undefined | Better HN

0 pointsaldanor5y ago0 comments

Maybe read a bit on Deref: https://doc.rust-lang.org/std/ops/trait.Deref.html

Any time you have a &String reference, it triggers coercion to &str.

0 comments

Unfortunately that is not always the case. This fails to compile, for example (and is fairly irritating):

    let my_str = "Hello".to_owned();
    match &my_str {
        "Hello" => (),
        _ => ()
    }

glandium5y ago

try &*my_str

Measter5y ago

Yes, that's the trivial "fix" to make it work, but that's not my point. In most other similar situations the compiler does that for me, but not here. It feels like something the compiler should be doing, not me.

j / k navigate · click thread line to collapse

0 pointsaldanor5y ago0 comments

Maybe read a bit on Deref: https://doc.rust-lang.org/std/ops/trait.Deref.html

Any time you have a &String reference, it triggers coercion to &str.

0 comments

Measter5y ago

Unfortunately that is not always the case. This fails to compile, for example (and is fairly irritating):

    let my_str = "Hello".to_owned();
    match &my_str {
        "Hello" => (),
        _ => ()
    }

glandium5y ago

try &*my_str

Measter5y ago

j / k navigate · click thread line to collapse