shipyard/
contains.rs

1use crate::component::Component;
2use crate::entity_id::EntityId;
3use crate::sparse_set::SparseSet;
4use crate::tracking::Tracking;
5use crate::views::{View, ViewMut};
6
7/// Checks if an entity has some components.
8pub trait Contains {
9    /// Returns true if all storages contains `entity`.
10    fn contains(&self, entity: EntityId) -> bool;
11}
12
13impl<'a: 'b, 'b, T: Component, Track: Tracking> Contains for &'b View<'a, T, Track> {
14    fn contains(&self, entity: EntityId) -> bool {
15        SparseSet::contains(self, entity)
16    }
17}
18
19impl<'a: 'b, 'b, T: Component, Track: Tracking> Contains for &'b ViewMut<'a, T, Track> {
20    fn contains(&self, entity: EntityId) -> bool {
21        SparseSet::contains(&**self, entity)
22    }
23}
24
25impl<'a: 'b, 'b, T: Component, Track: Tracking> Contains for &'b mut ViewMut<'a, T, Track> {
26    fn contains(&self, entity: EntityId) -> bool {
27        SparseSet::contains(&**self, entity)
28    }
29}
30
31macro_rules! impl_contains {
32    ($(($type: ident, $index: tt))+) => {
33        impl<$($type: Contains),+> Contains for ($($type,)+) {
34            fn contains(&self, entity: EntityId) -> bool {
35                $(self.$index.contains(entity))&&+
36            }
37        }
38    }
39}
40
41macro_rules! contains {
42    ($(($type: ident, $index: tt))+; ($type1: ident, $index1: tt) $(($queue_type: ident, $queue_index: tt))*) => {
43        impl_contains![$(($type, $index))*];
44        contains![$(($type, $index))* ($type1, $index1); $(($queue_type, $queue_index))*];
45    };
46    ($(($type: ident, $index: tt))+;) => {
47        impl_contains![$(($type, $index))*];
48    }
49}
50
51#[cfg(not(feature = "extended_tuple"))]
52contains![(ViewA, 0); (ViewB, 1) (ViewC, 2) (ViewD, 3) (ViewE, 4) (ViewF, 5) (ViewG, 6) (ViewH, 7) (ViewI, 8) (ViewJ, 9)];
53#[cfg(feature = "extended_tuple")]
54contains![
55    (ViewA, 0); (ViewB, 1) (ViewC, 2) (ViewD, 3) (ViewE, 4) (ViewF, 5) (ViewG, 6) (ViewH, 7) (ViewI, 8) (ViewJ, 9)
56    (ViewK, 10) (ViewL, 11) (ViewM, 12) (ViewN, 13) (ViewO, 14) (ViewP, 15) (ViewQ, 16) (ViewR, 17) (ViewS, 18) (ViewT, 19)
57    (ViewU, 20) (ViewV, 21) (ViewW, 22) (ViewX, 23) (ViewY, 24) (ViewZ, 25) (ViewAA, 26) (ViewBB, 27) (ViewCC, 28) (ViewDD, 29)
58    (ViewEE, 30) (ViewFF, 31)
59];
shipyard/contains.rs

shipyard/
contains.rs
