Enum FactLoadResult 

#[non_exhaustive]
pub enum FactLoadResult<V> {
    Found(V),
    Missing,
    Error(FactLoadError),
}

Result of loading one fact.

This is shaped like Result<Option<V>, FactLoadError> — Found, Missing, and Error map onto Ok(Some), Ok(None), and Err. A dedicated enum is used instead so the three outcomes read as domain concepts at policy call sites (FactLoadResult::Missing rather than Ok(None)), so “the fact does not exist” is never visually conflated with “the load failed” — a distinction that matters for fail-closed authorization — and so the type can gain variants later without breaking a Result alias callers rely on.

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.

Found(V)

The fact exists and has the given value.

Missing

The fact source was reached, but no value exists for the key.

Error(FactLoadError)

Loading failed. Policies should map this to a denied decision.

Trait Implementations

impl<V: Clone> Clone for FactLoadResult<V>

fn clone(&self) -> FactLoadResult<V>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<V: Debug> Debug for FactLoadResult<V>

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

Formats the value using the given formatter.