mccFeb 8

*rubbing eyes* Anyone use "Rocket"?

The worst/most Ruby-like thing about Rocket is when you return a value from a Route function, you just kinda return… whatever datatype you want, and Rocket figures it out.

Unless it doesn't, and you have *no* idea what to return.

For a string, you return a String.

What do I return for bytes? It's not a string, it's a &[u8; 1335895] and it's not valid UTF-8. Do I return a rocket::response::ByteStream? That seems to be the correct answer but doesn't work

Show threadmccFeb 8

In the docs, ByteStream has a generic argument. However the generic argument's meaning is not documented (it's just "S"). The documentation appears to suggest, rather than filling in this S, using a macro. The macro is not doing what I expect. https://api.rocket.rs/v0.5/rocket/response/stream/struct.ByteStream

I can't tell if Rocket has a specific place to go ask for support requests, unless it's the general Rust programming discord, or here.

ByteStream in rocket::response::stream - Rust

A potentially infinite stream of bytes: any `T: AsRef<[u8]>`.

Show threadmccFeb 8
Update: .to_slice() was the magic solution. I need to remember to put this in my "things to try at random when Rust isn't working" along with typing <'_>.
Show threadmccFeb 8
<'_> in Rust is the "Wink" operator. The compiler's like "You can't do that" and you're like "*Wink* Yeah, but you'll let it slide this time, right?"
Show threadRyan FinnieFeb 8
@mcc As someone who has never tried Rust, I honestly can't tell if you're joking or not.
Show threadmccFeb 8

@ryan This is literally a real thing in Rust but it's not called the wink operator. It does involve typing the characters <'_>.

Literally what it means: In Rust, every variable has a "lifetime" associated with it. Sometimes, you must explicitly tell the compiler what the lifetime is. But often, in this case, you can type <'_> which means "compiler, please figure out the lifetime for me". And often it succeeds.

Show threadJustin FitzsimmonsFeb 8
@mcc @ryan thanks to this post maybe it _is_ called the wink operator though?
Show threadmccFeb 8
@smn @ryan what have i done
Show threadsomeguyjg
@mcc @smn @ryan in kotlin the symbol ?: is called the Elvis operator in official documentation.
Feb 9 at 3:06pmWeb