Trait trie_db::HashDBRef[−][src]

pub trait HashDBRef<H, T> where
    H: Hasher, {
    fn get(
        &self, 
        key: &<H as Hasher>::Out, 
        prefix: (&[u8], Option<u8>)
    ) -> Option<T>;

    fn contains(
        &self, 
        key: &<H as Hasher>::Out, 
        prefix: (&[u8], Option<u8>)
    ) -> bool;
}
Expand description

Trait for immutable reference of HashDB.

Required methods

fn get(
    &self,
    key: &<H as Hasher>::Out,
    prefix: (&[u8], Option<u8>)
) -> Option<T>[src]

Look up a given hash into the bytes that hash to it, returning None if the hash is not known.

fn contains(
    &self,
    key: &<H as Hasher>::Out,
    prefix: (&[u8], Option<u8>)
) -> bool[src]

Check for the existance of a hash-key.

Implementors

impl<'a, H, T> HashDBRef<H, T> for &'a (dyn HashDB<H, T> + 'a) where
    H: Hasher, [src]

pub fn get(
    &self,
    key: &<H as Hasher>::Out,
    prefix: (&[u8], Option<u8>)
) -> Option<T>[src]

pub fn contains(
    &self,
    key: &<H as Hasher>::Out,
    prefix: (&[u8], Option<u8>)
) -> bool[src]

impl<'a, H, T> HashDBRef<H, T> for &'a mut (dyn HashDB<H, T> + 'a) where
    H: Hasher, [src]

pub fn get(
    &self,
    key: &<H as Hasher>::Out,
    prefix: (&[u8], Option<u8>)
) -> Option<T>[src]

pub fn contains(
    &self,
    key: &<H as Hasher>::Out,
    prefix: (&[u8], Option<u8>)
) -> bool[src]