rust/tests/ui/methods.stderr
2018-06-14 23:13:12 +01:00

531 lines
21 KiB
Text

error: unnecessary structure name repetition
--> $DIR/methods.rs:21:29
|
21 | pub fn add(self, other: T) -> T { self }
| ^ help: use the applicable keyword: `Self`
|
= note: `-D use-self` implied by `-D warnings`
error: unnecessary structure name repetition
--> $DIR/methods.rs:21:35
|
21 | pub fn add(self, other: T) -> T { self }
| ^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
--> $DIR/methods.rs:25:25
|
25 | fn eq(&self, other: T) -> bool { true } // no error, private function
| ^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
--> $DIR/methods.rs:27:26
|
27 | fn sub(&self, other: T) -> &T { self } // no error, self is a ref
| ^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
--> $DIR/methods.rs:27:33
|
27 | fn sub(&self, other: T) -> &T { self } // no error, self is a ref
| ^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
--> $DIR/methods.rs:28:21
|
28 | fn div(self) -> T { self } // no error, different #arguments
| ^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
--> $DIR/methods.rs:29:25
|
29 | fn rem(self, other: T) { } // no error, wrong return type
| ^ help: use the applicable keyword: `Self`
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:21:5
|
21 | pub fn add(self, other: T) -> T { self }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D 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:32:17
|
32 | fn into_u16(&self) -> u16 { 0 }
| ^^^^^
|
= note: `-D 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:34:21
|
34 | fn to_something(self) -> u32 { 0 }
| ^^^^
error: methods called `new` usually take no self; consider choosing a less ambiguous name
--> $DIR/methods.rs:36:12
|
36 | fn new(self) {}
| ^^^^
error: methods called `new` usually return `Self`
--> $DIR/methods.rs:36:5
|
36 | fn new(self) {}
| ^^^^^^^^^^^^^^^
|
= note: `-D new-ret-no-self` implied by `-D warnings`
error: unnecessary structure name repetition
--> $DIR/methods.rs:80:24
|
80 | fn new() -> Option<V<T>> { None }
| ^^^^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
--> $DIR/methods.rs:84:19
|
84 | type Output = T;
| ^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
--> $DIR/methods.rs:85:25
|
85 | fn mul(self, other: T) -> T { self } // no error, obviously
| ^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
--> $DIR/methods.rs:85:31
|
85 | fn mul(self, other: T) -> T { self } // no error, obviously
| ^ help: use the applicable keyword: `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:104:13
|
104 | let _ = opt.map(|x| x + 1)
| _____________^
105 | |
106 | | .unwrap_or(0); // should lint even though this call is on a separate line
| |____________________________^
|
= note: `-D 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:108:13
|
108 | let _ = opt.map(|x| {
| _____________^
109 | | x + 1
110 | | }
111 | | ).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:112:13
|
112 | let _ = opt.map(|x| x + 1)
| _____________^
113 | | .unwrap_or({
114 | | 0
115 | | });
| |__________________^
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:117:13
|
117 | 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:119:13
|
119 | let _ = opt.map(|x| {
| _____________^
120 | | Some(x + 1)
121 | | }
122 | | ).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:123:13
|
123 | let _ = opt
| _____________^
124 | | .map(|x| Some(x + 1))
125 | | .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:131:13
|
131 | let _ = opt.map(|x| x + 1)
| _____________^
132 | |
133 | | .unwrap_or_else(|| 0); // should lint even though this call is on a separate line
| |____________________________________^
|
= note: `-D 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:135:13
|
135 | let _ = opt.map(|x| {
| _____________^
136 | | x + 1
137 | | }
138 | | ).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:139:13
|
139 | let _ = opt.map(|x| x + 1)
| _____________^
140 | | .unwrap_or_else(||
141 | | 0
142 | | );
| |_________________^
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:148:13
|
148 | let _ = opt.map_or(None, |x| Some(x + 1));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using and_then instead: `opt.and_then(|x| Some(x + 1))`
|
= note: `-D 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:150:13
|
150 | let _ = opt.map_or(None, |x| {
| _____________^
151 | | Some(x + 1)
152 | | }
153 | | );
| |_________________^
help: try using and_then instead
|
150 | let _ = opt.and_then(|x| {
151 | Some(x + 1)
152 | });
|
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:163:13
|
163 | let _ = res.map(|x| x + 1)
| _____________^
164 | |
165 | | .unwrap_or_else(|e| 0); // should lint even though this call is on a separate line
| |_____________________________________^
|
= note: `-D 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:167:13
|
167 | let _ = res.map(|x| {
| _____________^
168 | | x + 1
169 | | }
170 | | ).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:171:13
|
171 | let _ = res.map(|x| x + 1)
| _____________^
172 | | .unwrap_or_else(|e|
173 | | 0
174 | | );
| |_________________^
error: unnecessary structure name repetition
--> $DIR/methods.rs:200:24
|
200 | fn filter(self) -> IteratorFalsePositives {
| ^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
--> $DIR/methods.rs:204:22
|
204 | fn next(self) -> IteratorFalsePositives {
| ^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
--> $DIR/methods.rs:224:32
|
224 | fn skip(self, _: usize) -> IteratorFalsePositives {
| ^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
error: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
--> $DIR/methods.rs:234:13
|
234 | let _ = v.iter().filter(|&x| *x < 0).next();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D 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:237:13
|
237 | let _ = v.iter().filter(|&x| {
| _____________^
238 | | *x < 0
239 | | }
240 | | ).next();
| |___________________________^
error: called `is_some()` after searching an `Iterator` with find. This is more succinctly expressed by calling `any()`.
--> $DIR/methods.rs:252:13
|
252 | let _ = v.iter().find(|&x| *x < 0).is_some();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D 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:255:13
|
255 | let _ = v.iter().find(|&x| {
| _____________^
256 | | *x < 0
257 | | }
258 | | ).is_some();
| |______________________________^
error: called `is_some()` after searching an `Iterator` with position. This is more succinctly expressed by calling `any()`.
--> $DIR/methods.rs:261:13
|
261 | 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:264:13
|
264 | let _ = v.iter().position(|&x| {
| _____________^
265 | | x < 0
266 | | }
267 | | ).is_some();
| |______________________________^
error: called `is_some()` after searching an `Iterator` with rposition. This is more succinctly expressed by calling `any()`.
--> $DIR/methods.rs:270:13
|
270 | 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:273:13
|
273 | let _ = v.iter().rposition(|&x| {
| _____________^
274 | | x < 0
275 | | }
276 | | ).is_some();
| |______________________________^
error: unnecessary structure name repetition
--> $DIR/methods.rs:290:21
|
290 | fn new() -> Foo { Foo }
| ^^^ help: use the applicable keyword: `Self`
error: use of `unwrap_or` followed by a function call
--> $DIR/methods.rs:308:22
|
308 | with_constructor.unwrap_or(make());
| ^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(make)`
|
= note: `-D or-fun-call` implied by `-D warnings`
error: use of `unwrap_or` followed by a call to `new`
--> $DIR/methods.rs:311:5
|
311 | 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:314:21
|
314 | 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:317:14
|
317 | 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:320:19
|
320 | 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:323:5
|
323 | 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:326:5
|
326 | 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:329:14
|
329 | with_vec.unwrap_or(vec![]);
| ^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| < [ _ ] > :: into_vec ( box [ $ ( $ x ) , * ] ))`
error: use of `unwrap_or` followed by a function call
--> $DIR/methods.rs:334:21
|
334 | 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:337:19
|
337 | 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:340:21
|
340 | 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:343:21
|
343 | let _ = stringy.unwrap_or("".to_owned());
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "".to_owned())`
error: use of `expect` followed by a function call
--> $DIR/methods.rs:366:26
|
366 | 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 expect-fun-call` implied by `-D warnings`
error: use of `expect` followed by a function call
--> $DIR/methods.rs:369:26
|
369 | with_none_and_as_str.expect(format!("Error {}: fake error", error_code).as_str());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| panic!(format!("Error {}: fake error", error_code).as_str()))`
error: use of `expect` followed by a function call
--> $DIR/methods.rs:379:25
|
379 | 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:382:25
|
382 | with_err_and_as_str.expect(format!("Error {}: fake error", error_code).as_str());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| panic!(format!("Error {}: fake error", error_code).as_str()))`
error: called `.iter().nth()` on a Vec. Calling `.get()` is both faster and more readable
--> $DIR/methods.rs:402:23
|
402 | let bad_vec = some_vec.iter().nth(3);
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D iter-nth` implied by `-D warnings`
error: called `.iter().nth()` on a slice. Calling `.get()` is both faster and more readable
--> $DIR/methods.rs:403:26
|
403 | 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:404:31
|
404 | 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:405:29
|
405 | 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:410:23
|
410 | 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:413:26
|
413 | 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:416:29
|
416 | 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:428:13
|
428 | let _ = some_vec.iter().skip(42).next();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D 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:429:13
|
429 | 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:430:13
|
430 | 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:431:14
|
431 | 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:440:13
|
440 | let _ = opt.unwrap();
| ^^^^^^^^^^^^
|
= note: `-D option-unwrap-used` implied by `-D warnings`
error: aborting due to 70 previous errors