bors c95346b8ac Auto merge of #91557 - cjgillot:ast-lifetimes-named, r=petrochenkov ... Perform lifetime resolution on the AST for lowering Lifetime resolution is currently implemented several times. Once during lowering in order to introduce in-band lifetimes, and once in the resolve_lifetimes query. However, due to the global nature of lifetime resolution and how it interferes with hygiene, it is better suited on the AST. This PR implements a first draft of lifetime resolution on the AST. For now, we specifically target named lifetimes and everything we need to remove lifetime resolution from lowering. Some diagnostics have already been ported, and sometimes made more precise using available hygiene information. Follow-up PRs will address in particular the resolution of anonymous lifetimes on the AST. We reuse the rib design of the current resolution framework. Specific `LifetimeRib` and `LifetimeRibKind` types are introduced. The most important variant is `LifetimeRibKind::Generics`, which happens each time we encounter something which may introduce generic lifetime parameters. It can be an item or a `for<...>` binder. The `LifetimeBinderKind` specifies how this rib behaves with respect to in-band lifetimes. r? `@petrochenkov`		2022-04-27 23:13:28 +00:00
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src	Auto merge of #91557 - cjgillot:ast-lifetimes-named, r=petrochenkov	2022-04-27 23:13:28 +00:00
Cargo.toml	span: move MultiSpan	2022-04-05 07:01:00 +01:00