Implemented higher order list queries `All` and `Any`

* in terms of `Fold` and `Map`, not the most efficient but reasonably concise
* added appropriate test cases

1 files changed, 30 insertions, 0 deletions

diff --git a/src/list/operation/higher/query.h b/src/list/operation/higher/query.h
new file mode 100644
index 0000000..56bb203
--- /dev/null
+++ b/src/list/operation/higher/query.h
@@ -0,0 +1,30 @@
+#ifndef TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_QUERY_H_
+#define TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_QUERY_H_
+
+#include "operation/logic.h"
+
+namespace tav {
+
+template <
+	template<typename> class Function,
+	typename                 List
+>
+using Any = Fold<
+	Or,
+	Boolean<false>,
+	typename Map<Function, List>::type
+>;
+
+template <
+	template<typename> class Function,
+	typename                 List
+>
+using All = Fold<
+	And,
+	Boolean<true>,
+	typename Map<Function, List>::type
+>;
+
+}
+
+#endif  // TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_QUERY_H_