Monthly Ask Anything (July 2023)

kleidukos, 1 year ago (edited 1 year ago)

Why must FinalizerPtr take a foreign function that uses the ccall calling convention? Is there a concrete thing preventing GHC from accepting capi?

glguy, 1 year ago

I suspect that comment predates the existence of capi and is trying to avoid having some other actual calling convention like stdcall because the function pointer is actually invoked from some C code in the RTS. capi is a sort of pseudo-calling-convention in that it generates some C code and then calls that stub.

Have you tried using a capi defined funptr there to see what happens?

kleidukos, 1 year ago

Thank you, that's indeed a reasonable suspicion. I haven't tried because this is for a PR that's been submitted to me and I actually have no idea how this could blow up in my face later (or even worse, not blow up an silently corrupt stuff)

kleidukos, 11 months ago

I have my answer: cAPI is fine: https://gitlab.haskell.org/ghc/ghc/-/issues/23599

someacnt, 11 months ago

Hello. I still cannot see this magazine from lemmy (specifically, sopuli.xyz). Does anyone know why? Is there a way I could fix this? Thank you!

jaror, 11 months ago

Strange. It does see https://sopuli.xyz/c/[email protected], but not https://sopuli.xyz/c/[email protected]

Maybe you can try reaching out to the admins as that error page suggests.

jaror, 11 months ago

I can see this magazine at https://lemmy.ml/c/[email protected], but not at https://sopuli.xyz/c/[email protected] or https://programming.dev/c/[email protected]. I wonder why.

someacnt, 11 months ago

I see, I will report soon. Could not find time to do so now, sadly

demesisx, 11 months ago

Sounds like that instance isn’t federated with kbin.social. I can see it just fine over here in infosec.pub

tfcmad, 11 months ago

Having learned Haskell in University, I’ve not yet used it in my role as a software developer.

What are the real world use cases for Haskell?

jaror, 11 months ago (edited 11 months ago)

I like to use https://www.libhunt.com/l/haskell to explore popular Haskell projects. The three projects with the most stars on GitHub are:

• ShellCheck, which checks shell scripts for potential problems
• Pandoc, which converts documents between different formats
• Postgrest, which serves a REST API from postgres databases

There's also the State of the Haskell Ecosystem page which rates the level of maturity of different use-cases and programming needs.