rust-clippy/tests/ui/methods.stderr

error: defining a method called `add` on this type; consider implementing the `std::ops::Add` trait or choosing a less ambiguous name
  --> $DIR/methods.rs:35:5
   |
LL | /     pub fn add(self, other: T) -> T {
LL | |         self
LL | |     }
   | |_____^
   |
   = note: `-D clippy::should-implement-trait` implied by `-D warnings`

error: methods called `into_*` usually take self by value; consider choosing a less ambiguous name
  --> $DIR/methods.rs:70:17
   |
LL |     fn into_u16(&self) -> u16 {
   |                 ^^^^^
   |
   = note: `-D clippy::wrong-self-convention` implied by `-D warnings`

error: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
  --> $DIR/methods.rs:74:21
   |
LL |     fn to_something(self) -> u32 {
   |                     ^^^^

error: methods called `new` usually take no self; consider choosing a less ambiguous name
  --> $DIR/methods.rs:78:12
   |
LL |     fn new(self) -> Self {
   |            ^^^^

error: called `map(f).unwrap_or(a)` on an Option value. This can be done more directly by calling `map_or(a, f)` instead
  --> $DIR/methods.rs:158:13
   |
LL |       let _ = opt.map(|x| x + 1)
   |  _____________^
LL | |                 // Should lint even though this call is on a separate line.
LL | |                .unwrap_or(0);
   | |____________________________^
   |
   = note: `-D clippy::option-map-unwrap-or` implied by `-D warnings`
   = note: replace `map(|x| x + 1).unwrap_or(0)` with `map_or(0, |x| x + 1)`

error: called `map(f).unwrap_or(a)` on an Option value. This can be done more directly by calling `map_or(a, f)` instead
  --> $DIR/methods.rs:162:13
   |
LL |       let _ = opt.map(|x| {
   |  _____________^
LL | |                         x + 1
LL | |                     }
LL | |               ).unwrap_or(0);
   | |____________________________^

error: called `map(f).unwrap_or(a)` on an Option value. This can be done more directly by calling `map_or(a, f)` instead
  --> $DIR/methods.rs:166:13
   |
LL |       let _ = opt.map(|x| x + 1)
   |  _____________^
LL | |                .unwrap_or({
LL | |                     0
LL | |                 });
   | |__________________^

error: called `map(f).unwrap_or(None)` on an Option value. This can be done more directly by calling `and_then(f)` instead
  --> $DIR/methods.rs:171:13
   |
LL |     let _ = opt.map(|x| Some(x + 1)).unwrap_or(None);
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: replace `map(|x| Some(x + 1)).unwrap_or(None)` with `and_then(|x| Some(x + 1))`

error: called `map(f).unwrap_or(None)` on an Option value. This can be done more directly by calling `and_then(f)` instead
  --> $DIR/methods.rs:173:13
   |
LL |       let _ = opt.map(|x| {
   |  _____________^
LL | |         Some(x + 1)
LL | |     }
LL | |     ).unwrap_or(None);
   | |_____________________^

error: called `map(f).unwrap_or(None)` on an Option value. This can be done more directly by calling `and_then(f)` instead
  --> $DIR/methods.rs:177:13
   |
LL |       let _ = opt
   |  _____________^
LL | |         .map(|x| Some(x + 1))
LL | |         .unwrap_or(None);
   | |________________________^
   |
   = note: replace `map(|x| Some(x + 1)).unwrap_or(None)` with `and_then(|x| Some(x + 1))`

error: called `map(f).unwrap_or(a)` on an Option value. This can be done more directly by calling `map_or(a, f)` instead
  --> $DIR/methods.rs:188:13
   |
LL |     let _ = Some("prefix").map(|p| format!("{}.", p)).unwrap_or(id);
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: replace `map(|p| format!("{}.", p)).unwrap_or(id)` with `map_or(id, |p| format!("{}.", p))`

error: called `map(f).unwrap_or_else(g)` on an Option value. This can be done more directly by calling `map_or_else(g, f)` instead
  --> $DIR/methods.rs:192:13
   |
LL |       let _ = opt.map(|x| x + 1)
   |  _____________^
LL | |                 // Should lint even though this call is on a separate line.
LL | |                .unwrap_or_else(|| 0);
   | |____________________________________^
   |
   = note: `-D clippy::option-map-unwrap-or-else` implied by `-D warnings`
   = note: replace `map(|x| x + 1).unwrap_or_else(|| 0)` with `map_or_else(|| 0, |x| x + 1)`

error: called `map(f).unwrap_or_else(g)` on an Option value. This can be done more directly by calling `map_or_else(g, f)` instead
  --> $DIR/methods.rs:196:13
   |
LL |       let _ = opt.map(|x| {
   |  _____________^
LL | |                         x + 1
LL | |                     }
LL | |               ).unwrap_or_else(|| 0);
   | |____________________________________^

error: called `map(f).unwrap_or_else(g)` on an Option value. This can be done more directly by calling `map_or_else(g, f)` instead
  --> $DIR/methods.rs:200:13
   |
LL |       let _ = opt.map(|x| x + 1)
   |  _____________^
LL | |                .unwrap_or_else(||
LL | |                     0
LL | |                 );
   | |_________________^

error: called `map_or(None, f)` on an Option value. This can be done more directly by calling `and_then(f)` instead
  --> $DIR/methods.rs:210:13
   |
LL |     let _ = opt.map_or(None, |x| Some(x + 1));
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using and_then instead: `opt.and_then(|x| Some(x + 1))`
   |
   = note: `-D clippy::option-map-or-none` implied by `-D warnings`

error: called `map_or(None, f)` on an Option value. This can be done more directly by calling `and_then(f)` instead
  --> $DIR/methods.rs:212:13
   |
LL |       let _ = opt.map_or(None, |x| {
   |  _____________^
LL | |                         Some(x + 1)
LL | |                        }
LL | |                 );
   | |_________________^
help: try using and_then instead
   |
LL |     let _ = opt.and_then(|x| {
LL |                         Some(x + 1)
LL |                        });
   |

error: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
  --> $DIR/methods.rs:238:13
   |
LL |     let _ = v.iter().filter(|&x| *x < 0).next();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::filter-next` implied by `-D warnings`
   = note: replace `filter(|&x| *x < 0).next()` with `find(|&x| *x < 0)`

error: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
  --> $DIR/methods.rs:241:13
   |
LL |       let _ = v.iter().filter(|&x| {
   |  _____________^
LL | |                                 *x < 0
LL | |                             }
LL | |                    ).next();
   | |___________________________^

error: called `is_some()` after searching an `Iterator` with find. This is more succinctly expressed by calling `any()`.
  --> $DIR/methods.rs:257:13
   |
LL |     let _ = v.iter().find(|&x| *x < 0).is_some();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::search-is-some` implied by `-D warnings`
   = note: replace `find(|&x| *x < 0).is_some()` with `any(|&x| *x < 0)`

error: called `is_some()` after searching an `Iterator` with find. This is more succinctly expressed by calling `any()`.
  --> $DIR/methods.rs:260:13
   |
LL |       let _ = v.iter().find(|&x| {
   |  _____________^
LL | |                               *x < 0
LL | |                           }
LL | |                    ).is_some();
   | |______________________________^

error: called `is_some()` after searching an `Iterator` with position. This is more succinctly expressed by calling `any()`.
  --> $DIR/methods.rs:266:13
   |
LL |     let _ = v.iter().position(|&x| x < 0).is_some();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: replace `position(|&x| x < 0).is_some()` with `any(|&x| x < 0)`

error: called `is_some()` after searching an `Iterator` with position. This is more succinctly expressed by calling `any()`.
  --> $DIR/methods.rs:269:13
   |
LL |       let _ = v.iter().position(|&x| {
   |  _____________^
LL | |                                   x < 0
LL | |                               }
LL | |                    ).is_some();
   | |______________________________^

error: called `is_some()` after searching an `Iterator` with rposition. This is more succinctly expressed by calling `any()`.
  --> $DIR/methods.rs:275:13
   |
LL |     let _ = v.iter().rposition(|&x| x < 0).is_some();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: replace `rposition(|&x| x < 0).is_some()` with `any(|&x| x < 0)`

error: called `is_some()` after searching an `Iterator` with rposition. This is more succinctly expressed by calling `any()`.
  --> $DIR/methods.rs:278:13
   |
LL |       let _ = v.iter().rposition(|&x| {
   |  _____________^
LL | |                                    x < 0
LL | |                                }
LL | |                    ).is_some();
   | |______________________________^

error: use of `unwrap_or` followed by a function call
  --> $DIR/methods.rs:315:22
   |
LL |     with_constructor.unwrap_or(make());
   |                      ^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(make)`
   |
   = note: `-D clippy::or-fun-call` implied by `-D warnings`

error: use of `unwrap_or` followed by a call to `new`
  --> $DIR/methods.rs:318:5
   |
LL |     with_new.unwrap_or(Vec::new());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_new.unwrap_or_default()`

error: use of `unwrap_or` followed by a function call
  --> $DIR/methods.rs:321:21
   |
LL |     with_const_args.unwrap_or(Vec::with_capacity(12));
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| Vec::with_capacity(12))`

error: use of `unwrap_or` followed by a function call
  --> $DIR/methods.rs:324:14
   |
LL |     with_err.unwrap_or(make());
   |              ^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| make())`

error: use of `unwrap_or` followed by a function call
  --> $DIR/methods.rs:327:19
   |
LL |     with_err_args.unwrap_or(Vec::with_capacity(12));
   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| Vec::with_capacity(12))`

error: use of `unwrap_or` followed by a call to `default`
  --> $DIR/methods.rs:330:5
   |
LL |     with_default_trait.unwrap_or(Default::default());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_default_trait.unwrap_or_default()`

error: use of `unwrap_or` followed by a call to `default`
  --> $DIR/methods.rs:333:5
   |
LL |     with_default_type.unwrap_or(u64::default());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_default_type.unwrap_or_default()`

error: use of `unwrap_or` followed by a function call
  --> $DIR/methods.rs:336:14
   |
LL |     with_vec.unwrap_or(vec![]);
   |              ^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| vec![])`

error: use of `unwrap_or` followed by a function call
  --> $DIR/methods.rs:341:21
   |
LL |     without_default.unwrap_or(Foo::new());
   |                     ^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(Foo::new)`

error: use of `or_insert` followed by a function call
  --> $DIR/methods.rs:344:19
   |
LL |     map.entry(42).or_insert(String::new());
   |                   ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(String::new)`

error: use of `or_insert` followed by a function call
  --> $DIR/methods.rs:347:21
   |
LL |     btree.entry(42).or_insert(String::new());
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(String::new)`

error: use of `unwrap_or` followed by a function call
  --> $DIR/methods.rs:350:21
   |
LL |     let _ = stringy.unwrap_or("".to_owned());
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "".to_owned())`

error: called `.iter().nth()` on a Vec. Calling `.get()` is both faster and more readable
  --> $DIR/methods.rs:361:23
   |
LL |         let bad_vec = some_vec.iter().nth(3);
   |                       ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::iter-nth` implied by `-D warnings`

error: called `.iter().nth()` on a slice. Calling `.get()` is both faster and more readable
  --> $DIR/methods.rs:362:26
   |
LL |         let bad_slice = &some_vec[..].iter().nth(3);
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: called `.iter().nth()` on a slice. Calling `.get()` is both faster and more readable
  --> $DIR/methods.rs:363:31
   |
LL |         let bad_boxed_slice = boxed_slice.iter().nth(3);
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^

error: called `.iter().nth()` on a VecDeque. Calling `.get()` is both faster and more readable
  --> $DIR/methods.rs:364:29
   |
LL |         let bad_vec_deque = some_vec_deque.iter().nth(3);
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: called `.iter_mut().nth()` on a Vec. Calling `.get_mut()` is both faster and more readable
  --> $DIR/methods.rs:369:23
   |
LL |         let bad_vec = some_vec.iter_mut().nth(3);
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: called `.iter_mut().nth()` on a slice. Calling `.get_mut()` is both faster and more readable
  --> $DIR/methods.rs:372:26
   |
LL |         let bad_slice = &some_vec[..].iter_mut().nth(3);
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: called `.iter_mut().nth()` on a VecDeque. Calling `.get_mut()` is both faster and more readable
  --> $DIR/methods.rs:375:29
   |
LL |         let bad_vec_deque = some_vec_deque.iter_mut().nth(3);
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: used unwrap() on an Option value. If you don't want to handle the None case gracefully, consider using expect() to provide a better panic message
  --> $DIR/methods.rs:387:13
   |
LL |     let _ = opt.unwrap();
   |             ^^^^^^^^^^^^
   |
   = note: `-D clippy::option-unwrap-used` implied by `-D warnings`

error: aborting due to 44 previous errors