xanadu 0.0.5

A toy ECS library
Documentation 
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

use super::{Component, Query, World};

mod private {
    pub trait Sealed<'world, Q, T> {}
}

/// Represents a system that can be executed on a world.
///
/// This trait is not meant to be implemented by the user. See Implementors section for types that
/// can be used as systems.
pub trait System<'world, Q, T>: private::Sealed<'world, Q, T>
where
    Q: Query<'world, T>,
{
    fn execute(&self, world: &'world mut World);
}

impl<'world, Q, C, F> private::Sealed<'world, Q, &'world C> for F
where
    C: Component,
    Q: Query<'world, &'world C>,
    F: Fn(&'world C),
{
}

impl<'world, Q, C, F> System<'world, Q, &'world C> for F
where
    C: Component,
    Q: Query<'world, &'world C>,
    F: Fn(&'world C),
{
    fn execute(&self, world: &'world mut World) {
        for component in Q::get_iterator(world) {
            self(component);
        }
    }
}

impl<'world, Q, C, F> private::Sealed<'world, Q, &'world mut C> for F
where
    C: Component,
    Q: Query<'world, &'world mut C>,
    F: Fn(&'world mut C),
{
}

impl<'world, Q, C, F> System<'world, Q, &'world mut C> for F
where
    C: Component,
    Q: Query<'world, &'world mut C>,
    F: Fn(&'world mut C),
{
    fn execute(&self, world: &'world mut World) {
        for component in Q::get_iterator(world) {
            self(component);
        }
    }
}