How to use the compact regions API to write a compact to a file?

Dear devs, I have been under the impression for a while that you can write a compact region to a file and the functions in GHC.Compact.Serialized also seem to suggest this is possible. https://hackage.haskell.org/package/ghc-compact-0.1.0.0/docs/GHC-Compact-Ser... It seems like there are some functions missing from the API. There is "importCompactByteStrings" but no function in the API which produces ByteStrings. So in order to use this function you have to convert a SerializedCompact into a ByteString, but in what specific way? Has anyone got any code where they have tried to do this? Cheers, Matt

Hi Matthew,
It's possible to use Data.Compact.Serialize to write a compact to a
file or read it back. Directly serializing via ByteStrings has also
been discussed before, see link below. Hope this helps!
https://hackage.haskell.org/package/compact
https://github.com/ezyang/compact/issues/3
On Fri, May 22, 2020 at 1:32 PM Matthew Pickering
Dear devs,
I have been under the impression for a while that you can write a compact region to a file and the functions in GHC.Compact.Serialized also seem to suggest this is possible.
https://hackage.haskell.org/package/ghc-compact-0.1.0.0/docs/GHC-Compact-Ser...
It seems like there are some functions missing from the API. There is "importCompactByteStrings" but no function in the API which produces ByteStrings. So in order to use this function you have to convert a SerializedCompact into a ByteString, but in what specific way?
Has anyone got any code where they have tried to do this?
Cheers,
Matt _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs

Ah thanks, those links are useful. I was looking in `ghc-compact` not
in the `compact` library.
Cheers,
Matt
On Fri, May 22, 2020 at 12:51 PM Shao, Cheng
Hi Matthew,
It's possible to use Data.Compact.Serialize to write a compact to a file or read it back. Directly serializing via ByteStrings has also been discussed before, see link below. Hope this helps!
https://hackage.haskell.org/package/compact https://github.com/ezyang/compact/issues/3
On Fri, May 22, 2020 at 1:32 PM Matthew Pickering
wrote: Dear devs,
I have been under the impression for a while that you can write a compact region to a file and the functions in GHC.Compact.Serialized also seem to suggest this is possible.
https://hackage.haskell.org/package/ghc-compact-0.1.0.0/docs/GHC-Compact-Ser...
It seems like there are some functions missing from the API. There is "importCompactByteStrings" but no function in the API which produces ByteStrings. So in order to use this function you have to convert a SerializedCompact into a ByteString, but in what specific way?
Has anyone got any code where they have tried to do this?
Cheers,
Matt _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
participants (2)
-
Matthew Pickering
-
Shao, Cheng