The InputPort/OutputPort infrastructure facilitates safer
data paths between components: OutputPorts store a value
and the age of the value measured in number of control loop
iterations. InputPorts can be connected to various sources,
for instance an OutputPort. InputPorts expose the values to
consumers in the form of std::optional to reflect the fact
that an InputPort can be dangling or connected to a stale
OutputPort.
PAJohnson
Samuel Sadok