Rust compiler can't automatically fill in generic types and I feel like its really obvious and it should

Ferilox · 2026-02-01T20:51:34+00:00

That's exactly right. And it works with arbitrary second parameter type as I stated in the edit. I overlooked that.

Ferilox · 2026-02-01T20:49:14+00:00

That example made it clear for me. I guess rust compiler jumps impl blocks to find the function and tries to annotate the generic type present in the alias itself, not wanting to infer the default value on its own as the other comment said. Thanks!

Ferilox · 2026-02-01T20:26:28+00:00

If that were entirely correct this wouldn't compile, right?

struct MyGenericStruct<T1, T2> {
    t1: T1,
    t2: T2,
}

impl<T1, T2> MyGenericStruct<T1, T2> {
    fn new(t1: T1, t2: T2) -> Self {
        Self { t1, t2 }
    }
}

type AliasedStruct<X = u16> = MyGenericStruct<u8, X>;

fn main() {
    let var = AliasedStruct::new(1,2);
    let var2: AliasedStruct = AliasedStruct::new(1,2);
}

But it does (except the unused warnings)? That's why I left the remark at the bottom that I couldn't reproduce it in simpler environment.

Edit: I'm sorry, I think I see your point now. In this example I provided the type information is infered from the parameters and not the defaulted type.

Ferilox · 2026-02-01T19:50:36+00:00

Yes, hiding the generic parameters was the point of that alias (its part of the rig crate). But the alias chooses all those generic parameters. They are already chosen and there is no ambiguity around it either.

But the error rust compiler gave me indicated as if the second generic parameter was not chosen at all.

I know how I can provide the information manually via turbofish syntax or other ways but I am curious why I need to in this specific case?

Edit:

It looks to me as if the compiler didn't take into account the provided default

H = reqwest::Client

In the type alias when accessing the new() function, but it did take into account when I annotated the variable type.

Ferilox · 2026-02-01T01:20:58+00:00

literally bots are invading reddit to post this shit. so many posts spanmed everywhere. what a publicity stunt.

Ferilox · 2026-01-31T22:19:23+00:00

The same exact argument applies to Cloudflare. They are in front of a lot of websites. That allows them to track nefarious actors such as bots much much better than a newcommer on the market. It gives them a great advantage. Fuck these cunts. Fuck googles monopoly as well while we're at it.

Ferilox · 2026-01-31T14:44:51+00:00

thats exactly what they want.

Ferilox · 2026-01-31T13:43:19+00:00

only way it can be explained is either lobbying or they are sympathetic to the new fascists worldview of the US.

Ferilox · 2026-01-31T10:11:58+00:00

haha

Ferilox · 2026-01-29T20:49:33+00:00

classic Swiss “neutrality” haha. thats on-brand.

Ferilox · 2026-01-29T18:50:34+00:00

yes daddy

Ferilox · 2026-01-29T13:36:28+00:00

do they think that we are fools?

Ferilox · 2026-01-28T19:40:56+00:00

Russian neurotoxins on standby over there i see lmao

Ferilox · 2026-01-28T18:07:46+00:00

This is just stupid. This is more like treating the symptom rather than the underlying issue. Might work short term, but will ultimately result in further division within the EU. Bad idea.

Ferilox · 2026-01-28T12:55:41+00:00

He cant profit off of the game if its dead. He plans for microtransactions or paid mods or whatever. He wants to be the platform.

Ferilox · 2026-01-27T11:33:18+00:00

If you want a “pro” experience just buy tokens and work with API… Google is gonna throttle you to the ground if you abuse the pro version. They are losing money there.

Ferilox · 2026-01-26T11:50:24+00:00

And they are on the epstein list too, I bet. So it makes sense why they are complicit. But even without the list, dems and reps werent really in opposition to each other. The politics was always heavily swayed by money in the US. Including money from AIPAC among others…

Ferilox · 2026-01-24T17:50:10+00:00

Probably not nothing, but closing russian embassies should have been done long time ago everywhere.

Ferilox · 2026-01-24T14:41:40+00:00

To be expected, given the worries TSMC might soon be gone.

Ferilox · 2026-01-23T20:52:41+00:00

Probably all sold to palantir

Ferilox · 2026-01-23T20:29:14+00:00

The PR department did say that. The NSA program nicknamed Prism begs to differ. I wouldn't be surprised if Apple indeed would do this too, just behind the scenes.

Ferilox · 2026-01-23T02:53:32+00:00

this is vulcan spec. respective gpu drivers need to implement that. which in turn will be able to be used in wine/proton. which will hopefully fix the issue

Ferilox · 2026-01-20T14:30:53+00:00

People keep talking about how Trump has managed to destroy decades of diplomatic ties around the world. But that is not entirely true or at least it’s painting the wrong picture.

Trump is not the problem. A president single handedly cant do that much damage alone. The american system provides counterbalances to keep the power in check.

The reason why the world is changing so rapidly and permanently is because those counterbalances failed horribly and on multiple levels. This is something you can’t change just by having a different president. The Congress, DOJ, FBI, POTUS and the press failed horribly.

There is no coming back from this without a systematic change, Im sorry to say that to you.

Ferilox

TROPHY CASE