9 files changed, 43 insertions, 254 deletions

diff --git a/crates/ra_hir/src/code_model_api.rs b/crates/ra_hir/src/code_model_api.rs
index 86c26f1d8..c918ec9f6 100644
--- a/crates/ra_hir/src/code_model_api.rs
+++ b/crates/ra_hir/src/code_model_api.rs
@@ -186,11 +186,11 @@ impl Module {
     }
 
     pub fn declarations(self, db: &impl HirDatabase) -> Vec<ModuleDef> {
-        let lowered_module = db.lower_module(self);
-        lowered_module
-            .declarations
-            .values()
-            .cloned()
+        let def_map = db.crate_def_map(self.krate);
+        def_map[self.module_id]
+            .scope
+            .entries()
+            .filter_map(|(_name, res)| if res.import.is_none() { Some(res.def) } else { None })
             .flat_map(|per_ns| {
                 per_ns.take_types().into_iter().chain(per_ns.take_values().into_iter())
             })
diff --git a/crates/ra_hir/src/code_model_impl/module.rs b/crates/ra_hir/src/code_model_impl/module.rs
index 5d8f738b5..aa4e62518 100644
--- a/crates/ra_hir/src/code_model_impl/module.rs
+++ b/crates/ra_hir/src/code_model_impl/module.rs
@@ -76,8 +76,8 @@ impl Module {
         db: &impl HirDatabase,
         import: ImportId,
     ) -> TreeArc<ast::PathSegment> {
-        let (_, source_map) = db.lower_module_with_source_map(*self);
-        let (_, source) = self.definition_source(db);
+        let (file_id, source) = self.definition_source(db);
+        let (_, source_map) = db.raw_items_with_source_map(file_id.original_file(db));
         source_map.get(&source, import)
     }
 
diff --git a/crates/ra_hir/src/db.rs b/crates/ra_hir/src/db.rs
index 0190f4987..b8c0a68a6 100644
--- a/crates/ra_hir/src/db.rs
+++ b/crates/ra_hir/src/db.rs
@@ -10,7 +10,7 @@ use crate::{
     Struct, Enum, StructField,
     Const, ConstSignature, Static,
     macros::MacroExpansion,
-    nameres::{Namespace, lower::{LoweredModule, ImportSourceMap}, crate_def_map::{RawItems, CrateDefMap}},
+    nameres::{Namespace, lower::{ImportSourceMap}, crate_def_map::{RawItems, CrateDefMap}},
     ty::{InferenceResult, Ty, method_resolution::CrateImplBlocks, TypableDef, CallableDef, FnSig},
     adt::{StructData, EnumData},
     impl_block::{ModuleImplBlocks, ImplSourceMap},
@@ -38,18 +38,12 @@ pub trait PersistentHirDatabase: SourceDatabase + AsRef<HirInterner> {
     #[salsa::invoke(crate::ids::SourceFileItems::file_item_query)]
     fn file_item(&self, source_item_id: SourceItemId) -> TreeArc<SyntaxNode>;
 
-    #[salsa::invoke(crate::nameres::lower::LoweredModule::lower_module_with_source_map_query)]
-    fn lower_module_with_source_map(
-        &self,
-        module: Module,
-    ) -> (Arc<LoweredModule>, Arc<ImportSourceMap>);
-
-    #[salsa::invoke(crate::nameres::lower::LoweredModule::lower_module_query)]
-    fn lower_module(&self, module: Module) -> Arc<LoweredModule>;
-
     #[salsa::invoke(RawItems::raw_items_query)]
     fn raw_items(&self, file_id: FileId) -> Arc<RawItems>;
 
+    #[salsa::invoke(RawItems::raw_items_with_source_map_query)]
+    fn raw_items_with_source_map(&self, file_id: FileId) -> (Arc<RawItems>, Arc<ImportSourceMap>);
+
     #[salsa::invoke(CrateDefMap::crate_def_map_query)]
     fn crate_def_map(&self, krate: Crate) -> Arc<CrateDefMap>;
 
diff --git a/crates/ra_hir/src/ids.rs b/crates/ra_hir/src/ids.rs
index 6ce00a372..2bd617436 100644
--- a/crates/ra_hir/src/ids.rs
+++ b/crates/ra_hir/src/ids.rs
@@ -83,13 +83,6 @@ impl HirFileId {
         }
     }
 
-    pub(crate) fn as_macro_call_id(self) -> Option<MacroCallId> {
-        match self.0 {
-            HirFileIdRepr::Macro(it) => Some(it),
-            _ => None,
-        }
-    }
-
     pub(crate) fn hir_parse(
         db: &impl PersistentHirDatabase,
         file_id: HirFileId,
diff --git a/crates/ra_hir/src/impl_block.rs b/crates/ra_hir/src/impl_block.rs
index eb2d4ed8d..8807a4b56 100644
--- a/crates/ra_hir/src/impl_block.rs
+++ b/crates/ra_hir/src/impl_block.rs
@@ -4,7 +4,8 @@ use rustc_hash::FxHashMap;
 use ra_arena::{Arena, RawId, impl_arena_id, map::ArenaMap};
 use ra_syntax::{
     AstPtr, SourceFile, TreeArc,
-ast::{self, AstNode}};
+    ast::{self, AstNode}
+};
 
 use crate::{
     Const, TypeAlias, Function, HirFileId,
@@ -13,7 +14,7 @@ use crate::{
     type_ref::TypeRef,
     ids::LocationCtx,
     resolve::Resolver,
-    ty::Ty, generics::GenericParams
+    ty::Ty, generics::GenericParams,
 };
 
 use crate::code_model_api::{Module, ModuleSource};
diff --git a/crates/ra_hir/src/nameres/crate_def_map/collector.rs b/crates/ra_hir/src/nameres/crate_def_map/collector.rs
index 8b727e2c9..0f500ce42 100644
--- a/crates/ra_hir/src/nameres/crate_def_map/collector.rs
+++ b/crates/ra_hir/src/nameres/crate_def_map/collector.rs
@@ -224,7 +224,7 @@ where
                 }
             }
             let resolution = Resolution { def, import: Some(import_id) };
-            self.update(module_id, None, &[(name, resolution)]);
+            self.update(module_id, Some(import_id), &[(name, resolution)]);
         }
     }
 
@@ -262,6 +262,13 @@ where
                 existing.import = import.or(res.import);
                 changed = true;
             }
+            if existing.def.is_none()
+                && res.def.is_none()
+                && existing.import.is_none()
+                && res.import.is_some()
+            {
+                existing.import = res.import;
+            }
         }
         if !changed {
             return;
diff --git a/crates/ra_hir/src/nameres/crate_def_map/raw.rs b/crates/ra_hir/src/nameres/crate_def_map/raw.rs
index f064f722c..dca86e394 100644
--- a/crates/ra_hir/src/nameres/crate_def_map/raw.rs
+++ b/crates/ra_hir/src/nameres/crate_def_map/raw.rs
@@ -14,6 +14,7 @@ use ra_syntax::{
 use crate::{
     PersistentHirDatabase, Name, AsName, Path, HirFileId,
     ids::{SourceFileItemId, SourceFileItems},
+    nameres::lower::ImportSourceMap,
 };
 
 #[derive(Debug, Default, PartialEq, Eq)]
@@ -31,13 +32,21 @@ impl RawItems {
         db: &impl PersistentHirDatabase,
         file_id: FileId,
     ) -> Arc<RawItems> {
+        db.raw_items_with_source_map(file_id).0
+    }
+
+    pub(crate) fn raw_items_with_source_map_query(
+        db: &impl PersistentHirDatabase,
+        file_id: FileId,
+    ) -> (Arc<RawItems>, Arc<ImportSourceMap>) {
         let mut collector = RawItemsCollector {
             raw_items: RawItems::default(),
             source_file_items: db.file_items(file_id.into()),
+            source_map: ImportSourceMap::default(),
         };
         let source_file = db.parse(file_id);
         collector.process_module(None, &*source_file);
-        Arc::new(collector.raw_items)
+        (Arc::new(collector.raw_items), Arc::new(collector.source_map))
     }
 
     pub(crate) fn items(&self) -> &[RawItem] {
@@ -51,6 +60,7 @@ impl RawItems {
         let mut collector = RawItemsCollector {
             raw_items: RawItems::default(),
             source_file_items: Arc::new(source_file_items),
+            source_map: ImportSourceMap::default(),
         };
         collector.process_module(None, &*source_file);
         collector.raw_items
@@ -144,6 +154,7 @@ pub(crate) struct MacroData {
 struct RawItemsCollector {
     raw_items: RawItems,
     source_file_items: Arc<SourceFileItems>,
+    source_map: ImportSourceMap,
 }
 
 impl RawItemsCollector {
@@ -227,6 +238,9 @@ impl RawItemsCollector {
                 is_prelude,
                 is_extern_crate: false,
             });
+            if let Some(segment) = segment {
+                self.source_map.insert(import, segment)
+            }
             self.push_item(current_module, RawItem::Import(import))
         })
     }
diff --git a/crates/ra_hir/src/nameres/lower.rs b/crates/ra_hir/src/nameres/lower.rs
index 24707aed1..d4c7f2481 100644
--- a/crates/ra_hir/src/nameres/lower.rs
+++ b/crates/ra_hir/src/nameres/lower.rs
@@ -1,18 +1,10 @@
-use std::sync::Arc;
-
 use ra_syntax::{
     AstNode, SourceFile, TreeArc, AstPtr,
-    ast::{self, ModuleItemOwner, NameOwner, AttrsOwner},
+    ast,
 };
-use ra_arena::{Arena, RawId, impl_arena_id, map::ArenaMap};
-use rustc_hash::FxHashMap;
+use ra_arena::{RawId, impl_arena_id, map::ArenaMap};
 
-use crate::{
-    SourceItemId, Path, ModuleSource, Name,
-    HirFileId, MacroCallLoc, AsName, PerNs, Function,
-    ModuleDef, Module, Struct, Enum, Const, Static, Trait, TypeAlias,
-    ids::LocationCtx, PersistentHirDatabase,
-};
+use crate::{Path, ModuleSource, Name};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub struct ImportId(RawId);
@@ -27,25 +19,13 @@ pub struct ImportData {
     pub(super) is_extern_crate: bool,
 }
 
-/// A set of items and imports declared inside a module, without relation to
-/// other modules.
-///
-/// This sits in-between raw syntax and name resolution and allows us to avoid
-/// recomputing name res: if two instance of `InputModuleItems` are the same, we
-/// can avoid redoing name resolution.
-#[derive(Debug, Default, PartialEq, Eq)]
-pub struct LoweredModule {
-    pub(crate) declarations: FxHashMap<Name, PerNs<ModuleDef>>,
-    pub(super) imports: Arena<ImportId, ImportData>,
-}
-
 #[derive(Debug, Default, PartialEq, Eq)]
 pub struct ImportSourceMap {
     map: ArenaMap<ImportId, AstPtr<ast::PathSegment>>,
 }
 
 impl ImportSourceMap {
-    fn insert(&mut self, import: ImportId, segment: &ast::PathSegment) {
+    pub(crate) fn insert(&mut self, import: ImportId, segment: &ast::PathSegment) {
         self.map.insert(import, AstPtr::new(segment))
     }
 
@@ -58,165 +38,3 @@ impl ImportSourceMap {
         self.map[import].to_node(file).to_owned()
     }
 }
-
-impl LoweredModule {
-    pub(crate) fn lower_module_query(
-        db: &impl PersistentHirDatabase,
-        module: Module,
-    ) -> Arc<LoweredModule> {
-        db.lower_module_with_source_map(module).0
-    }
-
-    pub(crate) fn lower_module_with_source_map_query(
-        db: &impl PersistentHirDatabase,
-        module: Module,
-    ) -> (Arc<LoweredModule>, Arc<ImportSourceMap>) {
-        let (file_id, source) = module.definition_source(db);
-        let file_id: HirFileId = file_id.into();
-        let mut source_map = ImportSourceMap::default();
-        let mut res = LoweredModule::default();
-        match source {
-            ModuleSource::SourceFile(it) => {
-                res.fill(&mut source_map, db, module, file_id, &mut it.items_with_macros())
-            }
-            ModuleSource::Module(it) => {
-                if let Some(item_list) = it.item_list() {
-                    res.fill(
-                        &mut source_map,
-                        db,
-                        module,
-                        file_id,
-                        &mut item_list.items_with_macros(),
-                    )
-                }
-            }
-        };
-        (Arc::new(res), Arc::new(source_map))
-    }
-
-    fn fill(
-        &mut self,
-        source_map: &mut ImportSourceMap,
-        db: &impl PersistentHirDatabase,
-        module: Module,
-        file_id: HirFileId,
-        items: &mut Iterator<Item = ast::ItemOrMacro>,
-    ) {
-        let file_items = db.file_items(file_id);
-
-        for item in items {
-            match item {
-                ast::ItemOrMacro::Item(it) => {
-                    self.add_def_id(source_map, db, module, file_id, it);
-                }
-                ast::ItemOrMacro::Macro(macro_call) => {
-                    let item_id = file_items.id_of_unchecked(macro_call.syntax());
-                    let loc =
-                        MacroCallLoc { module, source_item_id: SourceItemId { file_id, item_id } };
-                    let id = loc.id(db);
-                    let file_id = HirFileId::from(id);
-                    //FIXME: expand recursively
-                    for item in db.hir_parse(file_id).items() {
-                        self.add_def_id(source_map, db, module, file_id, item);
-                    }
-                }
-            }
-        }
-    }
-
-    fn add_def_id(
-        &mut self,
-        source_map: &mut ImportSourceMap,
-        db: &impl PersistentHirDatabase,
-        module: Module,
-        file_id: HirFileId,
-        item: &ast::ModuleItem,
-    ) {
-        let ctx = LocationCtx::new(db, module, file_id);
-        match item.kind() {
-            ast::ModuleItemKind::StructDef(it) => {
-                if let Some(name) = it.name() {
-                    let s = Struct { id: ctx.to_def(it) };
-                    let s: ModuleDef = s.into();
-                    self.declarations.insert(name.as_name(), PerNs::both(s, s));
-                }
-            }
-            ast::ModuleItemKind::EnumDef(it) => {
-                if let Some(name) = it.name() {
-                    let e = Enum { id: ctx.to_def(it) };
-                    let e: ModuleDef = e.into();
-                    self.declarations.insert(name.as_name(), PerNs::types(e));
-                }
-            }
-            ast::ModuleItemKind::FnDef(it) => {
-                if let Some(name) = it.name() {
-                    let func = Function { id: ctx.to_def(it) };
-                    self.declarations.insert(name.as_name(), PerNs::values(func.into()));
-                }
-            }
-            ast::ModuleItemKind::TraitDef(it) => {
-                if let Some(name) = it.name() {
-                    let t = Trait { id: ctx.to_def(it) };
-                    self.declarations.insert(name.as_name(), PerNs::types(t.into()));
-                }
-            }
-            ast::ModuleItemKind::TypeAliasDef(it) => {
-                if let Some(name) = it.name() {
-                    let t = TypeAlias { id: ctx.to_def(it) };
-                    self.declarations.insert(name.as_name(), PerNs::types(t.into()));
-                }
-            }
-            ast::ModuleItemKind::ImplBlock(_) => {
-                // impls don't define items
-            }
-            ast::ModuleItemKind::UseItem(it) => {
-                self.add_use_item(source_map, it);
-            }
-            ast::ModuleItemKind::ExternCrateItem(it) => {
-                if let Some(name_ref) = it.name_ref() {
-                    let path = Path::from_name_ref(name_ref);
-                    let alias = it.alias().and_then(|a| a.name()).map(AsName::as_name);
-                    self.imports.alloc(ImportData {
-                        path,
-                        alias,
-                        is_glob: false,
-                        is_prelude: false,
-                        is_extern_crate: true,
-                    });
-                }
-            }
-            ast::ModuleItemKind::ConstDef(it) => {
-                if let Some(name) = it.name() {
-                    let c = Const { id: ctx.to_def(it) };
-                    self.declarations.insert(name.as_name(), PerNs::values(c.into()));
-                }
-            }
-            ast::ModuleItemKind::StaticDef(it) => {
-                if let Some(name) = it.name() {
-                    let s = Static { id: ctx.to_def(it) };
-                    self.declarations.insert(name.as_name(), PerNs::values(s.into()));
-                }
-            }
-            ast::ModuleItemKind::Module(_) => {
-                // modules are handled separately directly by name res
-            }
-        };
-    }
-
-    fn add_use_item(&mut self, source_map: &mut ImportSourceMap, item: &ast::UseItem) {
-        let is_prelude =
-            item.attrs().any(|attr| attr.as_atom().map(|s| s == "prelude_import").unwrap_or(false));
-        Path::expand_use_item(item, |path, segment, alias| {
-            let import = self.imports.alloc(ImportData {
-                path,
-                alias,
-                is_glob: segment.is_none(),
-                is_prelude,
-                is_extern_crate: false,
-            });
-            if let Some(segment) = segment {
-                source_map.insert(import, segment)
-            }
-        })
-    }
-}
diff --git a/crates/ra_hir/src/source_binder.rs b/crates/ra_hir/src/source_binder.rs
index 62b699a64..902110913 100644
--- a/crates/ra_hir/src/source_binder.rs
+++ b/crates/ra_hir/src/source_binder.rs
@@ -7,13 +7,13 @@
 /// purely for "IDE needs".
 use ra_db::{FileId, FilePosition};
 use ra_syntax::{
-    SmolStr, TextRange, SyntaxNode,
+    SyntaxNode,
     ast::{self, AstNode, NameOwner},
     algo::{find_node_at_offset, find_leaf_at_offset},
 };
 
 use crate::{
-    HirDatabase, Function, ModuleDef, Struct, Enum,
+    HirDatabase, Function, Struct, Enum,
     AsName, Module, HirFileId, Crate, Trait, Resolver,
     ids::{LocationCtx, SourceFileItemId},
     expr
@@ -152,44 +152,6 @@ pub fn trait_from_module(
     Trait { id: ctx.to_def(trait_def) }
 }
 
-pub fn macro_symbols(db: &impl HirDatabase, file_id: FileId) -> Vec<(SmolStr, TextRange)> {
-    let module = match module_from_file_id(db, file_id) {
-        Some(it) => it,
-        None => return Vec::new(),
-    };
-    let items = db.lower_module(module);
-    let mut res = Vec::new();
-
-    for macro_call_id in items
-        .declarations
-        .iter()
-        .filter_map(|(_, it)| it.clone().take_types())
-        .filter_map(|it| match it {
-            ModuleDef::Trait(it) => Some(it),
-            _ => None,
-        })
-        .filter_map(|it| it.source(db).0.as_macro_call_id())
-    {
-        if let Some(exp) = db.expand_macro_invocation(macro_call_id) {
-            let loc = macro_call_id.loc(db);
-            let syntax = db.file_item(loc.source_item_id);
-            let macro_call = ast::MacroCall::cast(&syntax).unwrap();
-            let off = macro_call.token_tree().unwrap().syntax().range().start();
-            let file = exp.file();
-            for trait_def in file.syntax().descendants().filter_map(ast::TraitDef::cast) {
-                if let Some(name) = trait_def.name() {
-                    let dst_range = name.syntax().range();
-                    if let Some(src_range) = exp.map_range_back(dst_range) {
-                        res.push((name.text().clone(), src_range + off))
-                    }
-                }
-            }
-        }
-    }
-
-    res
-}
-
 pub fn resolver_for_position(db: &impl HirDatabase, position: FilePosition) -> Resolver {
     let file_id = position.file_id;
     let file = db.parse(file_id);