Enum StartError

#[non_exhaustive]
pub enum StartError {
    Quit {
        byte: u8,
    },
    UnsupportedAnchored {
        mode: Anchored,
    },
}

Available on crate feature dfa-search and (crate features dfa-search or dfa-onepass) only.

An error that can occur when computing the start state for a search.

Computing a start state can fail for a few reasons, either based on incorrect configuration or even based on whether the look-behind byte triggers a quit state. Typically one does not need to handle this error if you’re using Automaton::start_state_forward (or its reverse counterpart), as that routine automatically converts StartError to a MatchError for you.

This error may be returned by the Automaton::start_state routine.

This error implements the std::error::Error trait when the std feature is enabled.

This error is marked as non-exhaustive. New variants may be added in a semver compatible release.

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.

Quit

An error that occurs when a starting configuration’s look-behind byte is in this DFA’s quit set.

Fields

byte: u8

The quit byte that was found.

UnsupportedAnchored

An error that occurs when the caller requests an anchored mode that isn’t supported by the DFA.

Fields

mode: Anchored

The anchored mode given that is unsupported.

Trait Implementations

impl Clone for StartError

fn clone(&self) -> StartError

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for StartError

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

Formats the value using the given formatter.

impl Display for StartError

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

Formats the value using the given formatter.

impl Error for StartError

Available on crate feature std only.

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.