[Haskell-cafe] abstract extensible types?

Brandon S. Allbery KF8NH allbery at ece.cmu.edu
Wed Nov 12 11:31:02 EST 2008

On 2008 Nov 12, at 5:38, Alberto G. Corona wrote:
> Is there any abstract container  that permits the addition of  new  
> types of data? I know how to simulate the extension of Algebraic  
> datatypes, but this does not permit the addition of data with new  
> types in the same container and recover them in a  type-safe way.
> Did I reinvent the Weel? I found something, that permits this for  
> any Typeable datatype. For example

I think you want http://www.haskell.org/ghc/docs/latest/html/libraries/base/Data-Dynamic.html 

brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.haskell.org/pipermail/haskell-cafe/attachments/20081112/efc59df2/attachment.htm

More information about the Haskell-Cafe mailing list