Struct UnknownVariant 

pub struct UnknownVariant {
    pub expected: &'static str,
    pub found: String,
}

A wire or storage string that names no variant of a closed enum.

The Closed Enum Contract’s third rule forbids mapping such a value onto a known variant, so every decoder in this crate refuses by name and hands the offending spelling back for the caller to report. An Unknown(String) variant would be the other permitted answer; a refusal is chosen because these values reach authorization and outcome reporting, where carrying an uninterpretable value forward is worse than stopping.

Fields

expected: &'static str

The enum the value was being decoded into.

found: String

The value as it arrived, so the report names it.

Trait Implementations

impl Clone for UnknownVariant

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UnknownVariant

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

Formats the value using the given formatter.

impl Display for UnknownVariant

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

Formats the value using the given formatter.

impl Eq for UnknownVariant

impl Error for UnknownVariant

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 UnknownVariant

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for UnknownVariant