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use crate::{CpuStorage, Error, Result};
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
pub enum DType {
F32,
F64,
}
impl DType {
pub fn size_in_bytes(&self) -> usize {
match self {
Self::F32 => 4,
Self::F64 => 8,
}
}
}
pub trait WithDType: Sized + Copy {
const DTYPE: DType;
fn to_cpu_storage_owned(data: Vec<Self>) -> CpuStorage;
fn to_cpu_storage(data: &[Self]) -> CpuStorage {
Self::to_cpu_storage_owned(data.to_vec())
}
fn cpu_storage_as_slice(s: &CpuStorage) -> Result<&[Self]>;
}
macro_rules! with_dtype {
($ty:ty, $dtype:ident) => {
impl WithDType for $ty {
const DTYPE: DType = DType::$dtype;
fn to_cpu_storage_owned(data: Vec<Self>) -> CpuStorage {
CpuStorage::$dtype(data)
}
fn cpu_storage_as_slice(s: &CpuStorage) -> Result<&[Self]> {
match s {
CpuStorage::$dtype(data) => Ok(data),
_ => Err(Error::UnexpectedDType {
expected: DType::$dtype,
got: s.dtype(),
}),
}
}
}
};
}
with_dtype!(f32, F32);
with_dtype!(f64, F64);
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