pub trait OptionExt<T> {
fn has<U>(&self, value: &U) -> bool
where
U: PartialEq<T>;
}
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Returns true
if the option is a Some
value containing the given value.
use fungus::core::*;
let x: Option<u32> = Some(2);
assert!(x.has(&2));
let x: Option<u32> = Some(3);
assert!(!x.has(&2));
let x: Option<u32> = None;
assert!(!x.has(&2));
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