Struct SeenHashes 

pub struct SeenHashes<L: TrieLayout> { /* private fields */ }

Hashes of items already emitted by encode_compact_skip_duplicates, so later occurrences keep a plain hash reference instead of being emitted again.

Node and value hashes are kept in separate namespaces: skipping a node drops its whole subtree and is only sound once that subtree was emitted, which a value can never guarantee. A shared set would let a value equal to a node’s encoding trigger the skip and drop the subtree.

Trait Implementations

impl<L: TrieLayout> Clone for SeenHashes<L>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<L: TrieLayout> Default for SeenHashes<L>

fn default() -> Self

Returns the “default value” for a type.