[Haskell-cafe] Show instances for error messages (Was: Refactoring status)

Lutz Donnerhacke lutz at iks-jena.de
Mon Jan 7 06:56:06 EST 2008

* Henning Thielemann wrote:
> happen. Paradoxical. It would be interesting if it is possible to tunnel
> Show class dictionaries through to an 'error' like IO is tunneled to
> 'trace'.

unsafeShow :: (forall a . Show a => a) -> String

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