C++ Doxygen has broken examples

[judfs]

https://lcm-proj.github.io/lcm/doxygen_output/c_cpp/html/classlcm_1_1LCM.html#aa18a362fee1eae7e84387eea98c2575f

#include <lcm/lcm-cpp.hpp>
 
void onMessage(const [lcm::ReceiveBuffer](https://lcm-proj.github.io/lcm/doxygen_output/c_cpp/html/structlcm_1_1ReceiveBuffer.html)* rbuf, const std::string& channel, void*) {
  // do something with the message.  Raw message bytes are
  // accessible via rbuf->data
}
 
int main(int argc, char** argv) {
  LCM::lcm lcm;
  lcm.subscribe("CHANNEL", onMessage, NULL);
  while(true)
    lcm.handle();
  return 0;
}

Replace the contents of examples/cpp/listener.cpp with the above and you get

lcm/examples/cpp/listener.cpp:9:3: error: ‘LCM’ has not been declared
    9 |   LCM::lcm lcm;

Fix it to lcm::LCM lcm and then you get:

lcm/examples/cpp/listener.cpp:10:16: error: no matching function for call to ‘lcm::LCM::subscribe(const char [8], void (&)(const lcm::ReceiveBuffer*, const string&, void*), NULL)’
   10 |   lcm.subscribe("CHANNEL", onMessage, NULL);

I suspect there's more where this is found.