Trait StaticIndex 

pub trait StaticIndex: 'static + Index<Size = ()> {
    const ALL: &'static [Self];

    // Required method
    fn to_usize(self) -> usize;

    // Provided method
    fn from_usize(index: usize) -> Self { ... }
}

Implemented by types that can be used as an index for an Array and where the size of the Array is a compile-time constant.

Required Associated Constants

const ALL: &'static [Self]

The (compile-time constant) complete list of Selfs.

Required Methods

fn to_usize(self) -> usize

Returns the index in ALL of Self.

Provided Methods

fn from_usize(index: usize) -> Self

Equivalent to, but often more efficient than, ALL[index].

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 StaticIndex for bool

const ALL: &'static [Self]

fn to_usize(self) -> usize

fn from_usize(index: usize) -> Self

impl StaticIndex for ()

const ALL: &'static [Self]

fn to_usize(self) -> usize

fn from_usize(_: usize) -> Self

Implementors