shipyard 0.11.2

Entity Component System
Documentation 
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use core::any::type_name;
use shipyard::error;
use shipyard::*;

#[derive(Debug, PartialEq, Eq)]
struct U32(u32);
impl Component for U32 {
    type Tracking = track::Untracked;
}

#[test]
fn no_pack() {
    #[derive(Debug, PartialEq, Eq)]
    struct USIZE(usize);
    impl Component for USIZE {
        type Tracking = track::Untracked;
    }

    let world = World::new();
    let (mut entities, mut usizes, mut u32s) = world
        .borrow::<(EntitiesViewMut, ViewMut<USIZE>, ViewMut<U32>)>()
        .unwrap();

    let entity1 = entities.add_entity((&mut usizes, &mut u32s), (USIZE(0), U32(1)));
    let entity2 = entities.add_entity((&mut usizes, &mut u32s), (USIZE(2), U32(3)));
    drop((entities, usizes, u32s));

    let mut all_storages = world.borrow::<AllStoragesViewMut>().unwrap();
    assert!(all_storages.delete_entity(entity1));
    assert!(!all_storages.delete_entity(entity1));
    drop(all_storages);

    let (usizes, u32s) = world.borrow::<(View<USIZE>, View<U32>)>().unwrap();
    assert_eq!(
        (&usizes).get(entity1),
        Err(error::MissingComponent {
            id: entity1,
            name: type_name::<USIZE>(),
        })
    );
    assert_eq!(
        (&u32s).get(entity1),
        Err(error::MissingComponent {
            id: entity1,
            name: type_name::<U32>(),
        })
    );
    assert_eq!(usizes.get(entity2), Ok(&USIZE(2)));
    assert_eq!(u32s.get(entity2), Ok(&U32(3)));
}

#[test]
fn update() {
    #[derive(Debug, PartialEq, Eq)]
    struct USIZE(usize);
    impl Component for USIZE {
        type Tracking = track::Untracked;
    }

    let world = World::new();
    let (mut entities, mut usizes) = world.borrow::<(EntitiesViewMut, ViewMut<USIZE>)>().unwrap();
    usizes.track_all();

    let entity1 = entities.add_entity(&mut usizes, USIZE(0));
    let entity2 = entities.add_entity(&mut usizes, USIZE(2));
    drop((entities, usizes));

    let mut all_storages = world.borrow::<AllStoragesViewMut>().unwrap();
    assert!(all_storages.delete_entity(entity1));
    assert!(!all_storages.delete_entity(entity1));
    drop(all_storages);

    let usizes = world.borrow::<ViewMut<USIZE, track::All>>().unwrap();
    assert_eq!(
        (&usizes).get(entity1),
        Err(error::MissingComponent {
            id: entity1,
            name: type_name::<USIZE>(),
        })
    );
    assert_eq!(usizes.get(entity2), Ok(&USIZE(2)));
    assert_eq!(usizes.removed().count(), 0);
    assert_eq!(
        usizes.deleted().collect::<Vec<_>>(),
        vec![(entity1, &USIZE(0))]
    );
}

#[test]
fn on_deletion() {
    use std::sync::{
        atomic::{AtomicU64, Ordering},
        Arc,
    };

    let mut world = World::new();

    let entity = world.add_entity(());

    let captured_entity = Arc::new(AtomicU64::new(123));
    let captured_entity_clone = captured_entity.clone();

    world.on_deletion(move |eid| {
        captured_entity_clone.store(eid.inner(), Ordering::Relaxed);
    });

    world.delete_entity(entity);

    assert_eq!(
        captured_entity.load(Ordering::Relaxed),
        EntityId::new_from_index_and_gen(0, 0).inner()
    );
}