diff --git a/src/lib.zig b/src/lib.zig
index 04ed52accf3d2faec400b26446bd21102d28c1fa..94f8cf6d11e074959e72f291eb33beb7b313578a 100644
--- a/src/lib.zig
+++ b/src/lib.zig
@@ -808,3 +808,9 @@ pub const AnyReader = struct {
         }
     }
 };
+
+pub fn sum(comptime T: type, slice: []const T) T {
+    var res: T = 0;
+    for (slice) |item| res += item;
+    return res;
+}