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
32
33
34
35
36
37
38
39
40
41
42
43
|
macro_rules! foo {
() => {
break (); //~ ERROR `break` outside of a loop or labeled block
};
($e: expr) => {
break $e; //~ ERROR `break` outside of a loop or labeled block
};
(stmt $s: stmt) => {
$s
};
(@ $e: expr) => {
{ break $e; } //~ ERROR `break` outside of a loop or labeled block
};
(=> $s: stmt) => {
{ $s }
};
}
fn main() {
{
foo!();
}
{
foo!(());
}
{
foo!(stmt break ()); //~ ERROR `break` outside of a loop or labeled block
}
{
foo!(@ ());
}
{
foo!(=> break ()); //~ ERROR `break` outside of a loop or labeled block
}
{
macro_rules! bar {
() => {
break () //~ ERROR `break` outside of a loop or labeled block
};
}
bar!()
}
}
|
