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//! A base trait to expose a precomputed hash for a type.
/// A trait to expose a precomputed hash for a type.
pub trait PrecomputedHash {
// TODO(emilio): Perhaps an associated type would be on point here.
/// Return the precomputed hash for this item.
fn precomputed_hash(&self) -> u32;
}
// These are equivalent to the `std::Hash` impls.
impl<'a, T: PrecomputedHash> PrecomputedHash for &'a T {
fn precomputed_hash(&self) -> u32 {
(**self).precomputed_hash()
}
}
impl<'a, T: PrecomputedHash> PrecomputedHash for &'a mut T {
fn precomputed_hash(&self) -> u32 {
(**self).precomputed_hash()
}
}