src/test/run-pass/deriving-show-2.rs

   1 // Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 use std::fmt;
  12
  13 #[derive(Debug)]
  14 enum A {}
  15 #[derive(Debug)]
  16 enum B { B1, B2, B3 }
  17 #[derive(Debug)]
  18 enum C { C1(isize), C2(B), C3(String) }
  19 #[derive(Debug)]
  20 enum D { D1{ a: isize } }
  21 #[derive(Debug)]
  22 struct E;
  23 #[derive(Debug)]
  24 struct F(isize);
  25 #[derive(Debug)]
  26 struct G(isize, isize);
  27 #[derive(Debug)]
  28 struct H { a: isize }
  29 #[derive(Debug)]
  30 struct I { a: isize, b: isize }
  31 #[derive(Debug)]
  32 struct J(Custom);
  33
  34 struct Custom;
  35 impl fmt::Debug for Custom {
  36     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  37         write!(f, "yay")
  38     }
  39 }
  40
  41 trait ToDebug {
  42     fn to_show(&self) -> String;
  43 }
  44
  45 impl<T: fmt::Debug> ToDebug for T {
  46     fn to_show(&self) -> String {
  47         format!("{:?}", self)
  48     }
  49 }
  50
  51 pub fn main() {
  52     assert_eq!(B::B1.to_show(), "B1".to_string());
  53     assert_eq!(B::B2.to_show(), "B2".to_string());
  54     assert_eq!(C::C1(3).to_show(), "C1(3)".to_string());
  55     assert_eq!(C::C2(B::B2).to_show(), "C2(B2)".to_string());
  56     assert_eq!(D::D1{ a: 2 }.to_show(), "D1 { a: 2 }".to_string());
  57     assert_eq!(E.to_show(), "E".to_string());
  58     assert_eq!(F(3).to_show(), "F(3)".to_string());
  59     assert_eq!(G(3, 4).to_show(), "G(3, 4)".to_string());
  60     assert_eq!(I{ a: 2, b: 4 }.to_show(), "I { a: 2, b: 4 }".to_string());
  61     assert_eq!(J(Custom).to_show(), "J(yay)".to_string());
  62 }