Byte Magazine: Lisp

• ferocity

  7 6 2.6 Java

  Write Java expression trees, statements, methods and classes with a LISP-like internal DSL

There is this project

https://github.com/paulhoule/ferocity/

which I might finish up when I'm done with the report I'm writing. It is possible to create Java expression trees with trees of static method calls that look a lot like S-expressions and stick them together into statements, methods and classes.

You should be able to do the same tricks people do with LISP macros and it could work code generation miracles but it would have that "LISP curse" problem in spades.

The plan is to generate a code generator that is sufficient to generate the full DSL implementation (ferocity0) and use that to generate the full implementation (ferocity.)

I have some tests for ferocity0 writing .java files to get fed to javac and for ferocity0 running expression trees with a primitive interpreter. Already the type system is enriched over the type system because interpreted ferocity0 can handle Java expressions as a type at run time so you get issues like quoting and unquoting in LISP.

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