util: remove ndn::optional, use std::optional directly
Change-Id: I503e8f250e80e0ff7708070effc2e84e3b38b3b7
diff --git a/tests/test-common.cpp b/tests/test-common.cpp
index 7041406..b0d06ea 100644
--- a/tests/test-common.cpp
+++ b/tests/test-common.cpp
@@ -1,6 +1,6 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
- * Copyright (c) 2013-2020 Regents of the University of California.
+ * Copyright (c) 2013-2023 Regents of the University of California.
*
* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
*
@@ -25,8 +25,8 @@
namespace tests {
shared_ptr<Interest>
-makeInterest(const Name& name, bool canBePrefix, optional<time::milliseconds> lifetime,
- optional<Interest::Nonce> nonce)
+makeInterest(const Name& name, bool canBePrefix, std::optional<time::milliseconds> lifetime,
+ std::optional<Interest::Nonce> nonce)
{
auto interest = std::make_shared<Interest>(name);
interest->setCanBePrefix(canBePrefix);