tests/ui/auxiliary/proc_macro_derive.rs

   1 // compile-flags: --emit=link
   2 // no-prefer-dynamic
   3
   4 #![crate_type = "proc-macro"]
   5 #![feature(repr128, proc_macro_quote)]
   6 #![allow(incomplete_features)]
   7 #![allow(clippy::eq_op)]
   8
   9 extern crate proc_macro;
  10
  11 use proc_macro::{quote, TokenStream};
  12
  13 #[proc_macro_derive(DeriveSomething)]
  14 pub fn derive(_: TokenStream) -> TokenStream {
  15     // Shound not trigger `used_underscore_binding`
  16     let _inside_derive = 1;
  17     assert_eq!(_inside_derive, _inside_derive);
  18
  19     let output = quote! {
  20         // Should not trigger `useless_attribute`
  21         #[allow(dead_code)]
  22         extern crate rustc_middle;
  23     };
  24     output
  25 }