src/tools/clippy/mini-macro/src/lib.rs

   1 #![feature(proc_macro, proc_macro_non_items)]
   2 extern crate proc_macro;
   3
   4 use proc_macro::{TokenStream, quote};
   5
   6 #[proc_macro_derive(ClippyMiniMacroTest)]
   7 pub fn mini_macro(_: TokenStream) -> TokenStream {
   8     quote!(
   9         #[allow(unused)] fn needless_take_by_value(s: String) { println!("{}", s.len()); }
  10     )
  11 }