protocol vs mtl

protocol

Model distributed system as type-level multi-party protocol. (by epoberezkin)

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hackage.haskell.org

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mtl

The Monad Transformer Library (by haskell)

Control Mtl Haskell monad-transformers Monad

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haskell.org

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protocol		mtl
	Project
-	Mentions	10
1	Stars	357
-	Growth	1.1%
0.0	Activity	0.0
almost 4 years ago	Latest Commit	20 days ago
Haskell	Language	Haskell
BSD 3-clause "New" or "Revised" 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.
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.

protocol

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

We haven't tracked posts mentioning protocol 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 protocol and mtl you can also consider the following projects:

record - Anonymous records

parallel - a library for parallel programming

funflow - Functional workflows

motor - Type-safe effectful state machines in Haskell

machines - Networks of composable stream transducers

capability - Extensional capabilities and deriving combinators

freer-simple - A friendly effect system for Haskell

eveff - Efficient Haskell effect handlers based on evidence translation.

foldl - Composable, streaming, and efficient left folds

mtl-unleashed - MonadReader and MonadState without the functional dependencies

transient - A full stack, reactive architecture for general purpose programming. Algebraic and monadically composable primitives for concurrency, parallelism, event handling, transactions, multithreading, Web, and distributed computing with complete de-inversion of control (No callbacks, no blocking, pure state)

control-monad-free - Free monads and monad transformers