use tracing_subscriber::prelude::*;
fn main() {
let subscriber = tracing_subscriber::registry().with(tracing_ndjson::layer());
tracing::subscriber::set_global_default(subscriber).unwrap();
tracing::info!(life = 42, "Hello, world!");
let span = tracing::info_span!("hello", "request.uri" = "https://example.com");
span.in_scope(|| {
tracing::info!("Hello, world!");
});
}