rust/tests/ui/traits/issue-72455.rs
2023-01-11 09:32:08 +00:00

28 lines
469 B
Rust

// check-pass
pub trait ResultExt {
type Ok;
fn err_eprint_and_ignore(self) -> Option<Self::Ok>;
}
impl<O, E> ResultExt for std::result::Result<O, E>
where
E: std::error::Error,
{
type Ok = O;
fn err_eprint_and_ignore(self) -> Option<O>
where
Self: ,
{
match self {
Err(e) => {
eprintln!("{}", e);
None
}
Ok(o) => Some(o),
}
}
}
fn main() {}