Add a suggestion to replace `map(f).unwrap_or(None)` with `and_then(f)`.
fn lint_map_unwrap_or(cx: &LateContext, expr: &hir::Expr, map_args: &[hir::Expr], unwrap_args: &[hir::Expr]) {
// lint if the caller of `map()` is an `Option`
if match_type(cx, cx.tables.expr_ty(&map_args[0]), &paths::OPTION) {
fn lint_map_unwrap_or(cx: &LateContext, expr: &hir::Expr, map_args: &[hir::Expr], unwrap_args: &[hir::Expr]) {
// lint if the caller of `map()` is an `Option`
if match_type(cx, cx.tables.expr_ty(&map_args[0]), &paths::OPTION) {
- // lint message
- let msg = "called `map(f).unwrap_or(a)` on an Option value. This can be done more directly by calling \
- `map_or(a, f)` instead";
// get snippets for args to map() and unwrap_or()
let map_snippet = snippet(cx, map_args[1].span, "..");
let unwrap_snippet = snippet(cx, unwrap_args[1].span, "..");
// get snippets for args to map() and unwrap_or()
let map_snippet = snippet(cx, map_args[1].span, "..");
let unwrap_snippet = snippet(cx, unwrap_args[1].span, "..");
+ // lint message
+ let arg = if unwrap_snippet == "None" { "None" } else { "a" };
+ let suggest = if unwrap_snippet == "None" { "and_then(f)" } else { "map_or(a, f)" };
+ let msg = &format!(
+ "called `map(f).unwrap_or({})` on an Option value. \
+ This can be done more directly by calling `{}` instead",
+ arg,
+ suggest
+ );
// lint, with note if neither arg is > 1 line and both map() and
// unwrap_or() have the same span
let multiline = map_snippet.lines().count() > 1 || unwrap_snippet.lines().count() > 1;
let same_span = map_args[1].span.ctxt() == unwrap_args[1].span.ctxt();
if same_span && !multiline {
// lint, with note if neither arg is > 1 line and both map() and
// unwrap_or() have the same span
let multiline = map_snippet.lines().count() > 1 || unwrap_snippet.lines().count() > 1;
let same_span = map_args[1].span.ctxt() == unwrap_args[1].span.ctxt();
if same_span && !multiline {
- span_note_and_lint(
- cx,
- OPTION_MAP_UNWRAP_OR,
- expr.span,
- msg,
- expr.span,
- &format!(
- "replace `map({0}).unwrap_or({1})` with `map_or({1}, {0})`",
- map_snippet,
- unwrap_snippet
- ),
+ let suggest = if unwrap_snippet == "None" {
+ format!("and_then({})", map_snippet)
+ } else {
+ format!("map_or({}, {})", unwrap_snippet, map_snippet)
+ };
+ let note = format!(
+ "replace `map({}).unwrap_or({})` with `{}`",
+ map_snippet,
+ unwrap_snippet,
+ suggest
+ span_note_and_lint(cx, OPTION_MAP_UNWRAP_OR, expr.span, msg, expr.span, ¬e);
} else if same_span && multiline {
span_lint(cx, OPTION_MAP_UNWRAP_OR, expr.span, msg);
};
} else if same_span && multiline {
span_lint(cx, OPTION_MAP_UNWRAP_OR, expr.span, msg);
};
+ // map(f).unwrap_or(None) case
+ let _ = opt.map(|x| Some(x + 1)).unwrap_or(None);
// macro case
let _ = opt_map!(opt, |x| x + 1).unwrap_or(0); // should not lint
// macro case
let _ = opt_map!(opt, |x| x + 1).unwrap_or(0); // should not lint
110 | | });
| |__________________^
110 | | });
| |__________________^
+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:112:13
+ |
+112 | 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_else(g)` on an Option value. This can be done more directly by calling `map_or_else(g, f)` instead
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:116:13
+ --> $DIR/methods.rs:118:13
-116 | let _ = opt.map(|x| x + 1)
+118 | let _ = opt.map(|x| x + 1)
-117 | |
-118 | | .unwrap_or_else(|| 0); // should lint even though this call is on a separate line
+119 | |
+120 | | .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
| |____________________________________^
|
= 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:120:13
+ --> $DIR/methods.rs:122:13
-120 | let _ = opt.map(|x| {
+122 | let _ = opt.map(|x| {
-121 | | x + 1
-122 | | }
-123 | | ).unwrap_or_else(|| 0);
+123 | | x + 1
+124 | | }
+125 | | ).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
| |____________________________________^
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:124:13
+ --> $DIR/methods.rs:126:13
-124 | let _ = opt.map(|x| x + 1)
+126 | let _ = opt.map(|x| x + 1)
-125 | | .unwrap_or_else(||
-126 | | 0
-127 | | );
+127 | | .unwrap_or_else(||
+128 | | 0
+129 | | );
| |_________________^
error: unnecessary structure name repetition
| |_________________^
error: unnecessary structure name repetition
- --> $DIR/methods.rs:153:24
+ --> $DIR/methods.rs:155:24
-153 | fn filter(self) -> IteratorFalsePositives {
+155 | fn filter(self) -> IteratorFalsePositives {
| ^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
| ^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
- --> $DIR/methods.rs:157:22
+ --> $DIR/methods.rs:159:22
-157 | fn next(self) -> IteratorFalsePositives {
+159 | fn next(self) -> IteratorFalsePositives {
| ^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
| ^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
error: unnecessary structure name repetition
- --> $DIR/methods.rs:177:32
+ --> $DIR/methods.rs:179:32
-177 | fn skip(self, _: usize) -> IteratorFalsePositives {
+179 | 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.
| ^^^^^^^^^^^^^^^^^^^^^^ 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:196:13
+ --> $DIR/methods.rs:198:13
-196 | let _ = v.iter().filter(|&x| *x < 0).next();
+198 | 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.
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= 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:199:13
+ --> $DIR/methods.rs:201:13
-199 | let _ = v.iter().filter(|&x| {
+201 | let _ = v.iter().filter(|&x| {
-200 | | *x < 0
-201 | | }
-202 | | ).next();
+202 | | *x < 0
+203 | | }
+204 | | ).next();
| |___________________________^
error: called `is_some()` after searching an `Iterator` with find. This is more succinctly expressed by calling `any()`.
| |___________________________^
error: called `is_some()` after searching an `Iterator` with find. This is more succinctly expressed by calling `any()`.
- --> $DIR/methods.rs:214:13
+ --> $DIR/methods.rs:216:13
-214 | let _ = v.iter().find(|&x| *x < 0).is_some();
+216 | 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()`.
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= 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:217:13
+ --> $DIR/methods.rs:219:13
-217 | let _ = v.iter().find(|&x| {
+219 | let _ = v.iter().find(|&x| {
-218 | | *x < 0
-219 | | }
-220 | | ).is_some();
+220 | | *x < 0
+221 | | }
+222 | | ).is_some();
| |______________________________^
error: called `is_some()` after searching an `Iterator` with position. This is more succinctly expressed by calling `any()`.
| |______________________________^
error: called `is_some()` after searching an `Iterator` with position. This is more succinctly expressed by calling `any()`.
- --> $DIR/methods.rs:223:13
+ --> $DIR/methods.rs:225:13
-223 | let _ = v.iter().position(|&x| x < 0).is_some();
+225 | 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()`.
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= 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:226:13
+ --> $DIR/methods.rs:228:13
-226 | let _ = v.iter().position(|&x| {
+228 | let _ = v.iter().position(|&x| {
-227 | | x < 0
-228 | | }
-229 | | ).is_some();
+229 | | x < 0
+230 | | }
+231 | | ).is_some();
| |______________________________^
error: called `is_some()` after searching an `Iterator` with rposition. This is more succinctly expressed by calling `any()`.
| |______________________________^
error: called `is_some()` after searching an `Iterator` with rposition. This is more succinctly expressed by calling `any()`.
- --> $DIR/methods.rs:232:13
+ --> $DIR/methods.rs:234:13
-232 | let _ = v.iter().rposition(|&x| x < 0).is_some();
+234 | 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()`.
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= 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:235:13
+ --> $DIR/methods.rs:237:13
-235 | let _ = v.iter().rposition(|&x| {
+237 | let _ = v.iter().rposition(|&x| {
-236 | | x < 0
-237 | | }
-238 | | ).is_some();
+238 | | x < 0
+239 | | }
+240 | | ).is_some();
| |______________________________^
error: unnecessary structure name repetition
| |______________________________^
error: unnecessary structure name repetition
- --> $DIR/methods.rs:252:21
+ --> $DIR/methods.rs:254:21
-252 | fn new() -> Foo { Foo }
+254 | fn new() -> Foo { Foo }
| ^^^ help: use the applicable keyword: `Self`
error: use of `unwrap_or` followed by a function call
| ^^^ help: use the applicable keyword: `Self`
error: use of `unwrap_or` followed by a function call
- --> $DIR/methods.rs:270:5
+ --> $DIR/methods.rs:272:5
-270 | with_constructor.unwrap_or(make());
+272 | with_constructor.unwrap_or(make());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_constructor.unwrap_or_else(make)`
|
= note: `-D or-fun-call` implied by `-D warnings`
error: use of `unwrap_or` followed by a call to `new`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_constructor.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:273:5
+ --> $DIR/methods.rs:275:5
-273 | with_new.unwrap_or(Vec::new());
+275 | with_new.unwrap_or(Vec::new());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_new.unwrap_or_default()`
error: use of `unwrap_or` followed by a function call
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_new.unwrap_or_default()`
error: use of `unwrap_or` followed by a function call
- --> $DIR/methods.rs:276:5
+ --> $DIR/methods.rs:278:5
-276 | with_const_args.unwrap_or(Vec::with_capacity(12));
+278 | with_const_args.unwrap_or(Vec::with_capacity(12));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_const_args.unwrap_or_else(|| Vec::with_capacity(12))`
error: use of `unwrap_or` followed by a function call
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_const_args.unwrap_or_else(|| Vec::with_capacity(12))`
error: use of `unwrap_or` followed by a function call
- --> $DIR/methods.rs:279:5
+ --> $DIR/methods.rs:281:5
-279 | with_err.unwrap_or(make());
+281 | with_err.unwrap_or(make());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_err.unwrap_or_else(|_| make())`
error: use of `unwrap_or` followed by a function call
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_err.unwrap_or_else(|_| make())`
error: use of `unwrap_or` followed by a function call
- --> $DIR/methods.rs:282:5
+ --> $DIR/methods.rs:284:5
-282 | with_err_args.unwrap_or(Vec::with_capacity(12));
+284 | with_err_args.unwrap_or(Vec::with_capacity(12));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_err_args.unwrap_or_else(|_| Vec::with_capacity(12))`
error: use of `unwrap_or` followed by a call to `default`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_err_args.unwrap_or_else(|_| Vec::with_capacity(12))`
error: use of `unwrap_or` followed by a call to `default`
- --> $DIR/methods.rs:285:5
+ --> $DIR/methods.rs:287:5
-285 | with_default_trait.unwrap_or(Default::default());
+287 | 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`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_default_trait.unwrap_or_default()`
error: use of `unwrap_or` followed by a call to `default`
- --> $DIR/methods.rs:288:5
+ --> $DIR/methods.rs:290:5
-288 | with_default_type.unwrap_or(u64::default());
+290 | 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
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_default_type.unwrap_or_default()`
error: use of `unwrap_or` followed by a function call
- --> $DIR/methods.rs:291:5
+ --> $DIR/methods.rs:293:5
-291 | with_vec.unwrap_or(vec![]);
+293 | with_vec.unwrap_or(vec![]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_vec.unwrap_or_else(|| < [ _ ] > :: into_vec ( box [ $ ( $ x ) , * ] ))`
error: use of `unwrap_or` followed by a function call
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_vec.unwrap_or_else(|| < [ _ ] > :: into_vec ( box [ $ ( $ x ) , * ] ))`
error: use of `unwrap_or` followed by a function call
- --> $DIR/methods.rs:296:5
+ --> $DIR/methods.rs:298:5
-296 | without_default.unwrap_or(Foo::new());
+298 | without_default.unwrap_or(Foo::new());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `without_default.unwrap_or_else(Foo::new)`
error: use of `or_insert` followed by a function call
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `without_default.unwrap_or_else(Foo::new)`
error: use of `or_insert` followed by a function call
- --> $DIR/methods.rs:299:5
+ --> $DIR/methods.rs:301:5
-299 | map.entry(42).or_insert(String::new());
+301 | map.entry(42).or_insert(String::new());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `map.entry(42).or_insert_with(String::new)`
error: use of `or_insert` followed by a function call
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `map.entry(42).or_insert_with(String::new)`
error: use of `or_insert` followed by a function call
- --> $DIR/methods.rs:302:5
+ --> $DIR/methods.rs:304:5
-302 | btree.entry(42).or_insert(String::new());
+304 | btree.entry(42).or_insert(String::new());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `btree.entry(42).or_insert_with(String::new)`
error: use of `unwrap_or` followed by a function call
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `btree.entry(42).or_insert_with(String::new)`
error: use of `unwrap_or` followed by a function call
- --> $DIR/methods.rs:305:13
+ --> $DIR/methods.rs:307:13
-305 | let _ = stringy.unwrap_or("".to_owned());
+307 | let _ = stringy.unwrap_or("".to_owned());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `stringy.unwrap_or_else(|| "".to_owned())`
error: called `.iter().nth()` on a Vec. Calling `.get()` is both faster and more readable
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `stringy.unwrap_or_else(|| "".to_owned())`
error: called `.iter().nth()` on a Vec. Calling `.get()` is both faster and more readable
- --> $DIR/methods.rs:316:23
+ --> $DIR/methods.rs:318:23
-316 | let bad_vec = some_vec.iter().nth(3);
+318 | 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
| ^^^^^^^^^^^^^^^^^^^^^^
|
= 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:317:26
+ --> $DIR/methods.rs:319:26
-317 | let bad_slice = &some_vec[..].iter().nth(3);
+319 | let bad_slice = &some_vec[..].iter().nth(3);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `.iter().nth()` on a slice. Calling `.get()` is both faster and more readable
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `.iter().nth()` on a slice. Calling `.get()` is both faster and more readable
- --> $DIR/methods.rs:318:31
+ --> $DIR/methods.rs:320:31
-318 | let bad_boxed_slice = boxed_slice.iter().nth(3);
+320 | let bad_boxed_slice = boxed_slice.iter().nth(3);
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `.iter().nth()` on a VecDeque. Calling `.get()` is both faster and more readable
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `.iter().nth()` on a VecDeque. Calling `.get()` is both faster and more readable
- --> $DIR/methods.rs:319:29
+ --> $DIR/methods.rs:321:29
-319 | let bad_vec_deque = some_vec_deque.iter().nth(3);
+321 | 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
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `.iter_mut().nth()` on a Vec. Calling `.get_mut()` is both faster and more readable
- --> $DIR/methods.rs:324:23
+ --> $DIR/methods.rs:326:23
-324 | let bad_vec = some_vec.iter_mut().nth(3);
+326 | 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
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `.iter_mut().nth()` on a slice. Calling `.get_mut()` is both faster and more readable
- --> $DIR/methods.rs:327:26
+ --> $DIR/methods.rs:329:26
-327 | let bad_slice = &some_vec[..].iter_mut().nth(3);
+329 | 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
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `.iter_mut().nth()` on a VecDeque. Calling `.get_mut()` is both faster and more readable
- --> $DIR/methods.rs:330:29
+ --> $DIR/methods.rs:332:29
-330 | let bad_vec_deque = some_vec_deque.iter_mut().nth(3);
+332 | 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)`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
- --> $DIR/methods.rs:342:13
+ --> $DIR/methods.rs:344:13
-342 | let _ = some_vec.iter().skip(42).next();
+344 | 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)`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= 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:343:13
+ --> $DIR/methods.rs:345:13
-343 | let _ = some_vec.iter().cycle().skip(42).next();
+345 | 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)`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
- --> $DIR/methods.rs:344:13
+ --> $DIR/methods.rs:346:13
-344 | let _ = (1..10).skip(10).next();
+346 | let _ = (1..10).skip(10).next();
| ^^^^^^^^^^^^^^^^^^^^^^^
error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
| ^^^^^^^^^^^^^^^^^^^^^^^
error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
- --> $DIR/methods.rs:345:14
+ --> $DIR/methods.rs:347:14
-345 | let _ = &some_vec[..].iter().skip(3).next();
+347 | let _ = &some_vec[..].iter().skip(3).next();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
- --> $DIR/methods.rs:371:17
+ --> $DIR/methods.rs:373:17
-371 | let _ = boxed_slice.get(1).unwrap();
+373 | let _ = boxed_slice.get(1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&boxed_slice[1]`
|
= note: `-D get-unwrap` implied by `-D warnings`
error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&boxed_slice[1]`
|
= note: `-D get-unwrap` implied by `-D warnings`
error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
- --> $DIR/methods.rs:372:17
+ --> $DIR/methods.rs:374:17
-372 | let _ = some_slice.get(0).unwrap();
+374 | let _ = some_slice.get(0).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_slice[0]`
error: called `.get().unwrap()` on a Vec. Using `[]` is more clear and more concise
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_slice[0]`
error: called `.get().unwrap()` on a Vec. Using `[]` is more clear and more concise
- --> $DIR/methods.rs:373:17
+ --> $DIR/methods.rs:375:17
-373 | let _ = some_vec.get(0).unwrap();
+375 | let _ = some_vec.get(0).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_vec[0]`
error: called `.get().unwrap()` on a VecDeque. Using `[]` is more clear and more concise
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_vec[0]`
error: called `.get().unwrap()` on a VecDeque. Using `[]` is more clear and more concise
- --> $DIR/methods.rs:374:17
+ --> $DIR/methods.rs:376:17
-374 | let _ = some_vecdeque.get(0).unwrap();
+376 | let _ = some_vecdeque.get(0).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_vecdeque[0]`
error: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_vecdeque[0]`
error: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
- --> $DIR/methods.rs:375:17
+ --> $DIR/methods.rs:377:17
-375 | let _ = some_hashmap.get(&1).unwrap();
+377 | let _ = some_hashmap.get(&1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_hashmap[&1]`
error: called `.get().unwrap()` on a BTreeMap. Using `[]` is more clear and more concise
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_hashmap[&1]`
error: called `.get().unwrap()` on a BTreeMap. Using `[]` is more clear and more concise
- --> $DIR/methods.rs:376:17
+ --> $DIR/methods.rs:378:17
-376 | let _ = some_btreemap.get(&1).unwrap();
+378 | let _ = some_btreemap.get(&1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_btreemap[&1]`
error: called `.get_mut().unwrap()` on a slice. Using `[]` is more clear and more concise
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_btreemap[&1]`
error: called `.get_mut().unwrap()` on a slice. Using `[]` is more clear and more concise
- --> $DIR/methods.rs:381:10
+ --> $DIR/methods.rs:383:10
-381 | *boxed_slice.get_mut(0).unwrap() = 1;
+383 | *boxed_slice.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut boxed_slice[0]`
error: called `.get_mut().unwrap()` on a slice. Using `[]` is more clear and more concise
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut boxed_slice[0]`
error: called `.get_mut().unwrap()` on a slice. Using `[]` is more clear and more concise
- --> $DIR/methods.rs:382:10
+ --> $DIR/methods.rs:384:10
-382 | *some_slice.get_mut(0).unwrap() = 1;
+384 | *some_slice.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut some_slice[0]`
error: called `.get_mut().unwrap()` on a Vec. Using `[]` is more clear and more concise
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut some_slice[0]`
error: called `.get_mut().unwrap()` on a Vec. Using `[]` is more clear and more concise
- --> $DIR/methods.rs:383:10
+ --> $DIR/methods.rs:385:10
-383 | *some_vec.get_mut(0).unwrap() = 1;
+385 | *some_vec.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut some_vec[0]`
error: called `.get_mut().unwrap()` on a VecDeque. Using `[]` is more clear and more concise
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut some_vec[0]`
error: called `.get_mut().unwrap()` on a VecDeque. Using `[]` is more clear and more concise
- --> $DIR/methods.rs:384:10
+ --> $DIR/methods.rs:386:10
-384 | *some_vecdeque.get_mut(0).unwrap() = 1;
+386 | *some_vecdeque.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut some_vecdeque[0]`
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
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut some_vecdeque[0]`
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:398:13
+ --> $DIR/methods.rs:400:13
-398 | let _ = opt.unwrap();
+400 | let _ = opt.unwrap();
| ^^^^^^^^^^^^
|
= note: `-D option-unwrap-used` implied by `-D warnings`
error: used unwrap() on a Result value. If you don't want to handle the Err case gracefully, consider using expect() to provide a better panic message
| ^^^^^^^^^^^^
|
= note: `-D option-unwrap-used` implied by `-D warnings`
error: used unwrap() on a Result value. If you don't want to handle the Err case gracefully, consider using expect() to provide a better panic message
- --> $DIR/methods.rs:401:13
+ --> $DIR/methods.rs:403:13
-401 | let _ = res.unwrap();
+403 | let _ = res.unwrap();
| ^^^^^^^^^^^^
|
= note: `-D result-unwrap-used` implied by `-D warnings`
error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
| ^^^^^^^^^^^^
|
= note: `-D result-unwrap-used` implied by `-D warnings`
error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
- --> $DIR/methods.rs:403:5
+ --> $DIR/methods.rs:405:5
-403 | res.ok().expect("disaster!");
+405 | res.ok().expect("disaster!");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D ok-expect` implied by `-D warnings`
error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D ok-expect` implied by `-D warnings`
error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
- --> $DIR/methods.rs:409:5
+ --> $DIR/methods.rs:411:5
-409 | res3.ok().expect("whoof");
+411 | res3.ok().expect("whoof");
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
- --> $DIR/methods.rs:411:5
+ --> $DIR/methods.rs:413:5
-411 | res4.ok().expect("argh");
+413 | res4.ok().expect("argh");
| ^^^^^^^^^^^^^^^^^^^^^^^^
error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
| ^^^^^^^^^^^^^^^^^^^^^^^^
error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
- --> $DIR/methods.rs:413:5
+ --> $DIR/methods.rs:415:5
-413 | res5.ok().expect("oops");
+415 | res5.ok().expect("oops");
| ^^^^^^^^^^^^^^^^^^^^^^^^
error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
| ^^^^^^^^^^^^^^^^^^^^^^^^
error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
- --> $DIR/methods.rs:415:5
+ --> $DIR/methods.rs:417:5
-415 | res6.ok().expect("meh");
+417 | res6.ok().expect("meh");
| ^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `starts_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `starts_with` method
- --> $DIR/methods.rs:427:5
+ --> $DIR/methods.rs:429:5
-427 | "".chars().next() == Some(' ');
+429 | "".chars().next() == Some(' ');
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `"".starts_with(' ')`
|
= note: `-D chars-next-cmp` implied by `-D warnings`
error: you should use the `starts_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `"".starts_with(' ')`
|
= note: `-D chars-next-cmp` implied by `-D warnings`
error: you should use the `starts_with` method
- --> $DIR/methods.rs:428:5
+ --> $DIR/methods.rs:430:5
-428 | Some(' ') != "".chars().next();
+430 | Some(' ') != "".chars().next();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!"".starts_with(' ')`
error: calling `.extend(_.chars())`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!"".starts_with(' ')`
error: calling `.extend(_.chars())`
- --> $DIR/methods.rs:437:5
+ --> $DIR/methods.rs:439:5
-437 | s.extend(abc.chars());
+439 | s.extend(abc.chars());
| ^^^^^^^^^^^^^^^^^^^^^ help: try this: `s.push_str(abc)`
|
= note: `-D string-extend-chars` implied by `-D warnings`
error: calling `.extend(_.chars())`
| ^^^^^^^^^^^^^^^^^^^^^ help: try this: `s.push_str(abc)`
|
= note: `-D string-extend-chars` implied by `-D warnings`
error: calling `.extend(_.chars())`
- --> $DIR/methods.rs:440:5
+ --> $DIR/methods.rs:442:5
-440 | s.extend("abc".chars());
+442 | s.extend("abc".chars());
| ^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `s.push_str("abc")`
error: calling `.extend(_.chars())`
| ^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `s.push_str("abc")`
error: calling `.extend(_.chars())`
- --> $DIR/methods.rs:443:5
+ --> $DIR/methods.rs:445:5
-443 | s.extend(def.chars());
+445 | s.extend(def.chars());
| ^^^^^^^^^^^^^^^^^^^^^ help: try this: `s.push_str(&def)`
error: using `clone` on a `Copy` type
| ^^^^^^^^^^^^^^^^^^^^^ help: try this: `s.push_str(&def)`
error: using `clone` on a `Copy` type
- --> $DIR/methods.rs:454:5
+ --> $DIR/methods.rs:456:5
| ^^^^^^^^^^ help: try removing the `clone` call: `42`
|
= note: `-D clone-on-copy` implied by `-D warnings`
error: using `clone` on a `Copy` type
| ^^^^^^^^^^ help: try removing the `clone` call: `42`
|
= note: `-D clone-on-copy` implied by `-D warnings`
error: using `clone` on a `Copy` type
- --> $DIR/methods.rs:458:5
+ --> $DIR/methods.rs:460:5
| ^^^^^^^^^^^^^ help: try dereferencing it: `*(&42)`
error: using '.clone()' on a ref-counted pointer
| ^^^^^^^^^^^^^ help: try dereferencing it: `*(&42)`
error: using '.clone()' on a ref-counted pointer
- --> $DIR/methods.rs:468:5
+ --> $DIR/methods.rs:470:5
| ^^^^^^^^^^ help: try this: `Rc::clone(&rc)`
|
= note: `-D clone-on-ref-ptr` implied by `-D warnings`
error: using '.clone()' on a ref-counted pointer
| ^^^^^^^^^^ help: try this: `Rc::clone(&rc)`
|
= note: `-D clone-on-ref-ptr` implied by `-D warnings`
error: using '.clone()' on a ref-counted pointer
- --> $DIR/methods.rs:471:5
+ --> $DIR/methods.rs:473:5
| ^^^^^^^^^^^ help: try this: `Arc::clone(&arc)`
error: using '.clone()' on a ref-counted pointer
| ^^^^^^^^^^^ help: try this: `Arc::clone(&arc)`
error: using '.clone()' on a ref-counted pointer
- --> $DIR/methods.rs:474:5
+ --> $DIR/methods.rs:476:5
| ^^^^^^^^^^^^^^ help: try this: `Weak::clone(&rcweak)`
error: using '.clone()' on a ref-counted pointer
| ^^^^^^^^^^^^^^ help: try this: `Weak::clone(&rcweak)`
error: using '.clone()' on a ref-counted pointer
- --> $DIR/methods.rs:477:5
+ --> $DIR/methods.rs:479:5
| ^^^^^^^^^^^^^^^^ help: try this: `Weak::clone(&arc_weak)`
error: using `clone` on a `Copy` type
| ^^^^^^^^^^^^^^^^ help: try this: `Weak::clone(&arc_weak)`
error: using `clone` on a `Copy` type
- --> $DIR/methods.rs:484:5
+ --> $DIR/methods.rs:486:5
| ^^^^^^^^^ help: try removing the `clone` call: `t`
error: using `clone` on a `Copy` type
| ^^^^^^^^^ help: try removing the `clone` call: `t`
error: using `clone` on a `Copy` type
- --> $DIR/methods.rs:486:5
+ --> $DIR/methods.rs:488:5
| ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `Some(t)`
error: using `clone` on a double-reference; this will copy the reference instead of cloning the inner type
| ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `Some(t)`
error: using `clone` on a double-reference; this will copy the reference instead of cloning the inner type
- --> $DIR/methods.rs:492:22
+ --> $DIR/methods.rs:494:22
-492 | let z: &Vec<_> = y.clone();
+494 | let z: &Vec<_> = y.clone();
| ^^^^^^^^^ help: try dereferencing it: `(*y).clone()`
|
= note: `-D clone-double-ref` implied by `-D warnings`
error: single-character string constant used as pattern
| ^^^^^^^^^ help: try dereferencing it: `(*y).clone()`
|
= note: `-D clone-double-ref` implied by `-D warnings`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:499:13
+ --> $DIR/methods.rs:501:13
| --------^^^- help: try using a char instead: `x.split('x')`
|
= note: `-D single-char-pattern` implied by `-D warnings`
error: single-character string constant used as pattern
| --------^^^- help: try using a char instead: `x.split('x')`
|
= note: `-D single-char-pattern` implied by `-D warnings`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:516:16
+ --> $DIR/methods.rs:518:16
| -----------^^^- help: try using a char instead: `x.contains('x')`
error: single-character string constant used as pattern
| -----------^^^- help: try using a char instead: `x.contains('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:517:19
+ --> $DIR/methods.rs:519:19
-517 | x.starts_with("x");
+519 | x.starts_with("x");
| --------------^^^- help: try using a char instead: `x.starts_with('x')`
error: single-character string constant used as pattern
| --------------^^^- help: try using a char instead: `x.starts_with('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:518:17
+ --> $DIR/methods.rs:520:17
| ------------^^^- help: try using a char instead: `x.ends_with('x')`
error: single-character string constant used as pattern
| ------------^^^- help: try using a char instead: `x.ends_with('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:519:12
+ --> $DIR/methods.rs:521:12
| -------^^^- help: try using a char instead: `x.find('x')`
error: single-character string constant used as pattern
| -------^^^- help: try using a char instead: `x.find('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:520:13
+ --> $DIR/methods.rs:522:13
| --------^^^- help: try using a char instead: `x.rfind('x')`
error: single-character string constant used as pattern
| --------^^^- help: try using a char instead: `x.rfind('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:521:14
+ --> $DIR/methods.rs:523:14
| ---------^^^- help: try using a char instead: `x.rsplit('x')`
error: single-character string constant used as pattern
| ---------^^^- help: try using a char instead: `x.rsplit('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:522:24
+ --> $DIR/methods.rs:524:24
-522 | x.split_terminator("x");
+524 | x.split_terminator("x");
| -------------------^^^- help: try using a char instead: `x.split_terminator('x')`
error: single-character string constant used as pattern
| -------------------^^^- help: try using a char instead: `x.split_terminator('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:523:25
+ --> $DIR/methods.rs:525:25
-523 | x.rsplit_terminator("x");
+525 | x.rsplit_terminator("x");
| --------------------^^^- help: try using a char instead: `x.rsplit_terminator('x')`
error: single-character string constant used as pattern
| --------------------^^^- help: try using a char instead: `x.rsplit_terminator('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:524:17
+ --> $DIR/methods.rs:526:17
| ------------^^^- help: try using a char instead: `x.splitn(0, 'x')`
error: single-character string constant used as pattern
| ------------^^^- help: try using a char instead: `x.splitn(0, 'x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:525:18
+ --> $DIR/methods.rs:527:18
-525 | x.rsplitn(0, "x");
+527 | x.rsplitn(0, "x");
| -------------^^^- help: try using a char instead: `x.rsplitn(0, 'x')`
error: single-character string constant used as pattern
| -------------^^^- help: try using a char instead: `x.rsplitn(0, 'x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:526:15
+ --> $DIR/methods.rs:528:15
| ----------^^^- help: try using a char instead: `x.matches('x')`
error: single-character string constant used as pattern
| ----------^^^- help: try using a char instead: `x.matches('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:527:16
+ --> $DIR/methods.rs:529:16
| -----------^^^- help: try using a char instead: `x.rmatches('x')`
error: single-character string constant used as pattern
| -----------^^^- help: try using a char instead: `x.rmatches('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:528:21
+ --> $DIR/methods.rs:530:21
-528 | x.match_indices("x");
+530 | x.match_indices("x");
| ----------------^^^- help: try using a char instead: `x.match_indices('x')`
error: single-character string constant used as pattern
| ----------------^^^- help: try using a char instead: `x.match_indices('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:529:22
+ --> $DIR/methods.rs:531:22
-529 | x.rmatch_indices("x");
+531 | x.rmatch_indices("x");
| -----------------^^^- help: try using a char instead: `x.rmatch_indices('x')`
error: single-character string constant used as pattern
| -----------------^^^- help: try using a char instead: `x.rmatch_indices('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:530:25
+ --> $DIR/methods.rs:532:25
-530 | x.trim_left_matches("x");
+532 | x.trim_left_matches("x");
| --------------------^^^- help: try using a char instead: `x.trim_left_matches('x')`
error: single-character string constant used as pattern
| --------------------^^^- help: try using a char instead: `x.trim_left_matches('x')`
error: single-character string constant used as pattern
- --> $DIR/methods.rs:531:26
+ --> $DIR/methods.rs:533:26
-531 | x.trim_right_matches("x");
+533 | x.trim_right_matches("x");
| ---------------------^^^- help: try using a char instead: `x.trim_right_matches('x')`
error: you are getting the inner pointer of a temporary `CString`
| ---------------------^^^- help: try using a char instead: `x.trim_right_matches('x')`
error: you are getting the inner pointer of a temporary `CString`
- --> $DIR/methods.rs:541:5
+ --> $DIR/methods.rs:543:5
-541 | CString::new("foo").unwrap().as_ptr();
+543 | CString::new("foo").unwrap().as_ptr();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D temporary-cstring-as-ptr` implied by `-D warnings`
= note: that pointer will be invalid outside this expression
help: assign the `CString` to a variable to extend its lifetime
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D temporary-cstring-as-ptr` implied by `-D warnings`
= note: that pointer will be invalid outside this expression
help: assign the `CString` to a variable to extend its lifetime
- --> $DIR/methods.rs:541:5
+ --> $DIR/methods.rs:543:5
-541 | CString::new("foo").unwrap().as_ptr();
+543 | CString::new("foo").unwrap().as_ptr();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: called `cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable
- --> $DIR/methods.rs:546:27
+ --> $DIR/methods.rs:548:27
-546 | let v2 : Vec<isize> = v.iter().cloned().collect();
+548 | let v2 : Vec<isize> = v.iter().cloned().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D iter-cloned-collect` implied by `-D warnings`
error: you should use the `starts_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D iter-cloned-collect` implied by `-D warnings`
error: you should use the `starts_with` method
- --> $DIR/methods.rs:553:8
+ --> $DIR/methods.rs:555:8
-553 | if s.chars().next().unwrap() == 'f' { // s.starts_with('f')
+555 | if s.chars().next().unwrap() == 'f' { // s.starts_with('f')
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `s.starts_with('f')`
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
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `s.starts_with('f')`
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:553:8
+ --> $DIR/methods.rs:555:8
-553 | if s.chars().next().unwrap() == 'f' { // s.starts_with('f')
+555 | if s.chars().next().unwrap() == 'f' { // s.starts_with('f')
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `ends_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `ends_with` method
- --> $DIR/methods.rs:556:8
+ --> $DIR/methods.rs:558:8
-556 | if s.chars().next_back().unwrap() == 'o' { // s.ends_with('o')
+558 | if s.chars().next_back().unwrap() == 'o' { // s.ends_with('o')
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `s.ends_with('o')`
|
= note: `-D chars-last-cmp` implied by `-D warnings`
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
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `s.ends_with('o')`
|
= note: `-D chars-last-cmp` implied by `-D warnings`
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:556:8
+ --> $DIR/methods.rs:558:8
-556 | if s.chars().next_back().unwrap() == 'o' { // s.ends_with('o')
+558 | if s.chars().next_back().unwrap() == 'o' { // s.ends_with('o')
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `ends_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `ends_with` method
- --> $DIR/methods.rs:559:8
+ --> $DIR/methods.rs:561:8
-559 | if s.chars().last().unwrap() == 'o' { // s.ends_with('o')
+561 | if s.chars().last().unwrap() == 'o' { // s.ends_with('o')
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `s.ends_with('o')`
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
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `s.ends_with('o')`
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:559:8
+ --> $DIR/methods.rs:561:8
-559 | if s.chars().last().unwrap() == 'o' { // s.ends_with('o')
+561 | if s.chars().last().unwrap() == 'o' { // s.ends_with('o')
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `starts_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `starts_with` method
- --> $DIR/methods.rs:562:8
+ --> $DIR/methods.rs:564:8
-562 | if s.chars().next().unwrap() != 'f' { // !s.starts_with('f')
+564 | if s.chars().next().unwrap() != 'f' { // !s.starts_with('f')
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!s.starts_with('f')`
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
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!s.starts_with('f')`
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:562:8
+ --> $DIR/methods.rs:564:8
-562 | if s.chars().next().unwrap() != 'f' { // !s.starts_with('f')
+564 | if s.chars().next().unwrap() != 'f' { // !s.starts_with('f')
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `ends_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `ends_with` method
- --> $DIR/methods.rs:565:8
+ --> $DIR/methods.rs:567:8
-565 | if s.chars().next_back().unwrap() != 'o' { // !s.ends_with('o')
+567 | if s.chars().next_back().unwrap() != 'o' { // !s.ends_with('o')
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!s.ends_with('o')`
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
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!s.ends_with('o')`
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:565:8
+ --> $DIR/methods.rs:567:8
-565 | if s.chars().next_back().unwrap() != 'o' { // !s.ends_with('o')
+567 | if s.chars().next_back().unwrap() != 'o' { // !s.ends_with('o')
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `ends_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `ends_with` method
- --> $DIR/methods.rs:568:8
+ --> $DIR/methods.rs:570:8
-568 | if s.chars().last().unwrap() != 'o' { // !s.ends_with('o')
+570 | if s.chars().last().unwrap() != 'o' { // !s.ends_with('o')
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!s.ends_with('o')`
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
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!s.ends_with('o')`
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:568:8
+ --> $DIR/methods.rs:570:8
-568 | if s.chars().last().unwrap() != 'o' { // !s.ends_with('o')
+570 | if s.chars().last().unwrap() != 'o' { // !s.ends_with('o')
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `ends_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^^^
error: you should use the `ends_with` method
- --> $DIR/methods.rs:575:5
+ --> $DIR/methods.rs:577:5
-575 | "".chars().last() == Some(' ');
+577 | "".chars().last() == Some(' ');
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `"".ends_with(' ')`
error: you should use the `ends_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `"".ends_with(' ')`
error: you should use the `ends_with` method
- --> $DIR/methods.rs:576:5
+ --> $DIR/methods.rs:578:5
-576 | Some(' ') != "".chars().last();
+578 | Some(' ') != "".chars().last();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!"".ends_with(' ')`
error: you should use the `ends_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!"".ends_with(' ')`
error: you should use the `ends_with` method
- --> $DIR/methods.rs:577:5
+ --> $DIR/methods.rs:579:5
-577 | "".chars().next_back() == Some(' ');
+579 | "".chars().next_back() == Some(' ');
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `"".ends_with(' ')`
error: you should use the `ends_with` method
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `"".ends_with(' ')`
error: you should use the `ends_with` method
- --> $DIR/methods.rs:578:5
+ --> $DIR/methods.rs:580:5
-578 | Some(' ') != "".chars().next_back();
+580 | Some(' ') != "".chars().next_back();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!"".ends_with(' ')`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!"".ends_with(' ')`