1 files changed, 5 insertions, 0 deletions
diff --git a/include/cru/common/Exception.h b/include/cru/common/Exception.h
index d7e32a5a..06a10030 100644
--- a/include/cru/common/Exception.h
+++ b/include/cru/common/Exception.h
@@ -1,6 +1,8 @@
 #pragma once
 #include "String.h"
 
+#include <optional>
+
 namespace cru {
 #ifdef _MSC_VER
 #pragma warning(disable : 4275)
@@ -23,6 +25,9 @@ class CRU_BASE_API Exception : public std::exception {
  protected:
   void SetMessage(String message) { message_ = std::move(message); }
 
+  void AppendMessage(StringView additional_message);
+  void AppendMessage(std::optional<StringView> additional_message);
+
  private:
   String message_;
   mutable std::string utf8_message_;