first commit

include/sp/protocol/command/CommandVisitor.h

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+#pragma once
+
+/**
+ * \file CommandVisitor.h
+ * \brief File containing the sp::protocol::CommandVisitor class
+ */
+
+#include <sp/protocol/command/Commands.h>
+
+namespace sp {
+namespace protocol {
+
+#define DeclareCommand(CommandName, ...)                                                                                              \
+	/** This function is called when the packet processed by CommandVisitor::Check is a CommandName */                                \
+	virtual void Visit(const commands::CommandName&) {}
+
+/**
+ * \class CommandVisitor
+ * \brief This class uses double-dispatch in order to find the real type of a packet
+ */
+class CommandVisitor : private NonCopyable {
+  protected:
+	CommandVisitor() {}
+	virtual ~CommandVisitor() {}
+
+  public:
+	/**
+	 * \brief Calls the right CommandVisitor::Visit method corresponding to the real type of the packet
+	 * \param packet the Command to visit
+	 */
+	void Check(const Command& packet);
+
+	DeclareAllCommand()
+};
+
+#undef DeclareCommand
+
+}  // namespace protocol
+}  // namespace sp