jUCM: Universal Class Morphing (position paper)

We extend prior work on class-morphing to provide a more expressive pattern-based compile-time reflection language. Our MorphJ language offers a disciplined form of metaprogramming that produces types by statically iterating over and pattern-matching on fields and methods of other types. We expand such capabilities with "universal morphing", which also allows pattern-matching over types (e.g., all classes nested in another, all supertypes of a class) while maintaining modular type safety for our meta-programs. We present informal examples of the functionality and discuss a design for adding universal morphing to Java.

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