Re: ... and another?

Malcolm Wallace <[email protected]> Tue, 1 Nov 2005 16:20:16 +0000

Newsgroups	gmane.comp.lang.haskell.hat
Organization	Dept of Computer Science, University of York
Message-ID	<[email protected]>

Thomas Davie <[email protected]> writes:

> data Result = Result { ... }
>                    deriving Show
> 
> data ClassTable = ClassTable (Map.Map String [TypeMatch])
>                    deriving Show
> 
> generates code that has the function a25v28v25v31showsPrec in both  
> modules, and thus causes this error:

As a workaround, try inserting or deleting an extra blank line (or
spaces) in one of the files.

> Hat/MatchClass.hs:30:12:
>      Ambiguous occurrence `a25v28v25v31showsPrec'
>      It could refer to either `Hat.MatchClass.a25v28v25v31showsPrec',  
>                            or `Hat.Result.a25v28v25v31showsPrec',  

The identifier a25v28v25v31 comes from the position of the deriving
Show clause, (line 25, char 28) upto (line 25, char 31).

Regards,
    Malcolm