1639e51f6e
Until some backwards-compatibility hazards are fixed in #23121, these need to be unstable. [breaking-change]
40 lines
1.2 KiB
Rust
40 lines
1.2 KiB
Rust
// Copyright 2014 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(slice_patterns)]
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fn main() {
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let x: Vec<(isize, isize)> = Vec::new();
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let x: &[(isize, isize)] = &x;
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match x {
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[a, (2, 3), _] => (),
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[(1, 2), (2, 3), b] => (), //~ ERROR unreachable pattern
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_ => ()
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}
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let x: Vec<String> = vec!["foo".to_string(),
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"bar".to_string(),
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"baz".to_string()];
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let x: &[String] = &x;
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match x {
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[a, _, _, ..] => { println!("{}", a); }
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[_, _, _, _, _] => { } //~ ERROR unreachable pattern
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_ => { }
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}
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let x: Vec<char> = vec!('a', 'b', 'c');
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let x: &[char] = &x;
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match x {
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['a', 'b', 'c', _tail..] => {}
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['a', 'b', 'c'] => {} //~ ERROR unreachable pattern
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_ => {}
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}
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}
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