src/test/run-pass/new-impl-syntax.rs

   1 // Copyright 2014 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 struct Thingy {
  14     x: int,
  15     y: int
  16 }
  17
  18 impl fmt::Show for Thingy {
  19     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  20         write!(f, "{{ x: {:?}, y: {:?} }}", self.x, self.y)
  21     }
  22 }
  23
  24 struct PolymorphicThingy<T> {
  25     x: T
  26 }
  27
  28 impl<T:fmt::Show> fmt::Show for PolymorphicThingy<T> {
  29     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  30         write!(f, "{:?}", self.x)
  31     }
  32 }
  33
  34 pub fn main() {
  35     println!("{:?}", Thingy { x: 1, y: 2 });
  36     println!("{:?}", PolymorphicThingy { x: Thingy { x: 1, y: 2 } });
  37 }