Trait CtLookup 

pub trait CtLookup<Idx> {
    type Output: CtAssign;

    // Required method
    fn ct_lookup(&self, index: Idx) -> CtOption<Self::Output>;
}

Constant-time lookup by index, similar to the Index trait, but returning an owned result in constant-time.

Required Associated Types

type Output: CtAssign

Output type returned by the lookup operation.

Required Methods

fn ct_lookup(&self, index: Idx) -> CtOption<Self::Output>

Attempt to retrieve the item at the given index, either returning it or the CtOption equivalent of None if the index was out-of-bounds.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T, Idx, const N: usize> CtLookup<Idx> for [T; N]

where T: CtAssign + Default, Idx: AddAssign + CtEq + Default + From<u8>,

type Output = T

fn ct_lookup(&self, index: Idx) -> CtOption<T>

impl<T, Idx> CtLookup<Idx> for [T]

where T: CtAssign + Default, Idx: AddAssign + CtEq + Default + From<u8>,

type Output = T

fn ct_lookup(&self, index: Idx) -> CtOption<T>

Implementors