Struct chess::CacheTable [−][src]
Store a cache of entries, each with an associated hash.
Implementations
impl<T: Copy + Clone + PartialEq + PartialOrd> CacheTable<T>
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pub fn new(size: usize, default: T) -> CacheTable<T>
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Create a new CacheTable
with each associated entry initialized with a hash of ‘0’
Note: You must pass in a size where only 1 bit is set. (AKA: 2, 4, 8, 16, 1024, 65536,
etc.)
Panics when size is invalid.
pub fn get(&self, hash: u64) -> Option<T>
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Get a particular entry with the hash specified
pub fn add(&mut self, hash: u64, entry: T)
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Add (or overwrite) an entry with the associated hash
pub fn replace_if<F: Fn(T) -> bool>(&mut self, hash: u64, entry: T, replace: F)
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Replace an entry in the hash table with a user-specified replacement policy specified by
replace
. The replace
closure is called with the previous entry occupying the hash table
slot, and returns true or false to specify whether the entry should be replaced. Note that
the previous entry may not have the same hash, but merely be the default initialization or
a hash collision with hash
.
use chess::CacheTable; let mut table: CacheTable<char> = CacheTable::new(256, 'a'); assert_eq!(table.get(5), None); // Note that 'a' is the default initialization value. table.replace_if(5, 'b', |old_entry| old_entry != 'a'); assert_eq!(table.get(5), None); table.replace_if(5, 'c', |old_entry| old_entry == 'a'); assert_eq!(table.get(5), Some('c')); table.replace_if(5, 'd', |old_entry| old_entry == 'c'); assert_eq!(table.get(5), Some('d'));
Auto Trait Implementations
impl<T> RefUnwindSafe for CacheTable<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> Send for CacheTable<T> where
T: Send,
T: Send,
impl<T> Sync for CacheTable<T> where
T: Sync,
T: Sync,
impl<T> Unpin for CacheTable<T>
impl<T> UnwindSafe for CacheTable<T> where
T: UnwindSafe,
T: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,