Struct BudgetTracker

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pub struct BudgetTracker {
    pub epsilon_budget: f64,
    pub epsilon_used: f64,
    pub delta_budget: f64,
    pub delta_used: f64,
    pub queries_answered: u64,
}

Expand description

Tracks consumed and remaining privacy budget.

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§epsilon_budget: f64

Total epsilon allocated for all queries.

§epsilon_used: f64

Epsilon consumed so far.

§delta_budget: f64

Total delta allocated for all queries.

§delta_used: f64

Delta consumed so far.

§queries_answered: u64

Number of queries answered successfully.

Implementations§

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impl BudgetTracker

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pub fn new(epsilon_budget: f64, delta_budget: f64) -> Self

Construct a new tracker with given budgets and zero consumption.

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pub fn remaining_epsilon(&self) -> f64

Remaining epsilon = budget − used.

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pub fn remaining_delta(&self) -> f64

Remaining delta = budget − used.

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pub fn is_exhausted(&self) -> bool

Returns true when epsilon_used ≥ epsilon_budget.

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pub fn charge( &mut self, epsilon_cost: f64, delta_cost: f64, ) -> Result<(), DpError>

Charge epsilon and delta to the budget. Returns an error if the budget would be exceeded.

Trait Implementations§

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impl Clone for BudgetTracker

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fn clone(&self) -> BudgetTracker

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

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impl Debug for BudgetTracker

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl UnwindSafe for BudgetTracker

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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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impl<T> Any for T
where T: 'static + ?Sized,

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fn borrow(&self) -> &T

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fn borrow_mut(&mut self) -> &mut T

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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn into(self) -> U

Calls U::from(self).

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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