Enum RootError 

pub enum RootError {
    NonFinite,
    Zero,
    NoSignChange,
}

Why a root query has no answer.

Variants

NonFinite

A coefficient, a bracket end, a tolerance or a function value is not finite (a negative tolerance counts), or the coefficients are so far apart that the root bound overflows f64.

Zero

Every coefficient is zero: every x is a root.

NoSignChange

The function has the same sign at both ends of the bracket, so the bracket is no bracket.

Trait Implementations

impl Clone for RootError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RootError

impl Debug for RootError

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

Formats the value using the given formatter.

impl Display for RootError

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

Formats the value using the given formatter.

impl Eq for RootError

impl Error for RootError

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 RootError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for RootError