remove unnecessary lifetimes that can be elided

crates/hir-def/src/generics.rs

@@ -142,8 +142,8 @@ pub enum WherePredicateTypeTarget {
 
 impl GenericParams {
     /// Iterator of type_or_consts field
-    pub fn iter<'a>(
+    pub fn iter(
-        &'a self,
+        &self,
     ) -> impl DoubleEndedIterator<Item = (Idx<TypeOrConstParamData>, &TypeOrConstParamData)> {
         self.type_or_consts.iter()
     }

crates/hir-def/src/import_map.rs

@@ -393,8 +393,8 @@ impl Query {
 /// Searches dependencies of `krate` for an importable path matching `query`.
 ///
 /// This returns a list of items that could be imported from dependencies of `krate`.
-pub fn search_dependencies<'a>(
+pub fn search_dependencies(
-    db: &'a dyn DefDatabase,
+    db: &dyn DefDatabase,
     krate: CrateId,
     query: Query,
 ) -> FxHashSet<ItemInNs> {

crates/hir-def/src/item_scope.rs

@@ -96,7 +96,7 @@ pub(crate) enum BuiltinShadowMode {
 /// Legacy macros can only be accessed through special methods like `get_legacy_macros`.
 /// Other methods will only resolve values, types and module scoped macros only.
 impl ItemScope {
-    pub fn entries<'a>(&'a self) -> impl Iterator<Item = (&'a Name, PerNs)> + 'a {
+    pub fn entries(&self) -> impl Iterator<Item = (&Name, PerNs)> + '_ {
         // FIXME: shadowing
         self.types
             .keys()
@@ -169,7 +169,7 @@ impl ItemScope {
         iter.find_map(|(name, &(other_def, vis))| (other_def == def).then_some((name, vis)))
     }
 
-    pub(crate) fn traits<'a>(&'a self) -> impl Iterator<Item = TraitId> + 'a {
+    pub(crate) fn traits(&self) -> impl Iterator<Item = TraitId> + '_ {
         self.types
             .values()
             .filter_map(|&(def, _)| match def {
@@ -326,7 +326,7 @@ impl ItemScope {
         changed
     }
 
-    pub(crate) fn resolutions<'a>(&'a self) -> impl Iterator<Item = (Option<Name>, PerNs)> + 'a {
+    pub(crate) fn resolutions(&self) -> impl Iterator<Item = (Option<Name>, PerNs)> + '_ {
         self.entries().map(|(name, res)| (Some(name.clone()), res)).chain(
             self.unnamed_trait_imports
                 .iter()

crates/hir-ty/src/autoderef.rs

@@ -82,11 +82,11 @@ pub(crate) fn autoderef_step(
 }
 
 // FIXME: replace uses of this with Autoderef above
-pub fn autoderef<'a>(
+pub fn autoderef(
-    db: &'a dyn HirDatabase,
+    db: &dyn HirDatabase,
     env: Arc<TraitEnvironment>,
     ty: Canonical<Ty>,
-) -> impl Iterator<Item = Canonical<Ty>> + 'a {
+) -> impl Iterator<Item = Canonical<Ty>> + '_ {
     let mut table = InferenceTable::new(db, env);
     let ty = table.instantiate_canonical(ty);
     let mut autoderef = Autoderef::new(&mut table, ty);

crates/hir-ty/src/consteval.rs

@@ -511,10 +511,10 @@ pub(crate) fn const_eval_query_variant(
     )
 }
 
-pub(crate) fn eval_to_const<'a>(
+pub(crate) fn eval_to_const(
     expr: Idx<Expr>,
     mode: ParamLoweringMode,
-    ctx: &mut InferenceContext<'a>,
+    ctx: &mut InferenceContext<'_>,
     args: impl FnOnce() -> Generics,
     debruijn: DebruijnIndex,
 ) -> Const {

crates/hir-ty/src/interner.rs

@@ -228,7 +228,7 @@ impl chalk_ir::interner::Interner for Interner {
         Interned::new(InternedWrapper(chalk_ir::TyData { kind, flags }))
     }
 
-    fn ty_data<'a>(self, ty: &'a Self::InternedType) -> &'a chalk_ir::TyData<Self> {
+    fn ty_data(self, ty: &Self::InternedType) -> &chalk_ir::TyData<Self> {
         &ty.0
     }
 
@@ -236,10 +236,7 @@ impl chalk_ir::interner::Interner for Interner {
         Interned::new(InternedWrapper(lifetime))
     }
 
-    fn lifetime_data<'a>(
+    fn lifetime_data(self, lifetime: &Self::InternedLifetime) -> &chalk_ir::LifetimeData<Self> {
-        self,
-        lifetime: &'a Self::InternedLifetime,
-    ) -> &'a chalk_ir::LifetimeData<Self> {
         &lifetime.0
     }
 
@@ -247,7 +244,7 @@ impl chalk_ir::interner::Interner for Interner {
         Interned::new(InternedWrapper(constant))
     }
 
-    fn const_data<'a>(self, constant: &'a Self::InternedConst) -> &'a chalk_ir::ConstData<Self> {
+    fn const_data(self, constant: &Self::InternedConst) -> &chalk_ir::ConstData<Self> {
         &constant.0
     }
 
@@ -267,10 +264,10 @@ impl chalk_ir::interner::Interner for Interner {
         parameter
     }
 
-    fn generic_arg_data<'a>(
+    fn generic_arg_data(
         self,
-        parameter: &'a Self::InternedGenericArg,
+        parameter: &Self::InternedGenericArg,
-    ) -> &'a chalk_ir::GenericArgData<Self> {
+    ) -> &chalk_ir::GenericArgData<Self> {
         parameter
     }
 
@@ -285,11 +282,11 @@ impl chalk_ir::interner::Interner for Interner {
         data.into_iter().collect()
     }
 
-    fn goal_data<'a>(self, goal: &'a Self::InternedGoal) -> &'a GoalData<Self> {
+    fn goal_data(self, goal: &Self::InternedGoal) -> &GoalData<Self> {
         goal
     }
 
-    fn goals_data<'a>(self, goals: &'a Self::InternedGoals) -> &'a [Goal<Interner>] {
+    fn goals_data(self, goals: &Self::InternedGoals) -> &[Goal<Interner>] {
         goals
     }
 
@@ -300,10 +297,7 @@ impl chalk_ir::interner::Interner for Interner {
         Ok(Interned::new(InternedWrapper(data.into_iter().collect::<Result<_, _>>()?)))
     }
 
-    fn substitution_data<'a>(
+    fn substitution_data(self, substitution: &Self::InternedSubstitution) -> &[GenericArg] {
-        self,
-        substitution: &'a Self::InternedSubstitution,
-    ) -> &'a [GenericArg] {
         &substitution.as_ref().0
     }
 
@@ -314,10 +308,10 @@ impl chalk_ir::interner::Interner for Interner {
         data
     }
 
-    fn program_clause_data<'a>(
+    fn program_clause_data(
         self,
-        clause: &'a Self::InternedProgramClause,
+        clause: &Self::InternedProgramClause,
-    ) -> &'a chalk_ir::ProgramClauseData<Self> {
+    ) -> &chalk_ir::ProgramClauseData<Self> {
         clause
     }
 
@@ -328,10 +322,10 @@ impl chalk_ir::interner::Interner for Interner {
         Ok(Interned::new(InternedWrapper(data.into_iter().collect::<Result<_, _>>()?)))
     }
 
-    fn program_clauses_data<'a>(
+    fn program_clauses_data(
         self,
-        clauses: &'a Self::InternedProgramClauses,
+        clauses: &Self::InternedProgramClauses,
-    ) -> &'a [chalk_ir::ProgramClause<Self>] {
+    ) -> &[chalk_ir::ProgramClause<Self>] {
         clauses
     }
 
@@ -342,10 +336,10 @@ impl chalk_ir::interner::Interner for Interner {
         Ok(Interned::new(InternedWrapper(data.into_iter().collect::<Result<_, _>>()?)))
     }
 
-    fn quantified_where_clauses_data<'a>(
+    fn quantified_where_clauses_data(
         self,
-        clauses: &'a Self::InternedQuantifiedWhereClauses,
+        clauses: &Self::InternedQuantifiedWhereClauses,
-    ) -> &'a [chalk_ir::QuantifiedWhereClause<Self>] {
+    ) -> &[chalk_ir::QuantifiedWhereClause<Self>] {
         clauses
     }
 
@@ -356,10 +350,10 @@ impl chalk_ir::interner::Interner for Interner {
         Ok(Interned::new(InternedWrapper(data.into_iter().collect::<Result<_, _>>()?)))
     }
 
-    fn variable_kinds_data<'a>(
+    fn variable_kinds_data(
         self,
-        parameter_kinds: &'a Self::InternedVariableKinds,
+        parameter_kinds: &Self::InternedVariableKinds,
-    ) -> &'a [chalk_ir::VariableKind<Self>] {
+    ) -> &[chalk_ir::VariableKind<Self>] {
         &parameter_kinds.as_ref().0
     }
 
@@ -370,10 +364,10 @@ impl chalk_ir::interner::Interner for Interner {
         Ok(Interned::new(InternedWrapper(data.into_iter().collect::<Result<_, _>>()?)))
     }
 
-    fn canonical_var_kinds_data<'a>(
+    fn canonical_var_kinds_data(
         self,
-        canonical_var_kinds: &'a Self::InternedCanonicalVarKinds,
+        canonical_var_kinds: &Self::InternedCanonicalVarKinds,
-    ) -> &'a [chalk_ir::CanonicalVarKind<Self>] {
+    ) -> &[chalk_ir::CanonicalVarKind<Self>] {
         canonical_var_kinds
     }
 
@@ -384,10 +378,10 @@ impl chalk_ir::interner::Interner for Interner {
         data.into_iter().collect()
     }
 
-    fn constraints_data<'a>(
+    fn constraints_data(
         self,
-        constraints: &'a Self::InternedConstraints,
+        constraints: &Self::InternedConstraints,
-    ) -> &'a [chalk_ir::InEnvironment<chalk_ir::Constraint<Self>>] {
+    ) -> &[chalk_ir::InEnvironment<chalk_ir::Constraint<Self>>] {
         constraints
     }
     fn debug_closure_id(
@@ -410,10 +404,7 @@ impl chalk_ir::interner::Interner for Interner {
         Ok(Interned::new(InternedWrapper(data.into_iter().collect::<Result<_, _>>()?)))
     }
 
-    fn variances_data<'a>(
+    fn variances_data(self, variances: &Self::InternedVariances) -> &[chalk_ir::Variance] {
-        self,
-        variances: &'a Self::InternedVariances,
-    ) -> &'a [chalk_ir::Variance] {
         variances
     }
 }

crates/hir-ty/src/traits.rs

@@ -55,10 +55,7 @@ impl TraitEnvironment {
         }
     }
 
-    pub fn traits_in_scope_from_clauses<'a>(
+    pub fn traits_in_scope_from_clauses(&self, ty: Ty) -> impl Iterator<Item = TraitId> + '_ {
-        &'a self,
-        ty: Ty,
-    ) -> impl Iterator<Item = TraitId> + 'a {
         self.traits_from_clauses
             .iter()
             .filter_map(move |(self_ty, trait_id)| (*self_ty == ty).then_some(*trait_id))

crates/hir-ty/src/utils.rs

@@ -184,9 +184,7 @@ pub(crate) struct Generics {
 }
 
 impl Generics {
-    pub(crate) fn iter_id<'a>(
+    pub(crate) fn iter_id(&self) -> impl Iterator<Item = Either<TypeParamId, ConstParamId>> + '_ {
-        &'a self,
-    ) -> impl Iterator<Item = Either<TypeParamId, ConstParamId>> + 'a {
         self.iter().map(|(id, data)| match data {
             TypeOrConstParamData::TypeParamData(_) => Either::Left(TypeParamId::from_unchecked(id)),
             TypeOrConstParamData::ConstParamData(_) => {
@@ -216,9 +214,9 @@ impl Generics {
     }
 
     /// Iterator over types and const params of parent.
-    pub(crate) fn iter_parent<'a>(
+    pub(crate) fn iter_parent(
-        &'a self,
+        &self,
-    ) -> impl DoubleEndedIterator<Item = (TypeOrConstParamId, &'a TypeOrConstParamData)> + 'a {
+    ) -> impl DoubleEndedIterator<Item = (TypeOrConstParamId, &TypeOrConstParamData)> {
         self.parent_generics().into_iter().flat_map(|it| {
             let to_toc_id =
                 move |(local_id, p)| (TypeOrConstParamId { parent: it.def, local_id }, p);

crates/ide/src/doc_links.rs

@@ -285,7 +285,7 @@ impl DocCommentToken {
     }
 }
 
-fn broken_link_clone_cb<'a>(link: BrokenLink<'a>) -> Option<(CowStr<'a>, CowStr<'a>)> {
+fn broken_link_clone_cb(link: BrokenLink<'_>) -> Option<(CowStr<'_>, CowStr<'_>)> {
     Some((/*url*/ link.reference.clone(), /*title*/ link.reference))
 }
 

crates/mbe/src/parser.rs

@@ -116,9 +116,9 @@ enum Mode {
     Template,
 }
 
-fn next_op<'a>(
+fn next_op(
     first_peeked: &tt::TokenTree,
-    src: &mut TtIter<'a>,
+    src: &mut TtIter<'_>,
     mode: Mode,
 ) -> Result<Op, ParseError> {
     let res = match first_peeked {

crates/project-model/src/cargo_workspace.rs

@@ -411,7 +411,7 @@ impl CargoWorkspace {
         CargoWorkspace { packages, targets, workspace_root }
     }
 
-    pub fn packages<'a>(&'a self) -> impl Iterator<Item = Package> + ExactSizeIterator + 'a {
+    pub fn packages(&self) -> impl Iterator<Item = Package> + ExactSizeIterator + '_ {
         self.packages.iter().map(|(id, _pkg)| id)
     }