1 files changed, 32 insertions, 0 deletions
diff --git a/include/middleware_context.h b/include/middleware_context.h
new file mode 100644
index 0000000..6dbf923
--- /dev/null
+++ b/include/middleware_context.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include "utility.h"
+
+namespace crow
+{
+    namespace detail
+    {
+        template <typename ... Middlewares>
+        struct partial_context
+            : public black_magic::pop_back<Middlewares...>::template rebind<partial_context>
+            , public black_magic::last_element_type<Middlewares...>::type::context
+        {
+        };
+
+        template <>
+        struct partial_context<>
+        {
+        };
+
+        template <typename ... Middlewares>
+        struct context : private partial_context<Middlewares...>
+        //struct context : private Middlewares::context... // simple but less type-safe
+        {
+            template <typename T> 
+            typename T::context& get()
+            {
+                return static_cast<typename T::context&>(*this);
+            }
+        };
+    }
+}