Trait Some 

pub trait Some {
    // Required methods
    fn some<T>(self, t: T) -> Option<T>;
    fn some_with<T, F>(self, f: F) -> Option<T>
       where F: FnOnce() -> T;
}

Provides the some and some_with methods on bool.

Required Methods

fn some<T>(self, t: T) -> Option<T>

Returns Some(t) if the bool is true, or None otherwise.

Arguments passed to some are eagerly evaluated; if you are passing the result of a function call, it is recommended to use some_with, which is lazily evaluated.

Examples

use then::Some;

assert_eq!(false.some(0), None);
assert_eq!(true.some(0), Some(0));

fn some_with<T, F>(self, f: F) -> Option<T>

where F: FnOnce() -> T,

Returns Some(f()) if the bool is true, or None otherwise.

Examples

use then::Some;

assert_eq!(false.some_with(|| 0), None);
assert_eq!(true.some_with(Default::default), Some(0));

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Some for bool

fn some<T>(self, t: T) -> Option<T>

fn some_with<T, F>(self, f: F) -> Option<T>

where F: FnOnce() -> T,

Implementors