rustlings/src/main.rs

#[macro_use]
extern crate quicli;
extern crate ansi_term;

use ansi_term::Colour::{Green, Red, Yellow};
use quicli::prelude::*;

macro_rules! verify {
    ($left:expr, $right:expr, $str:expr) => {
        if ($left == $right) {
            println!("{} {}", Green.bold().paint("PASS"), $str);
        } else {
            println!("{} {}", Red.bold().paint("FAIL"), $str);
            println!("\tYou submitted {}, but that's not correct!", $left);
            println!("\tPlease correct your code to make this test pass!");
        }
    };
}

macro_rules! verify_easy {
    ($str:expr, $left:expr, $right:expr) => {
        if ($left == $right) {
            println!("{} {}", Green.bold().paint("PASS"), $str);
        } else {
            println!("{} {}", Red.bold().paint("FAIL"), $str);
            println!("\tExpected: {}", $right);
            println!("\tGot: {}", $left);
            println!("\tPlease correct your code to make this test pass!");
        }
    };
}

mod about_variables;

#[derive(Debug, StructOpt)]
struct Cli {
    exercise: Option<String>,
}

main!(|args: Cli| if let Some(e) = args.exercise {
    println!("selected {}", e);
} else {
    println!("Welcome to {}", Yellow.paint("rustlings"));
    verify!(2, 1, "One equals one");
});