undefined | Better HN

0 pointsDSMan1952764y ago0 comments

> If you want to write unsafe code, I think that's perfectly fine, but Rust is not going to cater to your desires. C and C++ will give you the tools you need with the conveniences you want.

This is a bit of a odd suggestion to me, honestly, you're basically saying Rust is not intended to be a C/C++ replacement. There is definitely a reality that not everything can be written in completely safe Rust, and a lot of the places that Rust could be the most beneficial (Ex. Linux Kernel) are going to require using it.

0 comments

ivraatiems4y ago

Calling Rust "a C/C++ replacement" is, I think, slightly underselling what it's supposed to do. As I understand it, the goal of Rust is more "take all these things that were historically hard to do safely and make them easier to do safely" than "replace C/C++ 1 for 1".

DSMan195276OP4y ago

Is it actually achieving that goal though if the advice is "use C if you have to do `unsafe` stuff"? That's really my point. IMO the language was always intended to be able to be used in any situation C is used (with maybe a few exceptions), which includes situations where `unsafe` is necessary.

smoldesu4y ago

For starters, the example I gave (Actix framework) had no such situations where unsafe code was imperative to having it function. That's where the drama originated from there.

Secondly, I don't think the goal of Rust is to rewrite the entire kernel (or replace C/C++ for that matter). Rust is optimized around writing ergonomic, safe code. It's compiler is designed to produce high-performance binaries with minimal UB. Sure, they could designate a team for making the unsafe Rust experience better, but why bother? C++ already does that and does it well. The idea of "oxidation", or slowly replacing safety-critical portions of a program in Rust, doesn't necessitate fully replacing any of the languages that came before it, and while there are situations where unsafe code is undeniably necessary, I don't really think there's much of a reason to replace C or C++ for those uses. Any of the replacements you could write in Rust wouldn't be ergonomic, easy to read or well optimized.

1 more reply

j / k navigate · click thread line to collapse