Auto merge of #120100 - oli-obk:astconv_lifetimes, r=BoxyUwU

Don't forget that the lifetime on hir types is `'tcx`

This PR just tracks the `'tcx` lifetime to wherever the original objects actually have that lifetime. This code is needed for #107606 (now #120131) so that `ast_ty_to_ty` can invoke `lit_to_const` on an argument passed to it. Currently the argument is `&hir::Ty<'_>`, but after this PR it is `&'tcx hir::Ty<'tcx>`.

Author: bors

compiler/rustc_hir/src/hir.rs

@@ -248,7 +248,7 @@ pub struct InferArg {
 }
 
 impl InferArg {
-    pub fn to_ty(&self) -> Ty<'_> {
+    pub fn to_ty(&self) -> Ty<'static> {
         Ty { kind: TyKind::Infer, span: self.span, hir_id: self.hir_id }
     }
 }

compiler/rustc_hir_analysis/src/astconv/bounds.rs

@@ -108,14 +108,16 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
     /// `param_ty` and `ast_bounds`. See `instantiate_poly_trait_ref`
     /// for more details.
     #[instrument(level = "debug", skip(self, ast_bounds, bounds))]
-    pub(crate) fn add_bounds<'hir, I: Iterator<Item = &'hir hir::GenericBound<'hir>>>(
+    pub(crate) fn add_bounds<'hir, I: Iterator<Item = &'hir hir::GenericBound<'tcx>>>(
         &self,
         param_ty: Ty<'tcx>,
         ast_bounds: I,
         bounds: &mut Bounds<'tcx>,
         bound_vars: &'tcx ty::List<ty::BoundVariableKind>,
         only_self_bounds: OnlySelfBounds,
-    ) {
+    ) where
+        'tcx: 'hir,
+    {
         for ast_bound in ast_bounds {
             match ast_bound {
                 hir::GenericBound::Trait(poly_trait_ref, modifier) => {
@@ -179,7 +181,7 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
     pub(crate) fn compute_bounds(
         &self,
         param_ty: Ty<'tcx>,
-        ast_bounds: &[hir::GenericBound<'_>],
+        ast_bounds: &[hir::GenericBound<'tcx>],
         filter: PredicateFilter,
     ) -> Bounds<'tcx> {
         let mut bounds = Bounds::default();

compiler/rustc_hir_analysis/src/astconv/generics.rs

@@ -168,7 +168,7 @@ fn generic_arg_mismatch_err(
 ///   instantiate a `GenericArg`.
 /// - `inferred_kind`: if no parameter was provided, and inference is enabled, then
 ///   creates a suitable inference variable.
-pub fn create_args_for_parent_generic_args<'tcx, 'a>(
+pub fn create_args_for_parent_generic_args<'tcx: 'a, 'a>(
     tcx: TyCtxt<'tcx>,
     def_id: DefId,
     parent_args: &[ty::GenericArg<'tcx>],

compiler/rustc_hir_analysis/src/astconv/mod.rs

@@ -122,7 +122,7 @@ pub trait AstConv<'tcx> {
         &self,
         span: Span,
         item_def_id: DefId,
-        item_segment: &hir::PathSegment<'_>,
+        item_segment: &hir::PathSegment<'tcx>,
         poly_trait_ref: ty::PolyTraitRef<'tcx>,
     ) -> Ty<'tcx>;
 
@@ -156,14 +156,14 @@ struct ConvertedBinding<'a, 'tcx> {
     hir_id: hir::HirId,
     item_name: Ident,
     kind: ConvertedBindingKind<'a, 'tcx>,
-    gen_args: &'a GenericArgs<'a>,
+    gen_args: &'tcx GenericArgs<'tcx>,
     span: Span,
 }
 
 #[derive(Debug)]
 enum ConvertedBindingKind<'a, 'tcx> {
     Equality(Spanned<ty::Term<'tcx>>),
-    Constraint(&'a [hir::GenericBound<'a>]),
+    Constraint(&'a [hir::GenericBound<'tcx>]),
 }
 
 /// New-typed boolean indicating whether explicit late-bound lifetimes
@@ -215,12 +215,12 @@ pub struct GenericArgCountResult {
 }
 
 pub trait CreateSubstsForGenericArgsCtxt<'a, 'tcx> {
-    fn args_for_def_id(&mut self, def_id: DefId) -> (Option<&'a GenericArgs<'a>>, bool);
+    fn args_for_def_id(&mut self, def_id: DefId) -> (Option<&'a GenericArgs<'tcx>>, bool);
 
     fn provided_kind(
         &mut self,
         param: &ty::GenericParamDef,
-        arg: &GenericArg<'_>,
+        arg: &GenericArg<'tcx>,
     ) -> ty::GenericArg<'tcx>;
 
     fn inferred_kind(
@@ -294,7 +294,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         &self,
         span: Span,
         def_id: DefId,
-        item_segment: &hir::PathSegment<'_>,
+        item_segment: &hir::PathSegment<'tcx>,
     ) -> GenericArgsRef<'tcx> {
         let (args, _) = self.create_args_for_ast_path(
             span,
@@ -351,7 +351,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         def_id: DefId,
         parent_args: &[ty::GenericArg<'tcx>],
         seg: &hir::PathSegment<'_>,
-        generic_args: &'a hir::GenericArgs<'_>,
+        generic_args: &'a hir::GenericArgs<'tcx>,
         infer_args: bool,
         self_ty: Option<Ty<'tcx>>,
         constness: ty::BoundConstness,
@@ -406,14 +406,14 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         struct SubstsForAstPathCtxt<'a, 'tcx> {
             astconv: &'a (dyn AstConv<'tcx> + 'a),
             def_id: DefId,
-            generic_args: &'a GenericArgs<'a>,
+            generic_args: &'a GenericArgs<'tcx>,
             span: Span,
             inferred_params: Vec<Span>,
             infer_args: bool,
         }
 
         impl<'a, 'tcx> CreateSubstsForGenericArgsCtxt<'a, 'tcx> for SubstsForAstPathCtxt<'a, 'tcx> {
-            fn args_for_def_id(&mut self, did: DefId) -> (Option<&'a GenericArgs<'a>>, bool) {
+            fn args_for_def_id(&mut self, did: DefId) -> (Option<&'a GenericArgs<'tcx>>, bool) {
                 if did == self.def_id {
                     (Some(self.generic_args), self.infer_args)
                 } else {
@@ -425,11 +425,11 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
             fn provided_kind(
                 &mut self,
                 param: &ty::GenericParamDef,
-                arg: &GenericArg<'_>,
+                arg: &GenericArg<'tcx>,
             ) -> ty::GenericArg<'tcx> {
                 let tcx = self.astconv.tcx();
 
-                let mut handle_ty_args = |has_default, ty: &hir::Ty<'_>| {
+                let mut handle_ty_args = |has_default, ty: &hir::Ty<'tcx>| {
                     if has_default {
                         tcx.check_optional_stability(
                             param.def_id,
@@ -592,7 +592,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
 
     fn create_assoc_bindings_for_generic_args<'a>(
         &self,
-        generic_args: &'a hir::GenericArgs<'_>,
+        generic_args: &'a hir::GenericArgs<'tcx>,
     ) -> Vec<ConvertedBinding<'a, 'tcx>> {
         // Convert associated-type bindings or constraints into a separate vector.
         // Example: Given this:
@@ -640,7 +640,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         &self,
         span: Span,
         item_def_id: DefId,
-        item_segment: &hir::PathSegment<'_>,
+        item_segment: &hir::PathSegment<'tcx>,
         parent_args: GenericArgsRef<'tcx>,
     ) -> GenericArgsRef<'tcx> {
         debug!(
@@ -673,7 +673,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
     /// are disallowed. Otherwise, they are pushed onto the vector given.
     pub fn instantiate_mono_trait_ref(
         &self,
-        trait_ref: &hir::TraitRef<'_>,
+        trait_ref: &hir::TraitRef<'tcx>,
         self_ty: Ty<'tcx>,
     ) -> ty::TraitRef<'tcx> {
         self.prohibit_generics(trait_ref.path.segments.split_last().unwrap().1.iter(), |_| {});
@@ -710,7 +710,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
     #[instrument(level = "debug", skip(self, span, constness, bounds, speculative))]
     pub(crate) fn instantiate_poly_trait_ref(
         &self,
-        trait_ref: &hir::TraitRef<'_>,
+        trait_ref: &hir::TraitRef<'tcx>,
         span: Span,
         constness: ty::BoundConstness,
         polarity: ty::ImplPolarity,
@@ -788,7 +788,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         span: Span,
         trait_def_id: DefId,
         self_ty: Ty<'tcx>,
-        trait_segment: &hir::PathSegment<'_>,
+        trait_segment: &hir::PathSegment<'tcx>,
         is_impl: bool,
         // FIXME(effects) move all host param things in astconv to hir lowering
         constness: ty::BoundConstness,
@@ -813,7 +813,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         span: Span,
         trait_def_id: DefId,
         self_ty: Ty<'tcx>,
-        trait_segment: &'a hir::PathSegment<'a>,
+        trait_segment: &'a hir::PathSegment<'tcx>,
         is_impl: bool,
         constness: ty::BoundConstness,
     ) -> (GenericArgsRef<'tcx>, GenericArgCountResult) {
@@ -847,7 +847,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         &self,
         span: Span,
         did: DefId,
-        item_segment: &hir::PathSegment<'_>,
+        item_segment: &hir::PathSegment<'tcx>,
     ) -> Ty<'tcx> {
         let tcx = self.tcx();
         let args = self.ast_path_args_for_ty(span, did, item_segment);
@@ -1153,7 +1153,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         span: Span,
         qself_ty: Ty<'tcx>,
         qself: &hir::Ty<'_>,
-        assoc_segment: &hir::PathSegment<'_>,
+        assoc_segment: &hir::PathSegment<'tcx>,
         permit_variants: bool,
     ) -> Result<(Ty<'tcx>, DefKind, DefId), ErrorGuaranteed> {
         let tcx = self.tcx();
@@ -1428,7 +1428,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
     fn lookup_inherent_assoc_ty(
         &self,
         name: Ident,
-        segment: &hir::PathSegment<'_>,
+        segment: &hir::PathSegment<'tcx>,
         adt_did: DefId,
         self_ty: Ty<'tcx>,
         block: hir::HirId,
@@ -1702,8 +1702,8 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         span: Span,
         opt_self_ty: Option<Ty<'tcx>>,
         item_def_id: DefId,
-        trait_segment: &hir::PathSegment<'_>,
-        item_segment: &hir::PathSegment<'_>,
+        trait_segment: &hir::PathSegment<'tcx>,
+        item_segment: &hir::PathSegment<'tcx>,
         constness: ty::BoundConstness,
     ) -> Ty<'tcx> {
         let tcx = self.tcx();
@@ -2021,7 +2021,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
     pub fn res_to_ty(
         &self,
         opt_self_ty: Option<Ty<'tcx>>,
-        path: &hir::Path<'_>,
+        path: &hir::Path<'tcx>,
         hir_id: hir::HirId,
         permit_variants: bool,
     ) -> Ty<'tcx> {
@@ -2311,13 +2311,13 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
 
     /// Parses the programmer's textual representation of a type into our
     /// internal notion of a type.
-    pub fn ast_ty_to_ty(&self, ast_ty: &hir::Ty<'_>) -> Ty<'tcx> {
+    pub fn ast_ty_to_ty(&self, ast_ty: &hir::Ty<'tcx>) -> Ty<'tcx> {
         self.ast_ty_to_ty_inner(ast_ty, false, false)
     }
 
     /// Parses the programmer's textual representation of a type into our
     /// internal notion of a type. This is meant to be used within a path.
-    pub fn ast_ty_to_ty_in_path(&self, ast_ty: &hir::Ty<'_>) -> Ty<'tcx> {
+    pub fn ast_ty_to_ty_in_path(&self, ast_ty: &hir::Ty<'tcx>) -> Ty<'tcx> {
         self.ast_ty_to_ty_inner(ast_ty, false, true)
     }
 
@@ -2432,7 +2432,12 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
     /// Turns a `hir::Ty` into a `Ty`. For diagnostics' purposes we keep track of whether trait
     /// objects are borrowed like `&dyn Trait` to avoid emitting redundant errors.
     #[instrument(level = "debug", skip(self), ret)]
-    fn ast_ty_to_ty_inner(&self, ast_ty: &hir::Ty<'_>, borrowed: bool, in_path: bool) -> Ty<'tcx> {
+    fn ast_ty_to_ty_inner(
+        &self,
+        ast_ty: &hir::Ty<'tcx>,
+        borrowed: bool,
+        in_path: bool,
+    ) -> Ty<'tcx> {
         let tcx = self.tcx();
 
         let result_ty = match &ast_ty.kind {
@@ -2609,7 +2614,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         }
     }
 
-    pub fn ty_of_arg(&self, ty: &hir::Ty<'_>, expected_ty: Option<Ty<'tcx>>) -> Ty<'tcx> {
+    pub fn ty_of_arg(&self, ty: &hir::Ty<'tcx>, expected_ty: Option<Ty<'tcx>>) -> Ty<'tcx> {
         match ty.kind {
             hir::TyKind::Infer if expected_ty.is_some() => {
                 self.record_ty(ty.hir_id, expected_ty.unwrap(), ty.span);
@@ -2625,7 +2630,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         hir_id: hir::HirId,
         unsafety: hir::Unsafety,
         abi: abi::Abi,
-        decl: &hir::FnDecl<'_>,
+        decl: &hir::FnDecl<'tcx>,
         generics: Option<&hir::Generics<'_>>,
         hir_ty: Option<&hir::Ty<'_>>,
     ) -> ty::PolyFnSig<'tcx> {

compiler/rustc_hir_analysis/src/astconv/object_safety.rs

@@ -22,7 +22,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         &self,
         span: Span,
         hir_id: hir::HirId,
-        hir_trait_bounds: &[hir::PolyTraitRef<'_>],
+        hir_trait_bounds: &[hir::PolyTraitRef<'tcx>],
         lifetime: &hir::Lifetime,
         borrowed: bool,
         representation: DynKind,

compiler/rustc_hir_analysis/src/check/wfcheck.rs

@@ -1790,7 +1790,7 @@ fn receiver_is_implemented<'tcx>(
 fn check_variances_for_type_defn<'tcx>(
     tcx: TyCtxt<'tcx>,
     item: &hir::Item<'tcx>,
-    hir_generics: &hir::Generics<'_>,
+    hir_generics: &hir::Generics<'tcx>,
 ) {
     let identity_args = ty::GenericArgs::identity_for_item(tcx, item.owner_id);
 

compiler/rustc_hir_analysis/src/collect.rs

@@ -348,7 +348,7 @@ impl<'tcx> ItemCtxt<'tcx> {
         ItemCtxt { tcx, item_def_id, tainted_by_errors: Cell::new(None) }
     }
 
-    pub fn to_ty(&self, ast_ty: &hir::Ty<'_>) -> Ty<'tcx> {
+    pub fn to_ty(&self, ast_ty: &hir::Ty<'tcx>) -> Ty<'tcx> {
         self.astconv().ast_ty_to_ty(ast_ty)
     }
 
@@ -412,7 +412,7 @@ impl<'tcx> AstConv<'tcx> for ItemCtxt<'tcx> {
         &self,
         span: Span,
         item_def_id: DefId,
-        item_segment: &hir::PathSegment<'_>,
+        item_segment: &hir::PathSegment<'tcx>,
         poly_trait_ref: ty::PolyTraitRef<'tcx>,
     ) -> Ty<'tcx> {
         if let Some(trait_ref) = poly_trait_ref.no_bound_vars() {
@@ -1148,7 +1148,7 @@ fn fn_sig(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::EarlyBinder<ty::PolyFnSig<
 
 fn infer_return_ty_for_fn_sig<'tcx>(
     tcx: TyCtxt<'tcx>,
-    sig: &hir::FnSig<'_>,
+    sig: &hir::FnSig<'tcx>,
     generics: &hir::Generics<'_>,
     def_id: LocalDefId,
     icx: &ItemCtxt<'tcx>,
@@ -1352,14 +1352,14 @@ fn impl_trait_ref(
                 let last_arg = args.args.len() - 1;
                 assert!(matches!(args.args[last_arg], hir::GenericArg::Const(anon_const) if anon_const.is_desugared_from_effects));
                 args.args = &args.args[..args.args.len() - 1];
-                path_segments[last_segment].args = Some(&args);
+                path_segments[last_segment].args = Some(tcx.hir_arena.alloc(args));
                 let path = hir::Path {
                     span: ast_trait_ref.path.span,
                     res: ast_trait_ref.path.res,
-                    segments: &path_segments,
+                    segments: tcx.hir_arena.alloc_slice(&path_segments),
                 };
-                let trait_ref = hir::TraitRef { path: &path, hir_ref_id: ast_trait_ref.hir_ref_id };
-                icx.astconv().instantiate_mono_trait_ref(&trait_ref, selfty)
+                let trait_ref = tcx.hir_arena.alloc(hir::TraitRef { path: tcx.hir_arena.alloc(path), hir_ref_id: ast_trait_ref.hir_ref_id });
+                icx.astconv().instantiate_mono_trait_ref(trait_ref, selfty)
             } else {
                 icx.astconv().instantiate_mono_trait_ref(ast_trait_ref, selfty)
             }

compiler/rustc_hir_analysis/src/lib.rs

@@ -221,7 +221,7 @@ pub fn check_crate(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
 
 /// A quasi-deprecated helper used in rustdoc and clippy to get
 /// the type from a HIR node.
-pub fn hir_ty_to_ty<'tcx>(tcx: TyCtxt<'tcx>, hir_ty: &hir::Ty<'_>) -> Ty<'tcx> {
+pub fn hir_ty_to_ty<'tcx>(tcx: TyCtxt<'tcx>, hir_ty: &hir::Ty<'tcx>) -> Ty<'tcx> {
     // In case there are any projections, etc., find the "environment"
     // def-ID that will be used to determine the traits/predicates in
     // scope. This is derived from the enclosing item-like thing.
@@ -232,7 +232,7 @@ pub fn hir_ty_to_ty<'tcx>(tcx: TyCtxt<'tcx>, hir_ty: &hir::Ty<'_>) -> Ty<'tcx> {
 
 pub fn hir_trait_to_predicates<'tcx>(
     tcx: TyCtxt<'tcx>,
-    hir_trait: &hir::TraitRef<'_>,
+    hir_trait: &hir::TraitRef<'tcx>,
     self_ty: Ty<'tcx>,
 ) -> Bounds<'tcx> {
     // In case there are any projections, etc., find the "environment"

compiler/rustc_hir_typeck/src/closure.rs

@@ -373,7 +373,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     fn sig_of_closure(
         &self,
         expr_def_id: LocalDefId,
-        decl: &hir::FnDecl<'_>,
+        decl: &hir::FnDecl<'tcx>,
         closure_kind: hir::ClosureKind,
         expected_sig: Option<ExpectedSig<'tcx>>,
     ) -> ClosureSignatures<'tcx> {
@@ -390,7 +390,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     fn sig_of_closure_no_expectation(
         &self,
         expr_def_id: LocalDefId,
-        decl: &hir::FnDecl<'_>,
+        decl: &hir::FnDecl<'tcx>,
         closure_kind: hir::ClosureKind,
     ) -> ClosureSignatures<'tcx> {
         let bound_sig = self.supplied_sig_of_closure(expr_def_id, decl, closure_kind);
@@ -449,7 +449,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     fn sig_of_closure_with_expectation(
         &self,
         expr_def_id: LocalDefId,
-        decl: &hir::FnDecl<'_>,
+        decl: &hir::FnDecl<'tcx>,
         closure_kind: hir::ClosureKind,
         expected_sig: ExpectedSig<'tcx>,
     ) -> ClosureSignatures<'tcx> {
@@ -506,7 +506,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     fn sig_of_closure_with_mismatched_number_of_arguments(
         &self,
         expr_def_id: LocalDefId,
-        decl: &hir::FnDecl<'_>,
+        decl: &hir::FnDecl<'tcx>,
         expected_sig: ExpectedSig<'tcx>,
     ) -> ClosureSignatures<'tcx> {
         let expr_map_node = self.tcx.hir_node_by_def_id(expr_def_id);
@@ -547,7 +547,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     fn merge_supplied_sig_with_expectation(
         &self,
         expr_def_id: LocalDefId,
-        decl: &hir::FnDecl<'_>,
+        decl: &hir::FnDecl<'tcx>,
         closure_kind: hir::ClosureKind,
         mut expected_sigs: ClosureSignatures<'tcx>,
     ) -> InferResult<'tcx, ClosureSignatures<'tcx>> {
@@ -641,7 +641,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     fn supplied_sig_of_closure(
         &self,
         expr_def_id: LocalDefId,
-        decl: &hir::FnDecl<'_>,
+        decl: &hir::FnDecl<'tcx>,
         closure_kind: hir::ClosureKind,
     ) -> ty::PolyFnSig<'tcx> {
         let astconv: &dyn AstConv<'_> = self;
@@ -843,7 +843,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     /// all parameters are of type `ty::Error`.
     fn error_sig_of_closure(
         &self,
-        decl: &hir::FnDecl<'_>,
+        decl: &hir::FnDecl<'tcx>,
         guar: ErrorGuaranteed,
     ) -> ty::PolyFnSig<'tcx> {
         let astconv: &dyn AstConv<'_> = self;

compiler/rustc_hir_typeck/src/expr.rs

@@ -1315,7 +1315,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     fn check_method_call(
         &self,
         expr: &'tcx hir::Expr<'tcx>,
-        segment: &hir::PathSegment<'_>,
+        segment: &'tcx hir::PathSegment<'tcx>,
         rcvr: &'tcx hir::Expr<'tcx>,
         args: &'tcx [hir::Expr<'tcx>],
         expected: Expectation<'tcx>,
@@ -1627,7 +1627,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         &self,
         expr: &hir::Expr<'_>,
         expected: Expectation<'tcx>,
-        qpath: &QPath<'_>,
+        qpath: &QPath<'tcx>,
         fields: &'tcx [hir::ExprField<'tcx>],
         base_expr: &'tcx Option<&'tcx hir::Expr<'tcx>>,
     ) -> Ty<'tcx> {

compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs

@@ -377,13 +377,13 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         RawTy { raw: ty, normalized: self.normalize(span, ty) }
     }
 
-    pub fn to_ty(&self, ast_t: &hir::Ty<'_>) -> RawTy<'tcx> {
+    pub fn to_ty(&self, ast_t: &hir::Ty<'tcx>) -> RawTy<'tcx> {
         let t = self.astconv().ast_ty_to_ty(ast_t);
         self.register_wf_obligation(t.into(), ast_t.span, traits::WellFormed(None));
         self.handle_raw_ty(ast_t.span, t)
     }
 
-    pub fn to_ty_saving_user_provided_ty(&self, ast_ty: &hir::Ty<'_>) -> Ty<'tcx> {
+    pub fn to_ty_saving_user_provided_ty(&self, ast_ty: &hir::Ty<'tcx>) -> Ty<'tcx> {
         let ty = self.to_ty(ast_ty);
         debug!("to_ty_saving_user_provided_ty: ty={:?}", ty);
 
@@ -1073,7 +1073,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     #[instrument(skip(self, span), level = "debug")]
     pub fn instantiate_value_path(
         &self,
-        segments: &[hir::PathSegment<'_>],
+        segments: &'tcx [hir::PathSegment<'tcx>],
         self_ty: Option<RawTy<'tcx>>,
         res: Res,
         span: Span,
@@ -1260,13 +1260,13 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             span: Span,
             path_segs: &'a [PathSeg],
             infer_args_for_err: &'a FxHashSet<usize>,
-            segments: &'a [hir::PathSegment<'a>],
+            segments: &'tcx [hir::PathSegment<'tcx>],
         }
         impl<'tcx, 'a> CreateSubstsForGenericArgsCtxt<'a, 'tcx> for CreateCtorSubstsContext<'a, 'tcx> {
             fn args_for_def_id(
                 &mut self,
                 def_id: DefId,
-            ) -> (Option<&'a hir::GenericArgs<'a>>, bool) {
+            ) -> (Option<&'a hir::GenericArgs<'tcx>>, bool) {
                 if let Some(&PathSeg(_, index)) =
                     self.path_segs.iter().find(|&PathSeg(did, _)| *did == def_id)
                 {
@@ -1287,7 +1287,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             fn provided_kind(
                 &mut self,
                 param: &ty::GenericParamDef,
-                arg: &GenericArg<'_>,
+                arg: &GenericArg<'tcx>,
             ) -> ty::GenericArg<'tcx> {
                 match (&param.kind, arg) {
                     (GenericParamDefKind::Lifetime, GenericArg::Lifetime(lt)) => {

compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs

@@ -1327,7 +1327,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
     pub fn check_struct_path(
         &self,
-        qpath: &QPath<'_>,
+        qpath: &QPath<'tcx>,
         hir_id: hir::HirId,
     ) -> Result<(&'tcx ty::VariantDef, Ty<'tcx>), ErrorGuaranteed> {
         let path_span = qpath.span();
@@ -1783,7 +1783,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     // The newly resolved definition is written into `type_dependent_defs`.
     fn finish_resolving_struct_path(
         &self,
-        qpath: &QPath<'_>,
+        qpath: &QPath<'tcx>,
         path_span: Span,
         hir_id: hir::HirId,
     ) -> (Res, RawTy<'tcx>) {

compiler/rustc_hir_typeck/src/fn_ctxt/mod.rs

@@ -283,7 +283,7 @@ impl<'a, 'tcx> AstConv<'tcx> for FnCtxt<'a, 'tcx> {
         &self,
         span: Span,
         item_def_id: DefId,
-        item_segment: &hir::PathSegment<'_>,
+        item_segment: &hir::PathSegment<'tcx>,
         poly_trait_ref: ty::PolyTraitRef<'tcx>,
     ) -> Ty<'tcx> {
         let trait_ref = self.instantiate_binder_with_fresh_vars(

compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs

@@ -784,7 +784,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     pub(in super::super) fn suggest_missing_return_type(
         &self,
         err: &mut Diagnostic,
-        fn_decl: &hir::FnDecl<'_>,
+        fn_decl: &hir::FnDecl<'tcx>,
         expected: Ty<'tcx>,
         found: Ty<'tcx>,
         can_suggest: bool,
@@ -995,7 +995,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         &self,
         err: &mut Diagnostic,
         expr: &'tcx hir::Expr<'tcx>,
-        fn_decl: &hir::FnDecl<'_>,
+        fn_decl: &hir::FnDecl<'tcx>,
         expected: Ty<'tcx>,
         found: Ty<'tcx>,
         id: hir::HirId,
@@ -1468,7 +1468,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     pub(crate) fn suggest_associated_const(
         &self,
         err: &mut Diagnostic,
-        expr: &hir::Expr<'_>,
+        expr: &hir::Expr<'tcx>,
         expected_ty: Ty<'tcx>,
     ) -> bool {
         let Some((DefKind::AssocFn, old_def_id)) =

compiler/rustc_hir_typeck/src/method/confirm.rs

@@ -50,7 +50,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         call_expr: &'tcx hir::Expr<'tcx>,
         unadjusted_self_ty: Ty<'tcx>,
         pick: &probe::Pick<'tcx>,
-        segment: &hir::PathSegment<'_>,
+        segment: &'tcx hir::PathSegment<'tcx>,
     ) -> ConfirmResult<'tcx> {
         debug!(
             "confirm(unadjusted_self_ty={:?}, pick={:?}, generic_args={:?})",
@@ -68,7 +68,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         call_expr: &'tcx hir::Expr<'tcx>,
         unadjusted_self_ty: Ty<'tcx>,
         pick: &probe::Pick<'tcx>,
-        segment: &hir::PathSegment<'_>,
+        segment: &hir::PathSegment<'tcx>,
     ) -> ConfirmResult<'tcx> {
         let mut confirm_cx = ConfirmContext::new(self, span, self_expr, call_expr);
         confirm_cx.skip_record_for_diagnostics = true;
@@ -90,7 +90,7 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
         &mut self,
         unadjusted_self_ty: Ty<'tcx>,
         pick: &probe::Pick<'tcx>,
-        segment: &hir::PathSegment<'_>,
+        segment: &hir::PathSegment<'tcx>,
     ) -> ConfirmResult<'tcx> {
         // Adjust the self expression the user provided and obtain the adjusted type.
         let self_ty = self.adjust_self_ty(unadjusted_self_ty, pick);
@@ -346,7 +346,7 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
     fn instantiate_method_args(
         &mut self,
         pick: &probe::Pick<'tcx>,
-        seg: &hir::PathSegment<'_>,
+        seg: &hir::PathSegment<'tcx>,
         parent_args: GenericArgsRef<'tcx>,
     ) -> GenericArgsRef<'tcx> {
         // Determine the values for the generic parameters of the method.
@@ -370,13 +370,13 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
         struct MethodSubstsCtxt<'a, 'tcx> {
             cfcx: &'a ConfirmContext<'a, 'tcx>,
             pick: &'a probe::Pick<'tcx>,
-            seg: &'a hir::PathSegment<'a>,
+            seg: &'a hir::PathSegment<'tcx>,
         }
         impl<'a, 'tcx> CreateSubstsForGenericArgsCtxt<'a, 'tcx> for MethodSubstsCtxt<'a, 'tcx> {
             fn args_for_def_id(
                 &mut self,
                 def_id: DefId,
-            ) -> (Option<&'a hir::GenericArgs<'a>>, bool) {
+            ) -> (Option<&'a hir::GenericArgs<'tcx>>, bool) {
                 if def_id == self.pick.item.def_id {
                     if let Some(data) = self.seg.args {
                         return (Some(data), false);
@@ -388,7 +388,7 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
             fn provided_kind(
                 &mut self,
                 param: &ty::GenericParamDef,
-                arg: &GenericArg<'_>,
+                arg: &GenericArg<'tcx>,
             ) -> ty::GenericArg<'tcx> {
                 match (&param.kind, arg) {
                     (GenericParamDefKind::Lifetime, GenericArg::Lifetime(lt)) => {

compiler/rustc_hir_typeck/src/method/mod.rs

@@ -177,7 +177,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     pub fn lookup_method(
         &self,
         self_ty: Ty<'tcx>,
-        segment: &hir::PathSegment<'_>,
+        segment: &'tcx hir::PathSegment<'tcx>,
         span: Span,
         call_expr: &'tcx hir::Expr<'tcx>,
         self_expr: &'tcx hir::Expr<'tcx>,
@@ -255,7 +255,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     pub fn lookup_method_for_diagnostic(
         &self,
         self_ty: Ty<'tcx>,
-        segment: &hir::PathSegment<'_>,
+        segment: &hir::PathSegment<'tcx>,
         span: Span,
         call_expr: &'tcx hir::Expr<'tcx>,
         self_expr: &'tcx hir::Expr<'tcx>,

compiler/rustc_hir_typeck/src/pat.rs

@@ -858,7 +858,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     fn check_pat_struct(
         &self,
         pat: &'tcx Pat<'tcx>,
-        qpath: &hir::QPath<'_>,
+        qpath: &hir::QPath<'tcx>,
         fields: &'tcx [hir::PatField<'tcx>],
         has_rest_pat: bool,
         expected: Ty<'tcx>,

src/tools/clippy/clippy_lints/src/default_union_representation.rs

@@ -75,7 +75,7 @@ impl<'tcx> LateLintPass<'tcx> for DefaultUnionRepresentation {
 /// (ZST fields having an arbitrary offset is completely inconsequential, and
 /// if there is only one field left after ignoring ZST fields then the offset
 /// of that field does not matter either.)
-fn is_union_with_two_non_zst_fields(cx: &LateContext<'_>, item: &Item<'_>) -> bool {
+fn is_union_with_two_non_zst_fields<'tcx>(cx: &LateContext<'tcx>, item: &Item<'tcx>) -> bool {
     if let ItemKind::Union(..) = &item.kind
         && let ty::Adt(adt_def, args) = cx.tcx.type_of(item.owner_id).instantiate_identity().kind()
     {

src/tools/clippy/clippy_lints/src/implicit_hasher.rs

@@ -210,7 +210,7 @@ enum ImplicitHasherType<'tcx> {
 
 impl<'tcx> ImplicitHasherType<'tcx> {
     /// Checks that `ty` is a target type without a `BuildHasher`.
-    fn new(cx: &LateContext<'tcx>, hir_ty: &hir::Ty<'_>) -> Option<Self> {
+    fn new(cx: &LateContext<'tcx>, hir_ty: &hir::Ty<'tcx>) -> Option<Self> {
         if let TyKind::Path(QPath::Resolved(None, path)) = hir_ty.kind {
             let params: Vec<_> = path
                 .segments

src/tools/clippy/clippy_lints/src/types/mod.rs

@@ -314,9 +314,9 @@ impl_lint_pass!(Types => [BOX_COLLECTION, VEC_BOX, OPTION_OPTION, LINKEDLIST, BO
 impl<'tcx> LateLintPass<'tcx> for Types {
     fn check_fn(
         &mut self,
-        cx: &LateContext<'_>,
+        cx: &LateContext<'tcx>,
         fn_kind: FnKind<'_>,
-        decl: &FnDecl<'_>,
+        decl: &FnDecl<'tcx>,
         _: &Body<'_>,
         _: Span,
         def_id: LocalDefId,
@@ -346,7 +346,7 @@ impl<'tcx> LateLintPass<'tcx> for Types {
         );
     }
 
-    fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) {
+    fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'tcx>) {
         let is_exported = cx.effective_visibilities.is_exported(item.owner_id.def_id);
 
         match item.kind {
@@ -363,7 +363,7 @@ impl<'tcx> LateLintPass<'tcx> for Types {
         }
     }
 
-    fn check_impl_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx ImplItem<'_>) {
+    fn check_impl_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx ImplItem<'tcx>) {
         match item.kind {
             ImplItemKind::Const(ty, _) => {
                 let is_in_trait_impl = if let Some(hir::Node::Item(item)) = cx
@@ -391,7 +391,7 @@ impl<'tcx> LateLintPass<'tcx> for Types {
         }
     }
 
-    fn check_field_def(&mut self, cx: &LateContext<'_>, field: &hir::FieldDef<'_>) {
+    fn check_field_def(&mut self, cx: &LateContext<'tcx>, field: &hir::FieldDef<'tcx>) {
         let is_exported = cx.effective_visibilities.is_exported(field.def_id);
 
         self.check_ty(
@@ -404,7 +404,7 @@ impl<'tcx> LateLintPass<'tcx> for Types {
         );
     }
 
-    fn check_trait_item(&mut self, cx: &LateContext<'tcx>, item: &TraitItem<'_>) {
+    fn check_trait_item(&mut self, cx: &LateContext<'tcx>, item: &TraitItem<'tcx>) {
         let is_exported = cx.effective_visibilities.is_exported(item.owner_id.def_id);
 
         let context = CheckTyContext {
@@ -421,7 +421,7 @@ impl<'tcx> LateLintPass<'tcx> for Types {
         }
     }
 
-    fn check_local(&mut self, cx: &LateContext<'_>, local: &Local<'_>) {
+    fn check_local(&mut self, cx: &LateContext<'tcx>, local: &Local<'tcx>) {
         if let Some(ty) = local.ty {
             self.check_ty(
                 cx,
@@ -444,7 +444,7 @@ impl Types {
         }
     }
 
-    fn check_fn_decl(&mut self, cx: &LateContext<'_>, decl: &FnDecl<'_>, context: CheckTyContext) {
+    fn check_fn_decl<'tcx>(&mut self, cx: &LateContext<'tcx>, decl: &FnDecl<'tcx>, context: CheckTyContext) {
         // Ignore functions in trait implementations as they are usually forced by the trait definition.
         //
         // FIXME: ideally we would like to warn *if the complicated type can be simplified*, but it's hard
@@ -466,7 +466,7 @@ impl Types {
     /// lint found.
     ///
     /// The parameter `is_local` distinguishes the context of the type.
-    fn check_ty(&mut self, cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, mut context: CheckTyContext) {
+    fn check_ty<'tcx>(&mut self, cx: &LateContext<'tcx>, hir_ty: &hir::Ty<'tcx>, mut context: CheckTyContext) {
         if hir_ty.span.from_expansion() {
             return;
         }

src/tools/clippy/clippy_lints/src/types/redundant_allocation.rs

@@ -11,7 +11,7 @@ use rustc_span::symbol::sym;
 
 use super::{utils, REDUNDANT_ALLOCATION};
 
-pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, qpath: &QPath<'_>, def_id: DefId) -> bool {
+pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, hir_ty: &hir::Ty<'tcx>, qpath: &QPath<'tcx>, def_id: DefId) -> bool {
     let mut applicability = Applicability::MaybeIncorrect;
     let outer_sym = if Some(def_id) == cx.tcx.lang_items().owned_box() {
         "Box"

src/tools/clippy/clippy_lints/src/types/vec_box.rs

@@ -13,10 +13,10 @@ use rustc_span::symbol::sym;
 
 use super::VEC_BOX;
 
-pub(super) fn check(
-    cx: &LateContext<'_>,
+pub(super) fn check<'tcx>(
+    cx: &LateContext<'tcx>,
     hir_ty: &hir::Ty<'_>,
-    qpath: &QPath<'_>,
+    qpath: &QPath<'tcx>,
     def_id: DefId,
     box_size_threshold: u64,
 ) -> bool {

src/tools/clippy/clippy_lints/src/unconditional_recursion.rs

@@ -77,7 +77,7 @@ fn get_ty_def_id(ty: Ty<'_>) -> Option<DefId> {
     }
 }
 
-fn get_hir_ty_def_id(tcx: TyCtxt<'_>, hir_ty: rustc_hir::Ty<'_>) -> Option<DefId> {
+fn get_hir_ty_def_id<'tcx>(tcx: TyCtxt<'tcx>, hir_ty: rustc_hir::Ty<'tcx>) -> Option<DefId> {
     let TyKind::Path(qpath) = hir_ty.kind else { return None };
     match qpath {
         QPath::Resolved(_, path) => path.res.opt_def_id(),
@@ -229,7 +229,7 @@ fn check_to_string(cx: &LateContext<'_>, method_span: Span, method_def_id: Local
     }
 }
 
-fn is_default_method_on_current_ty(tcx: TyCtxt<'_>, qpath: QPath<'_>, implemented_ty_id: DefId) -> bool {
+fn is_default_method_on_current_ty<'tcx>(tcx: TyCtxt<'tcx>, qpath: QPath<'tcx>, implemented_ty_id: DefId) -> bool {
     match qpath {
         QPath::Resolved(_, path) => match path.segments {
             [first, .., last] => last.ident.name == kw::Default && first.res.opt_def_id() == Some(implemented_ty_id),

src/tools/clippy/clippy_lints/src/uninhabited_references.rs

@@ -57,11 +57,11 @@ impl LateLintPass<'_> for UninhabitedReferences {
         }
     }
 
-    fn check_fn(
+    fn check_fn<'tcx>(
         &mut self,
-        cx: &LateContext<'_>,
+        cx: &LateContext<'tcx>,
         kind: FnKind<'_>,
-        fndecl: &'_ FnDecl<'_>,
+        fndecl: &'_ FnDecl<'tcx>,
         _: &'_ Body<'_>,
         span: Span,
         _: LocalDefId,

src/tools/clippy/clippy_lints/src/use_self.rs

@@ -207,7 +207,7 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf {
         }
     }
 
-    fn check_ty(&mut self, cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>) {
+    fn check_ty(&mut self, cx: &LateContext<'tcx>, hir_ty: &hir::Ty<'tcx>) {
         if !hir_ty.span.from_expansion()
             && self.msrv.meets(msrvs::TYPE_ALIAS_ENUM_VARIANTS)
             && let Some(&StackItem::Check {

src/tools/clippy/clippy_lints/src/zero_sized_map_values.rs

@@ -44,7 +44,7 @@ declare_clippy_lint! {
 declare_lint_pass!(ZeroSizedMapValues => [ZERO_SIZED_MAP_VALUES]);
 
 impl LateLintPass<'_> for ZeroSizedMapValues {
-    fn check_ty(&mut self, cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>) {
+    fn check_ty<'tcx>(&mut self, cx: &LateContext<'tcx>, hir_ty: &hir::Ty<'tcx>) {
         if !hir_ty.span.from_expansion()
             && !in_trait_impl(cx, hir_ty.hir_id)
             && let ty = ty_from_hir_ty(cx, hir_ty)
@@ -82,7 +82,7 @@ fn in_trait_impl(cx: &LateContext<'_>, hir_id: HirId) -> bool {
     false
 }
 
-fn ty_from_hir_ty<'tcx>(cx: &LateContext<'tcx>, hir_ty: &hir::Ty<'_>) -> Ty<'tcx> {
+fn ty_from_hir_ty<'tcx>(cx: &LateContext<'tcx>, hir_ty: &hir::Ty<'tcx>) -> Ty<'tcx> {
     cx.maybe_typeck_results()
         .and_then(|results| {
             if results.hir_owner == hir_ty.hir_id.owner {