Trait ArrayExt 

pub trait ArrayExt: Sealed {
    type Elem;

    // Required methods
    fn generate<F: FnMut(usize) -> Self::Elem>(f: F) -> Self
       where Self: Sized;
    fn try_generate<E, F: FnMut(usize) -> Result<Self::Elem, E>>(
        f: F,
    ) -> Result<Self, E>
       where Self: Sized;
    fn generate_boxed<F: FnMut(usize) -> Self::Elem>(f: F) -> Box<Self>;
}

Extension trait for constant sized arrays.

Allows you to initialize an array like this:

use init_array::ArrayExt;

let arr: [usize; 5] = <[usize; 5]>::generate(|i| i * i);
assert_eq!(arr, [0, 1, 4, 9, 16]);

let arr: Box<[usize; 5]> = <[usize; 5]>::generate_boxed(|i| i * i);
assert_eq!(arr, Box::new([0, 1, 4, 9, 16]));

Required Associated Types

type Elem

Required Methods

fn generate<F: FnMut(usize) -> Self::Elem>(f: F) -> Self

where Self: Sized,

fn try_generate<E, F: FnMut(usize) -> Result<Self::Elem, E>>( f: F, ) -> Result<Self, E>

where Self: Sized,

fn generate_boxed<F: FnMut(usize) -> Self::Elem>(f: F) -> Box<Self>

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<T, const N: usize> ArrayExt for [T; N]

type Elem = T

fn generate<F: FnMut(usize) -> Self::Elem>(f: F) -> Self

where Self: Sized,

fn try_generate<E, F: FnMut(usize) -> Result<Self::Elem, E>>( f: F, ) -> Result<Self, E>

where Self: Sized,

fn generate_boxed<F: FnMut(usize) -> Self::Elem>(f: F) -> Box<Self>

Implementors