Create your own enum type that behaves like Rust’s Option but with custom names.
use option_like::option_like;
option_like!(
#[derive(Debug, PartialEq)]
pub enum Cached<T> {
Hit(T),
Miss,
}
is_some => is_hit
is_none => is_miss
);
// Create instances
let c1 = Cached::<u32>::Hit(42);
let c2 = Cached::<u32>::Miss;
// Boolean tests
assert!(c1.is_hit());
assert!(c2.is_miss());
// Convert to Option
assert_eq!(Option::<u32>::from(c1), Some(42));
assert_eq!(Option::<u32>::from(c2), None);
// Convert from Option
assert_eq!(Cached::<u32>::from(Some(42)), Cached::Hit(42));
assert_eq!(Cached::<u32>::from(None), Cached::Miss);cargo add option-likeLike the project? ⭐ Star this repo on GitHub!
Apache-2.0 or MIT.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this crate by you, shall be licensed as above, without any additional terms or conditions.