diff options
Diffstat (limited to 'compiler/rustc_trait_selection/src')
8 files changed, 19 insertions, 226 deletions
diff --git a/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/mismatched_static_lifetime.rs b/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/mismatched_static_lifetime.rs index ad2f7f00fa5..0904177ea8b 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/mismatched_static_lifetime.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/mismatched_static_lifetime.rs @@ -33,11 +33,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> { }; // If we added a "points at argument expression" obligation, we remove it here, we care // about the original obligation only. - let code = match cause.code() { - ObligationCauseCode::FunctionArg { parent_code, .. } => &*parent_code, - code => code, - }; - let ObligationCauseCode::MatchImpl(parent, impl_def_id) = code else { + let ObligationCauseCode::MatchImpl(parent, impl_def_id) = cause.code() else { return None; }; let (ObligationCauseCode::WhereClause(_, binding_span) diff --git a/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/static_impl_trait.rs b/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/static_impl_trait.rs index 3f15a79271d..083ce022238 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/static_impl_trait.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/static_impl_trait.rs @@ -1,27 +1,21 @@ //! Error Reporting for static impl Traits. use rustc_data_structures::fx::FxIndexSet; -use rustc_errors::{Applicability, Diag, ErrorGuaranteed, MultiSpan, Subdiagnostic}; +use rustc_errors::{Applicability, Diag, ErrorGuaranteed}; use rustc_hir::def_id::DefId; use rustc_hir::intravisit::{Visitor, VisitorExt, walk_ty}; use rustc_hir::{ self as hir, AmbigArg, GenericBound, GenericParam, GenericParamKind, Item, ItemKind, Lifetime, LifetimeName, LifetimeParamKind, MissingLifetimeKind, Node, TyKind, }; -use rustc_middle::ty::{ - self, AssocItemContainer, StaticLifetimeVisitor, Ty, TyCtxt, TypeSuperVisitable, TypeVisitor, -}; +use rustc_middle::ty::{self, Ty, TyCtxt, TypeSuperVisitable, TypeVisitor}; use rustc_span::def_id::LocalDefId; use rustc_span::{Ident, Span}; use tracing::debug; use crate::error_reporting::infer::nice_region_error::NiceRegionError; -use crate::errors::{ - ButCallingIntroduces, ButNeedsToSatisfy, DynTraitConstraintSuggestion, MoreTargeted, - ReqIntroducedLocations, -}; -use crate::infer::{RegionResolutionError, SubregionOrigin, TypeTrace}; -use crate::traits::{ObligationCauseCode, UnifyReceiverContext}; +use crate::errors::ButNeedsToSatisfy; +use crate::infer::{RegionResolutionError, SubregionOrigin}; impl<'a, 'tcx> NiceRegionError<'a, 'tcx> { /// Print the error message for lifetime errors when the return type is a static `impl Trait`, @@ -39,52 +33,6 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> { sup_r, spans, ) if sub_r.is_static() => (var_origin, sub_origin, sub_r, sup_origin, sup_r, spans), - RegionResolutionError::ConcreteFailure( - SubregionOrigin::Subtype(box TypeTrace { cause, .. }), - sub_r, - sup_r, - ) if sub_r.is_static() => { - // This is for an implicit `'static` requirement coming from `impl dyn Trait {}`. - if let ObligationCauseCode::UnifyReceiver(ctxt) = cause.code() { - // This may have a closure and it would cause ICE - // through `find_param_with_region` (#78262). - let anon_reg_sup = tcx.is_suitable_region(self.generic_param_scope, *sup_r)?; - let fn_returns = tcx.return_type_impl_or_dyn_traits(anon_reg_sup.scope); - if fn_returns.is_empty() { - return None; - } - - let param = self.find_param_with_region(*sup_r, *sub_r)?; - let simple_ident = param.param.pat.simple_ident(); - - let (has_impl_path, impl_path) = match ctxt.assoc_item.container { - AssocItemContainer::Trait => { - let id = ctxt.assoc_item.container_id(tcx); - (true, tcx.def_path_str(id)) - } - AssocItemContainer::Impl => (false, String::new()), - }; - - let mut err = self.tcx().dcx().create_err(ButCallingIntroduces { - param_ty_span: param.param_ty_span, - cause_span: cause.span, - has_param_name: simple_ident.is_some(), - param_name: simple_ident.map(|x| x.to_string()).unwrap_or_default(), - has_lifetime: sup_r.has_name(), - lifetime: sup_r.to_string(), - assoc_item: ctxt.assoc_item.name, - has_impl_path, - impl_path, - }); - if self.find_impl_on_dyn_trait(&mut err, param.param_ty, ctxt) { - let reported = err.emit(); - return Some(reported); - } else { - err.cancel() - } - } - return None; - } _ => return None, }; debug!( @@ -140,39 +88,6 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> { None }; - let mut subdiag = None; - - if let SubregionOrigin::Subtype(box TypeTrace { cause, .. }) = sub_origin { - if let ObligationCauseCode::ReturnValue(hir_id) - | ObligationCauseCode::BlockTailExpression(hir_id, ..) = cause.code() - { - let parent_id = tcx.hir_get_parent_item(*hir_id); - if let Some(fn_decl) = tcx.hir_fn_decl_by_hir_id(parent_id.into()) { - let mut span: MultiSpan = fn_decl.output.span().into(); - let mut spans = Vec::new(); - let mut add_label = true; - if let hir::FnRetTy::Return(ty) = fn_decl.output { - let mut v = StaticLifetimeVisitor(vec![], tcx.hir()); - v.visit_ty_unambig(ty); - if !v.0.is_empty() { - span = v.0.clone().into(); - spans = v.0; - add_label = false; - } - } - let fn_decl_span = fn_decl.output.span(); - - subdiag = Some(ReqIntroducedLocations { - span, - spans, - fn_decl_span, - cause_span: cause.span, - add_label, - }); - } - } - } - let diag = ButNeedsToSatisfy { sp, influencer_point, @@ -183,7 +98,6 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> { require_span_as_note: require_as_note.then_some(require_span), // We don't need a note, it's already at the end, it can be shown as a `span_label`. require_span_as_label: (!require_as_note).then_some(require_span), - req_introduces_loc: subdiag, has_lifetime: sup_r.has_name(), lifetime: lifetime_name.clone(), @@ -197,45 +111,6 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> { let fn_returns = tcx.return_type_impl_or_dyn_traits(anon_reg_sup.scope); - let mut override_error_code = None; - if let SubregionOrigin::Subtype(box TypeTrace { cause, .. }) = &sup_origin - && let ObligationCauseCode::UnifyReceiver(ctxt) = cause.code() - // Handle case of `impl Foo for dyn Bar { fn qux(&self) {} }` introducing a - // `'static` lifetime when called as a method on a binding: `bar.qux()`. - && self.find_impl_on_dyn_trait(&mut err, param.param_ty, ctxt) - { - override_error_code = Some(ctxt.assoc_item.name); - } - - if let SubregionOrigin::Subtype(box TypeTrace { cause, .. }) = &sub_origin - && let code = match cause.code() { - ObligationCauseCode::MatchImpl(parent, ..) => parent.code(), - _ => cause.code(), - } - && let ( - &ObligationCauseCode::WhereClause(item_def_id, _) - | &ObligationCauseCode::WhereClauseInExpr(item_def_id, ..), - None, - ) = (code, override_error_code) - { - // Same case of `impl Foo for dyn Bar { fn qux(&self) {} }` introducing a `'static` - // lifetime as above, but called using a fully-qualified path to the method: - // `Foo::qux(bar)`. - let mut v = TraitObjectVisitor(FxIndexSet::default()); - v.visit_ty(param.param_ty); - if let Some((ident, self_ty)) = - NiceRegionError::get_impl_ident_and_self_ty_from_trait(tcx, item_def_id, &v.0) - && self.suggest_constrain_dyn_trait_in_impl(&mut err, &v.0, ident, self_ty) - { - override_error_code = Some(ident.name); - } - } - if let (Some(ident), true) = (override_error_code, fn_returns.is_empty()) { - // Provide a more targeted error code and description. - let retarget_subdiag = MoreTargeted { ident }; - retarget_subdiag.add_to_diag(&mut err); - } - let arg = match param.param.pat.simple_ident() { Some(simple_ident) => format!("argument `{simple_ident}`"), None => "the argument".to_string(), @@ -495,8 +370,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> { kind: ItemKind::Impl(hir::Impl { self_ty, .. }), .. }) = tcx.hir_node_by_def_id(impl_did) && trait_objects.iter().all(|did| { - // FIXME: we should check `self_ty` against the receiver - // type in the `UnifyReceiver` context, but for now, use + // FIXME: we should check `self_ty`, but for now, use // this imperfect proxy. This will fail if there are // multiple `impl`s for the same trait like // `impl Foo for Box<dyn Bar>` and `impl Foo for dyn Bar`. @@ -516,62 +390,6 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> { _ => None, } } - - /// When we call a method coming from an `impl Foo for dyn Bar`, `dyn Bar` introduces a default - /// `'static` obligation. Suggest relaxing that implicit bound. - fn find_impl_on_dyn_trait( - &self, - err: &mut Diag<'_>, - ty: Ty<'_>, - ctxt: &UnifyReceiverContext<'tcx>, - ) -> bool { - let tcx = self.tcx(); - - // Find the method being called. - let Ok(Some(instance)) = ty::Instance::try_resolve( - tcx, - self.cx.typing_env(ctxt.param_env), - ctxt.assoc_item.def_id, - self.cx.resolve_vars_if_possible(ctxt.args), - ) else { - return false; - }; - - let mut v = TraitObjectVisitor(FxIndexSet::default()); - v.visit_ty(ty); - - // Get the `Ident` of the method being called and the corresponding `impl` (to point at - // `Bar` in `impl Foo for dyn Bar {}` and the definition of the method being called). - let Some((ident, self_ty)) = - NiceRegionError::get_impl_ident_and_self_ty_from_trait(tcx, instance.def_id(), &v.0) - else { - return false; - }; - - // Find the trait object types in the argument, so we point at *only* the trait object. - self.suggest_constrain_dyn_trait_in_impl(err, &v.0, ident, self_ty) - } - - fn suggest_constrain_dyn_trait_in_impl( - &self, - err: &mut Diag<'_>, - found_dids: &FxIndexSet<DefId>, - ident: Ident, - self_ty: &hir::Ty<'_>, - ) -> bool { - let mut suggested = false; - for found_did in found_dids { - let mut traits = vec![]; - let mut hir_v = HirTraitObjectVisitor(&mut traits, *found_did); - hir_v.visit_ty_unambig(self_ty); - for &span in &traits { - let subdiag = DynTraitConstraintSuggestion { span, ident }; - subdiag.add_to_diag(err); - suggested = true; - } - } - suggested - } } /// Collect all the trait objects in a type that could have received an implicit `'static` lifetime. diff --git a/compiler/rustc_trait_selection/src/error_reporting/infer/suggest.rs b/compiler/rustc_trait_selection/src/error_reporting/infer/suggest.rs index a87a449daf1..a7e68e6419d 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/infer/suggest.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/infer/suggest.rs @@ -237,7 +237,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> { Some(ConsiderAddingAwait::FutureSugg { span: then_span.shrink_to_hi() }) } ObligationCauseCode::MatchExpressionArm(box MatchExpressionArmCause { - ref prior_non_diverging_arms, + prior_non_diverging_arms, .. }) => Some({ ConsiderAddingAwait::FutureSuggMultiple { diff --git a/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs b/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs index c92dfa24f85..596f794568c 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs @@ -2437,7 +2437,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { obligated_types: &mut Vec<Ty<'tcx>>, cause_code: &ObligationCauseCode<'tcx>, ) -> bool { - if let ObligationCauseCode::BuiltinDerived(ref data) = cause_code { + if let ObligationCauseCode::BuiltinDerived(data) = cause_code { let parent_trait_ref = self.resolve_vars_if_possible(data.parent_trait_pred); let self_ty = parent_trait_ref.skip_binder().self_ty(); if obligated_types.iter().any(|ot| ot == &self_ty) { diff --git a/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs b/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs index 6eeb47a21f8..c7e71a626dc 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs @@ -974,7 +974,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { hir::ExprKind::MethodCall( hir::PathSegment { ident, .. }, _receiver, - &[], + [], call_span, ), hir_id, @@ -2680,7 +2680,6 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { | ObligationCauseCode::IntrinsicType | ObligationCauseCode::MethodReceiver | ObligationCauseCode::ReturnNoExpression - | ObligationCauseCode::UnifyReceiver(..) | ObligationCauseCode::Misc | ObligationCauseCode::WellFormed(..) | ObligationCauseCode::MatchImpl(..) diff --git a/compiler/rustc_trait_selection/src/errors.rs b/compiler/rustc_trait_selection/src/errors.rs index e8d30d3ee79..23aa3800660 100644 --- a/compiler/rustc_trait_selection/src/errors.rs +++ b/compiler/rustc_trait_selection/src/errors.rs @@ -509,21 +509,18 @@ impl Subdiagnostic for AddLifetimeParamsSuggestion<'_> { let node = self.tcx.hir_node_by_def_id(anon_reg.scope); let is_impl = matches!(&node, hir::Node::ImplItem(_)); let (generics, parent_generics) = match node { - hir::Node::Item(&hir::Item { - kind: hir::ItemKind::Fn { ref generics, .. }, - .. - }) - | hir::Node::TraitItem(&hir::TraitItem { ref generics, .. }) - | hir::Node::ImplItem(&hir::ImplItem { ref generics, .. }) => ( + hir::Node::Item(hir::Item { kind: hir::ItemKind::Fn { generics, .. }, .. }) + | hir::Node::TraitItem(hir::TraitItem { generics, .. }) + | hir::Node::ImplItem(hir::ImplItem { generics, .. }) => ( generics, match self.tcx.parent_hir_node(self.tcx.local_def_id_to_hir_id(anon_reg.scope)) { hir::Node::Item(hir::Item { - kind: hir::ItemKind::Trait(_, _, ref generics, ..), + kind: hir::ItemKind::Trait(_, _, generics, ..), .. }) | hir::Node::Item(hir::Item { - kind: hir::ItemKind::Impl(hir::Impl { ref generics, .. }), + kind: hir::ItemKind::Impl(hir::Impl { generics, .. }), .. }) => Some(generics), _ => None, @@ -1119,22 +1116,6 @@ impl Subdiagnostic for ReqIntroducedLocations { } } -pub struct MoreTargeted { - pub ident: Symbol, -} - -impl Subdiagnostic for MoreTargeted { - fn add_to_diag_with<G: EmissionGuarantee, F: SubdiagMessageOp<G>>( - self, - diag: &mut Diag<'_, G>, - _f: &F, - ) { - diag.code(E0772); - diag.primary_message(fluent::trait_selection_more_targeted); - diag.arg("ident", self.ident); - } -} - #[derive(Diagnostic)] #[diag(trait_selection_but_needs_to_satisfy, code = E0759)] pub struct ButNeedsToSatisfy { @@ -1151,9 +1132,6 @@ pub struct ButNeedsToSatisfy { #[note(trait_selection_introduced_by_bound)] pub bound: Option<Span>, - #[subdiagnostic] - pub req_introduces_loc: Option<ReqIntroducedLocations>, - pub has_param_name: bool, pub param_name: String, pub spans_empty: bool, diff --git a/compiler/rustc_trait_selection/src/solve/fulfill.rs b/compiler/rustc_trait_selection/src/solve/fulfill.rs index c238e708ab8..51d560d4c43 100644 --- a/compiler/rustc_trait_selection/src/solve/fulfill.rs +++ b/compiler/rustc_trait_selection/src/solve/fulfill.rs @@ -67,7 +67,9 @@ impl<'tcx> ObligationStorage<'tcx> { obligations } - fn unstalled_for_select(&mut self) -> impl Iterator<Item = PredicateObligation<'tcx>> { + fn unstalled_for_select( + &mut self, + ) -> impl Iterator<Item = PredicateObligation<'tcx>> + use<'tcx> { mem::take(&mut self.pending).into_iter() } diff --git a/compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs b/compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs index efe2386d014..740f44ebcad 100644 --- a/compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs +++ b/compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs @@ -698,11 +698,11 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for IllegalSelfTypeVisitor<'tcx> { ControlFlow::Continue(()) } } - ty::Alias(ty::Projection, ref data) if self.tcx.is_impl_trait_in_trait(data.def_id) => { + ty::Alias(ty::Projection, data) if self.tcx.is_impl_trait_in_trait(data.def_id) => { // We'll deny these later in their own pass ControlFlow::Continue(()) } - ty::Alias(ty::Projection, ref data) => { + ty::Alias(ty::Projection, data) => { match self.allow_self_projections { AllowSelfProjections::Yes => { // This is a projected type `<Foo as SomeTrait>::X`. |