// run-rustfix #![deny(or_patterns_back_compat)] #![allow(unused_macros)] macro_rules! foo { ($x:pat_param | $y:pat) => {} } //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro macro_rules! bar { ($($x:pat_param)+ | $($y:pat)+) => {} } //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro 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_param | $y:pat_param) => {} } //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro macro_rules! match_any { ( $expr:expr , $( $( $pat:pat_param )|+ => $expr_arm:expr ),+ ) => { //~ ERROR the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro match $expr { $( $( $pat => $expr_arm, )+ )+ } }; } fn main() { let result: Result = Err(42); let int: i64 = match_any!(result, Ok(i) | Err(i) => i.into()); assert_eq!(int, 42); }