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

   1 error: avoid using `collect()` when not needed
   2   --> $DIR/needless_collect_indirect.rs:5:5
   3    |
   4 LL | /     let indirect_iter = sample.iter().collect::<Vec<_>>();
   5 LL | |     indirect_iter.into_iter().map(|x| (x, x + 1)).collect::<HashMap<_, _>>();
   6    | |____^
   7    |
   8    = note: `-D clippy::needless-collect` implied by `-D warnings`
   9 help: Use the original Iterator instead of collecting it and then producing a new one
  10    |
  11 LL |
  12 LL |     sample.iter().map(|x| (x, x + 1)).collect::<HashMap<_, _>>();
  13    |
  14
  15 error: avoid using `collect()` when not needed
  16   --> $DIR/needless_collect_indirect.rs:7:5
  17    |
  18 LL | /     let indirect_len = sample.iter().collect::<VecDeque<_>>();
  19 LL | |     indirect_len.len();
  20    | |____^
  21    |
  22 help: Take the original Iterator's count instead of collecting it and finding the length
  23    |
  24 LL |
  25 LL |     sample.iter().count();
  26    |
  27
  28 error: avoid using `collect()` when not needed
  29   --> $DIR/needless_collect_indirect.rs:9:5
  30    |
  31 LL | /     let indirect_empty = sample.iter().collect::<VecDeque<_>>();
  32 LL | |     indirect_empty.is_empty();
  33    | |____^
  34    |
  35 help: Check if the original Iterator has anything instead of collecting it and seeing if it's empty
  36    |
  37 LL |
  38 LL |     sample.iter().next().is_none();
  39    |
  40
  41 error: avoid using `collect()` when not needed
  42   --> $DIR/needless_collect_indirect.rs:11:5
  43    |
  44 LL | /     let indirect_contains = sample.iter().collect::<VecDeque<_>>();
  45 LL | |     indirect_contains.contains(&&5);
  46    | |____^
  47    |
  48 help: Check if the original Iterator contains an element instead of collecting then checking
  49    |
  50 LL |
  51 LL |     sample.iter().any(|x| x == &5);
  52    |
  53
  54 error: avoid using `collect()` when not needed
  55   --> $DIR/needless_collect_indirect.rs:23:5
  56    |
  57 LL | /     let non_copy_contains = sample.into_iter().collect::<Vec<_>>();
  58 LL | |     non_copy_contains.contains(&a);
  59    | |____^
  60    |
  61 help: Check if the original Iterator contains an element instead of collecting then checking
  62    |
  63 LL |
  64 LL |     sample.into_iter().any(|x| x == a);
  65    |
  66
  67 error: aborting due to 5 previous errors
  68