Struct BackendSelector 

pub struct BackendSelector { /* private fields */ }

Poka-Yoke: Type-safe backend selection

Provides compile-time and runtime guarantees for correct backend selection based on input size and operation type.

Implementations

impl BackendSelector

pub const fn new( gpu_threshold: usize, parallel_threshold: usize, ) -> BackendSelector

Create a new backend selector with custom thresholds

pub const fn gpu_threshold(&self) -> usize

Get the GPU threshold

pub const fn parallel_threshold(&self) -> usize

Get the parallel threshold

pub fn select_for_size( &self, size: usize, gpu_available: bool, ) -> BackendCategory

Select backend based on input size

Decision Logic (TRUENO-SPEC-012)

• N < 1,000: Pure SIMD (no parallelization overhead)
• 1,000 <= N < 100,000: SIMD + Parallel (Rayon)
• N >= 100,000: GPU (if available), else SIMD + Parallel

pub fn is_at_gpu_boundary(&self, size: usize) -> bool

Check if size is at GPU threshold boundary (for testing)

pub fn is_at_parallel_boundary(&self, size: usize) -> bool

Check if size is at parallel threshold boundary (for testing)

Trait Implementations

impl Clone for BackendSelector

fn clone(&self) -> BackendSelector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BackendSelector

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

Formats the value using the given formatter.

impl Default for BackendSelector

fn default() -> BackendSelector

Returns the “default value” for a type.