代码

use regex::{Regex, Captures};
use itertools::Itertools;
use std::error::Error;


fn main() -> Result<(), Box<dyn Error>> {
    let s = "123-4567-89,987-6543-21";
    let r = Regex::new(r"\d{3}-(\d{4})-\d{2}")?;
    if r.is_match(s) { // if let m = r.find(s) {
        println!("Found Matches:")
    }
    for (i, c) in r.captures_iter(&s).enumerate() {
        for j in 0..c.len() {
            println!("group {},{} : {}", i, j, &c[j]);
        }
    }
 
    let r2 = Regex::new(r"(\d+)-(\d+)-(\d+)")?;
    let s2 = r2.replace_all(&s, "$3-$1-$2");
    println!("{}", s2);
 
    let r3 = Regex::new(r"\d+")?;
    let s3 = r3.replace_all(&s, |c: &Captures| c[0].chars().rev().collect::<String>());
    println!("{}", s3);
 
    let r4 = Regex::new("%(begin|next|end)%")?;
    let s4 = "%begin%hello%next%world%end%";
    let v = r4.split(s4).collect_vec();
    println!("{:?}", v);
 
    Ok(())
}

Cargo.toml:

[dependencies]
itertools = "0.10.1"
regex ="1.5.4"

可以根据错误提示在crates.io中查找依赖

正则语法：https://docs.rs/regex/1.5.4/regex/#syntax

 

参考 ：https://www.cnblogs.com/zwvista/p/12783743.html

https://blog.csdn.net/wsp_1138886114/article/details/116519242