exceptions VS categories

Compare exceptions vs categories and see what are their differences.


mtl friendly exceptions (by ekmett)


categories from category-extras (by ekmett)
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exceptions categories
1 1
47 34
- -
0.0 0.0
about 2 months ago almost 4 years ago
Haskell Haskell
BSD 3-clause "New" or "Revised" License BSD 3-clause "New" or "Revised" License
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.


Posts with mentions or reviews of exceptions. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-03-21.
  • Async Control Flow
    7 projects | /r/haskell | 21 Mar 2021
    I see. Do you think rethrowing the original exception is the the right approach in all cases, or only in this case? In the documentation I wrote for the exceptions package, I recommend to let the release block's exceptions take priority, to match base's behavior. Should I recommend the opposite?


Posts with mentions or reviews of categories. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-05-16.

What are some alternatives?

When comparing exceptions and categories you can also consider the following projects:

either - the EitherT monad transformer

control-monad-exception - Explicitly Typed exceptions as a library

failure - A simple type class for success/failure computations.


hask - Category theory for Haskell with a lens flavor (you need GHC 7.8.3, not 7.8.2 to build this!)

cloud-haskell - This is an umbrella development repository for Cloud Haskell

apecs - a fast, extensible, type driven Haskell ECS framework for games

control-monad-omega - A Haskell monad for fair enumeration of infinite sets.

lens-tutorial - The missing tutorial module for the lens library

distributed-fork - A distributed data processing framework in Haskell.

funflow - Functional workflows