extern crate colored_diff; fn main() { #[derive(Debug, PartialEq)] struct Foo { lorem: &'static str, ipsum: u32, dolor: Result, } let x = Some(Foo { lorem: "Hello World!", ipsum: 42, dolor: Ok("hey".to_string())}); let y = Some(Foo { lorem: "Hello Wrold!", ipsum: 42, dolor: Ok("hey ho!".to_string())}); let x = format!("{:#?}", x); let y = format!("{:#?}", y); println!("{}", colored_diff::PrettyDifference { expected: &x, actual: &y }) }