Struct regex::SetMatches

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pub struct SetMatches(/* private fields */);
Expand description

A set of matches returned by a regex set.

Values of this type are constructed by RegexSet::matches.

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impl SetMatches

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pub fn matched_any(&self) -> bool

Whether this set contains any matches.

Example
use regex::RegexSet;

let set = RegexSet::new(&[
    r"[a-z]+@[a-z]+\.(com|org|net)",
    r"[a-z]+\.(com|org|net)",
]).unwrap();
let matches = set.matches("foo@example.com");
assert!(matches.matched_any());
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pub fn matched(&self, index: usize) -> bool

Whether the regex at the given index matched.

The index for a regex is determined by its insertion order upon the initial construction of a RegexSet, starting at 0.

Panics

If index is greater than or equal to the number of regexes in the original set that produced these matches. Equivalently, when index is greater than or equal to SetMatches::len.

Example
use regex::RegexSet;

let set = RegexSet::new([
    r"[a-z]+@[a-z]+\.(com|org|net)",
    r"[a-z]+\.(com|org|net)",
]).unwrap();
let matches = set.matches("example.com");
assert!(!matches.matched(0));
assert!(matches.matched(1));
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pub fn len(&self) -> usize

The total number of regexes in the set that created these matches.

WARNING: This always returns the same value as RegexSet::len. In particular, it does not return the number of elements yielded by SetMatches::iter. The only way to determine the total number of matched regexes is to iterate over them.

Example

Notice that this method returns the total number of regexes in the original set, and not the total number of regexes that matched.

use regex::RegexSet;

let set = RegexSet::new([
    r"[a-z]+@[a-z]+\.(com|org|net)",
    r"[a-z]+\.(com|org|net)",
]).unwrap();
let matches = set.matches("example.com");
// Total number of patterns that matched.
assert_eq!(1, matches.iter().count());
// Total number of patterns in the set.
assert_eq!(2, matches.len());
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pub fn iter(&self) -> SetMatchesIter<'_>

Returns an iterator over the indices of the regexes that matched.

This will always produces matches in ascending order, where the index yielded corresponds to the index of the regex that matched with respect to its position when initially building the set.

Example
use regex::RegexSet;

let set = RegexSet::new([
    r"[0-9]",
    r"[a-z]",
    r"[A-Z]",
    r"\p{Greek}",
]).unwrap();
let hay = "βa1";
let matches: Vec<_> = set.matches(hay).iter().collect();
assert_eq!(matches, vec![0, 1, 3]);

Note that SetMatches also implemnets the IntoIterator trait, so this method is not always needed. For example:

use regex::RegexSet;

let set = RegexSet::new([
    r"[0-9]",
    r"[a-z]",
    r"[A-Z]",
    r"\p{Greek}",
]).unwrap();
let hay = "βa1";
let mut matches = vec![];
for index in set.matches(hay) {
    matches.push(index);
}
assert_eq!(matches, vec![0, 1, 3]);

Trait Implementations§

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impl Clone for SetMatches

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fn clone(&self) -> SetMatches

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 SetMatches

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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<'a> IntoIterator for &'a SetMatches

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type IntoIter = SetMatchesIter<'a>

Which kind of iterator are we turning this into?
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type Item = usize

The type of the elements being iterated over.
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fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more
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impl IntoIterator for SetMatches

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type IntoIter = SetMatchesIntoIter

Which kind of iterator are we turning this into?
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type Item = usize

The type of the elements being iterated over.
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fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more

Auto Trait Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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> 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 Twhere 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 Twhere 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 Twhere 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 Twhere 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.