YT-22885: DEFINE_ENUM_UNKNOWN_VALUE, string-related conversions

commit_hash:14c7e42422af750383f04855b4a7ea6b267b92d2

1 files changed, 15 insertions, 0 deletions

diff --git a/library/cpp/yt/misc/enum-inl.h b/library/cpp/yt/misc/enum-inl.h
index 5e1d04da1f..6ad9273293 100644
--- a/library/cpp/yt/misc/enum-inl.h
+++ b/library/cpp/yt/misc/enum-inl.h
@@ -38,6 +38,14 @@ namespace NYT {
 
 ////////////////////////////////////////////////////////////////////////////////
 
+template <class T>
+constexpr std::optional<T> TryGetEnumUnknownValueImpl(T)
+{
+    return std::nullopt;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
 namespace NDetail {
 
 template <typename TValues>
@@ -262,6 +270,13 @@ TStringBuf TEnumTraits<T, true>::GetTypeName()
 }
 
 template <class T>
+constexpr std::optional<T> TEnumTraits<T, true>::TryGetUnknownValue()
+{
+    using NYT::TryGetEnumUnknownValueImpl;
+    return TryGetEnumUnknownValueImpl(T());
+}
+
+template <class T>
 std::optional<T> TEnumTraits<T, true>::FindValueByLiteral(TStringBuf literal)
 {
     return TEnumTraitsImpl<T>::FindValueByLiteral(literal);