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Build Your Own .NET Language and Compiler Edward G. Nilges
Publisher: Apress

Functional languages are killer at creating DSLs. The compiler not only checks for code that can theoretically result in a runnable program, but also disallows things that can lead to problems later on. If a project requires lots of concurrency/parallelism, its own language, or lots of math, you should think functional programming. You wouldn't build your whole system with a DSL, but, like the 5ESS switch, you could use it to code a critical function in a way that is easier to understand and maintain and, therefore, ensure its quality. Obviously the idea of needing to build one's own data structures from scratch is not a factor for at least their huge slice of users. I wrote a computer book (“Build Your Own .Net Language and Compiler”, Edward G. One interesting example NET CLR (and other platforms). BR As I see it the major problem is that Tcl is interpreted (bytescodes are mostly a compile-time feature) while the language portability features of .NET seem to be targeted at (limited to?) compiled languages only. Pascal was designed to be a general purpose language to be suitable for describing data structures and algorithms in a clear way and be suitable for most programming tasks, including compiler writing, text processing, scientific/numerical/ graphics programming, information management programming, and system programming. Most importantly, he provides some answers as to why you would want to create your own DSL and discusses why he chooses to create DSL's on top of the Boo language. Nilges, Apress 2004): I've met computer authors at unemployment offices. Compiler assistance: It felt really good to get back to a compiled language.