1extern crate proc_macro;
2
3mod expand;
4
5use proc_macro::TokenStream;
6use quote::quote;
7use syn::parse::Nothing;
8use syn::{DeriveInput, parse_macro_input};
9
10#[proc_macro_attribute]
11pub fn embed(args: TokenStream, tokens: TokenStream) -> TokenStream {
12 let original = tokens.clone();
13 parse_macro_input!(args as Nothing);
14 let input = parse_macro_input!(tokens as DeriveInput);
15
16 expand::embed(input)
17 .unwrap_or_else(|e| {
18 let original = proc_macro2::TokenStream::from(original);
19 let compile_error = e.to_compile_error();
20 quote! {
21 #original
22 #compile_error
23 }
24 })
25 .into()
26}