text-grid 0.4.1

fn main() {
    use text_grid::*;
    struct RowData {
        a: u32,
        b_1: u32,
        b_2: u32,
    }
    impl Cells for RowData {
        fn fmt(f: &mut CellsFormatter<Self>) {
            f.column("a", |s| s.a);
            f.column_with("b", |f| {
                f.column("1", |s| s.b_1);
                f.column("2", |s| s.b_2);
            });
        }
    }
    let rows = [
        RowData {
            a: 300,
            b_1: 10,
            b_2: 20,
        },
        RowData {
            a: 300,
            b_1: 1,
            b_2: 500,
        },
    ];
    print!("{}", to_grid(rows));
}