// Copyright 2018 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // aux-build:issue-50061.rs // ignore-stage1 #![feature(proc_macro_path_invoc, decl_macro)] extern crate issue_50061; macro inner(any_token $v: tt) { $v } macro outer($v: tt) { inner!(any_token $v) } #[issue_50061::check] fn main() { //! this doc comment forces roundtrip through a string let checkit = 0; outer!(checkit); }