Trait IndexedEnum 

pub trait IndexedEnum:
    Sized
    + Sealed
    + 'static {
    const VARIANTS: &'static [Self];

    // Required method
    fn as_index(&self) -> usize;
}

Trait for enums that have fixed indexed variants.

Required Associated Constants

const VARIANTS: &'static [Self]

A slice containing all the variants in index order.

The exact value is subject to change in any future release.

Required Methods

fn as_index(&self) -> usize

Returns this variant’s unique zero-based index.

The index satisfies 0 <= self.as_index() < Self::VARIANTS.len().

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.

Implementors

impl IndexedEnum for Category

const VARIANTS: &'static [Category]

impl IndexedEnum for Reason

const VARIANTS: &'static [Reason]