6499eb5577
Detect when method call on argument could be removed to fulfill failed trait bound
When encountering
```rust
struct Foo;
struct Bar;
impl From<Bar> for Foo {
fn from(_: Bar) -> Self { Foo }
}
fn qux(_: impl From<Bar>) {}
fn main() {
qux(Bar.into());
}
```
Suggest removing `.into()`:
```
error[E0283]: type annotations needed
--> f100.rs:8:13
|
8 | qux(Bar.into());
| --- ^^^^
| |
| required by a bound introduced by this call
|
= note: cannot satisfy `_: From<Bar>`
note: required by a bound in `qux`
--> f100.rs:6:16
|
6 | fn qux(_: impl From<Bar>) {}
| ^^^^^^^^^ required by this bound in `qux`
help: try using a fully qualified path to specify the expected types
|
8 | qux(<Bar as Into<T>>::into(Bar));
| +++++++++++++++++++++++ ~
help: consider removing this method call, as the receiver has type `Bar` and `Bar: From<Bar>` trivially holds
|
8 - qux(Bar.into());
8 + qux(Bar);
|
```
Fix #71252
|
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| .reuse | ||
| compiler | ||
| library | ||
| LICENSES | ||
| src | ||
| tests | ||
| .editorconfig | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .gitmodules | ||
| .mailmap | ||
| Cargo.lock | ||
| Cargo.toml | ||
| CODE_OF_CONDUCT.md | ||
| config.example.toml | ||
| configure | ||
| CONTRIBUTING.md | ||
| COPYRIGHT | ||
| INSTALL.md | ||
| LICENSE-APACHE | ||
| LICENSE-MIT | ||
| README.md | ||
| RELEASES.md | ||
| rust-bors.toml | ||
| rustfmt.toml | ||
| triagebot.toml | ||
| x | ||
| x.ps1 | ||
| x.py | ||
The Rust Programming Language
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