6 files changed, 32 insertions, 4 deletions

diff --git a/crates/hir/src/code_model.rs b/crates/hir/src/code_model.rs
index cc1938333..6cbf5cecf 100644
--- a/crates/hir/src/code_model.rs
+++ b/crates/hir/src/code_model.rs
@@ -1263,6 +1263,24 @@ pub enum GenericParam {
 }
 impl_from!(TypeParam, LifetimeParam, ConstParam for GenericParam);
 
+impl GenericParam {
+    pub fn module(self, db: &dyn HirDatabase) -> Module {
+        match self {
+            GenericParam::TypeParam(it) => it.module(db),
+            GenericParam::LifetimeParam(it) => it.module(db),
+            GenericParam::ConstParam(it) => it.module(db),
+        }
+    }
+
+    pub fn name(self, db: &dyn HirDatabase) -> Name {
+        match self {
+            GenericParam::TypeParam(it) => it.name(db),
+            GenericParam::LifetimeParam(it) => it.name(db),
+            GenericParam::ConstParam(it) => it.name(db),
+        }
+    }
+}
+
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub struct TypeParam {
     pub(crate) id: TypeParamId,
diff --git a/crates/hir/src/db.rs b/crates/hir/src/db.rs
index d01e1b33d..d5d4cf5b6 100644
--- a/crates/hir/src/db.rs
+++ b/crates/hir/src/db.rs
@@ -10,8 +10,8 @@ pub use hir_def::db::{
     TypeAliasDataQuery, UnionDataQuery,
 };
 pub use hir_expand::db::{
-    AstDatabase, AstDatabaseStorage, AstIdMapQuery, InternEagerExpansionQuery, InternMacroQuery,
-    MacroArgTextQuery, MacroDefQuery, MacroExpandQuery, ParseMacroExpansionQuery,
+    AstDatabase, AstDatabaseStorage, AstIdMapQuery, HygieneFrameQuery, InternEagerExpansionQuery,
+    InternMacroQuery, MacroArgTextQuery, MacroDefQuery, MacroExpandQuery, ParseMacroExpansionQuery,
 };
 pub use hir_ty::db::*;
 
diff --git a/crates/hir/src/diagnostics.rs b/crates/hir/src/diagnostics.rs
index b1c924167..447faa04f 100644
--- a/crates/hir/src/diagnostics.rs
+++ b/crates/hir/src/diagnostics.rs
@@ -4,6 +4,6 @@ pub use hir_expand::diagnostics::{
     Diagnostic, DiagnosticCode, DiagnosticSink, DiagnosticSinkBuilder,
 };
 pub use hir_ty::diagnostics::{
-    IncorrectCase, MismatchedArgCount, MissingFields, MissingMatchArms, MissingOkInTailExpr,
+    IncorrectCase, MismatchedArgCount, MissingFields, MissingMatchArms, MissingOkOrSomeInTailExpr,
     NoSuchField, RemoveThisSemicolon,
 };
diff --git a/crates/hir/src/from_id.rs b/crates/hir/src/from_id.rs
index 3e47a5e9d..c8c5fecd7 100644
--- a/crates/hir/src/from_id.rs
+++ b/crates/hir/src/from_id.rs
@@ -1,6 +1,6 @@
 //! Utility module for converting between hir_def ids and code_model wrappers.
 //!
-//! It's unclear if we need this long-term, but it's definitelly useful while we
+//! It's unclear if we need this long-term, but it's definitely useful while we
 //! are splitting the hir.
 
 use hir_def::{
diff --git a/crates/hir/src/semantics.rs b/crates/hir/src/semantics.rs
index cd689c869..ab213e04c 100644
--- a/crates/hir/src/semantics.rs
+++ b/crates/hir/src/semantics.rs
@@ -750,6 +750,7 @@ to_def_impls![
     (crate::ConstParam, ast::ConstParam, const_param_to_def),
     (crate::MacroDef, ast::MacroRules, macro_rules_to_def),
     (crate::Local, ast::IdentPat, bind_pat_to_def),
+    (crate::Local, ast::SelfParam, self_param_to_def),
     (crate::Label, ast::Label, label_to_def),
 ];
 
diff --git a/crates/hir/src/semantics/source_to_def.rs b/crates/hir/src/semantics/source_to_def.rs
index 4b9ebff72..9bf60c72a 100644
--- a/crates/hir/src/semantics/source_to_def.rs
+++ b/crates/hir/src/semantics/source_to_def.rs
@@ -114,6 +114,15 @@ impl SourceToDefCtx<'_, '_> {
         let pat_id = source_map.node_pat(src.as_ref())?;
         Some((container, pat_id))
     }
+    pub(super) fn self_param_to_def(
+        &mut self,
+        src: InFile<ast::SelfParam>,
+    ) -> Option<(DefWithBodyId, PatId)> {
+        let container = self.find_pat_or_label_container(src.as_ref().map(|it| it.syntax()))?;
+        let (_body, source_map) = self.db.body_with_source_map(container);
+        let pat_id = source_map.node_self_param(src.as_ref())?;
+        Some((container, pat_id))
+    }
     pub(super) fn label_to_def(
         &mut self,
         src: InFile<ast::Label>,