pub static RUST_2021_INCOMPATIBLE_OR_PATTERNS: &'static Lint
Expand description
The rust_2021_incompatible_or_patterns
lint detects usage of old versions of or-patterns.
Example
ⓘ
#![deny(rust_2021_incompatible_or_patterns)]
macro_rules! match_any {
( $expr:expr , $( $( $pat:pat )|+ => $expr_arm:expr ),+ ) => {
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);
}
{{produces}}
Explanation
In Rust 2021, the pat
matcher will match additional patterns, which include the |
character.