rust-clippy/tests/ui/eta.stderr

error: redundant closure
  --> $DIR/eta.rs:28:27
   |
LL |     let a = Some(1u8).map(|a| foo(a));
   |                           ^^^^^^^^^^ help: replace the closure with the function itself: `foo`
   |
   = note: `-D clippy::redundant-closure` implied by `-D warnings`

error: redundant closure
  --> $DIR/eta.rs:32:40
   |
LL |     let _: Option<Vec<u8>> = true.then(|| vec![]); // special case vec!
   |                                        ^^^^^^^^^ help: replace the closure with `Vec::new`: `std::vec::Vec::new`

error: redundant closure
  --> $DIR/eta.rs:33:35
   |
LL |     let d = Some(1u8).map(|a| foo((|b| foo2(b))(a))); //is adjusted?
   |                                   ^^^^^^^^^^^^^ help: replace the closure with the function itself: `foo2`

error: redundant closure
  --> $DIR/eta.rs:34:26
   |
LL |     all(&[1, 2, 3], &&2, |x, y| below(x, y)); //is adjusted
   |                          ^^^^^^^^^^^^^^^^^^ help: replace the closure with the function itself: `below`

error: redundant closure
  --> $DIR/eta.rs:41:27
   |
LL |     let e = Some(1u8).map(|a| generic(a));
   |                           ^^^^^^^^^^^^^^ help: replace the closure with the function itself: `generic`

error: redundant closure
  --> $DIR/eta.rs:93:51
   |
LL |     let e = Some(TestStruct { some_ref: &i }).map(|a| a.foo());
   |                                                   ^^^^^^^^^^^ help: replace the closure with the method itself: `TestStruct::foo`
   |
   = note: `-D clippy::redundant-closure-for-method-calls` implied by `-D warnings`

error: redundant closure
  --> $DIR/eta.rs:94:51
   |
LL |     let e = Some(TestStruct { some_ref: &i }).map(|a| a.trait_foo());
   |                                                   ^^^^^^^^^^^^^^^^^ help: replace the closure with the method itself: `TestTrait::trait_foo`

error: redundant closure
  --> $DIR/eta.rs:96:42
   |
LL |     let e = Some(&mut vec![1, 2, 3]).map(|v| v.clear());
   |                                          ^^^^^^^^^^^^^ help: replace the closure with the method itself: `std::vec::Vec::clear`

error: redundant closure
  --> $DIR/eta.rs:100:29
   |
LL |     let e = Some("str").map(|s| s.to_string());
   |                             ^^^^^^^^^^^^^^^^^ help: replace the closure with the method itself: `std::string::ToString::to_string`

error: redundant closure
  --> $DIR/eta.rs:101:27
   |
LL |     let e = Some('a').map(|s| s.to_uppercase());
   |                           ^^^^^^^^^^^^^^^^^^^^ help: replace the closure with the method itself: `char::to_uppercase`

error: redundant closure
  --> $DIR/eta.rs:103:65
   |
LL |     let e: std::vec::Vec<char> = vec!['a', 'b', 'c'].iter().map(|c| c.to_ascii_uppercase()).collect();
   |                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace the closure with the method itself: `char::to_ascii_uppercase`

error: redundant closure
  --> $DIR/eta.rs:166:22
   |
LL |     requires_fn_once(|| x());
   |                      ^^^^^^ help: replace the closure with the function itself: `x`

error: redundant closure
  --> $DIR/eta.rs:173:27
   |
LL |     let a = Some(1u8).map(|a| foo_ptr(a));
   |                           ^^^^^^^^^^^^^^ help: replace the closure with the function itself: `foo_ptr`

error: redundant closure
  --> $DIR/eta.rs:178:27
   |
LL |     let a = Some(1u8).map(|a| closure(a));
   |                           ^^^^^^^^^^^^^^ help: replace the closure with the function itself: `closure`

error: redundant closure
  --> $DIR/eta.rs:210:28
   |
LL |     x.into_iter().for_each(|x| add_to_res(x));
   |                            ^^^^^^^^^^^^^^^^^ help: replace the closure with the function itself: `&mut add_to_res`

error: redundant closure
  --> $DIR/eta.rs:211:28
   |
LL |     y.into_iter().for_each(|x| add_to_res(x));
   |                            ^^^^^^^^^^^^^^^^^ help: replace the closure with the function itself: `&mut add_to_res`

error: redundant closure
  --> $DIR/eta.rs:212:28
   |
LL |     z.into_iter().for_each(|x| add_to_res(x));
   |                            ^^^^^^^^^^^^^^^^^ help: replace the closure with the function itself: `add_to_res`

error: redundant closure
  --> $DIR/eta.rs:219:21
   |
LL |         Some(1).map(|n| closure(n));
   |                     ^^^^^^^^^^^^^^ help: replace the closure with the function itself: `&mut closure`

error: redundant closure
  --> $DIR/eta.rs:223:21
   |
LL |         Some(1).map(|n| in_loop(n));
   |                     ^^^^^^^^^^^^^^ help: replace the closure with the function itself: `in_loop`

error: redundant closure
  --> $DIR/eta.rs:316:18
   |
LL |     takes_fn_mut(|| f());
   |                  ^^^^^^ help: replace the closure with the function itself: `&mut f`

error: redundant closure
  --> $DIR/eta.rs:319:19
   |
LL |     takes_fn_once(|| f());
   |                   ^^^^^^ help: replace the closure with the function itself: `&mut f`

error: redundant closure
  --> $DIR/eta.rs:323:26
   |
LL |     move || takes_fn_mut(|| f_used_once())
   |                          ^^^^^^^^^^^^^^^^ help: replace the closure with the function itself: `&mut f_used_once`

error: redundant closure
  --> $DIR/eta.rs:335:19
   |
LL |     array_opt.map(|a| a.as_slice());
   |                   ^^^^^^^^^^^^^^^^ help: replace the closure with the method itself: `<[u8; 3]>::as_slice`

error: redundant closure
  --> $DIR/eta.rs:338:19
   |
LL |     slice_opt.map(|s| s.len());
   |                   ^^^^^^^^^^^ help: replace the closure with the method itself: `<[u8]>::len`

error: redundant closure
  --> $DIR/eta.rs:341:17
   |
LL |     ptr_opt.map(|p| p.is_null());
   |                 ^^^^^^^^^^^^^^^ help: replace the closure with the method itself: `<*const usize>::is_null`

error: redundant closure
  --> $DIR/eta.rs:345:17
   |
LL |     dyn_opt.map(|d| d.method_on_dyn());
   |                 ^^^^^^^^^^^^^^^^^^^^^ help: replace the closure with the method itself: `<dyn TestTrait>::method_on_dyn`

error: aborting due to 26 previous errors