Enum Impact 

#[non_exhaustive]
pub enum Impact {
    Unmeasured,
    Inert,
    Measured(MeasuredImpact),
}

How much a decision changed the answer, where that is known.

An impact is a measurement or it is nothing. There is deliberately no “low”, “moderate” or “high”: such a label would be a property an author assigned, and presenting it beside measured values would lend it evidence it does not have. The way to learn an impact is to vary the decision and look, which is what an audit does and what MeasuredImpact records.

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.

Unmeasured

Not measured. The honest default: nothing has been varied.

Inert

The decision cannot change this result, for a structural reason (the input has no alternate locations, say), not an estimated one.

Measured(MeasuredImpact)

Measured by varying the decision across defensible alternatives.

Trait Implementations

impl Clone for Impact

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 Impact

impl Debug for Impact

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

Formats the value using the given formatter.

impl Default for Impact

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Impact

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Impact