solana_zk_sdk/
pod.rs

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use bytemuck_derive::{Pod, Zeroable};

#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Pod, Zeroable)]
#[repr(transparent)]
pub struct PodU16([u8; 2]);
impl From<u16> for PodU16 {
    fn from(n: u16) -> Self {
        Self(n.to_le_bytes())
    }
}
impl From<PodU16> for u16 {
    fn from(pod: PodU16) -> Self {
        Self::from_le_bytes(pod.0)
    }
}

#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Pod, Zeroable)]
#[repr(transparent)]
pub struct PodU64([u8; 8]);
impl From<u64> for PodU64 {
    fn from(n: u64) -> Self {
        Self(n.to_le_bytes())
    }
}
impl From<PodU64> for u64 {
    fn from(pod: PodU64) -> Self {
        Self::from_le_bytes(pod.0)
    }
}