Enum ConfigError 

pub enum ConfigError {
    OutOfRange {
        param: &'static str,
        constraint: &'static str,
        value: String,
    },
    Invalid {
        param: &'static str,
        reason: String,
    },
}

Available on crate feature alloc only.

Structured error for configuration validation failures.

Instead of opaque strings, each variant carries the parameter name and constraint so callers can programmatically inspect what went wrong.

Requires the alloc feature for String fields.

Variants

OutOfRange

A parameter value is outside its valid range.

Examples

n_steps must be > 0 (got 0)
learning_rate must be in (0, 1] (got 1.5)

Fields

param: &'static str

The parameter name (e.g. "n_steps", "drift_detector.Adwin.delta").

constraint: &'static str

The constraint that was violated (e.g. "must be > 0").

value: String

The actual value that was provided.

Invalid

A parameter is invalid for a structural reason, typically involving a relationship between two parameters.

Examples

split_reeval_interval must be >= grace_period (200), got 50
drift_detector.Ddm.drift_level must be > warning_level (3.0), got 2.0

Fields

param: &'static str

The parameter name.

reason: String

Why the value is invalid.

Implementations

impl ConfigError

pub fn out_of_range( param: &'static str, constraint: &'static str, value: impl Display, ) -> Self

Convenience for the common “value out of range” case.

pub fn invalid(param: &'static str, reason: impl Into<String>) -> Self

Convenience for the “invalid relationship” case.

Trait Implementations

impl Clone for ConfigError

fn clone(&self) -> ConfigError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConfigError

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

Formats the value using the given formatter.

impl Display for ConfigError

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

Formats the value using the given formatter.

impl Error for ConfigError

Available on crate feature std only.

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<ConfigError> for IrithyllError

fn from(e: ConfigError) -> Self

Converts to this type from the input type.