Record import aliases in symbol index

crates/hir/src/attrs.rs

@@ -4,6 +4,7 @@ use hir_def::{
     attr::{AttrsWithOwner, Documentation},
     item_scope::ItemInNs,
     path::{ModPath, Path},
+    per_ns::Namespace,
     resolver::{HasResolver, Resolver, TypeNs},
     AssocItemId, AttrDefId, GenericParamId, ModuleDefId,
 };
@@ -28,13 +29,6 @@ pub trait HasAttrs {
     ) -> Option<DocLinkDef>;
 }
 
-#[derive(PartialEq, Eq, Hash, Copy, Clone, Debug)]
-pub enum Namespace {
-    Types,
-    Values,
-    Macros,
-}
-
 /// Subset of `ide_db::Definition` that doc links can resolve to.
 pub enum DocLinkDef {
     ModuleDef(ModuleDef),

crates/hir/src/lib.rs

@@ -88,7 +88,7 @@ use triomphe::Arc;
 use crate::db::{DefDatabase, HirDatabase};
 
 pub use crate::{
-    attrs::{DocLinkDef, HasAttrs, Namespace},
+    attrs::{DocLinkDef, HasAttrs},
     diagnostics::{
         AnyDiagnostic, BreakOutsideOfLoop, CaseType, ExpectedFunction, InactiveCode,
         IncoherentImpl, IncorrectCase, InvalidDeriveTarget, MacroDefError, MacroError,
@@ -122,6 +122,7 @@ pub use {
         lang_item::LangItem,
         nameres::{DefMap, ModuleSource},
         path::{ModPath, PathKind},
+        per_ns::Namespace,
         type_ref::{Mutability, TypeRef},
         visibility::Visibility,
         // FIXME: This is here since some queries take it as input that are used

crates/hir/src/symbols.rs

@@ -2,8 +2,10 @@
 
 use base_db::FileRange;
 use hir_def::{
-    src::HasSource, AdtId, AssocItemId, DefWithBodyId, HasModule, ImplId, Lookup, MacroId,
-    ModuleDefId, ModuleId, TraitId,
+    item_scope::ItemInNs,
+    src::{HasChildSource, HasSource},
+    AdtId, AssocItemId, DefWithBodyId, HasModule, ImplId, Lookup, MacroId, ModuleDefId, ModuleId,
+    TraitId,
 };
 use hir_expand::{HirFileId, InFile};
 use hir_ty::db::HirDatabase;
@@ -167,6 +169,40 @@ impl<'a> SymbolCollector<'a> {
             self.collect_from_impl(impl_id);
         }
 
+        // Record renamed imports.
+        // In case it imports multiple items under different namespaces we just pick one arbitrarily
+        // for now.
+        for id in scope.imports() {
+            let loc = id.import.lookup(self.db.upcast());
+            loc.id.item_tree(self.db.upcast());
+            let source = id.import.child_source(self.db.upcast());
+            let Some(use_tree_src) = source.value.get(id.idx) else { continue };
+            let Some(rename) = use_tree_src.rename() else { continue };
+            let Some(name) = rename.name() else { continue };
+
+            let res = scope.fully_resolve_import(self.db.upcast(), id);
+            res.iter_items().for_each(|(item, _)| {
+                let def = match item {
+                    ItemInNs::Types(def) | ItemInNs::Values(def) => def,
+                    ItemInNs::Macros(def) => ModuleDefId::from(def),
+                }
+                .into();
+                let dec_loc = DeclarationLocation {
+                    hir_file_id: source.file_id,
+                    ptr: SyntaxNodePtr::new(use_tree_src.syntax()),
+                    name_ptr: SyntaxNodePtr::new(name.syntax()),
+                };
+
+                self.symbols.push(FileSymbol {
+                    name: name.text().into(),
+                    def,
+                    container_name: self.current_container_name.clone(),
+                    loc: dec_loc,
+                    is_alias: false,
+                });
+            });
+        }
+
         for const_id in scope.unnamed_consts() {
             self.collect_from_body(const_id);
         }