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:31:5
   |
31 |     pub fn add(self, other: T) -> T { self }
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = 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:42:17
   |
42 |     fn into_u16(&self) -> u16 { 0 }
   |                 ^^^^^
   |
   = 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:44:21
   |
44 |     fn to_something(self) -> u32 { 0 }
   |                     ^^^^

error: methods called `new` usually take no self; consider choosing a less ambiguous name
  --> $DIR/methods.rs:46:12
   |
46 |     fn new(self) -> Self { unimplemented!(); }
   |            ^^^^

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:114:13
    |
114 |       let _ = opt.map(|x| x + 1)
    |  _____________^
115 | |
116 | |                .unwrap_or(0); // should lint even though this call is on a separate line
    | |____________________________^
    |
    = 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:118:13
    |
118 |       let _ = opt.map(|x| {
    |  _____________^
119 | |                         x + 1
120 | |                     }
121 | |               ).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:122:13
    |
122 |       let _ = opt.map(|x| x + 1)
    |  _____________^
123 | |                .unwrap_or({
124 | |                     0
125 | |                 });
    | |__________________^

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:127:13
    |
127 |     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:129:13
    |
129 |       let _ = opt.map(|x| {
    |  _____________^
130 | |         Some(x + 1)
131 | |     }
132 | |     ).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:133:13
    |
133 |       let _ = opt
    |  _____________^
134 | |         .map(|x| Some(x + 1))
135 | |         .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_else(g)` on an Option value. This can be done more directly by calling `map_or_else(g, f)` instead
   --> $DIR/methods.rs:141:13
    |
141 |       let _ = opt.map(|x| x + 1)
    |  _____________^
142 | |
143 | |                .unwrap_or_else(|| 0); // should lint even though this call is on a separate line
    | |____________________________________^
    |
    = 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:145:13
    |
145 |       let _ = opt.map(|x| {
    |  _____________^
146 | |                         x + 1
147 | |                     }
148 | |               ).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:149:13
    |
149 |       let _ = opt.map(|x| x + 1)
    |  _____________^
150 | |                .unwrap_or_else(||
151 | |                     0
152 | |                 );
    | |_________________^

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:158:13
    |
158 |     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:160:13
    |
160 |       let _ = opt.map_or(None, |x| {
    |  _____________^
161 | |                         Some(x + 1)
162 | |                        }
163 | |                 );
    | |_________________^
help: try using and_then instead
    |
160 |     let _ = opt.and_then(|x| {
161 |                         Some(x + 1)
162 |                        });
    |

error: called `map(f).unwrap_or_else(g)` on a Result value. This can be done more directly by calling `ok().map_or_else(g, f)` instead
   --> $DIR/methods.rs:173:13
    |
173 |       let _ = res.map(|x| x + 1)
    |  _____________^
174 | |
175 | |                .unwrap_or_else(|e| 0); // should lint even though this call is on a separate line
    | |_____________________________________^
    |
    = note: `-D clippy::result-map-unwrap-or-else` implied by `-D warnings`
    = note: replace `map(|x| x + 1).unwrap_or_else(|e| 0)` with `ok().map_or_else(|e| 0, |x| x + 1)`

error: called `map(f).unwrap_or_else(g)` on a Result value. This can be done more directly by calling `ok().map_or_else(g, f)` instead
   --> $DIR/methods.rs:177:13
    |
177 |       let _ = res.map(|x| {
    |  _____________^
178 | |                         x + 1
179 | |                     }
180 | |               ).unwrap_or_else(|e| 0);
    | |_____________________________________^

error: called `map(f).unwrap_or_else(g)` on a Result value. This can be done more directly by calling `ok().map_or_else(g, f)` instead
   --> $DIR/methods.rs:181:13
    |
181 |       let _ = res.map(|x| x + 1)
    |  _____________^
182 | |                .unwrap_or_else(|e|
183 | |                     0
184 | |                 );
    | |_________________^

error: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
   --> $DIR/methods.rs:244:13
    |
244 |     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:247:13
    |
247 |       let _ = v.iter().filter(|&x| {
    |  _____________^
248 | |                                 *x < 0
249 | |                             }
250 | |                    ).next();
    | |___________________________^

error: called `is_some()` after searching an `Iterator` with find. This is more succinctly expressed by calling `any()`.
   --> $DIR/methods.rs:262:13
    |
262 |     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:265:13
    |
265 |       let _ = v.iter().find(|&x| {
    |  _____________^
266 | |                               *x < 0
267 | |                           }
268 | |                    ).is_some();
    | |______________________________^

error: called `is_some()` after searching an `Iterator` with position. This is more succinctly expressed by calling `any()`.
   --> $DIR/methods.rs:271:13
    |
271 |     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:274:13
    |
274 |       let _ = v.iter().position(|&x| {
    |  _____________^
275 | |                                   x < 0
276 | |                               }
277 | |                    ).is_some();
    | |______________________________^

error: called `is_some()` after searching an `Iterator` with rposition. This is more succinctly expressed by calling `any()`.
   --> $DIR/methods.rs:280:13
    |
280 |     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:283:13
    |
283 |       let _ = v.iter().rposition(|&x| {
    |  _____________^
284 | |                                    x < 0
285 | |                                }
286 | |                    ).is_some();
    | |______________________________^

error: use of `unwrap_or` followed by a function call
   --> $DIR/methods.rs:318:22
    |
318 |     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:321:5
    |
321 |     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:324:21
    |
324 |     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:327:14
    |
327 |     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:330:19
    |
330 |     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:333:5
    |
333 |     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:336:5
    |
336 |     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:339:14
    |
339 |     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:344:21
    |
344 |     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:347:19
    |
347 |     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:350:21
    |
350 |     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:353:21
    |
353 |     let _ = stringy.unwrap_or("".to_owned());
    |                     ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "".to_owned())`

error: `error_code` is shadowed by `123_i32`
   --> $DIR/methods.rs:387:9
    |
387 |     let error_code = 123_i32;
    |         ^^^^^^^^^^
    |
    = note: `-D clippy::shadow-unrelated` implied by `-D warnings`
note: initialization happens here
   --> $DIR/methods.rs:387:22
    |
387 |     let error_code = 123_i32;
    |                      ^^^^^^^
note: previous binding is here
   --> $DIR/methods.rs:374:9
    |
374 |     let error_code = 123_i32;
    |         ^^^^^^^^^^

error: use of `expect` followed by a function call
   --> $DIR/methods.rs:376:26
    |
376 |     with_none_and_format.expect(&format!("Error {}: fake error", error_code));
    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| panic!("Error {}: fake error", error_code))`
    |
    = note: `-D clippy::expect-fun-call` implied by `-D warnings`

error: use of `expect` followed by a function call
   --> $DIR/methods.rs:379:26
    |
379 |     with_none_and_as_str.expect(format!("Error {}: fake error", error_code).as_str());
    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| panic!("Error {}: fake error", error_code))`

error: use of `expect` followed by a function call
   --> $DIR/methods.rs:389:25
    |
389 |     with_err_and_format.expect(&format!("Error {}: fake error", error_code));
    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| panic!("Error {}: fake error", error_code))`

error: use of `expect` followed by a function call
   --> $DIR/methods.rs:392:25
    |
392 |     with_err_and_as_str.expect(format!("Error {}: fake error", error_code).as_str());
    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| panic!("Error {}: fake error", error_code))`

error: use of `expect` followed by a function call
   --> $DIR/methods.rs:407:17
    |
407 |     Some("foo").expect({ &format!("error") });
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| { let msg = { &format!("error") }; panic!(msg) }))`

error: use of `expect` followed by a function call
   --> $DIR/methods.rs:408:17
    |
408 |     Some("foo").expect(format!("error").as_ref());
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| panic!("error"))`

error: called `.iter().nth()` on a Vec. Calling `.get()` is both faster and more readable
   --> $DIR/methods.rs:419:23
    |
419 |         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:420:26
    |
420 |         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:421:31
    |
421 |         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:422:29
    |
422 |         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:427:23
    |
427 |         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:430:26
    |
430 |         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:433:29
    |
433 |         let bad_vec_deque = some_vec_deque.iter_mut().nth(3);
    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
   --> $DIR/methods.rs:445:13
    |
445 |     let _ = some_vec.iter().skip(42).next();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: `-D clippy::iter-skip-next` implied by `-D warnings`

error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
   --> $DIR/methods.rs:446:13
    |
446 |     let _ = some_vec.iter().cycle().skip(42).next();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
   --> $DIR/methods.rs:447:13
    |
447 |     let _ = (1..10).skip(10).next();
    |             ^^^^^^^^^^^^^^^^^^^^^^^

error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
   --> $DIR/methods.rs:448:14
    |
448 |     let _ = &some_vec[..].iter().skip(3).next();
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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:457:13
    |
457 |     let _ = opt.unwrap();
    |             ^^^^^^^^^^^^
    |
    = note: `-D clippy::option-unwrap-used` implied by `-D warnings`

error: aborting due to 57 previous errors