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reflex-platform
A curated package set and set of tools that let you build Haskell packages so they can run on a variety of platforms. reflex-platform is built on top of the nix package manager.
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reflex
Interactive programs without callbacks or side-effects. Functional Reactive Programming (FRP) uses composable events and time-varying values to describe interactive systems as pure functions. Just like other pure functional code, functional reactive code is easier to get right on the first try, maintain, and reuse. (by reflex-frp)
At least /u/patrl has done a roguelike in it https://github.com/patrl/hackcell.
The type classes do take a toll on performance, but in reflex-platform we change GHC's default flags to make the situation a lot better. It's still not ideal, but our performance winds up being OK for real applications. The most important part is that the performance scales reasonably well as the application grows. It might probably be good at some point to use backpack instead of a typeclass so that specialization can be enforced - though I'd prefer if GHC gave a way to just force specialization more effectively.
Now, I've been convinced to take another look at reflex. This quick reference seems very useful, most other resources seem to always discuss reflex-dom specifically. I'm not really interested in that.