Struct SasLinkState 

pub struct SasLinkState {
    pub epsilon: f64,
    pub log_delta: f64,
    pub delta: f64,
}

Runtime state shared by the two-parameter Sas and BetaLogistic links: an epsilon skew/asymmetry term plus a raw log-scale parameter (log_delta) and its derived positive companion (delta). The delta field’s meaning is link-specific — see its doc — so derivative kernels must consume log_delta, never delta.

Fields

epsilon: f64

log_delta: f64

Raw optimization parameter. For Sas this is the pre-bound log-tail; for BetaLogistic it is the unconstrained log geometric-mean beta shape (the log_shape_center the beta-logistic kernels expect).

delta: f64

Derived positive companion of log_delta. Its meaning depends on the link:

• Sas: effective tail parameter delta = exp(B * tanh(log_delta / B)), B = SAS_LOG_DELTA_BOUND.
• BetaLogistic: geometric-mean beta shape exp(log_delta) = sqrt(a*b). The beta-logistic derivative kernels take log_delta (the log center), so passing this exponentiated delta to them would be off by an exp.

Trait Implementations

impl Clone for SasLinkState

fn clone(&self) -> SasLinkState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SasLinkState

impl Debug for SasLinkState

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SasLinkState

fn deserialize<__D>( __deserializer: __D, ) -> Result<SasLinkState, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for SasLinkState

fn eq(&self, other: &SasLinkState) -> 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 Serialize for SasLinkState

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for SasLinkState