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use super::abstract_mut::AbstractMut; use super::mixed::Mixed; use super::tight::Tight; use super::with_id::LastId; use crate::entity_id::EntityId; #[allow(missing_docs)] pub enum Iter<Storage> { Tight(Tight<Storage>), Mixed(Mixed<Storage>), } impl<Storage: AbstractMut> Iterator for Iter<Storage> where <Storage as AbstractMut>::Index: Clone, { type Item = Storage::Out; #[inline] fn next(&mut self) -> Option<Self::Item> { match self { Iter::Tight(tight) => tight.next(), Iter::Mixed(mixed) => mixed.next(), } } #[inline] fn size_hint(&self) -> (usize, Option<usize>) { match self { Iter::Tight(tight) => tight.size_hint(), Iter::Mixed(mixed) => mixed.size_hint(), } } #[inline] fn fold<B, F>(self, init: B, f: F) -> B where Self: Sized, F: FnMut(B, Self::Item) -> B, { match self { Iter::Tight(tight) => tight.fold(init, f), Iter::Mixed(mixed) => mixed.fold(init, f), } } } impl<Storage: AbstractMut> DoubleEndedIterator for Iter<Storage> where <Storage as AbstractMut>::Index: Clone, { #[inline] fn next_back(&mut self) -> Option<Self::Item> { match self { Iter::Tight(tight) => tight.next_back(), Iter::Mixed(mixed) => mixed.next_back(), } } #[inline] fn rfold<B, F>(self, init: B, f: F) -> B where Self: Sized, F: FnMut(B, Self::Item) -> B, { match self { Iter::Tight(tight) => tight.rfold(init, f), Iter::Mixed(mixed) => mixed.rfold(init, f), } } } impl<Storage: AbstractMut> LastId for Iter<Storage> { #[inline] unsafe fn last_id(&self) -> EntityId { match self { Iter::Tight(tight) => tight.last_id(), Iter::Mixed(mixed) => mixed.last_id(), } } #[inline] unsafe fn last_id_back(&self) -> EntityId { match self { Iter::Tight(tight) => tight.last_id_back(), Iter::Mixed(mixed) => mixed.last_id_back(), } } }