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GHC/Type system

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Revision as of 07:27, 10 August 2006

1 Type system extensions in GHC

GHC comes with a rather lare collection of type-system extensions (beyond Haskell 98). They are all documented in the user manual, but this page is a place to record observations, notes, and suggestions on them.

1.1 Overlapping instances

Here an interesting message about the interaction of existential types and overlapping instances.