| use crate::{page, Shard}; |
| use std::slice; |
| pub struct UniqueIter<'a, T, C: crate::cfg::Config> { |
| pub(super) shards: slice::IterMut<'a, Shard<Option<T>, C>>, |
| pub(super) pages: slice::Iter<'a, page::Shared<Option<T>, C>>, |
| pub(super) slots: Option<page::Iter<'a, T, C>>, |
| } |
| |
| impl<'a, T, C: crate::cfg::Config> Iterator for UniqueIter<'a, T, C> { |
| type Item = &'a T; |
| fn next(&mut self) -> Option<Self::Item> { |
| loop { |
| if let Some(item) = self.slots.as_mut().and_then(|slots| slots.next()) { |
| return Some(item); |
| } |
| |
| if let Some(page) = self.pages.next() { |
| self.slots = page.iter(); |
| } |
| |
| if let Some(shard) = self.shards.next() { |
| self.pages = shard.iter(); |
| } else { |
| return None; |
| } |
| } |
| } |
| } |
