On 11/06/2015 18:48, Dennis Ritchie wrote:
On Thursday, 11 June 2015 at 17:41:49 UTC, Andrei Alexandrescu wrote:
It is possible that Walter and Andrei against macro because of this:
macro_rules! o_O {
(
$(
$x:expr; [ $( $y:expr ),* ]
);*
) => {
&[ $($( $x + $y ),*),* ]
}
}
fn main() {
let a: &[i32]
= o_O!(10; [1, 2, 3];
20; [4, 5, 6]);
assert_eq!(a, [11, 12, 13, 24, 25, 26]);
}
It looks disgusting! ;)
Is that actual Rust code that compiles and runs? -- Andrei
Yes, this code is working. I took it here:
https://doc.rust-lang.org/stable/book/macros.html#repetition
OMG, and it's not just an obscure example someone came up with, but
actually a snippet from the official documentation!
That said, it does look a bit less crazy when looking at it with the
syntax highlighting.
--
Bruno Medeiros
https://twitter.com/brunodomedeiros
