Shapeless VS Chimney

Compare Shapeless vs Chimney and see what are their differences.

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Shapeless Chimney
8 5
3,245 854
- 1.1%
7.8 0.0
6 days ago about 1 month ago
Scala Scala
Apache License 2.0 Apache License 2.0
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

Shapeless

Posts with mentions or reviews of Shapeless. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-11-22.
  • Fp libraries that target scala 3 exclusively?
    5 projects | reddit.com/r/scala | 22 Nov 2021
    I know that libraries like Scodec and shapeless were rewritten practically from scratch for Scala 3, taking advantage of the next syntax and internals, as well as protoquill - a Scala 3 implementation of Quill.
  • Delphi 11 Alexandria Has Been Released
    4 projects | reddit.com/r/programming | 23 Sep 2021
    please show me something like this: https://akka.io/ or this: https://zio.dev/ or this: https://github.com/milessabin/shapeless
  • 6 Years of Professional Clojure
    6 projects | news.ycombinator.com | 2 Aug 2021
    That largely depends on the type system. Languages like Haskell and Scala which have much more powerful type systems than C/Java/Go/etc absolutely do allow you to do those sorts of things. It is a bit harder to wrap your head around to be sure and there are some rough edges, but once you get the hang of it you can get the benefits of static typing with the flexibility of dynamic typing. See https://github.com/milessabin/shapeless or a project that I've been working on a lot lately https://github.com/zio/zio-schema.
  • Scala3: Does it provide a simplified way of doing n-term generic parameters?
    2 projects | reddit.com/r/scala | 6 Jun 2021
    Just use cats and use the apply syntax .mapN for this. Seriously. There isn't a way to do it without generating source code that I can see in the api. Scala 3's HList Tuples aren't like Shapeless 2's HLists and I can't figure out a way in the api to reduce the tuple members down from (A, B, C, D) into an E, generically, yet with Scala 3 poly functions, unlike what you could do in Shapeless 2 with HList
  • Scala: A Love Story
    4 projects | dev.to | 21 Apr 2021
    Scala has sparked a huge ecosystem of very high quality libraries (Cats, Scalaz, shapeless, to name but a few). I think a major reason for this is that Scala attracts developers who value the advantages of the JVM, but are fed up with the limitations of the Java programming language and understand the benefits of an expressive type system and functional programming.
  • Jam 0.0.4 got Scala 3 support
    3 projects | reddit.com/r/scala | 17 Apr 2021
    I also investigated shapeless3 macroses: https://github.com/milessabin/shapeless/tree/shapeless-3/modules, but they are more about derivation than reflection. And probably that is all I found.
  • [Scala3] Get the type of container with wildcard type (i.e. List[?])
    1 project | reddit.com/r/scala | 1 Mar 2021
    Well, that is sometimes possible, depending on a structure of Foo. If you have a List, for instance, you can iterate every element, and if every element is A, then it's safe to cast a list to List[A]. In fact, shapeless provides exactly that, in form of Typeable[List[A]], in a more generic form. I suppose shapeless also can derive a typeable instance for you, but I haven't dug into scala 3 version of it.
  • Why Learn Haskell?
    2 projects | news.ycombinator.com | 1 Mar 2021
    I'm not sure where is the line between extensive and basic knowledge. Here is my more detailed exposure:

    In commercial context:

    * Of strongly typed ones only Scala (with [shapeless]). Can reluctantly throw in Kotlin as well for it's amazing structured concurrency.

    In non-commercial context:

    * Went through a few chapters of [Software Foundations] doing Coq proofs.

    * Worked through most of the [Types and Programming Languages] (writing typecheckers in Ocaml)

    * 3 services in Haskell (1 on Scotty, 2 on Servant). Loved persistent+esqueleto for the ORM layer, disliked Opaleye.

    * 2 projects in PureScript (1 with Halogen, 1 with React bindings).

    * 1 project in ReasonML (Ocaml).

    -

    > I am afraid there is no way back for me

    I see where you are coming from. In my case I can alternate between "I want all invariants properly expressed and checked" and "I just want to ship that barely-working piece of junk and iterate on it". I learned to adjust depending on organization needs. IMO, for many orgs, especially startups/scaleups, the latter is often the more fitting way. With that in mind, I'm willing to trade the guiding hand of great type systems for other productivity aspects (amazing runtime and cohesive web framework in Elixir's case).

    [shapeless]: https://github.com/milessabin/shapeless

    [Software Foundations]: https://softwarefoundations.cis.upenn.edu/

    [Types and Programming Languages]: https://www.cis.upenn.edu/~bcpierce/tapl/

Chimney

Posts with mentions or reviews of Chimney. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-01-20.
  • Is it possible to get runnable generated scala code from a macro (chminey to be specific)?
    2 projects | reddit.com/r/scala | 20 Jan 2022
    I want to upgrade one project to Scala 3.1, but I'm using the macro heavy chimney (https://github.com/scalalandio/chimney) to reduce the boilerplate, which is not available for Scala 3 yet. My idea was to copy and paste the code that chimney generates on 2.13, and after that uncomment the uses of chimney for now.
  • From ES6 to Scala: Basics
    9 projects | news.ycombinator.com | 20 Jan 2022
    In my $dayjob we originally used Scala, but I pushed for a couple of new services to be written in TypeScript/Node as it was really hard to hire Scala developers. I'd say it worked well, we even took a somewhat functional approach to building things. We tried fp-ts but that was a bit hardcore (when you are trying to hire TypeScript developers who don't know functional programming), so just built Either and Option types which provided 99% of what we needed.

    There are still a few things I miss though:

    * Pattern matching and exhaustive checking. Using a switch statement it is possible to define a function that can emulate the compile-time exhaustive checking, but it's still rather weak compared to what you can do in Scala.

    * Implicits. Being able to define something that can convert say a UUID to a String or vice versa automatically just feels like magic, especially when dealing with data from third party systems.

    * Compiler macros and metaprogramming. It enables tools like Chimney (https://scalalandio.github.io/chimney/) to be built, which I don't think are possible with TypeScript right now.

  • Scala Type Classes from Scratch
    1 project | reddit.com/r/scala | 18 Jun 2021
    Converting between these classes can add some boilerplate, but luckily there are libraries like https://github.com/scalalandio/chimney that make it much easier.
  • Ideas for a Scala 3 MapStruct library?
    5 projects | reddit.com/r/scala | 1 May 2021
    Hi! Are you aware of https://github.com/scalalandio/chimney? I think that's what you are trying to do. Sorry if I misunderstand your message.
  • Circe is driving me insane
    1 project | reddit.com/r/scala | 16 Jan 2021
    You might think that this looks like more boilerplate, however: 1. You only have to write these conversions once. 2. There are libraries that makes this precise case easier, such as https://github.com/scalalandio/chimney

What are some alternatives?

When comparing Shapeless and Chimney you can also consider the following projects:

cats - Lightweight, modular, and extensible library for functional programming.

Monocle - Optics library for Scala

magnolia - Easy, fast, transparent generic derivation of typeclass instances

Scalaz - Principled Functional Programming in Scala

scala-newtype - NewTypes for Scala with no runtime overhead

scala.meta - Library to read, analyze, transform and generate Scala programs

Enumeratum - A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations.

Lamma - Lamma schedule generator for Scala is a professional schedule generation library for periodic schedules like fixed income coupon payment, equity deravitive fixing date generation etc.

Scala Graph - Graph for Scala is intended to provide basic graph functionality seamlessly fitting into the Scala Collection Library. Like the well known members of scala.collection, Graph for Scala is an in-memory graph library aiming at editing and traversing graphs, finding cycles etc. in a user-friendly way.

ScalaTest - A testing tool for Scala and Java developers