| pub struct Something; |
| |
| type Validator<'a> = dyn 'a + Send + Sync + Fn(&'a Something) -> Result<(), ()>; |
| |
| pub static ALL_VALIDATORS: &[(&'static str, &'static Validator)] = |
| &[("validate that credits and debits balance", &validate_something)]; |
| |
| fn or<'a>(first: &'static Validator<'a>, second: &'static Validator<'a>) -> Validator<'a> { |
| //~^ ERROR return type cannot be a trait object without pointer indirection |
| return Box::new(move |something: &'_ Something| -> Result<(), ()> { |
| first(something).or_else(|_| second(something)) |
| }); |
| } |
| |
| fn validate_something(_: &Something) -> Result<(), ()> { |
| Ok(()) |
| } |
| |
| fn main() {} |
