magma_ecs_macros 0.5.0

Magma-ECS Macros
Documentation 
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use proc_macro::TokenStream;
use quote::quote;

#[proc_macro_derive(Component)]
pub fn component_derive(input: TokenStream) -> TokenStream {
    let ast = syn::parse(input).unwrap();
    impl_component(&ast)
}

fn impl_component(ast: &syn::DeriveInput) -> TokenStream {
    let name = &ast.ident;
    let generated = quote! {
        impl Component for #name {
            fn as_any(&self) -> &dyn std::any::Any {
                self
            }

            fn as_any_mut(&mut self) -> &mut dyn std::any::Any {
                self
            }
        }
    };

    generated.into()
}