src/test/ui/iterators/into-iter-on-arrays-lint.rs

   1 // run-pass
   2 // run-rustfix
   3
   4 fn main() {
   5     let small = [1, 2];
   6     let big = [0u8; 33];
   7
   8     // Expressions that should trigger the lint
   9     small.into_iter();
  10     //~^ WARNING this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter`
  11     //~| WARNING this was previously accepted by the compiler but is being phased out
  12     [1, 2].into_iter();
  13     //~^ WARNING this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter`
  14     //~| WARNING this was previously accepted by the compiler but is being phased out
  15     big.into_iter();
  16     //~^ WARNING this method call currently resolves to `<&[T] as IntoIterator>::into_iter`
  17     //~| WARNING this was previously accepted by the compiler but is being phased out
  18     [0u8; 33].into_iter();
  19     //~^ WARNING this method call currently resolves to `<&[T] as IntoIterator>::into_iter`
  20     //~| WARNING this was previously accepted by the compiler but is being phased out
  21
  22
  23     // Expressions that should not
  24     (&[1, 2]).into_iter();
  25     (&small).into_iter();
  26     (&[0u8; 33]).into_iter();
  27     (&big).into_iter();
  28
  29     for _ in &[1, 2] {}
  30     (&small as &[_]).into_iter();
  31     small[..].into_iter();
  32     std::iter::IntoIterator::into_iter(&[1, 2]);
  33 }