slog-expression.rs

#[macro_use]
extern crate slog;
extern crate slog_term;

use slog::DrainExt;

#[derive(Debug)]
enum Topic {
    First,
    Second,
    Third,
}

macro_rules! debugify
    { ($v:path) => (format!("{:?}", $v)) }

fn main() {
    let drain = slog_term::streamer().compact().build().fuse();

    let log = slog::Logger::root(drain, o!("version" => "0.5"));
    warn!(log, "topic" => debugify!(Topic::First); "message");
    warn!(log, "message"; "topic" => debugify!(Topic::First));

}