hnsw-stable 0.10.1

Pure-Rust port of hnswlib (HNSW approximate nearest neighbors)
Documentation 
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use crate::kernels::Kernel;
use bytemuck::Pod;
use serde::Deserialize;
use serde::Serialize;

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
#[repr(u8)]
pub enum Dtype
{
  F32 = 0,
  F16 = 1,
  BF16 = 2,
  QI8 = 3,
}

pub trait Scalar: Kernel + Pod
{
  const DTYPE: Dtype;
  fn to_f32(self) -> f32;
  fn from_f32(v: f32) -> Self;
}

impl Scalar for f32
{
  const DTYPE: Dtype = Dtype::F32;

  #[inline]
  fn to_f32(self) -> f32
  {
    self
  }

  #[inline]
  fn from_f32(v: f32) -> Self
  {
    v
  }
}

impl Scalar for half::f16
{
  const DTYPE: Dtype = Dtype::F16;

  #[inline]
  fn to_f32(self) -> f32
  {
    self.to_f32()
  }

  #[inline]
  fn from_f32(v: f32) -> Self
  {
    Self::from_f32(v)
  }
}

impl Scalar for half::bf16
{
  const DTYPE: Dtype = Dtype::BF16;

  #[inline]
  fn to_f32(self) -> f32
  {
    self.to_f32()
  }

  #[inline]
  fn from_f32(v: f32) -> Self
  {
    Self::from_f32(v)
  }
}