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-rw-r--r--src/list/operation/higher/fold.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/list/operation/higher/fold.h b/src/list/operation/higher/fold.h
new file mode 100644
index 0000000..6ad4bd7
--- /dev/null
+++ b/src/list/operation/higher/fold.h
@@ -0,0 +1,28 @@
+#ifndef TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_FOLD_H_
+#define TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_FOLD_H_
+
+namespace tav {
+
+template <
+ template<typename, typename> class Function,
+ typename Initial,
+ typename Current
+>
+struct Fold {
+ typedef typename Function<
+ Head<Current>,
+ typename Fold<Function, Initial, Tail<Current>>::type
+ >::type type;
+};
+
+template <
+ template<typename, typename> class Function,
+ typename Initial
+>
+struct Fold<Function, Initial, void> {
+ typedef Initial type;
+};
+
+}
+
+#endif // TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_FOLD_H_