Trait Field

pub trait Field:
    Sized
    + Eq
    + Copy
    + Clone
    + Default
    + Send
    + Sync
    + Debug
    + Display
    + Hash
    + 'static
    + Neg<Output = Self>
    + Add<Output = Self>
    + Sub<Output = Self>
    + Mul<Output = Self>
    + Sum
    + Product
    + for<'a> Add<&'a Self, Output = Self>
    + for<'a> Sub<&'a Self, Output = Self>
    + for<'a> Mul<&'a Self, Output = Self>
    + for<'a> Sum<&'a Self>
    + for<'a> Product<&'a Self>
    + AddAssign
    + SubAssign
    + MulAssign
    + for<'a> AddAssign<&'a Self>
    + for<'a> SubAssign<&'a Self>
    + for<'a> MulAssign<&'a Self>
    + Square
    + InvertOrZero
    + WithUnderlier<Underlier: PackScalar<Self>> {
    const ZERO: Self;
    const ONE: Self;

    // Required methods
    fn random(rng: impl RngCore) -> Self;
    fn double(&self) -> Self;

    // Provided methods
    fn is_zero(&self) -> bool { ... }
    fn invert(&self) -> Option<Self> { ... }
    fn pow<S: AsRef<[u64]>>(&self, exp: S) -> Self { ... }
    fn pow_vartime<S: AsRef<[u64]>>(&self, exp: S) -> Self { ... }
}

This trait is based on ff::Field with some unused functionality removed.

Required Associated Constants

const ZERO: Self

The zero element of the field, the additive identity.

const ONE: Self

The one element of the field, the multiplicative identity.

Required Methods

fn random(rng: impl RngCore) -> Self

Returns an element chosen uniformly at random using a user-provided RNG.

fn double(&self) -> Self

Doubles this element.

Provided Methods

fn is_zero(&self) -> bool

Returns true iff this element is zero.

fn invert(&self) -> Option<Self>

Computes the multiplicative inverse of this element, failing if the element is zero.

fn pow<S: AsRef<[u64]>>(&self, exp: S) -> Self

Exponentiates self by exp, where exp is a little-endian order integer exponent.

Guarantees

This operation is constant time with respect to self, for all exponents with the same number of digits (exp.as_ref().len()). It is variable time with respect to the number of digits in the exponent.

fn pow_vartime<S: AsRef<[u64]>>(&self, exp: S) -> Self

Exponentiates self by exp, where exp is a little-endian order integer exponent.

Guarantees

This operation is variable time with respect to self, for all exponent. If the exponent is fixed, this operation is effectively constant time. However, for stronger constant-time guarantees, Field::pow should be used.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl Field for AESTowerField8b

const ZERO: Self = _

const ONE: Self = _

impl Field for AESTowerField16b

const ZERO: Self = _

const ONE: Self = _

impl Field for AESTowerField32b

const ZERO: Self = _

const ONE: Self = _

impl Field for AESTowerField64b

const ZERO: Self = _

const ONE: Self = _

impl Field for AESTowerField128b

const ZERO: Self = _

const ONE: Self = _

impl Field for BinaryField1b

const ZERO: Self = _

const ONE: Self = _

impl Field for BinaryField2b

const ZERO: Self = _

const ONE: Self = _

impl Field for BinaryField4b

const ZERO: Self = _

const ONE: Self = _

impl Field for BinaryField8b

const ZERO: Self = _

const ONE: Self = _

impl Field for BinaryField16b

const ZERO: Self = _

const ONE: Self = _

impl Field for BinaryField32b

const ZERO: Self = _

const ONE: Self = _

impl Field for BinaryField64b

const ZERO: Self = _

const ONE: Self = _

impl Field for BinaryField128b

const ZERO: Self = _

const ONE: Self = _

impl Field for BinaryField128bPolyval

const ZERO: Self = _

const ONE: Self = _