build: switch to C++17
Change-Id: Ie68020a04b7e20b74778b6d0370544ded55c5e26
diff --git a/daemon/rib/readvertise/client-to-nlsr-readvertise-policy.cpp b/daemon/rib/readvertise/client-to-nlsr-readvertise-policy.cpp
index ca54132..7aff618 100644
--- a/daemon/rib/readvertise/client-to-nlsr-readvertise-policy.cpp
+++ b/daemon/rib/readvertise/client-to-nlsr-readvertise-policy.cpp
@@ -1,6 +1,6 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
- * Copyright (c) 2014-2018, Regents of the University of California,
+ * Copyright (c) 2014-2022, Regents of the University of California,
* Arizona Board of Regents,
* Colorado State University,
* University Pierre & Marie Curie, Sorbonne University,
@@ -28,14 +28,14 @@
namespace nfd {
namespace rib {
-optional<ReadvertiseAction>
+std::optional<ReadvertiseAction>
ClientToNlsrReadvertisePolicy::handleNewRoute(const RibRouteRef& ribRoute) const
{
if (ribRoute.route->origin == ndn::nfd::ROUTE_ORIGIN_CLIENT) {
return ReadvertiseAction{ribRoute.entry->getName(), ndn::security::SigningInfo()};
}
else {
- return nullopt;
+ return std::nullopt;
}
}