Semantic Actions in the ATG File is java code written
by the user which is added to the parser by
Coco. It is of course possible that there are
errors in this part of grammar, which won’t be detected by
Coco. Even after Scanner and parser are
successfully generated, the job is not done. The file Parser.java is compiled
for possible errors.
correct these errors, it is not enough to change the code in
Parser.java. The changes muss take place in the .atg file. Clicking
the redirect button, as shown below, you can look for the parser
errors in your grammar file.