blob: d91b3a358da1cc7e2c7de86ac9a6c0c13ec6aa4d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
// Macros can be used for (parts of) the pattern and expression in an if let guard
// check-pass
#![feature(if_let_guard)]
#![feature(let_chains)]
macro_rules! m {
(pattern $i:ident) => { Some($i) };
(expression $e:expr) => { $e };
}
fn main() {
match () {
() if let m!(pattern x) = m!(expression Some(4)) => {}
() if let [m!(pattern y)] = [Some(8 + m!(expression 4))] => {}
_ => {}
}
}
|
