48 lines
1.3 KiB
Rust
48 lines
1.3 KiB
Rust
#![feature(never_patterns)]
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#![allow(incomplete_features)]
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#[derive(Copy, Clone)]
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enum Void {}
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fn main() {
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let x: Result<bool, &(u32, u32, Void)> = Ok(false);
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match x {
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Ok(_x) | Err(&!) => {}
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}
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let (Ok(_x) | Err(&!)) = x;
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match x {
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Ok(_) => {}
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Err(&(_a, _b, !)),
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//~^ ERROR: never patterns cannot contain variable bindings
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//~| ERROR: never patterns cannot contain variable bindings
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}
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match x {
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Ok(_ok) | Err(&(_a, _b, !)) => {}
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//~^ ERROR: never patterns cannot contain variable bindings
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//~| ERROR: never patterns cannot contain variable bindings
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}
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}
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fn void(void: Void) {
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let (_a | !) = void;
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let (! | _a) = void;
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let ((_a, _) | (_a, _ | !)) = (true, void);
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let (_a | (! | !,)) = (void,);
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let ((_a,) | (!,)) = (void,);
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let (_a, (! | !)) = (true, void);
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//~^ ERROR: never patterns cannot contain variable bindings
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let (_a, (_b | !)) = (true, void);
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let _a @ ! = void;
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//~^ ERROR: never patterns cannot contain variable bindings
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let _a @ (_b | !) = void;
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let (_a @ (), !) = ((), void);
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//~^ ERROR: never patterns cannot contain variable bindings
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let (_a |
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(_b @ (_, !))) = (true, void);
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//~^ ERROR: never patterns cannot contain variable bindings
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}
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