[Haskell-cafe] I announce my library for checking context-free grammar for ambiguity (was: How to do reversible parsing?)

Hi. In January I asked a question on parsing: https://mail.haskell.org/pipermail/haskell-cafe/2021-January/133275.html . I am currently writing a library, which will solve my problem. It is not finished, but so far I was able to finish and publish one component: checking grammar for ambiguity. Here it is: https://hackage.haskell.org/package/check-cfg-ambiguity . The code is possibly ugly (ST monad), but I'm happy with this code, and I don't plan to change it. It works. It was tested == Askar Safin