Macro components_arena::ComponentId

macro_rules! ComponentId {
    (
        ()
        $vis:vis struct $name:ident $($body:tt)*
    ) => { ... };
    (
        @struct [$vis:vis] [$name:ident] [$($g:tt)*] [$($r:tt)*] [$($w:tt)*]
        ($id:ty $(, $($phantom:ty),+ $(,)?)?);
    ) => { ... };
    (
        @struct [$vis:vis] [$name:ident] [$($g:tt)*] [$($r:tt)*] [$($w:tt)*]
        $($body:tt)*
    ) => { ... };
    (
        @impl [$vis:vis] [$name:ident] [$($g:tt)*] [$($r:tt)*] [$($w:tt)*]
        [$($phantom_args:tt)*]
        [$phantom:ty $(, $($other_phantoms:tt)+)?]
    ) => { ... };
    (
        @impl [$vis:vis] [$name:ident] [$($g:tt)*] [$($r:tt)*] [$($w:tt)*]
        [$($phantom_args:tt)*]
        []
    ) => { ... };
}

Macro attribute for deriving ComponentId trait.

Examples

use components_arena::{Component, Id, ComponentId};
use phantom_type::PhantomType;

macro_attr! {
    #[derive(ComponentId!)]
    #[derive(Educe)]
    #[educe(Debug, Copy, Clone, Eq, PartialEq, Hash, Ord, PartialOrd)]
    pub struct Item<Tag, X>(Id<ItemNode<Tag>>, PhantomType<X>);
}