|9 days ago||about 1 month ago|
|Apache License 2.0||Apache License 2.0|
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The case against Effect Systems (e.g., the IO data type)
2 projects | reddit.com/r/scala | 18 Oct 2022
Hmm, you can write direct-style code with monad: https://github.com/rssh/dotty-cps-async allows this, exists support libraries exist for near all well-known effect systems: https://github.com/rssh/cps-async-connect, so you can use async/await with IO/ZIO the same as with Future. Although in IO style, any operation that mutates state is async, it's hard to write code where you should place `await` near each line. And it looks like automatic coloring is a too radical change of concepts for most functional programmers. The option to allow using <- in the direct style may be more popular, but this requires changes to the scala core. Another question - are we need effective systems to be present in each program in industrial-style development? Here I agree that mostly no.
New Scala 3 Codebases
6 projects | reddit.com/r/scala | 17 Feb 2022
Dotty-cps-async 0.9.7 is released.
4 projects | reddit.com/r/scala | 26 Jan 2022
This is a generic async/await transformer for scala3 which allows using effectful monads in the direct style. URL: (https://github.com/rssh/dotty-cps-async )
2 projects | reddit.com/r/ProgrammingLanguages | 14 Jul 2021
dotty-cps-async [rssh/dotty-cps-async ] with automatic coloring do something very similar in two steps. Automatic coloring defines implicit conversion F[A] => A as x => await(x)(m). The compiler inserts those awaits inside async blocks and then eliminates them later via cps-transform. Exists some limitations which we need to add for effect monads like IO (we don't want run effect twice and don't want to screw semantics of effects by extra memoizing). So, if your language has a possibility to implement effect monads, then you need a possibility to restrict using Flattenable.
We haven't tracked posts mentioning scala-3-migration-guide yet.
Tracking mentions began in Dec 2020.
What are some alternatives?
Scalafix - Refactoring and linting tool for Scala
scala3-example-project - An example sbt project that compiles using Dotty
functional-way - Write small programs (eg -algorithms) in a functional way.
Rx.NET - The Reactive Extensions for .NET
scalaprops - property based testing library for Scala
jsoniter-scala - Scala macros for compile-time generation of safe and ultra-fast JSON codecs
scala-3-crash-course - Scala 3 workshop presenting the top new features of the language.
iron - Strong type constraints for Scala
libretto - Declarative concurrency and stream processing library for Scala
scala-gopher - Implementation of CSP constructions (Communication Sequence Process, i.e. go-like channels) in scala