Enum EngineError 

pub enum EngineError {
    InvalidExpression(String),
    InvalidJson(String),
    EvaluationFailed(String),
    UnknownFunction(String),
    QueryNotFound(String),
    RegistrationFailed(String),
    Internal(String),
}

Errors that can occur during engine operations.

Each variant represents a specific failure mode, making it easy to handle different error types appropriately.

Variants

InvalidExpression(String)

JMESPath expression has invalid syntax.

Returned when JpxEngine::evaluate or JpxEngine::validate encounters a malformed expression.

InvalidJson(String)

JSON input could not be parsed.

Returned when JpxEngine::evaluate_str or similar methods receive invalid JSON.

EvaluationFailed(String)

Expression evaluation failed at runtime.

This can happen when calling undefined functions (in strict mode), type mismatches, or other runtime errors.

UnknownFunction(String)

Requested function does not exist.

Returned by introspection methods when a function name is not found.

QueryNotFound(String)

Requested stored query does not exist.

Returned by JpxEngine::run_query when the named query hasn’t been defined.

RegistrationFailed(String)

Discovery registration failed.

Returned when registering a discovery spec fails validation or conflicts with an existing registration.

Internal(String)

Internal error (lock poisoning, serialization failure, etc.).

These errors indicate bugs or unexpected conditions and should generally be reported.

Trait Implementations

impl Debug for EngineError

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

Formats the value using the given formatter.

impl Display for EngineError

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

Formats the value using the given formatter.

impl Error for EngineError

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.