src/test/run-pass/let-var-hygiene.rs

   1 // Copyright 2012 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 // shouldn't affect evaluation of $ex:
  12 macro_rules! bad_macro {
  13     ($ex:expr) => ({let _x = 9; $ex})
  14 }
  15
  16 pub fn main() {
  17     let _x = 8;
  18     assert_eq!(bad_macro!(_x),8)
  19 }