Show GotoTypeAction for ConstParam

crates/hir/src/code_model.rs

@@ -1343,6 +1343,12 @@ impl ConstParam {
     pub fn parent(self, _db: &dyn HirDatabase) -> GenericDef {
         self.id.parent.into()
     }
+
+    pub fn ty(self, db: &dyn HirDatabase) -> Type {
+        let def = self.id.parent;
+        let krate = def.module(db.upcast()).krate;
+        Type::new(db, krate, def, db.const_param_ty(self.id))
+    }
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]

crates/ide/src/hover.rs

@@ -228,8 +228,11 @@ fn runnable_action(
 }
 
 fn goto_type_action(db: &RootDatabase, def: Definition) -> Option<HoverAction> {
-    match def {
-        Definition::Local(it) => {
+    let ty = match def {
+        Definition::Local(it) => it.ty(db),
+        Definition::ConstParam(it) => it.ty(db),
+        _ => return None,
+    };
     let mut targets: Vec<ModuleDef> = Vec::new();
     let mut push_new_def = |item: ModuleDef| {
         if !targets.contains(&item) {
@@ -237,7 +240,7 @@ fn goto_type_action(db: &RootDatabase, def: Definition) -> Option<HoverAction> {
         }
     };
 
-            it.ty(db).walk(db, |t| {
+    ty.walk(db, |t| {
         if let Some(adt) = t.as_adt() {
             push_new_def(adt.into());
         } else if let Some(trait_) = t.as_dyn_trait() {
@@ -253,20 +256,13 @@ fn goto_type_action(db: &RootDatabase, def: Definition) -> Option<HoverAction> {
         .into_iter()
         .filter_map(|it| {
             Some(HoverGotoTypeData {
-                        mod_path: render_path(
-                            db,
-                            it.module(db)?,
-                            it.name(db).map(|name| name.to_string()),
-                        ),
+                mod_path: render_path(db, it.module(db)?, it.name(db).map(|name| name.to_string())),
                 nav: it.try_to_nav(db)?,
             })
         })
         .collect();
 
     Some(HoverAction::GoToType(targets))
-        }
-        _ => None,
-    }
 }
 
 fn hover_markup(
@@ -3083,6 +3079,39 @@ fn main() { let s<|>t = test().get(); }
         );
     }
 
+    #[test]
+    fn test_hover_const_param_has_goto_type_action() {
+        check_actions(
+            r#"
+struct Bar;
+struct Foo<const BAR: Bar>;
+
+impl<const BAR: Bar> Foo<BAR<|>> {} 
+"#,
+            expect![[r#"
+                [
+                    GoToType(
+                        [
+                            HoverGotoTypeData {
+                                mod_path: "test::Bar",
+                                nav: NavigationTarget {
+                                    file_id: FileId(
+                                        0,
+                                    ),
+                                    full_range: 0..11,
+                                    focus_range: 7..10,
+                                    name: "Bar",
+                                    kind: Struct,
+                                    description: "struct Bar",
+                                },
+                            },
+                        ],
+                    ),
+                ]
+            "#]],
+        );
+    }
+
     #[test]
     fn hover_displays_normalized_crate_names() {
         check(