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Auto merge of #97313 - cjgillot:ast-lifetimes-anon, r=petrochenkov

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Resolve function lifetime elision on the AST

~Based on https://github.com/rust-lang/rust/pull/97720~

Lifetime elision for functions is purely syntactic in nature, so can be resolved on the AST.
This PR replicates the elision logic and diagnostics on the AST, and replaces HIR-based resolution by a `delay_span_bug`.

This refactor allows for more consistent diagnostics, which don't have to guess the original code from HIR.

r? `@petrochenkov`
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bors 2022-07-25 20:02:55 +00:00
commit 6dbae3ad19
58 changed files with 1719 additions and 1786 deletions
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2
compiler/rustc_hir/src/def.rs
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@ -713,7 +713,7 @@ impl<Id> Res<Id> {
}
/// Resolution for a lifetime appearing in a type.
#[derive(Copy, Clone, Debug)]
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum LifetimeRes {
/// Successfully linked the lifetime to a generic parameter.
Param {