Enum Error 

pub enum Error {
    EmptyInput,
    InvalidInput(String),
    DegenerateInput(String),
    InsufficientData,
    NotConverged,
}

A recoverable failure raised by the framework’s hand-written numerics.

Numerics never panic on bad input — they return one of these variants so the caller can decide how to recover. The message-carrying variants embed a short human-readable reason; the unit variants are self-describing.

Variants

EmptyInput

A required sample or collection was empty.

InvalidInput(String)

A parameter or value violated a precondition; carries the reason.

DegenerateInput(String)

The input is technically valid but degenerate (e.g. zero variance); carries the reason.

InsufficientData

There were too few observations to compute the requested quantity.

NotConverged

An iterative procedure exhausted its budget without converging.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Eq for Error

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for Error

fn eq(&self, other: &Error) -> 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 StructuralPartialEq for Error