复现已有算法

third_party/drogon_repo/lib/src/ConfigLoader.h

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+/**
+ *
+ *  ConfigLoader.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 <json/json.h>
+#include <string>
+#include <trantor/utils/NonCopyable.h>
+
+namespace drogon
+{
+class ConfigLoader : public trantor::NonCopyable
+{
+  public:
+    explicit ConfigLoader(const std::string &configFile) noexcept(false);
+    explicit ConfigLoader(const Json::Value &data);
+    explicit ConfigLoader(Json::Value &&data);
+    ~ConfigLoader();
+
+    const Json::Value &jsonValue() const
+    {
+        return configJsonRoot_;
+    }
+
+    void load() noexcept(false);
+
+  private:
+    std::string configFile_;
+    Json::Value configJsonRoot_;
+};
+}  // namespace drogon