src/test/ui/proc-macro/auxiliary/nonterminal-recollect-attr.rs

   1 // force-host
   2 // no-prefer-dynamic
   3
   4 #![crate_type = "proc-macro"]
   5 #![feature(proc_macro_quote)]
   6
   7 extern crate proc_macro;
   8 use proc_macro::{TokenStream, quote};
   9
  10 #[proc_macro_attribute]
  11 pub fn first_attr(_: TokenStream, input: TokenStream) -> TokenStream {
  12     let recollected: TokenStream = input.into_iter().collect();
  13     println!("First recollected: {:#?}", recollected);
  14     quote! {
  15         #[second_attr]
  16         $recollected
  17     }
  18 }
  19
  20 #[proc_macro_attribute]
  21 pub fn second_attr(_: TokenStream, input: TokenStream) -> TokenStream {
  22     let recollected: TokenStream = input.into_iter().collect();
  23     println!("Second recollected: {:#?}", recollected);
  24     TokenStream::new()
  25 }