Enum WireStructure 

pub enum WireStructure {
    Off,
    Affine,
    Auto,
}

Whether the encoder may replace a column with a closed-form generator when the data is mathematically structured — the Futamura move on the wire: if the values are described by a formula, ship the formula, not the values. Every form is lossless and gated by an exact-match proof, so it can never change the decoded value; the decoder always reconstructs (each form has its own tag). Off by default (detection is an O(n) scan the speed dials skip), opt-in per send.

Variants

Off

No structural analysis — integer columns encode by the numeric dial.

Affine

Detect an affine progression v[i] = base + i·stride; when every element matches exactly (wrapping i64), send (base, stride, n) — three numbers for the whole column — instead of the data. Falls back to the numeric dial when the data is not affine, so it never grows a message or loses a value.

Auto

The full per-column compression menu: build every applicable encoding (varint baseline · affine · delta · delta-of-delta · frame-of-reference bit-packing · run-length · dictionary) and ship the SMALLEST. The varint baseline is always a candidate, so the result is never larger than Off’s varint — each encoding is a categorical win on its shape (monotone, near-linear timestamps, clustered, runs, low-cardinality) and silently loses the bake-off otherwise. The “smallest” knob.

Trait Implementations

impl Clone for WireStructure

fn clone(&self) -> WireStructure

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WireStructure

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

Formats the value using the given formatter.

impl PartialEq for WireStructure

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for WireStructure

impl Eq for WireStructure

impl StructuralPartialEq for WireStructure