复现已有算法

third_party/drogon_repo/drogon_ctl/version.h

@@ -0,0 +1,42 @@
+/**
+ *
+ *  version.h
+ *  An Tao
+ *
+ *  Copyright 2018, An Tao.  All rights reserved.
+ *  https://github.com/an-tao/drogon
+ *  Use of this source code is governed by a MIT license
+ *  that can be found in the License file.
+ *
+ *  Drogon
+ *
+ */
+
+#pragma once
+
+#include <drogon/DrObject.h>
+#include "CommandHandler.h"
+using namespace drogon;
+
+namespace drogon_ctl
+{
+class version : public DrObject<version>, public CommandHandler
+{
+  public:
+    void handleCommand(std::vector<std::string> &parameters) override;
+
+    std::string script() override
+    {
+        return "display version of this tool";
+    }
+
+    bool isTopCommand() override
+    {
+        return true;
+    }
+
+    version()
+    {
+    }
+};
+}  // namespace drogon_ctl