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Domain Specific Languages

(weitergeleitet von Main.DSL)

Abstractions

VeryHighLevelLanguages
ModelDrivenProgramming

LispMacros
LispForDsls
SyntacticSugar

• Wiki:DomainSpecificLanguage
• Wiki:HighLevelModeling

The basic idea of a domain specific language (DSL) is a computer language that’s targeted to a particular kind of problem, rather than a general purpose language that’s aimed at any kind of software problem.[1]

• internal DSL - embedded DSL: extending a general purpose language
  • BottomUpProgramming
• external DSL
  • language syntax -> CodeGen, interpreter
  • using something like Yacc

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• http://lambda-the-ultimate.org/node/view/634 --the DSL Links
• Ada --for embedded and real-time systems
• http://www.irt.uni-hannover.de/pearl/pearl-gb.html --Pearl: Process and Experiment Automation Realtime Language

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• Using Dot Notation for writing DSLs

Creating DSLs is a pattern that doesn't exist in Python and has no reason to. Most Python users doesn't work that way and don't have a reason to, other languages (Ruby maybe, but Haskell even more so) are great at building DSLs, but that doesn't mean DSLs are the end-of-it-all and should be everywhere. Some languages solve their problems through the use of Domain Specific Languagess, others solve their problems through the use of Domain Specific Libraries.[2]

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• Ruby-style DSL's in Python 2.5
  
• Use PEP 263 for metaprogramming

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• Fear of parsers?

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• Lisp development with macros faster than Python development?..
  • development with specialized languages more efficient than with general purpose languages
    • regex, sql
  • abstractions that are more declarative than procedural
  • using macros there's no need to write parsers
  • seamless integration of the DSL into base language, possibility to use the host-languages features\libraries.

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• Syntactic Sugar: What Makes It Sweet ?

Java people are always scared about unlimited expressivity and Lisp people are always scared about limitations thereof [1]. -> ctually they don't even think there is a valuable distinction between evolving programs and shaping the language. So the term DSL is already an indication of decline.

XAML is a good example for an DSL that is just SyntacticSugar - a very concise one for that matter - that can directly be mapped to objects.

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• Comparing DSLs in Ruby and Scala

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• http://voelterblog.blogspot.com/2006/10/categorization-of-dsls.html