2 releases
Uses old Rust 2015
0.1.2 | Sep 11, 2017 |
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0.1.1 | Sep 10, 2017 |
#23 in #downcast
Used in 2 crates
8KB
160 lines
Set of downcasting matching macros akin to what Scala's match or Haskell's case can do. Useful in actor models etc.
let a = Box::new(5_i32) as Box<Any>;
let b = match_downcast!(a, {
x: i32 => x
y: f32 => x as i32,
z: () => -1,
_ => panic!()
});
assert_eq!(b, 5);