9e3d0b002a
This breaks a fair amount of code. The typical patterns are:
* `for _ in range(0, 10)`: change to `for _ in range(0u, 10)`;
* `println!("{}", 3)`: change to `println!("{}", 3i)`;
* `[1, 2, 3].len()`: change to `[1i, 2, 3].len()`.
RFC #30. Closes #6023.
[breaking-change]
45 lines
1.3 KiB
Rust
45 lines
1.3 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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trait Speak {
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fn say(&self, s:&str) -> String;
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fn hi(&self) -> String { hello(self) }
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}
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fn hello<S:Speak>(s:&S) -> String{
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s.say("hello")
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}
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impl Speak for int {
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fn say(&self, s:&str) -> String {
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format!("{}: {}", s, *self)
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}
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}
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impl<T: Speak> Speak for Option<T> {
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fn say(&self, s:&str) -> String {
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match *self {
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None => format!("{} - none", s),
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Some(ref x) => { format!("something!{}", x.say(s)) }
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}
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}
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}
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pub fn main() {
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assert_eq!(3i.hi(), "hello: 3".to_string());
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assert_eq!(Some(Some(3i)).hi(),
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"something!something!hello: 3".to_string());
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assert_eq!(None::<int>.hi(), "hello - none".to_string());
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assert_eq!(Some(None::<int>).hi(), "something!hello - none".to_string());
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assert_eq!(Some(3i).hi(), "something!hello: 3".to_string());
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}
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