It's a version of lift that penetrates a long chain of MonadTrans-y types. It's a more general version of things like this:
https://hackage.haskell.org/package/mtl-2.2.1/docs/Control-Monad-State-Class.html#t:MonadState

Pay attention to the instances, and work out how they resolve this:
liftBase :: IO a -> IdentityT (IdentityT (IdentityT IO)) a

On 2/4/2017 10:06 AM, Guru Devanla wrote:

Hello,

I am trying to understand the purpose of the MonadBase class.

https://hackage.haskell.org/package/transformers-base-0.4.4/docs/Control-Monad-Base.html

Google search did not give me any helpful answers. Please could some one help me understand the purpose of this class and also point me to any good resources.

Thanks

Guru
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