| // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| #![allow(non_camel_case_types)] |
| #![allow(dead_code)] |
| #[derive(Clone, Debug)] |
| enum foo { |
| a(usize), |
| b(String), |
| } |
| |
| fn check_log<T: std::fmt::Debug>(exp: String, v: T) { |
| assert_eq!(exp, format!("{:?}", v)); |
| } |
| |
| pub fn main() { |
| let mut x = Some(foo::a(22)); |
| let exp = "Some(a(22))".to_string(); |
| let act = format!("{:?}", x); |
| assert_eq!(act, exp); |
| check_log(exp, x); |
| |
| x = None; |
| let exp = "None".to_string(); |
| let act = format!("{:?}", x); |
| assert_eq!(act, exp); |
| check_log(exp, x); |
| } |