Struct SignTuple 

pub struct SignTuple {
    pub norm: f64,
    pub drift: f64,
    pub slew: f64,
}

A single residual sign tuple.

All DSFB grammar states, motif classifications, and policy decisions derive from this object alone. The field names deliberately mirror dsfb-rf (norm, drift, slew) so cross-crate tooling can consume sign tuples uniformly.

Fields

norm: f64

‖r(k)‖ — instantaneous residual norm. What threshold detectors see.

drift: f64

ṙ(k) — mean first-difference over the drift window.

slew: f64

r̈(k) — slew (drift curvature).

Implementations

impl SignTuple

pub const fn new(norm: f64, drift: f64, slew: f64) -> Self

Construct a sign tuple from explicit components.

pub const fn zero() -> Self

The zero sign tuple — residual at rest, no drift, no curvature.

pub fn is_outward_drift(&self) -> bool

Returns true if drift is positive (outward motion relative to nominal).

pub fn is_abrupt_slew(&self, delta_s: f64) -> bool

Returns true if the slew magnitude exceeds the abrupt-slew threshold delta_s.

Trait Implementations

impl Clone for SignTuple

fn clone(&self) -> SignTuple

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SignTuple

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

Formats the value using the given formatter.

impl Default for SignTuple

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for SignTuple

fn eq(&self, other: &SignTuple) -> 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 SignTuple

impl StructuralPartialEq for SignTuple