Added TSelf alias

Author: GrigoriyPA

ydb/library/conclusion/generic/status.h

@@ -81,11 +81,12 @@ class TConclusionStatusGenericImpl {
 template <class TStatus, TStatus StatusOk, TStatus DefaultError>
 class TConclusionStatusImpl : public TConclusionStatusGenericImpl<TStatus, StatusOk, DefaultError, TString, TConclusionStatusImpl<TStatus, StatusOk, DefaultError>> {
 protected:
-    friend class TConclusionStatusGenericImpl<TStatus, StatusOk, DefaultError, TString, TConclusionStatusImpl<TStatus, StatusOk, DefaultError>>;
-
-    using TBase = TConclusionStatusGenericImpl<TStatus, StatusOk, DefaultError, TString, TConclusionStatusImpl<TStatus, StatusOk, DefaultError>>;
+    using TSelf = TConclusionStatusImpl<TStatus, StatusOk, DefaultError>;
+    using TBase = TConclusionStatusGenericImpl<TStatus, StatusOk, DefaultError, TString, TSelf>;
     using TBase::TBase;
 
+    friend class TConclusionStatusGenericImpl<TStatus, StatusOk, DefaultError, TString, TSelf>;
+
     TConclusionStatusImpl() = default;
 
     TConclusionStatusImpl(const char* errorMessage, TStatus status = DefaultError)
@@ -109,11 +110,12 @@ class TConclusionStatusImpl : public TConclusionStatusGenericImpl<TStatus, Statu
 template <class TStatus, TStatus StatusOk, TStatus DefaultError>
 class TYQLConclusionStatusImpl : public TConclusionStatusGenericImpl<TStatus, StatusOk, DefaultError, NYql::TIssues, TYQLConclusionStatusImpl<TStatus, StatusOk, DefaultError>> {
 protected:
-    friend class TConclusionStatusGenericImpl<TStatus, StatusOk, DefaultError, NYql::TIssues, TYQLConclusionStatusImpl<TStatus, StatusOk, DefaultError>>;
-
-    using TBase = TConclusionStatusGenericImpl<TStatus, StatusOk, DefaultError, NYql::TIssues, TYQLConclusionStatusImpl<TStatus, StatusOk, DefaultError>>;
+    using TSelf = TYQLConclusionStatusImpl<TStatus, StatusOk, DefaultError>;
+    using TBase = TConclusionStatusGenericImpl<TStatus, StatusOk, DefaultError, NYql::TIssues, TSelf>;
     using TBase::TBase;
 
+    friend class TConclusionStatusGenericImpl<TStatus, StatusOk, DefaultError, NYql::TIssues, TSelf>;
+
     TYQLConclusionStatusImpl() = default;
 
     TYQLConclusionStatusImpl(const TString& errorMessage, TStatus status = DefaultError)