From 295f405755a2b0d3f4536bbba5b9857082efcd5f Mon Sep 17 00:00:00 2001
From: Luca Della Vedova <luca@openrobotics.org>
Date: Mon, 20 Jun 2022 16:37:09 +0800
Subject: [PATCH] Change return from nullopt to empty data structure (#83)

Signed-off-by: Luca Della Vedova <luca@openrobotics.org>
---
 rmf_traffic/src/rmf_traffic/schedule/Mirror.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rmf_traffic/src/rmf_traffic/schedule/Mirror.cpp b/rmf_traffic/src/rmf_traffic/schedule/Mirror.cpp
index aaa1f7db..238024a2 100644
--- a/rmf_traffic/src/rmf_traffic/schedule/Mirror.cpp
+++ b/rmf_traffic/src/rmf_traffic/schedule/Mirror.cpp
@@ -281,7 +281,7 @@ std::optional<ItineraryView> Mirror::get_itinerary(
     // this participant but never received a state. In that case we should
     // return an empty itinerary, not a nullopt.
     if (_pimpl->participant_ids.count(participant_id) > 0)
-      return {};
+      return ItineraryView{};
 
     return std::nullopt;
   }