Enum `StartError`

#[non_exhaustive]
pub enum StartError

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 DFA::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 DFA::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

Cache { err: CacheError }: An error that occurs when cache inefficiency has dropped below the configured heuristic thresholds.
Quit { byte: u8 }: An error that occurs when a starting configuration's look-behind byte is in this DFA's quit set.
UnsupportedAnchored { mode: Anchored }: An error that occurs when the caller requests an anchored mode that isn't supported by the DFA.

Trait Implementations

`impl Clone for StartError`

fn clone(&self) -> Self

`impl Debug for StartError`

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

`impl Display for StartError`

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

`impl Error for StartError`

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

Auto Trait Implementations

`impl Freeze for StartError`

`impl RefUnwindSafe for StartError`

`impl Send for StartError`

`impl Sync for StartError`

`impl Unpin for StartError`

`impl UnsafeUnpin for StartError`

`impl UnwindSafe for StartError`

Blanket Implementations

`impl<T> Any for StartError where T: 'static + ?Sized,`

fn type_id(&self) -> TypeId

`impl<T> Borrow<T> for StartError where T: ?Sized,`

fn borrow(&self) -> &T

`impl<T> BorrowMut<T> for StartError where T: ?Sized,`

fn borrow_mut(&mut self) -> &mut T

`impl<T> CloneToUninit for StartError where T: Clone,`

unsafe fn clone_to_uninit(&self, dest: *mut u8)

`impl<T> From<T> for StartError`

fn from(t: T) -> T: Returns the argument unchanged.

`impl<T> ToOwned for StartError where T: Clone,`

type Owned = T;
fn to_owned(&self) -> T
fn clone_into(&self, target: &mut T)

`impl<T> ToString for StartError where T: Display + ?Sized,`

fn to_string(&self) -> String

`impl<T, U> Into<U> for StartError where U: From<T>,`

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of [From]<T> for U chooses to do.

`impl<T, U> TryFrom<U> for StartError where U: Into<T>,`

type Error = never;
fn try_from(value: U) -> Result<T, never>

`impl<T, U> TryInto<U> for StartError where U: TryFrom<T>,`

type Error = <U as TryFrom<T>>::Error;
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>