uwui/dsl/src/derive/custom_component.rs

use proc_macro::TokenStream;
use quote::quote;
use syn::{parse_macro_input, DeriveInput};

pub fn invoke(input: TokenStream) -> TokenStream {
    let input = parse_macro_input!(input as DeriveInput);
    let name = input.ident;

    let expanded = quote! {
        #[automatically_derived]
        impl<B: crate::backend::Backend>
        crate::view::custom::CustomComponent<B> for #name
        {}

        #[automatically_derived]
        impl<B: crate::backend::Backend>
        crate::view::Construct<B> for #name
        {
            type Params = <Self as crate::view::custom::NewCustom<B>>::Params;

            fn construct(params: Self::Params) -> Self {
                <Self as crate::view::custom::NewCustom<B>>::new(params)
            }

            fn into_view(self) -> crate::view::SomeView<B> {
                crate::view::SomeView::<B>::Custom(Box::new(self))
            }
        }

        #[automatically_derived]
        impl<B: crate::backend::Backend>
        crate::view::ConstructGroup<B> for #name
        where
            #name : crate::view::custom::NewCustomGroup<B>,
        {
            fn construct_group<'a, I>(params: Self::Params, children: I) -> Self
            where
                I: Iterator<Item = &'a crate::view::View<B>>,
            {
                <Self as crate::view::custom::NewCustomGroup<B>>::new_group(params, children)
            }
        }
    };
    expanded.into()
}