From f466d39f3902353f769c659bbdd5622be6684c29 Mon Sep 17 00:00:00 2001
From: Erik Desjardins <erikdesjardins@users.noreply.github.com>
Date: Sun, 5 Aug 2018 16:06:00 -0400
Subject: [PATCH] impl FromRequest for ()

---
 src/extractor.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/extractor.rs b/src/extractor.rs
index 5c2c7f600..1f196c92c 100644
--- a/src/extractor.rs
+++ b/src/extractor.rs
@@ -690,6 +690,12 @@ macro_rules! tuple_from_req ({$fut_type:ident, $(($n:tt, $T:ident)),+} => {
     }
 });
 
+impl<S> FromRequest<S> for () {
+    type Config = ();
+    type Result = Self;
+    fn from_request(_req: &HttpRequest<S>, _cfg: &Self::Config) {}
+}
+
 tuple_from_req!(TupleFromRequest1, (0, A));
 tuple_from_req!(TupleFromRequest2, (0, A), (1, B));
 tuple_from_req!(TupleFromRequest3, (0, A), (1, B), (2, C));
@@ -1006,5 +1012,7 @@ mod tests {
         assert_eq!((res.0).1, "user1");
         assert_eq!((res.1).0, "name");
         assert_eq!((res.1).1, "user1");
+
+        <()>::extract(&req);
     }
 }