rust/tests/ui/macros/macro-pat2021-pattern-followed-by-or.rs
2024-02-16 20:02:50 +00:00

23 lines
878 B
Rust

//@ edition:2021
#![allow(unused_macros)]
macro_rules! foo { ($x:pat | $y:pat) => {} } //~ ERROR `$x:pat` is followed by `|`, which is not allowed for `pat` fragments
macro_rules! baz { ($x:pat_param | $y:pat_param) => {} } // should be ok
macro_rules! qux { ($x:pat_param | $y:pat) => {} } // should be ok
macro_rules! ogg { ($x:pat | $y:pat_param) => {} } //~ ERROR `$x:pat` is followed by `|`, which is not allowed for `pat` fragments
macro_rules! match_any {
( $expr:expr , $( $( $pat:pat)|+ => $expr_arm:pat),+ ) => { //~ ERROR `$pat:pat` may be followed by `|`, which is not allowed for `pat` fragments
match $expr {
$(
$( $pat => $expr_arm, )+
)+
}
};
}
fn main() {
let result: Result<i64, i32> = Err(42);
let int: i64 = match_any!(result, Ok(i) | Err(i) => i.into());
assert_eq!(int, 42);
}