Moved class-based implementations into `detail` namespace

* while class templates enable e.g. hiding implementation details they also require evaluation via `Eval`
** this clutters up the actual logic and is now hidden behind aliae that perform the evaluation

1 files changed, 14 insertions, 4 deletions

diff --git a/src/list/operation/higher/take_while.h b/src/list/operation/higher/take_while.h
index 8e61c45..dec5551 100644
--- a/src/list/operation/higher/take_while.h
+++ b/src/list/operation/higher/take_while.h
@@ -5,19 +5,21 @@
 
 namespace tav {
 
+namespace detail {
+
 template <
 	template<typename> class Predicate,
 	typename                 Current
 >
 struct TakeWhile {
-	typedef Eval<If<
+	typedef If<
 		Eval<Predicate<Head<Current>>>,
-		Eval<Cons<
+		Cons<
 			Head<Current>,
 			Eval<TakeWhile<Predicate, Tail<Current>>>
-		>>,
+		>,
 		void
-	>> type;
+	> type;
 };
 
 template <
@@ -29,4 +31,12 @@ struct TakeWhile<Predicate, void> {
 
 }
 
+template <
+	template<typename> class Predicate,
+	typename                 Current
+>
+using TakeWhile = Eval<detail::TakeWhile<Predicate, Current>>;
+
+}
+
 #endif  // TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_TAKE_WHILE_H_