Struct BnbQuantState 

pub struct BnbQuantState {
    pub n: usize,
    pub k: usize,
    pub block_size: usize,
    pub nested: Option<BnbNestedState>,
}

The geometry + format discriminators extracted from a bitsandbytes quant_state JSON blob. Parsed via parse_bnb_quant_state; consumed by load_nf4_layer to reconstruct the [N, K/block_size] absmax layout from bnb’s flat [N * K / block_size] storage.

Only the fields needed to drive Nf4Weight construction are extracted; the parser ignores unknown fields (forward-compat with future bnb metadata additions).

Fields

n: usize

Number of output features (rows of the weight matrix).

k: usize

Number of input features (the K in (M, K) @ (K, N) → (M, N)).

block_size: usize

First-level (un-nested) quantization block size — typically 64.

nested: Option<BnbNestedState>

Second-level (double-quantization) parameters when the absmax is itself quantized; None for a plain single-level checkpoint.

Trait Implementations

impl Clone for BnbQuantState

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BnbQuantState

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

Formats the value using the given formatter.

impl PartialEq for BnbQuantState

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for BnbQuantState