1 files changed, 14 insertions, 0 deletions
diff --git a/third_party/rust/itertools-0.8.0/src/impl_macros.rs b/third_party/rust/itertools-0.8.0/src/impl_macros.rs
new file mode 100644
index 0000000000..b41760aee8
--- /dev/null
+++ b/third_party/rust/itertools-0.8.0/src/impl_macros.rs
@@ -0,0 +1,14 @@
+//! 
+//! Implementation's internal macros
+
+macro_rules! debug_fmt_fields {
+    ($tyname:ident, $($($field:ident).+),*) => {
+        fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+            f.debug_struct(stringify!($tyname))
+                $(
+              .field(stringify!($($field).+), &self.$($field).+)
+              )*
+              .finish()
+        }
+    }
+}