rust-clippy/tests/ui/needless_collect.stderr

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:9:29
   |
LL |     let len = sample.iter().collect::<Vec<_>>().len();
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `count()`
   |
   = note: `-D clippy::needless-collect` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::needless_collect)]`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:10:22
   |
LL |     if sample.iter().collect::<Vec<_>>().is_empty() {
   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `next().is_none()`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:13:28
   |
LL |     sample.iter().cloned().collect::<Vec<_>>().contains(&1);
   |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `any(|x| x == 1)`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:18:35
   |
LL |     sample.iter().map(|x| (x, x)).collect::<HashMap<_, _>>().is_empty();
   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `next().is_none()`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:19:35
   |
LL |     sample.iter().map(|x| (x, x)).collect::<BTreeMap<_, _>>().is_empty();
   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `next().is_none()`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:26:19
   |
LL |     sample.iter().collect::<LinkedList<_>>().len();
   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `count()`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:27:19
   |
LL |     sample.iter().collect::<LinkedList<_>>().is_empty();
   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `next().is_none()`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:28:28
   |
LL |     sample.iter().cloned().collect::<LinkedList<_>>().contains(&1);
   |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `any(|x| x == 1)`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:29:19
   |
LL |     sample.iter().collect::<LinkedList<_>>().contains(&&1);
   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `any(|x| x == &1)`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:32:19
   |
LL |     sample.iter().collect::<BinaryHeap<_>>().len();
   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `count()`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:33:19
   |
LL |     sample.iter().collect::<BinaryHeap<_>>().is_empty();
   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `next().is_none()`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:38:27
   |
LL |     let _ = sample.iter().collect::<HashSet<_>>().is_empty();
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `next().is_none()`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:39:27
   |
LL |     let _ = sample.iter().collect::<HashSet<_>>().contains(&&0);
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `any(|x| x == &0)`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:61:27
   |
LL |     let _ = sample.iter().collect::<VecWrapper<_>>().is_empty();
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `next().is_none()`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:62:27
   |
LL |     let _ = sample.iter().collect::<VecWrapper<_>>().contains(&&0);
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `any(|x| x == &0)`

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:66:40
   |
LL |         Vec::<u8>::new().extend((0..10).collect::<Vec<_>>());
   |                                        ^^^^^^^^^^^^^^^^^^^^ help: remove this call

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:67:20
   |
LL |         foo((0..10).collect::<Vec<_>>());
   |                    ^^^^^^^^^^^^^^^^^^^^ help: remove this call

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:68:49
   |
LL |         bar((0..10).collect::<Vec<_>>(), (0..10).collect::<Vec<_>>());
   |                                                 ^^^^^^^^^^^^^^^^^^^^ help: remove this call

error: avoid using `collect()` when not needed
  --> $DIR/needless_collect.rs:69:37
   |
LL |         baz((0..10), (), ('a'..='z').collect::<Vec<_>>())
   |                                     ^^^^^^^^^^^^^^^^^^^^ help: remove this call

error: aborting due to 19 previous errors