1use quote::quote;23pub(crate) fn impl_abi_macro(ast: &syn::DeriveInput) -> proc_macro2::TokenStream {4 5 let name = &ast.ident;6 let can_be_plcaed_in_vec = impl_can_be_placed_in_vec(name);7 let abi_type = impl_abi_type(ast);8 println!("{}", abi_type);9 quote! {10 #can_be_plcaed_in_vec11 #abi_type12 }13}1415fn impl_can_be_placed_in_vec(ident: &syn::Ident) -> proc_macro2::TokenStream {16 quote! {17 impl ::evm_coder::abi::sealed::CanBePlacedInVec for #ident {}18 }19}2021fn impl_abi_type(ast: &syn::DeriveInput) -> proc_macro2::TokenStream {22 let name = &ast.ident;23 let (fields, params_count) = match &ast.data {24 syn::Data::Struct(ds) => match ds.fields {25 syn::Fields::Named(ref fields) => (26 fields.named.iter().map(|field| &field.ty),27 fields.named.len(),28 ),29 syn::Fields::Unnamed(_) => todo!(),30 syn::Fields::Unit => unimplemented!("Unit structs not supported"),31 },32 syn::Data::Enum(_) => unimplemented!("Enums not supported"),33 syn::Data::Union(_) => unimplemented!("Unions not supported"),34 };3536 let mut params_signature = {37 let fields = fields.clone();38 quote!(39 #(nameof(<#fields as ::evm_coder::abi::AbiType>::SIGNATURE) fixed(","))*40 )41 };42 if params_count > 0 {43 params_signature.extend(quote!(shift_left(1)))44 };4546 let fields_for_dynamic = fields.clone();4748 quote! {49 impl ::evm_coder::abi::AbiType for #name {50 const SIGNATURE: ::evm_coder::custom_signature::SignatureUnit = ::evm_coder::make_signature!(51 new fixed("(")52 #params_signature53 fixed(")")54 );55 fn is_dynamic() -> bool {56 false57 #(58 || <#fields_for_dynamic as ::evm_coder::abi::AbiType>::is_dynamic()59 )*60 }61 fn size() -> usize {62 0 #(+ <#fields as ::evm_coder::abi::AbiType>::size())*63 }64 }65 }66}