Enum regex_automata::meta::error::RetryError

pub(crate) enum RetryError {
    Quadratic(RetryQuadraticError),
    Fail(RetryFailError),
}

An error that occurs when a search should be retried.

This retry error distinguishes between two different failure modes.

The first is one where potential quadratic behavior has been detected. In this case, whatever optimization that led to this behavior should be stopped, and the next best strategy should be used.

The second indicates that the underlying regex engine has failed for some reason. This usually occurs because either a lazy DFA’s cache has become ineffective or because a non-ASCII byte has been seen and a Unicode word boundary was used in one of the patterns. In this failure case, a different regex engine that won’t fail in these ways (PikeVM, backtracker or the one-pass DFA) should be used.

This is an internal error only and should never bleed into the public API.

Variants

Quadratic(RetryQuadraticError)

Fail(RetryFailError)

Trait Implementations

impl Debug for RetryError

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

Formats the value using the given formatter.

impl Display for RetryError

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

Formats the value using the given formatter.

impl Error for RetryError

fn source(&self) -> Option<&(dyn Error + 'static)>

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<MatchError> for RetryError

fn from(merr: MatchError) -> RetryError

Converts to this type from the input type.

impl From<RetryFailError> for RetryError

fn from(err: RetryFailError) -> RetryError

Converts to this type from the input type.

impl From<RetryQuadraticError> for RetryError

fn from(err: RetryQuadraticError) -> RetryError

Converts to this type from the input type.