Enum Change 

#[non_exhaustive]
pub enum Change {
    Percent(f64),
    Points(f64),
    FromZero,
    NaN,
}

How a value has moved relative to its baseline record, oriented so a positive number means worse. Returned by Threshold::change.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Percent(f64)

A Scale::Ratio metric’s change as a percentage of the record.

Points(f64)

A Scale::Interval metric’s change in the metric’s own points; a percentage of an arbitrary zero means nothing.

FromZero

A Scale::Ratio metric whose record was zero: any growth is an unbounded percentage.

NaN

The current value is NaN.

Trait Implementations

impl Clone for Change

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Change

impl Debug for Change

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

Formats the value using the given formatter.

impl PartialEq for Change

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Change