Enum regex_automata::MatchErrorKind

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#[non_exhaustive]
pub enum MatchErrorKind { Quit { byte: u8, offset: usize, }, GaveUp { offset: usize, }, HaystackTooLong { len: usize, }, UnsupportedAnchored { mode: Anchored, }, }
Expand description

The underlying kind of a MatchError.

This is a non-exhaustive enum. That means new variants may be added in a semver-compatible release.

Variants (Non-exhaustive)§

This enum is marked as 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.
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Quit

The search saw a “quit” byte at which it was instructed to stop searching.

Fields

§byte: u8

The “quit” byte that was observed that caused the search to stop.

§offset: usize

The offset at which the quit byte was observed.

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GaveUp

The search, based on heuristics, determined that it would be better to stop, typically to provide the caller an opportunity to use an alternative regex engine.

Currently, the only way for this to occur is via the lazy DFA and only when it is configured to do so (it will not return this error by default).

Fields

§offset: usize

The offset at which the search stopped. This corresponds to the position immediately following the last byte scanned.

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HaystackTooLong

This error occurs if the haystack given to the regex engine was too long to be searched. This occurs, for example, with regex engines like the bounded backtracker that have a configurable fixed amount of capacity that is tied to the length of the haystack. Anything beyond that configured limit will result in an error at search time.

Fields

§len: usize

The length of the haystack that exceeded the limit.

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UnsupportedAnchored

An error indicating that a particular type of anchored search was requested, but that the regex engine does not support it.

Note that this error should not be returned by a regex engine simply because the pattern ID is invalid (i.e., equal to or exceeds the number of patterns in the regex). In that case, the regex engine should report a non-match.

Fields

§mode: Anchored

The anchored mode given that is unsupported.

Trait Implementations§

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impl Clone for MatchErrorKind

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fn clone(&self) -> MatchErrorKind

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for MatchErrorKind

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

Formats the value using the given formatter. Read more
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impl PartialEq for MatchErrorKind

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fn eq(&self, other: &MatchErrorKind) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for MatchErrorKind

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impl StructuralPartialEq for MatchErrorKind

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.