Return std::optional in RobotDriver::get_error() #165
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This is to keep up with a change in robot_interfaces (to be released in version 2.0). Also refactor a bit.
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Description
This is to keep up with a change in robot_interfaces (to be released in version 2.0).
Also refactor a bit.
How I Tested
On a TriFinger robot (though only with position limit error, board errors are difficult to trigger manually...).