nested route matching

either_of/src/lib.rs

@@ -2,7 +2,7 @@
 
 use core::fmt::Display;
 
-#[derive(Debug)]
+#[derive(Debug, Clone, Copy)]
 pub enum Either<A, B> {
     Left(A),
     Right(B),
@@ -41,6 +41,19 @@ macro_rules! tuples {
             }
         }
 
+        impl<Item, $($ty,)*> Iterator for $name<$($ty,)*>
+        where
+            $($ty: Iterator<Item = Item>,)*
+        {
+            type Item = Item;
+
+            fn next(&mut self) -> Option<Self::Item> {
+                match self {
+                    $($name::$ty(i) => i.next(),)*
+                }
+            }
+        }
+
         /*impl<$($ty,)*> Iterator for $name<$($ty,)*>
         where
             $($ty: Iterator,)*