src/test/compile-fail/borrowck/borrowck-move-out-of-vec-tail.rs

   1 // Copyright 2014 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 // Test that we do not permit moves from &[] matched by a vec pattern.
  12
  13 #![feature(slice_patterns)]
  14
  15 #[derive(Clone, Debug)]
  16 struct Foo {
  17     string: String
  18 }
  19
  20 pub fn main() {
  21     let x = vec!(
  22         Foo { string: "foo".to_string() },
  23         Foo { string: "bar".to_string() },
  24         Foo { string: "baz".to_string() }
  25     );
  26     let x: &[Foo] = &x;
  27     match x {
  28         [_, tail..] => {
  29             match tail {
  30                 [Foo { string: a }, //~ ERROR cannot move out of borrowed content
  31                  Foo { string: b }] => {
  32                     //~^^ NOTE attempting to move value to here
  33                     //~^^ NOTE and here
  34                 }
  35                 _ => {
  36                     unreachable!();
  37                 }
  38             }
  39             let z = tail[0].clone();
  40             println!("{:?}", z);
  41         }
  42         _ => {
  43             unreachable!();
  44         }
  45     }
  46 }