[Haskell-cafe] Haskell on Android

Vasili I. Galchin vigalchin at gmail.com
Thu Jun 18 02:20:33 EDT 2009

On Thu, Jun 18, 2009 at 12:26 AM, Jason Dagit <dagit at codersbase.com> wrote:

> On Wed, Jun 17, 2009 at 9:53 PM, Vasili I. Galchin <vigalchin at gmail.com>wrote:
>> Hello,
>>      Let me change the subject ... I think everybody understood my
>> "thrust" but let me make more provocative. Don, please let me expose my
>> ignorance for the greater good and time my personal scorn ;^) ... "EDSL"
>> time  => Embedded Domain-Specific Language?? If so, can you please be more
>> specific! I don't mind to be a grunt for Haskell.
> Yes, EDSL is Embedded Domain-Specific Language.  Although, I'm not sure I
> understand what you are asking.  I looked at the wiki page which Conal
> created and he does mention using an EDSL in Haskell to generate code.
> Perhaps this is what you want to know more about?
> There is a paper linked from the wiki page that should help a lot with
> answering questions you have about the technique.  For a simple example of
> how it can work, I wrote a program called Autoproc that 'compiles' the
> haskell EDSL into a procmail recipe.  You can find the source code here:
> darcs get http://projects.codersbase.com/repos/autoproc/
        ^^^ cool .. thx.

> It's really not much code so it should be easy to wrap your mind around
> it.  I call the above code simple, but it works quite well and illustrates
> that a little bit of Haskell can go a long ways :)


> How it works is that the expressions you code up in Haskell build up values
> which correspond to the abstract syntax, or your intermediate
> representation.  You can then transform that representation and do whatever
> a compiler or translator would normally do and the target format is some
> other language or machine code.
      . let me read carefully .. thx.

> This technique allows you to reuse the facilites of the host language, such
> as strong static typing and laziness, the parser, standard libs and so on.
> It's a great way to prototype a language and work out the kinks before you
> invest in making a stand alone implementation.  And all that aside, it's
> just plain fun.

           again ;^)


> I hope that helps,
> Jason
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