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

   1 use std::collections::{HashMap, VecDeque};
   2
   3 fn main() {
   4     let sample = [1; 5];
   5     let indirect_iter = sample.iter().collect::<Vec<_>>();
   6     indirect_iter.into_iter().map(|x| (x, x + 1)).collect::<HashMap<_, _>>();
   7     let indirect_len = sample.iter().collect::<VecDeque<_>>();
   8     indirect_len.len();
   9     let indirect_empty = sample.iter().collect::<VecDeque<_>>();
  10     indirect_empty.is_empty();
  11     let indirect_contains = sample.iter().collect::<VecDeque<_>>();
  12     indirect_contains.contains(&&5);
  13     let indirect_negative = sample.iter().collect::<Vec<_>>();
  14     indirect_negative.len();
  15     indirect_negative
  16         .into_iter()
  17         .map(|x| (*x, *x + 1))
  18         .collect::<HashMap<_, _>>();
  19
  20     // #6202
  21     let a = "a".to_string();
  22     let sample = vec![a.clone(), "b".to_string(), "c".to_string()];
  23     let non_copy_contains = sample.into_iter().collect::<Vec<_>>();
  24     non_copy_contains.contains(&a);
  25 }