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Auto merge of #3987 - phansch:rustfix_option_map_or_none, r=flip1995

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Add run-rustfix for option_map_or_none lint

* Extracts `option_map_or_none` tests into separate file
 * Adds `// run-rustfix` to `tests/ui/option_map_or_none.rs`

cc #3630
This commit is contained in:
bors 2019-04-18 09:43:42 +00:00
commit 95e537b039
5 changed files with 73 additions and 54 deletions
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10
tests/ui/methods.rs
View file

@ -148,7 +148,6 @@ impl Mul<T> for T {
/// Checks implementation of the following lints:
/// * `OPTION_MAP_UNWRAP_OR`
/// * `OPTION_MAP_UNWRAP_OR_ELSE`
/// * `OPTION_MAP_OR_NONE`
#[rustfmt::skip]
fn option_methods() {
let opt = Some(1);
@ -204,15 +203,6 @@ fn option_methods() {
// Macro case.
// Should not lint.
let _ = opt_map!(opt, |x| x + 1).unwrap_or_else(|| 0);
// Check `OPTION_MAP_OR_NONE`.
// Single line case.
let _ = opt.map_or(None, |x| Some(x + 1));
// Multi-line case.
let _ = opt.map_or(None, |x| {
Some(x + 1)
}
);
}
/// Checks implementation of `FILTER_NEXT` lint.

64
tests/ui/methods.stderr
View file

@ -29,7 +29,7 @@ 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
--> $DIR/methods.rs:157:13
|
LL | let _ = opt.map(|x| x + 1)
| _____________^
@ -41,7 +41,7 @@ LL | | .unwrap_or(0);
= 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
--> $DIR/methods.rs:161:13
|
LL | let _ = opt.map(|x| {
| _____________^
@ -51,7 +51,7 @@ 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
--> $DIR/methods.rs:165:13
|
LL | let _ = opt.map(|x| x + 1)
| _____________^
@ -61,7 +61,7 @@ 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
--> $DIR/methods.rs:170:13
|
LL | let _ = opt.map(|x| Some(x + 1)).unwrap_or(None);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -69,7 +69,7 @@ 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
--> $DIR/methods.rs:172:13
|
LL | let _ = opt.map(|x| {
| _____________^
@ -79,7 +79,7 @@ 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
--> $DIR/methods.rs:176:13
|
LL | let _ = opt
| _____________^
@ -90,7 +90,7 @@ 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
--> $DIR/methods.rs:187:13
|
LL | let _ = Some("prefix").map(|p| format!("{}.", p)).unwrap_or(id);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -98,7 +98,7 @@ 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
--> $DIR/methods.rs:191:13
|
LL | let _ = opt.map(|x| x + 1)
| _____________^
@ -110,7 +110,7 @@ LL | | .unwrap_or_else(|| 0);
= 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
--> $DIR/methods.rs:195:13
|
LL | let _ = opt.map(|x| {
| _____________^
@ -120,7 +120,7 @@ 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
--> $DIR/methods.rs:199:13
|
LL | let _ = opt.map(|x| x + 1)
| _____________^
@ -129,32 +129,8 @@ 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:224:13
--> $DIR/methods.rs:214:13
|
LL | let _ = v.iter().filter(|&x| *x < 0).next();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -163,7 +139,7 @@ LL | let _ = v.iter().filter(|&x| *x < 0).next();
= 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:227:13
--> $DIR/methods.rs:217:13
|
LL | let _ = v.iter().filter(|&x| {
| _____________^
@ -173,7 +149,7 @@ LL | | ).next();
| |___________________________^
error: called `is_some()` after searching an `Iterator` with find. This is more succinctly expressed by calling `any()`.
--> $DIR/methods.rs:243:13
--> $DIR/methods.rs:233:13
|
LL | let _ = v.iter().find(|&x| *x < 0).is_some();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -182,7 +158,7 @@ LL | let _ = v.iter().find(|&x| *x < 0).is_some();
= 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:246:13
--> $DIR/methods.rs:236:13
|
LL | let _ = v.iter().find(|&x| {
| _____________^
@ -192,7 +168,7 @@ LL | | ).is_some();
| |______________________________^
error: called `is_some()` after searching an `Iterator` with position. This is more succinctly expressed by calling `any()`.
--> $DIR/methods.rs:252:13
--> $DIR/methods.rs:242:13
|
LL | let _ = v.iter().position(|&x| x < 0).is_some();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -200,7 +176,7 @@ 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:255:13
--> $DIR/methods.rs:245:13
|
LL | let _ = v.iter().position(|&x| {
| _____________^
@ -210,7 +186,7 @@ LL | | ).is_some();
| |______________________________^
error: called `is_some()` after searching an `Iterator` with rposition. This is more succinctly expressed by calling `any()`.
--> $DIR/methods.rs:261:13
--> $DIR/methods.rs:251:13
|
LL | let _ = v.iter().rposition(|&x| x < 0).is_some();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -218,7 +194,7 @@ 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:264:13
--> $DIR/methods.rs:254:13
|
LL | let _ = v.iter().rposition(|&x| {
| _____________^
@ -228,12 +204,12 @@ LL | | ).is_some();
| |______________________________^
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:279:13
--> $DIR/methods.rs:269:13
|
LL | let _ = opt.unwrap();
| ^^^^^^^^^^^^
|
= note: `-D clippy::option-unwrap-used` implied by `-D warnings`
error: aborting due to 25 previous errors
error: aborting due to 23 previous errors

14
tests/ui/option_map_or_none.fixed Normal file
View file

@ -0,0 +1,14 @@
// run-rustfix
fn main() {
let opt = Some(1);
// Check `OPTION_MAP_OR_NONE`.
// Single line case.
let _ = opt.and_then(|x| Some(x + 1));
// Multi-line case.
#[rustfmt::skip]
let _ = opt.and_then(|x| {
Some(x + 1)
});
}

14
tests/ui/option_map_or_none.rs Normal file
View file

@ -0,0 +1,14 @@
// run-rustfix
fn main() {
let opt = Some(1);
// Check `OPTION_MAP_OR_NONE`.
// Single line case.
let _ = opt.map_or(None, |x| Some(x + 1));
// Multi-line case.
#[rustfmt::skip]
let _ = opt.map_or(None, |x| {
Some(x + 1)
});
}

25
tests/ui/option_map_or_none.stderr Normal file
View file

@ -0,0 +1,25 @@
error: called `map_or(None, f)` on an Option value. This can be done more directly by calling `and_then(f)` instead
--> $DIR/option_map_or_none.rs:8:13
|
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/option_map_or_none.rs:11:13
|
LL | let _ = opt.map_or(None, |x| {
| _____________^
LL | | Some(x + 1)
LL | | });
| |_________________________^
help: try using and_then instead
|
LL | let _ = opt.and_then(|x| {
LL | Some(x + 1)
LL | });
|
error: aborting due to 2 previous errors