1 files changed, 3 insertions, 0 deletions

diff --git a/crates/ra_hir/src/db.rs b/crates/ra_hir/src/db.rs
index f88ae61bb..398e00c42 100644
--- a/crates/ra_hir/src/db.rs
+++ b/crates/ra_hir/src/db.rs
@@ -45,6 +45,9 @@ pub trait DefDatabase: SourceDatabase {
     #[salsa::invoke(crate::ids::macro_arg_query)]
     fn macro_arg(&self, macro_call: ids::MacroCallId) -> Option<Arc<tt::Subtree>>;
 
+    #[salsa::invoke(crate::ids::macro_expand_query)]
+    fn macro_expand(&self, macro_call: ids::MacroCallId) -> Result<Arc<tt::Subtree>, String>;
+
     #[salsa::invoke(crate::ids::HirFileId::hir_parse_query)]
     fn hir_parse(&self, file_id: HirFileId) -> TreeArc<SourceFile>;