eff
fusedeffects
eff  fusedeffects  

18  3  
546  636  
0.0%  0.3%  
0.0  4.5  
about 1 year ago  4 months ago  
Haskell  Haskell  
ISC License  BSD 3clause "New" or "Revised" License 
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eff

Haskellers who moved to Rust: What has been your experience?
You can swapout implementations for testing, avoid the crazy N^2 instances issues, etc. They're pretty cool. Currently there are many competing libraries. polysemy and eff both have good examples on their homepages.

What are the current hot topics in type theory and static analysis?
Effect systems and Algebraic effects. ocaml has just released a strippeddown effect system. People are also working on Effect systems for Haskell (eff, fusedeffects, effet). Koka is a language built with effects first and foremost and itâ€™s rapidly gaining popularity. Unison also has effects.

[ANNOUNCE] GHC 9.6.1 is now available
There are also a few subtle issues that arise with delconts related to semantics of higher order effects (see here and here), but they might be solvable.

Effectful  PaweÅ‚ Szulc  Lambda Days 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
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?
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 â€” 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
cleff's Eff monad is esentially implemented as a ReaderT IO. [...] This is first done by eff, [...]

Opinions on Reader + Continuationbased IO?
Here is link number 1  Previous text "eff"

Where's more discussion of the designs of effect systems?
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 fusedeffects and polysemy, but they turned out to have some weird semantics. eff is her effort to fix that.

Languages that don't support ErrorCatching as a Control Structure?
There are a few languages that have algebraic effect systems, most notably Haskell, but these systems are implemented as libraries, not baked into the language (which can have advantages and disadvantages).
fusedeffects

Where's more discussion of the designs of effect systems?
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 fusedeffects and polysemy, but they turned out to have some weird semantics. eff is her effort to fix that.
 Haskell doesn't make sense without pure functions
 Monthly Hask Anything (June 2021)
What are some alternatives?
freersimple  A friendly effect system for Haskell
polysemy  :gemini: higherorder, noboilerplate monads
frpzoo  Comparing many FRP implementations by reimplementing the same toy app in each.
eveff  Efficient Haskell effect handlers based on evidence translation.
inotherwords  A higherorder effect system where the sky's the limit
controlmonadfree  Free monads and monad transformers
extensibleeffects  Extensible Effects: An Alternative to Monad Transformers
controlmonadexception  Explicitly Typed exceptions as a library
mtlstyleexample  A small example of using mtl style to unit test effectful code
ghc  Mirror of the Glasgow Haskell Compiler. Please submit issues and patches to GHC's Gitlab instance (https://gitlab.haskell.org/ghc/ghc). First time contributors are encouraged to get started with the newcomers info (https://gitlab.haskell.org/ghc/ghc/wikis/contributing).