src/test/run-pass/macros/macro-deep_expansion.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // run-pass
  12
  13 macro_rules! foo2 {
  14     () => {
  15         "foo"
  16     }
  17 }
  18
  19 macro_rules! foo {
  20     () => {
  21         foo2!()
  22     }
  23 }
  24
  25 fn main() {
  26     assert_eq!(concat!(foo!(), "bar"), "foobar")
  27 }