Enum ParameterError 

pub enum ParameterError {
    DefaultNotInDomain,
    DefaultViolatesConstraint,
    ConstraintKindMismatch {
        parameter_kind: ValueKind,
    },
    DerivedSelectionUnsupported,
    Attribute(AttributeError),
}

Errors from parameter construction and builder-style setters.

Variants

DefaultNotInDomain

with_default was given a value outside the domain.

DefaultViolatesConstraint

with_default was given a value that fails a registered constraint.

ConstraintKindMismatch

A constraint’s kind differs from the parameter’s.

Fields

parameter_kind: ValueKind

The parameter’s kind.

DerivedSelectionUnsupported

A DerivedParameter was constructed with a Selection kind (expressions only produce integer/double/boolean/string).

Attribute(AttributeError)

with_label or with_tag introduced a key already present in another tier on this parameter.

Trait Implementations

impl Debug for ParameterError

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

Formats the value using the given formatter.

impl Display for ParameterError

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

Formats the value using the given formatter.

impl Error for ParameterError

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<AttributeError> for ParameterError

fn from(source: AttributeError) -> Self

Converts to this type from the input type.

impl From<ParameterError> for Error

fn from(source: ParameterError) -> Self

Converts to this type from the input type.