2 files changed, 19 insertions, 7 deletions

diff --git a/crates/ra_hir_def/src/body.rs b/crates/ra_hir_def/src/body.rs
index d3e4c50ae..142c52d35 100644
--- a/crates/ra_hir_def/src/body.rs
+++ b/crates/ra_hir_def/src/body.rs
@@ -163,6 +163,7 @@ pub struct BodySourceMap {
     pat_map: FxHashMap<PatSource, PatId>,
     pat_map_back: ArenaMap<PatId, PatSource>,
     field_map: FxHashMap<(ExprId, usize), AstPtr<ast::RecordField>>,
+    expansions: FxHashMap<InFile<AstPtr<ast::MacroCall>>, HirFileId>,
 }
 
 impl Body {
@@ -237,6 +238,11 @@ impl BodySourceMap {
         self.expr_map.get(&src).cloned()
     }
 
+    pub fn node_macro_file(&self, node: InFile<&ast::MacroCall>) -> Option<HirFileId> {
+        let src = node.map(|it| AstPtr::new(it));
+        self.expansions.get(&src).cloned()
+    }
+
     pub fn field_init_shorthand_expr(&self, node: InFile<&ast::RecordField>) -> Option<ExprId> {
         let src = node.map(|it| Either::Right(AstPtr::new(it)));
         self.expr_map.get(&src).cloned()
diff --git a/crates/ra_hir_def/src/body/lower.rs b/crates/ra_hir_def/src/body/lower.rs
index fc3a028e0..e656f9a41 100644
--- a/crates/ra_hir_def/src/body/lower.rs
+++ b/crates/ra_hir_def/src/body/lower.rs
@@ -446,14 +446,20 @@ where
                 }
             }
             // FIXME expand to statements in statement position
-            ast::Expr::MacroCall(e) => match self.expander.enter_expand(self.db, e) {
-                Some((mark, expansion)) => {
-                    let id = self.collect_expr(expansion);
-                    self.expander.exit(self.db, mark);
-                    id
+            ast::Expr::MacroCall(e) => {
+                let macro_call = self.expander.to_source(AstPtr::new(&e));
+                match self.expander.enter_expand(self.db, e.clone()) {
+                    Some((mark, expansion)) => {
+                        self.source_map
+                            .expansions
+                            .insert(macro_call, self.expander.current_file_id);
+                        let id = self.collect_expr(expansion);
+                        self.expander.exit(self.db, mark);
+                        id
+                    }
+                    None => self.alloc_expr(Expr::Missing, syntax_ptr),
                 }
-                None => self.alloc_expr(Expr::Missing, syntax_ptr),
-            },
+            }
 
             // FIXME implement HIR for these:
             ast::Expr::Label(_e) => self.alloc_expr(Expr::Missing, syntax_ptr),