1 files changed, 8 insertions, 0 deletions
diff --git a/src/utils/optional_bool.cpp b/src/utils/optional_bool.cpp
new file mode 100644
index 0000000..56fdca2
--- /dev/null
+++ b/src/utils/optional_bool.cpp
@@ -0,0 +1,8 @@
+#include <utils/optional_bool.hpp>
+
+
+std::ostream& operator<<(std::ostream& os, const OptionalBool& o)
+{
+  os << o.to_string();
+  return os;
+}