Yes, MPS and "language workbenches" in general are chasing something similar. Ideas like these are entirely in the details though, and so far I haven't found an

Yes, MPS and "language workbenches" in general are chasing something similar. Ideas like these are entirely in the details though, and so far I haven't found anything which does it for me. I could easily be missing it, in part because systems like MPS have a high up-front investment, and I have regretted such investments more often than not.