Struct PowerBasis 

pub struct PowerBasis<A> { /* private fields */ }

Stores pre-computed powers of a ciphertext for BSGS polynomial evaluation.

values[n] = X^n (monomial basis) or Tₙ(X) (Chebyshev basis). values[1] must be provided at construction time.

Implementations

impl<A> PowerBasis<A>

pub fn new(basis: Basis, x: A) -> Self

Creates a power basis with x treated as X (or T₁(X) for Chebyshev).

pub fn basis(&self) -> Basis

Returns the polynomial basis represented by the stored powers.

pub fn get_stored(&self, n: usize) -> Option<&A>

Returns a reference to the stored power at degree n, if computed.

pub fn contains_power(&self, n: usize) -> bool

Returns whether the power at degree n is stored.

pub fn set_power(&mut self, n: usize, value: A)

Stores value as the power at degree n, replacing any existing entry.

pub fn take_power(&mut self, n: usize) -> Option<A>

Removes and returns a stored power.

Trait Implementations

impl<BE: Backend, A> PowerBasisHelper<BE, A> for PowerBasis<A>

where A: GLWEToBackendRef<BE>,

fn basis(&self) -> Basis

fn has_power(&self, power: usize) -> bool

fn get(&self, power: usize) -> Result<&A>