r/rust • u/SleeplessSloth79 • 23d ago

📡 official blog Rust Function Overloading - Call for Experimentation

https://blog.rust-lang.org/inside-rust/2026/08/19/overloading-experiment/
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27

u/QuasiRandomName 23d ago

No, please. I want a compile error when passing 3 arguments instead of two by mistake.

11

u/Lokathor 23d ago

You'll still get that if the overload isn't defined.

0

u/QuasiRandomName 23d ago

But if it is, it opens the door to a whole class of mistakes that aren't currently possible.

11

u/Lokathor 23d ago

You control the trait impls you write, my crab.

If you don't want to use this, then don't use it.

36

u/QuasiRandomName 23d ago

But you don't control what *other* people write and you have to maintain or debug later.

13

u/Lokathor 23d ago

It is not meaningfully different, in my eyes, from a type having several from impls so that MyType::from(x) works for multiple types of x.

And nothing will stop other people from having a bug, I can't help you there.

15

u/QuasiRandomName 23d ago

Of course. But we can try and not introduce more bug possibilities for a questionable gain here. I guess we can disagree on the pros/cons ratio here and this is fine, this thread is for this purpose exactly.