File: simple.rs

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rustc 1.34.2%2Bdfsg1-1
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extern crate diff;

fn main() {
    let left = "foo\nbar\nbaz\nquux";
    let right = "foo\nbaz\nbar\nquux";

    for diff in diff::lines(left, right) {
        match diff {
            diff::Result::Left(l) => println!("-{}", l),
            diff::Result::Both(l, _) => println!(" {}", l),
            diff::Result::Right(r) => println!("+{}", r),
        }
    }
}