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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``
This commit is contained in:
Dylan DPC 2022-07-14 14:14:21 +05:30 committed by GitHub
commit e5a86d7358
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91 changed files with 843 additions and 208 deletions

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@ -154,6 +154,7 @@ impl<'a, T: EarlyLintPass> ast_visit::Visitor<'a> for EarlyContextAndPass<'a, T>
self.check_id(closure_id);
}
}
run_early_pass!(self, check_fn_post, fk, span, id);
}
@ -218,7 +219,7 @@ impl<'a, T: EarlyLintPass> ast_visit::Visitor<'a> for EarlyContextAndPass<'a, T>
// Explicitly check for lints associated with 'closure_id', since
// it does not have a corresponding AST node
match e.kind {
ast::ExprKind::Closure(_, ast::Async::Yes { closure_id, .. }, ..)
ast::ExprKind::Closure(_, _, ast::Async::Yes { closure_id, .. }, ..)
| ast::ExprKind::Async(_, closure_id, ..) => self.check_id(closure_id),
_ => {}
}