Rename dummy signature classes to structs

- Class -> struct
- Remove useless friends
commit_hash:87aa0c648bf31795c35bac54d546df46611c8e1e

Author: p4vook

yt/yt/client/signature/generator.cpp

@@ -20,10 +20,9 @@ TSignaturePtr ISignatureGenerator::Sign(TYsonString data)
 
 ////////////////////////////////////////////////////////////////////////////////
 
-class TDummySignatureGenerator
+struct TDummySignatureGenerator
     : public ISignatureGenerator
 {
-public:
     void Sign(const TSignaturePtr& signature) override
     {
         signature->Header_ = NYson::TYsonString("DummySignature"_sb);
@@ -37,10 +36,9 @@ ISignatureGeneratorPtr CreateDummySignatureGenerator()
 
 ////////////////////////////////////////////////////////////////////////////////
 
-class TAlwaysThrowingSignatureGenerator
+struct TAlwaysThrowingSignatureGenerator
     : public ISignatureGenerator
 {
-public:
     void Sign(const TSignaturePtr& /*signature*/) override
     {
         THROW_ERROR_EXCEPTION("Signature generation is unsupported");

yt/yt/client/signature/generator.h

@@ -8,20 +8,14 @@ namespace NYT::NSignature {
 
 ////////////////////////////////////////////////////////////////////////////////
 
-class ISignatureGenerator
+struct ISignatureGenerator
     : public TRefCounted
 {
-public:
     //! Fills out the Signature_ and Header_ fields in a given TSignature
     //! based on its payload.
     virtual void Sign(const TSignaturePtr& signature) = 0;
 
     [[nodiscard]] TSignaturePtr Sign(NYson::TYsonString data);
-
-private:
-    friend class TSignatureGenerator;
-    friend class TDummySignatureGenerator;
-    friend class TAlwaysThrowingSignatureGenerator;
 };
 
 DEFINE_REFCOUNTED_TYPE(ISignatureGenerator)

yt/yt/client/signature/public.h

@@ -10,8 +10,8 @@ DECLARE_REFCOUNTED_CLASS(TSignature)
 
 ///////////////////////////////////////////////////////////////////////////////
 
-DECLARE_REFCOUNTED_CLASS(ISignatureGenerator)
-DECLARE_REFCOUNTED_CLASS(ISignatureValidator)
+DECLARE_REFCOUNTED_STRUCT(ISignatureGenerator)
+DECLARE_REFCOUNTED_STRUCT(ISignatureValidator)
 
 ///////////////////////////////////////////////////////////////////////////////
 

yt/yt/client/signature/signature.h

@@ -27,15 +27,15 @@ class TSignature final
     NYson::TYsonString Payload_;
     std::vector<std::byte> Signature_;
 
-    friend class ISignatureGenerator;
+    friend struct ISignatureGenerator;
+    friend struct TDummySignatureGenerator;
+    friend struct TAlwaysThrowingSignatureGenerator;
     friend class TSignatureGenerator;
-    friend class TDummySignatureGenerator;
-    friend class TAlwaysThrowingSignatureGenerator;
 
-    friend class ISignatureValidator;
+    friend struct ISignatureValidator;
+    friend struct TDummySignatureValidator;
+    friend struct TAlwaysThrowingSignatureValidator;
     friend class TSignatureValidator;
-    friend class TDummySignatureValidator;
-    friend class TAlwaysThrowingSignatureValidator;
 
     friend void Serialize(const TSignature& signature, NYson::IYsonConsumer* consumer);
     friend void Deserialize(TSignature& signature, NYTree::INodePtr node);

yt/yt/client/signature/validator.cpp

@@ -8,10 +8,9 @@ namespace NYT::NSignature {
 
 ////////////////////////////////////////////////////////////////////////////////
 
-class TDummySignatureValidator
+struct TDummySignatureValidator
     : public ISignatureValidator
 {
-public:
     TFuture<bool> Validate(const TSignaturePtr& signature) override
     {
         YT_VERIFY(signature->Header_.ToString() == "DummySignature");
@@ -26,10 +25,9 @@ ISignatureValidatorPtr CreateDummySignatureValidator()
 
 ////////////////////////////////////////////////////////////////////////////////
 
-class TAlwaysThrowingSignatureValidator
+struct TAlwaysThrowingSignatureValidator
     : public ISignatureValidator
 {
-public:
     TFuture<bool> Validate(const TSignaturePtr& /*signature*/) override
     {
         THROW_ERROR_EXCEPTION("Signature validation is unsupported");

yt/yt/client/signature/validator.h

@@ -10,10 +10,9 @@ namespace NYT::NSignature {
 
 ////////////////////////////////////////////////////////////////////////////////
 
-class ISignatureValidator
+struct ISignatureValidator
     : public TRefCounted
 {
-public:
     virtual TFuture<bool> Validate(const TSignaturePtr& signature) = 0;
 };