Struct regex_syntax::hir::ClassUnicode

source · [−]

pub struct ClassUnicode { /* private fields */ }

Expand description

A set of characters represented by Unicode scalar values.

Implementations

source

impl ClassUnicode

source

pub fn new(ranges: I) -> ClassUnicode where
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.

source

pub fn empty() -> ClassUnicode

Create a new class with no ranges.

source

pub fn push(&mut self, range: ClassUnicodeRange)

Add a new range to this set.

source

pub fn iter(&self) -> ClassUnicodeIter<'_>ⓘNotable traits for ClassUnicodeIter<'a>`impl<'a> Iterator for ClassUnicodeIter<'a> type Item = &'a ClassUnicodeRange;`

Return an iterator over all ranges in this class.

The iterator yields ranges in ascending order.

source

pub fn ranges(&self) -> &[ClassUnicodeRange ]

Return the underlying ranges as a slice.

source

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.

source

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.

source

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.

source

pub fn union(&mut self, other: &ClassUnicode)

Union this character class with the given character class, in place.

source

pub fn intersect(&mut self, other: &ClassUnicode)

Intersect this character class with the given character class, in place.

source

pub fn difference(&mut self, other: &ClassUnicode)

Subtract the given character class from this character class, in place.

source

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.

source

pub fn is_all_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.