Added `void` concatenation `List` template specialization

* otherwise a type conflict occurs when trying to instantiate a list of `void`
** this hinders construction of higher level functionality on top of `List`

1 files changed, 5 insertions, 0 deletions

diff --git a/src/list/list.h b/src/list/list.h
index d2a5cb0..658ac31 100644
--- a/src/list/list.h
+++ b/src/list/list.h
@@ -31,6 +31,11 @@ struct List<void, Tail...> {
 	typedef typename List<Tail...>::type type;
 };
 
+template <>
+struct List<void, void> {
+	typedef void type;
+};
+
 template <
 	typename Type,
 	Type...  Values