build: switch to C++17
Change-Id: Id6217b5c993f3e4726e89773128b565e5f136bb6
diff --git a/tools/ping/server/tracer.hpp b/tools/ping/server/tracer.hpp
index a84b72e..e8aac85 100644
--- a/tools/ping/server/tracer.hpp
+++ b/tools/ping/server/tracer.hpp
@@ -1,6 +1,6 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
- * Copyright (c) 2015-2021, Arizona Board of Regents.
+ * Copyright (c) 2015-2022, Arizona Board of Regents.
*
* This file is part of ndn-tools (Named Data Networking Essential Tools).
* See AUTHORS.md for complete list of ndn-tools authors and contributors.
@@ -26,9 +26,7 @@
#include "ping-server.hpp"
-namespace ndn {
-namespace ping {
-namespace server {
+namespace ndn::ping::server {
/**
* @brief Logs ping responses
@@ -42,8 +40,6 @@
const Options& m_options;
};
-} // namespace server
-} // namespace ping
-} // namespace ndn
+} // namespace ndn::ping::server
#endif // NDN_TOOLS_PING_SERVER_TRACER_HPP