| // force-host |
| // no-prefer-dynamic |
| |
| #![crate_type = "proc-macro"] |
| #![feature(proc_macro_hygiene, proc_macro_quote)] |
| |
| extern crate proc_macro; |
| |
| use proc_macro::{TokenStream, quote}; |
| |
| // This macro is not very interesting, but it does contain delimited tokens with |
| // no content - `()` and `{}` - which has caused problems in the past. |
| // Also, it tests that we can escape `$` via `$$`. |
| #[proc_macro] |
| pub fn hello(_: TokenStream) -> TokenStream { |
| quote!({ |
| fn hello() {} |
| macro_rules! m { ($$($$t:tt)*) => { $$($$t)* } } |
| m!(hello()); |
| }) |
| } |