macro_rules! log { (target: $target:expr, $lvl:expr, $($key:tt = $value:expr),+; $($arg:tt)+) => { ... }; (target: $target:expr, $lvl:expr, $($arg:tt)+) => { ... }; ($lvl:expr, $($arg:tt)+) => { ... }; }
Expand description
The standard logging macro.
This macro will generically log with the specified Level
and format!
based argument list.
§Examples
ⓘ
use log::{log, Level};
let data = (42, "Forty-two");
let private_data = "private";
log!(Level::Error, "Received errors: {}, {}", data.0, data.1);
log!(target: "app_events", Level::Warn, "App warning: {}, {}, {}",
data.0, data.1, private_data);