At DuSe III I gave a presentation on writing Domain Specific Languages using Scala based on the work I did for my blogposts on internal and external with Scala.
Domain Specific Languages In Scala Duse3
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After the SQL example I also showed some of the work I did on a custom templating language I wrote as a experiment for Ebay/Markplaats for which I wrote the parser and interpreter in Scala. Maybe I can give some more details on that in the future.