Re: Puzzling (to me) type error message

Oh, I see. I assumed that is was being re-exported by one of the other imports and was being pulled in like that. I added an explicit import for the type and it now compiles the signature. Thanks. 2009/3/24 Max Bolingbroke :

2009/3/24 Colin Adams :

...

UI.hs:625:45: Not in scope: type constructor or class `Move.Move'

If I then comment-out the type signature for run_ai, it compiles fine with the following warning message:

UI.hs:626:0:    Warning: Definition but no type signature for `run_ai'             Inferred type: run_ai :: Chan Non_interactive_state                                      -> Chan Move.Move                                      -> IO ()

Have you actually imported the Move.Move type? GHC /can/ suggest a type signature that includes type constructors that you haven't imported, but which show up in e.g. the types of imported functions.

Cheers, Max