Function try_pair_with_slice

utils/src/try_iter.rs:14–34

Maps supplied iterator and attempts to pair each `Ok(_)` item with an item from the slice which has provided index. Returns `Err` containing an invalid index in case slice length is exceeded.

(
    iter: I,
    pair_with: &'pairs [P],
)

/// Maps supplied iterator and attempts to pair each `Ok(_)` item with an item from the slice which has provided index.
/// Returns `Err` containing an invalid index in case slice length is exceeded.
pub fn try_pair_with_slice<'iter, 'pairs, I, OK, E, P>(
    iter: I,
    pair_with: &'pairs [P],
) -> impl Iterator<Item = Result<(&'pairs P, OK), E>> + 'iter
where
    'pairs: 'iter,
    OK: 'iter,
    I: IntoIterator<Item = Result<(usize, OK), E>> + 'iter,
    E: From<IndexIsOutOfBounds>,
{
    iter.into_iter().map(|indexed_item| {
        let (index, item) = indexed_item?;

        let pair = pair_with.get(index).ok_or(IndexIsOutOfBounds {
            index,
            length: pair_with.len(),
        })?;

        Ok((pair, item))
    })
}

/// Trait allowing to accumulatively validate supplied sequence of items.
pub trait SeqValidator<I> {