Trait enum_iterator::IntoEnumIterator

pub trait IntoEnumIterator: Sized {
    type Iterator: Iterator<Item = Self> + ExactSizeIterator + FusedIterator + Copy;

    const VARIANT_COUNT: usize;

    fn into_enum_iter() -> Self::Iterator;
}

Trait to iterate over the variants of a field-less enum.

Field-less (a.k.a. C-like) enums are enums whose variants don’t have additional data.

This trait is meant to be derived.

Example

use enum_iterator::IntoEnumIterator;

#[derive(Clone, IntoEnumIterator, PartialEq)]
enum Direction { North, South, West, East }

fn main() {
    assert_eq!(Direction::VARIANT_COUNT, 4);
    assert!(Direction::into_enum_iter().eq([Direction::North,
        Direction::South, Direction::West, Direction::East].iter()
        .cloned()));
}

Associated Types

type Iterator: Iterator<Item = Self> + ExactSizeIterator + FusedIterator + Copy

Type of the iterator over the variants.

Associated Constants

const VARIANT_COUNT: usize

Number of variants.

Required methods

fn into_enum_iter() -> Self::Iterator

Returns an iterator over the variants.

Variants are yielded in the order they are defined in the enum.

Implementors