1 files changed, 5 insertions, 0 deletions
diff --git a/src/ast.rs b/src/ast.rs
index 744397a..447c249 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -1,3 +1,8 @@
+// Copyright ⓒ 2017 David Li.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
 use std::ops::Deref;
 
 #[derive(Debug)]