Coercing a `ByteArray#` into a `MutableByteArray#`

[Sam Derbyshire]

Indeed, this is what the `primitive` package provides to thaw a
`ByteArray#` without copying:

https://hackage.haskell.org/package/primitive-0.8.0.0/docs/src/Data.Primitive.ByteArray.html#unsafeThawByteArray

On Mon, 24 Jul 2023, 20:17 chessai, <chessai1996 at gmail.com> wrote:

> Hi Adithya,
>
> The representations are the same. You can do this. I do this somewhat
> often. Just avoid mutating in places where it could result in funky stuffs.
> This is usually pretty easy to spot.
>
> Cheers,
> chessai
>
> On Mon, Jul 24, 2023, 12:59 Adithya Kumar <adi.obilisetty at gmail.com>
> wrote:
>
>> Hello all,
>>
>> I have a use-case where I want to convert `ByteArray#` to
>> `MutableByteArray#`
>> without the copy overhead.
>>
>> Is the underlying memory structure of `ByteArray#` and
>> `MutableByteArray#` the
>> same?
>>
>> If I can guarantee that I won't mutate my `MutableByteArray#`, can I use
>> `unsafeCoerce#` on `ByteArray#` and treat it as `MutableByteArray#`?
>>
>> Best,
>> Adithya
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>>
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