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-rw-r--r--rust/syn/op.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/rust/syn/op.rs b/rust/syn/op.rs
index 575d9faa1273..73dada3fae2d 100644
--- a/rust/syn/op.rs
+++ b/rust/syn/op.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
ast_enum! {
/// A binary operator: `+`, `+=`, `&`.
#[cfg_attr(docsrs, doc(cfg(any(feature = "full", feature = "derive"))))]