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use proc_macro2::TokenStream;
use quote::quote;
use synstructure::{decl_derive, Structure};

decl_derive!([DagCbor, attributes(ipld)] => dag_cbor_derive);

mod gen;

fn dag_cbor_derive(s: Structure) -> TokenStream {
    let write_cbor = gen::write_cbor(&s);
    let read_cbor = gen::read_cbor(&s);
    s.gen_impl(quote! {
        use libipld::cbor::IpldError;
        use libipld::cbor::{ReadCbor, WriteCbor, CborResult as Result};
        use libipld::cbor::encode::{write_u64, Write};
        use libipld::cbor::decode::{read_u8, read_key, Read};

        gen impl WriteCbor for @Self {
            #write_cbor
        }

        gen impl ReadCbor for @Self {
            #read_cbor
        }
    })
}

#[cfg(test)]
mod tests {
    #[test]
    fn test() {
        let t = trybuild::TestCases::new();
        t.pass("examples/basic.rs");
        t.pass("examples/name_attr.rs");
        //t.pass("examples/repr_attr.rs");
    }
}