10 Apr
2006
10 Apr
'06
2:48 p.m.
wizztick-ghc@douma.eu.org wrote:
Niklas Sorensson wrote:
Main.hs:8:15: Ambiguous occurrence `lift' It could refer to either `Control.Monad.Trans.lift', ... or `Apa.lift', imported from Apa at ...
Is this correct? I would have expected that an unqualified lift could only refer to the one exported from Apa in this case.
The error is correct. The module Control.Monad.State re-export the lift identifier from Control.Monad.Trans.
Thus the line 'import Control.Monad.State' is the evildoer. Use for example:
import Control.Monad.State hiding (lift)
The error message surly makes you look in the wrong direction.
Ideed. Thanks for the explanation! /Niklas