Struct dyn_cache::CacheMiss [−][src]
pub struct CacheMiss<'k, Key: ?Sized, Scope, Input, Output, H = DefaultHashBuilder> { /* fields omitted */ }
The result of a failed attempt to retrieve a value from the cache.
Initialize a full CacheEntry
for storage with CacheMiss::init
.
use dyn_cache::local::LocalCache; let mut cache = LocalCache::default(); let (scope, arg) = (&'a', &1); let miss = cache.get(scope, arg).expect_err("first access will always be a miss");
Implementations
impl<'k, Key: ?Sized, Scope, Input, Output, H> CacheMiss<'k, Key, Scope, Input, Output, H>
[src]
impl<'k, Key: ?Sized, Scope, Input, Output, H> CacheMiss<'k, Key, Scope, Input, Output, H>
[src]pub fn init<R>(
self,
query: impl FnOnce(&Input) -> (Output, R)
) -> (CacheEntry<'k, Key, Scope, Input, Output, H>, R)
[src]
self,
query: impl FnOnce(&Input) -> (Output, R)
) -> (CacheEntry<'k, Key, Scope, Input, Output, H>, R)
Prepare the cache miss to be populated by running query(arg)
,
returning a separate value. The value returned (R
) is typically
derived in some way from the stored Output
.
let (entry, result): (_, Vec<usize>) = miss.init(|&n| { let v: Vec<usize> = vec![n; n]; (v.clone(), v) }); cache.store(entry); assert_eq!(result, vec![1usize]);
Trait Implementations
impl<'k, Key: Clone + ?Sized, Scope: Clone, Input: Clone, Output: Clone, H: Clone> Clone for CacheMiss<'k, Key, Scope, Input, Output, H>
[src]
impl<'k, Key: Clone + ?Sized, Scope: Clone, Input: Clone, Output: Clone, H: Clone> Clone for CacheMiss<'k, Key, Scope, Input, Output, H>
[src]impl<'k, Key: ?Sized, Scope, Input, Output, H> Debug for CacheMiss<'k, Key, Scope, Input, Output, H> where
Key: Debug,
Scope: Debug,
Input: Debug,
[src]
impl<'k, Key: ?Sized, Scope, Input, Output, H> Debug for CacheMiss<'k, Key, Scope, Input, Output, H> where
Key: Debug,
Scope: Debug,
Input: Debug,
[src]impl<'k, Key: Eq + ?Sized, Scope: Eq, Input: Eq, Output: Eq, H: Eq> Eq for CacheMiss<'k, Key, Scope, Input, Output, H>
[src]
impl<'k, Key: Eq + ?Sized, Scope: Eq, Input: Eq, Output: Eq, H: Eq> Eq for CacheMiss<'k, Key, Scope, Input, Output, H>
[src]impl<'k, Key: PartialEq + ?Sized, Scope: PartialEq, Input: PartialEq, Output: PartialEq, H: PartialEq> PartialEq<CacheMiss<'k, Key, Scope, Input, Output, H>> for CacheMiss<'k, Key, Scope, Input, Output, H>
[src]
impl<'k, Key: PartialEq + ?Sized, Scope: PartialEq, Input: PartialEq, Output: PartialEq, H: PartialEq> PartialEq<CacheMiss<'k, Key, Scope, Input, Output, H>> for CacheMiss<'k, Key, Scope, Input, Output, H>
[src]impl<'k, Key: ?Sized, Scope, Input, Output, H> StructuralEq for CacheMiss<'k, Key, Scope, Input, Output, H>
[src]
impl<'k, Key: ?Sized, Scope, Input, Output, H> StructuralEq for CacheMiss<'k, Key, Scope, Input, Output, H>
[src]impl<'k, Key: ?Sized, Scope, Input, Output, H> StructuralPartialEq for CacheMiss<'k, Key, Scope, Input, Output, H>
[src]
impl<'k, Key: ?Sized, Scope, Input, Output, H> StructuralPartialEq for CacheMiss<'k, Key, Scope, Input, Output, H>
[src]Auto Trait Implementations
impl<'k, Key, Scope, Input, Output, H = RandomState> !RefUnwindSafe for CacheMiss<'k, Key, Scope, Input, Output, H>
impl<'k, Key, Scope, Input, Output, H = RandomState> !RefUnwindSafe for CacheMiss<'k, Key, Scope, Input, Output, H>
impl<'k, Key: ?Sized, Scope, Input, Output, H> Send for CacheMiss<'k, Key, Scope, Input, Output, H> where
H: Send,
Input: Send,
Key: Sync,
Output: Send,
Scope: Send,
impl<'k, Key: ?Sized, Scope, Input, Output, H> Send for CacheMiss<'k, Key, Scope, Input, Output, H> where
H: Send,
Input: Send,
Key: Sync,
Output: Send,
Scope: Send,
impl<'k, Key: ?Sized, Scope, Input, Output, H> Sync for CacheMiss<'k, Key, Scope, Input, Output, H> where
H: Sync,
Input: Sync,
Key: Sync,
Output: Sync,
Scope: Sync,
impl<'k, Key: ?Sized, Scope, Input, Output, H> Sync for CacheMiss<'k, Key, Scope, Input, Output, H> where
H: Sync,
Input: Sync,
Key: Sync,
Output: Sync,
Scope: Sync,
impl<'k, Key: ?Sized, Scope, Input, Output, H> Unpin for CacheMiss<'k, Key, Scope, Input, Output, H> where
H: Unpin,
Input: Unpin,
Output: Unpin,
Scope: Unpin,
impl<'k, Key: ?Sized, Scope, Input, Output, H> Unpin for CacheMiss<'k, Key, Scope, Input, Output, H> where
H: Unpin,
Input: Unpin,
Output: Unpin,
Scope: Unpin,
impl<'k, Key, Scope, Input, Output, H = RandomState> !UnwindSafe for CacheMiss<'k, Key, Scope, Input, Output, H>
impl<'k, Key, Scope, Input, Output, H = RandomState> !UnwindSafe for CacheMiss<'k, Key, Scope, Input, Output, H>