nya_ecs/
component.rs

1//! Components
2use crate::{Any, TypeId};
3
4/// A component that can be attached to an entity in a [crate::World]
5pub trait Component: Send + Sync + 'static {}
6
7/// [Box] wrapper for [Component]s
8pub type ComponentBox = Box<dyn Any + Send + Sync + 'static>;
9
10/// An identifier for a component
11#[derive(Clone, PartialEq, Eq, Hash)]
12pub struct ComponentKey {
13    type_id: TypeId,
14}
15
16impl ComponentKey {
17    /// Get the component key of a type
18    pub fn of<T: Component>() -> Self {
19        Self {
20            type_id: TypeId::of::<T>(),
21        }
22    }
23
24    /// Get a component key from a value
25    pub fn from_value<T: Component>(value: &T) -> Self {
26        Self {
27            type_id: value.type_id(),
28        }
29    }
30}
31
32/// Get the [ComponentKey] of a component type, can accept either a type or an expression
33#[macro_export]
34macro_rules! component_id {
35    ($type: ty) => {
36        $crate::ComponentKey::of::<$type>()
37    };
38
39    ($value: expr) => {
40        $crate::ComponentKey::from_value($value)
41    };
42}
43
44/// Implement [Component] for `type`
45#[macro_export]
46macro_rules! component {
47    ($type: ty) => {
48        impl $crate::Component for $type {}
49    };
50}
51
52/// A bundle of components
53pub trait Bundle {
54    /// Convert into a vector of [ComponentBox]
55    fn into_boxes(self) -> Vec<(ComponentKey, ComponentBox)>;
56}
57
58impl<T: Component> Bundle for T {
59    fn into_boxes(self) -> Vec<(ComponentKey, ComponentBox)> {
60        vec![(ComponentKey::of::<Self>(), Box::new(self))]
61    }
62}
63
64macro_rules! bundle_tuple_impl {
65    ($($key: tt => $name: ident),*) => {
66        impl<$($name: $crate::Component),*> Bundle for ($($name,)*) {
67            fn into_boxes(self) -> Vec<(ComponentKey, ComponentBox)> {
68                vec![
69                    $((ComponentKey::of::<$name>(), Box::new(self.$key))),*
70                ]
71            }
72        }
73    }
74}
75
76bundle_tuple_impl!(0 => A);
77bundle_tuple_impl!(0 => A, 1 => B);
78bundle_tuple_impl!(0 => A, 1 => B, 2 => C);
79bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D);
80bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D, 4 => E);
81bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D, 4 => E, 5 => F);
82bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D, 4 => E, 5 => F, 6 => G);
83bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D, 4 => E, 5 => F, 6 => G, 7 => H);
84bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D, 4 => E, 5 => F, 6 => G, 7 => H, 8 => I);
85bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D, 4 => E, 5 => F, 6 => G, 7 => H, 8 => I, 9 => J);
86bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D, 4 => E, 5 => F, 6 => G, 7 => H, 8 => I, 9 => J, 10 => K);
87bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D, 4 => E, 5 => F, 6 => G, 7 => H, 8 => I, 9 => J, 10 => K, 11 => L);
88bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D, 4 => E, 5 => F, 6 => G, 7 => H, 8 => I, 9 => J, 10 => K, 11 => L, 12 => M);
89bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D, 4 => E, 5 => F, 6 => G, 7 => H, 8 => I, 9 => J, 10 => K, 11 => L, 12 => M, 13 => N);
90bundle_tuple_impl!(0 => A, 1 => B, 2 => C, 3 => D, 4 => E, 5 => F, 6 => G, 7 => H, 8 => I, 9 => J, 10 => K, 11 => L, 12 => M, 13 => N, 14 => O);
nya_ecs/component.rs

nya_ecs/
component.rs
