Include utility

GabrielDosReis · GabrielDosReis · commit 04b7f6a872fd · 2025-08-23T13:32:09.000-07:00
to access `to_underlying`
diff --git a/src/input.cxx b/src/input.cxx
@@ -15,6 +15,7 @@
 
 #include <assert.h>
 #include <iostream>
+#include <utility>
 #include "ipr/input"
 
 namespace ipr::input {
