Trait Estimator

pub trait Estimator<L: EstimationLogic + ?Sized>: AsRef<L::Backend> {
    type OwnedEstimator: EstimatorMut<L>;

    // Required methods
    fn logic(&self) -> &L;
    fn estimate(&self) -> f64;
    fn into_owned(self) -> Self::OwnedEstimator;
}

An immutable estimator.

Immutable estimators are usually immutable views over some larger structure, or they contain some useful immutable state that can be reused.

An estimator must implement AsRef so to return a reference to its backend.

Required Associated Types

type OwnedEstimator: EstimatorMut<L>

The type returned by Estimator::into_owned.

Required Methods

fn logic(&self) -> &L

Returns the logic of the estimator.

fn estimate(&self) -> f64

Returns an estimation of the number of distinct elements that have been added to the estimator so far.

fn into_owned(self) -> Self::OwnedEstimator

Converts this estimator into an owned version capable of mutation.

Implementors

impl<L: EstimationLogic + Clone, BL: Borrow<L>, B: AsRef<L::Backend>> Estimator<L> for DefaultEstimator<L, BL, B>

type OwnedEstimator = DefaultEstimator<L, L, Box<<L as EstimationLogic>::Backend>>