26 Feb
2011
26 Feb
'11
7:28 a.m.
On Saturday 26 February 2011 12:54:02, Yves Parès wrote:
When I look at the documentation of Control.Monad.Error [1] or Control.Applicative [2] it is not said that it re-exports Control.Monad.Instances. So maybe this behaviour is normal...
I don't think so. Instances are automatically propagated, they can't be hidden once they're in scope. Functor, Monad, Either and (->) are all available in the Prelude, so unless you have NoImplicitPrelude, the instances ought to be in scope from any transitive dependency. And they are in scope for me when I import Control.Monad.Error or Control.Applicative, so something is amiss if they're not in scope for you.