nest_type/get.hpp 実装

diff --git a/roast/include/roast/tp/nest_type/get.hpp b/roast/include/roast/tp/nest_type/get.hpp
index a3f7c38..50ee16f 100644 (file)
--- a/roast/include/roast/tp/nest_type/get.hpp
+++ b/roast/include/roast/tp/nest_type/get.hpp
@@ -11,9 +11,13 @@ namespace roast
 {
        namespace _nest_type
        {
-               template <typename _NestType, int N>
-               typename get_type<_NestType, N>::type get()
+               template <int N, typename _NestType>
+               typename get_type<_NestType, N>::type& ref(_NestType& nest)
                {
+                       if ( N == 0 )
+                               return nest.value;
+                       else
+                               return ref<N-1>(nest.next);
                }
        }
 }