From e1a9461806a4d6dd2ad58be2d6148c0e8fdb2299 Mon Sep 17 00:00:00 2001
From: Edwin Cheng <edwin0cheng@gmail.com>
Date: Sat, 21 Mar 2020 22:43:48 +0800
Subject: Add identity expansion checking

---
 crates/ra_syntax/src/algo.rs | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'crates/ra_syntax/src')

diff --git a/crates/ra_syntax/src/algo.rs b/crates/ra_syntax/src/algo.rs
index 344cf0fbe..ffdbdc767 100644
--- a/crates/ra_syntax/src/algo.rs
+++ b/crates/ra_syntax/src/algo.rs
@@ -95,6 +95,10 @@ impl TreeDiff {
             builder.replace(from.text_range(), to.to_string())
         }
     }
+
+    pub fn is_empty(&self) -> bool {
+        self.replacements.is_empty()
+    }
 }
 
 /// Finds minimal the diff, which, applied to `from`, will result in `to`.
-- 
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