#[warn(inconsistent_digit_grouping)]
#[allow(unused_variables)]
fn main() {
    let good = (123, 1_234, 1_2345_6789, 123_f32, 1_234.12_f32, 1_234.123_4_f32, 1.123_456_7_f32);
    let bad = (1_23_456, 1_234_5678, 1234_567, 1_234.5678_f32, 1.234_5678_f32);
}