Add tests for some default method things.

This commit is contained in:
Michael Sullivan 2013-06-28 17:47:44 -07:00
parent c05165bf93
commit 9340fd5ce0
3 changed files with 110 additions and 0 deletions

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// Copyright 2013 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.
pub trait Clone2 {
fn clone(&self) -> Self;
}
trait Getter<T: Clone2> {
fn get(&self) -> T;
}
impl Getter<int> for int { //~ ERROR failed to find an implementation of trait Clone2 for int
fn get(&self) -> int { *self }
}
fn main() { }

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// Copyright 2013 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(default_methods)]
trait Speak {
fn say(&self, s:&str) -> ~str;
fn hi(&self) -> ~str { hello(self) }
}
fn hello<S:Speak>(s:&S) -> ~str{
s.say("hello")
}
impl Speak for int {
fn say(&self, s:&str) -> ~str {
fmt!("%s: %d", s, *self)
}
}
impl<T: Speak> Speak for Option<T> {
fn say(&self, s:&str) -> ~str {
match *self {
None => fmt!("%s - none", s),
Some(ref x) => { ~"something!" + x.say(s) }
}
}
}
fn main() {
assert_eq!(3.hi(), ~"hello: 3");
assert_eq!(Some(Some(3)).hi(), ~"something!something!hello: 3");
assert_eq!(None::<int>.hi(), ~"hello - none");
// These fail because of a bug in monomorphization's ID generation.
//assert_eq!(Some(None::<int>).hi(), ~"something!hello - none");
//assert_eq!(Some(3).hi(), ~"something!hello: 3");
}

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// Copyright 2013 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.
pub trait Clone2 {
/// Returns a copy of the value. The contents of owned pointers
/// are copied to maintain uniqueness, while the contents of
/// managed pointers are not copied.
fn clone(&self) -> Self;
}
#[allow(default_methods)]
trait Getter<T: Clone> {
fn do_get(&self) -> T;
fn do_get2(&self) -> (T, T) {
let x = self.do_get();
(x.clone(), x.clone())
}
}
impl Getter<int> for int {
fn do_get(&self) -> int { *self }
}
impl<T: Clone> Getter<T> for Option<T> {
fn do_get(&self) -> T { self.get_ref().clone() }
}
fn main() {
assert_eq!(3.do_get2(), (3, 3));
assert_eq!(Some(~"hi").do_get2(), (~"hi", ~"hi"));
}