id_sys 0.1.0

Provides data structures which can be marked such that they only work with similarly marked integer data types.
Documentation 
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use crate::{id_slice, tests::util::MTest, usize_id as id, IdSlice};
use std::ops::{Index, IndexMut};

#[test]
fn get_test() {
    let range = id!(MTest; 0)..=id!(MTest; 1);
    let id_slice = id_slice![MTest; 1, 2, 3, 4];

    let actual = id_slice.get(range);
    let expected = Some(id_slice![MTest; 1, 2]);
    assert_eq!(actual, expected);
}

#[test]
fn get_mut_test() {
    let range = id!(MTest; 0)..=id!(MTest; 1);
    let mut slice = [1, 2, 3, 4];
    let id_slice = IdSlice::from_mut_slice(&mut slice);

    let actual = id_slice.get_mut(range);
    let mut expected = [1, 2];
    let expected = Some(IdSlice::from_mut_slice(&mut expected));
    assert_eq!(actual, expected);
}

#[test]
fn index_test() {
    let range = id!(MTest; 0)..=id!(MTest; 1);
    let id_slice = id_slice![MTest; 1, 2, 3, 4];

    let actual = id_slice.index(range);
    let expected = id_slice![MTest; 1, 2];
    assert_eq!(actual, expected);
}

#[test]
fn index_mut_test() {
    let range = id!(MTest; 0)..=id!(MTest; 1);
    let mut slice = [1, 2, 3, 4];
    let id_slice = IdSlice::from_mut_slice(&mut slice);

    let actual = id_slice.index_mut(range);
    let mut expected = [1, 2];
    let expected = IdSlice::from_mut_slice(&mut expected);
    assert_eq!(actual, expected);
}