Trait core_extensions::BoolExt

pub trait BoolExt: TypeIdentity<Type = bool> + Sized {
    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,
    { ... }
}

This is supported 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);

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Implementations on Foreign Types

impl BoolExt for bool

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Implementors

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