refactoring

include/app_config.hpp

@@ -112,6 +112,9 @@ private:
   template <typename dest>
   auto get_value(const json &json_document, const std::string &name, dest &dst,
                  bool &success_flag) -> bool {
+    constexpr const auto *function_name =
+        static_cast<const char *>(__FUNCTION__);
+
     auto ret = false;
     try {
       if (json_document.find(name) != json_document.end()) {
@@ -121,7 +124,7 @@ private:
         success_flag = false;
       }
     } catch (const json::exception &ex) {
-      utils::error::raise_error(__FUNCTION__, ex, "exception occurred");
+      utils::error::raise_error(function_name, ex, "exception occurred");
       success_flag = false;
       ret = false;
     }