macro_rules! register_gauge { ($OPTS:expr $(,)?) => { ... }; ($NAME:expr, $HELP:expr $(,)?) => { ... }; }
Create a Gauge and registers to default registry.
Gauge
let opts = opts!("test_macro_gauge", "help"); let res1 = register_gauge!(opts); assert!(res1.is_ok()); let res2 = register_gauge!("test_macro_gauge_2", "help"); assert!(res2.is_ok());