| // run-pass | |
| 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) | |
| } |