Proposal: Make Q an instance of Applicative

The Q type:

newtype Q a = Q { unQ :: forall m. Quasi m => m a} 

currently has an instance for Monad and Functor. I always find it surprising when a monad doesn't have an Applicative instance. So I would like to propose adding an instance for Applicative as well.

I also propose to make Applicative a superclass of the Quasi class:

class (Monad m, Applicative m, Functor m) => Quasi m where ...

During the discussion on the libraries list Michael Snoyman, Wren ng Thornton and Edward Kmett replied positively. There were no objections.

Trac metadata

Trac field	Value
Version	7.0.3
Type	FeatureRequest
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Template Haskell
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