Trait BoolExt

pub trait BoolExt: TypeIdentity<Type = bool> + Sized {
    // Provided methods
    fn if_true<T, F>(self, some: F) -> Option<T>
       where F: FnOnce() -> T { ... }
    fn if_false<T, F>(self, some: F) -> Option<T>
       where F: FnOnce() -> T { ... }
}

Available on crate feature bools only.

Extension trait for bool.

Provided Methods

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

where F: FnOnce() -> T,

Returns Some(some()) if self is true, otherwise returns None.

This method is usable in all versions supported by this library, and is equivalent to the bool::then method, which was stabilized in Rust 1.50.

Example

use core_extensions::BoolExt;

assert_eq!(true .if_true(|| 100 ), Some(100));
assert_eq!(false.if_true(|| 100 ), None);

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

where F: FnOnce() -> T,

Returns Some(some()) if self is false, otherwise returns None.

Example

use core_extensions::BoolExt;

assert_eq!(false.if_false(|| 100 ), Some(100));
assert_eq!(true .if_false(|| 100 ), None);

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 BoolExt for bool

Implementors