From 27bf11d35c8ce44fd9fef656e2975712846b9bb2 Mon Sep 17 00:00:00 2001
From: Antony Woods <acron1@gmail.com>
Date: Thu, 23 Oct 2014 18:33:03 +0100
Subject: Re-implemented 'get_middleware()' as suggested, without changing the
 Server constructor and now no longer encountering hangs

---
 include/utility.h | 42 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

(limited to 'include/utility.h')

diff --git a/include/utility.h b/include/utility.h
index c910eb2..835fdbd 100644
--- a/include/utility.h
+++ b/include/utility.h
@@ -293,5 +293,45 @@ template <typename F, typename Set>
         struct empty_context
         {
         };
-	}
+
+    } // namespace black_magic
+
+    namespace detail
+    {
+
+        template <class T, std::size_t N, class... Args>
+        struct get_index_of_element_from_tuple_by_type_impl
+        {
+            static constexpr auto value = N;
+        };
+
+        template <class T, std::size_t N, class... Args>
+        struct get_index_of_element_from_tuple_by_type_impl<T, N, T, Args...>
+        {
+            static constexpr auto value = N;
+        };
+
+        template <class T, std::size_t N, class U, class... Args>
+        struct get_index_of_element_from_tuple_by_type_impl<T, N, U, Args...>
+        {
+            static constexpr auto value = get_index_of_element_from_tuple_by_type_impl<T, N + 1, Args...>::value;
+        };
+
+    } // namespace detail
+
+    namespace utility
+    {
+        template <class T, class... Args>
+        T get_element_by_type(std::tuple<Args...>& t)
+        {
+            return std::get<detail::get_index_of_element_from_tuple_by_type_impl<T, 0, Args...>::value>(t);
+        }
+
+        template <class T, class... Args>
+        T* get_element_by_type_ptr(std::tuple<Args...>& t)
+        {
+            return &std::get<detail::get_index_of_element_from_tuple_by_type_impl<T, 0, Args...>::value>(t);
+        }
+
+    } // namespace utility
 }
-- 
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