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use rkyv::{Archive, Deserialize};
use crate::link::{ArchivedLink, Link};
use crate::{Annotation, Branch, BranchMut, MaybeArchived, Store, Walker};
pub enum Child<'a, C, A, S>
where
S: Store,
C: Compound<A, S>,
C::Leaf: Archive,
{
Leaf(&'a C::Leaf),
Link(&'a Link<C, A, S>),
Empty,
End,
}
pub enum ArchivedChild<'a, C, A, S>
where
S: Store,
C: Compound<A, S>,
{
Leaf(&'a <C::Leaf as Archive>::Archived),
Link(&'a ArchivedLink<C, A, S>),
Empty,
End,
}
pub enum ChildMut<'a, C, A, S>
where
S: Store,
C: Compound<A, S>,
{
Leaf(&'a mut C::Leaf),
Link(&'a mut Link<C, A, S>),
Empty,
End,
}
pub trait ArchivedCompound<C, A, S>
where
S: Store,
C: Compound<A, S>,
C::Leaf: Archive,
{
fn child(&self, ofs: usize) -> ArchivedChild<C, A, S>;
}
pub trait Compound<A, S>: Sized + Archive {
type Leaf: Archive;
fn child(&self, ofs: usize) -> Child<Self, A, S>
where
S: Store;
fn child_mut(&mut self, ofs: usize) -> ChildMut<Self, A, S>
where
S: Store;
fn walk<'a, W>(&'a self, walker: W) -> Option<Branch<'a, Self, A, S>>
where
S: Store,
Self::Archived: ArchivedCompound<Self, A, S>,
Self::Leaf: Archive,
A: Annotation<Self::Leaf>,
W: Walker<Self, A, S>,
{
Branch::walk(MaybeArchived::Memory(self), walker)
}
fn walk_mut<'a, W>(
&'a mut self,
walker: W,
) -> Option<BranchMut<'a, Self, A, S>>
where
S: Store,
Self: Clone,
Self::Archived: ArchivedCompound<Self, A, S> + Deserialize<Self, S>,
Self::Leaf: Archive,
A: Annotation<Self::Leaf>,
W: Walker<Self, A, S>,
{
BranchMut::walk(self, walker)
}
}
pub trait MutableLeaves {}