Struct IndexGen

pub struct IndexGen<I> {
    count: AtomicUsize,
    _marker: PhantomData<I>,
}

A generator of fresh indices.

It can generate any index created with the newtype_index macro.

If you use more than one IndexGen uniqueness is only guaranteed for indices that come from the same generator.

Fields

count: AtomicUsize

_marker: PhantomData<I>

Implementations

impl<I: Idx> IndexGen<I>

pub fn new() -> Self

pub fn skipping(skip: usize) -> Self

pub fn fresh(&self) -> I

Generate a fresh index of type I.

newtype_index! {
    struct Idx {
        DEBUG_FORMAT = "idx_{}",
    }
}

let mut gen = IndexGen::new();
let idx1: Idx = gen.fresh();
let idx2: Idx = gen.fresh();
assert_ne!(idx1, idx2);

pub fn skip(&self, n: usize)

Skip n indices

Trait Implementations

impl<I: Idx> Default for IndexGen<I>

fn default() -> Self

Returns the “default value” for a type.