1 files changed, 4 insertions, 0 deletions
diff --git a/src/istring.h b/src/istring.h
index 3a66465d0..921e04487 100644
--- a/src/istring.h
+++ b/src/istring.h
@@ -68,6 +68,10 @@ struct IString {
     str = s.str;
   }
 
+  void clear() {
+    str = nullptr;
+  }
+
   bool operator==(const IString& other) const {
     //assert((str == other.str) == !strcmp(str, other.str));
     return str == other.str; // fast!