Struct ContextMap

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pub struct ContextMap { /* private fields */ }

Expand description

Simple lossy hash table mapping context hashes to state bytes.

Each entry is a single byte (state from StateTable). On collision, the existing entry is silently overwritten.

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impl ContextMap

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pub fn new(size: usize) -> Self

Create a new ContextMap with size entries. size must be a power of 2.

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pub fn get(&self, hash: u32) -> u8

Get the current state for a context hash.

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pub fn set(&mut self, hash: u32, state: u8)

Set the state for a context hash.

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pub fn predict_and_update(&mut self, hash: u32, bit: u8) -> u8

Get state, then update it after observing bit. Returns the state before transition. Also transitions the state in-place.

Auto Trait Implementations§

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impl UnwindSafe for ContextMap

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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