Macro log::error

macro_rules! error {
    (target: $target:expr, $($arg:tt)*) => { ... };
    ($($arg:tt)*) => { ... };
}

Logs a message at the error level.

Examples

let (err_info, port) = ("No connection", 22);

error!("Error: {} on port {}", err_info, port);
error!(target: "app_events", "App Error: {}, Port: {}", err_info, 22);