1 files changed, 41 insertions, 1 deletions
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
 }