T.to_bytes() without cloning the data? | Rust Programming Language Community | Page 1

untold shadow Nov 23, 2023, 1:46 PM

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i want to be able to convert a type to bytes and back but do it without cloning the data,what functions provide this?

cosmic turret Nov 23, 2023, 1:52 PM

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Not all types can be converted to bytes so you're gonna have to be more specific.

untold shadow Nov 23, 2023, 1:53 PM

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so any type that can

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like how would i convert i32 to a slice of bytes

cosmic turret Nov 23, 2023, 1:54 PM

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Any of the to_*_bytes functions.

honest dune Nov 23, 2023, 1:55 PM

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untold shadow like how would i convert i32 to a slice of bytes

who'd own the bytes?

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what endianness do you want the bytes to be?

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why are you doing this in the first place?

untold shadow Nov 23, 2023, 1:58 PM

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honest dune who'd own the bytes?

the one receiving the result of the to_bytes

honest dune Nov 23, 2023, 1:59 PM

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then it's not a slice

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to_*_bytes functions return arrays

untold shadow Nov 23, 2023, 2:00 PM

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i didnt mean specifically those functions

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just the function that can do that

honest dune Nov 23, 2023, 2:00 PM

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no function can do that

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what are you doing?

untold shadow Nov 23, 2023, 2:01 PM

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writing a db

cosmic turret Nov 23, 2023, 2:01 PM

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So... You want serialization?

untold shadow Nov 23, 2023, 2:01 PM

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idk what that means

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anyways even if it includes unsafe is there no way to turn a type to raw bytes without cloning it?

cosmic turret Nov 23, 2023, 2:05 PM

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What's wrong with the to_*_bytes functions

honest dune Nov 23, 2023, 2:05 PM

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?crate bytemuck

topaz owlBOT Nov 23, 2023, 2:05 PM

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bytemuck

A crate for mucking around with piles of bytes.

Version

1.14.0

Downloads

30 110 445

honest dune Nov 23, 2023, 2:05 PM

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?crate rkyv

topaz owlBOT Nov 23, 2023, 2:05 PM

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rkyv

Zero-copy deserialization framework for Rust

Version

0.7.42

Downloads

9 164 911

untold shadow Nov 23, 2023, 2:05 PM

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which one would you say is better?

cosmic turret Nov 23, 2023, 2:06 PM

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They are for different uses

untold shadow Nov 23, 2023, 2:07 PM

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thanks

honest dune Nov 23, 2023, 2:07 PM

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they're mostly for inspiration

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if you investigate fully what they offer then you will know a lot more how you want to approach your program

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but you might want to use them directly

untold shadow Nov 23, 2023, 2:14 PM

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so youre saying i should make my own implementation of them?

honest dune Nov 23, 2023, 2:15 PM

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not necessarily, but if you're gonna be writing a db engine you will probably eventually write your own serialization traits

#T.to_bytes() without cloning the data?