From cfb8419900c1511b09320d70105128ce13de6e71 Mon Sep 17 00:00:00 2001 From: Michael Goulet Date: Mon, 23 Sep 2024 18:07:42 -0400 Subject: [PATCH 1/2] Separate collection of crate-local inherent impls from error reporting --- .../src/coherence/inherent_impls.rs | 34 ++++---- .../src/coherence/inherent_impls_overlap.rs | 3 +- .../rustc_hir_analysis/src/coherence/mod.rs | 6 +- .../src/hir_ty_lowering/errors.rs | 2 +- .../src/hir_ty_lowering/mod.rs | 2 +- compiler/rustc_hir_analysis/src/lib.rs | 2 +- compiler/rustc_hir_typeck/src/expr.rs | 1 - compiler/rustc_hir_typeck/src/method/probe.rs | 4 +- .../rustc_hir_typeck/src/method/suggest.rs | 11 +-- .../src/rmeta/decoder/cstore_impl.rs | 4 +- compiler/rustc_metadata/src/rmeta/encoder.rs | 4 +- compiler/rustc_middle/src/query/erase.rs | 6 ++ compiler/rustc_middle/src/query/mod.rs | 14 ++- compiler/rustc_middle/src/ty/trait_def.rs | 20 +---- compiler/rustc_monomorphize/src/collector.rs | 2 +- .../rustc_resolve/src/late/diagnostics.rs | 6 +- .../ui/const-generics/wrong-normalization.rs | 1 - .../const-generics/wrong-normalization.stderr | 16 +--- tests/ui/impl-trait/where-allowed.rs | 3 +- tests/ui/impl-trait/where-allowed.stderr | 86 ++++++++----------- tests/ui/traits/incoherent-impl-ambiguity.rs | 14 +++ .../traits/incoherent-impl-ambiguity.stderr | 11 +++ 22 files changed, 127 insertions(+), 125 deletions(-) create mode 100644 tests/ui/traits/incoherent-impl-ambiguity.rs create mode 100644 tests/ui/traits/incoherent-impl-ambiguity.stderr diff --git a/compiler/rustc_hir_analysis/src/coherence/inherent_impls.rs b/compiler/rustc_hir_analysis/src/coherence/inherent_impls.rs index c07d8009aa56c..dfb3c088afb0c 100644 --- a/compiler/rustc_hir_analysis/src/coherence/inherent_impls.rs +++ b/compiler/rustc_hir_analysis/src/coherence/inherent_impls.rs @@ -22,36 +22,38 @@ use crate::errors; pub(crate) fn crate_inherent_impls( tcx: TyCtxt<'_>, (): (), -) -> Result<&'_ CrateInherentImpls, ErrorGuaranteed> { +) -> (&'_ CrateInherentImpls, Result<(), ErrorGuaranteed>) { let mut collect = InherentCollect { tcx, impls_map: Default::default() }; + let mut res = Ok(()); for id in tcx.hir().items() { res = res.and(collect.check_item(id)); } - res?; - Ok(tcx.arena.alloc(collect.impls_map)) + + (tcx.arena.alloc(collect.impls_map), res) } -pub(crate) fn crate_incoherent_impls( +pub(crate) fn crate_inherent_impls_validity_check( tcx: TyCtxt<'_>, - simp: SimplifiedType, -) -> Result<&[DefId], ErrorGuaranteed> { - let crate_map = tcx.crate_inherent_impls(())?; - Ok(tcx.arena.alloc_from_iter( + (): (), +) -> Result<(), ErrorGuaranteed> { + tcx.crate_inherent_impls(()).1 +} + +pub(crate) fn crate_incoherent_impls(tcx: TyCtxt<'_>, simp: SimplifiedType) -> &[DefId] { + let (crate_map, _) = tcx.crate_inherent_impls(()); + tcx.arena.alloc_from_iter( crate_map.incoherent_impls.get(&simp).unwrap_or(&Vec::new()).iter().map(|d| d.to_def_id()), - )) + ) } /// On-demand query: yields a vector of the inherent impls for a specific type. -pub(crate) fn inherent_impls( - tcx: TyCtxt<'_>, - ty_def_id: LocalDefId, -) -> Result<&[DefId], ErrorGuaranteed> { - let crate_map = tcx.crate_inherent_impls(())?; - Ok(match crate_map.inherent_impls.get(&ty_def_id) { +pub(crate) fn inherent_impls(tcx: TyCtxt<'_>, ty_def_id: LocalDefId) -> &[DefId] { + let (crate_map, _) = tcx.crate_inherent_impls(()); + match crate_map.inherent_impls.get(&ty_def_id) { Some(v) => &v[..], None => &[], - }) + } } struct InherentCollect<'tcx> { diff --git a/compiler/rustc_hir_analysis/src/coherence/inherent_impls_overlap.rs b/compiler/rustc_hir_analysis/src/coherence/inherent_impls_overlap.rs index 43b9093ecac82..b8066b4b47d90 100644 --- a/compiler/rustc_hir_analysis/src/coherence/inherent_impls_overlap.rs +++ b/compiler/rustc_hir_analysis/src/coherence/inherent_impls_overlap.rs @@ -177,8 +177,7 @@ impl<'tcx> InherentOverlapChecker<'tcx> { return Ok(()); } - let impls = self.tcx.inherent_impls(id.owner_id)?; - + let impls = self.tcx.inherent_impls(id.owner_id); let overlap_mode = OverlapMode::get(self.tcx, id.owner_id.to_def_id()); let impls_items = impls diff --git a/compiler/rustc_hir_analysis/src/coherence/mod.rs b/compiler/rustc_hir_analysis/src/coherence/mod.rs index 185f3176f0789..b25406583f6c4 100644 --- a/compiler/rustc_hir_analysis/src/coherence/mod.rs +++ b/compiler/rustc_hir_analysis/src/coherence/mod.rs @@ -124,7 +124,10 @@ fn enforce_empty_impls_for_marker_traits( pub(crate) fn provide(providers: &mut Providers) { use self::builtin::coerce_unsized_info; - use self::inherent_impls::{crate_incoherent_impls, crate_inherent_impls, inherent_impls}; + use self::inherent_impls::{ + crate_incoherent_impls, crate_inherent_impls, crate_inherent_impls_validity_check, + inherent_impls, + }; use self::inherent_impls_overlap::crate_inherent_impls_overlap_check; use self::orphan::orphan_check_impl; @@ -133,6 +136,7 @@ pub(crate) fn provide(providers: &mut Providers) { crate_inherent_impls, crate_incoherent_impls, inherent_impls, + crate_inherent_impls_validity_check, crate_inherent_impls_overlap_check, coerce_unsized_info, orphan_check_impl, diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs index 5e3203e847368..5775a8867b16a 100644 --- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs +++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs @@ -1028,7 +1028,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { .. }) = node && let Some(ty_def_id) = qself_ty.ty_def_id() - && let Ok([inherent_impl]) = tcx.inherent_impls(ty_def_id) + && let [inherent_impl] = tcx.inherent_impls(ty_def_id) && let name = format!("{ident2}_{ident3}") && let Some(ty::AssocItem { kind: ty::AssocKind::Fn, .. }) = tcx .associated_items(inherent_impl) diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs index e95b5142559f4..d7d4a98e63fe6 100644 --- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs +++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs @@ -1272,7 +1272,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { } let candidates: Vec<_> = tcx - .inherent_impls(adt_did)? + .inherent_impls(adt_did) .iter() .filter_map(|&impl_| { let (item, scope) = diff --git a/compiler/rustc_hir_analysis/src/lib.rs b/compiler/rustc_hir_analysis/src/lib.rs index 1dc85c4903e37..92d85d48a42c0 100644 --- a/compiler/rustc_hir_analysis/src/lib.rs +++ b/compiler/rustc_hir_analysis/src/lib.rs @@ -170,7 +170,7 @@ pub fn check_crate(tcx: TyCtxt<'_>) { let _ = tcx.ensure().coherent_trait(trait_def_id); } // these queries are executed for side-effects (error reporting): - let _ = tcx.ensure().crate_inherent_impls(()); + let _ = tcx.ensure().crate_inherent_impls_validity_check(()); let _ = tcx.ensure().crate_inherent_impls_overlap_check(()); }); diff --git a/compiler/rustc_hir_typeck/src/expr.rs b/compiler/rustc_hir_typeck/src/expr.rs index 015a728325094..b34ed4640db12 100644 --- a/compiler/rustc_hir_typeck/src/expr.rs +++ b/compiler/rustc_hir_typeck/src/expr.rs @@ -2126,7 +2126,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { .tcx .inherent_impls(def_id) .into_iter() - .flatten() .flat_map(|i| self.tcx.associated_items(i).in_definition_order()) // Only assoc fn with no receivers. .filter(|item| { diff --git a/compiler/rustc_hir_typeck/src/method/probe.rs b/compiler/rustc_hir_typeck/src/method/probe.rs index 3828b40b88570..1a8afcf003d20 100644 --- a/compiler/rustc_hir_typeck/src/method/probe.rs +++ b/compiler/rustc_hir_typeck/src/method/probe.rs @@ -728,13 +728,13 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> { let Some(simp) = simplify_type(self.tcx, self_ty, TreatParams::InstantiateWithInfer) else { bug!("unexpected incoherent type: {:?}", self_ty) }; - for &impl_def_id in self.tcx.incoherent_impls(simp).into_iter().flatten() { + for &impl_def_id in self.tcx.incoherent_impls(simp).into_iter() { self.assemble_inherent_impl_probe(impl_def_id); } } fn assemble_inherent_impl_candidates_for_type(&mut self, def_id: DefId) { - let impl_def_ids = self.tcx.at(self.span).inherent_impls(def_id).into_iter().flatten(); + let impl_def_ids = self.tcx.at(self.span).inherent_impls(def_id).into_iter(); for &impl_def_id in impl_def_ids { self.assemble_inherent_impl_probe(impl_def_id); } diff --git a/compiler/rustc_hir_typeck/src/method/suggest.rs b/compiler/rustc_hir_typeck/src/method/suggest.rs index feb47209f5e7b..e03be4f43f73d 100644 --- a/compiler/rustc_hir_typeck/src/method/suggest.rs +++ b/compiler/rustc_hir_typeck/src/method/suggest.rs @@ -680,7 +680,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { self.tcx .inherent_impls(adt_def.did()) .into_iter() - .flatten() .any(|def_id| self.associated_value(*def_id, item_name).is_some()) } else { false @@ -1438,7 +1437,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { .tcx .inherent_impls(adt.did()) .into_iter() - .flatten() .copied() .filter(|def_id| { if let Some(assoc) = self.associated_value(*def_id, item_name) { @@ -1900,7 +1898,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { call_args: Option>>, ) -> Option { if let ty::Adt(adt, adt_args) = rcvr_ty.kind() { - for inherent_impl_did in self.tcx.inherent_impls(adt.did()).into_iter().flatten() { + for inherent_impl_did in self.tcx.inherent_impls(adt.did()).into_iter() { for inherent_method in self.tcx.associated_items(inherent_impl_did).in_definition_order() { @@ -2114,9 +2112,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { let ty::Adt(adt_def, _) = rcvr_ty.kind() else { return; }; - // FIXME(oli-obk): try out bubbling this error up one level and cancelling the other error in that case. - let Ok(impls) = self.tcx.inherent_impls(adt_def.did()) else { return }; - let mut items = impls + let mut items = self + .tcx + .inherent_impls(adt_def.did()) .iter() .flat_map(|i| self.tcx.associated_items(i).in_definition_order()) // Only assoc fn with no receivers and only if @@ -2495,7 +2493,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { .and_then(|simp| { tcx.incoherent_impls(simp) .into_iter() - .flatten() .find_map(|&id| self.associated_value(id, item_name)) }) .is_some() diff --git a/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs b/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs index 53d2089296d94..69707fdbe8fa1 100644 --- a/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs +++ b/compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs @@ -347,7 +347,7 @@ provide! { tcx, def_id, other, cdata, tcx.arena.alloc_from_iter(cdata.get_associated_item_or_field_def_ids(def_id.index)) } associated_item => { cdata.get_associated_item(def_id.index, tcx.sess) } - inherent_impls => { Ok(cdata.get_inherent_implementations_for_type(tcx, def_id.index)) } + inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) } item_attrs => { tcx.arena.alloc_from_iter(cdata.get_item_attrs(def_id.index, tcx.sess)) } is_mir_available => { cdata.is_item_mir_available(def_id.index) } is_ctfe_mir_available => { cdata.is_ctfe_mir_available(def_id.index) } @@ -393,7 +393,7 @@ provide! { tcx, def_id, other, cdata, traits => { tcx.arena.alloc_from_iter(cdata.get_traits()) } trait_impls_in_crate => { tcx.arena.alloc_from_iter(cdata.get_trait_impls()) } implementations_of_trait => { cdata.get_implementations_of_trait(tcx, other) } - crate_incoherent_impls => { Ok(cdata.get_incoherent_impls(tcx, other)) } + crate_incoherent_impls => { cdata.get_incoherent_impls(tcx, other) } dep_kind => { cdata.dep_kind } module_children => { diff --git a/compiler/rustc_metadata/src/rmeta/encoder.rs b/compiler/rustc_metadata/src/rmeta/encoder.rs index 891f179344181..5f756672b049e 100644 --- a/compiler/rustc_metadata/src/rmeta/encoder.rs +++ b/compiler/rustc_metadata/src/rmeta/encoder.rs @@ -1540,7 +1540,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> { } } - for (def_id, impls) in &tcx.crate_inherent_impls(()).unwrap().inherent_impls { + for (def_id, impls) in &tcx.crate_inherent_impls(()).0.inherent_impls { record_defaulted_array!(self.tables.inherent_impls[def_id.to_def_id()] <- impls.iter().map(|def_id| { assert!(def_id.is_local()); def_id.index @@ -2089,7 +2089,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> { let all_impls: Vec<_> = tcx .crate_inherent_impls(()) - .unwrap() + .0 .incoherent_impls .iter() .map(|(&simp, impls)| IncoherentImpls { diff --git a/compiler/rustc_middle/src/query/erase.rs b/compiler/rustc_middle/src/query/erase.rs index bd20e6aa00537..48bf4ffced0ce 100644 --- a/compiler/rustc_middle/src/query/erase.rs +++ b/compiler/rustc_middle/src/query/erase.rs @@ -1,6 +1,8 @@ use std::intrinsics::transmute_unchecked; use std::mem::MaybeUninit; +use rustc_span::ErrorGuaranteed; + use crate::query::CyclePlaceholder; use crate::ty::adjustment::CoerceUnsizedInfo; use crate::ty::{self, Ty}; @@ -216,6 +218,10 @@ impl EraseType for (&'_ T0, &'_ [T1]) { type Result = [u8; size_of::<(&'static (), &'static [()])>()]; } +impl EraseType for (&'_ T0, Result<(), ErrorGuaranteed>) { + type Result = [u8; size_of::<(&'static (), Result<(), ErrorGuaranteed>)>()]; +} + macro_rules! trivial { ($($ty:ty),+ $(,)?) => { $( diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs index 00036097ef50e..9609ef46d5c31 100644 --- a/compiler/rustc_middle/src/query/mod.rs +++ b/compiler/rustc_middle/src/query/mod.rs @@ -881,13 +881,13 @@ rustc_queries! { /// Maps a `DefId` of a type to a list of its inherent impls. /// Contains implementations of methods that are inherent to a type. /// Methods in these implementations don't need to be exported. - query inherent_impls(key: DefId) -> Result<&'tcx [DefId], ErrorGuaranteed> { + query inherent_impls(key: DefId) -> &'tcx [DefId] { desc { |tcx| "collecting inherent impls for `{}`", tcx.def_path_str(key) } cache_on_disk_if { key.is_local() } separate_provide_extern } - query incoherent_impls(key: SimplifiedType) -> Result<&'tcx [DefId], ErrorGuaranteed> { + query incoherent_impls(key: SimplifiedType) -> &'tcx [DefId] { desc { |tcx| "collecting all inherent impls for `{:?}`", key } } @@ -1017,8 +1017,14 @@ rustc_queries! { /// Gets a complete map from all types to their inherent impls. /// Not meant to be used directly outside of coherence. - query crate_inherent_impls(k: ()) -> Result<&'tcx CrateInherentImpls, ErrorGuaranteed> { + query crate_inherent_impls(k: ()) -> (&'tcx CrateInherentImpls, Result<(), ErrorGuaranteed>) { desc { "finding all inherent impls defined in crate" } + } + + /// Checks all types in the crate for overlap in their inherent impls. Reports errors. + /// Not meant to be used directly outside of coherence. + query crate_inherent_impls_validity_check(_: ()) -> Result<(), ErrorGuaranteed> { + desc { "check for inherent impls that should not be defined in crate" } ensure_forwards_result_if_red } @@ -1715,7 +1721,7 @@ rustc_queries! { /// /// Do not call this directly, but instead use the `incoherent_impls` query. /// This query is only used to get the data necessary for that query. - query crate_incoherent_impls(key: (CrateNum, SimplifiedType)) -> Result<&'tcx [DefId], ErrorGuaranteed> { + query crate_incoherent_impls(key: (CrateNum, SimplifiedType)) -> &'tcx [DefId] { desc { |tcx| "collecting all impls for a type in a crate" } separate_provide_extern } diff --git a/compiler/rustc_middle/src/ty/trait_def.rs b/compiler/rustc_middle/src/ty/trait_def.rs index 82690f70e5f18..188107e5d5498 100644 --- a/compiler/rustc_middle/src/ty/trait_def.rs +++ b/compiler/rustc_middle/src/ty/trait_def.rs @@ -253,30 +253,16 @@ pub(super) fn trait_impls_of_provider(tcx: TyCtxt<'_>, trait_id: DefId) -> Trait } /// Query provider for `incoherent_impls`. -pub(super) fn incoherent_impls_provider( - tcx: TyCtxt<'_>, - simp: SimplifiedType, -) -> Result<&[DefId], ErrorGuaranteed> { +pub(super) fn incoherent_impls_provider(tcx: TyCtxt<'_>, simp: SimplifiedType) -> &[DefId] { let mut impls = Vec::new(); - - let mut res = Ok(()); for cnum in iter::once(LOCAL_CRATE).chain(tcx.crates(()).iter().copied()) { - let incoherent_impls = match tcx.crate_incoherent_impls((cnum, simp)) { - Ok(impls) => impls, - Err(e) => { - res = Err(e); - continue; - } - }; - for &impl_def_id in incoherent_impls { + for &impl_def_id in tcx.crate_incoherent_impls((cnum, simp)) { impls.push(impl_def_id) } } - debug!(?impls); - res?; - Ok(tcx.arena.alloc_slice(&impls)) + tcx.arena.alloc_slice(&impls) } pub(super) fn traits_provider(tcx: TyCtxt<'_>, _: LocalCrate) -> &[DefId] { diff --git a/compiler/rustc_monomorphize/src/collector.rs b/compiler/rustc_monomorphize/src/collector.rs index 8d137b8d8f9f1..ee6b56ca753d5 100644 --- a/compiler/rustc_monomorphize/src/collector.rs +++ b/compiler/rustc_monomorphize/src/collector.rs @@ -1183,7 +1183,7 @@ fn collect_alloc<'tcx>(tcx: TyCtxt<'tcx>, alloc_id: AllocId, output: &mut MonoIt } fn assoc_fn_of_type<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId, fn_ident: Ident) -> Option { - for impl_def_id in tcx.inherent_impls(def_id).ok()? { + for impl_def_id in tcx.inherent_impls(def_id) { if let Some(new) = tcx.associated_items(impl_def_id).find_by_name_and_kind( tcx, fn_ident, diff --git a/compiler/rustc_resolve/src/late/diagnostics.rs b/compiler/rustc_resolve/src/late/diagnostics.rs index 7ea057c7b4bcb..35d166e8b4ab3 100644 --- a/compiler/rustc_resolve/src/late/diagnostics.rs +++ b/compiler/rustc_resolve/src/late/diagnostics.rs @@ -1825,10 +1825,12 @@ impl<'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'_, 'ast, 'ra, 'tcx> { // Doing analysis on local `DefId`s would cause infinite recursion. return; } - let Ok(impls) = self.r.tcx.inherent_impls(def_id) else { return }; // Look at all the associated functions without receivers in the type's // inherent impls to look for builders that return `Self` - let mut items = impls + let mut items = self + .r + .tcx + .inherent_impls(def_id) .iter() .flat_map(|i| self.r.tcx.associated_items(i).in_definition_order()) // Only assoc fn with no receivers. diff --git a/tests/ui/const-generics/wrong-normalization.rs b/tests/ui/const-generics/wrong-normalization.rs index 8b2323e3d479c..f1ce317b3f78b 100644 --- a/tests/ui/const-generics/wrong-normalization.rs +++ b/tests/ui/const-generics/wrong-normalization.rs @@ -15,6 +15,5 @@ pub struct I8; impl as Identity>::Identity { //~^ ERROR no nominal type found for inherent implementation -//~| ERROR no associated item named `MIN` found for type `i8` pub fn foo(&self) {} } diff --git a/tests/ui/const-generics/wrong-normalization.stderr b/tests/ui/const-generics/wrong-normalization.stderr index 379a5593dd640..2f8dfc895b279 100644 --- a/tests/ui/const-generics/wrong-normalization.stderr +++ b/tests/ui/const-generics/wrong-normalization.stderr @@ -6,18 +6,6 @@ LL | impl as Identity>::Identity { | = note: either implement a trait on it or create a newtype to wrap it instead -error[E0599]: no associated item named `MIN` found for type `i8` in the current scope - --> $DIR/wrong-normalization.rs:16:15 - | -LL | impl as Identity>::Identity { - | ^^^ associated item not found in `i8` - | -help: you are looking for the module in `std`, not the primitive type - | -LL | impl as Identity>::Identity { - | +++++ - -error: aborting due to 2 previous errors +error: aborting due to 1 previous error -Some errors have detailed explanations: E0118, E0599. -For more information about an error, try `rustc --explain E0118`. +For more information about this error, try `rustc --explain E0118`. diff --git a/tests/ui/impl-trait/where-allowed.rs b/tests/ui/impl-trait/where-allowed.rs index 72ce617693e40..3f435f0f443b4 100644 --- a/tests/ui/impl-trait/where-allowed.rs +++ b/tests/ui/impl-trait/where-allowed.rs @@ -42,7 +42,7 @@ fn in_dyn_Fn_return_in_parameters(_: &dyn Fn() -> impl Debug) { panic!() } fn in_dyn_Fn_parameter_in_return() -> &'static dyn Fn(impl Debug) { panic!() } //~^ ERROR `impl Trait` is not allowed in the parameters of `Fn` trait bounds -// Allowed +// Allowed (but it's still ambiguous; nothing constrains the RPIT in this body). fn in_dyn_Fn_return_in_return() -> &'static dyn Fn() -> impl Debug { panic!() } //~^ ERROR: type annotations needed @@ -79,7 +79,6 @@ fn in_impl_Trait_in_parameters(_: impl Iterator) { panic!( // Allowed fn in_impl_Trait_in_return() -> impl IntoIterator { vec![vec![0; 10], vec![12; 7], vec![8; 3]] - //~^ ERROR: no function or associated item named `into_vec` found for slice `[_]` } // Disallowed diff --git a/tests/ui/impl-trait/where-allowed.stderr b/tests/ui/impl-trait/where-allowed.stderr index 1fb69db98c162..2770a6cc40e59 100644 --- a/tests/ui/impl-trait/where-allowed.stderr +++ b/tests/ui/impl-trait/where-allowed.stderr @@ -17,7 +17,7 @@ LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic | outer `impl Trait` error[E0658]: `impl Trait` in associated types is unstable - --> $DIR/where-allowed.rs:122:16 + --> $DIR/where-allowed.rs:121:16 | LL | type Out = impl Debug; | ^^^^^^^^^^ @@ -27,7 +27,7 @@ LL | type Out = impl Debug; = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date error[E0658]: `impl Trait` in type aliases is unstable - --> $DIR/where-allowed.rs:159:23 + --> $DIR/where-allowed.rs:158:23 | LL | type InTypeAlias = impl Debug; | ^^^^^^^^^^ @@ -37,7 +37,7 @@ LL | type InTypeAlias = impl Debug; = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date error[E0658]: `impl Trait` in type aliases is unstable - --> $DIR/where-allowed.rs:162:39 + --> $DIR/where-allowed.rs:161:39 | LL | type InReturnInTypeAlias = fn() -> impl Debug; | ^^^^^^^^^^ @@ -143,7 +143,7 @@ LL | fn in_Fn_return_in_generics impl Debug> (_: F) { panic!() } = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in field types - --> $DIR/where-allowed.rs:86:32 + --> $DIR/where-allowed.rs:85:32 | LL | struct InBraceStructField { x: impl Debug } | ^^^^^^^^^^ @@ -151,7 +151,7 @@ LL | struct InBraceStructField { x: impl Debug } = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in field types - --> $DIR/where-allowed.rs:90:41 + --> $DIR/where-allowed.rs:89:41 | LL | struct InAdtInBraceStructField { x: Vec } | ^^^^^^^^^^ @@ -159,7 +159,7 @@ LL | struct InAdtInBraceStructField { x: Vec } = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in field types - --> $DIR/where-allowed.rs:94:27 + --> $DIR/where-allowed.rs:93:27 | LL | struct InTupleStructField(impl Debug); | ^^^^^^^^^^ @@ -167,7 +167,7 @@ LL | struct InTupleStructField(impl Debug); = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in field types - --> $DIR/where-allowed.rs:99:25 + --> $DIR/where-allowed.rs:98:25 | LL | InBraceVariant { x: impl Debug }, | ^^^^^^^^^^ @@ -175,7 +175,7 @@ LL | InBraceVariant { x: impl Debug }, = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in field types - --> $DIR/where-allowed.rs:101:20 + --> $DIR/where-allowed.rs:100:20 | LL | InTupleVariant(impl Debug), | ^^^^^^^^^^ @@ -183,7 +183,7 @@ LL | InTupleVariant(impl Debug), = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in `extern fn` parameters - --> $DIR/where-allowed.rs:143:33 + --> $DIR/where-allowed.rs:142:33 | LL | fn in_foreign_parameters(_: impl Debug); | ^^^^^^^^^^ @@ -191,7 +191,7 @@ LL | fn in_foreign_parameters(_: impl Debug); = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in `extern fn` return types - --> $DIR/where-allowed.rs:146:31 + --> $DIR/where-allowed.rs:145:31 | LL | fn in_foreign_return() -> impl Debug; | ^^^^^^^^^^ @@ -199,7 +199,7 @@ LL | fn in_foreign_return() -> impl Debug; = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in `fn` pointer return types - --> $DIR/where-allowed.rs:162:39 + --> $DIR/where-allowed.rs:161:39 | LL | type InReturnInTypeAlias = fn() -> impl Debug; | ^^^^^^^^^^ @@ -207,7 +207,7 @@ LL | type InReturnInTypeAlias = fn() -> impl Debug; = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in traits - --> $DIR/where-allowed.rs:167:16 + --> $DIR/where-allowed.rs:166:16 | LL | impl PartialEq for () { | ^^^^^^^^^^ @@ -215,7 +215,7 @@ LL | impl PartialEq for () { = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in impl headers - --> $DIR/where-allowed.rs:172:24 + --> $DIR/where-allowed.rs:171:24 | LL | impl PartialEq<()> for impl Debug { | ^^^^^^^^^^ @@ -223,7 +223,7 @@ LL | impl PartialEq<()> for impl Debug { = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in impl headers - --> $DIR/where-allowed.rs:177:6 + --> $DIR/where-allowed.rs:176:6 | LL | impl impl Debug { | ^^^^^^^^^^ @@ -231,7 +231,7 @@ LL | impl impl Debug { = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in impl headers - --> $DIR/where-allowed.rs:183:24 + --> $DIR/where-allowed.rs:182:24 | LL | impl InInherentImplAdt { | ^^^^^^^^^^ @@ -239,7 +239,7 @@ LL | impl InInherentImplAdt { = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in bounds - --> $DIR/where-allowed.rs:189:11 + --> $DIR/where-allowed.rs:188:11 | LL | where impl Debug: Debug | ^^^^^^^^^^ @@ -247,7 +247,7 @@ LL | where impl Debug: Debug = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in bounds - --> $DIR/where-allowed.rs:196:15 + --> $DIR/where-allowed.rs:195:15 | LL | where Vec: Debug | ^^^^^^^^^^ @@ -255,7 +255,7 @@ LL | where Vec: Debug = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in bounds - --> $DIR/where-allowed.rs:203:24 + --> $DIR/where-allowed.rs:202:24 | LL | where T: PartialEq | ^^^^^^^^^^ @@ -263,7 +263,7 @@ LL | where T: PartialEq = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in the parameters of `Fn` trait bounds - --> $DIR/where-allowed.rs:210:17 + --> $DIR/where-allowed.rs:209:17 | LL | where T: Fn(impl Debug) | ^^^^^^^^^^ @@ -271,7 +271,7 @@ LL | where T: Fn(impl Debug) = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds - --> $DIR/where-allowed.rs:217:22 + --> $DIR/where-allowed.rs:216:22 | LL | where T: Fn() -> impl Debug | ^^^^^^^^^^ @@ -279,7 +279,7 @@ LL | where T: Fn() -> impl Debug = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in generic parameter defaults - --> $DIR/where-allowed.rs:223:40 + --> $DIR/where-allowed.rs:222:40 | LL | struct InStructGenericParamDefault(T); | ^^^^^^^^^^ @@ -287,7 +287,7 @@ LL | struct InStructGenericParamDefault(T); = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in generic parameter defaults - --> $DIR/where-allowed.rs:227:36 + --> $DIR/where-allowed.rs:226:36 | LL | enum InEnumGenericParamDefault { Variant(T) } | ^^^^^^^^^^ @@ -295,7 +295,7 @@ LL | enum InEnumGenericParamDefault { Variant(T) } = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in generic parameter defaults - --> $DIR/where-allowed.rs:231:38 + --> $DIR/where-allowed.rs:230:38 | LL | trait InTraitGenericParamDefault {} | ^^^^^^^^^^ @@ -303,7 +303,7 @@ LL | trait InTraitGenericParamDefault {} = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in generic parameter defaults - --> $DIR/where-allowed.rs:235:41 + --> $DIR/where-allowed.rs:234:41 | LL | type InTypeAliasGenericParamDefault = T; | ^^^^^^^^^^ @@ -311,7 +311,7 @@ LL | type InTypeAliasGenericParamDefault = T; = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in generic parameter defaults - --> $DIR/where-allowed.rs:239:11 + --> $DIR/where-allowed.rs:238:11 | LL | impl T {} | ^^^^^^^^^^ @@ -319,7 +319,7 @@ LL | impl T {} = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in generic parameter defaults - --> $DIR/where-allowed.rs:246:40 + --> $DIR/where-allowed.rs:245:40 | LL | fn in_method_generic_param_default(_: T) {} | ^^^^^^^^^^ @@ -327,7 +327,7 @@ LL | fn in_method_generic_param_default(_: T) {} = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in the type of variable bindings - --> $DIR/where-allowed.rs:252:29 + --> $DIR/where-allowed.rs:251:29 | LL | let _in_local_variable: impl Fn() = || {}; | ^^^^^^^^^ @@ -335,7 +335,7 @@ LL | let _in_local_variable: impl Fn() = || {}; = note: `impl Trait` is only allowed in arguments and return types of functions and methods error[E0562]: `impl Trait` is not allowed in closure return types - --> $DIR/where-allowed.rs:254:46 + --> $DIR/where-allowed.rs:253:46 | LL | let _in_return_in_local_variable = || -> impl Fn() { || {} }; | ^^^^^^^^^ @@ -363,7 +363,7 @@ LL | fn in_impl_Fn_return_in_return() -> &'static impl Fn() -> impl Debug { pani where Args: Tuple, F: Fn, A: Allocator, F: ?Sized; error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions - --> $DIR/where-allowed.rs:239:7 + --> $DIR/where-allowed.rs:238:7 | LL | impl T {} | ^^^^^^^^^^^^^^ @@ -373,25 +373,15 @@ LL | impl T {} = note: `#[deny(invalid_type_param_default)]` on by default error[E0118]: no nominal type found for inherent implementation - --> $DIR/where-allowed.rs:239:1 + --> $DIR/where-allowed.rs:238:1 | LL | impl T {} | ^^^^^^^^^^^^^^^^^^^^^^^ impl requires a nominal type | = note: either implement a trait on it or create a newtype to wrap it instead -error[E0599]: no function or associated item named `into_vec` found for slice `[_]` in the current scope - --> $DIR/where-allowed.rs:81:5 - | -LL | vec![vec![0; 10], vec![12; 7], vec![8; 3]] - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function or associated item not found in `[_]` - | -help: there is an associated function `to_vec` with a similar name - --> $SRC_DIR/alloc/src/slice.rs:LL:COL - = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info) - error[E0053]: method `in_trait_impl_return` has an incompatible type for trait - --> $DIR/where-allowed.rs:129:34 + --> $DIR/where-allowed.rs:128:34 | LL | type Out = impl Debug; | ---------- the expected opaque type @@ -400,7 +390,7 @@ LL | fn in_trait_impl_return() -> impl Debug { () } | ^^^^^^^^^^ expected opaque type, found a different opaque type | note: type in trait - --> $DIR/where-allowed.rs:119:34 + --> $DIR/where-allowed.rs:118:34 | LL | fn in_trait_impl_return() -> Self::Out; | ^^^^^^^^^ @@ -413,7 +403,7 @@ LL | fn in_trait_impl_return() -> <() as DummyTrait>::Out { () } | ~~~~~~~~~~~~~~~~~~~~~~~ error: unconstrained opaque type - --> $DIR/where-allowed.rs:122:16 + --> $DIR/where-allowed.rs:121:16 | LL | type Out = impl Debug; | ^^^^^^^^^^ @@ -421,7 +411,7 @@ LL | type Out = impl Debug; = note: `Out` must be used in combination with a concrete type within the same impl error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions - --> $DIR/where-allowed.rs:246:36 + --> $DIR/where-allowed.rs:245:36 | LL | fn in_method_generic_param_default(_: T) {} | ^^^^^^^^^^^^^^ @@ -429,13 +419,13 @@ LL | fn in_method_generic_param_default(_: T) {} = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #36887 -error: aborting due to 50 previous errors +error: aborting due to 49 previous errors -Some errors have detailed explanations: E0053, E0118, E0283, E0562, E0599, E0658, E0666. +Some errors have detailed explanations: E0053, E0118, E0283, E0562, E0658, E0666. For more information about an error, try `rustc --explain E0053`. Future incompatibility report: Future breakage diagnostic: error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions - --> $DIR/where-allowed.rs:239:7 + --> $DIR/where-allowed.rs:238:7 | LL | impl T {} | ^^^^^^^^^^^^^^ @@ -446,7 +436,7 @@ LL | impl T {} Future breakage diagnostic: error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions - --> $DIR/where-allowed.rs:246:36 + --> $DIR/where-allowed.rs:245:36 | LL | fn in_method_generic_param_default(_: T) {} | ^^^^^^^^^^^^^^ diff --git a/tests/ui/traits/incoherent-impl-ambiguity.rs b/tests/ui/traits/incoherent-impl-ambiguity.rs new file mode 100644 index 0000000000000..b5fed95e11c44 --- /dev/null +++ b/tests/ui/traits/incoherent-impl-ambiguity.rs @@ -0,0 +1,14 @@ +// Make sure that an invalid inherent impl doesn't totally clobber all of the +// other inherent impls, which lead to mysterious method/assoc-item probing errors. + +impl () {} +//~^ ERROR cannot define inherent `impl` for primitive types + +struct W; +impl W { + const CONST: u32 = 0; +} + +fn main() { + let _ = W::CONST; +} diff --git a/tests/ui/traits/incoherent-impl-ambiguity.stderr b/tests/ui/traits/incoherent-impl-ambiguity.stderr new file mode 100644 index 0000000000000..9c050a7295581 --- /dev/null +++ b/tests/ui/traits/incoherent-impl-ambiguity.stderr @@ -0,0 +1,11 @@ +error[E0390]: cannot define inherent `impl` for primitive types + --> $DIR/incoherent-impl-ambiguity.rs:4:1 + | +LL | impl () {} + | ^^^^^^^ + | + = help: consider using an extension trait instead + +error: aborting due to 1 previous error + +For more information about this error, try `rustc --explain E0390`. From 28f69805de661551d3bba35bd2c6df96777e2df2 Mon Sep 17 00:00:00 2001 From: Michael Goulet Date: Tue, 24 Sep 2024 10:11:23 -0400 Subject: [PATCH 2/2] Fix tools --- src/librustdoc/clean/inline.rs | 4 ++-- src/librustdoc/clean/types.rs | 4 ++-- src/librustdoc/passes/collect_intra_doc_links.rs | 1 - src/tools/clippy/clippy_lints/src/derive.rs | 1 - src/tools/clippy/clippy_lints/src/inherent_impl.rs | 4 +--- src/tools/clippy/clippy_lints/src/len_zero.rs | 3 +-- src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs | 1 - src/tools/clippy/clippy_utils/src/lib.rs | 8 ++------ src/tools/clippy/clippy_utils/src/ty.rs | 2 +- 9 files changed, 9 insertions(+), 19 deletions(-) diff --git a/src/librustdoc/clean/inline.rs b/src/librustdoc/clean/inline.rs index 701bf61809673..b7d6b3dda72b4 100644 --- a/src/librustdoc/clean/inline.rs +++ b/src/librustdoc/clean/inline.rs @@ -373,7 +373,7 @@ pub(crate) fn build_impls( let tcx = cx.tcx; // for each implementation of an item represented by `did`, build the clean::Item for that impl - for &did in tcx.inherent_impls(did).into_iter().flatten() { + for &did in tcx.inherent_impls(did).into_iter() { cx.with_param_env(did, |cx| { build_impl(cx, did, attrs, ret); }); @@ -388,7 +388,7 @@ pub(crate) fn build_impls( if tcx.has_attr(did, sym::rustc_has_incoherent_inherent_impls) { let type_ = if tcx.is_trait(did) { SimplifiedType::Trait(did) } else { SimplifiedType::Adt(did) }; - for &did in tcx.incoherent_impls(type_).into_iter().flatten() { + for &did in tcx.incoherent_impls(type_).into_iter() { cx.with_param_env(did, |cx| { build_impl(cx, did, attrs, ret); }); diff --git a/src/librustdoc/clean/types.rs b/src/librustdoc/clean/types.rs index 31710bc014af4..986406c1e403a 100644 --- a/src/librustdoc/clean/types.rs +++ b/src/librustdoc/clean/types.rs @@ -1863,7 +1863,7 @@ impl PrimitiveType { .get(self) .into_iter() .flatten() - .flat_map(move |&simp| tcx.incoherent_impls(simp).into_iter().flatten()) + .flat_map(move |&simp| tcx.incoherent_impls(simp).into_iter()) .copied() } @@ -1871,7 +1871,7 @@ impl PrimitiveType { Self::simplified_types() .values() .flatten() - .flat_map(move |&simp| tcx.incoherent_impls(simp).into_iter().flatten()) + .flat_map(move |&simp| tcx.incoherent_impls(simp).into_iter()) .copied() } diff --git a/src/librustdoc/passes/collect_intra_doc_links.rs b/src/librustdoc/passes/collect_intra_doc_links.rs index ddc80ea7cb128..29342dcac592b 100644 --- a/src/librustdoc/passes/collect_intra_doc_links.rs +++ b/src/librustdoc/passes/collect_intra_doc_links.rs @@ -608,7 +608,6 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> { let mut assoc_items: Vec<_> = tcx .inherent_impls(did) .into_iter() - .flatten() .flat_map(|&imp| { filter_assoc_items_by_name_and_namespace( tcx, diff --git a/src/tools/clippy/clippy_lints/src/derive.rs b/src/tools/clippy/clippy_lints/src/derive.rs index 636698e96f6d1..649c480fb92a1 100644 --- a/src/tools/clippy/clippy_lints/src/derive.rs +++ b/src/tools/clippy/clippy_lints/src/derive.rs @@ -386,7 +386,6 @@ fn check_unsafe_derive_deserialize<'tcx>( .tcx .inherent_impls(def.did()) .into_iter() - .flatten() .map(|imp_did| cx.tcx.hir().expect_item(imp_did.expect_local())) .any(|imp| has_unsafe(cx, imp)) { diff --git a/src/tools/clippy/clippy_lints/src/inherent_impl.rs b/src/tools/clippy/clippy_lints/src/inherent_impl.rs index d39f910f9936d..309d2dfb28b87 100644 --- a/src/tools/clippy/clippy_lints/src/inherent_impl.rs +++ b/src/tools/clippy/clippy_lints/src/inherent_impl.rs @@ -51,9 +51,7 @@ impl<'tcx> LateLintPass<'tcx> for MultipleInherentImpl { // List of spans to lint. (lint_span, first_span) let mut lint_spans = Vec::new(); - let Ok(impls) = cx.tcx.crate_inherent_impls(()) else { - return; - }; + let (impls, _) = cx.tcx.crate_inherent_impls(()); for (&id, impl_ids) in &impls.inherent_impls { if impl_ids.len() < 2 diff --git a/src/tools/clippy/clippy_lints/src/len_zero.rs b/src/tools/clippy/clippy_lints/src/len_zero.rs index 0bc7fc2dd9d1e..16f86b18e2e55 100644 --- a/src/tools/clippy/clippy_lints/src/len_zero.rs +++ b/src/tools/clippy/clippy_lints/src/len_zero.rs @@ -448,7 +448,6 @@ fn check_for_is_empty( .tcx .inherent_impls(impl_ty) .into_iter() - .flatten() .flat_map(|&id| cx.tcx.associated_items(id).filter_by_name_unhygienic(is_empty)) .find(|item| item.kind == AssocKind::Fn); @@ -616,7 +615,7 @@ fn has_is_empty(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool { /// Checks the inherent impl's items for an `is_empty(self)` method. fn has_is_empty_impl(cx: &LateContext<'_>, id: DefId) -> bool { let is_empty = sym!(is_empty); - cx.tcx.inherent_impls(id).into_iter().flatten().any(|imp| { + cx.tcx.inherent_impls(id).into_iter().any(|imp| { cx.tcx .associated_items(*imp) .filter_by_name_unhygienic(is_empty) diff --git a/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs b/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs index e4326cb958e5f..af71799f0a731 100644 --- a/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs +++ b/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs @@ -78,7 +78,6 @@ pub(super) fn check<'tcx>( cx.tcx .inherent_impls(adt_def.did()) .into_iter() - .flatten() .flat_map(|impl_id| cx.tcx.associated_items(impl_id).filter_by_name_unhygienic(sugg)) .find_map(|assoc| { if assoc.fn_has_self_parameter diff --git a/src/tools/clippy/clippy_utils/src/lib.rs b/src/tools/clippy/clippy_utils/src/lib.rs index 0d0d6219c5e05..aed0bc565d8e9 100644 --- a/src/tools/clippy/clippy_utils/src/lib.rs +++ b/src/tools/clippy/clippy_utils/src/lib.rs @@ -589,14 +589,11 @@ fn find_primitive_impls<'tcx>(tcx: TyCtxt<'tcx>, name: &str) -> impl Iterator SimplifiedType::Float(FloatTy::F32), "f64" => SimplifiedType::Float(FloatTy::F64), _ => { - return Result::<&[_], rustc_errors::ErrorGuaranteed>::Ok(&[]) - .into_iter() - .flatten() - .copied(); + return [].iter().copied(); }, }; - tcx.incoherent_impls(ty).into_iter().flatten().copied() + tcx.incoherent_impls(ty).into_iter().copied() } fn non_local_item_children_by_name(tcx: TyCtxt<'_>, def_id: DefId, name: Symbol) -> Vec { @@ -721,7 +718,6 @@ pub fn def_path_res(tcx: TyCtxt<'_>, path: &[&str]) -> Vec { let inherent_impl_children = tcx .inherent_impls(def_id) .into_iter() - .flatten() .flat_map(|&impl_def_id| item_children_by_name(tcx, impl_def_id, segment)); let direct_children = item_children_by_name(tcx, def_id, segment); diff --git a/src/tools/clippy/clippy_utils/src/ty.rs b/src/tools/clippy/clippy_utils/src/ty.rs index 585134209ca3a..22aaaa1b73419 100644 --- a/src/tools/clippy/clippy_utils/src/ty.rs +++ b/src/tools/clippy/clippy_utils/src/ty.rs @@ -1316,7 +1316,7 @@ pub fn deref_chain<'cx, 'tcx>(cx: &'cx LateContext<'tcx>, ty: Ty<'tcx>) -> impl /// If you need this, you should wrap this call in `clippy_utils::ty::deref_chain().any(...)`. pub fn get_adt_inherent_method<'a>(cx: &'a LateContext<'_>, ty: Ty<'_>, method_name: Symbol) -> Option<&'a AssocItem> { if let Some(ty_did) = ty.ty_adt_def().map(AdtDef::did) { - cx.tcx.inherent_impls(ty_did).into_iter().flatten().find_map(|&did| { + cx.tcx.inherent_impls(ty_did).into_iter().find_map(|&did| { cx.tcx .associated_items(did) .filter_by_name_unhygienic(method_name)