56 lines
1.3 KiB
Rust
56 lines
1.3 KiB
Rust
#![deny(unreachable_patterns)]
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// check-pass
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// We wrap patterns in a tuple because top-level or-patterns were special-cased.
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fn main() {
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match (0,) {
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(1 | 2,) => {}
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_ => {}
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}
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match (0, 0) {
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(1 | 2, 3 | 4) => {}
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(1, 2) => {}
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(3, 1) => {}
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_ => {}
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}
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match (Some(0u8),) {
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(None | Some(0 | 1),) => {}
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(Some(2..=255),) => {}
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}
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match ((0,),) {
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((0 | 1,) | (2 | 3,),) => {}
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((_,),) => {}
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}
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match (&[0u8][..],) {
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([] | [0 | 1..=255] | [_, ..],) => {}
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}
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match ((0, 0),) {
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((0, 0) | (0, 1),) => {}
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_ => {}
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}
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match ((0, 0),) {
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((0, 0) | (1, 0),) => {}
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_ => {}
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}
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match ((0, 0),) {
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// Note how the second one would be redundant without the guard.
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((x, y) | (y, x),) if x == 0 => {}
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_ => {}
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}
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match 0 {
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// We don't warn the second one as redundant in general because of cases like the one above.
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// We could technically do it if there are no bindings.
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0 | 0 if 0 == 0 => {}
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_ => {}
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}
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// This one caused ICE https://github.com/rust-lang/rust/issues/117378
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match (0u8, 0) {
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(x @ 0 | x @ (1 | 2), _) => {}
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(3.., _) => {}
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}
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}
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