main.rs

use std::error::Error;
use std::io;
use std::io::prelude::*;
use std::process;

macro_rules! strerr {
    ($($tt:tt)*) => (Err(From::from(&*format!($($tt)*))));
}

type CliResult<T> = Result<T, Box<Error + Send>>;

main.rs

extern crate regex;

use std::error::Error;
use std::io;
use std::io::prelude::*;
use std::process;

use regex::Regex;

type CliResult<T> = Result<T, Box<Error + Send>>;