1 // revisions:cfail1 cfail2
2 //[cfail1] compile-flags: --crate-type=lib --edition=2021 -Zassert-incr-state=not-loaded
3 //[cfail2] compile-flags: --crate-type=lib --edition=2021 -Zassert-incr-state=loaded
7 use core::marker::PhantomData;
9 struct DerefWrap<T>(T);
11 impl<T> core::ops::Deref for DerefWrap<T> {
13 fn deref(&self) -> &Self::Target {
18 struct Storage<T, D> {
19 phantom: PhantomData<(T, D)>,
22 type ReadStorage<T> = Storage<T, DerefWrap<MaskedStorage<T>>>;
32 impl Component for Pos {
33 type Storage = VecStorage;
36 struct GenericComp<T> {
40 impl<T: 'static> Component for GenericComp<T> {
41 type Storage = VecStorage;
44 pos_interpdata: ReadStorage<GenericComp<Pos>>,
50 fn run(data: Self::SystemData, any: Box<dyn Any>);
56 type SystemData = (ReadData, ReadStorage<Pos>);
58 fn run((data, pos): Self::SystemData, any: Box<dyn Any>) {
59 <ReadStorage<GenericComp<Pos>> as SystemData>::setup(any);
61 ParJoin::par_join((&pos, &data.pos_interpdata));
73 impl<'a, T, D> ParJoin for &'a Storage<T, D>
76 D: core::ops::Deref<Target = MaskedStorage<T>>,
81 impl<A, B> ParJoin for (A, B)
88 pub trait SystemData {
89 fn setup(any: Box<dyn Any>);
92 impl<T: 'static> SystemData for ReadStorage<T>
96 fn setup(any: Box<dyn Any>) {
97 let storage: &MaskedStorage<T> = any.downcast_ref().unwrap();
99 <dyn Any as CastFrom<MaskedStorage<T>>>::cast(&storage);
103 pub struct MaskedStorage<T: Component> {
107 pub unsafe trait CastFrom<T> {
108 fn cast(t: &T) -> &Self;
111 unsafe impl<T> CastFrom<T> for dyn Any
115 fn cast(t: &T) -> &Self {