ROS2 Dynamic messages template - c++

Question

I have a question regarding ROS2 messages or possibly just standard C++, maybe one of you have tried something similar before, or can tell me that what I am trying to accomplish won't work.
What I'm trying to create is a library that I can use to quickly create a ROS2 Node, dynamically add publishers and/or subscribers, depending on the situation, before starting the node.
The problem I'm facing is that ROS2 uses message types like std_msgs::msg::String. Example source can be found on github.
The source uses the following code to create a subscriber:
subscription_ = this->create_subscription<std_msgs::msg::String>("topic", 10, std::bind(&MinimalSubscriber::topic_callback, this, _1));
I would like to create a function that can create a subscriber using a given message type i.e.:
void createListener(std::string topicName, 'messagetype')
{
auto subscription_ = this->create_subscription<'messagetype'>(topicname, 10, [this]{}, this, _1));
//adding the created subscriber to a list is already done
}
This would allow me to use the same function while still being able to use different messages like:
nav_msgs::msg::Path
geometry_msgs::msg::Point
without having to create a new function for every message type.
I can't seem to find the template type that is used in the create_subscribtion<>() function, all I can find is that each message creates its own type.
std_msgs::msg::String would return the std_msgs::msg::String_<std::allocator<void>> type.
Is there a way that i can make this work?

Answer 1

You could use templates here right, by doing the following:
template <typename MsgType>
void createListener(std::string topicName)
{
auto subscription_ = this->create_subscription<MsgType>(topicname, 10, [this]{}, this, _1));
//adding the created subscriber to a list is already done
}
This function can then be called, for example by:
createListener<nav_msgs::msg::Path>("topicName")