The Rascal Metaprogramming Language

You want to use the best tool for the job when analyzing, transforming or generating source code, so normally you will end up with many different tools, possibly even written in different languages. Rascal solves this problem by integrating source code analysis, transformation, and generation primitives on the language level. Use it for any kind of metaprogramming task: to construct parsers for programming languages, to analyze and transform source code, or to define new DSLs with full IDE support.

Source: www.rascal-mpl.org