mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 15:01:51 +00:00
30 lines
592 B
Rust
30 lines
592 B
Rust
//@ build-fail
|
|
//@ normalize-stderr-test: ".nll/" -> "/"
|
|
|
|
trait ToOpt: Sized {
|
|
fn to_option(&self) -> Option<Self>;
|
|
}
|
|
|
|
impl ToOpt for usize {
|
|
fn to_option(&self) -> Option<usize> {
|
|
Some(*self)
|
|
}
|
|
}
|
|
|
|
impl<T:Clone> ToOpt for Option<T> {
|
|
fn to_option(&self) -> Option<Option<T>> {
|
|
Some((*self).clone())
|
|
}
|
|
}
|
|
|
|
fn function<T:ToOpt + Clone>(counter: usize, t: T) {
|
|
if counter > 0 {
|
|
function(counter - 1, t.to_option());
|
|
//~^ ERROR reached the recursion limit while instantiating `function::<Option<
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
function(22, 22);
|
|
}
|