From 7fcae5c1c7bdbab7329bf4c5f68529cdfd9e979b Mon Sep 17 00:00:00 2001
From: Patrick Roncagliolo <ronca.pat@gmail.com>
Date: Wed, 11 Oct 2023 17:49:54 +0200
Subject: [PATCH] Mark subscription cb parameter const (#103)

---
 include/message_filters/subscriber.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/message_filters/subscriber.h b/include/message_filters/subscriber.h
index cd3d644..719452e 100644
--- a/include/message_filters/subscriber.h
+++ b/include/message_filters/subscriber.h
@@ -307,7 +307,7 @@ class Subscriber
       qos_ = qos;
       options_ = options;
       sub_ = node->template create_subscription<M>(topic, rclcpp_qos,
-          [this](std::shared_ptr<MessageType const> msg) {
+          [this](const std::shared_ptr<MessageType const> msg) {
             this->cb(EventType(msg));
           }, options);