diff --git a/crates/hir/src/attrs.rs b/crates/hir/src/attrs.rs
index e71b51bfa432..b9f2e5a3e997 100644
--- a/crates/hir/src/attrs.rs
+++ b/crates/hir/src/attrs.rs
@@ -226,9 +226,9 @@ fn resolve_assoc_or_field(
     resolve_field(db, variant_def, name, ns)
 }
 
-fn resolve_assoc_item(
-    db: &dyn HirDatabase,
-    ty: &Type,
+fn resolve_assoc_item<'db>(
+    db: &'db dyn HirDatabase,
+    ty: &Type<'db>,
     name: &Name,
     ns: Option<Namespace>,
 ) -> Option<DocLinkDef> {
@@ -240,10 +240,10 @@ fn resolve_assoc_item(
     })
 }
 
-fn resolve_impl_trait_item(
-    db: &dyn HirDatabase,
+fn resolve_impl_trait_item<'db>(
+    db: &'db dyn HirDatabase,
     resolver: Resolver,
-    ty: &Type,
+    ty: &Type<'db>,
     name: &Name,
     ns: Option<Namespace>,
 ) -> Option<DocLinkDef> {
diff --git a/crates/hir/src/diagnostics.rs b/crates/hir/src/diagnostics.rs
index 651ec151d40c..3e093de94432 100644
--- a/crates/hir/src/diagnostics.rs
+++ b/crates/hir/src/diagnostics.rs
@@ -35,15 +35,15 @@ pub use hir_ty::{
 };
 
 macro_rules! diagnostics {
-    ($($diag:ident,)*) => {
+    ($($diag:ident $(<$lt:lifetime>)?,)*) => {
         #[derive(Debug)]
-        pub enum AnyDiagnostic {$(
-            $diag(Box<$diag>),
+        pub enum AnyDiagnostic<'db> {$(
+            $diag(Box<$diag $(<$lt>)?>),
         )*}
 
         $(
-            impl From<$diag> for AnyDiagnostic {
-                fn from(d: $diag) -> AnyDiagnostic {
+            impl<'db> From<$diag $(<$lt>)?> for AnyDiagnostic<'db> {
+                fn from(d: $diag $(<$lt>)?) -> AnyDiagnostic<'db> {
                     AnyDiagnostic::$diag(Box::new(d))
                 }
             }
@@ -68,12 +68,12 @@ macro_rules! diagnostics {
 diagnostics![
     AwaitOutsideOfAsync,
     BreakOutsideOfLoop,
-    CastToUnsized,
-    ExpectedFunction,
+    CastToUnsized<'db>,
+    ExpectedFunction<'db>,
     InactiveCode,
     IncoherentImpl,
     IncorrectCase,
-    InvalidCast,
+    InvalidCast<'db>,
     InvalidDeriveTarget,
     MacroDefError,
     MacroError,
@@ -84,7 +84,7 @@ diagnostics![
     MissingFields,
     MissingMatchArms,
     MissingUnsafe,
-    MovedOutOfRef,
+    MovedOutOfRef<'db>,
     NeedMut,
     NonExhaustiveLet,
     NoSuchField,
@@ -97,17 +97,17 @@ diagnostics![
     TraitImplMissingAssocItems,
     TraitImplOrphan,
     TraitImplRedundantAssocItems,
-    TypedHole,
-    TypeMismatch,
+    TypedHole<'db>,
+    TypeMismatch<'db>,
     UndeclaredLabel,
     UnimplementedBuiltinMacro,
     UnreachableLabel,
     UnresolvedAssocItem,
     UnresolvedExternCrate,
-    UnresolvedField,
+    UnresolvedField<'db>,
     UnresolvedImport,
     UnresolvedMacroCall,
-    UnresolvedMethodCall,
+    UnresolvedMethodCall<'db>,
     UnresolvedModule,
     UnresolvedIdent,
     UnusedMut,
@@ -125,9 +125,9 @@ pub struct BreakOutsideOfLoop {
 }
 
 #[derive(Debug)]
-pub struct TypedHole {
+pub struct TypedHole<'db> {
     pub expr: InFile<ExprOrPatPtr>,
-    pub expected: Type,
+    pub expected: Type<'db>,
 }
 
 #[derive(Debug)]
@@ -237,25 +237,25 @@ pub struct MismatchedTupleStructPatArgCount {
 }
 
 #[derive(Debug)]
-pub struct ExpectedFunction {
+pub struct ExpectedFunction<'db> {
     pub call: InFile<ExprOrPatPtr>,
-    pub found: Type,
+    pub found: Type<'db>,
 }
 
 #[derive(Debug)]
-pub struct UnresolvedField {
+pub struct UnresolvedField<'db> {
     pub expr: InFile<ExprOrPatPtr>,
-    pub receiver: Type,
+    pub receiver: Type<'db>,
     pub name: Name,
     pub method_with_same_name_exists: bool,
 }
 
 #[derive(Debug)]
-pub struct UnresolvedMethodCall {
+pub struct UnresolvedMethodCall<'db> {
     pub expr: InFile<ExprOrPatPtr>,
-    pub receiver: Type,
+    pub receiver: Type<'db>,
     pub name: Name,
-    pub field_with_same_name: Option<Type>,
+    pub field_with_same_name: Option<Type<'db>>,
     pub assoc_func_with_same_name: Option<Function>,
 }
 
@@ -324,10 +324,10 @@ pub struct NonExhaustiveLet {
 }
 
 #[derive(Debug)]
-pub struct TypeMismatch {
+pub struct TypeMismatch<'db> {
     pub expr_or_pat: InFile<ExprOrPatPtr>,
-    pub expected: Type,
-    pub actual: Type,
+    pub expected: Type<'db>,
+    pub actual: Type<'db>,
 }
 
 #[derive(Debug)]
@@ -347,8 +347,8 @@ pub struct UnusedVariable {
 }
 
 #[derive(Debug)]
-pub struct MovedOutOfRef {
-    pub ty: Type,
+pub struct MovedOutOfRef<'db> {
+    pub ty: Type<'db>,
     pub span: InFile<SyntaxNodePtr>,
 }
 
@@ -398,17 +398,17 @@ pub struct RemoveUnnecessaryElse {
 }
 
 #[derive(Debug)]
-pub struct CastToUnsized {
+pub struct CastToUnsized<'db> {
     pub expr: InFile<ExprOrPatPtr>,
-    pub cast_ty: Type,
+    pub cast_ty: Type<'db>,
 }
 
 #[derive(Debug)]
-pub struct InvalidCast {
+pub struct InvalidCast<'db> {
     pub expr: InFile<ExprOrPatPtr>,
     pub error: CastError,
-    pub expr_ty: Type,
-    pub cast_ty: Type,
+    pub expr_ty: Type<'db>,
+    pub cast_ty: Type<'db>,
 }
 
 #[derive(Debug)]
@@ -427,12 +427,12 @@ pub struct BadRtn {
     pub rtn: InFile<AstPtr<ast::ReturnTypeSyntax>>,
 }
 
-impl AnyDiagnostic {
+impl<'db> AnyDiagnostic<'db> {
     pub(crate) fn body_validation_diagnostic(
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         diagnostic: BodyValidationDiagnostic,
         source_map: &hir_def::expr_store::BodySourceMap,
-    ) -> Option<AnyDiagnostic> {
+    ) -> Option<AnyDiagnostic<'db>> {
         match diagnostic {
             BodyValidationDiagnostic::RecordMissingFields { record, variant, missed_fields } => {
                 let variant_data = variant.variant_data(db.upcast());
@@ -563,12 +563,12 @@ impl AnyDiagnostic {
     }
 
     pub(crate) fn inference_diagnostic(
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         def: DefWithBodyId,
         d: &InferenceDiagnostic,
         outer_types_source_map: &TypesSourceMap,
         source_map: &hir_def::expr_store::BodySourceMap,
-    ) -> Option<AnyDiagnostic> {
+    ) -> Option<AnyDiagnostic<'db>> {
         let expr_syntax = |expr| {
             source_map
                 .expr_syntax(expr)
@@ -722,7 +722,7 @@ impl AnyDiagnostic {
     fn path_diagnostic(
         diag: &PathLoweringDiagnostic,
         path: InFile<ast::Path>,
-    ) -> Option<AnyDiagnostic> {
+    ) -> Option<AnyDiagnostic<'db>> {
         Some(match *diag {
             PathLoweringDiagnostic::GenericArgsProhibited { segment, reason } => {
                 let segment = hir_segment_to_ast_segment(&path.value, segment)?;
@@ -758,8 +758,8 @@ impl AnyDiagnostic {
     pub(crate) fn ty_diagnostic(
         diag: &TyLoweringDiagnostic,
         source_map: &TypesSourceMap,
-        db: &dyn HirDatabase,
-    ) -> Option<AnyDiagnostic> {
+        db: &'db dyn HirDatabase,
+    ) -> Option<AnyDiagnostic<'db>> {
         let source = match diag.source {
             Either::Left(type_ref_id) => {
                 let Ok(source) = source_map.type_syntax(type_ref_id) else {
diff --git a/crates/hir/src/display.rs b/crates/hir/src/display.rs
index 673c336cc364..dccd10dbd2d6 100644
--- a/crates/hir/src/display.rs
+++ b/crates/hir/src/display.rs
@@ -429,7 +429,7 @@ impl HirDisplay for Variant {
     }
 }
 
-impl HirDisplay for Type {
+impl HirDisplay for Type<'_> {
     fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> {
         self.ty.hir_fmt(f)
     }
@@ -748,7 +748,7 @@ impl HirDisplay for Static {
     }
 }
 
-impl HirDisplay for TraitRef {
+impl HirDisplay for TraitRef<'_> {
     fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> {
         self.trait_ref.hir_fmt(f)
     }
diff --git a/crates/hir/src/has_source.rs b/crates/hir/src/has_source.rs
index 3d9c04d38748..5aafcf60810e 100644
--- a/crates/hir/src/has_source.rs
+++ b/crates/hir/src/has_source.rs
@@ -234,7 +234,7 @@ impl HasSource for LocalSource {
     }
 }
 
-impl HasSource for Param {
+impl HasSource for Param<'_> {
     type Ast = Either<ast::SelfParam, ast::Param>;
 
     fn source(self, db: &dyn HirDatabase) -> Option<InFile<Self::Ast>> {
diff --git a/crates/hir/src/lib.rs b/crates/hir/src/lib.rs
index 870967e84aa2..100bc70121db 100644
--- a/crates/hir/src/lib.rs
+++ b/crates/hir/src/lib.rs
@@ -83,7 +83,7 @@ use nameres::diagnostics::DefDiagnosticKind;
 use rustc_hash::FxHashSet;
 use smallvec::SmallVec;
 use span::{Edition, EditionedFileId, FileId, MacroCallId};
-use stdx::{format_to, impl_from, never};
+use stdx::{format_to, impl_from, never, variance::PhantomCovariantLifetime};
 use syntax::{
     AstNode, AstPtr, SmolStr, SyntaxNode, SyntaxNodePtr, T, TextRange, ToSmolStr,
     ast::{self, HasAttrs as _, HasGenericParams, HasName},
@@ -401,7 +401,11 @@ impl ModuleDef {
         Some(name)
     }
 
-    pub fn diagnostics(self, db: &dyn HirDatabase, style_lints: bool) -> Vec<AnyDiagnostic> {
+    pub fn diagnostics<'db>(
+        self,
+        db: &'db dyn HirDatabase,
+        style_lints: bool,
+    ) -> Vec<AnyDiagnostic<'db>> {
         let id = match self {
             ModuleDef::Adt(it) => match it {
                 Adt::Struct(it) => it.id.into(),
@@ -614,10 +618,10 @@ impl Module {
     }
 
     /// Fills `acc` with the module's diagnostics.
-    pub fn diagnostics(
+    pub fn diagnostics<'db>(
         self,
-        db: &dyn HirDatabase,
-        acc: &mut Vec<AnyDiagnostic>,
+        db: &'db dyn HirDatabase,
+        acc: &mut Vec<AnyDiagnostic<'db>>,
         style_lints: bool,
     ) {
         let _p = tracing::info_span!("diagnostics", name = ?self.name(db)).entered();
@@ -930,10 +934,10 @@ impl Module {
     }
 }
 
-fn macro_call_diagnostics(
-    db: &dyn HirDatabase,
+fn macro_call_diagnostics<'db>(
+    db: &'db dyn HirDatabase,
     macro_call_id: MacroCallId,
-    acc: &mut Vec<AnyDiagnostic>,
+    acc: &mut Vec<AnyDiagnostic<'db>>,
 ) {
     let Some(e) = db.parse_macro_expansion_error(macro_call_id) else {
         return;
@@ -969,7 +973,11 @@ fn macro_call_diagnostics(
     }
 }
 
-fn emit_macro_def_diagnostics(db: &dyn HirDatabase, acc: &mut Vec<AnyDiagnostic>, m: Macro) {
+fn emit_macro_def_diagnostics<'db>(
+    db: &'db dyn HirDatabase,
+    acc: &mut Vec<AnyDiagnostic<'db>>,
+    m: Macro,
+) {
     let id = db.macro_def(m.id);
     if let hir_expand::db::TokenExpander::DeclarativeMacro(expander) = db.macro_expander(id) {
         if let Some(e) = expander.mac.err() {
@@ -989,18 +997,18 @@ fn emit_macro_def_diagnostics(db: &dyn HirDatabase, acc: &mut Vec<AnyDiagnostic>
     }
 }
 
-fn emit_def_diagnostic(
-    db: &dyn HirDatabase,
-    acc: &mut Vec<AnyDiagnostic>,
+fn emit_def_diagnostic<'db>(
+    db: &'db dyn HirDatabase,
+    acc: &mut Vec<AnyDiagnostic<'db>>,
     diag: &DefDiagnostic,
     edition: Edition,
 ) {
     emit_def_diagnostic_(db, acc, &diag.kind, edition)
 }
 
-fn emit_def_diagnostic_(
-    db: &dyn HirDatabase,
-    acc: &mut Vec<AnyDiagnostic>,
+fn emit_def_diagnostic_<'db>(
+    db: &'db dyn HirDatabase,
+    acc: &mut Vec<AnyDiagnostic<'db>>,
     diag: &DefDiagnosticKind,
     edition: Edition,
 ) {
@@ -1285,14 +1293,18 @@ impl TupleField {
         Name::new_tuple_field(self.index as usize)
     }
 
-    pub fn ty(&self, db: &dyn HirDatabase) -> Type {
+    pub fn ty<'db>(&self, db: &'db dyn HirDatabase) -> Type<'db> {
         let ty = db.infer(self.owner).tuple_field_access_types[&self.tuple]
             .as_slice(Interner)
             .get(self.index as usize)
             .and_then(|arg| arg.ty(Interner))
             .cloned()
             .unwrap_or_else(|| TyKind::Error.intern(Interner));
-        Type { env: db.trait_environment_for_body(self.owner), ty }
+        Type {
+            env: db.trait_environment_for_body(self.owner),
+            ty,
+            _pd: PhantomCovariantLifetime::new(),
+        }
     }
 }
 
@@ -1343,7 +1355,7 @@ impl Field {
     /// Returns the type as in the signature of the struct (i.e., with
     /// placeholder types for type parameters). Only use this in the context of
     /// the field definition.
-    pub fn ty(&self, db: &dyn HirDatabase) -> Type {
+    pub fn ty<'db>(&self, db: &'db dyn HirDatabase) -> Type<'db> {
         let var_id = self.parent.into();
         let generic_def_id: GenericDefId = match self.parent {
             VariantDef::Struct(it) => it.id.into(),
@@ -1356,7 +1368,11 @@ impl Field {
     }
 
     // FIXME: Find better API to also handle const generics
-    pub fn ty_with_args(&self, db: &dyn HirDatabase, generics: impl Iterator<Item = Type>) -> Type {
+    pub fn ty_with_args<'db>(
+        &self,
+        db: &'db dyn HirDatabase,
+        generics: impl Iterator<Item = Type<'db>>,
+    ) -> Type<'db> {
         let var_id = self.parent.into();
         let def_id: AdtId = match self.parent {
             VariantDef::Struct(it) => it.id.into(),
@@ -1428,15 +1444,15 @@ impl Struct {
             .collect()
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_def(db, self.id)
     }
 
-    pub fn ty_placeholders(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty_placeholders(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_def_placeholders(db, self.id)
     }
 
-    pub fn constructor_ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn constructor_ty(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_value_def(db, self.id)
     }
 
@@ -1477,15 +1493,15 @@ impl Union {
         Module { id: self.id.lookup(db.upcast()).container }
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_def(db, self.id)
     }
 
-    pub fn ty_placeholders(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty_placeholders(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_def_placeholders(db, self.id)
     }
 
-    pub fn constructor_ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn constructor_ty(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_value_def(db, self.id)
     }
 
@@ -1538,16 +1554,16 @@ impl Enum {
         db.enum_data(self.id).repr
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty<'db>(self, db: &'db dyn HirDatabase) -> Type<'db> {
         Type::from_def(db, self.id)
     }
 
-    pub fn ty_placeholders(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty_placeholders<'db>(self, db: &'db dyn HirDatabase) -> Type<'db> {
         Type::from_def_placeholders(db, self.id)
     }
 
     /// The type of the enum variant bodies.
-    pub fn variant_body_ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn variant_body_ty<'db>(self, db: &'db dyn HirDatabase) -> Type<'db> {
         Type::new_for_crate(
             self.id.lookup(db.upcast()).container.krate(),
             TyBuilder::builtin(match db.enum_data(self.id).variant_body_type() {
@@ -1620,7 +1636,7 @@ impl Variant {
         self.id.lookup(db.upcast()).parent.into()
     }
 
-    pub fn constructor_ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn constructor_ty(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_value_def(db, self.id)
     }
 
@@ -1712,14 +1728,18 @@ impl Adt {
     /// Turns this ADT into a type. Any type parameters of the ADT will be
     /// turned into unknown types, which is good for e.g. finding the most
     /// general set of completions, but will not look very nice when printed.
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(self, db: &dyn HirDatabase) -> Type<'_> {
         let id = AdtId::from(self);
         Type::from_def(db, id)
     }
 
     /// Turns this ADT into a type with the given type parameters. This isn't
     /// the greatest API, FIXME find a better one.
-    pub fn ty_with_args(self, db: &dyn HirDatabase, args: impl Iterator<Item = Type>) -> Type {
+    pub fn ty_with_args<'db>(
+        self,
+        db: &'db dyn HirDatabase,
+        args: impl Iterator<Item = Type<'db>>,
+    ) -> Type<'db> {
         let id = AdtId::from(self);
         let mut it = args.map(|t| t.ty);
         let ty = TyBuilder::def_ty(db, id.into(), None)
@@ -1863,7 +1883,7 @@ impl DefWithBody {
     }
 
     /// Returns the type this def's body has to evaluate to.
-    pub fn body_type(self, db: &dyn HirDatabase) -> Type {
+    pub fn body_type(self, db: &dyn HirDatabase) -> Type<'_> {
         match self {
             DefWithBody::Function(it) => it.ret_type(db),
             DefWithBody::Static(it) => it.ty(db),
@@ -1902,10 +1922,10 @@ impl DefWithBody {
         }
     }
 
-    pub fn diagnostics(
+    pub fn diagnostics<'db>(
         self,
-        db: &dyn HirDatabase,
-        acc: &mut Vec<AnyDiagnostic>,
+        db: &'db dyn HirDatabase,
+        acc: &mut Vec<AnyDiagnostic<'db>>,
         style_lints: bool,
     ) {
         let krate = self.module(db).id.krate();
@@ -2207,11 +2227,11 @@ impl Function {
         db.function_data(self.id).name.clone()
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_value_def(db, self.id)
     }
 
-    pub fn fn_ptr_type(self, db: &dyn HirDatabase) -> Type {
+    pub fn fn_ptr_type(self, db: &dyn HirDatabase) -> Type<'_> {
         let resolver = self.id.resolver(db.upcast());
         let substs = TyBuilder::placeholder_subst(db, self.id);
         let callable_sig = db.callable_item_signature(self.id.into()).substitute(Interner, &substs);
@@ -2220,7 +2240,7 @@ impl Function {
     }
 
     /// Get this function's return type
-    pub fn ret_type(self, db: &dyn HirDatabase) -> Type {
+    pub fn ret_type(self, db: &dyn HirDatabase) -> Type<'_> {
         let resolver = self.id.resolver(db.upcast());
         let substs = TyBuilder::placeholder_subst(db, self.id);
         let callable_sig = db.callable_item_signature(self.id.into()).substitute(Interner, &substs);
@@ -2229,11 +2249,11 @@ impl Function {
     }
 
     // FIXME: Find better API to also handle const generics
-    pub fn ret_type_with_args(
+    pub fn ret_type_with_args<'db>(
         self,
-        db: &dyn HirDatabase,
-        generics: impl Iterator<Item = Type>,
-    ) -> Type {
+        db: &'db dyn HirDatabase,
+        generics: impl Iterator<Item = Type<'db>>,
+    ) -> Type<'db> {
         let resolver = self.id.resolver(db.upcast());
         let parent_id: Option<GenericDefId> = match self.id.lookup(db.upcast()).container {
             ItemContainerId::ImplId(it) => Some(it.into()),
@@ -2258,7 +2278,7 @@ impl Function {
         Type::new_with_resolver_inner(db, &resolver, ty)
     }
 
-    pub fn async_ret_type(self, db: &dyn HirDatabase) -> Option<Type> {
+    pub fn async_ret_type<'db>(self, db: &'db dyn HirDatabase) -> Option<Type<'db>> {
         if !self.is_async(db) {
             return None;
         }
@@ -2282,7 +2302,7 @@ impl Function {
         self.has_self_param(db).then_some(SelfParam { func: self.id })
     }
 
-    pub fn assoc_fn_params(self, db: &dyn HirDatabase) -> Vec<Param> {
+    pub fn assoc_fn_params(self, db: &dyn HirDatabase) -> Vec<Param<'_>> {
         let environment = db.trait_environment(self.id.into());
         let substs = TyBuilder::placeholder_subst(db, self.id);
         let callable_sig = db.callable_item_signature(self.id.into()).substitute(Interner, &substs);
@@ -2291,7 +2311,11 @@ impl Function {
             .iter()
             .enumerate()
             .map(|(idx, ty)| {
-                let ty = Type { env: environment.clone(), ty: ty.clone() };
+                let ty = Type {
+                    env: environment.clone(),
+                    ty: ty.clone(),
+                    _pd: PhantomCovariantLifetime::new(),
+                };
                 Param { func: Callee::Def(CallableDefId::FunctionId(self.id)), ty, idx }
             })
             .collect()
@@ -2301,12 +2325,12 @@ impl Function {
         db.function_data(self.id).params.len()
     }
 
-    pub fn method_params(self, db: &dyn HirDatabase) -> Option<Vec<Param>> {
+    pub fn method_params(self, db: &dyn HirDatabase) -> Option<Vec<Param<'_>>> {
         self.self_param(db)?;
         Some(self.params_without_self(db))
     }
 
-    pub fn params_without_self(self, db: &dyn HirDatabase) -> Vec<Param> {
+    pub fn params_without_self(self, db: &dyn HirDatabase) -> Vec<Param<'_>> {
         let environment = db.trait_environment(self.id.into());
         let substs = TyBuilder::placeholder_subst(db, self.id);
         let callable_sig = db.callable_item_signature(self.id.into()).substitute(Interner, &substs);
@@ -2317,18 +2341,22 @@ impl Function {
             .enumerate()
             .skip(skip)
             .map(|(idx, ty)| {
-                let ty = Type { env: environment.clone(), ty: ty.clone() };
+                let ty = Type {
+                    env: environment.clone(),
+                    ty: ty.clone(),
+                    _pd: PhantomCovariantLifetime::new(),
+                };
                 Param { func: Callee::Def(CallableDefId::FunctionId(self.id)), ty, idx }
             })
             .collect()
     }
 
     // FIXME: Find better API to also handle const generics
-    pub fn params_without_self_with_args(
+    pub fn params_without_self_with_args<'db>(
         self,
-        db: &dyn HirDatabase,
-        generics: impl Iterator<Item = Type>,
-    ) -> Vec<Param> {
+        db: &'db dyn HirDatabase,
+        generics: impl Iterator<Item = Type<'db>>,
+    ) -> Vec<Param<'db>> {
         let environment = db.trait_environment(self.id.into());
         let parent_id: Option<GenericDefId> = match self.id.lookup(db.upcast()).container {
             ItemContainerId::ImplId(it) => Some(it.into()),
@@ -2363,7 +2391,11 @@ impl Function {
             .enumerate()
             .skip(skip)
             .map(|(idx, ty)| {
-                let ty = Type { env: environment.clone(), ty: ty.clone() };
+                let ty = Type {
+                    env: environment.clone(),
+                    ty: ty.clone(),
+                    _pd: PhantomCovariantLifetime::new(),
+                };
                 Param { func: Callee::Def(CallableDefId::FunctionId(self.id)), ty, idx }
             })
             .collect()
@@ -2393,7 +2425,8 @@ impl Function {
             return true;
         }
 
-        let Some(impl_traits) = self.ret_type(db).as_impl_traits(db) else { return false };
+        let ret_type = self.ret_type(db);
+        let Some(impl_traits) = ret_type.as_impl_traits(db) else { return false };
         let Some(future_trait_id) =
             db.lang_item(self.ty(db).env.krate, LangItem::Future).and_then(|t| t.as_trait())
         else {
@@ -2539,14 +2572,14 @@ impl From<hir_ty::Mutability> for Access {
 }
 
 #[derive(Clone, PartialEq, Eq, Hash, Debug)]
-pub struct Param {
+pub struct Param<'db> {
     func: Callee,
     /// The index in parameter list, including self parameter.
     idx: usize,
-    ty: Type,
+    ty: Type<'db>,
 }
 
-impl Param {
+impl<'db> Param<'db> {
     pub fn parent_fn(&self) -> Option<Function> {
         match self.func {
             Callee::Def(CallableDefId::FunctionId(f)) => Some(f.into()),
@@ -2562,7 +2595,7 @@ impl Param {
         self.idx
     }
 
-    pub fn ty(&self) -> &Type {
+    pub fn ty(&self) -> &Type<'db> {
         &self.ty
     }
 
@@ -2629,17 +2662,21 @@ impl SelfParam {
         Function::from(self.func)
     }
 
-    pub fn ty(&self, db: &dyn HirDatabase) -> Type {
+    pub fn ty<'db>(&self, db: &'db dyn HirDatabase) -> Type<'db> {
         let substs = TyBuilder::placeholder_subst(db, self.func);
         let callable_sig =
             db.callable_item_signature(self.func.into()).substitute(Interner, &substs);
         let environment = db.trait_environment(self.func.into());
         let ty = callable_sig.params()[0].clone();
-        Type { env: environment, ty }
+        Type { env: environment, ty, _pd: PhantomCovariantLifetime::new() }
     }
 
     // FIXME: Find better API to also handle const generics
-    pub fn ty_with_args(&self, db: &dyn HirDatabase, generics: impl Iterator<Item = Type>) -> Type {
+    pub fn ty_with_args<'db>(
+        &self,
+        db: &'db dyn HirDatabase,
+        generics: impl Iterator<Item = Type<'db>>,
+    ) -> Type<'db> {
         let parent_id: GenericDefId = match self.func.lookup(db.upcast()).container {
             ItemContainerId::ImplId(it) => it.into(),
             ItemContainerId::TraitId(it) => it.into(),
@@ -2664,7 +2701,7 @@ impl SelfParam {
             db.callable_item_signature(self.func.into()).substitute(Interner, &substs);
         let environment = db.trait_environment(self.func.into());
         let ty = callable_sig.params()[0].clone();
-        Type { env: environment, ty }
+        Type { env: environment, ty, _pd: PhantomCovariantLifetime::new() }
     }
 }
 
@@ -2744,7 +2781,7 @@ impl Const {
         self.source(db)?.value.body()
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_value_def(db, self.id)
     }
 
@@ -2821,7 +2858,7 @@ impl Static {
         self.source(db)?.value.body()
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_value_def(db, self.id)
     }
 
@@ -2990,11 +3027,11 @@ impl TypeAlias {
         Module { id: self.id.module(db.upcast()) }
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_def(db, self.id)
     }
 
-    pub fn ty_placeholders(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty_placeholders(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::from_def_placeholders(db, self.id)
     }
 
@@ -3041,7 +3078,7 @@ impl BuiltinType {
         BuiltinType { inner: hir_def::builtin_type::BuiltinType::Str }
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty<'db>(self, db: &'db dyn HirDatabase) -> Type<'db> {
         let core = Crate::core(db).map(|core| core.id).unwrap_or_else(|| db.all_crates()[0]);
         Type::new_for_crate(core, TyBuilder::builtin(self.inner))
     }
@@ -3485,7 +3522,7 @@ impl AssocItem {
         }
     }
 
-    pub fn implementing_ty(self, db: &dyn HirDatabase) -> Option<Type> {
+    pub fn implementing_ty(self, db: &dyn HirDatabase) -> Option<Type<'_>> {
         match self.container(db) {
             AssocItemContainer::Impl(i) => Some(i.self_ty(db)),
             _ => None,
@@ -3513,10 +3550,10 @@ impl AssocItem {
         }
     }
 
-    pub fn diagnostics(
+    pub fn diagnostics<'db>(
         self,
-        db: &dyn HirDatabase,
-        acc: &mut Vec<AnyDiagnostic>,
+        db: &'db dyn HirDatabase,
+        acc: &mut Vec<AnyDiagnostic<'db>>,
         style_lints: bool,
     ) {
         match self {
@@ -3639,7 +3676,7 @@ impl GenericDef {
         }
     }
 
-    pub fn diagnostics(self, db: &dyn HirDatabase, acc: &mut Vec<AnyDiagnostic>) {
+    pub fn diagnostics<'db>(self, db: &'db dyn HirDatabase, acc: &mut Vec<AnyDiagnostic<'db>>) {
         let def = self.id();
 
         let item_tree_source_maps;
@@ -3722,18 +3759,19 @@ impl GenericDef {
 
 // We cannot call this `Substitution` unfortunately...
 #[derive(Debug)]
-pub struct GenericSubstitution {
+pub struct GenericSubstitution<'db> {
     def: GenericDefId,
     subst: Substitution,
     env: Arc<TraitEnvironment>,
+    _pd: PhantomCovariantLifetime<'db>,
 }
 
-impl GenericSubstitution {
+impl<'db> GenericSubstitution<'db> {
     fn new(def: GenericDefId, subst: Substitution, env: Arc<TraitEnvironment>) -> Self {
-        Self { def, subst, env }
+        Self { def, subst, env, _pd: PhantomCovariantLifetime::new() }
     }
 
-    pub fn types(&self, db: &dyn HirDatabase) -> Vec<(Symbol, Type)> {
+    pub fn types(&self, db: &'db dyn HirDatabase) -> Vec<(Symbol, Type<'db>)> {
         let container = match self.def {
             GenericDefId::ConstId(id) => Some(id.lookup(db.upcast()).container),
             GenericDefId::FunctionId(id) => Some(id.lookup(db.upcast()).container),
@@ -3769,7 +3807,10 @@ impl GenericSubstitution {
         container_params
             .chain(self_params)
             .filter_map(|(ty, name)| {
-                Some((name?.symbol().clone(), Type { ty, env: self.env.clone() }))
+                Some((
+                    name?.symbol().clone(),
+                    Type { ty, env: self.env.clone(), _pd: PhantomCovariantLifetime::new() },
+                ))
             })
             .collect()
     }
@@ -3872,7 +3913,7 @@ impl Local {
         self.parent(db).module(db)
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(self, db: &dyn HirDatabase) -> Type<'_> {
         let def = self.parent;
         let infer = db.infer(def);
         let ty = infer[self.binding_id].clone();
@@ -4155,7 +4196,7 @@ impl TypeParam {
         }
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(self, db: &dyn HirDatabase) -> Type<'_> {
         let resolver = self.id.parent().resolver(db.upcast());
         let ty =
             TyKind::Placeholder(hir_ty::to_placeholder_idx(db, self.id.into())).intern(Interner);
@@ -4177,7 +4218,7 @@ impl TypeParam {
             .collect()
     }
 
-    pub fn default(self, db: &dyn HirDatabase) -> Option<Type> {
+    pub fn default(self, db: &dyn HirDatabase) -> Option<Type<'_>> {
         let ty = generic_arg_from_param(db, self.id.into())?;
         let resolver = self.id.parent().resolver(db.upcast());
         match ty.data(Interner) {
@@ -4242,7 +4283,7 @@ impl ConstParam {
         self.id.parent().into()
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(self, db: &dyn HirDatabase) -> Type<'_> {
         Type::new(db, self.id.parent(), db.const_param_ty(self.id))
     }
 
@@ -4298,7 +4339,7 @@ impl TypeOrConstParam {
         }
     }
 
-    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(self, db: &dyn HirDatabase) -> Type<'_> {
         match self.split(db) {
             Either::Left(it) => it.ty(db),
             Either::Right(it) => it.ty(db),
@@ -4343,7 +4384,10 @@ impl Impl {
         module.id.def_map(db.upcast())[module.id.local_id].scope.impls().map(Into::into).collect()
     }
 
-    pub fn all_for_type(db: &dyn HirDatabase, Type { ty, env }: Type) -> Vec<Impl> {
+    pub fn all_for_type<'db>(
+        db: &'db dyn HirDatabase,
+        Type { ty, env, _pd: _ }: Type<'db>,
+    ) -> Vec<Impl> {
         let def_crates = match method_resolution::def_crates(db, &ty, env.krate) {
             Some(def_crates) => def_crates,
             None => return Vec::new(),
@@ -4429,14 +4473,14 @@ impl Impl {
         Some(Trait { id })
     }
 
-    pub fn trait_ref(self, db: &dyn HirDatabase) -> Option<TraitRef> {
+    pub fn trait_ref(self, db: &dyn HirDatabase) -> Option<TraitRef<'_>> {
         let substs = TyBuilder::placeholder_subst(db, self.id);
         let trait_ref = db.impl_trait(self.id)?.substitute(Interner, &substs);
         let resolver = self.id.resolver(db.upcast());
         Some(TraitRef::new_with_resolver(db, &resolver, trait_ref))
     }
 
-    pub fn self_ty(self, db: &dyn HirDatabase) -> Type {
+    pub fn self_ty(self, db: &dyn HirDatabase) -> Type<'_> {
         let resolver = self.id.resolver(db.upcast());
         let substs = TyBuilder::placeholder_subst(db, self.id);
         let ty = db.impl_self_ty(self.id).substitute(Interner, &substs);
@@ -4503,21 +4547,22 @@ impl Impl {
 }
 
 #[derive(Clone, PartialEq, Eq, Debug, Hash)]
-pub struct TraitRef {
+pub struct TraitRef<'db> {
     env: Arc<TraitEnvironment>,
     trait_ref: hir_ty::TraitRef,
+    _pd: PhantomCovariantLifetime<'db>,
 }
 
-impl TraitRef {
+impl<'db> TraitRef<'db> {
     pub(crate) fn new_with_resolver(
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         resolver: &Resolver,
         trait_ref: hir_ty::TraitRef,
-    ) -> TraitRef {
+    ) -> Self {
         let env = resolver
             .generic_def()
             .map_or_else(|| TraitEnvironment::empty(resolver.krate()), |d| db.trait_environment(d));
-        TraitRef { env, trait_ref }
+        TraitRef { env, trait_ref, _pd: PhantomCovariantLifetime::new() }
     }
 
     pub fn trait_(&self) -> Trait {
@@ -4525,21 +4570,21 @@ impl TraitRef {
         Trait { id }
     }
 
-    pub fn self_ty(&self) -> Type {
+    pub fn self_ty(&self) -> Type<'_> {
         let ty = self.trait_ref.self_type_parameter(Interner);
-        Type { env: self.env.clone(), ty }
+        Type { env: self.env.clone(), ty, _pd: PhantomCovariantLifetime::new() }
     }
 
     /// Returns `idx`-th argument of this trait reference if it is a type argument. Note that the
     /// first argument is the `Self` type.
-    pub fn get_type_argument(&self, idx: usize) -> Option<Type> {
+    pub fn get_type_argument(&self, idx: usize) -> Option<Type<'db>> {
         self.trait_ref
             .substitution
             .as_slice(Interner)
             .get(idx)
             .and_then(|arg| arg.ty(Interner))
             .cloned()
-            .map(|ty| Type { env: self.env.clone(), ty })
+            .map(|ty| Type { env: self.env.clone(), ty, _pd: PhantomCovariantLifetime::new() })
     }
 }
 
@@ -4587,7 +4632,7 @@ impl Closure {
             .collect()
     }
 
-    pub fn capture_types(&self, db: &dyn HirDatabase) -> Vec<Type> {
+    pub fn capture_types<'db>(&self, db: &'db dyn HirDatabase) -> Vec<Type<'db>> {
         let owner = db.lookup_intern_closure((self.id).into()).0;
         let infer = &db.infer(owner);
         let (captures, _) = infer.closure_info(&self.id);
@@ -4596,6 +4641,7 @@ impl Closure {
             .map(|capture| Type {
                 env: db.trait_environment_for_body(owner),
                 ty: capture.ty(&self.subst),
+                _pd: PhantomCovariantLifetime::new(),
             })
             .collect()
     }
@@ -4727,40 +4773,41 @@ impl CaptureUsageSource {
 }
 
 #[derive(Clone, PartialEq, Eq, Debug, Hash)]
-pub struct Type {
+pub struct Type<'db> {
     env: Arc<TraitEnvironment>,
     ty: Ty,
+    _pd: PhantomCovariantLifetime<'db>,
 }
 
-impl Type {
-    pub(crate) fn new_with_resolver(db: &dyn HirDatabase, resolver: &Resolver, ty: Ty) -> Type {
+impl<'db> Type<'db> {
+    pub(crate) fn new_with_resolver(db: &'db dyn HirDatabase, resolver: &Resolver, ty: Ty) -> Self {
         Type::new_with_resolver_inner(db, resolver, ty)
     }
 
     pub(crate) fn new_with_resolver_inner(
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         resolver: &Resolver,
         ty: Ty,
-    ) -> Type {
+    ) -> Self {
         let environment = resolver
             .generic_def()
             .map_or_else(|| TraitEnvironment::empty(resolver.krate()), |d| db.trait_environment(d));
-        Type { env: environment, ty }
+        Type { env: environment, ty, _pd: PhantomCovariantLifetime::new() }
     }
 
-    pub(crate) fn new_for_crate(krate: base_db::Crate, ty: Ty) -> Type {
-        Type { env: TraitEnvironment::empty(krate), ty }
+    pub(crate) fn new_for_crate(krate: base_db::Crate, ty: Ty) -> Self {
+        Type { env: TraitEnvironment::empty(krate), ty, _pd: PhantomCovariantLifetime::new() }
     }
 
-    fn new(db: &dyn HirDatabase, lexical_env: impl HasResolver, ty: Ty) -> Type {
+    fn new(db: &'db dyn HirDatabase, lexical_env: impl HasResolver, ty: Ty) -> Self {
         let resolver = lexical_env.resolver(db.upcast());
         let environment = resolver
             .generic_def()
             .map_or_else(|| TraitEnvironment::empty(resolver.krate()), |d| db.trait_environment(d));
-        Type { env: environment, ty }
+        Type { env: environment, ty, _pd: PhantomCovariantLifetime::new() }
     }
 
-    fn from_def(db: &dyn HirDatabase, def: impl Into<TyDefId> + HasResolver) -> Type {
+    fn from_def(db: &'db dyn HirDatabase, def: impl Into<TyDefId> + HasResolver) -> Self {
         let ty = db.ty(def.into());
         let substs = TyBuilder::unknown_subst(
             db,
@@ -4773,7 +4820,10 @@ impl Type {
         Type::new(db, def, ty.substitute(Interner, &substs))
     }
 
-    fn from_def_placeholders(db: &dyn HirDatabase, def: impl Into<TyDefId> + HasResolver) -> Type {
+    fn from_def_placeholders(
+        db: &'db dyn HirDatabase,
+        def: impl Into<TyDefId> + HasResolver,
+    ) -> Self {
         let ty = db.ty(def.into());
         let substs = TyBuilder::placeholder_subst(
             db,
@@ -4786,7 +4836,10 @@ impl Type {
         Type::new(db, def, ty.substitute(Interner, &substs))
     }
 
-    fn from_value_def(db: &dyn HirDatabase, def: impl Into<ValueTyDefId> + HasResolver) -> Type {
+    fn from_value_def(
+        db: &'db dyn HirDatabase,
+        def: impl Into<ValueTyDefId> + HasResolver,
+    ) -> Self {
         let Some(ty) = db.value_ty(def.into()) else {
             return Type::new(db, def, TyKind::Error.intern(Interner));
         };
@@ -4806,13 +4859,17 @@ impl Type {
         Type::new(db, def, ty.substitute(Interner, &substs))
     }
 
-    pub fn new_slice(ty: Type) -> Type {
-        Type { env: ty.env, ty: TyBuilder::slice(ty.ty) }
+    pub fn new_slice(ty: Self) -> Self {
+        Type { env: ty.env, ty: TyBuilder::slice(ty.ty), _pd: PhantomCovariantLifetime::new() }
     }
 
-    pub fn new_tuple(krate: base_db::Crate, tys: &[Type]) -> Type {
+    pub fn new_tuple(krate: base_db::Crate, tys: &[Self]) -> Self {
         let tys = tys.iter().map(|it| it.ty.clone());
-        Type { env: TraitEnvironment::empty(krate), ty: TyBuilder::tuple_with(tys) }
+        Type {
+            env: TraitEnvironment::empty(krate),
+            ty: TyBuilder::tuple_with(tys),
+            _pd: PhantomCovariantLifetime::new(),
+        }
     }
 
     pub fn is_unit(&self) -> bool {
@@ -4839,7 +4896,7 @@ impl Type {
         matches!(self.ty.kind(Interner), TyKind::Ref(..))
     }
 
-    pub fn contains_reference(&self, db: &dyn HirDatabase) -> bool {
+    pub fn contains_reference(&self, db: &'db dyn HirDatabase) -> bool {
         return go(db, self.env.krate, &self.ty);
 
         fn go(db: &dyn HirDatabase, krate: base_db::Crate, ty: &Ty) -> bool {
@@ -4883,13 +4940,13 @@ impl Type {
         }
     }
 
-    pub fn as_reference(&self) -> Option<(Type, Mutability)> {
+    pub fn as_reference(&self) -> Option<(Type<'db>, Mutability)> {
         let (ty, _lt, m) = self.ty.as_reference()?;
         let m = Mutability::from_mutable(matches!(m, hir_ty::Mutability::Mut));
         Some((self.derived(ty.clone()), m))
     }
 
-    pub fn add_reference(&self, mutability: Mutability) -> Type {
+    pub fn add_reference(&self, mutability: Mutability) -> Self {
         let ty_mutability = match mutability {
             Mutability::Shared => hir_ty::Mutability::Not,
             Mutability::Mut => hir_ty::Mutability::Mut,
@@ -4925,25 +4982,25 @@ impl Type {
         matches!(self.ty.kind(Interner), TyKind::Tuple(..))
     }
 
-    pub fn remove_ref(&self) -> Option<Type> {
+    pub fn remove_ref(&self) -> Option<Type<'db>> {
         match &self.ty.kind(Interner) {
             TyKind::Ref(.., ty) => Some(self.derived(ty.clone())),
             _ => None,
         }
     }
 
-    pub fn as_slice(&self) -> Option<Type> {
+    pub fn as_slice(&self) -> Option<Type<'db>> {
         match &self.ty.kind(Interner) {
             TyKind::Slice(ty) => Some(self.derived(ty.clone())),
             _ => None,
         }
     }
 
-    pub fn strip_references(&self) -> Type {
+    pub fn strip_references(&self) -> Self {
         self.derived(self.ty.strip_references().clone())
     }
 
-    pub fn strip_reference(&self) -> Type {
+    pub fn strip_reference(&self) -> Self {
         self.derived(self.ty.strip_reference().clone())
     }
 
@@ -4954,7 +5011,7 @@ impl Type {
     /// Checks that particular type `ty` implements `std::future::IntoFuture` or
     /// `std::future::Future` and returns the `Output` associated type.
     /// This function is used in `.await` syntax completion.
-    pub fn into_future_output(&self, db: &dyn HirDatabase) -> Option<Type> {
+    pub fn into_future_output(&self, db: &'db dyn HirDatabase) -> Option<Type<'db>> {
         let trait_ = db
             .lang_item(self.env.krate, LangItem::IntoFutureIntoFuture)
             .and_then(|it| {
@@ -4981,14 +5038,14 @@ impl Type {
     }
 
     /// This does **not** resolve `IntoFuture`, only `Future`.
-    pub fn future_output(self, db: &dyn HirDatabase) -> Option<Type> {
+    pub fn future_output(self, db: &'db dyn HirDatabase) -> Option<Type<'db>> {
         let future_output =
             db.lang_item(self.env.krate, LangItem::FutureOutput)?.as_type_alias()?;
         self.normalize_trait_assoc_type(db, &[], future_output.into())
     }
 
     /// This does **not** resolve `IntoIterator`, only `Iterator`.
-    pub fn iterator_item(self, db: &dyn HirDatabase) -> Option<Type> {
+    pub fn iterator_item(self, db: &'db dyn HirDatabase) -> Option<Type<'db>> {
         let iterator_trait = db.lang_item(self.env.krate, LangItem::Iterator)?.as_trait()?;
         let iterator_item = db
             .trait_items(iterator_trait)
@@ -4996,7 +5053,7 @@ impl Type {
         self.normalize_trait_assoc_type(db, &[], iterator_item.into())
     }
 
-    pub fn impls_iterator(self, db: &dyn HirDatabase) -> bool {
+    pub fn impls_iterator(self, db: &'db dyn HirDatabase) -> bool {
         let Some(iterator_trait) =
             db.lang_item(self.env.krate, LangItem::Iterator).and_then(|it| it.as_trait())
         else {
@@ -5008,7 +5065,7 @@ impl Type {
     }
 
     /// Resolves the projection `<Self as IntoIterator>::IntoIter` and returns the resulting type
-    pub fn into_iterator_iter(self, db: &dyn HirDatabase) -> Option<Type> {
+    pub fn into_iterator_iter(self, db: &'db dyn HirDatabase) -> Option<Type<'db>> {
         let trait_ = db.lang_item(self.env.krate, LangItem::IntoIterIntoIter).and_then(|it| {
             let into_iter_fn = it.as_function()?;
             let assoc_item = as_assoc_item(db, AssocItem::Function, into_iter_fn)?;
@@ -5032,7 +5089,7 @@ impl Type {
     ///
     /// This function can be used to check if a particular type is callable, since FnOnce is a
     /// supertrait of Fn and FnMut, so all callable types implements at least FnOnce.
-    pub fn impls_fnonce(&self, db: &dyn HirDatabase) -> bool {
+    pub fn impls_fnonce(&self, db: &'db dyn HirDatabase) -> bool {
         let fnonce_trait = match FnTrait::FnOnce.get_id(db, self.env.krate) {
             Some(it) => it,
             None => return false,
@@ -5044,7 +5101,7 @@ impl Type {
     }
 
     // FIXME: Find better API that also handles const generics
-    pub fn impls_trait(&self, db: &dyn HirDatabase, trait_: Trait, args: &[Type]) -> bool {
+    pub fn impls_trait(&self, db: &'db dyn HirDatabase, trait_: Trait, args: &[Type<'db>]) -> bool {
         let mut it = args.iter().map(|t| t.ty.clone());
         let trait_ref = TyBuilder::trait_ref(db, trait_.id)
             .push(self.ty.clone())
@@ -5072,10 +5129,10 @@ impl Type {
 
     pub fn normalize_trait_assoc_type(
         &self,
-        db: &dyn HirDatabase,
-        args: &[Type],
+        db: &'db dyn HirDatabase,
+        args: &[Type<'db>],
         alias: TypeAlias,
-    ) -> Option<Type> {
+    ) -> Option<Type<'db>> {
         let mut args = args.iter();
         let trait_id = match alias.id.lookup(db.upcast()).container {
             ItemContainerId::TraitId(id) => id,
@@ -5099,7 +5156,7 @@ impl Type {
         if ty.is_unknown() { None } else { Some(self.derived(ty)) }
     }
 
-    pub fn is_copy(&self, db: &dyn HirDatabase) -> bool {
+    pub fn is_copy(&self, db: &'db dyn HirDatabase) -> bool {
         let lang_item = db.lang_item(self.env.krate, LangItem::Copy);
         let copy_trait = match lang_item {
             Some(LangItemTarget::Trait(it)) => it,
@@ -5108,7 +5165,7 @@ impl Type {
         self.impls_trait(db, copy_trait.into(), &[])
     }
 
-    pub fn as_callable(&self, db: &dyn HirDatabase) -> Option<Callable> {
+    pub fn as_callable(&self, db: &'db dyn HirDatabase) -> Option<Callable<'db>> {
         let callee = match self.ty.kind(Interner) {
             TyKind::Closure(id, subst) => Callee::Closure(*id, subst.clone()),
             TyKind::Function(_) => Callee::FnPtr,
@@ -5162,7 +5219,7 @@ impl Type {
         matches!(self.ty.kind(Interner), TyKind::Array(..))
     }
 
-    pub fn is_packed(&self, db: &dyn HirDatabase) -> bool {
+    pub fn is_packed(&self, db: &'db dyn HirDatabase) -> bool {
         let adt_id = match *self.ty.kind(Interner) {
             TyKind::Adt(hir_ty::AdtId(adt_id), ..) => adt_id,
             _ => return false,
@@ -5179,7 +5236,7 @@ impl Type {
         matches!(self.ty.kind(Interner), TyKind::Raw(..))
     }
 
-    pub fn remove_raw_ptr(&self) -> Option<Type> {
+    pub fn remove_raw_ptr(&self) -> Option<Type<'db>> {
         if let TyKind::Raw(_, ty) = self.ty.kind(Interner) {
             Some(self.derived(ty.clone()))
         } else {
@@ -5227,7 +5284,7 @@ impl Type {
         }
     }
 
-    pub fn fields(&self, db: &dyn HirDatabase) -> Vec<(Field, Type)> {
+    pub fn fields(&self, db: &'db dyn HirDatabase) -> Vec<(Field, Self)> {
         let (variant_id, substs) = match self.ty.kind(Interner) {
             TyKind::Adt(hir_ty::AdtId(AdtId::StructId(s)), substs) => ((*s).into(), substs),
             TyKind::Adt(hir_ty::AdtId(AdtId::UnionId(u)), substs) => ((*u).into(), substs),
@@ -5244,7 +5301,7 @@ impl Type {
             .collect()
     }
 
-    pub fn tuple_fields(&self, _db: &dyn HirDatabase) -> Vec<Type> {
+    pub fn tuple_fields(&self, _db: &'db dyn HirDatabase) -> Vec<Self> {
         if let TyKind::Tuple(_, substs) = &self.ty.kind(Interner) {
             substs
                 .iter(Interner)
@@ -5255,7 +5312,7 @@ impl Type {
         }
     }
 
-    pub fn as_array(&self, db: &dyn HirDatabase) -> Option<(Type, usize)> {
+    pub fn as_array(&self, db: &'db dyn HirDatabase) -> Option<(Self, usize)> {
         if let TyKind::Array(ty, len) = &self.ty.kind(Interner) {
             try_const_usize(db, len).map(|it| (self.derived(ty.clone()), it as usize))
         } else {
@@ -5273,14 +5330,14 @@ impl Type {
 
     /// Returns types that this type dereferences to (including this type itself). The returned
     /// iterator won't yield the same type more than once even if the deref chain contains a cycle.
-    pub fn autoderef<'db>(
+    pub fn autoderef(
         &self,
         db: &'db dyn HirDatabase,
-    ) -> impl Iterator<Item = Type> + use<'_, 'db> {
+    ) -> impl Iterator<Item = Type<'db>> + use<'_, 'db> {
         self.autoderef_(db).map(move |ty| self.derived(ty))
     }
 
-    fn autoderef_(&self, db: &dyn HirDatabase) -> impl Iterator<Item = Ty> {
+    fn autoderef_(&self, db: &'db dyn HirDatabase) -> impl Iterator<Item = Ty> {
         // There should be no inference vars in types passed here
         let canonical = hir_ty::replace_errors_with_variables(&self.ty);
         autoderef(db, self.env.clone(), canonical)
@@ -5290,7 +5347,7 @@ impl Type {
     // lifetime problems, because we need to borrow temp `CrateImplDefs`.
     pub fn iterate_assoc_items<T>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         krate: Crate,
         mut callback: impl FnMut(AssocItem) -> Option<T>,
     ) -> Option<T> {
@@ -5304,7 +5361,7 @@ impl Type {
 
     fn iterate_assoc_items_dyn(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         krate: Crate,
         callback: &mut dyn FnMut(AssocItemId) -> bool,
     ) {
@@ -5343,7 +5400,7 @@ impl Type {
     /// - "String"
     /// - "U"
     /// ```
-    pub fn type_arguments(&self) -> impl Iterator<Item = Type> + '_ {
+    pub fn type_arguments(&self) -> impl Iterator<Item = Type<'db>> + '_ {
         self.ty
             .strip_references()
             .as_adt()
@@ -5413,7 +5470,7 @@ impl Type {
 
     pub fn iterate_method_candidates_with_traits<T>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         scope: &SemanticsScope<'_>,
         traits_in_scope: &FxHashSet<TraitId>,
         with_local_impls: Option<Module>,
@@ -5441,7 +5498,7 @@ impl Type {
 
     pub fn iterate_method_candidates<T>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         scope: &SemanticsScope<'_>,
         with_local_impls: Option<Module>,
         name: Option<&Name>,
@@ -5463,7 +5520,7 @@ impl Type {
     /// are considered inherent methods.
     pub fn iterate_method_candidates_split_inherent(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         scope: &SemanticsScope<'_>,
         traits_in_scope: &FxHashSet<TraitId>,
         with_local_impls: Option<Module>,
@@ -5531,7 +5588,7 @@ impl Type {
     #[tracing::instrument(skip_all, fields(name = ?name))]
     pub fn iterate_path_candidates<T>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         scope: &SemanticsScope<'_>,
         traits_in_scope: &FxHashSet<TraitId>,
         with_local_impls: Option<Module>,
@@ -5566,7 +5623,7 @@ impl Type {
     #[tracing::instrument(skip_all, fields(name = ?name))]
     pub fn iterate_path_candidates_split_inherent(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         scope: &SemanticsScope<'_>,
         traits_in_scope: &FxHashSet<TraitId>,
         with_local_impls: Option<Module>,
@@ -5629,10 +5686,10 @@ impl Type {
 
     /// If a type can be represented as `dyn Trait`, returns all traits accessible via this type,
     /// or an empty iterator otherwise.
-    pub fn applicable_inherent_traits<'a>(
-        &'a self,
-        db: &'a dyn HirDatabase,
-    ) -> impl Iterator<Item = Trait> + 'a {
+    pub fn applicable_inherent_traits(
+        &self,
+        db: &'db dyn HirDatabase,
+    ) -> impl Iterator<Item = Trait> {
         let _p = tracing::info_span!("applicable_inherent_traits").entered();
         self.autoderef_(db)
             .filter_map(|ty| ty.dyn_trait())
@@ -5640,7 +5697,7 @@ impl Type {
             .map(Trait::from)
     }
 
-    pub fn env_traits<'a>(&'a self, db: &'a dyn HirDatabase) -> impl Iterator<Item = Trait> + 'a {
+    pub fn env_traits(&self, db: &'db dyn HirDatabase) -> impl Iterator<Item = Trait> {
         let _p = tracing::info_span!("env_traits").entered();
         self.autoderef_(db)
             .filter(|ty| matches!(ty.kind(Interner), TyKind::Placeholder(_)))
@@ -5652,10 +5709,7 @@ impl Type {
             .map(Trait::from)
     }
 
-    pub fn as_impl_traits(
-        &self,
-        db: &dyn HirDatabase,
-    ) -> Option<impl Iterator<Item = Trait> + use<>> {
+    pub fn as_impl_traits(&self, db: &'db dyn HirDatabase) -> Option<impl Iterator<Item = Trait>> {
         self.ty.impl_trait_bounds(db).map(|it| {
             it.into_iter().filter_map(|pred| match pred.skip_binders() {
                 hir_ty::WhereClause::Implemented(trait_ref) => {
@@ -5666,33 +5720,33 @@ impl Type {
         })
     }
 
-    pub fn as_associated_type_parent_trait(&self, db: &dyn HirDatabase) -> Option<Trait> {
+    pub fn as_associated_type_parent_trait(&self, db: &'db dyn HirDatabase) -> Option<Trait> {
         self.ty.associated_type_parent_trait(db).map(Into::into)
     }
 
-    fn derived(&self, ty: Ty) -> Type {
-        Type { env: self.env.clone(), ty }
+    fn derived(&self, ty: Ty) -> Self {
+        Type { env: self.env.clone(), ty, _pd: PhantomCovariantLifetime::new() }
     }
 
     /// Visits every type, including generic arguments, in this type. `cb` is called with type
     /// itself first, and then with its generic arguments.
-    pub fn walk(&self, db: &dyn HirDatabase, mut cb: impl FnMut(Type)) {
-        fn walk_substs(
-            db: &dyn HirDatabase,
-            type_: &Type,
+    pub fn walk(&self, db: &'db dyn HirDatabase, mut cb: impl FnMut(Type<'db>)) {
+        fn walk_substs<'db>(
+            db: &'db dyn HirDatabase,
+            type_: &Type<'db>,
             substs: &Substitution,
-            cb: &mut impl FnMut(Type),
+            cb: &mut impl FnMut(Type<'db>),
         ) {
             for ty in substs.iter(Interner).filter_map(|a| a.ty(Interner)) {
                 walk_type(db, &type_.derived(ty.clone()), cb);
             }
         }
 
-        fn walk_bounds(
-            db: &dyn HirDatabase,
-            type_: &Type,
+        fn walk_bounds<'db>(
+            db: &'db dyn HirDatabase,
+            type_: &Type<'db>,
             bounds: &[QuantifiedWhereClause],
-            cb: &mut impl FnMut(Type),
+            cb: &mut impl FnMut(Type<'db>),
         ) {
             for pred in bounds {
                 if let WhereClause::Implemented(trait_ref) = pred.skip_binders() {
@@ -5709,7 +5763,11 @@ impl Type {
             }
         }
 
-        fn walk_type(db: &dyn HirDatabase, type_: &Type, cb: &mut impl FnMut(Type)) {
+        fn walk_type<'db>(
+            db: &'db dyn HirDatabase,
+            type_: &Type<'db>,
+            cb: &mut impl FnMut(Type<'db>),
+        ) {
             let ty = type_.ty.strip_references();
             match ty.kind(Interner) {
                 TyKind::Adt(_, substs) => {
@@ -5777,7 +5835,7 @@ impl Type {
     ///
     /// Note that we consider placeholder types to unify with everything.
     /// For example `Option<T>` and `Option<U>` unify although there is unresolved goal `T = U`.
-    pub fn could_unify_with(&self, db: &dyn HirDatabase, other: &Type) -> bool {
+    pub fn could_unify_with(&self, db: &'db dyn HirDatabase, other: &Type<'db>) -> bool {
         let tys = hir_ty::replace_errors_with_variables(&(self.ty.clone(), other.ty.clone()));
         hir_ty::could_unify(db, self.env.clone(), &tys)
     }
@@ -5786,17 +5844,17 @@ impl Type {
     ///
     /// This means that placeholder types are not considered to unify if there are any bounds set on
     /// them. For example `Option<T>` and `Option<U>` do not unify as we cannot show that `T = U`
-    pub fn could_unify_with_deeply(&self, db: &dyn HirDatabase, other: &Type) -> bool {
+    pub fn could_unify_with_deeply(&self, db: &'db dyn HirDatabase, other: &Type<'db>) -> bool {
         let tys = hir_ty::replace_errors_with_variables(&(self.ty.clone(), other.ty.clone()));
         hir_ty::could_unify_deeply(db, self.env.clone(), &tys)
     }
 
-    pub fn could_coerce_to(&self, db: &dyn HirDatabase, to: &Type) -> bool {
+    pub fn could_coerce_to(&self, db: &'db dyn HirDatabase, to: &Type<'db>) -> bool {
         let tys = hir_ty::replace_errors_with_variables(&(self.ty.clone(), to.ty.clone()));
         hir_ty::could_coerce(db, self.env.clone(), &tys)
     }
 
-    pub fn as_type_param(&self, db: &dyn HirDatabase) -> Option<TypeParam> {
+    pub fn as_type_param(&self, db: &'db dyn HirDatabase) -> Option<TypeParam> {
         match self.ty.kind(Interner) {
             TyKind::Placeholder(p) => Some(TypeParam {
                 id: TypeParamId::from_unchecked(hir_ty::from_placeholder_idx(db, *p)),
@@ -5806,19 +5864,19 @@ impl Type {
     }
 
     /// Returns unique `GenericParam`s contained in this type.
-    pub fn generic_params(&self, db: &dyn HirDatabase) -> FxHashSet<GenericParam> {
+    pub fn generic_params(&self, db: &'db dyn HirDatabase) -> FxHashSet<GenericParam> {
         hir_ty::collect_placeholders(&self.ty, db)
             .into_iter()
             .map(|id| TypeOrConstParam { id }.split(db).either_into())
             .collect()
     }
 
-    pub fn layout(&self, db: &dyn HirDatabase) -> Result<Layout, LayoutError> {
+    pub fn layout(&self, db: &'db dyn HirDatabase) -> Result<Layout, LayoutError> {
         db.layout_of_ty(self.ty.clone(), self.env.clone())
             .map(|layout| Layout(layout, db.target_data_layout(self.env.krate).unwrap()))
     }
 
-    pub fn drop_glue(&self, db: &dyn HirDatabase) -> DropGlue {
+    pub fn drop_glue(&self, db: &'db dyn HirDatabase) -> DropGlue {
         db.has_drop_glue(self.ty.clone(), self.env.clone())
     }
 }
@@ -5845,8 +5903,8 @@ impl InlineAsmOperand {
 
 // FIXME: Document this
 #[derive(Debug)]
-pub struct Callable {
-    ty: Type,
+pub struct Callable<'db> {
+    ty: Type<'db>,
     sig: CallableSig,
     callee: Callee,
     /// Whether this is a method that was called with method call syntax.
@@ -5870,7 +5928,7 @@ pub enum CallableKind {
     FnImpl(FnTrait),
 }
 
-impl Callable {
+impl<'db> Callable<'db> {
     pub fn kind(&self) -> CallableKind {
         match self.callee {
             Callee::Def(CallableDefId::FunctionId(it)) => CallableKind::Function(it.into()),
@@ -5885,7 +5943,7 @@ impl Callable {
             Callee::FnImpl(fn_) => CallableKind::FnImpl(fn_),
         }
     }
-    pub fn receiver_param(&self, db: &dyn HirDatabase) -> Option<(SelfParam, Type)> {
+    pub fn receiver_param(&self, db: &'db dyn HirDatabase) -> Option<(SelfParam, Type<'db>)> {
         let func = match self.callee {
             Callee::Def(CallableDefId::FunctionId(it)) if self.is_bound_method => it,
             _ => return None,
@@ -5896,7 +5954,7 @@ impl Callable {
     pub fn n_params(&self) -> usize {
         self.sig.params().len() - if self.is_bound_method { 1 } else { 0 }
     }
-    pub fn params(&self) -> Vec<Param> {
+    pub fn params(&self) -> Vec<Param<'db>> {
         self.sig
             .params()
             .iter()
@@ -5906,14 +5964,14 @@ impl Callable {
             .map(|(idx, ty)| Param { func: self.callee.clone(), idx, ty })
             .collect()
     }
-    pub fn return_type(&self) -> Type {
+    pub fn return_type(&self) -> Type<'db> {
         self.ty.derived(self.sig.ret().clone())
     }
     pub fn sig(&self) -> &CallableSig {
         &self.sig
     }
 
-    pub fn ty(&self) -> &Type {
+    pub fn ty(&self) -> &Type<'db> {
         &self.ty
     }
 }
@@ -6062,9 +6120,9 @@ impl From<ItemInNs> for ScopeDef {
 }
 
 #[derive(Clone, Debug, PartialEq, Eq)]
-pub struct Adjustment {
-    pub source: Type,
-    pub target: Type,
+pub struct Adjustment<'db> {
+    pub source: Type<'db>,
+    pub target: Type<'db>,
     pub kind: Adjust,
 }
 
@@ -6163,7 +6221,7 @@ impl HasCrate for TypeAlias {
     }
 }
 
-impl HasCrate for Type {
+impl HasCrate for Type<'_> {
     fn krate(&self, _db: &dyn HirDatabase) -> Crate {
         self.env.krate.into()
     }
@@ -6317,9 +6375,9 @@ pub enum DocLinkDef {
     SelfType(Trait),
 }
 
-fn push_ty_diagnostics(
-    db: &dyn HirDatabase,
-    acc: &mut Vec<AnyDiagnostic>,
+fn push_ty_diagnostics<'db>(
+    db: &'db dyn HirDatabase,
+    acc: &mut Vec<AnyDiagnostic<'db>>,
     diagnostics: Option<ThinArc<(), TyLoweringDiagnostic>>,
     source_map: &TypesSourceMap,
 ) {
diff --git a/crates/hir/src/semantics.rs b/crates/hir/src/semantics.rs
index e5df574199f5..3fff3bf0747b 100644
--- a/crates/hir/src/semantics.rs
+++ b/crates/hir/src/semantics.rs
@@ -107,15 +107,15 @@ impl PathResolution {
 }
 
 #[derive(Debug)]
-pub struct TypeInfo {
+pub struct TypeInfo<'db> {
     /// The original type of the expression or pattern.
-    pub original: Type,
+    pub original: Type<'db>,
     /// The adjusted type, if an adjustment happened.
-    pub adjusted: Option<Type>,
+    pub adjusted: Option<Type<'db>>,
 }
 
-impl TypeInfo {
-    pub fn original(self) -> Type {
+impl<'db> TypeInfo<'db> {
+    pub fn original(self) -> Type<'db> {
         self.original
     }
 
@@ -124,7 +124,7 @@ impl TypeInfo {
     }
 
     /// The adjusted type, or the original in case no adjustments occurred.
-    pub fn adjusted(self) -> Type {
+    pub fn adjusted(self) -> Type<'db> {
         self.adjusted.unwrap_or(self.original)
     }
 }
@@ -1347,7 +1347,7 @@ impl<'db> SemanticsImpl<'db> {
         Some(Label { parent, label_id })
     }
 
-    pub fn resolve_type(&self, ty: &ast::Type) -> Option<Type> {
+    pub fn resolve_type(&self, ty: &ast::Type) -> Option<Type<'db>> {
         let analyze = self.analyze(ty.syntax())?;
         let (mut types_map, mut types_source_map) =
             (TypesMap::default(), TypesSourceMap::default());
@@ -1378,7 +1378,7 @@ impl<'db> SemanticsImpl<'db> {
         }
     }
 
-    pub fn expr_adjustments(&self, expr: &ast::Expr) -> Option<Vec<Adjustment>> {
+    pub fn expr_adjustments(&self, expr: &ast::Expr) -> Option<Vec<Adjustment<'db>>> {
         let mutability = |m| match m {
             hir_ty::Mutability::Not => Mutability::Shared,
             hir_ty::Mutability::Mut => Mutability::Mut,
@@ -1421,13 +1421,13 @@ impl<'db> SemanticsImpl<'db> {
         })
     }
 
-    pub fn type_of_expr(&self, expr: &ast::Expr) -> Option<TypeInfo> {
+    pub fn type_of_expr(&self, expr: &ast::Expr) -> Option<TypeInfo<'db>> {
         self.analyze(expr.syntax())?
             .type_of_expr(self.db, expr)
             .map(|(ty, coerced)| TypeInfo { original: ty, adjusted: coerced })
     }
 
-    pub fn type_of_pat(&self, pat: &ast::Pat) -> Option<TypeInfo> {
+    pub fn type_of_pat(&self, pat: &ast::Pat) -> Option<TypeInfo<'db>> {
         self.analyze(pat.syntax())?
             .type_of_pat(self.db, pat)
             .map(|(ty, coerced)| TypeInfo { original: ty, adjusted: coerced })
@@ -1436,15 +1436,15 @@ impl<'db> SemanticsImpl<'db> {
     /// It also includes the changes that binding mode makes in the type. For example in
     /// `let ref x @ Some(_) = None` the result of `type_of_pat` is `Option<T>` but the result
     /// of this function is `&mut Option<T>`
-    pub fn type_of_binding_in_pat(&self, pat: &ast::IdentPat) -> Option<Type> {
+    pub fn type_of_binding_in_pat(&self, pat: &ast::IdentPat) -> Option<Type<'db>> {
         self.analyze(pat.syntax())?.type_of_binding_in_pat(self.db, pat)
     }
 
-    pub fn type_of_self(&self, param: &ast::SelfParam) -> Option<Type> {
+    pub fn type_of_self(&self, param: &ast::SelfParam) -> Option<Type<'db>> {
         self.analyze(param.syntax())?.type_of_self(self.db, param)
     }
 
-    pub fn pattern_adjustments(&self, pat: &ast::Pat) -> SmallVec<[Type; 1]> {
+    pub fn pattern_adjustments(&self, pat: &ast::Pat) -> SmallVec<[Type<'db>; 1]> {
         self.analyze(pat.syntax())
             .and_then(|it| it.pattern_adjustments(self.db, pat))
             .unwrap_or_default()
@@ -1454,7 +1454,7 @@ impl<'db> SemanticsImpl<'db> {
         self.analyze(pat.syntax())?.binding_mode_of_pat(self.db, pat)
     }
 
-    pub fn resolve_expr_as_callable(&self, call: &ast::Expr) -> Option<Callable> {
+    pub fn resolve_expr_as_callable(&self, call: &ast::Expr) -> Option<Callable<'db>> {
         self.analyze(call.syntax())?.resolve_expr_as_callable(self.db, call)
     }
 
@@ -1466,7 +1466,7 @@ impl<'db> SemanticsImpl<'db> {
     pub fn resolve_method_call_fallback(
         &self,
         call: &ast::MethodCallExpr,
-    ) -> Option<(Either<Function, Field>, Option<GenericSubstitution>)> {
+    ) -> Option<(Either<Function, Field>, Option<GenericSubstitution<'db>>)> {
         self.analyze(call.syntax())?.resolve_method_call_fallback(self.db, call)
     }
 
@@ -1474,10 +1474,10 @@ impl<'db> SemanticsImpl<'db> {
     // FIXME: better api for the trait environment
     pub fn resolve_trait_impl_method(
         &self,
-        env: Type,
+        env: Type<'db>,
         trait_: Trait,
         func: Function,
-        subst: impl IntoIterator<Item = Type>,
+        subst: impl IntoIterator<Item = Type<'db>>,
     ) -> Option<Function> {
         let mut substs = hir_ty::TyBuilder::subst_for_def(self.db, TraitId::from(trait_), None);
         for s in subst {
@@ -1516,7 +1516,10 @@ impl<'db> SemanticsImpl<'db> {
 
     // This does not resolve the method call to the correct trait impl!
     // We should probably fix that.
-    pub fn resolve_method_call_as_callable(&self, call: &ast::MethodCallExpr) -> Option<Callable> {
+    pub fn resolve_method_call_as_callable(
+        &self,
+        call: &ast::MethodCallExpr,
+    ) -> Option<Callable<'db>> {
         self.analyze(call.syntax())?.resolve_method_call_as_callable(self.db, call)
     }
 
@@ -1527,14 +1530,15 @@ impl<'db> SemanticsImpl<'db> {
     pub fn resolve_field_fallback(
         &self,
         field: &ast::FieldExpr,
-    ) -> Option<(Either<Either<Field, TupleField>, Function>, Option<GenericSubstitution>)> {
+    ) -> Option<(Either<Either<Field, TupleField>, Function>, Option<GenericSubstitution<'db>>)>
+    {
         self.analyze(field.syntax())?.resolve_field_fallback(self.db, field)
     }
 
     pub fn resolve_record_field(
         &self,
         field: &ast::RecordExprField,
-    ) -> Option<(Field, Option<Local>, Type)> {
+    ) -> Option<(Field, Option<Local>, Type<'db>)> {
         self.resolve_record_field_with_substitution(field)
             .map(|(field, local, ty, _)| (field, local, ty))
     }
@@ -1542,18 +1546,21 @@ impl<'db> SemanticsImpl<'db> {
     pub fn resolve_record_field_with_substitution(
         &self,
         field: &ast::RecordExprField,
-    ) -> Option<(Field, Option<Local>, Type, GenericSubstitution)> {
+    ) -> Option<(Field, Option<Local>, Type<'db>, GenericSubstitution<'db>)> {
         self.analyze(field.syntax())?.resolve_record_field(self.db, field)
     }
 
-    pub fn resolve_record_pat_field(&self, field: &ast::RecordPatField) -> Option<(Field, Type)> {
+    pub fn resolve_record_pat_field(
+        &self,
+        field: &ast::RecordPatField,
+    ) -> Option<(Field, Type<'db>)> {
         self.resolve_record_pat_field_with_subst(field).map(|(field, ty, _)| (field, ty))
     }
 
     pub fn resolve_record_pat_field_with_subst(
         &self,
         field: &ast::RecordPatField,
-    ) -> Option<(Field, Type, GenericSubstitution)> {
+    ) -> Option<(Field, Type<'db>, GenericSubstitution<'db>)> {
         self.analyze(field.syntax())?.resolve_record_pat_field(self.db, field)
     }
 
@@ -1633,7 +1640,7 @@ impl<'db> SemanticsImpl<'db> {
     pub fn resolve_path_with_subst(
         &self,
         path: &ast::Path,
-    ) -> Option<(PathResolution, Option<GenericSubstitution>)> {
+    ) -> Option<(PathResolution, Option<GenericSubstitution<'db>>)> {
         self.analyze(path.syntax())?.resolve_path(self.db, path)
     }
 
@@ -1659,13 +1666,19 @@ impl<'db> SemanticsImpl<'db> {
         self.analyze(pat.syntax())?.resolve_bind_pat_to_const(self.db, pat)
     }
 
-    pub fn record_literal_missing_fields(&self, literal: &ast::RecordExpr) -> Vec<(Field, Type)> {
+    pub fn record_literal_missing_fields(
+        &self,
+        literal: &ast::RecordExpr,
+    ) -> Vec<(Field, Type<'db>)> {
         self.analyze(literal.syntax())
             .and_then(|it| it.record_literal_missing_fields(self.db, literal))
             .unwrap_or_default()
     }
 
-    pub fn record_pattern_missing_fields(&self, pattern: &ast::RecordPat) -> Vec<(Field, Type)> {
+    pub fn record_pattern_missing_fields(
+        &self,
+        pattern: &ast::RecordPat,
+    ) -> Vec<(Field, Type<'db>)> {
         self.analyze(pattern.syntax())
             .and_then(|it| it.record_pattern_missing_fields(self.db, pattern))
             .unwrap_or_default()
diff --git a/crates/hir/src/source_analyzer.rs b/crates/hir/src/source_analyzer.rs
index ba5ceef00a69..58e621a952da 100644
--- a/crates/hir/src/source_analyzer.rs
+++ b/crates/hir/src/source_analyzer.rs
@@ -154,11 +154,11 @@ impl SourceAnalyzer {
         infer.expr_adjustments.get(&expr_id).map(|v| &**v)
     }
 
-    pub(crate) fn type_of_expr(
+    pub(crate) fn type_of_expr<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         expr: &ast::Expr,
-    ) -> Option<(Type, Option<Type>)> {
+    ) -> Option<(Type<'db>, Option<Type<'db>>)> {
         let expr_id = self.expr_id(expr.clone())?;
         let infer = self.infer.as_ref()?;
         let coerced = expr_id
@@ -170,11 +170,11 @@ impl SourceAnalyzer {
         Some((mk_ty(ty), coerced.map(mk_ty)))
     }
 
-    pub(crate) fn type_of_pat(
+    pub(crate) fn type_of_pat<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         pat: &ast::Pat,
-    ) -> Option<(Type, Option<Type>)> {
+    ) -> Option<(Type<'db>, Option<Type<'db>>)> {
         let expr_or_pat_id = self.pat_id(pat)?;
         let infer = self.infer.as_ref()?;
         let coerced = match expr_or_pat_id {
@@ -193,11 +193,11 @@ impl SourceAnalyzer {
         Some((mk_ty(ty), coerced.map(mk_ty)))
     }
 
-    pub(crate) fn type_of_binding_in_pat(
+    pub(crate) fn type_of_binding_in_pat<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         pat: &ast::IdentPat,
-    ) -> Option<Type> {
+    ) -> Option<Type<'db>> {
         let binding_id = self.binding_id_of_pat(pat)?;
         let infer = self.infer.as_ref()?;
         let ty = infer[binding_id].clone();
@@ -205,11 +205,11 @@ impl SourceAnalyzer {
         Some(mk_ty(ty))
     }
 
-    pub(crate) fn type_of_self(
+    pub(crate) fn type_of_self<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         _param: &ast::SelfParam,
-    ) -> Option<Type> {
+    ) -> Option<Type<'db>> {
         let binding = self.body()?.self_param?;
         let ty = self.infer.as_ref()?[binding].clone();
         Some(Type::new_with_resolver(db, &self.resolver, ty))
@@ -230,11 +230,11 @@ impl SourceAnalyzer {
             }
         })
     }
-    pub(crate) fn pattern_adjustments(
+    pub(crate) fn pattern_adjustments<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         pat: &ast::Pat,
-    ) -> Option<SmallVec<[Type; 1]>> {
+    ) -> Option<SmallVec<[Type<'db>; 1]>> {
         let pat_id = self.pat_id(pat)?;
         let infer = self.infer.as_ref()?;
         Some(
@@ -247,11 +247,11 @@ impl SourceAnalyzer {
         )
     }
 
-    pub(crate) fn resolve_method_call_as_callable(
+    pub(crate) fn resolve_method_call_as_callable<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         call: &ast::MethodCallExpr,
-    ) -> Option<Callable> {
+    ) -> Option<Callable<'db>> {
         let expr_id = self.expr_id(call.clone().into())?.as_expr()?;
         let (func, substs) = self.infer.as_ref()?.method_resolution(expr_id)?;
         let ty = db.value_ty(func.into())?.substitute(Interner, &substs);
@@ -272,11 +272,11 @@ impl SourceAnalyzer {
         Some(self.resolve_impl_method_or_trait_def(db, f_in_trait, substs).into())
     }
 
-    pub(crate) fn resolve_method_call_fallback(
+    pub(crate) fn resolve_method_call_fallback<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         call: &ast::MethodCallExpr,
-    ) -> Option<(Either<Function, Field>, Option<GenericSubstitution>)> {
+    ) -> Option<(Either<Function, Field>, Option<GenericSubstitution<'db>>)> {
         let expr_id = self.expr_id(call.clone().into())?.as_expr()?;
         let inference_result = self.infer.as_ref()?;
         match inference_result.method_resolution(expr_id) {
@@ -296,11 +296,11 @@ impl SourceAnalyzer {
         }
     }
 
-    pub(crate) fn resolve_expr_as_callable(
+    pub(crate) fn resolve_expr_as_callable<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         call: &ast::Expr,
-    ) -> Option<Callable> {
+    ) -> Option<Callable<'db>> {
         let (orig, adjusted) = self.type_of_expr(db, &call.clone())?;
         adjusted.unwrap_or(orig).as_callable(db)
     }
@@ -316,12 +316,12 @@ impl SourceAnalyzer {
         })
     }
 
-    fn field_subst(
+    fn field_subst<'db>(
         &self,
         field_expr: ExprId,
         infer: &InferenceResult,
-        db: &dyn HirDatabase,
-    ) -> Option<GenericSubstitution> {
+        db: &'db dyn HirDatabase,
+    ) -> Option<GenericSubstitution<'db>> {
         let body = self.body()?;
         if let Expr::Field { expr: object_expr, name: _ } = body[field_expr] {
             let (adt, subst) = type_of_expr_including_adjust(infer, object_expr)?.as_adt()?;
@@ -334,11 +334,12 @@ impl SourceAnalyzer {
         None
     }
 
-    pub(crate) fn resolve_field_fallback(
+    pub(crate) fn resolve_field_fallback<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         field: &ast::FieldExpr,
-    ) -> Option<(Either<Either<Field, TupleField>, Function>, Option<GenericSubstitution>)> {
+    ) -> Option<(Either<Either<Field, TupleField>, Function>, Option<GenericSubstitution<'db>>)>
+    {
         let &(def, ..) = self.def.as_ref()?;
         let expr_id = self.expr_id(field.clone().into())?.as_expr()?;
         let inference_result = self.infer.as_ref()?;
@@ -562,11 +563,11 @@ impl SourceAnalyzer {
         Some(self.resolve_impl_method_or_trait_def(db, op_fn, substs))
     }
 
-    pub(crate) fn resolve_record_field(
+    pub(crate) fn resolve_record_field<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         field: &ast::RecordExprField,
-    ) -> Option<(Field, Option<Local>, Type, GenericSubstitution)> {
+    ) -> Option<(Field, Option<Local>, Type<'db>, GenericSubstitution<'db>)> {
         let record_expr = ast::RecordExpr::cast(field.syntax().parent().and_then(|p| p.parent())?)?;
         let expr = ast::Expr::from(record_expr);
         let expr_id = self.body_source_map()?.node_expr(InFile::new(self.file_id, &expr))?;
@@ -606,11 +607,11 @@ impl SourceAnalyzer {
         ))
     }
 
-    pub(crate) fn resolve_record_pat_field(
+    pub(crate) fn resolve_record_pat_field<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         field: &ast::RecordPatField,
-    ) -> Option<(Field, Type, GenericSubstitution)> {
+    ) -> Option<(Field, Type<'db>, GenericSubstitution<'db>)> {
         let field_name = field.field_name()?.as_name();
         let record_pat = ast::RecordPat::cast(field.syntax().parent().and_then(|p| p.parent())?)?;
         let pat_id = self.pat_id(&record_pat.into())?;
@@ -676,11 +677,11 @@ impl SourceAnalyzer {
             .map(crate::TypeParam::from)
     }
 
-    pub(crate) fn resolve_path(
+    pub(crate) fn resolve_path<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         path: &ast::Path,
-    ) -> Option<(PathResolution, Option<GenericSubstitution>)> {
+    ) -> Option<(PathResolution, Option<GenericSubstitution<'db>>)> {
         let parent = path.syntax().parent();
         let parent = || parent.clone();
 
@@ -1023,11 +1024,11 @@ impl SourceAnalyzer {
         }
     }
 
-    pub(crate) fn record_literal_missing_fields(
+    pub(crate) fn record_literal_missing_fields<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         literal: &ast::RecordExpr,
-    ) -> Option<Vec<(Field, Type)>> {
+    ) -> Option<Vec<(Field, Type<'db>)>> {
         let body = self.body()?;
         let infer = self.infer.as_ref()?;
 
@@ -1046,11 +1047,11 @@ impl SourceAnalyzer {
         Some(res)
     }
 
-    pub(crate) fn record_pattern_missing_fields(
+    pub(crate) fn record_pattern_missing_fields<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         pattern: &ast::RecordPat,
-    ) -> Option<Vec<(Field, Type)>> {
+    ) -> Option<Vec<(Field, Type<'db>)>> {
         let body = self.body()?;
         let infer = self.infer.as_ref()?;
 
@@ -1063,13 +1064,13 @@ impl SourceAnalyzer {
         Some(res)
     }
 
-    fn missing_fields(
+    fn missing_fields<'db>(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         substs: &Substitution,
         variant: VariantId,
         missing_fields: Vec<LocalFieldId>,
-    ) -> Vec<(Field, Type)> {
+    ) -> Vec<(Field, Type<'db>)> {
         let field_types = db.field_types(variant);
 
         missing_fields
diff --git a/crates/hir/src/term_search.rs b/crates/hir/src/term_search.rs
index af72179305c8..4b354e640628 100644
--- a/crates/hir/src/term_search.rs
+++ b/crates/hir/src/term_search.rs
@@ -22,20 +22,20 @@ enum NewTypesKey {
 /// Helper enum to squash big number of alternative trees into `Many` variant as there is too many
 /// to take into account.
 #[derive(Debug)]
-enum AlternativeExprs {
+enum AlternativeExprs<'db> {
     /// There are few trees, so we keep track of them all
-    Few(FxHashSet<Expr>),
+    Few(FxHashSet<Expr<'db>>),
     /// There are too many trees to keep track of
     Many,
 }
 
-impl AlternativeExprs {
+impl<'db> AlternativeExprs<'db> {
     /// Construct alternative trees
     ///
     /// # Arguments
     /// `threshold` - threshold value for many trees (more than that is many)
     /// `exprs` - expressions iterator
-    fn new(threshold: usize, exprs: impl Iterator<Item = Expr>) -> AlternativeExprs {
+    fn new(threshold: usize, exprs: impl Iterator<Item = Expr<'db>>) -> AlternativeExprs<'db> {
         let mut it = AlternativeExprs::Few(Default::default());
         it.extend_with_threshold(threshold, exprs);
         it
@@ -45,7 +45,7 @@ impl AlternativeExprs {
     ///
     /// # Arguments
     /// `ty` - Type of expressions queried (this is used to give type to `Expr::Many`)
-    fn exprs(&self, ty: &Type) -> Vec<Expr> {
+    fn exprs(&self, ty: &Type<'db>) -> Vec<Expr<'db>> {
         match self {
             AlternativeExprs::Few(exprs) => exprs.iter().cloned().collect(),
             AlternativeExprs::Many => vec![Expr::Many(ty.clone())],
@@ -57,7 +57,7 @@ impl AlternativeExprs {
     /// # Arguments
     /// `threshold` - threshold value for many trees (more than that is many)
     /// `exprs` - expressions iterator
-    fn extend_with_threshold(&mut self, threshold: usize, exprs: impl Iterator<Item = Expr>) {
+    fn extend_with_threshold(&mut self, threshold: usize, exprs: impl Iterator<Item = Expr<'db>>) {
         match self {
             AlternativeExprs::Few(tts) => {
                 for it in exprs {
@@ -88,20 +88,20 @@ impl AlternativeExprs {
 /// Both of them are to speed up the term search by leaving out types / ScopeDefs that likely do
 /// not produce any new results.
 #[derive(Default, Debug)]
-struct LookupTable {
+struct LookupTable<'db> {
     /// All the `Expr`s in "value" produce the type of "key"
-    data: FxHashMap<Type, AlternativeExprs>,
+    data: FxHashMap<Type<'db>, AlternativeExprs<'db>>,
     /// New types reached since last query by the `NewTypesKey`
-    new_types: FxHashMap<NewTypesKey, Vec<Type>>,
+    new_types: FxHashMap<NewTypesKey, Vec<Type<'db>>>,
     /// Types queried but not present
-    types_wishlist: FxHashSet<Type>,
+    types_wishlist: FxHashSet<Type<'db>>,
     /// Threshold to squash trees to `Many`
     many_threshold: usize,
 }
 
-impl LookupTable {
+impl<'db> LookupTable<'db> {
     /// Initialize lookup table
-    fn new(many_threshold: usize, goal: Type) -> Self {
+    fn new(many_threshold: usize, goal: Type<'db>) -> Self {
         let mut res = Self { many_threshold, ..Default::default() };
         res.new_types.insert(NewTypesKey::ImplMethod, Vec::new());
         res.new_types.insert(NewTypesKey::StructProjection, Vec::new());
@@ -110,7 +110,7 @@ impl LookupTable {
     }
 
     /// Find all `Expr`s that unify with the `ty`
-    fn find(&mut self, db: &dyn HirDatabase, ty: &Type) -> Option<Vec<Expr>> {
+    fn find(&mut self, db: &'db dyn HirDatabase, ty: &Type<'db>) -> Option<Vec<Expr<'db>>> {
         let res = self
             .data
             .iter()
@@ -135,7 +135,7 @@ impl LookupTable {
     ///
     /// For example if we have type `i32` in data and we query for `&i32` it map all the type
     /// trees we have for `i32` with `Expr::Reference` and returns them.
-    fn find_autoref(&mut self, db: &dyn HirDatabase, ty: &Type) -> Option<Vec<Expr>> {
+    fn find_autoref(&mut self, db: &'db dyn HirDatabase, ty: &Type<'db>) -> Option<Vec<Expr<'db>>> {
         let res = self
             .data
             .iter()
@@ -174,7 +174,7 @@ impl LookupTable {
     /// Note that the types have to be the same, unification is not enough as unification is not
     /// transitive. For example Vec<i32> and FxHashSet<i32> both unify with Iterator<Item = i32>,
     /// but they clearly do not unify themselves.
-    fn insert(&mut self, ty: Type, exprs: impl Iterator<Item = Expr>) {
+    fn insert(&mut self, ty: Type<'db>, exprs: impl Iterator<Item = Expr<'db>>) {
         match self.data.get_mut(&ty) {
             Some(it) => {
                 it.extend_with_threshold(self.many_threshold, exprs);
@@ -192,14 +192,14 @@ impl LookupTable {
     }
 
     /// Iterate all the reachable types
-    fn iter_types(&self) -> impl Iterator<Item = Type> + '_ {
+    fn iter_types(&self) -> impl Iterator<Item = Type<'db>> + '_ {
         self.data.keys().cloned()
     }
 
     /// Query new types reached since last query by key
     ///
     /// Create new key if you wish to query it to avoid conflicting with existing queries.
-    fn new_types(&mut self, key: NewTypesKey) -> Vec<Type> {
+    fn new_types(&mut self, key: NewTypesKey) -> Vec<Type<'db>> {
         match self.new_types.get_mut(&key) {
             Some(it) => std::mem::take(it),
             None => Vec::new(),
@@ -207,20 +207,20 @@ impl LookupTable {
     }
 
     /// Types queried but not found
-    fn types_wishlist(&mut self) -> &FxHashSet<Type> {
+    fn types_wishlist(&mut self) -> &FxHashSet<Type<'db>> {
         &self.types_wishlist
     }
 }
 
 /// Context for the `term_search` function
 #[derive(Debug)]
-pub struct TermSearchCtx<'a, DB: HirDatabase> {
+pub struct TermSearchCtx<'db, DB: HirDatabase> {
     /// Semantics for the program
-    pub sema: &'a Semantics<'a, DB>,
+    pub sema: &'db Semantics<'db, DB>,
     /// Semantic scope, captures context for the term search
-    pub scope: &'a SemanticsScope<'a>,
+    pub scope: &'db SemanticsScope<'db>,
     /// Target / expected output type
-    pub goal: Type,
+    pub goal: Type<'db>,
     /// Configuration for term search
     pub config: TermSearchConfig,
 }
@@ -263,7 +263,7 @@ impl Default for TermSearchConfig {
 /// Note that there are usually more ways we can get to the `goal` type but some are discarded to
 /// reduce the memory consumption. It is also unlikely anyone is willing ti browse through
 /// thousands of possible responses so we currently take first 10 from every tactic.
-pub fn term_search<DB: HirDatabase>(ctx: &TermSearchCtx<'_, DB>) -> Vec<Expr> {
+pub fn term_search<'db, DB: HirDatabase>(ctx: &'db TermSearchCtx<'db, DB>) -> Vec<Expr<'db>> {
     let module = ctx.scope.module();
     let mut defs = FxHashSet::default();
     defs.insert(ScopeDef::ModuleDef(ModuleDef::Module(module)));
@@ -285,7 +285,7 @@ pub fn term_search<DB: HirDatabase>(ctx: &TermSearchCtx<'_, DB>) -> Vec<Expr> {
     };
 
     // Try trivial tactic first, also populates lookup table
-    let mut solutions: Vec<Expr> = tactics::trivial(ctx, &defs, &mut lookup).collect();
+    let mut solutions: Vec<Expr<'db>> = tactics::trivial(ctx, &defs, &mut lookup).collect();
     // Use well known types tactic before iterations as it does not depend on other tactics
     solutions.extend(tactics::famous_types(ctx, &defs, &mut lookup));
     solutions.extend(tactics::assoc_const(ctx, &defs, &mut lookup));
diff --git a/crates/hir/src/term_search/expr.rs b/crates/hir/src/term_search/expr.rs
index 0d672dc332f3..c648f704b6f1 100644
--- a/crates/hir/src/term_search/expr.rs
+++ b/crates/hir/src/term_search/expr.rs
@@ -59,7 +59,7 @@ fn mod_item_path_str(
 /// So in short it pretty much gives us a way to get type `Option<i32>` using the items we have in
 /// scope.
 #[derive(Debug, Clone, Eq, Hash, PartialEq)]
-pub enum Expr {
+pub enum Expr<'db> {
     /// Constant
     Const(Const),
     /// Static variable
@@ -69,26 +69,31 @@ pub enum Expr {
     /// Constant generic parameter
     ConstParam(ConstParam),
     /// Well known type (such as `true` for bool)
-    FamousType { ty: Type, value: &'static str },
+    FamousType { ty: Type<'db>, value: &'static str },
     /// Function call (does not take self param)
-    Function { func: Function, generics: Vec<Type>, params: Vec<Expr> },
+    Function { func: Function, generics: Vec<Type<'db>>, params: Vec<Expr<'db>> },
     /// Method call (has self param)
-    Method { func: Function, generics: Vec<Type>, target: Box<Expr>, params: Vec<Expr> },
+    Method {
+        func: Function,
+        generics: Vec<Type<'db>>,
+        target: Box<Expr<'db>>,
+        params: Vec<Expr<'db>>,
+    },
     /// Enum variant construction
-    Variant { variant: Variant, generics: Vec<Type>, params: Vec<Expr> },
+    Variant { variant: Variant, generics: Vec<Type<'db>>, params: Vec<Expr<'db>> },
     /// Struct construction
-    Struct { strukt: Struct, generics: Vec<Type>, params: Vec<Expr> },
+    Struct { strukt: Struct, generics: Vec<Type<'db>>, params: Vec<Expr<'db>> },
     /// Tuple construction
-    Tuple { ty: Type, params: Vec<Expr> },
+    Tuple { ty: Type<'db>, params: Vec<Expr<'db>> },
     /// Struct field access
-    Field { expr: Box<Expr>, field: Field },
+    Field { expr: Box<Expr<'db>>, field: Field },
     /// Passing type as reference (with `&`)
-    Reference(Box<Expr>),
+    Reference(Box<Expr<'db>>),
     /// Indicates possibility of many different options that all evaluate to `ty`
-    Many(Type),
+    Many(Type<'db>),
 }
 
-impl Expr {
+impl<'db> Expr<'db> {
     /// Generate source code for type tree.
     ///
     /// Note that trait imports are not added to generated code.
@@ -96,8 +101,8 @@ impl Expr {
     /// by `traits_used` method are also imported.
     pub fn gen_source_code(
         &self,
-        sema_scope: &SemanticsScope<'_>,
-        many_formatter: &mut dyn FnMut(&Type) -> String,
+        sema_scope: &SemanticsScope<'db>,
+        many_formatter: &mut dyn FnMut(&Type<'db>) -> String,
         cfg: ImportPathConfig,
         display_target: DisplayTarget,
     ) -> Result<String, DisplaySourceCodeError> {
@@ -298,7 +303,7 @@ impl Expr {
     /// Get type of the type tree.
     ///
     /// Same as getting the type of root node
-    pub fn ty(&self, db: &dyn HirDatabase) -> Type {
+    pub fn ty(&self, db: &'db dyn HirDatabase) -> Type<'db> {
         match self {
             Expr::Const(it) => it.ty(db),
             Expr::Static(it) => it.ty(db),
diff --git a/crates/hir/src/term_search/tactics.rs b/crates/hir/src/term_search/tactics.rs
index bcff44fcd016..9df131f90e40 100644
--- a/crates/hir/src/term_search/tactics.rs
+++ b/crates/hir/src/term_search/tactics.rs
@@ -40,11 +40,11 @@ use super::{LookupTable, NewTypesKey, TermSearchCtx};
 ///
 /// _Note that there is no use of calling this tactic in every iteration as the output does not
 /// depend on the current state of `lookup`_
-pub(super) fn trivial<'a, DB: HirDatabase>(
-    ctx: &'a TermSearchCtx<'a, DB>,
+pub(super) fn trivial<'a, 'lt, 'db, DB: HirDatabase>(
+    ctx: &'a TermSearchCtx<'db, DB>,
     defs: &'a FxHashSet<ScopeDef>,
-    lookup: &'a mut LookupTable,
-) -> impl Iterator<Item = Expr> + 'a {
+    lookup: &'lt mut LookupTable<'db>,
+) -> impl Iterator<Item = Expr<'db>> + use<'a, 'db, 'lt, DB> {
     let db = ctx.sema.db;
     defs.iter().filter_map(|def| {
         let expr = match def {
@@ -104,11 +104,11 @@ pub(super) fn trivial<'a, DB: HirDatabase>(
 ///
 /// _Note that there is no use of calling this tactic in every iteration as the output does not
 /// depend on the current state of `lookup`_
-pub(super) fn assoc_const<'a, DB: HirDatabase>(
-    ctx: &'a TermSearchCtx<'a, DB>,
+pub(super) fn assoc_const<'a, 'lt, 'db, DB: HirDatabase>(
+    ctx: &'a TermSearchCtx<'db, DB>,
     defs: &'a FxHashSet<ScopeDef>,
-    lookup: &'a mut LookupTable,
-) -> impl Iterator<Item = Expr> + 'a {
+    lookup: &'lt mut LookupTable<'db>,
+) -> impl Iterator<Item = Expr<'db>> + use<'a, 'db, 'lt, DB> {
     let db = ctx.sema.db;
     let module = ctx.scope.module();
 
@@ -152,12 +152,12 @@ pub(super) fn assoc_const<'a, DB: HirDatabase>(
 /// * `defs` - Set of items in scope at term search target location
 /// * `lookup` - Lookup table for types
 /// * `should_continue` - Function that indicates when to stop iterating
-pub(super) fn data_constructor<'a, DB: HirDatabase>(
-    ctx: &'a TermSearchCtx<'a, DB>,
+pub(super) fn data_constructor<'a, 'lt, 'db, DB: HirDatabase>(
+    ctx: &'a TermSearchCtx<'db, DB>,
     _defs: &'a FxHashSet<ScopeDef>,
-    lookup: &'a mut LookupTable,
+    lookup: &'lt mut LookupTable<'db>,
     should_continue: &'a dyn std::ops::Fn() -> bool,
-) -> impl Iterator<Item = Expr> + 'a {
+) -> impl Iterator<Item = Expr<'db>> + use<'a, 'db, 'lt, DB> {
     let db = ctx.sema.db;
     let module = ctx.scope.module();
     lookup
@@ -199,14 +199,14 @@ pub(super) fn data_constructor<'a, DB: HirDatabase>(
                 let generics: Vec<_> = ty.type_arguments().collect();
 
                 // Early exit if some param cannot be filled from lookup
-                let param_exprs: Vec<Vec<Expr>> = fields
+                let param_exprs: Vec<Vec<Expr<'_>>> = fields
                     .into_iter()
                     .map(|field| lookup.find(db, &field.ty_with_args(db, generics.iter().cloned())))
                     .collect::<Option<_>>()?;
 
                 // Note that we need special case for 0 param constructors because of multi cartesian
                 // product
-                let exprs: Vec<Expr> = if param_exprs.is_empty() {
+                let exprs: Vec<Expr<'_>> = if param_exprs.is_empty() {
                     vec![Expr::Struct { strukt, generics, params: Vec::new() }]
                 } else {
                     param_exprs
@@ -247,7 +247,7 @@ pub(super) fn data_constructor<'a, DB: HirDatabase>(
                     .into_iter()
                     .filter_map(|variant| {
                         // Early exit if some param cannot be filled from lookup
-                        let param_exprs: Vec<Vec<Expr>> = variant
+                        let param_exprs: Vec<Vec<Expr<'_>>> = variant
                             .fields(db)
                             .into_iter()
                             .map(|field| {
@@ -257,7 +257,7 @@ pub(super) fn data_constructor<'a, DB: HirDatabase>(
 
                         // Note that we need special case for 0 param constructors because of multi cartesian
                         // product
-                        let variant_exprs: Vec<Expr> = if param_exprs.is_empty() {
+                        let variant_exprs: Vec<Expr<'_>> = if param_exprs.is_empty() {
                             vec![Expr::Variant {
                                 variant,
                                 generics: generics.clone(),
@@ -301,12 +301,12 @@ pub(super) fn data_constructor<'a, DB: HirDatabase>(
 /// * `defs` - Set of items in scope at term search target location
 /// * `lookup` - Lookup table for types
 /// * `should_continue` - Function that indicates when to stop iterating
-pub(super) fn free_function<'a, DB: HirDatabase>(
-    ctx: &'a TermSearchCtx<'a, DB>,
+pub(super) fn free_function<'a, 'lt, 'db, DB: HirDatabase>(
+    ctx: &'a TermSearchCtx<'db, DB>,
     defs: &'a FxHashSet<ScopeDef>,
-    lookup: &'a mut LookupTable,
+    lookup: &'lt mut LookupTable<'db>,
     should_continue: &'a dyn std::ops::Fn() -> bool,
-) -> impl Iterator<Item = Expr> + 'a {
+) -> impl Iterator<Item = Expr<'db>> + use<'a, 'db, 'lt, DB> {
     let db = ctx.sema.db;
     let module = ctx.scope.module();
     defs.iter()
@@ -375,7 +375,7 @@ pub(super) fn free_function<'a, DB: HirDatabase>(
                         }
 
                         // Early exit if some param cannot be filled from lookup
-                        let param_exprs: Vec<Vec<Expr>> = it
+                        let param_exprs: Vec<Vec<Expr<'_>>> = it
                             .params_without_self_with_args(db, generics.iter().cloned())
                             .into_iter()
                             .map(|field| {
@@ -389,7 +389,7 @@ pub(super) fn free_function<'a, DB: HirDatabase>(
 
                         // Note that we need special case for 0 param constructors because of multi cartesian
                         // product
-                        let fn_exprs: Vec<Expr> = if param_exprs.is_empty() {
+                        let fn_exprs: Vec<Expr<'_>> = if param_exprs.is_empty() {
                             vec![Expr::Function { func: *it, generics, params: Vec::new() }]
                         } else {
                             param_exprs
@@ -432,12 +432,12 @@ pub(super) fn free_function<'a, DB: HirDatabase>(
 /// * `defs` - Set of items in scope at term search target location
 /// * `lookup` - Lookup table for types
 /// * `should_continue` - Function that indicates when to stop iterating
-pub(super) fn impl_method<'a, DB: HirDatabase>(
-    ctx: &'a TermSearchCtx<'a, DB>,
+pub(super) fn impl_method<'a, 'lt, 'db, DB: HirDatabase>(
+    ctx: &'a TermSearchCtx<'db, DB>,
     _defs: &'a FxHashSet<ScopeDef>,
-    lookup: &'a mut LookupTable,
+    lookup: &'lt mut LookupTable<'db>,
     should_continue: &'a dyn std::ops::Fn() -> bool,
-) -> impl Iterator<Item = Expr> + 'a {
+) -> impl Iterator<Item = Expr<'db>> + use<'a, 'db, 'lt, DB> {
     let db = ctx.sema.db;
     let module = ctx.scope.module();
     lookup
@@ -507,14 +507,14 @@ pub(super) fn impl_method<'a, DB: HirDatabase>(
             let target_type_exprs = lookup.find(db, &ty).expect("Type not in lookup");
 
             // Early exit if some param cannot be filled from lookup
-            let param_exprs: Vec<Vec<Expr>> = it
+            let param_exprs: Vec<Vec<Expr<'_>>> = it
                 .params_without_self_with_args(db, ty.type_arguments())
                 .into_iter()
                 .map(|field| lookup.find_autoref(db, field.ty()))
                 .collect::<Option<_>>()?;
 
             let generics: Vec<_> = ty.type_arguments().collect();
-            let fn_exprs: Vec<Expr> = std::iter::once(target_type_exprs)
+            let fn_exprs: Vec<Expr<'_>> = std::iter::once(target_type_exprs)
                 .chain(param_exprs)
                 .multi_cartesian_product()
                 .map(|params| {
@@ -547,12 +547,12 @@ pub(super) fn impl_method<'a, DB: HirDatabase>(
 /// * `defs` - Set of items in scope at term search target location
 /// * `lookup` - Lookup table for types
 /// * `should_continue` - Function that indicates when to stop iterating
-pub(super) fn struct_projection<'a, DB: HirDatabase>(
-    ctx: &'a TermSearchCtx<'a, DB>,
+pub(super) fn struct_projection<'a, 'lt, 'db, DB: HirDatabase>(
+    ctx: &'a TermSearchCtx<'db, DB>,
     _defs: &'a FxHashSet<ScopeDef>,
-    lookup: &'a mut LookupTable,
+    lookup: &'lt mut LookupTable<'db>,
     should_continue: &'a dyn std::ops::Fn() -> bool,
-) -> impl Iterator<Item = Expr> + 'a {
+) -> impl Iterator<Item = Expr<'db>> + use<'a, 'db, 'lt, DB> {
     let db = ctx.sema.db;
     let module = ctx.scope.module();
     lookup
@@ -589,11 +589,11 @@ pub(super) fn struct_projection<'a, DB: HirDatabase>(
 /// * `ctx` - Context for the term search
 /// * `defs` - Set of items in scope at term search target location
 /// * `lookup` - Lookup table for types
-pub(super) fn famous_types<'a, DB: HirDatabase>(
-    ctx: &'a TermSearchCtx<'a, DB>,
+pub(super) fn famous_types<'a, 'lt, 'db, DB: HirDatabase>(
+    ctx: &'a TermSearchCtx<'db, DB>,
     _defs: &'a FxHashSet<ScopeDef>,
-    lookup: &'a mut LookupTable,
-) -> impl Iterator<Item = Expr> + 'a {
+    lookup: &'lt mut LookupTable<'db>,
+) -> impl Iterator<Item = Expr<'db>> + use<'a, 'db, 'lt, DB> {
     let db = ctx.sema.db;
     let module = ctx.scope.module();
     [
@@ -620,12 +620,12 @@ pub(super) fn famous_types<'a, DB: HirDatabase>(
 /// * `defs` - Set of items in scope at term search target location
 /// * `lookup` - Lookup table for types
 /// * `should_continue` - Function that indicates when to stop iterating
-pub(super) fn impl_static_method<'a, DB: HirDatabase>(
-    ctx: &'a TermSearchCtx<'a, DB>,
+pub(super) fn impl_static_method<'a, 'lt, 'db, DB: HirDatabase>(
+    ctx: &'a TermSearchCtx<'db, DB>,
     _defs: &'a FxHashSet<ScopeDef>,
-    lookup: &'a mut LookupTable,
+    lookup: &'lt mut LookupTable<'db>,
     should_continue: &'a dyn std::ops::Fn() -> bool,
-) -> impl Iterator<Item = Expr> + 'a {
+) -> impl Iterator<Item = Expr<'db>> + use<'a, 'db, 'lt, DB> {
     let db = ctx.sema.db;
     let module = ctx.scope.module();
     lookup
@@ -683,7 +683,7 @@ pub(super) fn impl_static_method<'a, DB: HirDatabase>(
             }
 
             // Early exit if some param cannot be filled from lookup
-            let param_exprs: Vec<Vec<Expr>> = it
+            let param_exprs: Vec<Vec<Expr<'_>>> = it
                 .params_without_self_with_args(db, ty.type_arguments())
                 .into_iter()
                 .map(|field| lookup.find_autoref(db, field.ty()))
@@ -692,7 +692,7 @@ pub(super) fn impl_static_method<'a, DB: HirDatabase>(
             // Note that we need special case for 0 param constructors because of multi cartesian
             // product
             let generics = ty.type_arguments().collect();
-            let fn_exprs: Vec<Expr> = if param_exprs.is_empty() {
+            let fn_exprs: Vec<Expr<'_>> = if param_exprs.is_empty() {
                 vec![Expr::Function { func: it, generics, params: Vec::new() }]
             } else {
                 param_exprs
@@ -722,12 +722,12 @@ pub(super) fn impl_static_method<'a, DB: HirDatabase>(
 /// * `defs` - Set of items in scope at term search target location
 /// * `lookup` - Lookup table for types
 /// * `should_continue` - Function that indicates when to stop iterating
-pub(super) fn make_tuple<'a, DB: HirDatabase>(
-    ctx: &'a TermSearchCtx<'a, DB>,
+pub(super) fn make_tuple<'a, 'lt, 'db, DB: HirDatabase>(
+    ctx: &'a TermSearchCtx<'db, DB>,
     _defs: &'a FxHashSet<ScopeDef>,
-    lookup: &'a mut LookupTable,
+    lookup: &'lt mut LookupTable<'db>,
     should_continue: &'a dyn std::ops::Fn() -> bool,
-) -> impl Iterator<Item = Expr> + 'a {
+) -> impl Iterator<Item = Expr<'db>> + use<'a, 'db, 'lt, DB> {
     let db = ctx.sema.db;
     let module = ctx.scope.module();
 
@@ -749,15 +749,15 @@ pub(super) fn make_tuple<'a, DB: HirDatabase>(
             }
 
             // Early exit if some param cannot be filled from lookup
-            let param_exprs: Vec<Vec<Expr>> =
+            let param_exprs: Vec<Vec<Expr<'db>>> =
                 ty.type_arguments().map(|field| lookup.find(db, &field)).collect::<Option<_>>()?;
 
-            let exprs: Vec<Expr> = param_exprs
+            let exprs: Vec<Expr<'db>> = param_exprs
                 .into_iter()
                 .multi_cartesian_product()
                 .filter(|_| should_continue())
                 .map(|params| {
-                    let tys: Vec<Type> = params.iter().map(|it| it.ty(db)).collect();
+                    let tys: Vec<Type<'_>> = params.iter().map(|it| it.ty(db)).collect();
                     let tuple_ty = Type::new_tuple(module.krate().into(), &tys);
 
                     let expr = Expr::Tuple { ty: tuple_ty.clone(), params };
diff --git a/crates/ide-assists/src/assist_context.rs b/crates/ide-assists/src/assist_context.rs
index afb2229d3e2f..23feb055915d 100644
--- a/crates/ide-assists/src/assist_context.rs
+++ b/crates/ide-assists/src/assist_context.rs
@@ -100,7 +100,7 @@ impl<'a> AssistContext<'a> {
         }
     }
 
-    pub(crate) fn db(&self) -> &RootDatabase {
+    pub(crate) fn db(&self) -> &'a RootDatabase {
         self.sema.db
     }
 
diff --git a/crates/ide-assists/src/handlers/add_missing_impl_members.rs b/crates/ide-assists/src/handlers/add_missing_impl_members.rs
index 65bd9141bd23..9e4a9d3827b3 100644
--- a/crates/ide-assists/src/handlers/add_missing_impl_members.rs
+++ b/crates/ide-assists/src/handlers/add_missing_impl_members.rs
@@ -191,7 +191,7 @@ fn add_missing_impl_members_inner(
 fn try_gen_trait_body(
     ctx: &AssistContext<'_>,
     func: &ast::Fn,
-    trait_ref: hir::TraitRef,
+    trait_ref: hir::TraitRef<'_>,
     impl_def: &ast::Impl,
     edition: Edition,
 ) -> Option<()> {
diff --git a/crates/ide-assists/src/handlers/auto_import.rs b/crates/ide-assists/src/handlers/auto_import.rs
index 2c7532d919ad..cb01261cd9c7 100644
--- a/crates/ide-assists/src/handlers/auto_import.rs
+++ b/crates/ide-assists/src/handlers/auto_import.rs
@@ -178,9 +178,9 @@ pub(crate) fn auto_import(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<
     Some(())
 }
 
-pub(super) fn find_importable_node(
-    ctx: &AssistContext<'_>,
-) -> Option<(ImportAssets, SyntaxElement)> {
+pub(super) fn find_importable_node<'db>(
+    ctx: &AssistContext<'db>,
+) -> Option<(ImportAssets<'db>, SyntaxElement)> {
     if let Some(path_under_caret) = ctx.find_node_at_offset_with_descend::<ast::Path>() {
         ImportAssets::for_exact_path(&path_under_caret, &ctx.sema)
             .zip(Some(path_under_caret.syntax().clone().into()))
@@ -201,7 +201,7 @@ pub(super) fn find_importable_node(
     }
 }
 
-fn group_label(import_candidate: &ImportCandidate) -> GroupLabel {
+fn group_label(import_candidate: &ImportCandidate<'_>) -> GroupLabel {
     let name = match import_candidate {
         ImportCandidate::Path(candidate) => format!("Import {}", candidate.name.text()),
         ImportCandidate::TraitAssocItem(candidate) => {
diff --git a/crates/ide-assists/src/handlers/extract_function.rs b/crates/ide-assists/src/handlers/extract_function.rs
index 5a6a7ede3526..c9f557c90c57 100644
--- a/crates/ide-assists/src/handlers/extract_function.rs
+++ b/crates/ide-assists/src/handlers/extract_function.rs
@@ -317,23 +317,23 @@ fn extraction_target(node: &SyntaxNode, selection_range: TextRange) -> Option<Fu
 }
 
 #[derive(Debug)]
-struct Function {
+struct Function<'db> {
     name: ast::NameRef,
     self_param: Option<ast::SelfParam>,
-    params: Vec<Param>,
-    control_flow: ControlFlow,
-    ret_ty: RetType,
+    params: Vec<Param<'db>>,
+    control_flow: ControlFlow<'db>,
+    ret_ty: RetType<'db>,
     body: FunctionBody,
     outliving_locals: Vec<OutlivedLocal>,
     /// Whether at least one of the container's tail expr is contained in the range we're extracting.
     contains_tail_expr: bool,
-    mods: ContainerInfo,
+    mods: ContainerInfo<'db>,
 }
 
 #[derive(Debug)]
-struct Param {
+struct Param<'db> {
     var: Local,
-    ty: hir::Type,
+    ty: hir::Type<'db>,
     move_local: bool,
     requires_mut: bool,
     is_copy: bool,
@@ -348,10 +348,10 @@ enum ParamKind {
 }
 
 #[derive(Debug)]
-enum FunType {
+enum FunType<'db> {
     Unit,
-    Single(hir::Type),
-    Tuple(Vec<hir::Type>),
+    Single(hir::Type<'db>),
+    Tuple(Vec<hir::Type<'db>>),
 }
 
 /// Where to put extracted function definition
@@ -366,19 +366,19 @@ enum Anchor {
 // FIXME: ControlFlow and ContainerInfo both track some function modifiers, feels like these two should
 // probably be merged somehow.
 #[derive(Debug)]
-struct ControlFlow {
-    kind: Option<FlowKind>,
+struct ControlFlow<'db> {
+    kind: Option<FlowKind<'db>>,
     is_async: bool,
     is_unsafe: bool,
 }
 
 /// The thing whose expression we are extracting from. Can be a function, const, static, const arg, ...
 #[derive(Clone, Debug)]
-struct ContainerInfo {
+struct ContainerInfo<'db> {
     is_const: bool,
     parent_loop: Option<SyntaxNode>,
     /// The function's return type, const's type etc.
-    ret_type: Option<hir::Type>,
+    ret_type: Option<hir::Type<'db>>,
     generic_param_lists: Vec<ast::GenericParamList>,
     where_clauses: Vec<ast::WhereClause>,
     edition: Edition,
@@ -397,11 +397,11 @@ struct ContainerInfo {
 /// }
 /// ```
 #[derive(Debug, Clone)]
-enum FlowKind {
+enum FlowKind<'db> {
     /// Return with value (`return $expr;`)
     Return(Option<ast::Expr>),
     Try {
-        kind: TryKind,
+        kind: TryKind<'db>,
     },
     /// Break with label and value (`break 'label $expr;`)
     Break(Option<ast::Lifetime>, Option<ast::Expr>),
@@ -410,18 +410,18 @@ enum FlowKind {
 }
 
 #[derive(Debug, Clone)]
-enum TryKind {
+enum TryKind<'db> {
     Option,
-    Result { ty: hir::Type },
+    Result { ty: hir::Type<'db> },
 }
 
 #[derive(Debug)]
-enum RetType {
-    Expr(hir::Type),
+enum RetType<'db> {
+    Expr(hir::Type<'db>),
     Stmt,
 }
 
-impl RetType {
+impl RetType<'_> {
     fn is_unit(&self) -> bool {
         match self {
             RetType::Expr(ty) => ty.is_unit(),
@@ -464,8 +464,8 @@ impl LocalUsages {
     }
 }
 
-impl Function {
-    fn return_type(&self, ctx: &AssistContext<'_>) -> FunType {
+impl<'db> Function<'db> {
+    fn return_type(&self, ctx: &AssistContext<'db>) -> FunType<'db> {
         match &self.ret_ty {
             RetType::Expr(ty) if ty.is_unit() => FunType::Unit,
             RetType::Expr(ty) => FunType::Single(ty.clone()),
@@ -495,7 +495,7 @@ impl ParamKind {
     }
 }
 
-impl Param {
+impl<'db> Param<'db> {
     fn kind(&self) -> ParamKind {
         match (self.move_local, self.requires_mut, self.is_copy) {
             (false, true, _) => ParamKind::MutRef,
@@ -505,7 +505,7 @@ impl Param {
         }
     }
 
-    fn to_arg(&self, ctx: &AssistContext<'_>, edition: Edition) -> ast::Expr {
+    fn to_arg(&self, ctx: &AssistContext<'db>, edition: Edition) -> ast::Expr {
         let var = path_expr_from_local(ctx, self.var, edition);
         match self.kind() {
             ParamKind::Value | ParamKind::MutValue => var,
@@ -540,8 +540,12 @@ impl Param {
     }
 }
 
-impl TryKind {
-    fn of_ty(ty: hir::Type, ctx: &AssistContext<'_>, edition: Edition) -> Option<TryKind> {
+impl<'db> TryKind<'db> {
+    fn of_ty(
+        ty: hir::Type<'db>,
+        ctx: &AssistContext<'db>,
+        edition: Edition,
+    ) -> Option<TryKind<'db>> {
         if ty.is_unknown() {
             // We favour Result for `expr?`
             return Some(TryKind::Result { ty });
@@ -559,7 +563,7 @@ impl TryKind {
     }
 }
 
-impl FlowKind {
+impl<'db> FlowKind<'db> {
     fn make_result_handler(&self, expr: Option<ast::Expr>) -> ast::Expr {
         match self {
             FlowKind::Return(_) => make::expr_return(expr),
@@ -575,7 +579,7 @@ impl FlowKind {
         }
     }
 
-    fn expr_ty(&self, ctx: &AssistContext<'_>) -> Option<hir::Type> {
+    fn expr_ty(&self, ctx: &AssistContext<'db>) -> Option<hir::Type<'db>> {
         match self {
             FlowKind::Return(Some(expr)) | FlowKind::Break(_, Some(expr)) => {
                 ctx.sema.type_of_expr(expr).map(TypeInfo::adjusted)
@@ -849,11 +853,11 @@ impl FunctionBody {
         (res, self_param)
     }
 
-    fn analyze_container(
+    fn analyze_container<'db>(
         &self,
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         edition: Edition,
-    ) -> Option<(ContainerInfo, bool)> {
+    ) -> Option<(ContainerInfo<'db>, bool)> {
         let mut ancestors = self.parent()?.ancestors();
         let infer_expr_opt = |expr| sema.type_of_expr(&expr?).map(TypeInfo::adjusted);
         let mut parent_loop = None;
@@ -958,7 +962,7 @@ impl FunctionBody {
         ))
     }
 
-    fn return_ty(&self, ctx: &AssistContext<'_>) -> Option<RetType> {
+    fn return_ty<'db>(&self, ctx: &AssistContext<'db>) -> Option<RetType<'db>> {
         match self.tail_expr() {
             Some(expr) => ctx.sema.type_of_expr(&expr).map(TypeInfo::original).map(RetType::Expr),
             None => Some(RetType::Stmt),
@@ -979,11 +983,11 @@ impl FunctionBody {
     }
 
     /// Analyses the function body for external control flow.
-    fn external_control_flow(
+    fn external_control_flow<'db>(
         &self,
-        ctx: &AssistContext<'_>,
-        container_info: &ContainerInfo,
-    ) -> Option<ControlFlow> {
+        ctx: &AssistContext<'db>,
+        container_info: &ContainerInfo<'db>,
+    ) -> Option<ControlFlow<'db>> {
         let mut ret_expr = None;
         let mut try_expr = None;
         let mut break_expr = None;
@@ -1069,12 +1073,12 @@ impl FunctionBody {
     /// find variables that should be extracted as params
     ///
     /// Computes additional info that affects param type and mutability
-    fn extracted_function_params(
+    fn extracted_function_params<'db>(
         &self,
-        ctx: &AssistContext<'_>,
-        container_info: &ContainerInfo,
+        ctx: &AssistContext<'db>,
+        container_info: &ContainerInfo<'db>,
         locals: FxIndexSet<Local>,
-    ) -> Vec<Param> {
+    ) -> Vec<Param<'db>> {
         locals
             .into_iter()
             .sorted()
@@ -1422,7 +1426,7 @@ fn fixup_call_site(builder: &mut SourceChangeBuilder, body: &FunctionBody) {
     }
 }
 
-fn make_call(ctx: &AssistContext<'_>, fun: &Function, indent: IndentLevel) -> SyntaxNode {
+fn make_call(ctx: &AssistContext<'_>, fun: &Function<'_>, indent: IndentLevel) -> SyntaxNode {
     let ret_ty = fun.return_type(ctx);
 
     let args = make::arg_list(fun.params.iter().map(|param| param.to_arg(ctx, fun.mods.edition)));
@@ -1481,17 +1485,17 @@ fn make_call(ctx: &AssistContext<'_>, fun: &Function, indent: IndentLevel) -> Sy
     }
 }
 
-enum FlowHandler {
+enum FlowHandler<'db> {
     None,
-    Try { kind: TryKind },
-    If { action: FlowKind },
-    IfOption { action: FlowKind },
-    MatchOption { none: FlowKind },
-    MatchResult { err: FlowKind },
+    Try { kind: TryKind<'db> },
+    If { action: FlowKind<'db> },
+    IfOption { action: FlowKind<'db> },
+    MatchOption { none: FlowKind<'db> },
+    MatchResult { err: FlowKind<'db> },
 }
 
-impl FlowHandler {
-    fn from_ret_ty(fun: &Function, ret_ty: &FunType) -> FlowHandler {
+impl<'db> FlowHandler<'db> {
+    fn from_ret_ty(fun: &Function<'db>, ret_ty: &FunType<'db>) -> FlowHandler<'db> {
         if fun.contains_tail_expr {
             return FlowHandler::None;
         }
@@ -1601,7 +1605,7 @@ fn path_expr_from_local(ctx: &AssistContext<'_>, var: Local, edition: Edition) -
 fn format_function(
     ctx: &AssistContext<'_>,
     module: hir::Module,
-    fun: &Function,
+    fun: &Function<'_>,
     old_indent: IndentLevel,
 ) -> ast::Fn {
     let fun_name = make::name(&fun.name.text());
@@ -1627,7 +1631,7 @@ fn format_function(
 
 fn make_generic_params_and_where_clause(
     ctx: &AssistContext<'_>,
-    fun: &Function,
+    fun: &Function<'_>,
 ) -> (Option<ast::GenericParamList>, Option<ast::WhereClause>) {
     let used_type_params = fun.type_params(ctx);
 
@@ -1639,7 +1643,7 @@ fn make_generic_params_and_where_clause(
 
 fn make_generic_param_list(
     ctx: &AssistContext<'_>,
-    fun: &Function,
+    fun: &Function<'_>,
     used_type_params: &[TypeParam],
 ) -> Option<ast::GenericParamList> {
     let mut generic_params = fun
@@ -1676,7 +1680,7 @@ fn param_is_required(
 
 fn make_where_clause(
     ctx: &AssistContext<'_>,
-    fun: &Function,
+    fun: &Function<'_>,
     used_type_params: &[TypeParam],
 ) -> Option<ast::WhereClause> {
     let mut predicates = fun
@@ -1716,9 +1720,9 @@ fn resolved_type_param(ctx: &AssistContext<'_>, pred: &ast::WherePred) -> Option
     }
 }
 
-impl Function {
+impl<'db> Function<'db> {
     /// Collect all the `TypeParam`s used in the `body` and `params`.
-    fn type_params(&self, ctx: &AssistContext<'_>) -> Vec<TypeParam> {
+    fn type_params(&self, ctx: &AssistContext<'db>) -> Vec<TypeParam> {
         let type_params_in_descendant_paths =
             self.body.descendant_paths().filter_map(|it| match ctx.sema.resolve_path(&it) {
                 Some(PathResolution::TypeParam(type_param)) => Some(type_param),
@@ -1781,8 +1785,8 @@ impl Function {
     }
 }
 
-impl FunType {
-    fn make_ty(&self, ctx: &AssistContext<'_>, module: hir::Module) -> ast::Type {
+impl<'db> FunType<'db> {
+    fn make_ty(&self, ctx: &AssistContext<'db>, module: hir::Module) -> ast::Type {
         match self {
             FunType::Unit => make::ty_unit(),
             FunType::Single(ty) => make_ty(ty, ctx, module),
@@ -1804,7 +1808,11 @@ impl FunType {
     }
 }
 
-fn make_body(ctx: &AssistContext<'_>, old_indent: IndentLevel, fun: &Function) -> ast::BlockExpr {
+fn make_body(
+    ctx: &AssistContext<'_>,
+    old_indent: IndentLevel,
+    fun: &Function<'_>,
+) -> ast::BlockExpr {
     let ret_ty = fun.return_type(ctx);
     let handler = FlowHandler::from_ret_ty(fun, &ret_ty);
 
@@ -1981,19 +1989,19 @@ fn with_tail_expr(block: ast::BlockExpr, tail_expr: ast::Expr) -> ast::BlockExpr
     make::hacky_block_expr(elements, Some(tail_expr))
 }
 
-fn format_type(ty: &hir::Type, ctx: &AssistContext<'_>, module: hir::Module) -> String {
+fn format_type(ty: &hir::Type<'_>, ctx: &AssistContext<'_>, module: hir::Module) -> String {
     ty.display_source_code(ctx.db(), module.into(), true).ok().unwrap_or_else(|| "_".to_owned())
 }
 
-fn make_ty(ty: &hir::Type, ctx: &AssistContext<'_>, module: hir::Module) -> ast::Type {
+fn make_ty(ty: &hir::Type<'_>, ctx: &AssistContext<'_>, module: hir::Module) -> ast::Type {
     let ty_str = format_type(ty, ctx, module);
     make::ty(&ty_str)
 }
 
 fn rewrite_body_segment(
     ctx: &AssistContext<'_>,
-    params: &[Param],
-    handler: &FlowHandler,
+    params: &[Param<'_>],
+    handler: &FlowHandler<'_>,
     syntax: &SyntaxNode,
 ) -> SyntaxNode {
     let syntax = fix_param_usages(ctx, params, syntax);
@@ -2002,8 +2010,12 @@ fn rewrite_body_segment(
 }
 
 /// change all usages to account for added `&`/`&mut` for some params
-fn fix_param_usages(ctx: &AssistContext<'_>, params: &[Param], syntax: &SyntaxNode) -> SyntaxNode {
-    let mut usages_for_param: Vec<(&Param, Vec<ast::Expr>)> = Vec::new();
+fn fix_param_usages(
+    ctx: &AssistContext<'_>,
+    params: &[Param<'_>],
+    syntax: &SyntaxNode,
+) -> SyntaxNode {
+    let mut usages_for_param: Vec<(&Param<'_>, Vec<ast::Expr>)> = Vec::new();
 
     let tm = TreeMutator::new(syntax);
 
@@ -2057,7 +2069,7 @@ fn fix_param_usages(ctx: &AssistContext<'_>, params: &[Param], syntax: &SyntaxNo
     res
 }
 
-fn update_external_control_flow(handler: &FlowHandler, syntax: &SyntaxNode) {
+fn update_external_control_flow(handler: &FlowHandler<'_>, syntax: &SyntaxNode) {
     let mut nested_loop = None;
     let mut nested_scope = None;
     for event in syntax.preorder() {
@@ -2118,7 +2130,10 @@ fn update_external_control_flow(handler: &FlowHandler, syntax: &SyntaxNode) {
     }
 }
 
-fn make_rewritten_flow(handler: &FlowHandler, arg_expr: Option<ast::Expr>) -> Option<ast::Expr> {
+fn make_rewritten_flow(
+    handler: &FlowHandler<'_>,
+    arg_expr: Option<ast::Expr>,
+) -> Option<ast::Expr> {
     let value = match handler {
         FlowHandler::None | FlowHandler::Try { .. } => return None,
         FlowHandler::If { .. } => make::expr_call(
diff --git a/crates/ide-assists/src/handlers/generate_function.rs b/crates/ide-assists/src/handlers/generate_function.rs
index 55187c38c171..3f106d24b59c 100644
--- a/crates/ide-assists/src/handlers/generate_function.rs
+++ b/crates/ide-assists/src/handlers/generate_function.rs
@@ -306,7 +306,7 @@ impl FunctionBuilder {
         ctx: &AssistContext<'_>,
         call: &ast::MethodCallExpr,
         name: &ast::NameRef,
-        receiver_ty: Type,
+        receiver_ty: Type<'_>,
         target_module: Module,
         target: GeneratedFunctionTarget,
     ) -> Option<Self> {
diff --git a/crates/ide-assists/src/handlers/inline_call.rs b/crates/ide-assists/src/handlers/inline_call.rs
index bb445e572bef..b644b428d490 100644
--- a/crates/ide-assists/src/handlers/inline_call.rs
+++ b/crates/ide-assists/src/handlers/inline_call.rs
@@ -281,11 +281,11 @@ impl CallInfo {
     }
 }
 
-fn get_fn_params(
-    db: &dyn HirDatabase,
+fn get_fn_params<'db>(
+    db: &'db dyn HirDatabase,
     function: hir::Function,
     param_list: &ast::ParamList,
-) -> Option<Vec<(ast::Pat, Option<ast::Type>, hir::Param)>> {
+) -> Option<Vec<(ast::Pat, Option<ast::Type>, hir::Param<'db>)>> {
     let mut assoc_fn_params = function.assoc_fn_params(db).into_iter();
 
     let mut params = Vec::new();
@@ -314,7 +314,7 @@ fn inline(
     function_def_file_id: EditionedFileId,
     function: hir::Function,
     fn_body: &ast::BlockExpr,
-    params: &[(ast::Pat, Option<ast::Type>, hir::Param)],
+    params: &[(ast::Pat, Option<ast::Type>, hir::Param<'_>)],
     CallInfo { node, arguments, generic_arg_list, krate }: &CallInfo,
 ) -> ast::Expr {
     let file_id = sema.hir_file_for(fn_body.syntax());
diff --git a/crates/ide-assists/src/handlers/inline_const_as_literal.rs b/crates/ide-assists/src/handlers/inline_const_as_literal.rs
index e5ed04fdc7c9..b11d3792bc4c 100644
--- a/crates/ide-assists/src/handlers/inline_const_as_literal.rs
+++ b/crates/ide-assists/src/handlers/inline_const_as_literal.rs
@@ -58,7 +58,7 @@ pub(crate) fn inline_const_as_literal(acc: &mut Assists, ctx: &AssistContext<'_>
 
 fn validate_type_recursively(
     ctx: &AssistContext<'_>,
-    ty_hir: Option<&hir::Type>,
+    ty_hir: Option<&hir::Type<'_>>,
     refed: bool,
     fuel: i32,
 ) -> Option<()> {
diff --git a/crates/ide-assists/src/handlers/merge_match_arms.rs b/crates/ide-assists/src/handlers/merge_match_arms.rs
index 42f35210b496..08170f81b283 100644
--- a/crates/ide-assists/src/handlers/merge_match_arms.rs
+++ b/crates/ide-assists/src/handlers/merge_match_arms.rs
@@ -105,7 +105,7 @@ fn contains_placeholder(a: &ast::MatchArm) -> bool {
 }
 
 fn are_same_types(
-    current_arm_types: &FxHashMap<String, Option<Type>>,
+    current_arm_types: &FxHashMap<String, Option<Type<'_>>>,
     arm: &ast::MatchArm,
     ctx: &AssistContext<'_>,
 ) -> bool {
@@ -121,15 +121,15 @@ fn are_same_types(
     true
 }
 
-fn get_arm_types(
-    context: &AssistContext<'_>,
+fn get_arm_types<'db>(
+    context: &AssistContext<'db>,
     arm: &ast::MatchArm,
-) -> FxHashMap<String, Option<Type>> {
-    let mut mapping: FxHashMap<String, Option<Type>> = FxHashMap::default();
+) -> FxHashMap<String, Option<Type<'db>>> {
+    let mut mapping: FxHashMap<String, Option<Type<'db>>> = FxHashMap::default();
 
-    fn recurse(
-        map: &mut FxHashMap<String, Option<Type>>,
-        ctx: &AssistContext<'_>,
+    fn recurse<'db>(
+        map: &mut FxHashMap<String, Option<Type<'db>>>,
+        ctx: &AssistContext<'db>,
         pat: &Option<ast::Pat>,
     ) {
         if let Some(local_pat) = pat {
diff --git a/crates/ide-assists/src/handlers/qualify_path.rs b/crates/ide-assists/src/handlers/qualify_path.rs
index 4c213a27f4b8..890eba1b4a46 100644
--- a/crates/ide-assists/src/handlers/qualify_path.rs
+++ b/crates/ide-assists/src/handlers/qualify_path.rs
@@ -224,7 +224,7 @@ fn item_as_trait(db: &RootDatabase, item: hir::ItemInNs) -> Option<hir::Trait> {
     }
 }
 
-fn group_label(candidate: &ImportCandidate) -> GroupLabel {
+fn group_label(candidate: &ImportCandidate<'_>) -> GroupLabel {
     let name = match candidate {
         ImportCandidate::Path(it) => &it.name,
         ImportCandidate::TraitAssocItem(it) | ImportCandidate::TraitMethod(it) => {
@@ -237,7 +237,7 @@ fn group_label(candidate: &ImportCandidate) -> GroupLabel {
 
 fn label(
     db: &RootDatabase,
-    candidate: &ImportCandidate,
+    candidate: &ImportCandidate<'_>,
     import: &LocatedImport,
     edition: Edition,
 ) -> String {
diff --git a/crates/ide-assists/src/handlers/term_search.rs b/crates/ide-assists/src/handlers/term_search.rs
index 86121e7fc8c2..8c63ce81e03f 100644
--- a/crates/ide-assists/src/handlers/term_search.rs
+++ b/crates/ide-assists/src/handlers/term_search.rs
@@ -46,7 +46,7 @@ pub(crate) fn term_search(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<
         return None;
     }
 
-    let mut formatter = |_: &hir::Type| String::from("todo!()");
+    let mut formatter = |_: &hir::Type<'_>| String::from("todo!()");
 
     let edition = scope.krate().edition(ctx.db());
     let paths = paths
diff --git a/crates/ide-assists/src/utils.rs b/crates/ide-assists/src/utils.rs
index 8b81c920ec95..2202d1dbda39 100644
--- a/crates/ide-assists/src/utils.rs
+++ b/crates/ide-assists/src/utils.rs
@@ -389,7 +389,7 @@ pub(crate) fn does_pat_variant_nested_or_literal(ctx: &AssistContext<'_>, pat: &
 }
 
 fn check_pat_variant_from_enum(ctx: &AssistContext<'_>, pat: &ast::Pat) -> bool {
-    ctx.sema.type_of_pat(pat).is_none_or(|ty: hir::TypeInfo| {
+    ctx.sema.type_of_pat(pat).is_none_or(|ty: hir::TypeInfo<'_>| {
         ty.adjusted().as_adt().is_some_and(|adt| matches!(adt, hir::Adt::Enum(_)))
     })
 }
@@ -764,9 +764,9 @@ pub(crate) fn add_method_to_adt(
 }
 
 #[derive(Debug)]
-pub(crate) struct ReferenceConversion {
+pub(crate) struct ReferenceConversion<'db> {
     conversion: ReferenceConversionType,
-    ty: hir::Type,
+    ty: hir::Type<'db>,
     impls_deref: bool,
 }
 
@@ -786,10 +786,10 @@ enum ReferenceConversionType {
     Result,
 }
 
-impl ReferenceConversion {
+impl<'db> ReferenceConversion<'db> {
     pub(crate) fn convert_type(
         &self,
-        db: &dyn HirDatabase,
+        db: &'db dyn HirDatabase,
         display_target: DisplayTarget,
     ) -> ast::Type {
         let ty = match self.conversion {
@@ -861,11 +861,11 @@ impl ReferenceConversion {
 // FIXME: It should return a new hir::Type, but currently constructing new types is too cumbersome
 //        and all users of this function operate on string type names, so they can do the conversion
 //        itself themselves.
-pub(crate) fn convert_reference_type(
-    ty: hir::Type,
-    db: &RootDatabase,
-    famous_defs: &FamousDefs<'_, '_>,
-) -> Option<ReferenceConversion> {
+pub(crate) fn convert_reference_type<'db>(
+    ty: hir::Type<'db>,
+    db: &'db RootDatabase,
+    famous_defs: &FamousDefs<'_, 'db>,
+) -> Option<ReferenceConversion<'db>> {
     handle_copy(&ty, db)
         .or_else(|| handle_as_ref_str(&ty, db, famous_defs))
         .or_else(|| handle_as_ref_slice(&ty, db, famous_defs))
@@ -875,18 +875,21 @@ pub(crate) fn convert_reference_type(
         .map(|(conversion, impls_deref)| ReferenceConversion { ty, conversion, impls_deref })
 }
 
-fn could_deref_to_target(ty: &hir::Type, target: &hir::Type, db: &dyn HirDatabase) -> bool {
+fn could_deref_to_target(ty: &hir::Type<'_>, target: &hir::Type<'_>, db: &dyn HirDatabase) -> bool {
     let ty_ref = ty.add_reference(hir::Mutability::Shared);
     let target_ref = target.add_reference(hir::Mutability::Shared);
     ty_ref.could_coerce_to(db, &target_ref)
 }
 
-fn handle_copy(ty: &hir::Type, db: &dyn HirDatabase) -> Option<(ReferenceConversionType, bool)> {
+fn handle_copy(
+    ty: &hir::Type<'_>,
+    db: &dyn HirDatabase,
+) -> Option<(ReferenceConversionType, bool)> {
     ty.is_copy(db).then_some((ReferenceConversionType::Copy, true))
 }
 
 fn handle_as_ref_str(
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
     db: &dyn HirDatabase,
     famous_defs: &FamousDefs<'_, '_>,
 ) -> Option<(ReferenceConversionType, bool)> {
@@ -897,7 +900,7 @@ fn handle_as_ref_str(
 }
 
 fn handle_as_ref_slice(
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
     db: &dyn HirDatabase,
     famous_defs: &FamousDefs<'_, '_>,
 ) -> Option<(ReferenceConversionType, bool)> {
@@ -911,7 +914,7 @@ fn handle_as_ref_slice(
 }
 
 fn handle_dereferenced(
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
     db: &dyn HirDatabase,
     famous_defs: &FamousDefs<'_, '_>,
 ) -> Option<(ReferenceConversionType, bool)> {
@@ -924,7 +927,7 @@ fn handle_dereferenced(
 }
 
 fn handle_option_as_ref(
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
     db: &dyn HirDatabase,
     famous_defs: &FamousDefs<'_, '_>,
 ) -> Option<(ReferenceConversionType, bool)> {
@@ -936,7 +939,7 @@ fn handle_option_as_ref(
 }
 
 fn handle_result_as_ref(
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
     db: &dyn HirDatabase,
     famous_defs: &FamousDefs<'_, '_>,
 ) -> Option<(ReferenceConversionType, bool)> {
diff --git a/crates/ide-assists/src/utils/gen_trait_fn_body.rs b/crates/ide-assists/src/utils/gen_trait_fn_body.rs
index 5c2e27b3430f..b638910538c6 100644
--- a/crates/ide-assists/src/utils/gen_trait_fn_body.rs
+++ b/crates/ide-assists/src/utils/gen_trait_fn_body.rs
@@ -17,7 +17,7 @@ pub(crate) fn gen_trait_fn_body(
     func: &ast::Fn,
     trait_path: &ast::Path,
     adt: &ast::Adt,
-    trait_ref: Option<TraitRef>,
+    trait_ref: Option<TraitRef<'_>>,
 ) -> Option<()> {
     match trait_path.segment()?.name_ref()?.text().as_str() {
         "Clone" => gen_clone_impl(adt, func),
@@ -399,7 +399,7 @@ fn gen_hash_impl(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
 }
 
 /// Generate a `PartialEq` impl based on the fields and members of the target type.
-fn gen_partial_eq(adt: &ast::Adt, func: &ast::Fn, trait_ref: Option<TraitRef>) -> Option<()> {
+fn gen_partial_eq(adt: &ast::Adt, func: &ast::Fn, trait_ref: Option<TraitRef<'_>>) -> Option<()> {
     stdx::always!(func.name().is_some_and(|name| name.text() == "eq"));
     fn gen_eq_chain(expr: Option<ast::Expr>, cmp: ast::Expr) -> Option<ast::Expr> {
         match expr {
@@ -591,7 +591,7 @@ fn gen_partial_eq(adt: &ast::Adt, func: &ast::Fn, trait_ref: Option<TraitRef>) -
     Some(())
 }
 
-fn gen_partial_ord(adt: &ast::Adt, func: &ast::Fn, trait_ref: Option<TraitRef>) -> Option<()> {
+fn gen_partial_ord(adt: &ast::Adt, func: &ast::Fn, trait_ref: Option<TraitRef<'_>>) -> Option<()> {
     stdx::always!(func.name().is_some_and(|name| name.text() == "partial_cmp"));
     fn gen_partial_eq_match(match_target: ast::Expr) -> Option<ast::Stmt> {
         let mut arms = vec![];
diff --git a/crates/ide-completion/src/completions.rs b/crates/ide-completion/src/completions.rs
index c8cdad594978..852bca233a5a 100644
--- a/crates/ide-completion/src/completions.rs
+++ b/crates/ide-completion/src/completions.rs
@@ -161,7 +161,11 @@ impl Completions {
         item.add_to(self, ctx.db);
     }
 
-    pub(crate) fn add_expr(&mut self, ctx: &CompletionContext<'_>, expr: &hir::term_search::Expr) {
+    pub(crate) fn add_expr(
+        &mut self,
+        ctx: &CompletionContext<'_>,
+        expr: &hir::term_search::Expr<'_>,
+    ) {
         if let Some(item) = render_expr(ctx, expr) {
             item.add_to(self, ctx.db)
         }
@@ -170,7 +174,7 @@ impl Completions {
     pub(crate) fn add_crate_roots(
         &mut self,
         ctx: &CompletionContext<'_>,
-        path_ctx: &PathCompletionCtx,
+        path_ctx: &PathCompletionCtx<'_>,
     ) {
         ctx.process_all_names(&mut |name, res, doc_aliases| match res {
             ScopeDef::ModuleDef(hir::ModuleDef::Module(m)) if m.is_crate_root() => {
@@ -183,7 +187,7 @@ impl Completions {
     pub(crate) fn add_path_resolution(
         &mut self,
         ctx: &CompletionContext<'_>,
-        path_ctx: &PathCompletionCtx,
+        path_ctx: &PathCompletionCtx<'_>,
         local_name: hir::Name,
         resolution: hir::ScopeDef,
         doc_aliases: Vec<syntax::SmolStr>,
@@ -232,7 +236,7 @@ impl Completions {
     pub(crate) fn add_enum_variants(
         &mut self,
         ctx: &CompletionContext<'_>,
-        path_ctx: &PathCompletionCtx,
+        path_ctx: &PathCompletionCtx<'_>,
         e: hir::Enum,
     ) {
         if !ctx.check_stability_and_hidden(e) {
@@ -246,7 +250,7 @@ impl Completions {
     pub(crate) fn add_module(
         &mut self,
         ctx: &CompletionContext<'_>,
-        path_ctx: &PathCompletionCtx,
+        path_ctx: &PathCompletionCtx<'_>,
         module: hir::Module,
         local_name: hir::Name,
         doc_aliases: Vec<syntax::SmolStr>,
@@ -263,7 +267,7 @@ impl Completions {
     pub(crate) fn add_macro(
         &mut self,
         ctx: &CompletionContext<'_>,
-        path_ctx: &PathCompletionCtx,
+        path_ctx: &PathCompletionCtx<'_>,
         mac: hir::Macro,
         local_name: hir::Name,
     ) {
@@ -286,7 +290,7 @@ impl Completions {
     pub(crate) fn add_function(
         &mut self,
         ctx: &CompletionContext<'_>,
-        path_ctx: &PathCompletionCtx,
+        path_ctx: &PathCompletionCtx<'_>,
         func: hir::Function,
         local_name: Option<hir::Name>,
     ) {
@@ -312,7 +316,7 @@ impl Completions {
     pub(crate) fn add_method(
         &mut self,
         ctx: &CompletionContext<'_>,
-        dot_access: &DotAccess,
+        dot_access: &DotAccess<'_>,
         func: hir::Function,
         receiver: Option<SmolStr>,
         local_name: Option<hir::Name>,
@@ -340,7 +344,7 @@ impl Completions {
     pub(crate) fn add_method_with_import(
         &mut self,
         ctx: &CompletionContext<'_>,
-        dot_access: &DotAccess,
+        dot_access: &DotAccess<'_>,
         func: hir::Function,
         import: LocatedImport,
     ) {
@@ -407,7 +411,7 @@ impl Completions {
     pub(crate) fn add_qualified_enum_variant(
         &mut self,
         ctx: &CompletionContext<'_>,
-        path_ctx: &PathCompletionCtx,
+        path_ctx: &PathCompletionCtx<'_>,
         variant: hir::Variant,
         path: hir::ModPath,
     ) {
@@ -424,7 +428,7 @@ impl Completions {
     pub(crate) fn add_enum_variant(
         &mut self,
         ctx: &CompletionContext<'_>,
-        path_ctx: &PathCompletionCtx,
+        path_ctx: &PathCompletionCtx<'_>,
         variant: hir::Variant,
         local_name: Option<hir::Name>,
     ) {
@@ -447,10 +451,10 @@ impl Completions {
     pub(crate) fn add_field(
         &mut self,
         ctx: &CompletionContext<'_>,
-        dot_access: &DotAccess,
+        dot_access: &DotAccess<'_>,
         receiver: Option<SmolStr>,
         field: hir::Field,
-        ty: &hir::Type,
+        ty: &hir::Type<'_>,
     ) {
         let is_private_editable = match ctx.is_visible(&field) {
             Visible::Yes => false,
@@ -471,7 +475,7 @@ impl Completions {
     pub(crate) fn add_struct_literal(
         &mut self,
         ctx: &CompletionContext<'_>,
-        path_ctx: &PathCompletionCtx,
+        path_ctx: &PathCompletionCtx<'_>,
         strukt: hir::Struct,
         path: Option<hir::ModPath>,
         local_name: Option<hir::Name>,
@@ -518,7 +522,7 @@ impl Completions {
         ctx: &CompletionContext<'_>,
         receiver: Option<SmolStr>,
         field: usize,
-        ty: &hir::Type,
+        ty: &hir::Type<'_>,
     ) {
         // Only used for (unnamed) tuples, whose all fields *are* stable. No need to check
         // stability here.
@@ -550,7 +554,7 @@ impl Completions {
         &mut self,
         ctx: &CompletionContext<'_>,
         pattern_ctx: &PatternContext,
-        path_ctx: Option<&PathCompletionCtx>,
+        path_ctx: Option<&PathCompletionCtx<'_>>,
         variant: hir::Variant,
         local_name: Option<hir::Name>,
     ) {
@@ -705,7 +709,7 @@ pub(super) fn complete_name(
 pub(super) fn complete_name_ref(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    NameRefContext { nameref, kind }: &NameRefContext,
+    NameRefContext { nameref, kind }: &NameRefContext<'_>,
 ) {
     match kind {
         NameRefKind::Path(path_ctx) => {
diff --git a/crates/ide-completion/src/completions/attribute.rs b/crates/ide-completion/src/completions/attribute.rs
index 3c195f80fea4..32b1e7ce10ae 100644
--- a/crates/ide-completion/src/completions/attribute.rs
+++ b/crates/ide-completion/src/completions/attribute.rs
@@ -85,7 +85,7 @@ pub(crate) fn complete_known_attribute_input(
 pub(crate) fn complete_attribute_path(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx,
+    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx<'_>,
     &AttrCtx { kind, annotated_item_kind, ref derive_helpers }: &AttrCtx,
 ) {
     let is_inner = kind == AttrKind::Inner;
diff --git a/crates/ide-completion/src/completions/attribute/derive.rs b/crates/ide-completion/src/completions/attribute/derive.rs
index 2fc07e013828..267d92b6c090 100644
--- a/crates/ide-completion/src/completions/attribute/derive.rs
+++ b/crates/ide-completion/src/completions/attribute/derive.rs
@@ -13,7 +13,7 @@ use crate::{
 pub(crate) fn complete_derive_path(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx,
+    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx<'_>,
     existing_derives: &ExistingDerives,
 ) {
     let core = ctx.famous_defs().core();
diff --git a/crates/ide-completion/src/completions/dot.rs b/crates/ide-completion/src/completions/dot.rs
index 4f21136d214e..5340d65a142d 100644
--- a/crates/ide-completion/src/completions/dot.rs
+++ b/crates/ide-completion/src/completions/dot.rs
@@ -18,7 +18,7 @@ use crate::{
 pub(crate) fn complete_dot(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    dot_access: &DotAccess,
+    dot_access: &DotAccess<'_>,
 ) {
     let receiver_ty = match dot_access {
         DotAccess { receiver_ty: Some(receiver_ty), .. } => &receiver_ty.original,
@@ -130,8 +130,8 @@ pub(crate) fn complete_dot(
 pub(crate) fn complete_undotted_self(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx: &PathCompletionCtx,
-    expr_ctx: &PathExprCtx,
+    path_ctx: &PathCompletionCtx<'_>,
+    expr_ctx: &PathExprCtx<'_>,
 ) {
     if !ctx.config.enable_self_on_the_fly {
         return;
@@ -198,9 +198,9 @@ pub(crate) fn complete_undotted_self(
 fn complete_fields(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    receiver: &hir::Type,
-    mut named_field: impl FnMut(&mut Completions, hir::Field, hir::Type),
-    mut tuple_index: impl FnMut(&mut Completions, usize, hir::Type),
+    receiver: &hir::Type<'_>,
+    mut named_field: impl FnMut(&mut Completions, hir::Field, hir::Type<'_>),
+    mut tuple_index: impl FnMut(&mut Completions, usize, hir::Type<'_>),
     is_field_access: bool,
     is_method_access_with_parens: bool,
 ) {
@@ -230,7 +230,7 @@ fn complete_fields(
 
 fn complete_methods(
     ctx: &CompletionContext<'_>,
-    receiver: &hir::Type,
+    receiver: &hir::Type<'_>,
     traits_in_scope: &FxHashSet<hir::TraitId>,
     f: impl FnMut(hir::Function),
 ) {
diff --git a/crates/ide-completion/src/completions/expr.rs b/crates/ide-completion/src/completions/expr.rs
index 0494d4223d18..713d0c3fd9f4 100644
--- a/crates/ide-completion/src/completions/expr.rs
+++ b/crates/ide-completion/src/completions/expr.rs
@@ -47,8 +47,8 @@ where
 pub(crate) fn complete_expr_path(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx,
-    expr_ctx: &PathExprCtx,
+    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx<'_>,
+    expr_ctx: &PathExprCtx<'_>,
 ) {
     let _p = tracing::info_span!("complete_expr_path").entered();
     if !ctx.qualifier_ctx.none() {
diff --git a/crates/ide-completion/src/completions/field.rs b/crates/ide-completion/src/completions/field.rs
index 1441b0e3a01a..26afa9c8ad96 100644
--- a/crates/ide-completion/src/completions/field.rs
+++ b/crates/ide-completion/src/completions/field.rs
@@ -8,7 +8,7 @@ use crate::{
 pub(crate) fn complete_field_list_tuple_variant(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
 ) {
     if ctx.qualifier_ctx.vis_node.is_some() {
     } else if let PathCompletionCtx {
diff --git a/crates/ide-completion/src/completions/flyimport.rs b/crates/ide-completion/src/completions/flyimport.rs
index a74756138090..dad8a76de87d 100644
--- a/crates/ide-completion/src/completions/flyimport.rs
+++ b/crates/ide-completion/src/completions/flyimport.rs
@@ -111,7 +111,7 @@ use crate::{
 pub(crate) fn import_on_the_fly_path(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
 ) -> Option<()> {
     if !ctx.config.enable_imports_on_the_fly {
         return None;
@@ -175,7 +175,7 @@ pub(crate) fn import_on_the_fly_pat(
 pub(crate) fn import_on_the_fly_dot(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    dot_access: &DotAccess,
+    dot_access: &DotAccess<'_>,
 ) -> Option<()> {
     if !ctx.config.enable_imports_on_the_fly {
         return None;
@@ -203,8 +203,8 @@ pub(crate) fn import_on_the_fly_dot(
 fn import_on_the_fly(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx @ PathCompletionCtx { kind, .. }: &PathCompletionCtx,
-    import_assets: ImportAssets,
+    path_ctx @ PathCompletionCtx { kind, .. }: &PathCompletionCtx<'_>,
+    import_assets: ImportAssets<'_>,
     position: SyntaxNode,
     potential_import_name: String,
 ) -> Option<()> {
@@ -290,7 +290,7 @@ fn import_on_the_fly_pat_(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
     pattern_ctx: &PatternContext,
-    import_assets: ImportAssets,
+    import_assets: ImportAssets<'_>,
     position: SyntaxNode,
     potential_import_name: String,
 ) -> Option<()> {
@@ -335,8 +335,8 @@ fn import_on_the_fly_pat_(
 fn import_on_the_fly_method(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    dot_access: &DotAccess,
-    import_assets: ImportAssets,
+    dot_access: &DotAccess<'_>,
+    import_assets: ImportAssets<'_>,
     position: SyntaxNode,
     potential_import_name: String,
 ) -> Option<()> {
@@ -400,11 +400,11 @@ fn import_name(ctx: &CompletionContext<'_>) -> String {
     if token_kind.is_any_identifier() { ctx.token.to_string() } else { String::new() }
 }
 
-fn import_assets_for_path(
-    ctx: &CompletionContext<'_>,
+fn import_assets_for_path<'db>(
+    ctx: &CompletionContext<'db>,
     potential_import_name: &str,
     qualifier: Option<ast::Path>,
-) -> Option<ImportAssets> {
+) -> Option<ImportAssets<'db>> {
     let _p =
         tracing::info_span!("import_assets_for_path", ?potential_import_name, ?qualifier).entered();
 
diff --git a/crates/ide-completion/src/completions/item_list.rs b/crates/ide-completion/src/completions/item_list.rs
index 58e7f584ed6f..6ac30d24c382 100644
--- a/crates/ide-completion/src/completions/item_list.rs
+++ b/crates/ide-completion/src/completions/item_list.rs
@@ -10,8 +10,8 @@ pub(crate) mod trait_impl;
 pub(crate) fn complete_item_list_in_expr(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx: &PathCompletionCtx,
-    expr_ctx: &PathExprCtx,
+    path_ctx: &PathCompletionCtx<'_>,
+    expr_ctx: &PathExprCtx<'_>,
 ) {
     if !expr_ctx.in_block_expr {
         return;
@@ -25,7 +25,7 @@ pub(crate) fn complete_item_list_in_expr(
 pub(crate) fn complete_item_list(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx,
+    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx<'_>,
     kind: &ItemListKind,
 ) {
     let _p = tracing::info_span!("complete_item_list").entered();
diff --git a/crates/ide-completion/src/completions/item_list/trait_impl.rs b/crates/ide-completion/src/completions/item_list/trait_impl.rs
index e08271f39a32..8f6e2956c9ea 100644
--- a/crates/ide-completion/src/completions/item_list/trait_impl.rs
+++ b/crates/ide-completion/src/completions/item_list/trait_impl.rs
@@ -122,7 +122,7 @@ fn complete_trait_impl_name(
 pub(crate) fn complete_trait_impl_item_by_name(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
     name_ref: &Option<ast::NameRef>,
     impl_: &Option<ast::Impl>,
 ) {
diff --git a/crates/ide-completion/src/completions/pattern.rs b/crates/ide-completion/src/completions/pattern.rs
index ea3511d31caf..62fae1cb2374 100644
--- a/crates/ide-completion/src/completions/pattern.rs
+++ b/crates/ide-completion/src/completions/pattern.rs
@@ -124,7 +124,7 @@ pub(crate) fn complete_pattern(
 pub(crate) fn complete_pattern_path(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx,
+    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx<'_>,
 ) {
     match qualified {
         Qualified::With { resolution: Some(resolution), super_chain_len, .. } => {
diff --git a/crates/ide-completion/src/completions/postfix.rs b/crates/ide-completion/src/completions/postfix.rs
index 3a55e83026c4..88d80c552f48 100644
--- a/crates/ide-completion/src/completions/postfix.rs
+++ b/crates/ide-completion/src/completions/postfix.rs
@@ -28,7 +28,7 @@ use crate::{
 pub(crate) fn complete_postfix(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    dot_access: &DotAccess,
+    dot_access: &DotAccess<'_>,
 ) {
     if !ctx.config.enable_postfix_completions {
         return;
diff --git a/crates/ide-completion/src/completions/record.rs b/crates/ide-completion/src/completions/record.rs
index c18aab007b2c..36f38a70db63 100644
--- a/crates/ide-completion/src/completions/record.rs
+++ b/crates/ide-completion/src/completions/record.rs
@@ -88,7 +88,7 @@ pub(crate) fn complete_record_expr_fields(
 pub(crate) fn add_default_update(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    ty: Option<hir::TypeInfo>,
+    ty: Option<hir::TypeInfo<'_>>,
 ) {
     let default_trait = ctx.famous_defs().core_default_Default();
     let impls_default_trait = default_trait
@@ -117,7 +117,7 @@ pub(crate) fn add_default_update(
 fn complete_fields(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    missing_fields: Vec<(hir::Field, hir::Type)>,
+    missing_fields: Vec<(hir::Field, hir::Type<'_>)>,
 ) {
     for (field, ty) in missing_fields {
         // This should call something else, we shouldn't be synthesizing a DotAccess here
diff --git a/crates/ide-completion/src/completions/snippet.rs b/crates/ide-completion/src/completions/snippet.rs
index 31aae1167622..ead9852eff53 100644
--- a/crates/ide-completion/src/completions/snippet.rs
+++ b/crates/ide-completion/src/completions/snippet.rs
@@ -11,8 +11,8 @@ use crate::{
 pub(crate) fn complete_expr_snippet(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx: &PathCompletionCtx,
-    &PathExprCtx { in_block_expr, .. }: &PathExprCtx,
+    path_ctx: &PathCompletionCtx<'_>,
+    &PathExprCtx { in_block_expr, .. }: &PathExprCtx<'_>,
 ) {
     if !matches!(path_ctx.qualified, Qualified::No) {
         return;
@@ -51,7 +51,7 @@ macro_rules! $1 {
 pub(crate) fn complete_item_snippet(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
     kind: &ItemListKind,
 ) {
     if !matches!(path_ctx.qualified, Qualified::No) {
diff --git a/crates/ide-completion/src/completions/type.rs b/crates/ide-completion/src/completions/type.rs
index 79db705af495..7c38c7d8ce44 100644
--- a/crates/ide-completion/src/completions/type.rs
+++ b/crates/ide-completion/src/completions/type.rs
@@ -12,7 +12,7 @@ use crate::{
 pub(crate) fn complete_type_path(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx,
+    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx<'_>,
     location: &TypeLocation,
 ) {
     let _p = tracing::info_span!("complete_type_path").entered();
@@ -220,7 +220,7 @@ pub(crate) fn complete_type_path(
 pub(crate) fn complete_ascribed_type(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
     ascription: &TypeAscriptionTarget,
 ) -> Option<()> {
     if !path_ctx.is_trivial_path() {
diff --git a/crates/ide-completion/src/completions/use_.rs b/crates/ide-completion/src/completions/use_.rs
index 4d6d0b758a38..d2ab193ec3df 100644
--- a/crates/ide-completion/src/completions/use_.rs
+++ b/crates/ide-completion/src/completions/use_.rs
@@ -13,7 +13,7 @@ use crate::{
 pub(crate) fn complete_use_path(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx @ PathCompletionCtx { qualified, use_tree_parent, .. }: &PathCompletionCtx,
+    path_ctx @ PathCompletionCtx { qualified, use_tree_parent, .. }: &PathCompletionCtx<'_>,
     name_ref: &Option<ast::NameRef>,
 ) {
     match qualified {
diff --git a/crates/ide-completion/src/completions/vis.rs b/crates/ide-completion/src/completions/vis.rs
index d15c35ac8499..38761f77a2c5 100644
--- a/crates/ide-completion/src/completions/vis.rs
+++ b/crates/ide-completion/src/completions/vis.rs
@@ -8,7 +8,7 @@ use crate::{
 pub(crate) fn complete_vis_path(
     acc: &mut Completions,
     ctx: &CompletionContext<'_>,
-    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx,
+    path_ctx @ PathCompletionCtx { qualified, .. }: &PathCompletionCtx<'_>,
     &has_in_token: &bool,
 ) {
     match qualified {
diff --git a/crates/ide-completion/src/context.rs b/crates/ide-completion/src/context.rs
index fd25ee05e039..ea748a8539e0 100644
--- a/crates/ide-completion/src/context.rs
+++ b/crates/ide-completion/src/context.rs
@@ -65,13 +65,13 @@ impl QualifierCtx {
 
 /// The state of the path we are currently completing.
 #[derive(Debug)]
-pub(crate) struct PathCompletionCtx {
+pub(crate) struct PathCompletionCtx<'db> {
     /// If this is a call with () already there (or {} in case of record patterns)
     pub(crate) has_call_parens: bool,
     /// If this has a macro call bang !
     pub(crate) has_macro_bang: bool,
     /// The qualifier of the current path.
-    pub(crate) qualified: Qualified,
+    pub(crate) qualified: Qualified<'db>,
     /// The parent of the path we are completing.
     pub(crate) parent: Option<ast::Path>,
     #[allow(dead_code)]
@@ -79,14 +79,14 @@ pub(crate) struct PathCompletionCtx {
     pub(crate) path: ast::Path,
     /// The path of which we are completing the segment in the original file
     pub(crate) original_path: Option<ast::Path>,
-    pub(crate) kind: PathKind,
+    pub(crate) kind: PathKind<'db>,
     /// Whether the path segment has type args or not.
     pub(crate) has_type_args: bool,
     /// Whether the qualifier comes from a use tree parent or not
     pub(crate) use_tree_parent: bool,
 }
 
-impl PathCompletionCtx {
+impl PathCompletionCtx<'_> {
     pub(crate) fn is_trivial_path(&self) -> bool {
         matches!(
             self,
@@ -104,9 +104,9 @@ impl PathCompletionCtx {
 
 /// The kind of path we are completing right now.
 #[derive(Debug, PartialEq, Eq)]
-pub(crate) enum PathKind {
+pub(crate) enum PathKind<'db> {
     Expr {
-        expr_ctx: PathExprCtx,
+        expr_ctx: PathExprCtx<'db>,
     },
     Type {
         location: TypeLocation,
@@ -140,7 +140,7 @@ pub(crate) struct AttrCtx {
 }
 
 #[derive(Debug, PartialEq, Eq)]
-pub(crate) struct PathExprCtx {
+pub(crate) struct PathExprCtx<'db> {
     pub(crate) in_block_expr: bool,
     pub(crate) in_breakable: BreakableKind,
     pub(crate) after_if_expr: bool,
@@ -152,7 +152,7 @@ pub(crate) struct PathExprCtx {
     /// The surrounding RecordExpression we are completing a functional update
     pub(crate) is_func_update: Option<ast::RecordExpr>,
     pub(crate) self_param: Option<hir::SelfParam>,
-    pub(crate) innermost_ret_ty: Option<hir::Type>,
+    pub(crate) innermost_ret_ty: Option<hir::Type<'db>>,
     pub(crate) impl_: Option<ast::Impl>,
     /// Whether this expression occurs in match arm guard position: before the
     /// fat arrow token
@@ -241,7 +241,7 @@ pub(crate) enum ItemListKind {
 }
 
 #[derive(Debug)]
-pub(crate) enum Qualified {
+pub(crate) enum Qualified<'db> {
     No,
     With {
         path: ast::Path,
@@ -260,7 +260,7 @@ pub(crate) enum Qualified {
     },
     /// <_>::
     TypeAnchor {
-        ty: Option<hir::Type>,
+        ty: Option<hir::Type<'db>>,
         trait_: Option<hir::Trait>,
     },
     /// Whether the path is an absolute path
@@ -341,17 +341,17 @@ pub(crate) enum NameKind {
 
 /// The state of the NameRef we are completing.
 #[derive(Debug)]
-pub(crate) struct NameRefContext {
+pub(crate) struct NameRefContext<'db> {
     /// NameRef syntax in the original file
     pub(crate) nameref: Option<ast::NameRef>,
-    pub(crate) kind: NameRefKind,
+    pub(crate) kind: NameRefKind<'db>,
 }
 
 /// The kind of the NameRef we are completing.
 #[derive(Debug)]
-pub(crate) enum NameRefKind {
-    Path(PathCompletionCtx),
-    DotAccess(DotAccess),
+pub(crate) enum NameRefKind<'db> {
+    Path(PathCompletionCtx<'db>),
+    DotAccess(DotAccess<'db>),
     /// Position where we are only interested in keyword completions
     Keyword(ast::Item),
     /// The record expression this nameref is a field of and whether a dot precedes the completion identifier.
@@ -365,9 +365,9 @@ pub(crate) enum NameRefKind {
 
 /// The identifier we are currently completing.
 #[derive(Debug)]
-pub(crate) enum CompletionAnalysis {
+pub(crate) enum CompletionAnalysis<'db> {
     Name(NameContext),
-    NameRef(NameRefContext),
+    NameRef(NameRefContext<'db>),
     Lifetime(LifetimeContext),
     /// The string the cursor is currently inside
     String {
@@ -386,9 +386,9 @@ pub(crate) enum CompletionAnalysis {
 
 /// Information about the field or method access we are completing.
 #[derive(Debug)]
-pub(crate) struct DotAccess {
+pub(crate) struct DotAccess<'db> {
     pub(crate) receiver: Option<ast::Expr>,
-    pub(crate) receiver_ty: Option<TypeInfo>,
+    pub(crate) receiver_ty: Option<TypeInfo<'db>>,
     pub(crate) kind: DotAccessKind,
     pub(crate) ctx: DotAccessExprCtx,
 }
@@ -457,7 +457,7 @@ pub(crate) struct CompletionContext<'a> {
     /// This is usually the parameter name of the function argument we are completing.
     pub(crate) expected_name: Option<NameOrNameRef>,
     /// The expected type of what we are completing.
-    pub(crate) expected_type: Option<Type>,
+    pub(crate) expected_type: Option<Type<'a>>,
 
     pub(crate) qualifier_ctx: QualifierCtx,
 
@@ -608,7 +608,7 @@ impl CompletionContext<'_> {
 
     pub(crate) fn iterate_path_candidates(
         &self,
-        ty: &hir::Type,
+        ty: &hir::Type<'_>,
         mut cb: impl FnMut(hir::AssocItem),
     ) {
         let mut seen = FxHashSet::default();
@@ -695,12 +695,12 @@ impl CompletionContext<'_> {
 }
 
 // CompletionContext construction
-impl<'a> CompletionContext<'a> {
+impl<'db> CompletionContext<'db> {
     pub(crate) fn new(
-        db: &'a RootDatabase,
+        db: &'db RootDatabase,
         position @ FilePosition { file_id, offset }: FilePosition,
-        config: &'a CompletionConfig<'a>,
-    ) -> Option<(CompletionContext<'a>, CompletionAnalysis)> {
+        config: &'db CompletionConfig<'db>,
+    ) -> Option<(CompletionContext<'db>, CompletionAnalysis<'db>)> {
         let _p = tracing::info_span!("CompletionContext::new").entered();
         let sema = Semantics::new(db);
 
diff --git a/crates/ide-completion/src/context/analysis.rs b/crates/ide-completion/src/context/analysis.rs
index 8f58c2181ef4..de264b776773 100644
--- a/crates/ide-completion/src/context/analysis.rs
+++ b/crates/ide-completion/src/context/analysis.rs
@@ -35,9 +35,9 @@ struct ExpansionResult {
     derive_ctx: Option<(SyntaxNode, SyntaxNode, TextSize, ast::Attr)>,
 }
 
-pub(super) struct AnalysisResult {
-    pub(super) analysis: CompletionAnalysis,
-    pub(super) expected: (Option<Type>, Option<ast::NameOrNameRef>),
+pub(super) struct AnalysisResult<'db> {
+    pub(super) analysis: CompletionAnalysis<'db>,
+    pub(super) expected: (Option<Type<'db>>, Option<ast::NameOrNameRef>),
     pub(super) qualifier_ctx: QualifierCtx,
     /// the original token of the expanded file
     pub(super) token: SyntaxToken,
@@ -45,13 +45,13 @@ pub(super) struct AnalysisResult {
     pub(super) original_offset: TextSize,
 }
 
-pub(super) fn expand_and_analyze(
-    sema: &Semantics<'_, RootDatabase>,
+pub(super) fn expand_and_analyze<'db>(
+    sema: &Semantics<'db, RootDatabase>,
     original_file: SyntaxNode,
     speculative_file: SyntaxNode,
     offset: TextSize,
     original_token: &SyntaxToken,
-) -> Option<AnalysisResult> {
+) -> Option<AnalysisResult<'db>> {
     // as we insert after the offset, right biased will *always* pick the identifier no matter
     // if there is an ident already typed or not
     let fake_ident_token = speculative_file.token_at_offset(offset).right_biased()?;
@@ -434,12 +434,13 @@ fn expand(
 
 /// Fill the completion context, this is what does semantic reasoning about the surrounding context
 /// of the completion location.
-fn analyze(
-    sema: &Semantics<'_, RootDatabase>,
+fn analyze<'db>(
+    sema: &Semantics<'db, RootDatabase>,
     expansion_result: ExpansionResult,
     original_token: &SyntaxToken,
     self_token: &SyntaxToken,
-) -> Option<(CompletionAnalysis, (Option<Type>, Option<ast::NameOrNameRef>), QualifierCtx)> {
+) -> Option<(CompletionAnalysis<'db>, (Option<Type<'db>>, Option<ast::NameOrNameRef>), QualifierCtx)>
+{
     let _p = tracing::info_span!("CompletionContext::analyze").entered();
     let ExpansionResult {
         original_file,
@@ -557,17 +558,17 @@ fn analyze(
 }
 
 /// Calculate the expected type and name of the cursor position.
-fn expected_type_and_name(
-    sema: &Semantics<'_, RootDatabase>,
+fn expected_type_and_name<'db>(
+    sema: &Semantics<'db, RootDatabase>,
     token: &SyntaxToken,
     name_like: &ast::NameLike,
-) -> (Option<Type>, Option<NameOrNameRef>) {
+) -> (Option<Type<'db>>, Option<NameOrNameRef>) {
     let mut node = match token.parent() {
         Some(it) => it,
         None => return (None, None),
     };
 
-    let strip_refs = |mut ty: Type| match name_like {
+    let strip_refs = |mut ty: Type<'db>| match name_like {
         ast::NameLike::NameRef(n) => {
             let p = match n.syntax().parent() {
                 Some(it) => it,
@@ -809,13 +810,13 @@ fn classify_name(
     Some(NameContext { name, kind })
 }
 
-fn classify_name_ref(
-    sema: &Semantics<'_, RootDatabase>,
+fn classify_name_ref<'db>(
+    sema: &Semantics<'db, RootDatabase>,
     original_file: &SyntaxNode,
     name_ref: ast::NameRef,
     original_offset: TextSize,
     parent: SyntaxNode,
-) -> Option<(NameRefContext, QualifierCtx)> {
+) -> Option<(NameRefContext<'db>, QualifierCtx)> {
     let nameref = find_node_at_offset(original_file, original_offset);
 
     let make_res = |kind| (NameRefContext { nameref: nameref.clone(), kind }, Default::default());
diff --git a/crates/ide-completion/src/item.rs b/crates/ide-completion/src/item.rs
index e208b9fd41ae..6c0f6cb491ba 100644
--- a/crates/ide-completion/src/item.rs
+++ b/crates/ide-completion/src/item.rs
@@ -502,7 +502,7 @@ pub(crate) struct Builder {
 impl Builder {
     pub(crate) fn from_resolution(
         ctx: &CompletionContext<'_>,
-        path_ctx: &PathCompletionCtx,
+        path_ctx: &PathCompletionCtx<'_>,
         local_name: hir::Name,
         resolution: hir::ScopeDef,
     ) -> Self {
diff --git a/crates/ide-completion/src/render.rs b/crates/ide-completion/src/render.rs
index b0adbad74ed1..df8da4800a6d 100644
--- a/crates/ide-completion/src/render.rs
+++ b/crates/ide-completion/src/render.rs
@@ -122,10 +122,10 @@ impl<'a> RenderContext<'a> {
 
 pub(crate) fn render_field(
     ctx: RenderContext<'_>,
-    dot_access: &DotAccess,
+    dot_access: &DotAccess<'_>,
     receiver: Option<SmolStr>,
     field: hir::Field,
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
 ) -> CompletionItem {
     let db = ctx.db();
     let is_deprecated = ctx.is_deprecated(field);
@@ -204,7 +204,7 @@ pub(crate) fn render_tuple_field(
     ctx: RenderContext<'_>,
     receiver: Option<SmolStr>,
     field: usize,
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
 ) -> CompletionItem {
     let mut item = CompletionItem::new(
         SymbolKind::Field,
@@ -241,7 +241,7 @@ pub(crate) fn render_type_inference(
 
 pub(crate) fn render_path_resolution(
     ctx: RenderContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
     local_name: hir::Name,
     resolution: ScopeDef,
 ) -> Builder {
@@ -259,7 +259,7 @@ pub(crate) fn render_pattern_resolution(
 
 pub(crate) fn render_resolution_with_import(
     ctx: RenderContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
     import_edit: LocatedImport,
 ) -> Option<Builder> {
     let resolution = ScopeDef::from(import_edit.original_item);
@@ -282,10 +282,10 @@ pub(crate) fn render_resolution_with_import_pat(
 
 pub(crate) fn render_expr(
     ctx: &CompletionContext<'_>,
-    expr: &hir::term_search::Expr,
+    expr: &hir::term_search::Expr<'_>,
 ) -> Option<Builder> {
     let mut i = 1;
-    let mut snippet_formatter = |ty: &hir::Type| {
+    let mut snippet_formatter = |ty: &hir::Type<'_>| {
         let arg_name = ty
             .as_adt()
             .map(|adt| stdx::to_lower_snake_case(adt.name(ctx.db).as_str()))
@@ -295,7 +295,7 @@ pub(crate) fn render_expr(
         res
     };
 
-    let mut label_formatter = |ty: &hir::Type| {
+    let mut label_formatter = |ty: &hir::Type<'_>| {
         ty.as_adt()
             .map(|adt| stdx::to_lower_snake_case(adt.name(ctx.db).as_str()))
             .unwrap_or_else(|| String::from("..."))
@@ -391,7 +391,7 @@ fn render_resolution_pat(
 
 fn render_resolution_path(
     ctx: RenderContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
     local_name: hir::Name,
     import_to_add: Option<LocatedImport>,
     resolution: ScopeDef,
@@ -460,7 +460,7 @@ fn render_resolution_path(
         }
     }
 
-    let mut set_item_relevance = |ty: Type| {
+    let mut set_item_relevance = |ty: Type<'_>| {
         if !ty.is_unknown() {
             item.detail(ty.display(db, krate).to_string());
         }
@@ -593,8 +593,8 @@ fn scope_def_is_deprecated(ctx: &RenderContext<'_>, resolution: ScopeDef) -> boo
 // FIXME: This checks types without possible coercions which some completions might want to do
 fn match_types(
     ctx: &CompletionContext<'_>,
-    ty1: &hir::Type,
-    ty2: &hir::Type,
+    ty1: &hir::Type<'_>,
+    ty2: &hir::Type<'_>,
 ) -> Option<CompletionRelevanceTypeMatch> {
     if ty1 == ty2 {
         Some(CompletionRelevanceTypeMatch::Exact)
@@ -607,7 +607,7 @@ fn match_types(
 
 fn compute_type_match(
     ctx: &CompletionContext<'_>,
-    completion_ty: &hir::Type,
+    completion_ty: &hir::Type<'_>,
 ) -> Option<CompletionRelevanceTypeMatch> {
     let expected_type = ctx.expected_type.as_ref()?;
 
@@ -626,7 +626,7 @@ fn compute_exact_name_match(ctx: &CompletionContext<'_>, completion_name: &str)
 
 fn compute_ref_match(
     ctx: &CompletionContext<'_>,
-    completion_ty: &hir::Type,
+    completion_ty: &hir::Type<'_>,
 ) -> Option<CompletionItemRefMode> {
     let expected_type = ctx.expected_type.as_ref()?;
     let expected_without_ref = expected_type.remove_ref();
@@ -658,8 +658,8 @@ fn compute_ref_match(
 
 fn path_ref_match(
     completion: &CompletionContext<'_>,
-    path_ctx: &PathCompletionCtx,
-    ty: &hir::Type,
+    path_ctx: &PathCompletionCtx<'_>,
+    ty: &hir::Type<'_>,
     item: &mut Builder,
 ) {
     if let Some(original_path) = &path_ctx.original_path {
diff --git a/crates/ide-completion/src/render/function.rs b/crates/ide-completion/src/render/function.rs
index 2fe517fa8cd0..7669aec8f535 100644
--- a/crates/ide-completion/src/render/function.rs
+++ b/crates/ide-completion/src/render/function.rs
@@ -22,13 +22,13 @@ use crate::{
 
 #[derive(Debug)]
 enum FuncKind<'ctx> {
-    Function(&'ctx PathCompletionCtx),
-    Method(&'ctx DotAccess, Option<SmolStr>),
+    Function(&'ctx PathCompletionCtx<'ctx>),
+    Method(&'ctx DotAccess<'ctx>, Option<SmolStr>),
 }
 
 pub(crate) fn render_fn(
     ctx: RenderContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
     local_name: Option<hir::Name>,
     func: hir::Function,
 ) -> Builder {
@@ -38,7 +38,7 @@ pub(crate) fn render_fn(
 
 pub(crate) fn render_method(
     ctx: RenderContext<'_>,
-    dot_access: &DotAccess,
+    dot_access: &DotAccess<'_>,
     receiver: Option<SmolStr>,
     local_name: Option<hir::Name>,
     func: hir::Function,
@@ -186,8 +186,8 @@ fn render(
 fn compute_return_type_match(
     db: &dyn HirDatabase,
     ctx: &RenderContext<'_>,
-    self_type: hir::Type,
-    ret_type: &hir::Type,
+    self_type: hir::Type<'_>,
+    ret_type: &hir::Type<'_>,
 ) -> CompletionRelevanceReturnType {
     if match_types(ctx.completion, &self_type, ret_type).is_some() {
         // fn([..]) -> Self
@@ -217,8 +217,8 @@ pub(super) fn add_call_parens<'b>(
     name: SmolStr,
     escaped_name: SmolStr,
     self_param: Option<hir::SelfParam>,
-    params: Vec<hir::Param>,
-    ret_type: &hir::Type,
+    params: Vec<hir::Param<'_>>,
+    ret_type: &hir::Type<'_>,
 ) -> &'b mut Builder {
     cov_mark::hit!(inserts_parens_for_function_calls);
 
@@ -288,7 +288,7 @@ pub(super) fn add_call_parens<'b>(
     builder.label(SmolStr::from_iter([&name, label_suffix])).insert_snippet(cap, snippet)
 }
 
-fn ref_of_param(ctx: &CompletionContext<'_>, arg: &str, ty: &hir::Type) -> &'static str {
+fn ref_of_param(ctx: &CompletionContext<'_>, arg: &str, ty: &hir::Type<'_>) -> &'static str {
     if let Some(derefed_ty) = ty.remove_ref() {
         for (name, local) in ctx.locals.iter().sorted_by_key(|&(k, _)| k.clone()) {
             if name.as_str() == arg {
@@ -369,12 +369,12 @@ fn params_display(ctx: &CompletionContext<'_>, detail: &mut String, func: hir::F
     }
 }
 
-fn params(
-    ctx: &CompletionContext<'_>,
+fn params<'db>(
+    ctx: &CompletionContext<'db>,
     func: hir::Function,
     func_kind: &FuncKind<'_>,
     has_dot_receiver: bool,
-) -> Option<(Option<hir::SelfParam>, Vec<hir::Param>)> {
+) -> Option<(Option<hir::SelfParam>, Vec<hir::Param<'db>>)> {
     ctx.config.callable.as_ref()?;
 
     // Don't add parentheses if the expected type is a function reference with the same signature.
diff --git a/crates/ide-completion/src/render/literal.rs b/crates/ide-completion/src/render/literal.rs
index 5a9e35a7290b..6c89e49f94e8 100644
--- a/crates/ide-completion/src/render/literal.rs
+++ b/crates/ide-completion/src/render/literal.rs
@@ -21,7 +21,7 @@ use crate::{
 
 pub(crate) fn render_variant_lit(
     ctx: RenderContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
     local_name: Option<hir::Name>,
     variant: hir::Variant,
     path: Option<hir::ModPath>,
@@ -35,7 +35,7 @@ pub(crate) fn render_variant_lit(
 
 pub(crate) fn render_struct_literal(
     ctx: RenderContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
     strukt: hir::Struct,
     path: Option<hir::ModPath>,
     local_name: Option<hir::Name>,
@@ -49,7 +49,7 @@ pub(crate) fn render_struct_literal(
 
 fn render(
     ctx @ RenderContext { completion, .. }: RenderContext<'_>,
-    path_ctx: &PathCompletionCtx,
+    path_ctx: &PathCompletionCtx<'_>,
     thing: Variant,
     name: hir::Name,
     path: Option<hir::ModPath>,
@@ -194,7 +194,7 @@ impl Variant {
         }
     }
 
-    fn ty(self, db: &dyn HirDatabase) -> hir::Type {
+    fn ty(self, db: &dyn HirDatabase) -> hir::Type<'_> {
         match self {
             Variant::Struct(it) => it.ty(db),
             Variant::EnumVariant(it) => it.parent_enum(db).ty(db),
diff --git a/crates/ide-completion/src/render/macro_.rs b/crates/ide-completion/src/render/macro_.rs
index 4674dae03144..35fe407b2e68 100644
--- a/crates/ide-completion/src/render/macro_.rs
+++ b/crates/ide-completion/src/render/macro_.rs
@@ -12,7 +12,7 @@ use crate::{
 
 pub(crate) fn render_macro(
     ctx: RenderContext<'_>,
-    PathCompletionCtx { kind, has_macro_bang, has_call_parens, .. }: &PathCompletionCtx,
+    PathCompletionCtx { kind, has_macro_bang, has_call_parens, .. }: &PathCompletionCtx<'_>,
 
     name: hir::Name,
     macro_: hir::Macro,
diff --git a/crates/ide-completion/src/render/pattern.rs b/crates/ide-completion/src/render/pattern.rs
index 8332cd0bcb83..8c5590f960ca 100644
--- a/crates/ide-completion/src/render/pattern.rs
+++ b/crates/ide-completion/src/render/pattern.rs
@@ -46,7 +46,7 @@ pub(crate) fn render_struct_pat(
 pub(crate) fn render_variant_pat(
     ctx: RenderContext<'_>,
     pattern_ctx: &PatternContext,
-    path_ctx: Option<&PathCompletionCtx>,
+    path_ctx: Option<&PathCompletionCtx<'_>>,
     variant: hir::Variant,
     local_name: Option<Name>,
     path: Option<&hir::ModPath>,
@@ -109,7 +109,7 @@ fn build_completion(
     lookup: SmolStr,
     pat: String,
     def: impl HasDocs + Copy,
-    adt_ty: hir::Type,
+    adt_ty: hir::Type<'_>,
     // Missing in context of match statement completions
     is_variant_missing: bool,
 ) -> CompletionItem {
diff --git a/crates/ide-db/src/active_parameter.rs b/crates/ide-db/src/active_parameter.rs
index 06ed4afdf9be..e5caf1b94b8f 100644
--- a/crates/ide-db/src/active_parameter.rs
+++ b/crates/ide-db/src/active_parameter.rs
@@ -12,14 +12,14 @@ use syntax::{
 use crate::RootDatabase;
 
 #[derive(Debug)]
-pub struct ActiveParameter {
-    pub ty: Type,
+pub struct ActiveParameter<'db> {
+    pub ty: Type<'db>,
     pub src: Option<InFile<Either<ast::SelfParam, ast::Param>>>,
 }
 
-impl ActiveParameter {
+impl<'db> ActiveParameter<'db> {
     /// Returns information about the call argument this token is part of.
-    pub fn at_token(sema: &Semantics<'_, RootDatabase>, token: SyntaxToken) -> Option<Self> {
+    pub fn at_token(sema: &Semantics<'db, RootDatabase>, token: SyntaxToken) -> Option<Self> {
         let (signature, active_parameter) = callable_for_token(sema, token)?;
 
         let idx = active_parameter?;
@@ -45,10 +45,10 @@ impl ActiveParameter {
 }
 
 /// Returns a [`hir::Callable`] this token is a part of and its argument index of said callable.
-pub fn callable_for_token(
-    sema: &Semantics<'_, RootDatabase>,
+pub fn callable_for_token<'db>(
+    sema: &Semantics<'db, RootDatabase>,
     token: SyntaxToken,
-) -> Option<(hir::Callable, Option<usize>)> {
+) -> Option<(hir::Callable<'db>, Option<usize>)> {
     // Find the calling expression and its NameRef
     let parent = token.parent()?;
     let calling_node = parent.ancestors().filter_map(ast::CallableExpr::cast).find(|it| {
@@ -59,11 +59,11 @@ pub fn callable_for_token(
     callable_for_node(sema, &calling_node, &token)
 }
 
-pub fn callable_for_node(
-    sema: &Semantics<'_, RootDatabase>,
+pub fn callable_for_node<'db>(
+    sema: &Semantics<'db, RootDatabase>,
     calling_node: &ast::CallableExpr,
     token: &SyntaxToken,
-) -> Option<(hir::Callable, Option<usize>)> {
+) -> Option<(hir::Callable<'db>, Option<usize>)> {
     let callable = match calling_node {
         ast::CallableExpr::Call(call) => sema.resolve_expr_as_callable(&call.expr()?),
         ast::CallableExpr::MethodCall(call) => sema.resolve_method_call_as_callable(call),
diff --git a/crates/ide-db/src/defs.rs b/crates/ide-db/src/defs.rs
index 18126f616c9e..bd257ce7279e 100644
--- a/crates/ide-db/src/defs.rs
+++ b/crates/ide-db/src/defs.rs
@@ -372,17 +372,17 @@ fn find_std_module(
 
 // FIXME: IdentClass as a name no longer fits
 #[derive(Debug)]
-pub enum IdentClass {
-    NameClass(NameClass),
-    NameRefClass(NameRefClass),
+pub enum IdentClass<'db> {
+    NameClass(NameClass<'db>),
+    NameRefClass(NameRefClass<'db>),
     Operator(OperatorClass),
 }
 
-impl IdentClass {
+impl<'db> IdentClass<'db> {
     pub fn classify_node(
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         node: &SyntaxNode,
-    ) -> Option<IdentClass> {
+    ) -> Option<IdentClass<'db>> {
         match_ast! {
             match node {
                 ast::Name(name) => NameClass::classify(sema, &name).map(IdentClass::NameClass),
@@ -405,23 +405,23 @@ impl IdentClass {
     }
 
     pub fn classify_token(
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         token: &SyntaxToken,
-    ) -> Option<IdentClass> {
+    ) -> Option<IdentClass<'db>> {
         let parent = token.parent()?;
         Self::classify_node(sema, &parent)
     }
 
     pub fn classify_lifetime(
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         lifetime: &ast::Lifetime,
-    ) -> Option<IdentClass> {
+    ) -> Option<IdentClass<'db>> {
         NameRefClass::classify_lifetime(sema, lifetime)
             .map(IdentClass::NameRefClass)
             .or_else(|| NameClass::classify_lifetime(sema, lifetime).map(IdentClass::NameClass))
     }
 
-    pub fn definitions(self) -> ArrayVec<(Definition, Option<GenericSubstitution>), 2> {
+    pub fn definitions(self) -> ArrayVec<(Definition, Option<GenericSubstitution<'db>>), 2> {
         let mut res = ArrayVec::new();
         match self {
             IdentClass::NameClass(NameClass::Definition(it) | NameClass::ConstReference(it)) => {
@@ -505,7 +505,7 @@ impl IdentClass {
 ///
 /// A model special case is `None` constant in pattern.
 #[derive(Debug)]
-pub enum NameClass {
+pub enum NameClass<'db> {
     Definition(Definition),
     /// `None` in `if let None = Some(82) {}`.
     /// Syntactically, it is a name, but semantically it is a reference.
@@ -515,11 +515,11 @@ pub enum NameClass {
     PatFieldShorthand {
         local_def: Local,
         field_ref: Field,
-        adt_subst: GenericSubstitution,
+        adt_subst: GenericSubstitution<'db>,
     },
 }
 
-impl NameClass {
+impl<'db> NameClass<'db> {
     /// `Definition` defined by this name.
     pub fn defined(self) -> Option<Definition> {
         let res = match self {
@@ -532,7 +532,10 @@ impl NameClass {
         Some(res)
     }
 
-    pub fn classify(sema: &Semantics<'_, RootDatabase>, name: &ast::Name) -> Option<NameClass> {
+    pub fn classify(
+        sema: &Semantics<'db, RootDatabase>,
+        name: &ast::Name,
+    ) -> Option<NameClass<'db>> {
         let _p = tracing::info_span!("NameClass::classify").entered();
 
         let parent = name.syntax().parent()?;
@@ -584,10 +587,10 @@ impl NameClass {
             Some(definition)
         }
 
-        fn classify_ident_pat(
-            sema: &Semantics<'_, RootDatabase>,
+        fn classify_ident_pat<'db>(
+            sema: &Semantics<'db, RootDatabase>,
             ident_pat: ast::IdentPat,
-        ) -> Option<NameClass> {
+        ) -> Option<NameClass<'db>> {
             if let Some(def) = sema.resolve_bind_pat_to_const(&ident_pat) {
                 return Some(NameClass::ConstReference(Definition::from(def)));
             }
@@ -625,9 +628,9 @@ impl NameClass {
     }
 
     pub fn classify_lifetime(
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         lifetime: &ast::Lifetime,
-    ) -> Option<NameClass> {
+    ) -> Option<NameClass<'db>> {
         let _p = tracing::info_span!("NameClass::classify_lifetime", ?lifetime).entered();
         let parent = lifetime.syntax().parent()?;
 
@@ -710,12 +713,12 @@ impl OperatorClass {
 /// A model special case is field shorthand syntax, which uses a single
 /// reference to point to two different defs.
 #[derive(Debug)]
-pub enum NameRefClass {
-    Definition(Definition, Option<GenericSubstitution>),
+pub enum NameRefClass<'db> {
+    Definition(Definition, Option<GenericSubstitution<'db>>),
     FieldShorthand {
         local_ref: Local,
         field_ref: Field,
-        adt_subst: GenericSubstitution,
+        adt_subst: GenericSubstitution<'db>,
     },
     /// The specific situation where we have an extern crate decl without a rename
     /// Here we have both a declaration and a reference.
@@ -728,13 +731,13 @@ pub enum NameRefClass {
     },
 }
 
-impl NameRefClass {
+impl<'db> NameRefClass<'db> {
     // Note: we don't have unit-tests for this rather important function.
     // It is primarily exercised via goto definition tests in `ide`.
     pub fn classify(
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         name_ref: &ast::NameRef,
-    ) -> Option<NameRefClass> {
+    ) -> Option<NameRefClass<'db>> {
         let _p = tracing::info_span!("NameRefClass::classify", ?name_ref).entered();
 
         let parent = name_ref.syntax().parent()?;
@@ -845,9 +848,9 @@ impl NameRefClass {
     }
 
     pub fn classify_lifetime(
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         lifetime: &ast::Lifetime,
-    ) -> Option<NameRefClass> {
+    ) -> Option<NameRefClass<'db>> {
         let _p = tracing::info_span!("NameRefClass::classify_lifetime", ?lifetime).entered();
         if lifetime.text() == "'static" {
             return Some(NameRefClass::Definition(
diff --git a/crates/ide-db/src/imports/import_assets.rs b/crates/ide-db/src/imports/import_assets.rs
index ac592dfe93cf..9f35988924b9 100644
--- a/crates/ide-db/src/imports/import_assets.rs
+++ b/crates/ide-db/src/imports/import_assets.rs
@@ -25,26 +25,26 @@ use crate::{
 /// * assists
 /// * etc.
 #[derive(Debug)]
-pub enum ImportCandidate {
+pub enum ImportCandidate<'db> {
     /// A path, qualified (`std::collections::HashMap`) or not (`HashMap`).
     Path(PathImportCandidate),
     /// A trait associated function (with no self parameter) or an associated constant.
     /// For 'test_mod::TestEnum::test_function', `ty` is the `test_mod::TestEnum` expression type
     /// and `name` is the `test_function`
-    TraitAssocItem(TraitImportCandidate),
+    TraitAssocItem(TraitImportCandidate<'db>),
     /// A trait method with self parameter.
     /// For 'test_enum.test_method()', `ty` is the `test_enum` expression type
     /// and `name` is the `test_method`
-    TraitMethod(TraitImportCandidate),
+    TraitMethod(TraitImportCandidate<'db>),
 }
 
 /// A trait import needed for a given associated item access.
 /// For `some::path::SomeStruct::ASSOC_`, contains the
 /// type of `some::path::SomeStruct` and `ASSOC_` as the item name.
 #[derive(Debug)]
-pub struct TraitImportCandidate {
+pub struct TraitImportCandidate<'db> {
     /// A type of the item that has the associated item accessed at.
-    pub receiver_ty: Type,
+    pub receiver_ty: Type<'db>,
     /// The associated item name that the trait to import should contain.
     pub assoc_item_name: NameToImport,
 }
@@ -100,16 +100,16 @@ impl NameToImport {
 
 /// A struct to find imports in the project, given a certain name (or its part) and the context.
 #[derive(Debug)]
-pub struct ImportAssets {
-    import_candidate: ImportCandidate,
+pub struct ImportAssets<'db> {
+    import_candidate: ImportCandidate<'db>,
     candidate_node: SyntaxNode,
     module_with_candidate: Module,
 }
 
-impl ImportAssets {
+impl<'db> ImportAssets<'db> {
     pub fn for_method_call(
         method_call: &ast::MethodCallExpr,
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
     ) -> Option<Self> {
         let candidate_node = method_call.syntax().clone();
         Some(Self {
@@ -121,7 +121,7 @@ impl ImportAssets {
 
     pub fn for_exact_path(
         fully_qualified_path: &ast::Path,
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
     ) -> Option<Self> {
         let candidate_node = fully_qualified_path.syntax().clone();
         if let Some(use_tree) = candidate_node.ancestors().find_map(ast::UseTree::cast) {
@@ -139,7 +139,7 @@ impl ImportAssets {
         })
     }
 
-    pub fn for_ident_pat(sema: &Semantics<'_, RootDatabase>, pat: &ast::IdentPat) -> Option<Self> {
+    pub fn for_ident_pat(sema: &Semantics<'db, RootDatabase>, pat: &ast::IdentPat) -> Option<Self> {
         if !pat.is_simple_ident() {
             return None;
         }
@@ -156,7 +156,7 @@ impl ImportAssets {
         module_with_candidate: Module,
         qualifier: Option<ast::Path>,
         fuzzy_name: String,
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         candidate_node: SyntaxNode,
     ) -> Option<Self> {
         Some(Self {
@@ -168,7 +168,7 @@ impl ImportAssets {
 
     pub fn for_fuzzy_method_call(
         module_with_method_call: Module,
-        receiver_ty: Type,
+        receiver_ty: Type<'db>,
         fuzzy_method_name: String,
         candidate_node: SyntaxNode,
     ) -> Option<Self> {
@@ -229,14 +229,14 @@ impl LocatedImport {
     }
 }
 
-impl ImportAssets {
-    pub fn import_candidate(&self) -> &ImportCandidate {
+impl<'db> ImportAssets<'db> {
+    pub fn import_candidate(&self) -> &ImportCandidate<'db> {
         &self.import_candidate
     }
 
     pub fn search_for_imports(
         &self,
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         cfg: ImportPathConfig,
         prefix_kind: PrefixKind,
     ) -> impl Iterator<Item = LocatedImport> {
@@ -247,7 +247,7 @@ impl ImportAssets {
     /// This may return non-absolute paths if a part of the returned path is already imported into scope.
     pub fn search_for_relative_paths(
         &self,
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         cfg: ImportPathConfig,
     ) -> impl Iterator<Item = LocatedImport> {
         let _p = tracing::info_span!("ImportAssets::search_for_relative_paths").entered();
@@ -286,7 +286,7 @@ impl ImportAssets {
 
     fn search_for(
         &self,
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         prefixed: Option<PrefixKind>,
         cfg: ImportPathConfig,
     ) -> impl Iterator<Item = LocatedImport> {
@@ -533,11 +533,11 @@ fn item_for_path_search_assoc(db: &RootDatabase, assoc_item: AssocItem) -> Optio
     })
 }
 
-fn trait_applicable_items(
-    db: &RootDatabase,
+fn trait_applicable_items<'db>(
+    db: &'db RootDatabase,
     current_crate: Crate,
-    scope: &SemanticsScope<'_>,
-    trait_candidate: &TraitImportCandidate,
+    scope: &SemanticsScope<'db>,
+    trait_candidate: &TraitImportCandidate<'db>,
     trait_assoc_item: bool,
     mod_path: impl Fn(ItemInNs) -> Option<ModPath>,
     scope_filter: impl Fn(hir::Trait) -> bool,
@@ -709,9 +709,9 @@ fn get_mod_path(
     }
 }
 
-impl ImportCandidate {
+impl<'db> ImportCandidate<'db> {
     fn for_method_call(
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
         method_call: &ast::MethodCallExpr,
     ) -> Option<Self> {
         match sema.resolve_method_call(method_call) {
@@ -725,7 +725,7 @@ impl ImportCandidate {
         }
     }
 
-    fn for_regular_path(sema: &Semantics<'_, RootDatabase>, path: &ast::Path) -> Option<Self> {
+    fn for_regular_path(sema: &Semantics<'db, RootDatabase>, path: &ast::Path) -> Option<Self> {
         if sema.resolve_path(path).is_some() {
             return None;
         }
@@ -736,7 +736,7 @@ impl ImportCandidate {
         )
     }
 
-    fn for_name(sema: &Semantics<'_, RootDatabase>, name: &ast::Name) -> Option<Self> {
+    fn for_name(sema: &Semantics<'db, RootDatabase>, name: &ast::Name) -> Option<Self> {
         if sema
             .scope(name.syntax())?
             .speculative_resolve(&make::ext::ident_path(&name.text()))
@@ -753,17 +753,17 @@ impl ImportCandidate {
     fn for_fuzzy_path(
         qualifier: Option<ast::Path>,
         fuzzy_name: String,
-        sema: &Semantics<'_, RootDatabase>,
+        sema: &Semantics<'db, RootDatabase>,
     ) -> Option<Self> {
         path_import_candidate(sema, qualifier, NameToImport::fuzzy(fuzzy_name))
     }
 }
 
-fn path_import_candidate(
-    sema: &Semantics<'_, RootDatabase>,
+fn path_import_candidate<'db>(
+    sema: &Semantics<'db, RootDatabase>,
     qualifier: Option<ast::Path>,
     name: NameToImport,
-) -> Option<ImportCandidate> {
+) -> Option<ImportCandidate<'db>> {
     Some(match qualifier {
         Some(qualifier) => match sema.resolve_path(&qualifier) {
             Some(PathResolution::Def(ModuleDef::BuiltinType(_))) | None => {
diff --git a/crates/ide-db/src/search.rs b/crates/ide-db/src/search.rs
index bb4bee91bbe8..63a2ce4e429d 100644
--- a/crates/ide-db/src/search.rs
+++ b/crates/ide-db/src/search.rs
@@ -430,7 +430,7 @@ pub struct FindUsages<'a> {
     /// The container of our definition should it be an assoc item
     assoc_item_container: Option<hir::AssocItemContainer>,
     /// whether to search for the `Self` type of the definition
-    include_self_kw_refs: Option<hir::Type>,
+    include_self_kw_refs: Option<hir::Type<'a>>,
     /// whether to search for the `self` module
     search_self_mod: bool,
 }
@@ -1086,12 +1086,12 @@ impl<'a> FindUsages<'a> {
 
     fn found_self_ty_name_ref(
         &self,
-        self_ty: &hir::Type,
+        self_ty: &hir::Type<'_>,
         name_ref: &ast::NameRef,
         sink: &mut dyn FnMut(EditionedFileId, FileReference) -> bool,
     ) -> bool {
         // See https://github.com/rust-lang/rust-analyzer/pull/15864/files/e0276dc5ddc38c65240edb408522bb869f15afb4#r1389848845
-        let ty_eq = |ty: hir::Type| match (ty.as_adt(), self_ty.as_adt()) {
+        let ty_eq = |ty: hir::Type<'_>| match (ty.as_adt(), self_ty.as_adt()) {
             (Some(ty), Some(self_ty)) => ty == self_ty,
             (None, None) => ty == *self_ty,
             _ => false,
@@ -1314,7 +1314,7 @@ impl<'a> FindUsages<'a> {
     }
 }
 
-fn def_to_ty(sema: &Semantics<'_, RootDatabase>, def: &Definition) -> Option<hir::Type> {
+fn def_to_ty<'db>(sema: &Semantics<'db, RootDatabase>, def: &Definition) -> Option<hir::Type<'db>> {
     match def {
         Definition::Adt(adt) => Some(adt.ty(sema.db)),
         Definition::TypeAlias(it) => Some(it.ty(sema.db)),
diff --git a/crates/ide-db/src/syntax_helpers/suggest_name.rs b/crates/ide-db/src/syntax_helpers/suggest_name.rs
index 51ce9b482935..20146cb5c755 100644
--- a/crates/ide-db/src/syntax_helpers/suggest_name.rs
+++ b/crates/ide-db/src/syntax_helpers/suggest_name.rs
@@ -151,10 +151,10 @@ impl NameGenerator {
     /// - If `ty` is an `impl Trait`, it will suggest the name of the first trait.
     ///
     /// If the suggested name conflicts with reserved keywords, it will return `None`.
-    pub fn for_type(
+    pub fn for_type<'db>(
         &mut self,
-        ty: &hir::Type,
-        db: &RootDatabase,
+        ty: &hir::Type<'db>,
+        db: &'db RootDatabase,
         edition: Edition,
     ) -> Option<SmolStr> {
         let name = name_of_type(ty, db, edition)?;
@@ -373,7 +373,11 @@ fn from_type(expr: &ast::Expr, sema: &Semantics<'_, RootDatabase>) -> Option<Smo
     name_of_type(&ty, sema.db, edition)
 }
 
-fn name_of_type(ty: &hir::Type, db: &RootDatabase, edition: Edition) -> Option<SmolStr> {
+fn name_of_type<'db>(
+    ty: &hir::Type<'db>,
+    db: &'db RootDatabase,
+    edition: Edition,
+) -> Option<SmolStr> {
     let name = if let Some(adt) = ty.as_adt() {
         let name = adt.name(db).display(db, edition).to_string();
 
@@ -407,7 +411,11 @@ fn name_of_type(ty: &hir::Type, db: &RootDatabase, edition: Edition) -> Option<S
     normalize(&name)
 }
 
-fn sequence_name(inner_ty: Option<&hir::Type>, db: &RootDatabase, edition: Edition) -> SmolStr {
+fn sequence_name<'db>(
+    inner_ty: Option<&hir::Type<'db>>,
+    db: &'db RootDatabase,
+    edition: Edition,
+) -> SmolStr {
     let items_str = SmolStr::new_static("items");
     let Some(inner_ty) = inner_ty else {
         return items_str;
diff --git a/crates/ide-db/src/ty_filter.rs b/crates/ide-db/src/ty_filter.rs
index 63ce0ddbb8fc..e8f2fbc9eb94 100644
--- a/crates/ide-db/src/ty_filter.rs
+++ b/crates/ide-db/src/ty_filter.rs
@@ -20,7 +20,7 @@ impl TryEnum {
     const ALL: [TryEnum; 2] = [TryEnum::Option, TryEnum::Result];
 
     /// Returns `Some(..)` if the provided type is an enum that implements `std::ops::Try`.
-    pub fn from_ty(sema: &Semantics<'_, RootDatabase>, ty: &hir::Type) -> Option<TryEnum> {
+    pub fn from_ty(sema: &Semantics<'_, RootDatabase>, ty: &hir::Type<'_>) -> Option<TryEnum> {
         let enum_ = match ty.as_adt() {
             Some(hir::Adt::Enum(it)) => it,
             _ => return None,
diff --git a/crates/ide-db/src/use_trivial_constructor.rs b/crates/ide-db/src/use_trivial_constructor.rs
index a4a93e36f0e1..f63cd92694b3 100644
--- a/crates/ide-db/src/use_trivial_constructor.rs
+++ b/crates/ide-db/src/use_trivial_constructor.rs
@@ -11,7 +11,7 @@ use syntax::{
 pub fn use_trivial_constructor(
     db: &crate::RootDatabase,
     path: Path,
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
     edition: Edition,
 ) -> Option<Expr> {
     match ty.as_adt() {
diff --git a/crates/ide-diagnostics/src/handlers/expected_function.rs b/crates/ide-diagnostics/src/handlers/expected_function.rs
index af25c2b2e332..4811cd7019dc 100644
--- a/crates/ide-diagnostics/src/handlers/expected_function.rs
+++ b/crates/ide-diagnostics/src/handlers/expected_function.rs
@@ -7,7 +7,7 @@ use crate::{Diagnostic, DiagnosticCode, DiagnosticsContext};
 // This diagnostic is triggered if a call is made on something that is not callable.
 pub(crate) fn expected_function(
     ctx: &DiagnosticsContext<'_>,
-    d: &hir::ExpectedFunction,
+    d: &hir::ExpectedFunction<'_>,
 ) -> Diagnostic {
     Diagnostic::new_with_syntax_node_ptr(
         ctx,
diff --git a/crates/ide-diagnostics/src/handlers/invalid_cast.rs b/crates/ide-diagnostics/src/handlers/invalid_cast.rs
index 82cd1f2fde6d..c292d9e7a9fd 100644
--- a/crates/ide-diagnostics/src/handlers/invalid_cast.rs
+++ b/crates/ide-diagnostics/src/handlers/invalid_cast.rs
@@ -18,7 +18,7 @@ macro_rules! format_ty {
 // Diagnostic: invalid-cast
 //
 // This diagnostic is triggered if the code contains an illegal cast
-pub(crate) fn invalid_cast(ctx: &DiagnosticsContext<'_>, d: &hir::InvalidCast) -> Diagnostic {
+pub(crate) fn invalid_cast(ctx: &DiagnosticsContext<'_>, d: &hir::InvalidCast<'_>) -> Diagnostic {
     let display_range = ctx.sema.diagnostics_display_range(d.expr.map(|it| it.into()));
     let (code, message) = match d.error {
         CastError::CastToBool => (
@@ -106,7 +106,10 @@ pub(crate) fn invalid_cast(ctx: &DiagnosticsContext<'_>, d: &hir::InvalidCast) -
 // Diagnostic: cast-to-unsized
 //
 // This diagnostic is triggered when casting to an unsized type
-pub(crate) fn cast_to_unsized(ctx: &DiagnosticsContext<'_>, d: &hir::CastToUnsized) -> Diagnostic {
+pub(crate) fn cast_to_unsized(
+    ctx: &DiagnosticsContext<'_>,
+    d: &hir::CastToUnsized<'_>,
+) -> Diagnostic {
     let display_range = ctx.sema.diagnostics_display_range(d.expr.map(|it| it.into()));
     Diagnostic::new(
         DiagnosticCode::RustcHardError("E0620"),
diff --git a/crates/ide-diagnostics/src/handlers/missing_fields.rs b/crates/ide-diagnostics/src/handlers/missing_fields.rs
index ac68f4186cc5..a9fd7c38620a 100644
--- a/crates/ide-diagnostics/src/handlers/missing_fields.rs
+++ b/crates/ide-diagnostics/src/handlers/missing_fields.rs
@@ -101,7 +101,7 @@ fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::MissingFields) -> Option<Vec<Ass
                 }
             });
 
-            let generate_fill_expr = |ty: &Type| match ctx.config.expr_fill_default {
+            let generate_fill_expr = |ty: &Type<'_>| match ctx.config.expr_fill_default {
                 crate::ExprFillDefaultMode::Todo => make::ext::expr_todo(),
                 crate::ExprFillDefaultMode::Default => {
                     get_default_constructor(ctx, d, ty).unwrap_or_else(make::ext::expr_todo)
@@ -169,7 +169,7 @@ fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::MissingFields) -> Option<Vec<Ass
 }
 
 fn make_ty(
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
     db: &dyn HirDatabase,
     module: hir::Module,
     edition: Edition,
@@ -187,7 +187,7 @@ fn make_ty(
 fn get_default_constructor(
     ctx: &DiagnosticsContext<'_>,
     d: &hir::MissingFields,
-    ty: &Type,
+    ty: &Type<'_>,
 ) -> Option<ast::Expr> {
     if let Some(builtin_ty) = ty.as_builtin() {
         if builtin_ty.is_int() || builtin_ty.is_uint() {
diff --git a/crates/ide-diagnostics/src/handlers/moved_out_of_ref.rs b/crates/ide-diagnostics/src/handlers/moved_out_of_ref.rs
index 7d0f10983d73..dd8bd863e0d3 100644
--- a/crates/ide-diagnostics/src/handlers/moved_out_of_ref.rs
+++ b/crates/ide-diagnostics/src/handlers/moved_out_of_ref.rs
@@ -4,7 +4,10 @@ use hir::HirDisplay;
 // Diagnostic: moved-out-of-ref
 //
 // This diagnostic is triggered on moving non copy things out of references.
-pub(crate) fn moved_out_of_ref(ctx: &DiagnosticsContext<'_>, d: &hir::MovedOutOfRef) -> Diagnostic {
+pub(crate) fn moved_out_of_ref(
+    ctx: &DiagnosticsContext<'_>,
+    d: &hir::MovedOutOfRef<'_>,
+) -> Diagnostic {
     Diagnostic::new_with_syntax_node_ptr(
         ctx,
         DiagnosticCode::RustcHardError("E0507"),
diff --git a/crates/ide-diagnostics/src/handlers/type_mismatch.rs b/crates/ide-diagnostics/src/handlers/type_mismatch.rs
index 591213d9838c..156b6bedb4d8 100644
--- a/crates/ide-diagnostics/src/handlers/type_mismatch.rs
+++ b/crates/ide-diagnostics/src/handlers/type_mismatch.rs
@@ -20,7 +20,7 @@ use crate::{Assist, Diagnostic, DiagnosticCode, DiagnosticsContext, adjusted_dis
 //
 // This diagnostic is triggered when the type of an expression or pattern does not match
 // the expected type.
-pub(crate) fn type_mismatch(ctx: &DiagnosticsContext<'_>, d: &hir::TypeMismatch) -> Diagnostic {
+pub(crate) fn type_mismatch(ctx: &DiagnosticsContext<'_>, d: &hir::TypeMismatch<'_>) -> Diagnostic {
     let display_range = adjusted_display_range(ctx, d.expr_or_pat, &|node| {
         let Either::Left(expr) = node else { return None };
         let salient_token_range = match expr {
@@ -59,7 +59,7 @@ pub(crate) fn type_mismatch(ctx: &DiagnosticsContext<'_>, d: &hir::TypeMismatch)
     diag
 }
 
-fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::TypeMismatch) -> Option<Vec<Assist>> {
+fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::TypeMismatch<'_>) -> Option<Vec<Assist>> {
     let mut fixes = Vec::new();
 
     if let Some(expr_ptr) = d.expr_or_pat.value.cast::<ast::Expr>() {
@@ -76,7 +76,7 @@ fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::TypeMismatch) -> Option<Vec<Assi
 
 fn add_reference(
     ctx: &DiagnosticsContext<'_>,
-    d: &hir::TypeMismatch,
+    d: &hir::TypeMismatch<'_>,
     expr_ptr: &InFile<AstPtr<ast::Expr>>,
     acc: &mut Vec<Assist>,
 ) -> Option<()> {
@@ -98,7 +98,7 @@ fn add_reference(
 
 fn add_missing_ok_or_some(
     ctx: &DiagnosticsContext<'_>,
-    d: &hir::TypeMismatch,
+    d: &hir::TypeMismatch<'_>,
     expr_ptr: &InFile<AstPtr<ast::Expr>>,
     acc: &mut Vec<Assist>,
 ) -> Option<()> {
@@ -186,7 +186,7 @@ fn add_missing_ok_or_some(
 
 fn remove_unnecessary_wrapper(
     ctx: &DiagnosticsContext<'_>,
-    d: &hir::TypeMismatch,
+    d: &hir::TypeMismatch<'_>,
     expr_ptr: &InFile<AstPtr<ast::Expr>>,
     acc: &mut Vec<Assist>,
 ) -> Option<()> {
@@ -269,7 +269,7 @@ fn remove_unnecessary_wrapper(
 
 fn remove_semicolon(
     ctx: &DiagnosticsContext<'_>,
-    d: &hir::TypeMismatch,
+    d: &hir::TypeMismatch<'_>,
     expr_ptr: &InFile<AstPtr<ast::Expr>>,
     acc: &mut Vec<Assist>,
 ) -> Option<()> {
@@ -297,7 +297,7 @@ fn remove_semicolon(
 
 fn str_ref_to_owned(
     ctx: &DiagnosticsContext<'_>,
-    d: &hir::TypeMismatch,
+    d: &hir::TypeMismatch<'_>,
     expr_ptr: &InFile<AstPtr<ast::Expr>>,
     acc: &mut Vec<Assist>,
 ) -> Option<()> {
diff --git a/crates/ide-diagnostics/src/handlers/typed_hole.rs b/crates/ide-diagnostics/src/handlers/typed_hole.rs
index 0bef91f3375e..88162738154f 100644
--- a/crates/ide-diagnostics/src/handlers/typed_hole.rs
+++ b/crates/ide-diagnostics/src/handlers/typed_hole.rs
@@ -18,7 +18,7 @@ use syntax::AstNode;
 // Diagnostic: typed-hole
 //
 // This diagnostic is triggered when an underscore expression is used in an invalid position.
-pub(crate) fn typed_hole(ctx: &DiagnosticsContext<'_>, d: &hir::TypedHole) -> Diagnostic {
+pub(crate) fn typed_hole(ctx: &DiagnosticsContext<'_>, d: &hir::TypedHole<'_>) -> Diagnostic {
     let display_range = ctx.sema.diagnostics_display_range(d.expr.map(|it| it.into()));
     let (message, fixes) = if d.expected.is_unknown() {
         ("`_` expressions may only appear on the left-hand side of an assignment".to_owned(), None)
@@ -38,7 +38,7 @@ pub(crate) fn typed_hole(ctx: &DiagnosticsContext<'_>, d: &hir::TypedHole) -> Di
         .with_fixes(fixes)
 }
 
-fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::TypedHole) -> Option<Vec<Assist>> {
+fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::TypedHole<'_>) -> Option<Vec<Assist>> {
     let db = ctx.sema.db;
     let root = db.parse_or_expand(d.expr.file_id);
     let (original_range, _) =
@@ -58,7 +58,7 @@ fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::TypedHole) -> Option<Vec<Assist>
     };
     let paths = term_search(&term_search_ctx);
 
-    let mut formatter = |_: &hir::Type| String::from("_");
+    let mut formatter = |_: &hir::Type<'_>| String::from("_");
 
     let assists: Vec<Assist> = paths
         .into_iter()
diff --git a/crates/ide-diagnostics/src/handlers/unresolved_field.rs b/crates/ide-diagnostics/src/handlers/unresolved_field.rs
index 986ebb8818f4..8a3c6ab80ca2 100644
--- a/crates/ide-diagnostics/src/handlers/unresolved_field.rs
+++ b/crates/ide-diagnostics/src/handlers/unresolved_field.rs
@@ -25,7 +25,7 @@ use crate::{Diagnostic, DiagnosticCode, DiagnosticsContext, adjusted_display_ran
 // This diagnostic is triggered if a field does not exist on a given type.
 pub(crate) fn unresolved_field(
     ctx: &DiagnosticsContext<'_>,
-    d: &hir::UnresolvedField,
+    d: &hir::UnresolvedField<'_>,
 ) -> Diagnostic {
     let method_suffix = if d.method_with_same_name_exists {
         ", but a method with a similar name exists"
@@ -55,7 +55,7 @@ pub(crate) fn unresolved_field(
     .experimental()
 }
 
-fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedField) -> Option<Vec<Assist>> {
+fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedField<'_>) -> Option<Vec<Assist>> {
     let mut fixes = Vec::new();
     if d.method_with_same_name_exists {
         fixes.extend(method_fix(ctx, &d.expr));
@@ -65,7 +65,7 @@ fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedField) -> Option<Vec<A
 }
 
 // FIXME: Add Snippet Support
-fn field_fix(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedField) -> Option<Assist> {
+fn field_fix(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedField<'_>) -> Option<Assist> {
     // Get the FileRange of the invalid field access
     let root = ctx.sema.db.parse_or_expand(d.expr.file_id);
     let expr = d.expr.value.to_node(&root).left()?;
diff --git a/crates/ide-diagnostics/src/handlers/unresolved_method.rs b/crates/ide-diagnostics/src/handlers/unresolved_method.rs
index b5d7aa113a10..da35fbba6ca5 100644
--- a/crates/ide-diagnostics/src/handlers/unresolved_method.rs
+++ b/crates/ide-diagnostics/src/handlers/unresolved_method.rs
@@ -18,7 +18,7 @@ use crate::{Diagnostic, DiagnosticCode, DiagnosticsContext, adjusted_display_ran
 // This diagnostic is triggered if a method does not exist on a given type.
 pub(crate) fn unresolved_method(
     ctx: &DiagnosticsContext<'_>,
-    d: &hir::UnresolvedMethodCall,
+    d: &hir::UnresolvedMethodCall<'_>,
 ) -> Diagnostic {
     let suffix = if d.field_with_same_name.is_some() {
         ", but a field with a similar name exists"
@@ -50,7 +50,7 @@ pub(crate) fn unresolved_method(
     .experimental()
 }
 
-fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedMethodCall) -> Option<Vec<Assist>> {
+fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedMethodCall<'_>) -> Option<Vec<Assist>> {
     let field_fix = if let Some(ty) = &d.field_with_same_name {
         field_fix(ctx, d, ty)
     } else {
@@ -73,8 +73,8 @@ fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedMethodCall) -> Option<
 
 fn field_fix(
     ctx: &DiagnosticsContext<'_>,
-    d: &hir::UnresolvedMethodCall,
-    ty: &hir::Type,
+    d: &hir::UnresolvedMethodCall<'_>,
+    ty: &hir::Type<'_>,
 ) -> Option<Assist> {
     if !ty.impls_fnonce(ctx.sema.db) {
         return None;
@@ -108,7 +108,10 @@ fn field_fix(
     })
 }
 
-fn assoc_func_fix(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedMethodCall) -> Option<Assist> {
+fn assoc_func_fix(
+    ctx: &DiagnosticsContext<'_>,
+    d: &hir::UnresolvedMethodCall<'_>,
+) -> Option<Assist> {
     if let Some(f) = d.assoc_func_with_same_name {
         let db = ctx.sema.db;
 
diff --git a/crates/ide-ssr/src/lib.rs b/crates/ide-ssr/src/lib.rs
index 757c77b67371..3ff82efddeca 100644
--- a/crates/ide-ssr/src/lib.rs
+++ b/crates/ide-ssr/src/lib.rs
@@ -113,7 +113,7 @@ pub struct SsrMatches {
 pub struct MatchFinder<'db> {
     /// Our source of information about the user's code.
     sema: Semantics<'db, ide_db::RootDatabase>,
-    rules: Vec<ResolvedRule>,
+    rules: Vec<ResolvedRule<'db>>,
     resolution_scope: resolving::ResolutionScope<'db>,
     restrict_ranges: Vec<ide_db::FileRange>,
 }
diff --git a/crates/ide-ssr/src/matching.rs b/crates/ide-ssr/src/matching.rs
index 84a5943b1ce2..d59ebdda9a3b 100644
--- a/crates/ide-ssr/src/matching.rs
+++ b/crates/ide-ssr/src/matching.rs
@@ -84,12 +84,12 @@ pub(crate) struct MatchFailed {
 /// Checks if `code` matches the search pattern found in `search_scope`, returning information about
 /// the match, if it does. Since we only do matching in this module and searching is done by the
 /// parent module, we don't populate nested matches.
-pub(crate) fn get_match(
+pub(crate) fn get_match<'db>(
     debug_active: bool,
-    rule: &ResolvedRule,
+    rule: &ResolvedRule<'db>,
     code: &SyntaxNode,
     restrict_range: &Option<FileRange>,
-    sema: &Semantics<'_, ide_db::RootDatabase>,
+    sema: &Semantics<'db, ide_db::RootDatabase>,
 ) -> Result<Match, MatchFailed> {
     record_match_fails_reasons_scope(debug_active, || {
         Matcher::try_match(rule, code, restrict_range, sema)
@@ -102,7 +102,7 @@ struct Matcher<'db, 'sema> {
     /// If any placeholders come from anywhere outside of this range, then the match will be
     /// rejected.
     restrict_range: Option<FileRange>,
-    rule: &'sema ResolvedRule,
+    rule: &'sema ResolvedRule<'db>,
 }
 
 /// Which phase of matching we're currently performing. We do two phases because most attempted
@@ -117,7 +117,7 @@ enum Phase<'a> {
 
 impl<'db, 'sema> Matcher<'db, 'sema> {
     fn try_match(
-        rule: &ResolvedRule,
+        rule: &ResolvedRule<'db>,
         code: &SyntaxNode,
         restrict_range: &Option<FileRange>,
         sema: &'sema Semantics<'db, ide_db::RootDatabase>,
@@ -535,7 +535,7 @@ impl<'db, 'sema> Matcher<'db, 'sema> {
     fn attempt_match_ufcs_to_method_call(
         &self,
         phase: &mut Phase<'_>,
-        pattern_ufcs: &UfcsCallInfo,
+        pattern_ufcs: &UfcsCallInfo<'db>,
         code: &ast::MethodCallExpr,
     ) -> Result<(), MatchFailed> {
         use ast::HasArgList;
@@ -597,7 +597,7 @@ impl<'db, 'sema> Matcher<'db, 'sema> {
     fn attempt_match_ufcs_to_ufcs(
         &self,
         phase: &mut Phase<'_>,
-        pattern_ufcs: &UfcsCallInfo,
+        pattern_ufcs: &UfcsCallInfo<'db>,
         code: &ast::CallExpr,
     ) -> Result<(), MatchFailed> {
         use ast::HasArgList;
@@ -615,7 +615,7 @@ impl<'db, 'sema> Matcher<'db, 'sema> {
     /// times. Returns the number of times it needed to be dereferenced.
     fn check_expr_type(
         &self,
-        pattern_type: &hir::Type,
+        pattern_type: &hir::Type<'db>,
         expr: &ast::Expr,
     ) -> Result<usize, MatchFailed> {
         use hir::HirDisplay;
@@ -656,10 +656,10 @@ impl<'db, 'sema> Matcher<'db, 'sema> {
 }
 
 impl Match {
-    fn render_template_paths(
+    fn render_template_paths<'db>(
         &mut self,
-        template: &ResolvedPattern,
-        sema: &Semantics<'_, ide_db::RootDatabase>,
+        template: &ResolvedPattern<'db>,
+        sema: &Semantics<'db, ide_db::RootDatabase>,
     ) -> Result<(), MatchFailed> {
         let module = sema
             .scope(&self.matched_node)
diff --git a/crates/ide-ssr/src/replacing.rs b/crates/ide-ssr/src/replacing.rs
index 2ad562f2427a..8ab3c5136647 100644
--- a/crates/ide-ssr/src/replacing.rs
+++ b/crates/ide-ssr/src/replacing.rs
@@ -14,21 +14,21 @@ use crate::{Match, SsrMatches, fragments, resolving::ResolvedRule};
 /// Returns a text edit that will replace each match in `matches` with its corresponding replacement
 /// template. Placeholders in the template will have been substituted with whatever they matched to
 /// in the original code.
-pub(crate) fn matches_to_edit(
-    db: &dyn hir::db::ExpandDatabase,
+pub(crate) fn matches_to_edit<'db>(
+    db: &'db dyn hir::db::ExpandDatabase,
     matches: &SsrMatches,
     file_src: &str,
-    rules: &[ResolvedRule],
+    rules: &[ResolvedRule<'db>],
 ) -> TextEdit {
     matches_to_edit_at_offset(db, matches, file_src, 0.into(), rules)
 }
 
-fn matches_to_edit_at_offset(
-    db: &dyn hir::db::ExpandDatabase,
+fn matches_to_edit_at_offset<'db>(
+    db: &'db dyn hir::db::ExpandDatabase,
     matches: &SsrMatches,
     file_src: &str,
     relative_start: TextSize,
-    rules: &[ResolvedRule],
+    rules: &[ResolvedRule<'db>],
 ) -> TextEdit {
     let mut edit_builder = TextEdit::builder();
     for m in &matches.matches {
@@ -40,12 +40,12 @@ fn matches_to_edit_at_offset(
     edit_builder.finish()
 }
 
-struct ReplacementRenderer<'a> {
-    db: &'a dyn hir::db::ExpandDatabase,
+struct ReplacementRenderer<'a, 'db> {
+    db: &'db dyn hir::db::ExpandDatabase,
     match_info: &'a Match,
     file_src: &'a str,
-    rules: &'a [ResolvedRule],
-    rule: &'a ResolvedRule,
+    rules: &'a [ResolvedRule<'db>],
+    rule: &'a ResolvedRule<'db>,
     out: String,
     // Map from a range within `out` to a token in `template` that represents a placeholder. This is
     // used to validate that the generated source code doesn't split any placeholder expansions (see
@@ -58,11 +58,11 @@ struct ReplacementRenderer<'a> {
     edition: Edition,
 }
 
-fn render_replace(
-    db: &dyn hir::db::ExpandDatabase,
+fn render_replace<'db>(
+    db: &'db dyn hir::db::ExpandDatabase,
     match_info: &Match,
     file_src: &str,
-    rules: &[ResolvedRule],
+    rules: &[ResolvedRule<'db>],
     edition: Edition,
 ) -> String {
     let rule = &rules[match_info.rule_index];
@@ -89,7 +89,7 @@ fn render_replace(
     renderer.out
 }
 
-impl ReplacementRenderer<'_> {
+impl<'db> ReplacementRenderer<'_, 'db> {
     fn render_node_children(&mut self, node: &SyntaxNode) {
         for node_or_token in node.children_with_tokens() {
             self.render_node_or_token(&node_or_token);
diff --git a/crates/ide-ssr/src/resolving.rs b/crates/ide-ssr/src/resolving.rs
index ba6d981b8c15..5ed495b13cab 100644
--- a/crates/ide-ssr/src/resolving.rs
+++ b/crates/ide-ssr/src/resolving.rs
@@ -15,18 +15,18 @@ pub(crate) struct ResolutionScope<'db> {
     node: SyntaxNode,
 }
 
-pub(crate) struct ResolvedRule {
-    pub(crate) pattern: ResolvedPattern,
-    pub(crate) template: Option<ResolvedPattern>,
+pub(crate) struct ResolvedRule<'db> {
+    pub(crate) pattern: ResolvedPattern<'db>,
+    pub(crate) template: Option<ResolvedPattern<'db>>,
     pub(crate) index: usize,
 }
 
-pub(crate) struct ResolvedPattern {
+pub(crate) struct ResolvedPattern<'db> {
     pub(crate) placeholders_by_stand_in: FxHashMap<SmolStr, parsing::Placeholder>,
     pub(crate) node: SyntaxNode,
     // Paths in `node` that we've resolved.
     pub(crate) resolved_paths: FxHashMap<SyntaxNode, ResolvedPath>,
-    pub(crate) ufcs_function_calls: FxHashMap<SyntaxNode, UfcsCallInfo>,
+    pub(crate) ufcs_function_calls: FxHashMap<SyntaxNode, UfcsCallInfo<'db>>,
     pub(crate) contains_self: bool,
 }
 
@@ -36,18 +36,18 @@ pub(crate) struct ResolvedPath {
     pub(crate) depth: u32,
 }
 
-pub(crate) struct UfcsCallInfo {
+pub(crate) struct UfcsCallInfo<'db> {
     pub(crate) call_expr: ast::CallExpr,
     pub(crate) function: hir::Function,
-    pub(crate) qualifier_type: Option<hir::Type>,
+    pub(crate) qualifier_type: Option<hir::Type<'db>>,
 }
 
-impl ResolvedRule {
+impl<'db> ResolvedRule<'db> {
     pub(crate) fn new(
         rule: parsing::ParsedRule,
-        resolution_scope: &ResolutionScope<'_>,
+        resolution_scope: &ResolutionScope<'db>,
         index: usize,
-    ) -> Result<ResolvedRule, SsrError> {
+    ) -> Result<ResolvedRule<'db>, SsrError> {
         let resolver =
             Resolver { resolution_scope, placeholders_by_stand_in: rule.placeholders_by_stand_in };
         let resolved_template = match rule.template {
@@ -74,8 +74,8 @@ struct Resolver<'a, 'db> {
     placeholders_by_stand_in: FxHashMap<SmolStr, parsing::Placeholder>,
 }
 
-impl Resolver<'_, '_> {
-    fn resolve_pattern_tree(&self, pattern: SyntaxNode) -> Result<ResolvedPattern, SsrError> {
+impl<'db> Resolver<'_, 'db> {
+    fn resolve_pattern_tree(&self, pattern: SyntaxNode) -> Result<ResolvedPattern<'db>, SsrError> {
         use syntax::ast::AstNode;
         use syntax::{SyntaxElement, T};
         let mut resolved_paths = FxHashMap::default();
@@ -255,7 +255,7 @@ impl<'db> ResolutionScope<'db> {
         }
     }
 
-    fn qualifier_type(&self, path: &SyntaxNode) -> Option<hir::Type> {
+    fn qualifier_type(&self, path: &SyntaxNode) -> Option<hir::Type<'db>> {
         use syntax::ast::AstNode;
         if let Some(path) = ast::Path::cast(path.clone()) {
             if let Some(qualifier) = path.qualifier() {
diff --git a/crates/ide-ssr/src/search.rs b/crates/ide-ssr/src/search.rs
index 73dbefb51b22..18332842ae38 100644
--- a/crates/ide-ssr/src/search.rs
+++ b/crates/ide-ssr/src/search.rs
@@ -22,13 +22,13 @@ pub(crate) struct UsageCache {
     usages: Vec<(Definition, UsageSearchResult)>,
 }
 
-impl MatchFinder<'_> {
+impl<'db> MatchFinder<'db> {
     /// Adds all matches for `rule` to `matches_out`. Matches may overlap in ways that make
     /// replacement impossible, so further processing is required in order to properly nest matches
     /// and remove overlapping matches. This is done in the `nesting` module.
     pub(crate) fn find_matches_for_rule(
         &self,
-        rule: &ResolvedRule,
+        rule: &ResolvedRule<'db>,
         usage_cache: &mut UsageCache,
         matches_out: &mut Vec<Match>,
     ) {
@@ -50,8 +50,8 @@ impl MatchFinder<'_> {
 
     fn find_matches_for_pattern_tree(
         &self,
-        rule: &ResolvedRule,
-        pattern: &ResolvedPattern,
+        rule: &ResolvedRule<'db>,
+        pattern: &ResolvedPattern<'db>,
         usage_cache: &mut UsageCache,
         matches_out: &mut Vec<Match>,
     ) {
@@ -150,7 +150,7 @@ impl MatchFinder<'_> {
         SearchScope::files(&files)
     }
 
-    fn slow_scan(&self, rule: &ResolvedRule, matches_out: &mut Vec<Match>) {
+    fn slow_scan(&self, rule: &ResolvedRule<'db>, matches_out: &mut Vec<Match>) {
         self.search_files_do(|file_id| {
             let file = self.sema.parse_guess_edition(file_id);
             let code = file.syntax();
@@ -183,7 +183,7 @@ impl MatchFinder<'_> {
     fn slow_scan_node(
         &self,
         code: &SyntaxNode,
-        rule: &ResolvedRule,
+        rule: &ResolvedRule<'db>,
         restrict_range: &Option<FileRange>,
         matches_out: &mut Vec<Match>,
     ) {
@@ -212,7 +212,7 @@ impl MatchFinder<'_> {
 
     fn try_add_match(
         &self,
-        rule: &ResolvedRule,
+        rule: &ResolvedRule<'db>,
         code: &SyntaxNode,
         restrict_range: &Option<FileRange>,
         matches_out: &mut Vec<Match>,
@@ -278,7 +278,7 @@ impl UsageCache {
 /// Returns a path that's suitable for path resolution. We exclude builtin types, since they aren't
 /// something that we can find references to. We then somewhat arbitrarily pick the path that is the
 /// longest as this is hopefully more likely to be less common, making it faster to find.
-fn pick_path_for_usages(pattern: &ResolvedPattern) -> Option<&ResolvedPath> {
+fn pick_path_for_usages<'a>(pattern: &'a ResolvedPattern<'_>) -> Option<&'a ResolvedPath> {
     // FIXME: Take the scope of the resolved path into account. e.g. if there are any paths that are
     // private to the current module, then we definitely would want to pick them over say a path
     // from std. Possibly we should go further than this and intersect the search scopes for all
diff --git a/crates/ide/src/goto_implementation.rs b/crates/ide/src/goto_implementation.rs
index 1bc28f28b6f5..02d96a647328 100644
--- a/crates/ide/src/goto_implementation.rs
+++ b/crates/ide/src/goto_implementation.rs
@@ -83,7 +83,7 @@ pub(crate) fn goto_implementation(
     Some(RangeInfo { range, info: navs })
 }
 
-fn impls_for_ty(sema: &Semantics<'_, RootDatabase>, ty: hir::Type) -> Vec<NavigationTarget> {
+fn impls_for_ty(sema: &Semantics<'_, RootDatabase>, ty: hir::Type<'_>) -> Vec<NavigationTarget> {
     Impl::all_for_type(sema.db, ty)
         .into_iter()
         .filter_map(|imp| imp.try_to_nav(sema.db))
diff --git a/crates/ide/src/goto_type_definition.rs b/crates/ide/src/goto_type_definition.rs
index a3d1679cd374..070eb924233f 100644
--- a/crates/ide/src/goto_type_definition.rs
+++ b/crates/ide/src/goto_type_definition.rs
@@ -38,7 +38,7 @@ pub(crate) fn goto_type_definition(
             }
         }
     };
-    let mut process_ty = |ty: hir::Type| {
+    let mut process_ty = |ty: hir::Type<'_>| {
         // collect from each `ty` into the `res` result vec
         let ty = ty.strip_references();
         ty.walk(db, |t| {
diff --git a/crates/ide/src/hover.rs b/crates/ide/src/hover.rs
index 5cab8efa798d..f379cce56b9f 100644
--- a/crates/ide/src/hover.rs
+++ b/crates/ide/src/hover.rs
@@ -425,7 +425,7 @@ pub(crate) fn hover_for_definition(
     sema: &Semantics<'_, RootDatabase>,
     file_id: FileId,
     def: Definition,
-    subst: Option<GenericSubstitution>,
+    subst: Option<GenericSubstitution<'_>>,
     scope_node: &SyntaxNode,
     macro_arm: Option<u32>,
     render_extras: bool,
@@ -482,10 +482,10 @@ pub(crate) fn hover_for_definition(
     }
 }
 
-fn notable_traits(
-    db: &RootDatabase,
-    ty: &hir::Type,
-) -> Vec<(hir::Trait, Vec<(Option<hir::Type>, hir::Name)>)> {
+fn notable_traits<'db>(
+    db: &'db RootDatabase,
+    ty: &hir::Type<'db>,
+) -> Vec<(hir::Trait, Vec<(Option<hir::Type<'db>>, hir::Name)>)> {
     db.notable_traits_in_deps(ty.krate(db).into())
         .iter()
         .flat_map(|it| &**it)
@@ -565,8 +565,8 @@ fn runnable_action(
 fn goto_type_action_for_def(
     db: &RootDatabase,
     def: Definition,
-    notable_traits: &[(hir::Trait, Vec<(Option<hir::Type>, hir::Name)>)],
-    subst_types: Option<Vec<(hir::Symbol, hir::Type)>>,
+    notable_traits: &[(hir::Trait, Vec<(Option<hir::Type<'_>>, hir::Name)>)],
+    subst_types: Option<Vec<(hir::Symbol, hir::Type<'_>)>>,
     edition: Edition,
 ) -> Option<HoverAction> {
     let mut targets: Vec<hir::ModuleDef> = Vec::new();
@@ -620,7 +620,7 @@ fn goto_type_action_for_def(
 
 fn walk_and_push_ty(
     db: &RootDatabase,
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
     push_new_def: &mut dyn FnMut(hir::ModuleDef),
 ) {
     ty.walk(db, |t| {
diff --git a/crates/ide/src/hover/render.rs b/crates/ide/src/hover/render.rs
index a4cb869ac1f6..0895d5575674 100644
--- a/crates/ide/src/hover/render.rs
+++ b/crates/ide/src/hover/render.rs
@@ -475,10 +475,10 @@ pub(super) fn definition(
     db: &RootDatabase,
     def: Definition,
     famous_defs: Option<&FamousDefs<'_, '_>>,
-    notable_traits: &[(Trait, Vec<(Option<Type>, Name)>)],
+    notable_traits: &[(Trait, Vec<(Option<Type<'_>>, Name)>)],
     macro_arm: Option<u32>,
     render_extras: bool,
-    subst_types: Option<&Vec<(Symbol, Type)>>,
+    subst_types: Option<&Vec<(Symbol, Type<'_>)>>,
     config: &HoverConfig,
     edition: Edition,
     display_target: DisplayTarget,
@@ -899,7 +899,7 @@ pub(super) fn literal(
 
 fn render_notable_trait(
     db: &RootDatabase,
-    notable_traits: &[(Trait, Vec<(Option<Type>, Name)>)],
+    notable_traits: &[(Trait, Vec<(Option<Type<'_>>, Name)>)],
     edition: Edition,
     display_target: DisplayTarget,
 ) -> Option<String> {
@@ -935,7 +935,7 @@ fn render_notable_trait(
 fn type_info(
     sema: &Semantics<'_, RootDatabase>,
     config: &HoverConfig,
-    ty: TypeInfo,
+    ty: TypeInfo<'_>,
     edition: Edition,
     display_target: DisplayTarget,
 ) -> Option<HoverResult> {
@@ -1019,7 +1019,7 @@ fn type_info(
 fn closure_ty(
     sema: &Semantics<'_, RootDatabase>,
     config: &HoverConfig,
-    TypeInfo { original, adjusted }: &TypeInfo,
+    TypeInfo { original, adjusted }: &TypeInfo<'_>,
     edition: Edition,
     display_target: DisplayTarget,
 ) -> Option<HoverResult> {
diff --git a/crates/ide/src/inlay_hints.rs b/crates/ide/src/inlay_hints.rs
index a260944d0553..2499999d49f8 100644
--- a/crates/ide/src/inlay_hints.rs
+++ b/crates/ide/src/inlay_hints.rs
@@ -712,14 +712,14 @@ impl InlayHintLabelBuilder<'_> {
 fn label_of_ty(
     famous_defs @ FamousDefs(sema, _): &FamousDefs<'_, '_>,
     config: &InlayHintsConfig,
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
     display_target: DisplayTarget,
 ) -> Option<InlayHintLabel> {
     fn rec(
         sema: &Semantics<'_, RootDatabase>,
         famous_defs: &FamousDefs<'_, '_>,
         mut max_length: Option<usize>,
-        ty: &hir::Type,
+        ty: &hir::Type<'_>,
         label_builder: &mut InlayHintLabelBuilder<'_>,
         config: &InlayHintsConfig,
         display_target: DisplayTarget,
@@ -778,11 +778,11 @@ fn label_of_ty(
 }
 
 /// Checks if the type is an Iterator from std::iter and returns the iterator trait and the item type of the concrete iterator.
-fn hint_iterator(
-    sema: &Semantics<'_, RootDatabase>,
-    famous_defs: &FamousDefs<'_, '_>,
-    ty: &hir::Type,
-) -> Option<(hir::Trait, hir::TypeAlias, hir::Type)> {
+fn hint_iterator<'db>(
+    sema: &Semantics<'db, RootDatabase>,
+    famous_defs: &FamousDefs<'_, 'db>,
+    ty: &hir::Type<'db>,
+) -> Option<(hir::Trait, hir::TypeAlias, hir::Type<'db>)> {
     let db = sema.db;
     let strukt = ty.strip_references().as_adt()?;
     let krate = strukt.module(db).krate();
@@ -816,7 +816,7 @@ fn ty_to_text_edit(
     sema: &Semantics<'_, RootDatabase>,
     config: &InlayHintsConfig,
     node_for_hint: &SyntaxNode,
-    ty: &hir::Type,
+    ty: &hir::Type<'_>,
     offset_to_insert: TextSize,
     prefix: impl Into<String>,
 ) -> Option<LazyProperty<TextEdit>> {
diff --git a/crates/ide/src/inlay_hints/param_name.rs b/crates/ide/src/inlay_hints/param_name.rs
index 99c698ce0295..1e806601d3eb 100644
--- a/crates/ide/src/inlay_hints/param_name.rs
+++ b/crates/ide/src/inlay_hints/param_name.rs
@@ -86,10 +86,10 @@ pub(super) fn hints(
     Some(())
 }
 
-fn get_callable(
-    sema: &Semantics<'_, RootDatabase>,
+fn get_callable<'db>(
+    sema: &Semantics<'db, RootDatabase>,
     expr: &ast::Expr,
-) -> Option<(hir::Callable, ast::ArgList)> {
+) -> Option<(hir::Callable<'db>, ast::ArgList)> {
     match expr {
         ast::Expr::CallExpr(expr) => {
             let descended = sema.descend_node_into_attributes(expr.clone()).pop();
diff --git a/crates/ide/src/signature_help.rs b/crates/ide/src/signature_help.rs
index bd14f830dd4d..8c3e3b603bd0 100644
--- a/crates/ide/src/signature_help.rs
+++ b/crates/ide/src/signature_help.rs
@@ -255,7 +255,7 @@ fn signature_help_for_call(
     }
     res.signature.push(')');
 
-    let mut render = |ret_type: hir::Type| {
+    let mut render = |ret_type: hir::Type<'_>| {
         if !ret_type.is_unit() {
             format_to!(res.signature, " -> {}", ret_type.display(db, display_target));
         }
@@ -560,11 +560,11 @@ fn signature_help_for_tuple_expr(
     Some(res)
 }
 
-fn signature_help_for_record_(
-    sema: &Semantics<'_, RootDatabase>,
+fn signature_help_for_record_<'db>(
+    sema: &Semantics<'db, RootDatabase>,
     field_list_children: SyntaxElementChildren,
     path: &ast::Path,
-    fields2: impl Iterator<Item = (hir::Field, hir::Type)>,
+    fields2: impl Iterator<Item = (hir::Field, hir::Type<'db>)>,
     token: SyntaxToken,
     edition: Edition,
     display_target: DisplayTarget,
@@ -652,13 +652,13 @@ fn signature_help_for_record_(
     Some(res)
 }
 
-fn signature_help_for_tuple_pat_ish(
-    db: &RootDatabase,
+fn signature_help_for_tuple_pat_ish<'db>(
+    db: &'db RootDatabase,
     mut res: SignatureHelp,
     pat: &SyntaxNode,
     token: SyntaxToken,
     mut field_pats: AstChildren<ast::Pat>,
-    fields: impl ExactSizeIterator<Item = hir::Type>,
+    fields: impl ExactSizeIterator<Item = hir::Type<'db>>,
     display_target: DisplayTarget,
 ) -> SignatureHelp {
     let rest_pat = field_pats.find(|it| matches!(it, ast::Pat::RestPat(_)));
diff --git a/crates/ide/src/view_memory_layout.rs b/crates/ide/src/view_memory_layout.rs
index 140ae4265be7..63701a4d15e9 100644
--- a/crates/ide/src/view_memory_layout.rs
+++ b/crates/ide/src/view_memory_layout.rs
@@ -107,7 +107,7 @@ pub(crate) fn view_memory_layout(
     fn read_layout(
         nodes: &mut Vec<MemoryLayoutNode>,
         db: &RootDatabase,
-        ty: &Type,
+        ty: &Type<'_>,
         layout: &Layout,
         parent_idx: usize,
         display_target: DisplayTarget,
diff --git a/crates/query-group-macro/src/queries.rs b/crates/query-group-macro/src/queries.rs
index 06a16cc743ae..193a15b24a96 100644
--- a/crates/query-group-macro/src/queries.rs
+++ b/crates/query-group-macro/src/queries.rs
@@ -55,8 +55,8 @@ impl ToTokens for TrackedQuery {
                 quote! {
                     #sig {
                         #annotation
-                        fn #shim(
-                            db: &dyn #trait_name,
+                        fn #shim<'db>(
+                            db: &'db dyn #trait_name,
                             _input: #input_struct_name,
                             #(#pat_and_tys),*
                         ) #ret {
@@ -70,8 +70,8 @@ impl ToTokens for TrackedQuery {
                 quote! {
                     #sig {
                         #annotation
-                        fn #shim(
-                            db: &dyn #trait_name,
+                        fn #shim<'db>(
+                            db: &'db dyn #trait_name,
                             #(#pat_and_tys),*
                         ) #ret {
                             #invoke(db, #(#params),*)
diff --git a/crates/rust-analyzer/src/cli/analysis_stats.rs b/crates/rust-analyzer/src/cli/analysis_stats.rs
index 66334e773814..f83f44b86cc9 100644
--- a/crates/rust-analyzer/src/cli/analysis_stats.rs
+++ b/crates/rust-analyzer/src/cli/analysis_stats.rs
@@ -527,7 +527,7 @@ impl flags::AnalysisStats {
                 }
 
                 let todo = syntax::ast::make::ext::expr_todo().to_string();
-                let mut formatter = |_: &hir::Type| todo.clone();
+                let mut formatter = |_: &hir::Type<'_>| todo.clone();
                 let mut syntax_hit_found = false;
                 for term in found_terms {
                     let generated = term
diff --git a/crates/stdx/src/lib.rs b/crates/stdx/src/lib.rs
index 982be40dd425..e2a4efd16df7 100644
--- a/crates/stdx/src/lib.rs
+++ b/crates/stdx/src/lib.rs
@@ -13,6 +13,7 @@ pub mod panic_context;
 pub mod process;
 pub mod rand;
 pub mod thread;
+pub mod variance;
 
 pub use itertools;
 
diff --git a/crates/stdx/src/variance.rs b/crates/stdx/src/variance.rs
new file mode 100644
index 000000000000..8465d72bf371
--- /dev/null
+++ b/crates/stdx/src/variance.rs
@@ -0,0 +1,270 @@
+//! This is a copy of [`std::marker::variance`].
+
+use std::any::type_name;
+use std::cmp::Ordering;
+use std::fmt;
+use std::hash::{Hash, Hasher};
+use std::marker::PhantomData;
+
+macro_rules! first_token {
+    ($first:tt $($rest:tt)*) => {
+        $first
+    };
+}
+macro_rules! phantom_type {
+    ($(
+        $(#[$attr:meta])*
+        pub struct $name:ident <$t:ident> ($($inner:tt)*);
+    )*) => {$(
+        $(#[$attr])*
+        pub struct $name<$t>($($inner)*) where T: ?Sized;
+
+        impl<T> $name<T>
+            where T: ?Sized
+        {
+            /// Constructs a new instance of the variance marker.
+            pub const fn new() -> Self {
+                Self(PhantomData)
+            }
+        }
+
+        impl<T> self::sealed::Sealed for $name<T> where T: ?Sized {
+            const VALUE: Self = Self::new();
+        }
+
+        impl<T> Variance for $name<T> where T: ?Sized {}
+
+        impl<T> Default for $name<T>
+            where T: ?Sized
+        {
+            fn default() -> Self {
+                Self(PhantomData)
+            }
+        }
+
+        impl<T> fmt::Debug for $name<T>
+            where T: ?Sized
+        {
+            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                write!(f, "{}<{}>", stringify!($name), type_name::<T>())
+            }
+        }
+
+        impl<T> Clone for $name<T>
+            where T: ?Sized
+        {
+            fn clone(&self) -> Self {
+                *self
+            }
+        }
+
+        impl<T> Copy for $name<T> where T: ?Sized {}
+
+        impl<T> PartialEq for $name<T>
+            where T: ?Sized
+        {
+            fn eq(&self, _: &Self) -> bool {
+                true
+            }
+        }
+
+        impl<T> Eq for $name<T> where T: ?Sized {}
+
+        #[allow(clippy::non_canonical_partial_ord_impl)]
+        impl<T> PartialOrd for $name<T>
+            where T: ?Sized
+        {
+            fn partial_cmp(&self, _: &Self) -> Option<Ordering> {
+                Some(Ordering::Equal)
+            }
+        }
+
+        impl<T> Ord for $name<T>
+            where T: ?Sized
+        {
+            fn cmp(&self, _: &Self) -> Ordering {
+                Ordering::Equal
+            }
+        }
+
+        impl<T> Hash for $name<T>
+            where T: ?Sized
+        {
+            fn hash<H: Hasher>(&self, _: &mut H) {}
+        }
+    )*};
+}
+
+macro_rules! phantom_lifetime {
+    ($(
+        $(#[$attr:meta])*
+        pub struct $name:ident <$lt:lifetime> ($($inner:tt)*);
+    )*) => {$(
+        $(#[$attr])*
+
+        #[derive(Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+        pub struct $name<$lt>($($inner)*);
+
+        impl $name<'_> {
+            /// Constructs a new instance of the variance marker.
+            pub const fn new() -> Self {
+                Self(first_token!($($inner)*)(PhantomData))
+            }
+        }
+
+        impl self::sealed::Sealed for $name<'_> {
+            const VALUE: Self = Self::new();
+        }
+
+        impl Variance for $name<'_> {}
+
+        impl fmt::Debug for $name<'_> {
+            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                write!(f, "{}", stringify!($name))
+            }
+        }
+    )*};
+}
+
+phantom_lifetime! {
+    /// Zero-sized type used to mark a lifetime as covariant.
+    ///
+    /// Covariant lifetimes must live at least as long as declared. See [the reference][1] for more
+    /// information.
+    ///
+    /// [1]: https://doc.rust-lang.org/stable/reference/subtyping.html#variance
+    ///
+    /// ## Layout
+    ///
+    /// For all `'a`, the following are guaranteed:
+    /// * `size_of::<PhantomCovariantLifetime<'a>>() == 0`
+    /// * `align_of::<PhantomCovariantLifetime<'a>>() == 1`
+
+    pub struct PhantomCovariantLifetime<'a>(PhantomCovariant<&'a ()>);
+    /// Zero-sized type used to mark a lifetime as contravariant.
+    ///
+    /// Contravariant lifetimes must live at most as long as declared. See [the reference][1] for
+    /// more information.
+    ///
+    /// [1]: https://doc.rust-lang.org/stable/reference/subtyping.html#variance
+    ///
+    /// ## Layout
+    ///
+    /// For all `'a`, the following are guaranteed:
+    /// * `size_of::<PhantomContravariantLifetime<'a>>() == 0`
+    /// * `align_of::<PhantomContravariantLifetime<'a>>() == 1`
+
+    pub struct PhantomContravariantLifetime<'a>(PhantomContravariant<&'a ()>);
+    /// Zero-sized type used to mark a lifetime as invariant.
+    ///
+    /// Invariant lifetimes must be live for the exact length declared, neither shorter nor longer.
+    /// See [the reference][1] for more information.
+    ///
+    /// [1]: https://doc.rust-lang.org/stable/reference/subtyping.html#variance
+    ///
+    /// ## Layout
+    ///
+    /// For all `'a`, the following are guaranteed:
+    /// * `size_of::<PhantomInvariantLifetime<'a>>() == 0`
+    /// * `align_of::<PhantomInvariantLifetime<'a>>() == 1`
+
+    pub struct PhantomInvariantLifetime<'a>(PhantomInvariant<&'a ()>);
+
+}
+
+phantom_type! {
+    /// Zero-sized type used to mark a type parameter as covariant.
+    ///
+    /// Types used as part of the return value from a function are covariant. If the type is _also_
+    /// passed as a parameter then it is [invariant][PhantomInvariant]. See [the reference][1] for
+    /// more information.
+    ///
+    /// [1]: https://doc.rust-lang.org/stable/reference/subtyping.html#variance
+    ///
+    /// ## Layout
+    ///
+    /// For all `T`, the following are guaranteed:
+    /// * `size_of::<PhantomCovariant<T>>() == 0`
+    /// * `align_of::<PhantomCovariant<T>>() == 1`
+
+    pub struct PhantomCovariant<T>(PhantomData<fn() -> T>);
+    /// Zero-sized type used to mark a type parameter as contravariant.
+    ///
+    /// Types passed as arguments to a function are contravariant. If the type is _also_ part of the
+    /// return value from a function then it is [invariant][PhantomInvariant]. See [the
+    /// reference][1] for more information.
+    ///
+    /// [1]: https://doc.rust-lang.org/stable/reference/subtyping.html#variance
+    ///
+    /// ## Layout
+    ///
+    /// For all `T`, the following are guaranteed:
+    /// * `size_of::<PhantomContravariant<T>>() == 0`
+    /// * `align_of::<PhantomContravariant<T>>() == 1`
+
+    pub struct PhantomContravariant<T>(PhantomData<fn(T)>);
+    /// Zero-sized type used to mark a type parameter as invariant.
+    ///
+    /// Types that are both passed as an argument _and_ used as part of the return value from a
+    /// function are invariant. See [the reference][1] for more information.
+    ///
+    /// [1]: https://doc.rust-lang.org/stable/reference/subtyping.html#variance
+    ///
+    /// ## Layout
+    ///
+    /// For all `T`, the following are guaranteed:
+    /// * `size_of::<PhantomInvariant<T>>() == 0`
+    /// * `align_of::<PhantomInvariant<T>>() == 1`
+
+    pub struct PhantomInvariant<T>(PhantomData<fn(T) -> T>);
+
+}
+
+mod sealed {
+
+    pub trait Sealed {
+        const VALUE: Self;
+    }
+}
+/// A marker trait for phantom variance types.
+pub trait Variance: sealed::Sealed + Default {}
+/// Construct a variance marker; equivalent to [`Default::default`].
+///
+/// This type can be any of the following. You generally should not need to explicitly name the
+/// type, however.
+///
+/// - [`PhantomCovariant`]
+/// - [`PhantomContravariant`]
+/// - [`PhantomInvariant`]
+/// - [`PhantomCovariantLifetime`]
+/// - [`PhantomContravariantLifetime`]
+/// - [`PhantomInvariantLifetime`]
+///
+/// # Example
+///
+/// ```rust
+/// #![feature(phantom_variance_markers)]
+///
+/// use core::marker::{PhantomCovariant, variance};
+///
+/// struct BoundFn<F, P, R>
+/// where
+///     F: Fn(P) -> R,
+/// {
+///     function: F,
+///     parameter: P,
+///     return_value: PhantomCovariant<R>,
+/// }
+///
+/// let bound_fn = BoundFn {
+///     function: core::convert::identity,
+///     parameter: 5u8,
+///     return_value: variance(),
+/// };
+/// ```
+pub const fn variance<T>() -> T
+where
+    T: Variance,
+{
+    T::VALUE
+}