Enum QueryError 

#[non_exhaustive]
pub enum QueryError {
    Miss,
    Io(Error),
    BadData(Error),
}

Raised when accessing data in the cache.

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.

Miss

Raised when there is a cache miss.

Io(Error)

Raised when an I/O error occurs.

This can occur when reading the cache file.

BadData(Error)

Raised when JSON deserialization occurs.

Data is stored in the cache as JSON, so this error is raised when deserializing the data fails.

Since the caller provides the type that is stored in the cache, this will typically occur if the type changes.

Trait Implementations

impl Debug for QueryError

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

Formats the value using the given formatter.

impl Display for QueryError

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

Formats the value using the given formatter.

impl Error for QueryError

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<Error> for QueryError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for QueryError

fn from(source: Error) -> Self

Converts to this type from the input type.