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List:       haskell-cafe
Subject:    RE: [Haskell-cafe] how to avoid overlapping instance error?
From:       "Simon Peyton-Jones" <simonpj () microsoft ! com>
Date:       2005-02-28 23:50:20
Message-ID: 036EAC76E7F5EC4996A3B3C3657D411601CCC854 () EUR-MSG-21 ! europe ! corp ! microsoft ! com
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| Or I suppose, one could rephrase this question as why not
| simplify instance declarations to be:
| 
|    instance ToSet where
|       toSet = Set.fromList
| 
| And let the typechecker take care of figuring out what instance is
| being specified here?

That might be possible, but Haskell forces you to be a bit more
explicit, that's all.

Simon

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