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[Protocol-Oriented Monad Transformer](https://www.youtube.com/watch?v=Zmb86zblcto&t=240s)
In that youtube link you can see monad transformers such as mapT, mapTT, flatMapT, else.
By using mapT w…
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Is there for example an instance:
```haskell
instance Selective f => Selective (ReaderT r f a)
```
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Our codebase (specifically on the `feature/utxo-hd` branch) includes a few generalised QuickCheck combinators that work for transformers of the Gen monad. If we would want to be more general, we could…
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The build log in a clean sandbox is:
```
$ cabal install
Resolving dependencies...
Notice: installing into a sandbox located at
C:\Users\jophish\src\haskell\regions\.cabal-sandbox
Configuring stm-2.4…
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Monad transformers in Haskell have been completely under my radar until today.
I did some reading on them, and discovered that they seem to be the "right" types to use when you have a stack of mon…
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```
/tmp/stack-90745e800a2d2fef/conduit-find-0.1.0.3/Data/Cond.hs:41:1: error:
Could not find module ‘Control.Monad.Trans.Either’
Perhaps you meant
Control.Monad.Trans.Wr…
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See code comment:
https://github.com/swarm-game/swarm/blob/6abe9c241b4a59d8707c3ed5db9924fb34649035/src/Swarm/TUI/Editor/Controller.hs#L60-L61
Hackage: https://hackage.haskell.org/package/transf…
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as of e941bd5cf64033c3fc8d072ec2bd7d4bffc6a959 on GHC 8.0, i get the following warnings
```
src/ParamRules.hs:5:1: warning: [-Wdeprecations]
Module ‘Control.Monad.Error’ is deprecated:
Use…
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```
Control/Monad/Logger.hs:140:1: error:
Could not load module ‘Control.Monad.Trans.List’
It is a member of the hidden package ‘transformers-0.5.6.2’.
Perhaps you need to add ‘transfo…