On Saturday, 22 May 2021 at 17:32:34 UTC, sighoya wrote:
But I think providing an external ast tree mapped onto the changing internal one used by DMD would be a feasible approach.
It is feasible, but if you want to do it well you should think in terms of rewrite engines with patternmatching, think XSLT or Pure (not exactly, but in that direction).
I think it is better to design such a language from scratch.
