Regex Engine implementation in Rust

Simple regex engine implementation in Rust using Automatas.

Supported operators

• Or a|b - Matches "a" or "b".
• And ab - Matches "a" and "b", the And operator is implicit.
• ClosureStar a* - Matches zero or more "a".
• ClosurePlus a+ - Matches one or more "a".
• Character Class [a-zA-Z] - Allow the creation of ranges and the Or operator is implicit inside the Character Class, the example is matching one literal between "a" and "z", or "A" and "Z" inclusive.
• Ranges [a-z] - Matches one literal between "a" and "z" inclusive.
• Dot . - Matches a single UTF-8 char.

Example

use regex::regex::Regex;

fn main() {
    let re = Regex::new("[a-z]").unwrap();

    assert!(!re.is_match(""));
    assert!(!re.is_match("aa"));
    assert!(re.is_match("a"));
    assert!(re.is_match("z"));
}