src/tools/clippy/tests/ui/range.rs

   1 #![feature(iterator_step_by)]
   2 #![feature(inclusive_range_syntax)]
   3 #![feature(plugin)]
   4 #![plugin(clippy)]
   5
   6 struct NotARange;
   7 impl NotARange {
   8     fn step_by(&self, _: u32) {}
   9 }
  10
  11 #[warn(iterator_step_by_zero, range_zip_with_len)]
  12 fn main() {
  13     let _ = (0..1).step_by(0);
  14     // No warning for non-zero step
  15     let _ = (0..1).step_by(1);
  16
  17     let _ = (1..).step_by(0);
  18     let _ = (1...2).step_by(0);
  19
  20     let x = 0..1;
  21     let _ = x.step_by(0);
  22
  23     // No error, not a range.
  24     let y = NotARange;
  25     y.step_by(0);
  26
  27     let v1 = vec![1,2,3];
  28     let v2 = vec![4,5];
  29     let _x = v1.iter().zip(0..v1.len());
  30     let _y = v1.iter().zip(0..v2.len()); // No error
  31
  32     // check const eval
  33     let _ = v1.iter().step_by(2/3);
  34 }