src/test/compile-fail/pat-slice-old-style.rs

   1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 #![feature(slice_patterns)]
  12
  13 // NB: this test was introduced in #23121 and will have to change when default match binding modes
  14 // stabilizes.
  15
  16 fn slice_pat(x: &[u8]) {
  17     // OLD!
  18     match x {
  19         [a, b..] => {},
  20         //~^ ERROR expected an array or slice, found `&[u8]`
  21         //~| HELP the semantics of slice patterns changed recently; see issue #23121
  22         _ => panic!(),
  23     }
  24 }
  25
  26 fn main() {
  27     slice_pat("foo".as_bytes());
  28 }