Core/Misc: Allow formatting optionals with Trinity::StringFormat

1 files changed, 15 insertions, 1 deletions

diff --git a/src/common/Utilities/StringFormat.h b/src/common/Utilities/StringFormat.h
index d34528a04df..fd31ddc28d5 100644
--- a/src/common/Utilities/StringFormat.h
+++ b/src/common/Utilities/StringFormat.h
@@ -18,7 +18,8 @@
 #ifndef TRINITYCORE_STRING_FORMAT_H
 #define TRINITYCORE_STRING_FORMAT_H
 
-#include "fmt/core.h"
+#include "Optional.h"
+#include <fmt/core.h>
 
 namespace Trinity
 {
@@ -108,4 +109,17 @@ namespace Trinity
     }
 }
 
+template<typename T, typename Char>
+struct fmt::formatter<Optional<T>, Char> : formatter<T, Char>
+{
+    template<typename FormatContext>
+    auto format(Optional<T> const& value, FormatContext& ctx) const -> decltype(ctx.out())
+    {
+        if (value.has_value())
+            return formatter<T, Char>::format(*value, ctx);
+
+        return formatter<std::string_view, Char>().format("(nullopt)", ctx);
+    }
+};
+
 #endif