From b973158aeb337041d4e1434cf5d8c609a0b02bef Mon Sep 17 00:00:00 2001
From: Florian Diebold <florian.diebold@freiheit.com>
Date: Fri, 13 Mar 2020 13:03:31 +0100
Subject: Make MBE expansion more resilient (WIP)

---
 crates/ra_tt/src/lib.rs | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'crates/ra_tt')

diff --git a/crates/ra_tt/src/lib.rs b/crates/ra_tt/src/lib.rs
index 10f424aae..1e2fb8b91 100644
--- a/crates/ra_tt/src/lib.rs
+++ b/crates/ra_tt/src/lib.rs
@@ -40,6 +40,12 @@ pub enum TokenTree {
 }
 impl_froms!(TokenTree: Leaf, Subtree);
 
+impl TokenTree {
+    pub fn empty() -> Self {
+        TokenTree::Subtree(Subtree::default())
+    }
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub enum Leaf {
     Literal(Literal),
-- 
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