From e72f3f262355323d993fcb70142e9b100f893a98 Mon Sep 17 00:00:00 2001
From: BrandonPacewic <92102436+BrandonPacewic@users.noreply.github.com>
Date: Tue, 27 Jan 2026 00:33:49 -0800
Subject: [PATCH] test: added `y_combinator` test

---
 cpl/inc/xutility.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cpl/inc/xutility.h b/cpl/inc/xutility.h
index 1705464..cffc850 100644
--- a/cpl/inc/xutility.h
+++ b/cpl/inc/xutility.h
@@ -8,6 +8,9 @@
 #define XUTILITY_H_
 #include "xcore.h"
 
+#include <functional>
+#include <type_traits>
+
 CPL_BEGIN
 
 // The following effectively implements recursive lambdas.