Trait CacheKey

pub trait CacheKey<T: Transformer> {
    // Required methods
    fn to_id(&self) -> <T as Identifiable>::Id;
    fn to_cache_id(&self) -> <T as CachePolicy>::CacheId;

    // Provided methods
    fn eq_key(&self, cache_id: &<T as CachePolicy>::CacheId) -> bool { ... }
    fn hash_cache<H: Hasher>(&self, state: &mut H) { ... }
    fn eq_id(&self, id: &<T as Identifiable>::Id) -> bool { ... }
}

Allows effecient cache lookups with minimal cloning

This is similar to the Equivalent trait

Default implementations have been provided and should be overridden if either to_cache_id() or to_id() are costly

Required Methods

fn to_id(&self) -> <T as Identifiable>::Id

Makes an Id

fn to_cache_id(&self) -> <T as CachePolicy>::CacheId

Makes a CacheId

Provided Methods

fn eq_key(&self, cache_id: &<T as CachePolicy>::CacheId) -> bool

Determines if this is equivalent to the CacheId

fn hash_cache<H: Hasher>(&self, state: &mut H)

Used for hashing the key

fn eq_id(&self, id: &<T as Identifiable>::Id) -> bool

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<'a, T: Transformer, C: CacheKey<T>> CacheKey<T> for &'a C

fn eq_key(&self, cache_id: &<T as CachePolicy>::CacheId) -> bool

fn hash_cache<H: Hasher>(&self, state: &mut H)

fn to_id(&self) -> <T as Identifiable>::Id

fn eq_id(&self, id: &<T as Identifiable>::Id) -> bool

fn to_cache_id(&self) -> <T as CachePolicy>::CacheId

Implementors