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]
51 lines
1.4 KiB
Rust
51 lines
1.4 KiB
Rust
// Copyright 2012 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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#![feature(advanced_slice_patterns)]
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struct Foo(int, int, int, int);
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struct Bar{a: int, b: int, c: int, d: int}
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pub fn main() {
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let Foo(..) = Foo(5, 5, 5, 5);
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let Foo(..) = Foo(5, 5, 5, 5);
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let Bar{..} = Bar{a: 5, b: 5, c: 5, d: 5};
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//let (..) = (5, 5, 5, 5);
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//let Foo(a, b, ..) = Foo(5, 5, 5, 5);
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//let Foo(.., d) = Foo(5, 5, 5, 5);
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//let (a, b, ..) = (5, 5, 5, 5);
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//let (.., c, d) = (5, 5, 5, 5);
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let Bar{b: b, ..} = Bar{a: 5, b: 5, c: 5, d: 5};
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match [5i, 5, 5, 5] {
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[..] => { }
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}
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match [5i, 5, 5, 5] {
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[a, ..] => { }
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}
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match [5i, 5, 5, 5] {
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[.., b] => { }
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}
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match [5i, 5, 5, 5] {
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[a, .., b] => { }
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}
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match [5i, 5, 5] {
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[..] => { }
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}
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match [5i, 5, 5] {
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[a, ..] => { }
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}
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match [5i, 5, 5] {
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[.., a] => { }
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}
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match [5i, 5, 5] {
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[a, .., b] => { }
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}
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}
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