rust/src/test/run-pass/class-poly-methods.rs

// Copyright 2012 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.

struct cat<U> {
    info : Vec<U> ,
    meows : uint,

    how_hungry : int,
}

impl<U> cat<U> {
    pub fn speak<T>(&mut self, stuff: Vec<T> ) {
        self.meows += stuff.len();
    }
    pub fn meow_count(&mut self) -> uint { self.meows }
}

fn cat<U>(in_x : uint, in_y : int, in_info: Vec<U> ) -> cat<U> {
    cat {
        meows: in_x,
        how_hungry: in_y,
        info: in_info
    }
}

pub fn main() {
  let mut nyan : cat<int> = cat::<int>(52u, 99, vec!(9));
  let mut kitty = cat(1000u, 2, vec!(~"tabby"));
  assert_eq!(nyan.how_hungry, 99);
  assert_eq!(kitty.how_hungry, 2);
  nyan.speak(vec!(1,2,3));
  assert_eq!(nyan.meow_count(), 55u);
  kitty.speak(vec!(~"meow", ~"mew", ~"purr", ~"chirp"));
  assert_eq!(kitty.meow_count(), 1004u);
}