add msg.ToString()

include/sp/default/DefaultPacket.h

@@ -7,12 +7,13 @@ namespace sp {
 class PacketHandler;
 
 using PacketMessage = Message<
-	option::MsgIdType<std::uint8_t>,		// add id() operation
-	option::ReadOperations,					// add read() operation
-	option::WriteOperations,				// add write() operation
-	option::WriteId,						// write id before data
-	option::Handler<PacketHandler>			// add dispatch() operation
->;
+	option::MsgIdType<std::uint8_t>,	// add id() operation
+	option::ReadOperations,										// add read() operation
+	option::WriteOperations,									// add write() operation
+	option::WriteId,											// write id before data
+	option::Handler<PacketHandler>,								// add dispatch() operation
+	option::DebugPrint											// add ToString() operator
+	>;
 
 #define PacketConstructor(packetName)                                                                                                 \
 	packetName##Packet() {}                                                                                                           \
@@ -23,7 +24,8 @@ using PacketMessage = Message<
 
 #define DeclarePacket(packetName)                                                                                                     \
 	class packetName##Packet : public sp::MessageBase<sp::PacketMessage, sp::option::StaticNumIdImpl<packetName>,                     \
-								   sp::option::DispatchImpl<packetName##Packet>, sp::option::FieldsImpl<packetName##Fields>>
+								   sp::option::DispatchImpl<packetName##Packet>, sp::option::FieldsImpl<packetName##Fields>>,         \
+							   sp::option::ToStringImpl<packetName##Packet>
 
 
 

include/sp/protocol/MessageBase.h

@@ -13,4 +13,6 @@ namespace sp {
 template <typename TBase, typename... TOptions>
 class MessageBase : public details::MessageImplBuilder<TBase, TOptions...>::Type {};
 
-}  // namespace sp
+}  // namespace sp
+
+#include <sp/protocol/message/MessagePrinterImpl.h>

include/sp/protocol/MessagePrinter.h

@@ -1,23 +0,0 @@
-#pragma once
-
-#include <ostream>
-#include <sp/common/Reflection.h>
-#include <sp/protocol/message/MessagePrinterImpl.h>
-
-namespace sp {
-
-/**
- * \brief Prints a message in a human readable string
- */
-template <typename TBase, typename... TOptions>
-std::ostream& operator<<(std::ostream& a_Stream, const sp::MessageBase<TBase, TOptions...>& a_Message) {
-	a_Stream 
-		<< sp::GetClassName(a_Message) 
-		<< sp::details::IdPrinter<TOptions...>::PrintMessageId() 
-		<< "["
-		<< sp::details::PrintFields(a_Message.GetFields()) 
-		<< "]";
-	return a_Stream;
-}
-
-} // namespace sp

include/sp/protocol/message/MessageImplBuilder.h

@@ -37,8 +37,12 @@ struct MessageImplBuilder {
 	static const bool HasValidImpl = InterfaceOptions::HasValid && ImplOptions::HasFieldsImpl;
 	using Base6 = typename MessageImplProcessValidFields<Base5, HasValidImpl>::Type;
 
+	// Provide ToStringImpl() if possible
+	static const bool HasToStringImpl = InterfaceOptions::HasToString;
+	using Base7 = typename MessageImplProcessToString<Base6, ImplOptions, HasToStringImpl>::Type;
+
 	// The last BaseN must be taken as final type.
-	using Type = Base6;
+	using Type = Base7;
 };
 
 }  // namespace details

include/sp/protocol/message/MessageImplOptions.h

@@ -16,6 +16,11 @@ struct DispatchImpl {};
 template <typename TFields>
 struct FieldsImpl {};
 
+// Print fields of the message, facilitate implementation of
+// ToStringImpl()
+template <typename TActual>
+struct ToStringImpl {};
+
 }  // namespace option
 
 

include/sp/protocol/message/MessageImplProcess.h

@@ -4,6 +4,20 @@ namespace sp {
 namespace details {
 
 
+// ToString impl
+template <typename TBase, typename ParsedImplOptions, bool TImplement>
+struct MessageImplProcessToString;
+
+template <typename TBase, typename ParsedImplOptions>
+struct MessageImplProcessToString<TBase, ParsedImplOptions, true> {
+	using Type = MessageImplToStringBase<TBase, typename ParsedImplOptions::ActualMessage>;
+};
+
+template <typename TBase, typename ParsedImplOptions>
+struct MessageImplProcessToString<TBase, ParsedImplOptions, false> {
+	using Type = TBase;
+};
+
 
 // id impl
 template <typename TBase, typename ParsedImplOptions, bool TImplement>

include/sp/protocol/message/MessageInterfaceBuilder.h

@@ -33,8 +33,11 @@ struct MessageInterfaceBuilder {
 	// add write id functionality if write id and write was provided
 	using Base7 = typename MessageInterfaceProcessWriteId<Base6, ParsedOptions::HasWriteId && ParsedOptions::HasWriteOperations>::Type;
 
-	// The last Base7 must be taken as final type.
-	using Type = Base7;
+	// add ToString() if HasToString was provided
+	using Base8 = typename MessageInterfaceProcessToString<Base7, ParsedOptions::HasToString>::Type;
+
+	// The last Base8 must be taken as final type.
+	using Type = Base8;
 };
 
 }  // namespace details

include/sp/protocol/message/MessageInterfaceProcess.h

@@ -101,5 +101,19 @@ struct MessageInterfaceProcessWriteId<TBase, false> {
 	using Type = TBase;
 };
 
+// Build to string 
+template <typename TBase, bool THasToString>
+struct MessageInterfaceProcessToString;
+
+template <typename TBase>
+struct MessageInterfaceProcessToString<TBase, true> {
+	using Type = MessageInterfaceToStringBase<TBase>;
+};
+
+template <typename TBase>
+struct MessageInterfaceProcessToString<TBase, false> {
+	using Type = TBase;
+};
+
 }  // namespace details
 }  // namespace sp

include/sp/protocol/message/MessageInterfacesImpl.h

@@ -129,5 +129,17 @@ class MessageInterfaceWriteIdBase : public TBase {
 	}
 };
 
+// Debug print functionality chunk
+template <typename TBase>
+class MessageInterfaceToStringBase : public TBase {
+  public:
+	std::string ToString() const {
+		return ToStringImpl();
+	}
+
+  protected:
+	virtual std::string ToStringImpl() const = 0;
+};
+
 }  // namespace details
 }  // namespace sp

include/sp/protocol/message/MessageInterfacesOptions.h

@@ -16,6 +16,7 @@ struct MessageInterfaceParsedOptions<> {
 	static const bool HasWriteId = false;
 	static const bool HasHandler = false;
 	static const bool HasValid = false;
+	static const bool HasToString = false;
 };
 
 
@@ -59,5 +60,10 @@ struct MessageInterfaceParsedOptions<option::ValidCheckInterface, TOptions...> :
 	static const bool HasValid = true;
 };
 
+template <typename... TOptions>
+struct MessageInterfaceParsedOptions<option::DebugPrint, TOptions...> : public MessageInterfaceParsedOptions<TOptions...> {
+	static const bool HasToString = true;
+};
+
 }  // namespace details
 }  // namespace sp

include/sp/protocol/message/MessageOptions.h

@@ -24,6 +24,9 @@ struct LittleEndian {};
 // Include validity check in public interface
 struct ValidCheckInterface {};
 
+// Add a ToString() method containing fields
+struct DebugPrint {};
+
 // Define handler class
 template <typename T>
 struct Handler {

include/sp/protocol/message/MessagePrinterImpl.h

@@ -1,8 +1,8 @@
 #pragma once
 
 #include <sstream>
-#include <sp/protocol/MessageBase.h>
 #include <sp/common/Templates.h>
+#include <sp/common/Reflection.h>
 
 namespace sp {
 namespace details {
@@ -59,8 +59,8 @@ struct FieldPrinter {
 };
 
 template <unsigned int IAlignment, typename TContainer, typename... TFields>
-struct FieldPrinter<sp::BitField<TContainer, TFields...>, IAlignment> {
-	static std::string PrintField(const sp::Field<sp::BitField<TContainer, TFields...>, IAlignment>& a_Field) {
+struct FieldPrinter<BitField<TContainer, TFields...>, IAlignment> {
+	static std::string PrintField(const Field<BitField<TContainer, TFields...>, IAlignment>& a_Field) {
 		return "BitField<" + GetClassName<TContainer>() + ">[" + PrintFields(a_Field.GetValue().GetFields()) + "]";
 	}
 };
@@ -78,5 +78,11 @@ std::string PrintFields(const std::tuple<TFields...>& a_Fields) {
 	return concat.substr(0, concat.size() - 2);
 }
 
+template <typename TBase, typename... TOptions>
+std::string PrintMessage(const MessageBase<TBase, TOptions...>& a_Message) {
+	return sp::GetClassName(a_Message) + sp::details::IdPrinter<TOptions...>::PrintMessageId() + "[" +
+		   sp::details::PrintFields(a_Message.GetFields()) + "]";
+}
+
 }  // namespace details
 }  // namespace sp

include/sp/protocol/message/MessagesImpl.h

@@ -1,8 +1,24 @@
 #pragma once
 
 namespace sp {
+
+template <typename TBase, typename... TOptions>
+class MessageBase;
+
 namespace details {
 
+template <typename TBase, typename... TOptions>
+std::string PrintMessage(const MessageBase<TBase, TOptions...>& a_Message);
+
+// ID information chunk
+template <typename TBase, typename TActual>
+class MessageImplToStringBase : public TBase {
+  protected:
+	virtual std::string ToStringImpl() const override {
+		return PrintMessage(static_cast<const TActual&>(*this));
+	}
+};
+
 
 
 // ID information chunk
@@ -18,6 +34,8 @@ class MessageImplStaticNumIdBase : public TBase {
 	}
 };
 
+
+
 // Dispatch implementation chunk
 template <typename TBase, typename TActual>
 class MessageImplDispatchBase : public TBase {

test/test_packets.cpp

@@ -5,12 +5,11 @@
 
 #include <sp/default/DefaultPacketDispatcher.h>
 #include <sp/extensions/Extensions.h>
-#include <sp/protocol/MessagePrinter.h>
 
 class KeepAliveHandler : public sp::PacketHandler {
 	void Handle(const KeepAlivePacket& packet) {
 		std::cout << "KeepAlive handled !!\n";
-		std::cout << packet << std::endl;
+		std::cout << packet.ToString() << std::endl;
 	}
 
 	void Handle(const DisconnectPacket& packet) {
@@ -40,7 +39,7 @@ int main() {
 	auto upgradeTower2 = std::make_unique<UpgradeTowerPacket>();
 	upgradeTower2->Read(buffer);
 
-	std::cout << "Test : " << *upgradeTower2 << "\n";
+	std::cout << "Test : " << msg->ToString() << "\n";
 
 	sp::PacketFactory factory;
 	auto packet = factory.CreateMessage(msgId);