Trait HashStorer

pub trait HashStorer {
    // Required methods
    fn clear(&mut self);
    fn get(&self) -> Option<u64>;
    fn get_or_init<F>(&self, f: F) -> u64
       where F: FnOnce() -> u64;

    // Provided method
    fn hash_one<T, H>(value: &T) -> u64
       where T: ?Sized + Hash,
             H: Hasher + Default,
             Self: Default { ... }
}

storage trait for storing hash status

Required Methods

fn clear(&mut self)

Clear stored hash code to none

fn get(&self) -> Option<u64>

Get stored hash code

fn get_or_init<F>(&self, f: F) -> u64

where F: FnOnce() -> u64,

if stored hash code is uninit, call init func

return inited hash code

Provided Methods

fn hash_one<T, H>(value: &T) -> u64

where T: ?Sized + Hash, H: Hasher + Default, Self: Default,

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl HashStorer for Cell<u64>

fn clear(&mut self)

fn get(&self) -> Option<u64>

fn get_or_init<F>(&self, f: F) -> u64

where F: FnOnce() -> u64,

impl HashStorer for AtomicU64

fn clear(&mut self)

fn get(&self) -> Option<u64>

fn get_or_init<F>(&self, f: F) -> u64

where F: FnOnce() -> u64,

impl<T: HashStorer + Default> HashStorer for Rc<T>

fn get(&self) -> Option<u64>

fn clear(&mut self)

fn get_or_init<F>(&self, f: F) -> u64

where F: FnOnce() -> u64,

fn hash_one<T1, H>(value: &T1) -> u64

where T1: ?Sized + Hash, H: Hasher + Default, Self: Default,

impl<T: HashStorer + Default> HashStorer for Arc<T>

fn get(&self) -> Option<u64>

fn clear(&mut self)

fn get_or_init<F>(&self, f: F) -> u64

where F: FnOnce() -> u64,

fn hash_one<T1, H>(value: &T1) -> u64

where T1: ?Sized + Hash, H: Hasher + Default, Self: Default,

Implementors

impl HashStorer for NoneStorer