Trait FromIndex

pub trait FromIndex<const DIM: usize> {
    // Required method
    fn from_index(index: [usize; DIM]) -> Self;
}

A convenience trait to allow extending FunVec implementations.

A struct implementing FromIndex<DIM> can be created from [usize; DIM], such as:

• usize, (usize), [usize; 1] implement FromIndex<1>, and hence, can be created from [usize; 1];
• (usize, usize), [usize; 2] implement FromIndex<2>, and hence, can be created from [usize; 2];
• …

Required Methods

fn from_index(index: [usize; DIM]) -> Self

Converts the index [usize; DIM] into value.

Example

use orx_funvec::*;

let index = [2];
let i = usize::from_index(index);
assert_eq!(i, 2);

let index = [3, 4];
let (i, j) = <(usize, usize)>::from_index(index);
assert_eq!(i, 3);
assert_eq!(j, 4);

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 FromIndex<DIM> for (usize, usize)

fn from_index(index: [usize; 2]) -> Self

impl FromIndex<DIM> for (usize, usize, usize)

fn from_index(index: [usize; 3]) -> Self

impl FromIndex<DIM> for (usize, usize, usize, usize)

fn from_index(index: [usize; 4]) -> Self

impl FromIndex<DIM> for usize

fn from_index(index: [usize; 1]) -> Self

impl<const DIM: usize> FromIndex<DIM> for [usize; DIM]

fn from_index(index: [usize; DIM]) -> Self

Implementors