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Implementing epsilon function to retrieve EPSILON constant #231

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merged 2 commits into from
Sep 22, 2016
Merged

Implementing epsilon function to retrieve EPSILON constant #231

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a64cf66
Implementing epsilon function to retrieve EPSILON constant
AtheMathmo Sep 18, 2016
381942e
Adding default implementation
AtheMathmo Sep 22, 2016
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17 changes: 17 additions & 0 deletions traits/src/float.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -89,6 +89,18 @@ pub trait Float
/// ```
fn min_positive_value() -> Self;

/// Returns epsilon, a small positive value.
///
/// ```
/// use num_traits::Float;
/// use std::f64;
///
/// let x: f64 = Float::epsilon();
///
/// assert_eq!(x, f64::EPSILON);
/// ```
fn epsilon() -> Self;

/// Returns the largest finite value that this type can represent.
///
/// ```
Expand Down Expand Up @@ -936,6 +948,11 @@ macro_rules! float_impl {
::std::$T::MIN_POSITIVE
}

#[inline]
fn epsilon() -> Self {
::std::$T::EPSILON
}

#[inline]
fn max_value() -> Self {
::std::$T::MAX
Expand Down