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quite often, you don't need the full power of a monad and the corresponding applicative functor is sufficient. these cases could be detected by the macro.
additionally, there are at least some monads…
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On https://www.haskell.org/hoogle/ (link in the readme) searching [`m (m a) -> m a`](https://www.haskell.org/hoogle/?hoogle=m+%28m+a%29+-%3E+m+a) shows `join` as first hit.
This matches expectation.
…
unode updated
6 years ago
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## 🐛 Bug report
### Current Behavior
Currently the `chain` method for `getValidation` uses the `Either` instance, and this leads to conflicting semantics between `chain` and `ap`
### Expected…
lepsa updated
3 years ago
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We've developed monotone predicate monads for e.g. monotone typed state.
I was wondering if there is interest in getting such definitions into the standard library.
If so, I can prepare a PR.
One…
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`SelectT` is in http://hackage.haskell.org/package/transformers-0.5.4.0/docs/Control-Monad-Trans-Select.html but is missing from `transformers type Select r a = ((a -> r) -> a)
Djinn> ?dimap :: (a->b…
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This project has incorrect dependency - monad-loops, but should be monad-loops-stm.
And also in src/Control/Concurrent/RWLock.hs replace
import Control.Monad.Loops
with
import Control.Monad.Loops.STM…
daapp updated
11 years ago
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I keep getting error:
```haskell
• Couldn't match type ‘IO’
with ‘Control.Monad.Log.LoggingT
(Control.Monad.Log.WithSeverity Doc)
…
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Is the lazy sampler actually a monad? I believe it doesn't satisfy the monad laws:
```
ghci> import Control.Monad.Bayes.Sampler.Lazy
ghci> import System.Random
ghci> g let prog = (Control.Monad…
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Needs generics.
```
type Maybe a = Just a | Nothing
type Either a b = Left a | Right b
type Tree a = Node a | (Tree a, Tree a)
```
Bonus: monads
```
interface Monad a {
func Bind(Monad …
quetz updated
7 years ago