[Haskell-cafe] functional references and HList?

Martijn van Steenbergen martijn at van.steenbergen.nl
Thu Feb 4 07:18:20 EST 2010

Edward Kmett wrote:
> Functional references let you both read and write 'attributes' in a 
> structure. These can be chained to access members of members.

You can also use them to build bidirectional views on fields (and 
compose those again as well).


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