This source code complements the paper
Zipper-based Attribute Grammars and their Extensions. Pedro Martins, João Paulo Fernandes and João Saraiva. In the proceedings of the 17th Brazilian Symposium on Programming Languages (SBLP’13), September 29 - October 4, Brasilia, Brasil. LNCS

To run all the examples, the Scrap Your Zipper Haskell (syz) package
is necessary, which can be easily installed with:

$ cabal install syz

The examples run with:

$ghci (name_of_file)

To run the AGs, one must write in ghci:

for the files DESK*
$ semantics program

for the file HTMLTableFormatter.hs
$ semantics table

for the file RepMin.hs
$ semantics tree

for the file SmartParentesis.hs
$ semantics expr