Struct regex_syntax::hir::ClassBytes

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pub struct ClassBytes { /* private fields */ }

Expand description

A set of characters represented by arbitrary bytes (where one byte corresponds to one character).

Implementations§

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impl ClassBytes

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pub fn new(ranges: I) -> ClassByteswhere
I: IntoIterator<Item = ClassBytesRange>,

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.

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pub fn empty() -> ClassBytes

Create a new class with no ranges.

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

Add a new range to this set.

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pub fn iter(&self) -> ClassBytesIter<'_> ⓘ

Return an iterator over all ranges in this class.

The iterator yields ranges in ascending order.

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

Return the underlying ranges as a slice.

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pub fn case_fold_simple(&mut self)

Expand this character class such that it contains all case folded characters. 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.

Note that this only applies ASCII case folding, which is limited to the characters a-z and A-Z.

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pub fn negate(&mut self)

Negate this byte class.

For all b where b is a any byte, if b was in this set, then it will not be in this set after negation.

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

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

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

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

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

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

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pub fn symmetric_difference(&mut self, other: &ClassBytes)

Compute the symmetric difference of the given byte classes, in place.

This computes the symmetric difference of two byte 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.

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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 byte.