errorcall-eq-instance vs mtl

errorcall-eq-instance

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mtl

The Monad Transformer Library (by haskell)

Control Mtl Haskell monad-transformers Monad

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errorcall-eq-instance		mtl
	Project
-	Mentions	10
-	Stars	357
-	Growth	1.1%
-	Activity	0.0
-	Latest Commit	15 days ago
	Language	Haskell
MIT License	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.
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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.

errorcall-eq-instance

Posts with mentions or reviews of errorcall-eq-instance. We have used some of these posts to build our list of alternatives and similar projects.

We haven't tracked posts mentioning errorcall-eq-instance yet.
Tracking mentions began in Dec 2020.

mtl

Posts with mentions or reviews of mtl. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-10-31.

Deprecating Safe Haskell, or heavily investing in it?
1 project | /r/haskell | 28 Dec 2022

The most recent real case I remember is https://github.com/haskell/mtl/issues/110, which could ended badly.
Type class subsets
1 project | /r/haskell | 16 Dec 2022

Splitting mtl classes into algebraic and non-algebraic components (url) Factor MonadReader into Ask (algebraic) and Local (non-algebraic) classes Factor MonadWriter into Tell (algebraic) and Listen/Pass (non-algebraic)
[ANN] mtl-2.3.1
2 projects | /r/haskell | 31 Oct 2022
[ANN] mtl-2.3.1-rc1
2 projects | /r/haskell | 29 Aug 2022

It was the example from the ticket which works fine because there is no restriction that the argument to ContT r is a Monad
Confusion about StateT
1 project | /r/haskell | 8 Aug 2022
Draft mtl-2.3 migration guide
3 projects | /r/haskell | 5 Jul 2022

I don't think so, but here is a list of upcoming changes in mtl-3.0.

What are some alternatives?

When comparing errorcall-eq-instance and mtl you can also consider the following projects:

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

parallel - a library for parallel programming

tardis

motor - Type-safe effectful state machines in Haskell

these - An either-or-both data type, with corresponding hybrid error/writer monad transformer.

capability - Extensional capabilities and deriving combinators

ComonadSheet - A library for expressing "spreadsheet-like" computations with absolute and relative references, using fixed-points of n-dimensional comonads.

eveff - Efficient Haskell effect handlers based on evidence translation.

freer-effects - An implementation of "Freer Monads, More Extensible Effects".

mtl-unleashed - MonadReader and MonadState without the functional dependencies

effect-monad - Provides 'graded monads' and 'parameterised monads' to Haskell, enabling fine-grained reasoning about effects.

control-monad-free - Free monads and monad transformers