[Haskell-cafe] Design of a DSL in Haskell

[Kim-Ee Yeoh]

Joerg,

For definitions I'd search for Andres Loeh and "haskell edsl". His PDF
slides also have code examples which'll help.

Lennart also gave a talk this year titled "making edsls fly". The video is
on the web.

If you have specific questions bring them to the list! The community is a
tremendous resource!

-- Kim-Ee



On Wed, Dec 5, 2012 at 2:09 PM, Joerg Fritsch <fritsch at joerg.cc> wrote:

> Kim-Eeh, Tillmann,
>
> I am interested in the definition of deep vs shallow embedded, even if it
> is not featured in the Fowler textbook. Fowler that is one textbook "only"
> and I am not focused on it.
>
> --Joerg
>
>
> On Dec 5, 2012, at 2:59 AM, Kim-Ee Yeoh wrote:
>
> On Wed, Dec 5, 2012 at 8:32 AM, Tillmann Rendel <
> rendel at informatik.uni-marburg.de> wrote:
>
>> I mean internal == embedded, independently of deep vs. shallow, following
>> Martin Fowler [1].
>> [1] http://martinfowler.com/bliki/**DomainSpecificLanguage.html<http://martinfowler.com/bliki/DomainSpecificLanguage.html>
>>
>
> If I look here [2] I see:
>
> "An *internal DSL* is just a particular idiom of writing code in the host
> language. So a Ruby internal DSL is Ruby code, just written in particular
> style which gives a more language-like feel. As such they are often called
> *Fluent Interfaces* or*Embedded DSLs*. An *external DSL* is a completely
> separate language that is parsed into data that the host language can
> understand."
>
> Fowler places undue emphasis on the "completely separate language", but
> other than that, the correspondence is clear. I wonder how he thinks about
> C implementing C? Or ghc implementing haskell in haskell? Would he say,
> "Well, clearly C and haskell are not DSLs, they are general purpose
> languages!"?
>
> [2] http://martinfowler.com/bliki/DslQandA.html
>
> -- Kim-Ee
>
>
>
>>
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