pub struct ClassUnicode { /* private fields */ }
Expand description
A set of characters represented by Unicode scalar values.
Implementations§
Source§impl ClassUnicode
impl ClassUnicode
Sourcepub fn new<I>(ranges: I) -> ClassUnicodewhere
I: IntoIterator<Item = ClassUnicodeRange>,
pub fn new<I>(ranges: I) -> ClassUnicodewhere
I: IntoIterator<Item = ClassUnicodeRange>,
Create a new class from a sequence of ranges.
The given ranges do not need to be in any specific order, and ranges may overlap. Ranges will automatically be sorted into a canonical non-overlapping order.
Sourcepub fn empty() -> ClassUnicode
pub fn empty() -> ClassUnicode
Create a new class with no ranges.
An empty class matches nothing. That is, it is equivalent to
Hir::fail
.
Sourcepub fn push(&mut self, range: ClassUnicodeRange)
pub fn push(&mut self, range: ClassUnicodeRange)
Add a new range to this set.
Sourcepub fn iter(&self) -> ClassUnicodeIter<'_> ⓘ
pub fn iter(&self) -> ClassUnicodeIter<'_> ⓘ
Return an iterator over all ranges in this class.
The iterator yields ranges in ascending order.
Sourcepub fn ranges(&self) -> &[ClassUnicodeRange]
pub fn ranges(&self) -> &[ClassUnicodeRange]
Return the underlying ranges as a slice.
Sourcepub fn case_fold_simple(&mut self)
pub fn case_fold_simple(&mut self)
Expand this character class such that it contains all case folded
characters, according to Unicode’s “simple” mapping. For example, if
this class consists of the range a-z
, then applying case folding will
result in the class containing both the ranges a-z
and A-Z
.
§Panics
This routine panics when the case mapping data necessary for this
routine to complete is unavailable. This occurs when the unicode-case
feature is not enabled.
Callers should prefer using try_case_fold_simple
instead, which will
return an error instead of panicking.
Sourcepub fn try_case_fold_simple(&mut self) -> Result<(), CaseFoldError>
pub fn try_case_fold_simple(&mut self) -> Result<(), CaseFoldError>
Expand this character class such that it contains all case folded
characters, according to Unicode’s “simple” mapping. For example, if
this class consists of the range a-z
, then applying case folding will
result in the class containing both the ranges a-z
and A-Z
.
§Error
This routine returns an error when the case mapping data necessary
for this routine to complete is unavailable. This occurs when the
unicode-case
feature is not enabled.
Sourcepub fn negate(&mut self)
pub fn negate(&mut self)
Negate this character class.
For all c
where c
is a Unicode scalar value, if c
was in this
set, then it will not be in this set after negation.
Sourcepub fn union(&mut self, other: &ClassUnicode)
pub fn union(&mut self, other: &ClassUnicode)
Union this character class with the given character class, in place.
Sourcepub fn intersect(&mut self, other: &ClassUnicode)
pub fn intersect(&mut self, other: &ClassUnicode)
Intersect this character class with the given character class, in place.
Sourcepub fn difference(&mut self, other: &ClassUnicode)
pub fn difference(&mut self, other: &ClassUnicode)
Subtract the given character class from this character class, in place.
Sourcepub fn symmetric_difference(&mut self, other: &ClassUnicode)
pub fn symmetric_difference(&mut self, other: &ClassUnicode)
Compute the symmetric difference of the given character classes, in place.
This computes the symmetric difference of two character classes. This removes all elements in this class that are also in the given class, but all adds all elements from the given class that aren’t in this class. That is, the class will contain all elements in either class, but will not contain any elements that are in both classes.
Sourcepub fn is_ascii(&self) -> bool
pub fn is_ascii(&self) -> bool
Returns true if and only if this character class will either match nothing or only ASCII bytes. Stated differently, this returns false if and only if this class contains a non-ASCII codepoint.
Sourcepub fn minimum_len(&self) -> Option<usize>
pub fn minimum_len(&self) -> Option<usize>
Returns the length, in bytes, of the smallest string matched by this character class.
Returns None
when the class is empty.
Sourcepub fn maximum_len(&self) -> Option<usize>
pub fn maximum_len(&self) -> Option<usize>
Returns the length, in bytes, of the longest string matched by this character class.
Returns None
when the class is empty.
Sourcepub fn literal(&self) -> Option<Vec<u8>>
pub fn literal(&self) -> Option<Vec<u8>>
If this class consists of exactly one codepoint, then return it as a literal byte string.
If this class is empty or contains more than one codepoint, then None
is returned.
Sourcepub fn to_byte_class(&self) -> Option<ClassBytes>
pub fn to_byte_class(&self) -> Option<ClassBytes>
If this class consists of only ASCII ranges, then return its corresponding and equivalent byte class.
Trait Implementations§
Source§impl Clone for ClassUnicode
impl Clone for ClassUnicode
Source§fn clone(&self) -> ClassUnicode
fn clone(&self) -> ClassUnicode
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreSource§impl Debug for ClassUnicode
impl Debug for ClassUnicode
Source§impl PartialEq for ClassUnicode
impl PartialEq for ClassUnicode
impl Eq for ClassUnicode
impl StructuralPartialEq for ClassUnicode
Auto Trait Implementations§
impl Freeze for ClassUnicode
impl RefUnwindSafe for ClassUnicode
impl Send for ClassUnicode
impl Sync for ClassUnicode
impl Unpin for ClassUnicode
impl UnwindSafe for ClassUnicode
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)