[Fwd: Oops [Fwd: Re: Allowing duplicate instances in GHC 6.4]]

[Robert van Herk]

Sorry, oops again:

The problem is that it complains that it cannot find an instance for
  Datasource' z [MyKeyVal] [MyKeyVal] Float Int

Whilst I have an instance
  Datasource [MyKeyVal] Float Int

Thus, it seems that it needs an explicit type for the z here.

Both datasources stored in the joined datasource are of type [MyKeyVal], 
so I would expect this to compile correctly, and then take the left 
datasource.

Sorry that my explanation is all so confusing....

Robert
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From: Robert van Herk <rherk at cs.uu.nl>
Subject: Oops [Fwd: Re: Allowing duplicate instances in GHC 6.4]
Date: Thu, 31 Mar 2005 17:05:47 +0200
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Url: http://www.haskell.org//pipermail/glasgow-haskell-users/attachments/20050331/359b325c/AllowingduplicateinstancesinGHC6.eml