this post was submitted on 15 May 2024
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Go vs Rust learning (programming.dev)
submitted 6 months ago by [email protected] to c/[email protected]
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[–] [email protected] 43 points 6 months ago (5 children)

Yeah but Go has the best error handling paradigm of any programming language ever created:

ret, err := do_thing()

if err != nil {
    return nil, err
}

Don't you just love doing that every 5 lines of code?

[–] [email protected] 6 points 6 months ago

I actually reasonably like Go. It's simple and pragmatic but I fucking loathe its error handling. To me it just replicates one of the worst features of C

[–] [email protected] 4 points 6 months ago* (last edited 6 months ago) (1 children)

I do think Zig is better for this kind of thing.

const ret = try do_thing();

if( ret ) | result | {
   do_something_with_result(result);
}

The try keyword returns any error up; the if-unwrap works with what came out of a successful call. Normally you wouldn’t have both, of course.

do_thing would be defined as a union of an error (a distinct kind of type, so it can be reasoned about with try, catch and unwrapping) and the wrapped return value.

[–] [email protected] 5 points 6 months ago (1 children)

That syntax looks atrocious

[–] [email protected] 2 points 6 months ago

Well, different floats for different boats I suppose.

[–] [email protected] 4 points 6 months ago (1 children)

I don't like the rust way either. But at least you can unwrap

[–] [email protected] 20 points 6 months ago (1 children)

With some sprinkle of libraries such as anyhow and thiserror the Rust errors become actually pleasant to use. The vanilla way is indeed painful when you start handling more than one type of error at a time.

[–] [email protected] 5 points 6 months ago

Exactly this. Anyhow makes error handling in rust actually a joy. It's only something you need to consider if you're writing a library for others to use, and in that case, it's good that rust forces you to be very very explicit

[–] [email protected] 2 points 6 months ago

Honestly, I do

[–] [email protected] -1 points 6 months ago

It's not pretty, but it's uniform, obvious, and easy to understand.

go is good grug friend who chase away complexity demon by limit damage of big brain developer