This release fixes a number of typos in the text and in some code, including a few references to the wrong class name or filename and a critical error in the type promotion code. The discussion of switch-on-token-type visitor advantages over traditional double-dispatch visitors is now more clear.
Check out the book’s errata page for more details.
Complete with index and copyedits, on its way to being typeset and printed.
This is the final draft–September 25, 2009
First draft complete. Added “Putting it all together” chapter. I go through a number of examples and leave the implementation to you. I reference suitable patterns from the book and give you the basic strategy. Fixed the errata listed for beta 5.x.
There was a production problem with B2.0 such that the pattern headlines did not appear. That has been corrected in 2.1.