Enum MatchingError 

#[non_exhaustive]
pub enum MatchingError {
    MissingField(String),
}

Errors that may be returned by thing-matcher operations.

The matching engine itself is infallible — scoring two things always produces a crate::MatchResult. The only fallible operation in the public surface today is crate::Thing::validate, which returns MatchingError::MissingField when the primary name is absent. Configuration builders (crate::MatchConfig::default, strict, lenient) are infallible.

The enum is #[non_exhaustive] so future fallible code paths can add variants without breaking SemVer for downstream pattern-matches.

use thing_matcher::MatchingError;

let e = MatchingError::MissingField("name".into());
// `Display` is provided by `thiserror`.
assert!(e.to_string().contains("Missing required field"));

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

MissingField(String)

A required field was absent. Returned by crate::Thing::validate.

Trait Implementations

impl Debug for MatchingError

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

Formats the value using the given formatter.

impl Display for MatchingError

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

Formats the value using the given formatter.

impl Error for MatchingError

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.