Enum MonotoneRootError 

pub enum MonotoneRootError {
    EvalFailed {
        label: String,
        a: f64,
        source: String,
    },
    NonFiniteEval {
        label: String,
        a: f64,
        f: f64,
        fp: f64,
        fpp: f64,
    },
    DegenerateDerivative {
        label: String,
        a: f64,
        fp: f64,
    },
    BracketingExhausted {
        label: String,
        iters: usize,
        a_lo: f64,
        a_hi: f64,
    },
    RefinementDidNotConverge {
        label: String,
        iters: usize,
        last_residual: f64,
    },
}

Typed errors emitted by the monotone-root solver. Display preserves the exact pre-refactor error-string shapes so log expectations are unchanged.

Variants

EvalFailed

eval(a) returned an inner error message at the bracketing / refine step.

Fields

label: String

a: f64

source: String

NonFiniteEval

eval(a) returned a non-finite tuple component (f, f’, or f’’).

Fields

label: String

a: f64

f: f64

fp: f64

fpp: f64

DegenerateDerivative

Derivative at the initial / current point is zero or non-finite — monotonicity hypothesis violated.

Fields

label: String

a: f64

fp: f64

BracketingExhausted

Bracketing failed to find a sign change within max_bracket_iters.

Fields

label: String

iters: usize

a_lo: f64

a_hi: f64

RefinementDidNotConverge

Newton refinement did not meet convergence_tol within max_refine_iters.

Fields

label: String

iters: usize

last_residual: f64

Implementations

impl MonotoneRootError

Internal: which exact textual shape a given error site emitted. These are folded into the enum variants above via Display so callers see byte-identical strings to the pre-refactor format!() output.

pub fn exact_root_degenerate(label: &str, a: f64) -> Self

pub fn converged_root_degenerate(label: &str, a: f64) -> Self

pub fn analytic_bracket_invalid(label: &str, lo: f64, hi: f64) -> Self

pub fn analytic_bracket_no_straddle(label: &str, f_lo: f64, f_hi: f64) -> Self

pub fn search_exhausted(label: &str, step_sign: f64, a_init: f64) -> Self

Trait Implementations

impl Clone for MonotoneRootError

fn clone(&self) -> MonotoneRootError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MonotoneRootError

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

Formats the value using the given formatter.

impl Display for MonotoneRootError

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

Formats the value using the given formatter.

impl Error for MonotoneRootError

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 From<MonotoneRootError> for EstimationError

fn from(source: MonotoneRootError) -> Self

Converts to this type from the input type.