1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
use primitives::{Component, Id, Valid};
use downcast::Downcast;
use std::any::Any;
// ++++++++++++++++++++ StoreBase ++++++++++++++++++++
pub trait StoreBase: Any + Send + Sync {
type Id: Id;
fn len(&self) -> usize;
fn is_assigned<'id>(&self, id: Valid<'id, Self::Id>) -> bool;
fn assign_cloned<'id>(
&mut self,
dest: Valid<'id, Self::Id>,
src: Valid<'id, Self::Id>,
) -> bool;
/// A variant of `.release(id)` which drops the returned component.
/// Returns `true` if sucessful.
fn release_drop<'id>(&mut self, id: Valid<'id, Self::Id>) -> bool;
fn clear(&mut self);
}
impl<ID: Id, T: StoreBase<Id = ID>> Downcast<T> for StoreBase<Id = ID> {
impl_downcast_items!(T);
}
impl<ID: Id> StoreBase<Id = ID> {
downcast_method_items!();
}
impl<S: StoreBase + ?Sized> StoreBase for Box<S> {
type Id = S::Id;
fn len(&self) -> usize { (**self).len() }
fn is_assigned<'id>(&self, id: Valid<'id, Self::Id>) -> bool { (**self).is_assigned(id) }
fn assign_cloned<'id>(
&mut self,
dest: Valid<'id, Self::Id>,
src: Valid<'id, Self::Id>,
) -> bool {
(**self).assign_cloned(dest, src)
}
fn release_drop<'id>(&mut self, id: Valid<'id, Self::Id>) -> bool { (**self).release_drop(id) }
fn clear(&mut self){ (**self).clear() }
}
// ++++++++++++++++++++ ComponentStore ++++++++++++++++++++
/// Workaround for lack of HK-lifetimes.
pub trait _ComponentStore<'a>: StoreBase {
type _Component: Component;
type Components: Iterator<Item = &'a Self::_Component> + 'a;
type ComponentsMut: Iterator<Item = &'a mut Self::_Component> + 'a;
}
pub trait ComponentStore: StoreBase
where Self: for<'a> _ComponentStore<'a, _Component = <Self as ComponentStore>::Component>
{
type Component: Component;
fn assign<'id, T>(&mut self, id: Valid<'id, Self::Id>, com: T) -> Option<Self::Component>
where T: Into<Self::Component>;
fn release<'id>(&mut self, id: Valid<'id, Self::Id>) -> Option<Self::Component>;
/// Returns `None` if `id` is not assigned.
fn get<'id>(&self, id: Valid<'id, Self::Id>) -> Option<&Self::Component>;
/// Returns `None` if `id` is not assigned.
fn get_mut<'id>(&mut self, id: Valid<'id, Self::Id>) -> Option<&mut Self::Component>;
fn components<'a>(&'a self) -> <Self as _ComponentStore<'a>>::Components;
fn components_mut<'a>(&'a mut self) -> <Self as _ComponentStore<'a>>::ComponentsMut;
}
/// Workaround for lack of HK-lifetimes.
pub trait _ComponentStoreIter<'a>: _ComponentStore<'a> {
type Iter: Iterator<Item = (Valid<'a, Self::Id>, &'a Self::_Component)> + 'a;
type IterMut: Iterator<Item = (Valid<'a, Self::Id>, &'a mut Self::_Component)> + 'a;
}
pub trait ComponentStoreIter: ComponentStore
where Self: for<'a> _ComponentStoreIter<'a>
{
fn iter<'a>(&'a self) -> <Self as _ComponentStoreIter<'a>>::Iter;
fn iter_mut<'a>(&'a mut self) -> <Self as _ComponentStoreIter<'a>>::IterMut;
}
/* NOTE: old code
pub trait SecondaryIdStoreTypes<'a, C: Id>: StoreBase {
/// Some store-types don't store the primary-id themselves; for these the first
/// tuple element will always yield `None`.
type Iter: Iterator<Item = (Option<Valid<'a, Self::Id>>, Self::Output)>;
/// Some store-types don't store the primary-id themselves; for these the first
/// tuple element will always yield `None`.
type IterMut: Iterator<Item = (Option<Valid<'a, Self::Id>>, &'a mut C)> = IterMutDummy<(Option<Valid<'a, Self::Id>>, &'a mut C)>;
}
pub trait SecondaryIdStore<C>: ComponentStore<C>
where C: Id, Self: for<'a> ComponentStoreComponents<'a, C, Output = C>
{
fn validate(&self, m_id: C) -> Option<Valid<Self::Id>>;
fn invalidate(&mut self, id: C) -> Option<Valid<Self::Id>>;
/// Generates a new id and activates it for `p_id`.
fn generate_for<'id>(
&mut self,
p_id: Valid<'id, Self::Id>
) -> IdGenerationResult<C>;
fn activate_for<'id>(
&mut self,
p_id: Valid<'id, Self::Id>,
m_id: C,
) -> IdActivationResult<(), (C, Self::Id)>;
/// TODO should this return `(C, Valid<Self::Id>)`?
///
/// TODO should `id` be `usize`?
fn slot_of(&mut self, m_id: C) -> Option<(C, Self::Id)>;
}
*/