The main goal of the JavaCC 21 project, soon to be renamed as CongoCC, is to develop a very capable, practical, usable parser generator tool. However, there is another overarching goal — perhaps not so much a goal, as a philosophy. That can be summed up in a single word: Demystification You see, somehow or …
NFA stands for “Nondeterministic finite automaton”. (Does that make you nervous?) Read More »
JDK 16 is out! Though JDK 16 was released on 16 March, a week ago, I only became aware of that a few days later on March 20. Once I saw that news item, I figured I would just immediately add support for the new JDK 16 language features to JavaCC. It didn’t take me …
(N.B. Note added 13 June 2021: This article is useful in terms of understanding how to add token hooks to code. However, in terms of solving the specific problem outlined, the article is obsolete. See here for the updated solution.) Since I picked up my work on the JavaCC codebase at the end of 2019, …
“You can’t get there from here!” — The Problem of Context-Sensitive Tokenization Read More »
In the beginning there was… CommonTokenAction Legacy JavaCC had (and still has) a means of applying whatever adjustments (a.k.a. kludges) to a Token just before it is handed off to the parser machinery. You could define a method called CommonTokenAction in your Lexer TokenManager class and this method is invoked when you get another Token …