From 1c8f09268bb610e1e6a375578458110cab84b3a2 Mon Sep 17 00:00:00 2001
From: David Pedersen <david.pdrsn@gmail.com>
Date: Thu, 3 Mar 2022 08:07:00 +0100
Subject: [PATCH] Implement `IntoResponseParts` for more tuples (#817)

---
 axum-core/src/response/into_response_parts.rs | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/axum-core/src/response/into_response_parts.rs b/axum-core/src/response/into_response_parts.rs
index bbe603ac..6022ea57 100644
--- a/axum-core/src/response/into_response_parts.rs
+++ b/axum-core/src/response/into_response_parts.rs
@@ -144,3 +144,32 @@ where
         }
     }
 }
+
+macro_rules! impl_into_response_parts {
+    ( $($ty:ident),* $(,)? ) => {
+        #[allow(non_snake_case)]
+        impl<$($ty,)*> IntoResponseParts for ($($ty,)*)
+        where
+            $( $ty: IntoResponseParts, )*
+        {
+            type Error = Response;
+
+            fn into_response_parts(self, res: ResponseParts) -> Result<ResponseParts, Self::Error> {
+                let ($($ty,)*) = self;
+
+                $(
+                    let res = match $ty.into_response_parts(res) {
+                        Ok(res) => res,
+                        Err(err) => {
+                            return Err(err.into_response());
+                        }
+                    };
+                )*
+
+                Ok(res)
+            }
+        }
+    }
+}
+
+all_the_tuples!(impl_into_response_parts);