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Pitfalls of Safe Rust

(corrode.dev)
168 points pjmlp | 1 comments | 04 Apr 25 17:55 UTC | HN request time: 0.323s | source
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woah ◴[06 Apr 25 17:56 UTC] No.43603395[source]▶
Is "as" an uneccesary footgun?
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bigstrat2003 ◴[06 Apr 25 21:32 UTC] No.43605135[source]▶
I wouldn't say so. I quite like "as". It can have sharp edges but I think the language would be significantly worse off without it.
replies(2): >>43605381 #>>43605444 #
1. wongarsu ◴[06 Apr 25 22:19 UTC] No.43605444[source]▶
It's useful to have something that does the job of "as", but I dislike how the most dangerous tool for type conversions has the nicest syntax.

Most of the time I want the behavior of ".try_into().unwrap()" (with the compiler optimizing the checks away if it's always safe) or would even prefer a version that only works if the conversion is safe and lossless (something I can reason about right now, but want to ensure even after refactorings). The latter is really hard to achieve, and ".try_into.unwrap()" is 20 characters where "as" is 2. Not a big deal to type with autocomplete, but a lot of visual clutter.