5 /// Returns `Some(t)` if the `bool` is `true`, or `None` otherwise.
10 /// #![feature(bool_to_option)]
12 /// assert_eq!(false.then_some(0), None);
13 /// assert_eq!(true.then_some(0), Some(0));
15 #[unstable(feature = "bool_to_option", issue = "64260")]
17 pub fn then_some<T>(self, t: T) -> Option<T> {
18 if self { Some(t) } else { None }
21 /// Returns `Some(f())` if the `bool` is `true`, or `None` otherwise.
26 /// assert_eq!(false.then(|| 0), None);
27 /// assert_eq!(true.then(|| 0), Some(0));
29 #[stable(feature = "lazy_bool_to_option", since = "1.50.0")]
31 pub fn then<T, F: FnOnce() -> T>(self, f: F) -> Option<T> {
32 if self { Some(f()) } else { None }