| // Copyright 2012 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! overly_complicated { |
| ($fnname:ident, $arg:ident, $ty:ty, $body:block, $val:expr, $pat:pat, $res:path) => |
| ({ |
| fn $fnname($arg: $ty) -> Option<$ty> $body |
| match $fnname($val) { |
| Some($pat) => { |
| $res |
| } |
| _ => { panic!(); } |
| } |
| }) |
| |
| } |
| |
| pub fn main() { |
| assert!(overly_complicated!(f, x, Option<usize>, { return Some(x); }, |
| Some(8), Some(y), y) == 8) |
| |
| } |
