Trait std::collections::hash_state::HashState
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pub trait HashState {
type Hasher: Hasher;
fn hasher(&self) -> Self::Hasher;
}A trait representing stateful hashes which can be used to hash keys in a
HashMap.
A HashState is used as a factory for instances of Hasher which a HashMap
can then use to hash keys independently. A HashMap by default uses a state
which will create instances of a SipHasher, but a custom state factory can
be provided to the with_hash_state function.
If a hashing algorithm has no initial state, then the Hasher type for that
algorithm can implement the Default trait and create hash maps with the
DefaultState structure. This state is 0-sized and will simply delegate
to Default when asked to create a hasher.
Associated Types
type Hasher: Hasher
Type of the hasher that will be created.
Required Methods
Implementors
impl HashState for RandomStateimpl<H: Default + Hasher> HashState for DefaultState<H>