nest_type/ref.hpp: こうやった

diff --git a/roast/include/roast/tp/nest_type/ref.hpp b/roast/include/roast/tp/nest_type/ref.hpp
index 34c3c36..c058fb7 100644 (file)
--- a/roast/include/roast/tp/nest_type/ref.hpp
+++ b/roast/include/roast/tp/nest_type/ref.hpp
@@ -14,7 +14,7 @@ namespace roast
                template <int N>
                struct _get_n{};
 
-               template <typename _NestType>
+               template <int N, typename _NestType>
                typename get_type<_NestType, 0>::type& ref(_NestType& nest, const _get_n<0>& )
                {
                        return nest.value;