or_patterns: unused_parens lints erroneously on _a @ (0 | 1) (original) (raw)
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Description
#![feature(or_patterns)] #![allow(incomplete_features)]
fn foo() { match 0 { _a @ (0 | 1) => {} _ => {} }
let () = 0; // Prevent the ICE in MIR.}
results in:
warning: unnecessary parentheses around pattern
--> src/lib.rs:6:14
|
6 | _a @ (0 | 1) => {}
| ^^^^^^^ help: remove these parentheses
|
= note: #[warn(unused_parens)] on by default
changing things into _a @ (0 | 1) will correctly refuse to parse.
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