Struct LimitApproximator 

pub struct LimitApproximator { /* private fields */ }

Symmetric two-sided limit approximation settings.

Implementations

impl LimitApproximator

pub const fn new(step: f64, tolerance: f64) -> LimitApproximator

Creates a limit approximator from a sample step and comparison tolerance.

pub fn try_new( step: f64, tolerance: f64, ) -> Result<LimitApproximator, CalculusError>

Creates a limit approximator from a finite positive step and a finite non-negative tolerance.

Errors

Returns CalculusError::NonFiniteStep or CalculusError::NonPositiveStep when step is invalid, and returns CalculusError::NonFiniteTolerance or CalculusError::NegativeTolerance when tolerance is invalid.

pub fn validate(self) -> Result<LimitApproximator, CalculusError>

Validates that the stored step and tolerance are acceptable.

Errors

Returns the same error variants as Self::try_new.

pub const fn step(&self) -> f64

Returns the symmetric sample step.

pub const fn tolerance(&self) -> f64

Returns the acceptance tolerance between the left and right samples.

pub fn at<F>(self, function: F, at: f64) -> Result<f64, CalculusError>

where F: FnMut(f64) -> f64,

Approximates a two-sided limit at at using one symmetric sample scale.

Errors

Returns CalculusError when the stored step or tolerance is invalid, at is not finite, sampled evaluations are not finite, or the left and right samples disagree by more than tolerance.

Trait Implementations

impl Clone for LimitApproximator

fn clone(&self) -> LimitApproximator

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LimitApproximator

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl PartialEq for LimitApproximator

fn eq(&self, other: &LimitApproximator) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for LimitApproximator

impl StructuralPartialEq for LimitApproximator