build: switch to C++17
Change-Id: Id6217b5c993f3e4726e89773128b565e5f136bb6
diff --git a/tools/ping/client/tracer.hpp b/tools/ping/client/tracer.hpp
index b6b4812..c2d375e 100644
--- a/tools/ping/client/tracer.hpp
+++ b/tools/ping/client/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.
@@ -27,9 +27,7 @@
#include "ping.hpp"
-namespace ndn {
-namespace ping {
-namespace client {
+namespace ndn::ping::client {
/**
* @brief prints ping responses and timeouts
@@ -80,8 +78,6 @@
const Options& m_options;
};
-} // namespace client
-} // namespace ping
-} // namespace ndn
+} // namespace ndn::ping::client
#endif // NDN_TOOLS_PING_CLIENT_TRACER_HPP