Problems for implementors

• Appendix B is not self-contained. For example, it is necessary to consult Chapter 2, where you are referred to (the wrong section of) Chapter 5, to find a confirmation that qualified names are part of the lexical syntax (i.e., that spaces are not allowed in M.x)
• The original designers of the Haskell syntax decided to design a nice syntax, without restricting themselves to the current parsing technology.
• Text book methods and standard tools can not be used directly out of the box...
• Still, it appears that solving the problem of parsing Haskell is not seen as prestigious enough that someone has been willing to invest the time to do it well.