1 files changed, 5 insertions, 0 deletions

diff --git a/crates/ra_macros/src/mbe_expander.rs b/crates/ra_macros/src/mbe_expander.rs
new file mode 100644
index 000000000..426229659
--- /dev/null
+++ b/crates/ra_macros/src/mbe_expander.rs
@@ -0,0 +1,5 @@
+use crate::{mbe, tt};
+
+pub fn exapnd(rules: &mbe::MacroRules, input: tt::Subtree) -> Option<tt::Subtree> {
+    Some(input)
+}