rust-clippy/tests/ui/eta.stderr

error: redundant closure
  --> $DIR/eta.rs:31:27
   |
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:35:40
   |
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:36:35
   |
LL |     let d = Some(1u8).map(|a| foo((|b| foo2(b))(a))); //is adjusted?
   |                                   ^^^^^^^^^^^^^ help: replace the closure with the function itself: `foo2`

error: this expression borrows a reference (`&u8`) that is immediately dereferenced by the compiler
  --> $DIR/eta.rs:37:21
   |
LL |     all(&[1, 2, 3], &&2, |x, y| below(x, y)); //is adjusted
   |                     ^^^ help: change this to: `&2`
   |
   = note: `-D clippy::needless-borrow` implied by `-D warnings`

error: redundant closure
  --> $DIR/eta.rs:37:26
   |
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:43:27
   |
LL |     let e = Some(1u8).map(|a| divergent(a));
   |                           ^^^^^^^^^^^^^^^^ help: replace the closure with the function itself: `divergent`

error: redundant closure
  --> $DIR/eta.rs:44:27
   |
LL |     let e = Some(1u8).map(|a| generic(a));
   |                           ^^^^^^^^^^^^^^ help: replace the closure with the function itself: `generic`

error: redundant closure
  --> $DIR/eta.rs:90:51
   |
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:91:51
   |
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:93:42
   |
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:97:29
   |
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:98:27
   |
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:100:65
   |
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:163:22
   |
LL |     requires_fn_once(|| x());
   |                      ^^^^^^ help: replace the closure with the function itself: `x`

error: redundant closure
  --> $DIR/eta.rs:170:27
   |
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:175:27
   |
LL |     let a = Some(1u8).map(|a| closure(a));
   |                           ^^^^^^^^^^^^^^ help: replace the closure with the function itself: `closure`

error: redundant closure
  --> $DIR/eta.rs:207:28
   |
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:208:28
   |
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:209:28
   |
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:216:21
   |
LL |         Some(1).map(|n| closure(n));
   |                     ^^^^^^^^^^^^^^ help: replace the closure with the function itself: `&mut closure`

error: redundant closure
  --> $DIR/eta.rs:235:21
   |
LL |     map_str_to_path(|s| s.as_ref());
   |                     ^^^^^^^^^^^^^^ help: replace the closure with the method itself: `std::convert::AsRef::as_ref`

error: aborting due to 21 previous errors