diff options
Diffstat (limited to 'tests/ui/rfcs/rfc-0000-never_patterns/parse.rs')
-rw-r--r-- | tests/ui/rfcs/rfc-0000-never_patterns/parse.rs | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/tests/ui/rfcs/rfc-0000-never_patterns/parse.rs b/tests/ui/rfcs/rfc-0000-never_patterns/parse.rs new file mode 100644 index 000000000..1b23e60e0 --- /dev/null +++ b/tests/ui/rfcs/rfc-0000-never_patterns/parse.rs @@ -0,0 +1,71 @@ +#![feature(never_patterns)] +#![allow(incomplete_features)] + +enum Void {} + +fn main() {} + +macro_rules! never { + () => { ! } +} + +fn parse(x: Void) { + match None::<Void> { + None => {} + Some(!), + } + match None::<Void> { + Some(!), + None => {} + } + match None::<Void> { + None => {} + Some(!) + } + match None::<Void> { + Some(!) + //~^ ERROR expected `,` following `match` arm + None => {} + } + match None::<Void> { + Some(!) if true + //~^ ERROR expected `,` following `match` arm + //~| ERROR guard on a never pattern + None => {} + } + match None::<Void> { + Some(!) if true, + //~^ ERROR guard on a never pattern + None => {} + } + match None::<Void> { + Some(!) <= + //~^ ERROR expected one of + } + match x { + never!(), + } + match x { + never!() if true, + //~^ ERROR guard on a never pattern + } + match x { + never!() + } + match &x { + &never!(), + } + match None::<Void> { + Some(never!()), + None => {} + } + match x { ! } + match &x { &! } + + let res: Result<bool, Void> = Ok(false); + let Ok(_) = res; + let Ok(_) | Err(!) = &res; // Disallowed; see #82048. + //~^ ERROR top-level or-patterns are not allowed in `let` bindings + let (Ok(_) | Err(!)) = &res; + let (Ok(_) | Err(&!)) = res.as_ref(); +} |