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`hir::Lifetime::ident` currently sometimes uses `kw::Empty` for elided lifetimes and sometimes uses `kw::UnderscoreLifetime`, and the distinction is used when creating some error suggestions, e.g. in `Lifetime::suggestion` and `ImplicitLifetimeFinder::visit_ty`. I found this *really* confusing, and it took me a while to understand what was going on. This commit replaces all uses of `kw::Empty` in `hir::Lifetime::ident` with `kw::UnderscoreLifetime`. It adds a new field `hir::Lifetime::is_path_anon` that mostly replaces the old empty/underscore distinction and makes things much clearer. Some other notable changes: - Adds a big comment to `Lifetime` talking about permissable field values. - Adds some assertions in `new_named_lifetime` about what ident values are permissible for the different `LifetimeRes` values. - Adds a `Lifetime::new` constructor that does some checking to make sure the `is_elided` and `is_anonymous` states are valid. - `add_static_impl_trait_suggestion` now looks at `Lifetime::res` instead of the ident when creating the suggestion. This is the one case where `is_path_anon` doesn't replace the old empty/underscore distinction. - A couple of minor pretty-printing improvements. |
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|---|---|---|
| .. | ||
| hir | ||
| arena.rs | ||
| def_path_hash_map.rs | ||
| def.rs | ||
| definitions.rs | ||
| diagnostic_items.rs | ||
| hir_id.rs | ||
| hir.rs | ||
| intravisit.rs | ||
| lang_items.rs | ||
| lib.rs | ||
| pat_util.rs | ||
| stable_hash_impls.rs | ||
| target.rs | ||
| tests.rs | ||
| weak_lang_items.rs | ||