fromsoftware_dlrf_derive/
lib.rs

1use proc_macro::TokenStream;
2use quote::quote;
3use syn::{ItemStruct, LitStr};
4
5#[proc_macro_attribute]
6pub fn singleton(args: TokenStream, input: TokenStream) -> TokenStream {
7    let input_struct: ItemStruct = syn::parse_macro_input!(input as ItemStruct);
8    let input_struct_ident = input_struct.ident.clone();
9    let dlrf_name = syn::parse_macro_input!(args as LitStr).value();
10
11    TokenStream::from(quote! {
12        #input_struct
13
14        impl ::dlrf::DLRFSingleton for #input_struct_ident {
15            const DLRF_NAME: &'static str = #dlrf_name;
16        }
17    })
18}