Enum Backend 

#[non_exhaustive]
pub enum Backend {
    Scalar,
    Sse41,
    Avx2,
    Neon,
}

The alignment backend actually used, or one that could be requested.

#[non_exhaustive] — more tiers may be added without a breaking change.

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.

Scalar

The portable scalar reference kernel. Always available; the correctness oracle.

Sse41

x86-64 SSE4.1 (16 lanes @ i8). Not yet implemented in M0.

Avx2

x86-64 AVX2 (32 lanes @ i8). Not yet implemented in M0.

Neon

aarch64 NEON (16 lanes @ i8). Not yet implemented in M0.

Implementations

impl Backend

pub const fn name(self) -> &'static str

The canonical lowercase name, matching what BackendChoice::parse accepts.

pub fn is_available(self) -> bool

Whether this backend is implemented and usable on the current build/CPU. Gated on both the target architecture and runtime CPU-feature detection.

Availability is not the whole story for a given database: even an available SIMD backend is only used when the database is SIMD-eligible (i8 width, small alphabet). That extra gate lives in DatabaseBuilder::build.

Trait Implementations

impl Clone for Backend

fn clone(&self) -> Backend

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Backend

impl Debug for Backend

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

Formats the value using the given formatter.

impl Display for Backend

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

Formats the value using the given formatter.

impl Eq for Backend

impl Hash for Backend

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Backend

fn eq(&self, other: &Backend) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Backend