Function try_for_each_valid_idx

arrow-buffer/src/util/bit_iterator.rs:396–412

(
    len: usize,
    offset: usize,
    null_count: usize,
    nulls: Option<&[u8]>,
    f: F,
)

/// [not possible]: https://github.com/rust-lang/rust/issues/69595
#[inline]
pub fn try_for_each_valid_idx<E, F: FnMut(usize) -> Result<(), E>>(
    len: usize,
    offset: usize,
    null_count: usize,
    nulls: Option<&[u8]>,
    f: F,
) -> Result<(), E> {
    let valid_count = len - null_count;

    if valid_count == len {
        (0..len).try_for_each(f)
    } else if null_count != len {
        BitIndexIterator::new(nulls.unwrap(), offset, len).try_for_each(f)
    } else {
        Ok(())
    }
}

// Note: further tests located in arrow_select::filter module