https://crates.io/crates/regex
The Rust regex crate is a regular expression library for the Rust programming language. It provides a fast and efficient way to search, match, and manipulate text using regular expressions.
The main types provided by the regex crate are the Regex and Captures types. The Regex type represents a compiled regular expression pattern that can be used to search for matches in a text string. The Captures type represents the groups captured by a successful match and allows for easy extraction of matched substrings.
The regex crate supports a wide range of regular expression syntax, including Perl-style regular expressions and POSIX extended regular expressions. It also supports Unicode character properties and provides a range of Unicode-aware matchers and modifiers.
The regex crate is highly performant and is designed to handle large inputs efficiently. It provides a range of options for controlling the matching behavior, such as case-insensitive matching, multi-line matching, and greedy or lazy quantifiers.
Example:
use regex::Regex;
fn main() {
// Find the first occurance of a digit char and word char
let r = Regex::new(r"(\d)(\w)").unwrap();
let captures = r.captures("a1b2c3").unwrap();
println!("{:?}", captures)
}Output:
Captures({0: Some("1b"), 1: Some("1"), 2: Some("b")})