slog::b!

macro_rules! b {
    () => { ... };
    ($($k:expr => $v:expr),*) => { ... };
}

Convenience function for building &[BorrowedKeyValue]

#[macro_use]
extern crate slog;

fn main() {
    let root = slog::Logger::new_root(o!());
    root.info("test info log", b!("log-key" => true));
}