Trait gazebo::prelude::OptionExt [−][src]
pub trait OptionExt {
type Item;
fn into_try_map<U, E, F: FnOnce(Self::Item) -> Result<U, E>>(
self,
f: F
) -> Result<Option<U>, E>;
fn try_map<U, E, F: FnOnce(&Self::Item) -> Result<U, E>>(
self,
f: F
) -> Result<Option<U>, E>;
}
Expand description
Extension traits on Option
where it holds any value or ref.
Associated Types
Required methods
Like map
, but as a Result
use gazebo::prelude::*;
assert_eq!(Some("foo").into_try_map(|x| Ok::<_, ()>(x.len())), Ok(Some(3)));
assert_eq!(Some("foo").into_try_map(|x| Err::<(), _>(())), Err(()));