Use cached module scopes for completion

2 files changed, 12 insertions, 2 deletions

diff --git a/crates/ra_analysis/src/descriptors/module/mod.rs b/crates/ra_analysis/src/descriptors/module/mod.rs
index 58d6abed3..bc1148b22 100644
--- a/crates/ra_analysis/src/descriptors/module/mod.rs
+++ b/crates/ra_analysis/src/descriptors/module/mod.rs
@@ -3,7 +3,7 @@ pub(crate) mod scope;
 
 use ra_syntax::{
     ast::{self, AstNode, NameOwner},
-    SmolStr, SyntaxNode,
+    SmolStr, SyntaxNode, SyntaxNodeRef,
 };
 use relative_path::RelativePathBuf;
 
@@ -154,6 +154,16 @@ struct ModuleData {
 }
 
 impl ModuleSource {
+    pub(crate) fn for_node(file_id: FileId, node: SyntaxNodeRef) -> ModuleSource {
+        for node in node.ancestors() {
+            if let Some(m) = ast::Module::cast(node) {
+                if !m.has_semi() {
+                    return ModuleSource::new_inline(file_id, m);
+                }
+            }
+        }
+        ModuleSource::SourceFile(file_id)
+    }
     pub(crate) fn new_inline(file_id: FileId, module: ast::Module) -> ModuleSource {
         assert!(!module.has_semi());
         let ptr = SyntaxPtr::new(file_id, module.syntax());
diff --git a/crates/ra_analysis/src/descriptors/module/scope.rs b/crates/ra_analysis/src/descriptors/module/scope.rs
index 5fcbc3cb0..4490228e4 100644
--- a/crates/ra_analysis/src/descriptors/module/scope.rs
+++ b/crates/ra_analysis/src/descriptors/module/scope.rs
@@ -25,7 +25,7 @@ enum EntryKind {
 }
 
 impl ModuleScope {
-    pub(crate) fn new<'a>(items: impl Iterator<Item = ast::ModuleItem<'a>>) -> ModuleScope {
+    pub(super) fn new<'a>(items: impl Iterator<Item = ast::ModuleItem<'a>>) -> ModuleScope {
         let mut entries = Vec::new();
         for item in items {
             let entry = match item {