[Haskell-cafe] SYB and/or HList for XML, deserialization and collections

Alex Jacobson alex at alexjacobson.com
Thu Dec 28 16:50:34 EST 2006

I'd really rather factor our the template haskell.  It does not leave me 
feeling good.

At the specific level, TemplateHaskell doesn't solve the problem of 
getting good XML element names.  For example with HList lets me annotate 
labels with information about whether they are attributes or elements.

At the usage level, it does not traverse other modules easily and forces 
you to do weird things with code order in order to compile.

At the concept level, I find it way too hard to think in terms of the 
abstract syntax of Haskell.  I'd rather be thinking in terms of 
application semantics.

At the implementation level, it forces the generation of standard 
accessor names e.g. withFoo for every foo, rather than supporting a 
general syntax for access or update.


Bulat Ziganshin wrote:
> Hello S.,
> Wednesday, December 27, 2006, 2:24:00 AM, you wrote:
>> Having just done a major refactor of the HAppS HTTP API to make it 
>> much much easier to use, I am now thinking about simplifying the 
>> current boilerplate associated with XML serialization and state 
>> deserialization.
> are you considered using Template Haskell to do it? at least it is used for
> automatic generation of class instances for binary serialization

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