| // Copyright 2016 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 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| macro_rules! parallel { |
| ( |
| // If future has `pred`/`moelarry` fragments (where "pred" is |
| // "like expr, but with `{` in its FOLLOW set"), then could |
| // use `pred` instead of future-proof erroring here. See also: |
| // |
| // https://github.com/rust-lang/rfcs/pull/1384#issuecomment-160165525 |
| for $id:ident in $iter:expr { //~ WARN `$iter:expr` is followed by `{` |
| $( $inner:expr; )* |
| } |
| ) => {}; |
| } |
| |
| |
| fn main() { |
| parallel! { |
| for i in 0..n { |
| x += i; //~ ERROR no rules expected the token `+=` |
| } |
| } |
| } |
