Trait approx::ApproxEq [−] [src]

pub trait ApproxEq: Sized {
    type Epsilon: Copy;
    fn default_epsilon() -> Self::Epsilon;
    fn default_max_relative() -> Self::Epsilon;
    fn default_max_ulps() -> u32;
    fn relative_eq(&self, other: &Self, epsilon: Self::Epsilon, max_relative: Self::Epsilon) -> bool;
    fn ulps_eq(&self, other: &Self, epsilon: Self::Epsilon, max_ulps: u32) -> bool;

    fn relative_ne(&self, other: &Self, epsilon: Self::Epsilon, max_relative: Self::Epsilon) -> bool { ... }
    fn ulps_ne(&self, other: &Self, epsilon: Self::Epsilon, max_ulps: u32) -> bool { ... }
}

Equality comparisons based on floating point tolerances.

Associated Types

type Epsilon: Copy

Used for specifying relative comparisons. This is usually a floating point value.

Required Methods

fn default_epsilon() -> Self::Epsilon

The default tolerance to use when testing values that are close together.

This is used when no epsilon value is supplied to the relative_eq or ulps_eq macros.

fn default_max_relative() -> Self::Epsilon

The default relative tolerance for testing values that are far-apart.

This is used when no max_relative value is supplied to the relative_eq macro.

fn default_max_ulps() -> u32

The default ULPs to tolerate when testing values that are far-apart.

This is used when no max_relative value is supplied to the relative_eq macro.

fn relative_eq(&self, other: &Self, epsilon: Self::Epsilon, max_relative: Self::Epsilon) -> bool

A test for equality that uses a relative comparison if the values are far apart.

fn ulps_eq(&self, other: &Self, epsilon: Self::Epsilon, max_ulps: u32) -> bool

A test for equality that uses units in the last place (ULP) if the values are far apart.

Provided Methods

fn relative_ne(&self, other: &Self, epsilon: Self::Epsilon, max_relative: Self::Epsilon) -> bool

The inverse of ApproxEq::relative_eq.

fn ulps_ne(&self, other: &Self, epsilon: Self::Epsilon, max_ulps: u32) -> bool

The inverse of ApproxEq::ulps_eq.

Implementors