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Merge pull request #2975 from aaudiber/lint-identity-into-iter

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Lint using identity into_iter conversion
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Philipp Hansch 2018-08-05 20:38:28 +01:00 • committed by GitHub
commit 32e4897854
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3 changed files with 34 additions and 9 deletions
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3
tests/ui/identity_conversion.rs
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@ -32,9 +32,12 @@ fn main() {
{
let _: String = "foo".into();
let _ = String::from("foo");
let _ = "".lines().into_iter();
}
let _: String = "foo".to_string().into();
let _: String = From::from("foo".to_string());
let _ = String::from("foo".to_string());
let _ = "".lines().into_iter();
let _ = vec![1, 2, 3].into_iter().into_iter();
}

26
tests/ui/identity_conversion.stderr
View file

@ -23,22 +23,34 @@ error: identical conversion
| ^^^^^^^^^^^ help: consider removing `.into()`: `0i32`
error: identical conversion
--> $DIR/identity_conversion.rs:37:21
--> $DIR/identity_conversion.rs:38:21
|
37 | let _: String = "foo".to_string().into();
38 | let _: String = "foo".to_string().into();
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `"foo".to_string()`
error: identical conversion
--> $DIR/identity_conversion.rs:38:21
--> $DIR/identity_conversion.rs:39:21
|
38 | let _: String = From::from("foo".to_string());
39 | let _: String = From::from("foo".to_string());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `From::from()`: `"foo".to_string()`
error: identical conversion
--> $DIR/identity_conversion.rs:39:13
--> $DIR/identity_conversion.rs:40:13
|
39 | let _ = String::from("foo".to_string());
40 | let _ = String::from("foo".to_string());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `"foo".to_string()`
error: aborting due to 6 previous errors
error: identical conversion
--> $DIR/identity_conversion.rs:41:13
|
41 | let _ = "".lines().into_iter();
| ^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `"".lines()`
error: identical conversion
--> $DIR/identity_conversion.rs:42:13
|
42 | let _ = vec![1, 2, 3].into_iter().into_iter();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `vec![1, 2, 3].into_iter()`
error: aborting due to 8 previous errors