection/src/opaque_types.rs +++ b/compiler/rustc_trait_selection/src/opaque_types.rs @@ -46,7 +46,7 @@ pub fn check_opaque_type_parameter_valid<'tcx>( GenericArgKind::Lifetime(lt) => match defining_scope_kind { DefiningScopeKind::HirTypeck => continue, DefiningScopeKind::MirBorrowck => { - matches!(*lt, ty::ReEarlyParam(_) | ty::ReLateParam(_)) + matches!(lt.kind(), ty::ReEarlyParam(_) | ty::ReLateParam(_)) || (lt.is_static() && opaque_env.param_equal_static(i)) } }, diff --git a/compiler/rustc_trait_selection/src/traits/auto_trait.rs b/compiler/rustc_trait_selection/src/traits/auto_trait.rs index 1fca2f4da7e..02521c9453d 100644 --- a/compiler/rustc_trait_selection/src/traits/auto_trait.rs +++ b/compiler/rustc_trait_selection/src/traits/auto_trait.rs @@ -382,7 +382,7 @@ impl<'tcx> AutoTraitFinder<'tcx> { for (new_region, old_region) in iter::zip(new_args.regions(), old_args.regions()) { - match (*new_region, *old_region) { + match (new_region.kind(), old_region.kind()) { // If both predicates have an `ReBound` (a HRTB) in the // same spot, we do nothing. (ty::ReBound(_, _), ty::ReBound(_, _)) => {} diff --git a/compiler/rustc_trait_selection/src/traits/coherence.rs b/compiler/rustc_trait_selection/src/traits/coherence.rs index bcc247ba53c..93c7dae9c5b 100644 --- a/compiler/rustc_trait_selection/src/traits/coherence.rs +++ b/compiler/rustc_trait_selection/src/traits/coherence.rs @@ -537,7 +537,7 @@ fn plug_infer_with_placeholders<'tcx>( } fn visit_region(&mut self, r: ty::Region<'tcx>) { - if let ty::ReVar(vid) = *r { + if let ty::ReVar(vid) = r.kind() { let r = self .infcx .inner diff --git a/compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs b/compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs index fa6bbf1d6e5..bf9fcb0915a 100644 --- a/compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs +++ b/compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs @@ -797,7 +797,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for EraseEscapingBoundRegions<'tcx> { } fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> { - if let ty::ReBound(debruijn, _) = *r + if let ty::ReBound(debruijn, _) = r.kind() && debruijn < self.binder { r diff --git a/compiler/rustc_trait_selection/src/traits/query/normalize.rs b/compiler/rustc_trait_selection/src/traits/query/normalize.rs index 5dbb4382fd1..507932699c7 100644 --- a/compiler/rustc_trait_selection/src/traits/query/normalize.rs +++ b/compiler/rustc_trait_selection/src/traits/query/normalize.rs @@ -144,7 +144,7 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for MaxEscapingBoundVarVisitor { #[inline] fn visit_region(&mut self, r: ty::Region<'tcx>) { - match *r { + match r.kind() { ty::ReBound(debruijn, _) if debruijn > self.outer_index => { self.escaping = self.escaping.max(debruijn.as_usize() - self.outer_index.as_usize()); diff --git a/compiler/rustc_trait_selection/src/traits/util.rs b/compiler/rustc_trait_selection/src/traits/util.rs index 15f5cf916a4..9f20cd7eacb 100644 --- a/compiler/rustc_trait_selection/src/traits/util.rs +++ b/compiler/rustc_trait_selection/src/traits/util.rs @@ -289,7 +289,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for BoundVarReplacer<'_, 'tcx> { } fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> { - match *r { + match r.kind() { ty::ReBound(debruijn, _) if debruijn.as_usize() >= self.current_index.as_usize() + self.universe_indices.len() => @@ -407,7 +407,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for PlaceholderReplacer<'_, 'tcx> { } fn fold_region(&mut self, r0: ty::Region<'tcx>) -> ty::Region<'tcx> { - let r1 = match *r0 { + let r1 = match r0.kind() { ty::ReVar(vid) => self .infcx .inner @@ -417,7 +417,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for PlaceholderReplacer<'_, 'tcx> { _ => r0, }; - let r2 = match *r1 { + let r2 = match r1.kind() { ty::RePlaceholder(p) => { let replace_var = self.mapped_regions.get(&p); match replace_var { diff --git a/compiler/rustc_ty_utils/src/implied_bounds.rs b/compiler/rustc_ty_utils/src/implied_bounds.rs index 088d5e76b86..c44f90eb7b4 100644 --- a/compiler/rustc_ty_utils/src/implied_bounds.rs +++ b/compiler/rustc_ty_utils/src/implied_bounds.rs @@ -75,7 +75,7 @@ fn assumed_wf_types<'tcx>(tcx: TyCtxt<'tcx>, def_id: LocalDefId) -> &'tcx [(Ty<' { let orig_lt = tcx.map_opaque_lifetime_to_parent_lifetime(param.def_id.expect_local()); - if matches!(*orig_lt, ty::ReLateParam(..)) { + if matches!(orig_lt.kind(), ty::ReLateParam(..)) { mapping.insert( orig_lt, ty::Region::new_early_param( |