Are conversions using 'as' bad practice? | Rust Programming Language Community | Page 1

plush crater Jul 17, 2022, 7:20 AM

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I remember about reading that somewhere a few days ago, claiming try_into() should always be used instead. Is it the case?

amber aurora Jul 17, 2022, 7:26 AM

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Usually it leads to more bug-proof code because it helps detect conversion errors

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as can silently result in lossy conversions

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Which you might not want

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There is also .into() if the type can always losslessly convert

plush crater Jul 17, 2022, 7:27 AM

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so I guess I should prioritize those before using as

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thanks a lot!

amber aurora Jul 17, 2022, 7:28 AM

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It would be good practice, yeah

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Sometimes as is fine, but if you want to prioritize correctness, you should try to use Into/TryInto as often as possible

plush crater Jul 17, 2022, 7:29 AM

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alright, great

tranquil gazelle Jul 17, 2022, 9:11 AM

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FYI: If you use an as, and it may result in a lossy conversation, I believe the compiler flags it up with a warning...

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Given, as only works for primatives as well,

amber aurora Jul 17, 2022, 9:21 AM

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The lint isn't enabled by default, I think

sour gazelle Jul 17, 2022, 1:31 PM

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it isn't

#Are conversions using 'as' bad practice?