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Effectful | Paweł Szulc | Lambda Days 2022
3 projects | reddit.com/r/haskell | 13 Dec 2022
Details are in https://github.com/hasura/eff/issues/12 and https://www.reddit.com/r/haskell/comments/pywuqg/unresolved_challenges_of_scoped_effects_and_what/.
Looking for languages that combine algebraic effects with parallel execution
4 projects | reddit.com/r/ProgrammingLanguages | 25 Oct 2022
You'll get fearless parallel with STM in the mixture, and GHC is getting a work in progress effect system for Haskell, as Delimited continuation primops has been merged.
Should I pick up OCaml or Haskell?
3 projects | reddit.com/r/functionalprogramming | 24 Aug 2022
My last example is algebraic effects, some of which have been made possible in a both practical and efficient way thanks to extremely recent research, and that I can use to implement architectures like Ports and Adapters or Clean Architecture and have very maintainable code. (Extensible Effects — An Alternative to Monad Transformers was published in 2013, Effect Handlers in Scope was published in 2014 and they are behind Polysemy, while there is ongoing work on effects with even better performance, like Eff)
[ANN] cleff - fast and consise extensible effects
2 projects | reddit.com/r/haskell | 30 Jan 2022
cleff's Eff monad is esentially implemented as a ReaderT IO. [...] This is first done by eff, [...]
Opinions on Reader + Continuation-based IO?
3 projects | reddit.com/r/haskell | 1 Dec 2021
Here is link number 1 - Previous text "eff"3 projects | reddit.com/r/haskell | 1 Dec 2021
This is essentially how continuation based effect systems work, check out eveff and eff.
Where's more discussion of the designs of effect systems?
4 projects | reddit.com/r/ProgrammingLanguages | 17 Nov 2021
Languages such as Koka only support algebraic effects, not scoping operations such as catch and listen. The Effect Handlers in Scope paper introduces scoping operations, which lead to the Haskell libraries fused-effects and polysemy, but they turned out to have some weird semantics. eff is her effort to fix that.4 projects | reddit.com/r/ProgrammingLanguages | 17 Nov 2021
While her eff is still under construction, there are relative more mature pieces like Koka etc. I'd very much like to understand how her concerns map to those other effect systems, but can't find more write-ups about the design space of effect systems.
The Problem of Effects (2020)
5 projects | news.ycombinator.com | 27 Aug 2021
Let me tell you what I'm worried about with effects systems: One of the smartest people I know of has a library called Eff https://github.com/hasura/eff that efficiently implements effects through some modifications to GHC. The thing is, she's pretty much stopped working on because she found some really nasty semantic edge-cases that she couldn't resolve to her satisfaction. (I don't understand the problems well enough to describe them, and I think they're specific to lazy languages, but it has left me cautious about the effect model in general.)
A solid GUI Framework for Haskell?
8 projects | reddit.com/r/haskell | 27 Jun 2021
Why do you need a GUI library, if you can write your application using extensible effects frameworks, just choose any and enjoy!
What are some alternatives?
ether - Monad Transformers and Classes
freer-simple - A friendly effect system for Haskell
control-monad-exception - Explicitly Typed exceptions as a library
atl - Arrow Transformer Library
effect-monad - Provides 'graded monads' and 'parameterised monads' to Haskell, enabling fine-grained reasoning about effects.
MonadRandom - A monad transformer and corresponding type class for computations which consume random values.
fused-effects - A fast, flexible, fused effect system for Haskell
freer-effects - An implementation of "Freer Monads, More Extensible Effects".
frp-zoo - Comparing many FRP implementations by reimplementing the same toy app in each.