simonmar/happy — pull request #25 by acfoltzer (2014-07-26 00:50:44+00:00)
Title: Add section on using monadic Happy with Alex lexer

From the existing documentation, I had a hard time figuring out how to
use the Happy monad directive with a monadic Alex lexer. This section
contains a skeleton example of how to do the combination, along with
how the combined lexer and parser are called by client code.