1 files changed, 11 insertions, 0 deletions
diff --git a/third_party/rust/petgraph/src/macros.rs b/third_party/rust/petgraph/src/macros.rs
new file mode 100644
index 0000000000..0d86ad13d1
--- /dev/null
+++ b/third_party/rust/petgraph/src/macros.rs
@@ -0,0 +1,11 @@
+macro_rules! clone_fields {
+    ($name:ident, $($field:ident),+ $(,)*) => (
+        fn clone(&self) -> Self {
+            $name {
+                $(
+                    $field : self . $field .clone()
+                ),*
+            }
+        }
+    );
+}