1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
// Copyright 2014 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.
#![feature(advanced_slice_patterns)]
#![feature(slice_patterns)]
use std::ops::Add;
fn foo<T: Add<Output=T> + Clone>([x, y, z]: [T; 3]) -> (T, T, T) {
(x.clone(), x.clone() + y.clone(), x + y + z)
}
fn bar(a: &'static str, b: &'static str) -> [&'static str; 4] {
[a, b, b, a]
}
fn main() {
assert_eq!(foo([1, 2, 3]), (1, 3, 6));
let [a, b, c, d] = bar("foo", "bar");
assert_eq!(a, "foo");
assert_eq!(b, "bar");
assert_eq!(c, "bar");
assert_eq!(d, "foo");
let [a, _, _, d] = bar("baz", "foo");
assert_eq!(a, "baz");
assert_eq!(d, "baz");
let out = bar("baz", "foo");
let [a, xs.., d] = out;
assert_eq!(a, "baz");
assert!(xs == ["foo", "foo"]);
assert_eq!(d, "baz");
}
|
