On Friday, 21 October 2016 at 02:40:45 UTC, Stefan Koch wrote:
On Friday, 21 October 2016 at 02:16:44 UTC, Chris M. wrote:
So I know you can do some pattern matching with templates in
D, but has there been any discussion about implementing it as
a language feature, maybe something similar to Rust's match
keyword (https://doc.rust-lang.org/stable/book/patterns.html)?
What would your guys' thoughts be?
How is this diffrent from "switch-case" ?
switch is a statement, rusts match is an expression and can
return a value.
i posted this[1] templates a while ago with which you can
probably do most of what rust can do with the match expressing
(not tested havent looked into rust much and pattern matching
isnt the main purpose of them), by combining existing D features.
e.g.
5.call!(a => a == 3? "three" :
a == 5? "five" : "nomatch").writeln;
prints:
five
5.call!((a){ a == 3? "three".writeln :
a == 5? "five".writeln : null;}).writeln;
prints:
five
5
[1] http://melpon.org/wandbox/permlink/ngUYhp7SS6uY283b
