Implemented `Filter` in terms of `Fold`

* as its name implies this _function_ only returns elements which evaluate to _true_ when passed to a given _function_
** this marks the moment where _TypeAsValue_ supports something _ConstList_ does not, i.e. primary goal is achieved
*** namely returning different types depending on the actual _values_ of a _Cons_ structure
* added appropriate test case

1 files changed, 2 insertions, 2 deletions

diff --git a/src/list/operation/basic.h b/src/list/operation/basic.h
index 364a542..d80b347 100644
--- a/src/list/operation/basic.h
+++ b/src/list/operation/basic.h
@@ -13,12 +13,12 @@ class Length {
 			typename,
 			typename Previous
 		>
-		struct Count {
+		struct count {
 			typedef Add<Size<1>, Previous> type;
 		};
 
 	public:
-		typedef typename Fold<Count, Size<0>, Cons>::type type;
+		typedef typename Fold<count, Size<0>, Cons>::type type;
 
 };