MonadWriter typeclass #93

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YoEight commented May 22, 2012

Partially a port from Haskell MonadWriter.

It pemits to use Writer Monad Transformer computation without type annotations nightmare

This comes with two implementations: WriterT and ValidationT

Here an example

@YoEight YoEight closed this May 23, 2012
YoEight commented May 23, 2012

I'll make a new branch for avoiding this long commit list.

BTW, after studying on Unapply typeclass, I think I could come up with a nicer syntax by provinding an MonadWriterOps typeclass with those methods:

... and so on, just like WriterT

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