// include the latest version of the regex crate in your Cargo.toml
extern crate regex;
use regex::Regex;
fn main() {
let regex = Regex::new(r"(?:spirit_animals\s*=\s*\{|(?!^)\G)\s*'\K([^']+)('\s*:\s*'[^']+',?)").unwrap();
let string = "var cool_spirit_animals = {
'Abel': 'unicorn',
'Bob': 'lion'
};
var spirit_plants = {
'Cain': 'venus fly trap'
};
var stupid_spirit_animals = {
'Dan': 'lamprey'
};
var spirit_vampires = {
'Emily': 'Buffy',
'Fred': 'Dracula'
};";
let substitution = "$1 Smith$2";
// result will be a String with the substituted value
let result = regex.replace_all(string, substitution);
println!("{}", result);
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/