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typenum_uuid_derive/
lib.rs

1use proc_macro::TokenStream;
2use quote::quote;
3use syn::{DeriveInput, parse_macro_input};
4
5#[proc_macro_derive(TypeId)]
6pub fn hello_world_derive(input: TokenStream) -> TokenStream {
7    let input = parse_macro_input!(input as DeriveInput);
8    let name = input.ident;
9
10    let expanded = quote! {
11        impl typenum_uuid_trait::TypeId for #name {
12            type Id = typenum_uuid::uuid_new_v4!();
13        }
14    };
15
16    TokenStream::from(expanded)
17}