integer-iterator

在 Rust 中实现原始整数类型的迭代器。此外，此 crate 公开了特质，以便用户可以为任何所需类型实现它。

示例

    let mut positive = 1234u32.digits();
    assert_eq!(positive.next(), Some(4));
    assert_eq!(positive.next(), Some(3));
    assert_eq!(positive.next(), Some(2));
    assert_eq!(positive.next(), Some(1));

    let mut negative = (-1234i32).digits();
    assert_eq!(negative.next(), Some(4));
    assert_eq!(negative.next(), Some(3));
    assert_eq!(negative.next(), Some(2));
    assert_eq!(negative.next(), Some(1));