Expand description
§Checking conditions with the IsNoneOr trait
The provided is_none_or method is a mirror to the core library’s is_some_and method.
It returns true if the option is a None or the option is Some and the value
inside of it matches a predicate.
§Examples
use is_none_or::IsNoneOr;
let x: Option<u32> = Some(2);
assert_eq!(x.is_none_or(|x| x > 1), true);
let x: Option<u32> = Some(0);
assert_eq!(x.is_none_or(|x| x > 1), false);
let x: Option<u32> = None;
assert_eq!(x.is_none_or(|x| x > 1), true);