sam/record/data/field/tag: Add const initializer

[zaeleus]

How do we avoid the .parse().unwrap() on? I'd like to have the whole expression be constant.

    data.insert(
        "x1".parse().unwrap(),
        noodles::sam::record::data::field::Value::from(value),
    );

Originally posted by @nh13 in https://github.com/zaeleus/noodles/issues/197#issuecomment-1724912818

---

sam::record::data::field::Tag should have a const fn initializer to use in const contexts, e.g.,

const X1: Tag = match Tag::new([b'X', b'1']) {
    Some(tag) => tag,
    None => unreachable!(),
};

data.insert(X1, Value::from(0));

[nh13]

Thank you! Wow!

[zaeleus]

This is now available in noodles 0.52.0 / noodles-sam 0.43.0.