bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Rollup merge of #118157 - Nadrieril:never_pat-feature-gate, r=compiler-errors

Browse source 
Add `never_patterns` feature gate

This PR adds the feature gate and most basic parsing for the experimental `never_patterns` feature. See the tracking issue (https://github.com/rust-lang/rust/issues/118155) for details on the experiment.

`@scottmcm` has agreed to be my lang-team liaison for this experiment.
This commit is contained in:
Matthias Krüger 2023-11-29 12:34:47 +01:00 • committed by GitHub
commit c03f8917ee
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
40 changed files with 325 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

2
compiler/rustc_lint/src/unused.rs
View file

@ -1154,7 +1154,7 @@ impl EarlyLintPass for UnusedParens {
// Do not lint on `(..)` as that will result in the other arms being useless.
Paren(_)
// The other cases do not contain sub-patterns.
| Wild | Rest | Lit(..) | MacCall(..) | Range(..) | Ident(.., None) | Path(..) => {},
| Wild | Never | Rest | Lit(..) | MacCall(..) | Range(..) | Ident(.., None) | Path(..) => {},
// These are list-like patterns; parens can always be removed.
TupleStruct(_, _, ps) | Tuple(ps) | Slice(ps) | Or(ps) => for p in ps {
self.check_unused_parens_pat(cx, p, false, false, keep_space);