pub type Handler<'a> = dyn FnMut(&[&str]) -> Result<CommandStatus> + 'a;Expand description
Command handler.
It should return the status in case of correct execution. In case of
errors, all the errors will be handled by the REPL, except for
CriticalError, which will be passed up from the REPL.
The handler should validate command arguments and can return ArgsError
to indicate that arguments were wrong.