rust/tests/pretty/auxiliary/derive-foo.rs

//@ force-host
//@ no-prefer-dynamic

#![crate_type = "proc-macro"]

extern crate proc_macro;

use proc_macro::TokenStream;

#[proc_macro_derive(Foo, attributes(Bar))]
pub fn derive(input: TokenStream) -> TokenStream {
    "".parse().unwrap()
}