28 lines
739 B
Rust
28 lines
739 B
Rust
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use proc_macro::TokenStream;
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use quote::quote;
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use syn::{ItemStruct, parse_macro_input};
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#[proc_macro_attribute]
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pub fn log_id(_attr: TokenStream, item: TokenStream) -> TokenStream {
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let input = parse_macro_input!(item as ItemStruct);
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let struct_name = &input.ident;
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let generics = &input.generics;
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// This is the important part
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let (impl_generics, type_generics, where_clause) = generics.split_for_impl();
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let struct_name_str = struct_name.to_string();
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let expanded = quote! {
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#input
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impl #impl_generics #struct_name #type_generics #where_clause {
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#[allow(unused)]
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pub const ID: &'static str = #struct_name_str;
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}
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};
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TokenStream::from(expanded)
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}
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