Struct NONE

pub struct NONE<T>(/* private fields */);

Usable to do [None::<T>; LEN] when T is non-Copy.

As of Rust 1.65.0, [None::<T>; LEN] is not valid for non-Copy types, but [CONST; LEN] does work, like in the example below.

Example

use konst::option::NONE;

use std::mem::{self, MaybeUninit};

const TEN: [Option<String>; 10] = [NONE::V; 10];

let ten = [NONE::<String>::V; 10];

// the `vec` macro only needs `Option<String>` to be clonable, not Copy.
assert_eq!(vec![None::<String>; 10], TEN);

assert_eq!(vec![None::<String>; 10], ten);

Implementations

impl<T> NONE<T>

pub const V: Option<T> = None

The value that this constructs.