Hands on the Tracing Crate in Rust

:dep thiserror = "1.0.25"

use thiserror::Error;

#[derive(Error, Debug)]
pub enum ParseRankError {
    #[error("{0} is not a valid symbol for card rank!")]
    InvalidSymbol(char),
    #[error("{0} is not a valid integer for card rank!")]
    InvalidInteger(u8),
}

:dep tracing = "0.1.26"

use tracing::{debug, error, info, span, warn, Level};

let e = ParseRankError::InvalidSymbol('m');
e

e.to_string()

#[tracing::instrument]
fn f(){
    let e = ParseRankError::InvalidSymbol('m');
    warn!("{}", e);
}
f()

error!("{}", e);

info!("{}", e);

use tracing::error;

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

error!(port, error = %err_info);
error!(target: "app_events", "App Error: {}", err_info);
error!({ info = err_info }, "error on port: {}", port);