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### What it does
Checks for unnecessary repetition of structure name when a
replacement with `Self` is applicable.
### Why is this bad?
Unnecessary repetition. Mixed use of `Self` and struct
name
feels inconsistent.
### Known problems
- Unaddressed false negative in fn bodies of trait implementations
- False positive with associated types in traits (#4140)
### Example
```
struct Foo;
impl Foo {
fn new() -> Foo {
Foo {}
}
}
```
could be
```
struct Foo;
impl Foo {
fn new() -> Self {
Self {}
}
}
```
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