[Mesa-dev] Rust drivers in Mesa
Volker Weißmann
volker.weissmann at gmx.de
Sat Oct 3 15:40:21 UTC 2020
> 2. Rust's enums look awesome but are only mostly awesome:
> a. Pattern matching on them can lead to some pretty deep
> indentation which is a bit annoying.
> b. There's no good way to have multiple cases handled by the same
> code like you can with a C switch; you have to either repeat it or
> break it out into a generic helper.
Do you know that you can use "|" for having multiple cases handled by the same code?
enum MyEnum {
A,
B,
C
}
fn main() {
let val = MyEnum::A;
match val {
MyEnum::A | MyEnum::B => {println!("case A or case B");},
MyEnum::C => {println!("case C");}
}
}
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