diff --git a/include/Continuable.h b/include/Continuable.h
index 8249cbc..4364c0d 100644
--- a/include/Continuable.h
+++ b/include/Continuable.h
@@ -94,6 +94,10 @@ private:
     }
 
 public:
+
+    /// Developing
+    Continuable() : _released(true) { }
+
     /// Deleted copy construct
     Continuable(Continuable const&) = delete;
 
@@ -487,7 +491,7 @@ namespace detail
     template<typename... Args>
     struct multiple_when_all_chainer_t_make_result<fu::identity<Args...>>
     {
-        typedef std::function<Continuable</*Args...*/>()> type;
+        typedef Continuable<Args...> type;
 
         // type create()
     };
@@ -507,11 +511,7 @@ namespace detail
         static auto make_when_all(_CTy&&... args)
             -> typename multiple_when_all_chainer_t_make_result<arguments_t>::type
         {
-            return make_continuable([]()
-            {
-                
-
-            });
+            return multiple_when_all_chainer_t_make_result<arguments_t>::type();
         }
     };
 }
diff --git a/include/functional_unwrap.hpp b/include/functional_unwrap.hpp
index ad0100a..e2573be 100644
--- a/include/functional_unwrap.hpp
+++ b/include/functional_unwrap.hpp
@@ -221,8 +221,8 @@ namespace fu
         struct invoker<sequence<Sequence...>>
         {
             template<typename _FTy, typename _TTy>
-            static auto invoke(_FTy&& functional, _TTy&& tuple)
-                -> ::fu::return_type_of_t<typename std::decay<_FTy>::type>
+            inline static auto invoke(_FTy&& functional, _TTy&& tuple)
+                -> return_type_of_t<typename std::decay<_FTy>::type>
             {
                 return std::forward<_FTy>(functional)(std::get<Sequence>(std::forward<_TTy>(tuple))...);
             }
diff --git a/test.cpp b/test.cpp
index c85822c..c03e0d2 100644
--- a/test.cpp
+++ b/test.cpp
@@ -345,10 +345,11 @@ int main(int /*argc*/, char** /*argv*/)
         >
     >::result_maker::partial_results_t myres123345;
 
-    detail::multiple_when_all_chainer_t<
+    auto firstType = detail::multiple_when_all_chainer_t<
         fu::identity<>,
         fu::identity<
             std::function<Continuable<>()>,
+            std::function<Continuable<SpellCastResult>()>,
             std::function<Continuable<SpellCastResult>()>
         >
     >::make_when_all(
@@ -358,7 +359,15 @@ int main(int /*argc*/, char** /*argv*/)
     },
     []
     {
-        return CastSpellPromise(2);
+        return CastSpellPromise(10);
+    },
+    []
+    {
+        return CastSpellPromise(20);
+    })
+    .then([](SpellCastResult, SpellCastResult)
+    {
+        
     });
 
     std::cout << "ok" << std::endl;