Getting list of publishers and subscribers for all ros topics in C++ code

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I want to get the list of all subscribers and publishers for a given topic in C++ code.

I know that in Python, you can do rostopic.get_topic_list() to get this information.

In C++, doing ros::master::getTopics(topics) would only provide information regarding the list of available topics and their datatypes. But it does not provide information on the nodes publishing and subscribing to it. Is there a C++ API for this?