src/test/ui/borrowck/borrowck-vec-pattern-element-loan.rs

   1 #![feature(slice_patterns)]
   2
   3 fn a<'a>() -> &'a [isize] {
   4     let vec = vec![1, 2, 3, 4];
   5     let vec: &[isize] = &vec;
   6     let tail = match vec {
   7         &[_, ref tail @ ..] => tail,
   8         _ => panic!("a")
   9     };
  10     tail //~ ERROR cannot return value referencing local variable `vec`
  11 }
  12
  13 fn b<'a>() -> &'a [isize] {
  14     let vec = vec![1, 2, 3, 4];
  15     let vec: &[isize] = &vec;
  16     let init = match vec {
  17         &[ref init @ .., _] => init,
  18         _ => panic!("b")
  19     };
  20     init //~ ERROR cannot return value referencing local variable `vec`
  21 }
  22
  23 fn c<'a>() -> &'a [isize] {
  24     let vec = vec![1, 2, 3, 4];
  25     let vec: &[isize] = &vec;
  26     let slice = match vec {
  27         &[_, ref slice @ .., _] => slice,
  28         _ => panic!("c")
  29     };
  30     slice //~ ERROR cannot return value referencing local variable `vec`
  31 }
  32
  33 fn main() {}