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Add multiline test

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Jeremy Stucki 2019-08-14 19:34:50 +02:00
parent dbe2bb4256
commit 214d499103
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GPG key ID: 8F548A5A2ED13F58
3 changed files with 23 additions and 1 deletions
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8
tests/ui/unnecessary_fold.fixed
View file

@ -41,4 +41,12 @@ fn unnecessary_fold_should_ignore() {
let _ = [(0..2), (0..3)].iter().fold(1, |a, b| a * b.len());
}
/// Should lint only the line containing the fold
fn unnecessary_fold_over_multiple_lines() {
let _ = (0..3)
.map(|x| x + 1)
.filter(|x| x % 2 == 0)
.any(|x| x > 2);
}
fn main() {}

8
tests/ui/unnecessary_fold.rs
View file

@ -41,4 +41,12 @@ fn unnecessary_fold_should_ignore() {
let _ = [(0..2), (0..3)].iter().fold(1, |a, b| a * b.len());
}
/// Should lint only the line containing the fold
fn unnecessary_fold_over_multiple_lines() {
let _ = (0..3)
.map(|x| x + 1)
.filter(|x| x % 2 == 0)
.fold(false, |acc, x| acc || x > 2);
}
fn main() {}

8
tests/ui/unnecessary_fold.stderr
View file

@ -30,5 +30,11 @@ error: this `.fold` can be written more succinctly using another method
LL | let _: bool = (0..3).map(|x| 2 * x).fold(false, |acc, x| acc || x > 2);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.any(|x| x > 2)`
error: aborting due to 5 previous errors
error: this `.fold` can be written more succinctly using another method
--> $DIR/unnecessary_fold.rs:49:10
|
LL | .fold(false, |acc, x| acc || x > 2);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `any(|x| x > 2)`
error: aborting due to 6 previous errors