rust/src/test/run-pass/class-cast-to-trait-cross-crate.rs

61 lines
1.4 KiB
Rust

// 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.
// xfail-test
use to_str::*;
use to_str::to_str;
class cat : to_str {
priv {
let mut meows : uint;
fn meow() {
error!("Meow");
self.meows += 1u;
if self.meows % 5u == 0u {
self.how_hungry += 1;
}
}
}
let mut how_hungry : int;
let name : str;
new(in_x : uint, in_y : int, in_name: str)
{ self.meows = in_x; self.how_hungry = in_y; self.name = in_name; }
fn speak() { self.meow(); }
fn eat() -> bool {
if self.how_hungry > 0 {
error!("OM NOM NOM");
self.how_hungry -= 2;
return true;
}
else {
error!("Not hungry!");
return false;
}
}
fn to_str() -> str { self.name }
}
fn print_out<T:to_str>(thing: T, expected: str) {
let actual = thing.to_str();
debug!("%s", actual);
fail_unless!((actual == expected));
}
pub fn main() {
let nyan : to_str = cat(0u, 2, "nyan") as to_str;
print_out(nyan, "nyan");
}