blob: 7ee31d85c2b12d6b51ebb66a0a9332a202d9ca64 (
plain)
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
|
// build-fail
// known-bug: #95134
// compile-flags: -Copt-level=0
// dont-check-failure-status
// dont-check-compiler-stderr
// ignore-compare-mode-next-solver (hangs)
pub fn encode_num<Writer: ExampleWriter>(n: u32, mut writer: Writer) -> Result<(), Writer::Error> {
if n > 15 {
encode_num(n / 16, &mut writer)?;
}
Ok(())
}
pub trait ExampleWriter {
type Error;
}
impl<'a, T: ExampleWriter> ExampleWriter for &'a mut T {
type Error = T::Error;
}
struct EmptyWriter;
impl ExampleWriter for EmptyWriter {
type Error = ();
}
fn main() {
encode_num(69, &mut EmptyWriter).unwrap();
}
|
