RE: Are Happy-generated parsers lazy?

I am running into trouble with the HaXml parser because it is not lazy. Hence I am considering to abondon the use of XML as data-exchange format. Anyway, XML documents are too verbose.

Now I wonder whether Happy-generated parsers are lazy?

If you mean will it parse the input lazilly and return a lazy parse tree, then the answer is no. Happy uses LALR(1) parsing, which means that it needs to see the end of a syntactic object before reducing it. Cheers, Simon