Function tracing_subscriber::fmt::init

pub fn init()

Available on crate features fmt and std only.

Install a global tracing subscriber that listens for events and filters based on the value of the RUST_LOG environment variable.

The configuration of the subscriber initialized by this function depends on what feature flags are enabled.

If the tracing-log feature is enabled, this will also install the LogTracer to convert Log records into tracing Events.

If the env-filter feature is enabled, this is shorthand for

tracing_subscriber::fmt()
    .with_env_filter(EnvFilter::from_default_env())
    .init();

Panics

Panics if the initialization was unsuccessful, likely because a global subscriber was already installed by another call to try_init.