// 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. // pretty-expanded FIXME #23616 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<uint>, { return Some(x); }, Some(8), Some(y), y) == 8) }