Added #include <optional>

d-kad · d-kad · commit 289c6660a888 · 2025-06-24T15:15:30.000+01:00
diff --git a/src/games/gametree.cc b/src/games/gametree.cc
@@ -23,6 +23,7 @@
 #include <iostream>
 #include <algorithm>
 #include <numeric>
+#include <optional>
 
 #include "gambit.h"
 #include "gametree.h"
