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Dylan DPC e5a86d7358
Rollup merge of #98705 - WaffleLapkin:closure_binder, r=cjgillot 
Implement `for<>` lifetime binder for closures

This PR implements RFC 3216 ([TI](https://github.com/rust-lang/rust/issues/97362)) and allows code like the following:

```rust
let _f = for<'a, 'b> |a: &'a A, b: &'b B| -> &'b C { b.c(a) };
//       ^^^^^^^^^^^--- new!
```

cc ``@Aaron1011`` ``@cjgillot``
2022-07-14 14:14:21 +05:30
..
src Rollup merge of #98705 - WaffleLapkin:closure_binder, r=cjgillot 2022-07-14 14:14:21 +05:30
Cargo.toml macros: add diagnostic derive for lints 2022-07-05 16:00:21 +01:00