Enum `Utf8Sequence`

pub enum Utf8Sequence

Utf8Sequence represents a sequence of byte ranges.

To match a Utf8Sequence, a candidate byte sequence must match each successive range.

For example, if there are two ranges, [C2-DF][80-BF], then the byte sequence \xDD\x61 would not match because 0x61 < 0x80.

Variants

One(Utf8Range): One byte range.
Two([Utf8Range; 2]): Two successive byte ranges.
Three([Utf8Range; 3]): Three successive byte ranges.
Four([Utf8Range; 4]): Four successive byte ranges.

Implementations

`impl Utf8Sequence`

fn as_slice(&self) -> &[Utf8Range]

Returns the underlying sequence of byte ranges as a slice.

fn len(&self) -> usize

Returns the number of byte ranges in this sequence.

The length is guaranteed to be in the closed interval [1, 4].

fn reverse(&mut self)

Reverses the ranges in this sequence.

For example, if this corresponds to the following sequence:

[D0-D3][80-BF]

Then after reversal, it will be

[80-BF][D0-D3]

This is useful when one is constructing a UTF-8 automaton to match character classes in reverse.

fn matches(&self, bytes: &[u8]) -> bool

Returns true if and only if a prefix of bytes matches this sequence of byte ranges.

Trait Implementations

`impl Clone for Utf8Sequence`

fn clone(&self) -> Self

`impl Copy for Utf8Sequence`

`impl Debug for Utf8Sequence`

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

`impl Eq for Utf8Sequence`

`impl Ord for Utf8Sequence`

fn cmp(&self, other: &Self) -> Ordering

`impl PartialEq for Utf8Sequence`

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

`impl PartialOrd for Utf8Sequence`

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

`impl StructuralPartialEq for Utf8Sequence`

Auto Trait Implementations

`impl Freeze for Utf8Sequence`

`impl RefUnwindSafe for Utf8Sequence`

`impl Send for Utf8Sequence`

`impl Sync for Utf8Sequence`

`impl Unpin for Utf8Sequence`

`impl UnsafeUnpin for Utf8Sequence`

`impl UnwindSafe for Utf8Sequence`

Blanket Implementations

`impl<T> Any for Utf8Sequence where T: 'static + ?Sized,`

fn type_id(&self) -> TypeId

`impl<T> Borrow<T> for Utf8Sequence where T: ?Sized,`

fn borrow(&self) -> &T

`impl<T> BorrowMut<T> for Utf8Sequence where T: ?Sized,`

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

`impl<T> CloneToUninit for Utf8Sequence where T: Clone,`

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

`impl<T> From<T> for Utf8Sequence`

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

`impl<T> ToOwned for Utf8Sequence where T: Clone,`

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

`impl<T, U> Into for Utf8Sequence 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 for Utf8Sequence where U: Into<T>,`

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

`impl<T, U> TryInto for Utf8Sequence where U: TryFrom<T>,`

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