[Haskell-cafe] dumping ByteArray#

[Viktor Dukhovni]

On Sat, Mar 29, 2025 at 11:25:17AM +0900, Kazu Yamamoto (山本和彦) via Haskell-Cafe wrote:

> For debugging, I need to dump the inside of `ByteArray#`.
> Are there any utility functions for this purpose?

The `SBS` pattern in `Data.ByteString.Short.Internal` wraps up
a `ByteArray#` as `ShortByteString`.

    $ ghci
    GHCi, version 9.8.1: https://www.haskell.org/ghc/  :? for help
    Loaded GHCi configuration from /home/viktor/.ghc/ghci.conf
    λ> import Data.ByteString.Short.Internal
    λ> :info SBS
    pattern SBS :: GHC.Prim.ByteArray# -> ShortByteString
            -- Defined in ‘Data.ByteString.Short.Internal’
    λ>

What sort of "dump" did you have in mind?  A hexadecimal encoding?
Something else?

-- 
    Viktor.