Enum NodeStorage 

pub enum NodeStorage {
    F32(Vec<f32>),
    Bytes {
        dtype: VectorStorageDtype,
        bytes: Vec<u8>,
    },
}

Per-node vector storage, discriminated by dtype.

F32 keeps Vec<f32> directly for zero-copy &[f32] access via get_vector. Bytes stores a typed byte buffer for F16/BF16 — the dtype tag mirrors HnswParams::dtype and is stored here for convenience so callers that only have a Node reference do not need to thread the index params.

Variants

F32(Vec<f32>)

F32 storage — 4 bytes per dim; direct &[f32] access, no conversion.

Bytes

Reduced-precision storage — 2 bytes per dim; dtype identifies encoding.

Fields

dtype: VectorStorageDtype

bytes: Vec<u8>

Implementations

impl NodeStorage

pub fn as_bytes(&self) -> &[u8]

Returns a byte-level view of the stored vector regardless of dtype.

For F32, the cast is alignment-safe in the f32 → u8 direction (any-alignment requirement for u8 is satisfied). For Bytes, the slice is returned directly.

pub fn as_f32_slice(&self) -> Option<&[f32]>

Returns Some(&[f32]) only for F32 storage.

For non-F32 storage this returns None. Callers that require an f32 view of a reduced-precision node must decode via crate::dtype::cast_to_f32 or use Self::as_bytes and distance_typed.