22179f49e5
This breaks code that uses the `..xs` form anywhere but at the end of a
slice. For example:
match foo {
[ 1, ..xs, 2 ]
[ ..xs, 1, 2 ]
}
Add the `#![feature(advanced_slice_patterns)]` gate to reenable the
syntax.
RFC #54.
Closes #16951.
[breaking-change]
44 lines
1.2 KiB
Rust
44 lines
1.2 KiB
Rust
// 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)]
|
|
|
|
fn a<'a>() -> &'a [int] {
|
|
let vec = vec!(1, 2, 3, 4);
|
|
let vec: &[int] = vec.as_slice(); //~ ERROR does not live long enough
|
|
let tail = match vec {
|
|
[_, ..tail] => tail,
|
|
_ => fail!("a")
|
|
};
|
|
tail
|
|
}
|
|
|
|
fn b<'a>() -> &'a [int] {
|
|
let vec = vec!(1, 2, 3, 4);
|
|
let vec: &[int] = vec.as_slice(); //~ ERROR does not live long enough
|
|
let init = match vec {
|
|
[..init, _] => init,
|
|
_ => fail!("b")
|
|
};
|
|
init
|
|
}
|
|
|
|
fn c<'a>() -> &'a [int] {
|
|
let vec = vec!(1, 2, 3, 4);
|
|
let vec: &[int] = vec.as_slice(); //~ ERROR does not live long enough
|
|
let slice = match vec {
|
|
[_, ..slice, _] => slice,
|
|
_ => fail!("c")
|
|
};
|
|
slice
|
|
}
|
|
|
|
fn main() {}
|