1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
// run-pass
#[allow(dead_code)]
fn macros() {
macro_rules! foo{
($p:pat, $e:expr, $b:block) => {{
while let $p = $e $b
//~^ WARN irrefutable `while let`
//~| WARN irrefutable `while let`
}}
}
macro_rules! bar{
($p:pat, $e:expr, $b:block) => {{
foo!($p, $e, $b)
}}
}
foo!(_a, 1, {
println!("irrefutable pattern");
});
bar!(_a, 1, {
println!("irrefutable pattern");
});
}
pub fn main() {
while let _a = 1 { //~ WARN irrefutable `while let`
println!("irrefutable pattern");
break;
}
}
|
