Struct regex::SetMatches

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

A set of matches returned by a regex set.

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

Implementations

impl SetMatches

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());

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));

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());

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

impl Clone for SetMatches

fn clone(&self) -> SetMatches

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SetMatches

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

Formats the value using the given formatter.

impl<'a> IntoIterator for &'a SetMatches

type IntoIter = SetMatchesIter<'a>

Which kind of iterator are we turning this into?

type Item = usize

The type of the elements being iterated over.

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl IntoIterator for SetMatches

type IntoIter = SetMatchesIntoIter

Which kind of iterator are we turning this into?

type Item = usize

The type of the elements being iterated over.

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.