Datatype-Generic Programming with HUGs

  • June 18, 2013 · 7:00 PM

We're joining the lovely Berlin Haskell User Group (HUGs) to hear Andres Löh from Well-Typed talk about Datatype-Generic Programming in Haskell.

Here's the abstract:

Datatype-Generic Programming

Haskell's deriving construct is magical and wonderful at the same time:
wonderful, because with just a single line, you can get functionality for your
newly defined datatype such as (de)serialization, comparison and traversal
functions for free; magical because all of this happens behind the scenes, by
compiler magic. Or does it? Since recently, the Glasgow Haskell Compiler (GHC)
supports a feature that lets you define your own derivable functionality! And
it is not difficult to do, either. All you have to do is understand a little
bit about how Haskell datatypes can be uniformly represented using a limited
set of simple datatypes. Then you can define instances of your code for this
limited set, and get the rest for free. This so-called datype-genericity is so
important, because it further encourages programmers to define domain-specific
and precise types; there's less of a price to pay if lots of functionality is
nearly automatically available for free, even for such new datatypes.

In the talk, I will explain all about how datatype-generic programming in GHC
works, and I will present a number of examples of how it can be used or is
already used in prominent Haskell libraries.

Join or login to comment.

  • Eric N.

    Sorry! Too far away!

    June 17, 2013

  • Bernd Jürgen S.

    Oh, accidently I have mixed this event with the talk 'A Type Driven Approach to Functional Design' on monday. So there are 2 Haskell type talks in a row.­

    June 16, 2013

    • Catonano

      I don´t understand: is there another talk on monday ? That is today ?

      June 17, 2013

    • Emily G.

      looks like it's organised by GOTO Berlin. sorry for annoying timings - wasn't aware it was happening. ah well.

      June 17, 2013

  • A former member
    A former member

    Dammit! I can't make it. Gutted :(

    June 17, 2013

  • Christopher T.

    I got a cold over the weekend, sorry.

    June 17, 2013

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